diff options
| -rw-r--r-- | Makefile | 6 | ||||
| -rw-r--r-- | asn1.c | 10 | ||||
| -rw-r--r-- | asn1_internal.h | 3 | ||||
| -rw-r--r-- | hal.h | 21 | ||||
| -rw-r--r-- | hal_internal.h | 24 | ||||
| -rw-r--r-- | hashsig.c | 1811 | ||||
| -rw-r--r-- | hashsig.h | 115 | ||||
| -rw-r--r-- | ks.c | 4 | ||||
| -rw-r--r-- | ks_volatile.c | 8 | ||||
| -rw-r--r-- | rpc_api.c | 23 | ||||
| -rw-r--r-- | rpc_client.c | 41 | ||||
| -rw-r--r-- | rpc_pkey.c | 206 | ||||
| -rw-r--r-- | rpc_server.c | 34 | ||||
| -rw-r--r-- | tests/Makefile | 4 | ||||
| -rw-r--r-- | tests/test-hashsig.h | 392 | ||||
| -rw-r--r-- | tests/test-rpc_hashsig.c | 528 |
16 files changed, 3204 insertions, 26 deletions
@@ -34,7 +34,7 @@ STATIC_CORE_STATE_BLOCKS = 32 STATIC_HASH_STATE_BLOCKS = 32 STATIC_HMAC_STATE_BLOCKS = 16 STATIC_PKEY_STATE_BLOCKS = 256 -STATIC_KS_VOLATILE_SLOTS = 128 +STATIC_KS_VOLATILE_SLOTS = 1280 LIB = libhal.a @@ -93,7 +93,7 @@ endif # makefile, so the working definition of "always want" is sometimes # just "building this is harmless even if we don't use it." -OBJ += errorstrings.o hash.o asn1.o ecdsa.o rsa.o xdr.o slip.o +OBJ += errorstrings.o hash.o asn1.o ecdsa.o rsa.o hashsig.o xdr.o slip.o OBJ += rpc_api.o rpc_hash.o uuid.o rpc_pkcs1.o crc32.o locks.o logging.o # Object files to build when we're on a platform with direct access @@ -220,6 +220,7 @@ CFLAGS += -DHAL_STATIC_CORE_STATE_BLOCKS=${STATIC_CORE_STATE_BLOCKS} CFLAGS += -DHAL_STATIC_HASH_STATE_BLOCKS=${STATIC_HASH_STATE_BLOCKS} CFLAGS += -DHAL_STATIC_HMAC_STATE_BLOCKS=${STATIC_HMAC_STATE_BLOCKS} CFLAGS += -DHAL_STATIC_PKEY_STATE_BLOCKS=${STATIC_PKEY_STATE_BLOCKS} +CFLAGS += -DHAL_STATIC_KS_VOLATILE_SLOTS=${STATIC_KS_VOLATILE_SLOTS} CFLAGS += -I${CRYPTECH_ROOT}/sw/libhal CFLAGS += -I${LIBTFM_BLD} @@ -272,6 +273,7 @@ novena-eim.o hal_io_eim.o: novena-eim.h slip.o rpc_client_serial.o rpc_server_serial.o: slip_internal.h ${OBJ}: verilog_constants.h rpc_client.o rpc_server.o xdr.o: xdr_internal.h +hashsig.o: hashsig.h last_gasp_pin_internal.h: ./utils/last_gasp_default_pin >$@ @@ -77,6 +77,10 @@ const uint8_t hal_asn1_oid_aesKeyWrap[] = { 0x60, 0x86, 0x48, 0x01, 0x65, 0x03, const size_t hal_asn1_oid_aesKeyWrap_len = sizeof(hal_asn1_oid_aesKeyWrap); #endif +/* from draft-housley-cms-mts-hash-sig-07.txt */ +const uint8_t hal_asn1_oid_mts_hashsig[] = { 0x2A, 0x86, 0x48, 0x86, 0xF7, 0x0D, 0x01, 0x09, 0x10, 0x03, 0x11 }; +const size_t hal_asn1_oid_mts_hashsig_len = sizeof(hal_asn1_oid_mts_hashsig); + /* * Encode tag and length fields of an ASN.1 object. * @@ -932,6 +936,12 @@ hal_error_t hal_asn1_guess_key_type(hal_key_type_t *type, return err; } + if (alg_oid_len == hal_asn1_oid_mts_hashsig_len && memcmp(alg_oid, hal_asn1_oid_mts_hashsig, alg_oid_len) == 0) { + *type = public ? HAL_KEY_TYPE_HASHSIG_PUBLIC : HAL_KEY_TYPE_HASHSIG_PRIVATE; + *curve = HAL_CURVE_NONE; + return HAL_OK; + } + *type = HAL_KEY_TYPE_NONE; *curve = HAL_CURVE_NONE; return HAL_ERROR_UNSUPPORTED_KEY; diff --git a/asn1_internal.h b/asn1_internal.h index bba4503..23d8a77 100644 --- a/asn1_internal.h +++ b/asn1_internal.h @@ -102,6 +102,9 @@ extern const size_t hal_asn1_oid_ecPublicKey_len; extern const uint8_t hal_asn1_oid_aesKeyWrap[]; extern const size_t hal_asn1_oid_aesKeyWrap_len; +extern const uint8_t hal_asn1_oid_mts_hashsig[]; +extern const size_t hal_asn1_oid_mts_hashsig_len; + /* * Transcoding functions. */ @@ -161,6 +161,7 @@ DEFINE_HAL_ERROR(HAL_ERROR_KEYSTORE_WRONG_BLOCK_TYPE, "Wrong block type in keystore") \ DEFINE_HAL_ERROR(HAL_ERROR_RPC_PROTOCOL_ERROR, "RPC protocol error") \ DEFINE_HAL_ERROR(HAL_ERROR_NOT_IMPLEMENTED, "Not implemented") \ + DEFINE_HAL_ERROR(HAL_ERROR_HASHSIG_KEY_EXHAUSTED, "Key exhausted") \ END_OF_HAL_ERROR_LIST /* Marker to forestall silly line continuation errors */ @@ -226,8 +227,6 @@ extern hal_addr_t hal_core_base(const hal_core_t *core); extern hal_core_t * hal_core_iterate(hal_core_t *core); extern void hal_core_reset_table(void); extern hal_error_t hal_core_alloc(const char *name, hal_core_t **core); -extern hal_error_t hal_core_alloc2(const char *name1, hal_core_t **pcore1, - const char *name2, hal_core_t **pcore2); extern void hal_core_free(hal_core_t *core); extern void hal_critical_section_start(void); extern void hal_critical_section_end(void); @@ -413,7 +412,11 @@ typedef enum { HAL_KEY_TYPE_RSA_PRIVATE, HAL_KEY_TYPE_RSA_PUBLIC, HAL_KEY_TYPE_EC_PRIVATE, - HAL_KEY_TYPE_EC_PUBLIC + HAL_KEY_TYPE_EC_PUBLIC, + HAL_KEY_TYPE_HASHSIG_PRIVATE, + HAL_KEY_TYPE_HASHSIG_PUBLIC, + HAL_KEY_TYPE_HASHSIG_LMS, + HAL_KEY_TYPE_HASHSIG_LMOTS, } hal_key_type_t; typedef enum { @@ -794,6 +797,18 @@ extern hal_error_t hal_rpc_pkey_generate_ec(const hal_client_handle_t client, const hal_curve_name_t curve, const hal_key_flags_t flags); +typedef enum lmots_algorithm_type lmots_algorithm_t; +typedef enum lms_algorithm_type lms_algorithm_t; + +extern hal_error_t hal_rpc_pkey_generate_hashsig(const hal_client_handle_t client, + const hal_session_handle_t session, + hal_pkey_handle_t *pkey, + hal_uuid_t *name, + const size_t hss_levels, + const lms_algorithm_t lms_type, + const lmots_algorithm_t lmots_type, + const hal_key_flags_t flags); + extern hal_error_t hal_rpc_pkey_close(const hal_pkey_handle_t pkey); extern hal_error_t hal_rpc_pkey_delete(const hal_pkey_handle_t pkey); diff --git a/hal_internal.h b/hal_internal.h index a97a8f2..4d812cc 100644 --- a/hal_internal.h +++ b/hal_internal.h @@ -48,7 +48,7 @@ */ /* - * htonl is not available in arm-none-eabi headers or libc. + * htonl and htons are not available in arm-none-eabi headers or libc. */ #ifndef STM32F4XX #include <arpa/inet.h> @@ -62,10 +62,18 @@ inline uint32_t htonl(uint32_t w) ((w & 0x00ff0000) >> 8) + ((w & 0xff000000) >> 24); } +inline uint16_t htons(uint16_t w) +{ + return + ((w & 0x00ff) << 8) + + ((w & 0xff00) >> 8); +} #else /* big endian */ #define htonl(x) (x) +#define htons(x) (x) #endif #define ntohl htonl +#define ntohs htons #endif /* @@ -281,6 +289,15 @@ typedef struct { const hal_curve_name_t curve, const hal_key_flags_t flags); + hal_error_t (*generate_hashsig)(const hal_client_handle_t client, + const hal_session_handle_t session, + hal_pkey_handle_t *pkey, + hal_uuid_t *name, + const size_t hss_levels, + const lms_algorithm_t lms_type, + const lmots_algorithm_t lmots_type, + const hal_key_flags_t flags); + hal_error_t (*close)(const hal_pkey_handle_t pkey); hal_error_t (*delete)(const hal_pkey_handle_t pkey); @@ -635,9 +652,10 @@ typedef enum { RPC_FUNC_PKEY_GET_ATTRIBUTES, RPC_FUNC_PKEY_EXPORT, RPC_FUNC_PKEY_IMPORT, + RPC_FUNC_PKEY_GENERATE_HASHSIG, } rpc_func_num_t; -#define RPC_VERSION 0x01010000 /* 1.1.0.0 */ +#define RPC_VERSION 0x01010100 /* 1.1.1.0 */ /* * RPC client locality. These have to be defines rather than an enum, @@ -654,7 +672,7 @@ typedef enum { */ #ifndef HAL_RPC_MAX_PKT_SIZE -#define HAL_RPC_MAX_PKT_SIZE 4096 +#define HAL_RPC_MAX_PKT_SIZE 16384 #endif /* diff --git a/hashsig.c b/hashsig.c new file mode 100644 index 0000000..13f20c6 --- /dev/null +++ b/hashsig.c @@ -0,0 +1,1811 @@ +/* + * hashsig.c + * --------- + * Implementation of draft-mcgrew-hash-sigs-08.txt + * + * Copyright (c) 2018, NORDUnet A/S All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are + * met: + * - Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * + * - Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * - Neither the name of the NORDUnet nor the names of its contributors may + * be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS + * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED + * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A + * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED + * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF + * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING + * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS + * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#include "hal.h" +#include "hashsig.h" +#include "ks.h" +#include "asn1_internal.h" +#include "xdr_internal.h" + +typedef struct { uint8_t bytes[32]; } bytestring32; +typedef struct { uint8_t bytes[16]; } bytestring16; + +#define D_PBLC 0x8080 +#define D_MESG 0x8181 +#define D_LEAF 0x8282 +#define D_INTR 0x8383 + +#define u32str(X) htonl(X) +#define u16str(X) htons(X) +#define u8str(X) (X & 0xff) + +#define check(op) do { hal_error_t _err = (op); if (_err != HAL_OK) return _err; } while (0) + +/* ---------------------------------------------------------------- */ + +/* + * XDR extensions + */ + +static inline hal_error_t hal_xdr_encode_bytestring32(uint8_t ** const outbuf, const uint8_t * const limit, const bytestring32 * const value) +{ + return hal_xdr_encode_fixed_opaque(outbuf, limit, (const uint8_t *)value, sizeof(bytestring32)); +} + +static inline hal_error_t hal_xdr_decode_bytestring32_ptr(const uint8_t ** const inbuf, const uint8_t * const limit, bytestring32 **value) +{ + return hal_xdr_decode_fixed_opaque_ptr(inbuf, limit, (const uint8_t ** const)value, sizeof(bytestring32)); +} + +static inline hal_error_t hal_xdr_decode_bytestring32(const uint8_t ** const inbuf, const uint8_t * const limit, bytestring32 * const value) +{ + return hal_xdr_decode_fixed_opaque(inbuf, limit, (uint8_t * const)value, sizeof(bytestring32)); +} + +static inline hal_error_t hal_xdr_encode_bytestring16(uint8_t ** const outbuf, const uint8_t * const limit, const bytestring16 *value) +{ + return hal_xdr_encode_fixed_opaque(outbuf, limit, (const uint8_t *)value, sizeof(bytestring16)); +} + +static inline hal_error_t hal_xdr_decode_bytestring16_ptr(const uint8_t ** const inbuf, const uint8_t * const limit, bytestring16 **value) +{ + return hal_xdr_decode_fixed_opaque_ptr(inbuf, limit, (const uint8_t ** const)value, sizeof(bytestring16)); +} + +static inline hal_error_t hal_xdr_decode_bytestring16(const uint8_t ** const inbuf, const uint8_t * const limit, bytestring16 * const value) +{ + return hal_xdr_decode_fixed_opaque(inbuf, limit, (uint8_t * const)value, sizeof(bytestring16)); +} + +/* ---------------------------------------------------------------- */ + +/* + * ASN.1 extensions + */ + +#define hal_asn1_encode_size_t(n, der, der_len, der_max) \ + hal_asn1_encode_uint32((const uint32_t)n, der, der_len, der_max) + +#define hal_asn1_decode_size_t(np, der, der_len, der_max) \ + hal_asn1_decode_uint32((uint32_t *)np, der, der_len, der_max) + +#define hal_asn1_encode_lms_algorithm(type, der, der_len, der_max) \ + hal_asn1_encode_uint32((const uint32_t)type, der, der_len, der_max) + +#define hal_asn1_decode_lms_algorithm(type, der, der_len, der_max) \ + hal_asn1_decode_uint32((uint32_t *)type, der, der_len, der_max) + +#define hal_asn1_encode_lmots_algorithm(type, der, der_len, der_max) \ + hal_asn1_encode_uint32((const uint32_t)type, der, der_len, der_max) + +#define hal_asn1_decode_lmots_algorithm(type, der, der_len, der_max) \ + hal_asn1_decode_uint32((uint32_t *)type, der, der_len, der_max) + +#define hal_asn1_encode_uuid(data, der, der_len, der_max) \ + hal_asn1_encode_octet_string((const uint8_t * const)data, sizeof(hal_uuid_t), der, der_len, der_max) + +#define hal_asn1_decode_uuid(data, der, der_len, der_max) \ + hal_asn1_decode_octet_string((uint8_t *)data, sizeof(hal_uuid_t), der, der_len, der_max) + +#define hal_asn1_encode_bytestring16(data, der, der_len, der_max) \ + hal_asn1_encode_octet_string((const uint8_t * const)data, sizeof(bytestring16), der, der_len, der_max) + +#define hal_asn1_decode_bytestring16(data, der, der_len, der_max) \ + hal_asn1_decode_octet_string((uint8_t *)data, sizeof(bytestring16), der, der_len, der_max) + +#define hal_asn1_encode_bytestring32(data, der, der_len, der_max) \ + hal_asn1_encode_octet_string((const uint8_t * const)data, sizeof(bytestring32), der, der_len, der_max) + +#define hal_asn1_decode_bytestring32(data, der, der_len, der_max) \ + hal_asn1_decode_octet_string((uint8_t *)data, sizeof(bytestring32), der, der_len, der_max) + + +/* ---------------------------------------------------------------- */ + +/* + * LM-OTS + */ + +static uint8_t coef1(const uint8_t * const S, const size_t i); +static uint8_t coef2(const uint8_t * const S, const size_t i); +static uint8_t coef4(const uint8_t * const S, const size_t i); +static uint8_t coef8(const uint8_t * const S, const size_t i); + +typedef const struct lmots_parameter_set { + lmots_algorithm_t type; + size_t n, w, w2, p, ls; + uint8_t (*coef)(const uint8_t * const S, const size_t i); +} lmots_parameter_t; +static lmots_parameter_t lmots_parameters[] = { + { lmots_sha256_n32_w1, 32, 1, 2, 265, 7, coef1 }, + { lmots_sha256_n32_w2, 32, 2, 4, 133, 6, coef2 }, + { lmots_sha256_n32_w4, 32, 4, 16, 67, 4, coef4 }, + { lmots_sha256_n32_w8, 32, 8, 256, 34, 0, coef8 }, +}; + +typedef struct lmots_key { + hal_key_type_t type; + lmots_parameter_t *lmots; + bytestring16 I; + size_t q; + bytestring32 * x; + bytestring32 K; +} lmots_key_t; + +static inline lmots_parameter_t *lmots_select_parameter_set(const lmots_algorithm_t lmots_type) +{ + if (lmots_type < lmots_sha256_n32_w1 || lmots_type > lmots_sha256_n32_w8) + return NULL; + else + return &lmots_parameters[lmots_type - lmots_sha256_n32_w1]; +} + +static inline size_t lmots_private_key_len(lmots_parameter_t * const lmots) +{ + /* u32str(type) || I || u32str(q) || x[0] || x[1] || ... || x[p-1] */ + return 2 * sizeof(uint32_t) + sizeof(bytestring16) + (lmots->p * lmots->n); +} + +static inline size_t lmots_public_key_len(lmots_parameter_t * const lmots) +{ + /* u32str(type) || I || u32str(q) || K */ + return 2 * sizeof(uint32_t) + sizeof(bytestring16) + lmots->n; +} + +static inline size_t lmots_signature_len(lmots_parameter_t * const lmots) +{ + /* u32str(type) || C || y[0] || ... || y[p-1] */ + return sizeof(uint32_t) + (lmots->p + 1) * lmots->n; +} + +#if RPC_CLIENT == RPC_CLIENT_LOCAL +/* Given a key with most fields filled in, generate the lmots private and + * public key components. + * Let the caller worry about storage. + */ +static hal_error_t lmots_generate(lmots_key_t * const key) +{ + if (key == NULL || key->type != HAL_KEY_TYPE_HASHSIG_LMOTS || key->lmots == NULL || key->x == NULL) + return HAL_ERROR_BAD_ARGUMENTS; + +// Algorithm 0: Generating a Private Key + +// 3. set n and p according to the typecode and Table 1 + + size_t n = key->lmots->n; + size_t p = key->lmots->p; + size_t w2 = key->lmots->w2; + +// 4. compute the array x as follows: +// for ( i = 0; i < p; i = i + 1 ) { +// set x[i] to a uniformly random n-byte string +// } + + for (size_t i = 0; i < p; ++i) + check(hal_rpc_get_random(&key->x[i], n)); + +// Algorithm 1: Generating a One Time Signature Public Key From a +// Private Key + +// 4. compute the string K as follows: + + uint8_t statebuf[512]; + hal_hash_state_t *state = NULL; + bytestring32 y[p]; + uint32_t l; + uint16_t s; + uint8_t b; + +// for ( i = 0; i < p; i = i + 1 ) { + for (size_t i = 0; i < p; ++i) { + +// tmp = x[i] + bytestring32 tmp; + memcpy(&tmp, &key->x[i], sizeof(tmp)); + +// for ( j = 0; j < 2^w - 1; j = j + 1 ) { + for (size_t j = 0; j < w2 - 1; ++j) { + +// tmp = H(I || u32str(q) || u16str(i) || u8str(j) || tmp) + check(hal_hash_initialize(NULL, hal_hash_sha256, &state, statebuf, sizeof(statebuf))); + check(hal_hash_update(state, (const uint8_t *)&key->I, sizeof(key->I))); + l = u32str(key->q); check(hal_hash_update(state, (const uint8_t *)&l, sizeof(l))); + s = u16str(i); check(hal_hash_update(state, (const uint8_t *)&s, sizeof(s))); + b = u8str(j); check(hal_hash_update(state, (const uint8_t *)&b, sizeof(b))); + check(hal_hash_update(state, (const uint8_t *)&tmp, sizeof(tmp))); + check(hal_hash_finalize(state, (uint8_t *)&tmp, sizeof(tmp))); + } + +// y[i] = tmp + memcpy(&y[i], &tmp, sizeof(tmp)); +// } + } + +// K = H(I || u32str(q) || u16str(D_PBLC) || y[0] || ... || y[p-1]) + check(hal_hash_initialize(NULL, hal_hash_sha256, &state, statebuf, sizeof(statebuf))); + check(hal_hash_update(state, (const uint8_t *)&key->I, sizeof(key->I))); + l = u32str(key->q); check(hal_hash_update(state, (const uint8_t *)&l, sizeof(l))); + s = u16str(D_PBLC); check(hal_hash_update(state, (const uint8_t *)&s, sizeof(s))); + for (size_t i = 0; i < p; ++i) + check(hal_hash_update(state, (const uint8_t *)&y[i], sizeof(y[i]))); + check(hal_hash_finalize(state, (uint8_t *)&key->K, sizeof(key->K))); + + return HAL_OK; +} +#endif + +/* coef() functions for the supported values of w. + * This is a bit of premature optimization, because coef() gets called a lot. + */ + +/* w = 1 */ +static uint8_t coef1(const uint8_t * const S, const size_t i) +{ + return (S[i/8] >> (7 - (i % 8))) & 0x01; +} + +/* w = 2 */ +static uint8_t coef2(const uint8_t * const S, const size_t i) +{ + return (S[i/4] >> (6 - (2 * (i % 4)))) & 0x03; +} + +/* w = 4 */ +static uint8_t coef4(const uint8_t * const S, const size_t i) +{ + uint8_t byte = S[i/2]; + if (i % 2) + byte >>= 4; + return byte & 0x0f; +} + +/* w = 8 */ +static uint8_t coef8(const uint8_t * const S, const size_t i) +{ + return S[i]; +} + +/* checksum */ +static uint16_t Cksm(const uint8_t * const S, lmots_parameter_t *lmots) +{ + uint16_t sum = 0; + + for (size_t i = 0; i < (lmots->n * 8 / lmots->w); ++i) + sum += (lmots->w2 - 1) - lmots->coef(S, i); + + return (sum << lmots->ls); +} + +#if RPC_CLIENT == RPC_CLIENT_LOCAL +static hal_error_t lmots_sign(lmots_key_t *key, + const uint8_t * const msg, const size_t msg_len, + uint8_t * sig, size_t *sig_len, const size_t sig_max) +{ + if (key == NULL || key->type != HAL_KEY_TYPE_HASHSIG_LMOTS || msg == NULL || sig == NULL) + return HAL_ERROR_BAD_ARGUMENTS; + +// Algorithm 3: Generating a One Time Signature From a Private Key and a +// Message + +// 1. set type to the typecode of the algorithm +// +// 2. set n, p, and w according to the typecode and Table 1 + + size_t n = key->lmots->n; + size_t p = key->lmots->p; + uint8_t (*coef)() = key->lmots->coef; + + if (sig_max < lmots_signature_len(key->lmots)) + return HAL_ERROR_BAD_ARGUMENTS; + +// 3. determine x, I and q from the private key +// +// 4. set C to a uniformly random n-byte string + + bytestring32 C; + check(hal_rpc_get_random(&C, n)); + +// 5. compute the array y as follows: + + uint8_t statebuf[512]; + hal_hash_state_t *state = NULL; + uint8_t Q[n + 2]; /* hash || 16-bit checksum */ + uint32_t l; + uint16_t s; + uint8_t b; + +// Q = H(I || u32str(q) || u16str(D_MESG) || C || message) + check(hal_hash_initialize(NULL, hal_hash_sha256, &state, statebuf, sizeof(statebuf))); + check(hal_hash_update(state, (const uint8_t *)&key->I, sizeof(key->I))); + l = u32str(key->q); check(hal_hash_update(state, (const uint8_t *)&l, sizeof(l))); + s = u16str(D_MESG); check(hal_hash_update(state, (const uint8_t *)&s, sizeof(s))); + check(hal_hash_update(state, (const uint8_t *)&C, sizeof(C))); + check(hal_hash_update(state, msg, msg_len)); + check(hal_hash_finalize(state, Q, n)); + + /* append checksum */ + *(uint16_t *)&Q[n] = u16str(Cksm((uint8_t *)Q, key->lmots)); + + bytestring32 y[p]; + +// for ( i = 0; i < p; i = i + 1 ) { + for (size_t i = 0; i < p; ++i) { + +// a = coef(Q || Cksm(Q), i, w) + uint8_t a = coef(Q, i); + +// tmp = x[i] + bytestring32 tmp; + memcpy(&tmp, &key->x[i], sizeof(tmp)); + +// for ( j = 0; j < a; j = j + 1 ) { + for (size_t j = 0; j < (size_t)a; ++j) { + +// tmp = H(I || u32str(q) || u16str(i) || u8str(j) || tmp) + check(hal_hash_initialize(NULL, hal_hash_sha256, &state, statebuf, sizeof(statebuf))); + check(hal_hash_update(state, (const uint8_t *)&key->I, sizeof(key->I))); + l = u32str(key->q); check(hal_hash_update(state, (const uint8_t *)&l, sizeof(l))); + s = u16str(i); check(hal_hash_update(state, (const uint8_t *)&s, sizeof(s))); + b = u8str(j); check(hal_hash_update(state, (const uint8_t *)&b, sizeof(b))); + check(hal_hash_update(state, (const uint8_t *)&tmp, sizeof(tmp))); + check(hal_hash_finalize(state, (uint8_t *)&tmp, sizeof(tmp))); +// } + } + +// y[i] = tmp + memcpy(&y[i], &tmp, sizeof(tmp)); + } + +// 6. return u32str(type) || C || y[0] || ... || y[p-1] + uint8_t *sigptr = sig; + const uint8_t * const siglim = sig + sig_max; + check(hal_xdr_encode_int(&sigptr, siglim, key->lmots->type)); + check(hal_xdr_encode_bytestring32(&sigptr, siglim, &C)); + for (size_t i = 0; i < p; ++i) + check(hal_xdr_encode_bytestring32(&sigptr, siglim, &y[i])); + + if (sig_len != NULL) + *sig_len = sigptr - sig; + + return HAL_OK; +} +#endif + +static hal_error_t lmots_public_key_candidate(const lmots_key_t * const key, + const uint8_t * const msg, const size_t msg_len, + const uint8_t * const sig, const size_t sig_len) +{ + if (key == NULL || msg == NULL || sig == NULL) + return HAL_ERROR_BAD_ARGUMENTS; + + /* Skip the length checks here, because we did a unitary length check + * at the start of lms_verify. + */ + +// 1. if the signature is not at least four bytes long, return INVALID +// +// 2. parse sigtype, C, and y from the signature as follows: +// a. sigtype = strTou32(first 4 bytes of signature) + + const uint8_t *sigptr = sig; + const uint8_t * const siglim = sig + sig_len; + + uint32_t sigtype; + check(hal_xdr_decode_int(&sigptr, siglim, &sigtype)); + +// b. if sigtype is not equal to pubtype, return INVALID + + if ((lmots_algorithm_t)sigtype != key->lmots->type) + return HAL_ERROR_INVALID_SIGNATURE; + +// c. set n and p according to the pubtype and Table 1; if the +// signature is not exactly 4 + n * (p+1) bytes long, return INVALID + + size_t n = key->lmots->n; + size_t p = key->lmots->p; + size_t w2 = key->lmots->w2; + uint8_t (*coef)() = key->lmots->coef; + +// d. C = next n bytes of signature + + bytestring32 C; + check(hal_xdr_decode_bytestring32(&sigptr, siglim, &C)); + +// e. y[0] = next n bytes of signature +// y[1] = next n bytes of signature +// ... +// y[p-1] = next n bytes of signature + + bytestring32 y[p]; + for (size_t i = 0; i < p; ++i) + check(hal_xdr_decode_bytestring32(&sigptr, siglim, &y[i])); + +// 3. compute the string Kc as follows + + uint8_t statebuf[512]; + hal_hash_state_t *state = NULL; + uint8_t Q[n + 2]; /* hash || 16-bit checksum */ + uint32_t l; + uint16_t s; + uint8_t b; + +// Q = H(I || u32str(q) || u16str(D_MESG) || C || message) + check(hal_hash_initialize(NULL, hal_hash_sha256, &state, statebuf, sizeof(statebuf))); + check(hal_hash_update(state, (const uint8_t *)&key->I, sizeof(key->I))); + l = u32str(key->q); check(hal_hash_update(state, (const uint8_t *)&l, sizeof(l))); + s = u16str(D_MESG); check(hal_hash_update(state, (const uint8_t *)&s, sizeof(s))); + check(hal_hash_update(state, (const uint8_t *)&C, sizeof(C))); + check(hal_hash_update(state, msg, msg_len)); + check(hal_hash_finalize(state, Q, n)); + + /* append checksum */ + *(uint16_t *)&Q[n] = u16str(Cksm((uint8_t *)Q, key->lmots)); + + bytestring32 z[p]; + +// for ( i = 0; i < p; i = i + 1 ) { + for (size_t i = 0; i < p; ++i) { + +// a = coef(Q || Cksm(Q), i, w) + uint8_t a = coef(Q, i); + +// tmp = y[i] + bytestring32 tmp; + memcpy(&tmp, &y[i], sizeof(tmp)); + +// for ( j = a; j < 2^w - 1; j = j + 1 ) { + for (size_t j = (size_t)a; j < w2 - 1; ++j) { + +// tmp = H(I || u32str(q) || u16str(i) || u8str(j) || tmp) + check(hal_hash_initialize(NULL, hal_hash_sha256, &state, statebuf, sizeof(statebuf))); + check(hal_hash_update(state, (const uint8_t *)&key->I, sizeof(key->I))); + l = u32str(key->q); check(hal_hash_update(state, (const uint8_t *)&l, sizeof(l))); + s = u16str(i); check(hal_hash_update(state, (const uint8_t *)&s, sizeof(s))); + b = u8str(j); check(hal_hash_update(state, (const uint8_t *)&b, sizeof(b))); + check(hal_hash_update(state, (const uint8_t *)&tmp, sizeof(tmp))); + check(hal_hash_finalize(state, (uint8_t *)&tmp, sizeof(tmp))); +// } + } + +// z[i] = tmp + memcpy(&z[i], &tmp, sizeof(tmp)); +// } + } + +// Kc = H(I || u32str(q) || u16str(D_PBLC) || z[0] || z[1] || ... || z[p-1]) + check(hal_hash_initialize(NULL, hal_hash_sha256, &state, statebuf, sizeof(statebuf))); + check(hal_hash_update(state, (const uint8_t *)&key->I, sizeof(key->I))); + l = u32str(key->q); check(hal_hash_update(state, (const uint8_t *)&l, sizeof(l))); + s = u16str(D_PBLC); check(hal_hash_update(state, (const uint8_t *)&s, sizeof(s))); + for (size_t i = 0; i < p; ++i) + check(hal_hash_update(state, (const uint8_t *)&z[i], sizeof(z[i]))); + check(hal_hash_finalize(state, (uint8_t *)&key->K, sizeof(key->K))); + +// 4. return Kc + return HAL_OK; +} + +#if RPC_CLIENT == RPC_CLIENT_LOCAL +static hal_error_t lmots_private_key_to_der(const lmots_key_t * const key, + uint8_t *der, size_t *der_len, const size_t der_max) +{ + if (key == NULL || key->type != HAL_KEY_TYPE_HASHSIG_LMOTS) + return HAL_ERROR_BAD_ARGUMENTS; + + // u32str(lmots_type) || I || u32str(q) || x[0] || x[1] || ... || x[p-1] + /* we also store K, to speed up restart */ + + /* + * Calculate data length. + */ + + size_t len, vlen = 0, hlen; + + check(hal_asn1_encode_lmots_algorithm(key->lmots->type, NULL, &len, 0)); vlen += len; + check(hal_asn1_encode_bytestring16(&key->I, NULL, &len, 0)); vlen += len; + check(hal_asn1_encode_size_t(key->q, NULL, &len, 0)); vlen += len; + for (size_t i = 0; i < key->lmots->p; ++i) { + check(hal_asn1_encode_bytestring32(&key->x[i], NULL, &len, 0)); vlen += len; + } + check(hal_asn1_encode_bytestring32(&key->K, NULL, &len, 0)); vlen += len; + + check(hal_asn1_encode_header(ASN1_SEQUENCE, vlen, NULL, &hlen, 0)); + + check(hal_asn1_encode_pkcs8_privatekeyinfo(hal_asn1_oid_mts_hashsig, hal_asn1_oid_mts_hashsig_len, + NULL, 0, NULL, hlen + vlen, NULL, der_len, der_max)); + + if (der == NULL) + return HAL_OK; + + /* + * Encode data. + */ + + check(hal_asn1_encode_header(ASN1_SEQUENCE, vlen, der, &hlen, der_max)); + + uint8_t *d = der + hlen; + memset(d, 0, vlen); + + check(hal_asn1_encode_lmots_algorithm(key->lmots->type, d, &len, vlen)); d += len; vlen -= len; + check(hal_asn1_encode_bytestring16(&key->I, d, &len, vlen)); d += len; vlen -= len; + check(hal_asn1_encode_size_t(key->q, d, &len, vlen)); d += len; vlen -= len; + for (size_t i = 0; i < key->lmots->p; ++i) { + check(hal_asn1_encode_bytestring32(&key->x[i], d, &len, vlen)); d += len; vlen -= len; + } + check(hal_asn1_encode_bytestring32(&key->K, d, &len, vlen)); d += len; vlen -= len; + + return hal_asn1_encode_pkcs8_privatekeyinfo(hal_asn1_oid_mts_hashsig, hal_asn1_oid_mts_hashsig_len, + NULL, 0, der, d - der, der, der_len, der_max); +} + +static size_t lmots_private_key_to_der_len(const lmots_key_t * const key) +{ + size_t len = 0; + return (lmots_private_key_to_der(key, NULL, &len, 0) == HAL_OK) ? len : 0; +} + +static hal_error_t lmots_private_key_from_der(lmots_key_t *key, + const uint8_t *der, const size_t der_len) +{ + if (key == NULL || der == NULL) + return HAL_ERROR_BAD_ARGUMENTS; + + key->type = HAL_KEY_TYPE_HASHSIG_LMOTS; + + size_t hlen, vlen, alg_oid_len, curve_oid_len, privkey_len; + const uint8_t *alg_oid, *curve_oid, *privkey; + + check(hal_asn1_decode_pkcs8_privatekeyinfo(&alg_oid, &alg_oid_len, + &curve_oid, &curve_oid_len, + &privkey, &privkey_len, + der, der_len)); + + if (alg_oid_len != hal_asn1_oid_mts_hashsig_len || + memcmp(alg_oid, hal_asn1_oid_mts_hashsig, alg_oid_len) != 0 || + curve_oid_len != 0) + return HAL_ERROR_ASN1_PARSE_FAILED; + + check(hal_asn1_decode_header(ASN1_SEQUENCE, privkey, privkey_len, &hlen, &vlen)); + + const uint8_t *d = privkey + hlen; + size_t len; + + // u32str(lmots_type) || I || u32str(q) || x[0] || x[1] || ... || x[p-1] + + lmots_algorithm_t lmots_type; + check(hal_asn1_decode_lmots_algorithm(&lmots_type, d, &len, vlen)); d += len; vlen -= len; + key->lmots = lmots_select_parameter_set(lmots_type); + check(hal_asn1_decode_bytestring16(&key->I, d, &len, vlen)); d += len; vlen -= len; + check(hal_asn1_decode_size_t(&key->q, d, &len, vlen)); d += len; vlen -= len; + for (size_t i = 0; i < key->lmots->p; ++i) { + check(hal_asn1_decode_bytestring32(&key->x[i], d, &len, vlen)); d += len; vlen -= len; + } + check(hal_asn1_decode_bytestring32(&key->K, d, &len, vlen)); d += len; vlen -= len; + + if (d != privkey + privkey_len) + return HAL_ERROR_ASN1_PARSE_FAILED; + + return HAL_OK; +} +#endif + +/* ---------------------------------------------------------------- */ + +/* + * LMS + */ + +typedef const struct lms_parameter_set { + lms_algorithm_t type; + size_t m, h, h2; +} lms_parameter_t; +static lms_parameter_t lms_parameters[] = { + { lms_sha256_n32_h5, 32, 5, 32 }, + { lms_sha256_n32_h10, 32, 10, 1024 }, + { lms_sha256_n32_h15, 32, 15, 32768 }, + { lms_sha256_n32_h20, 32, 20, 1048576 }, + { lms_sha256_n32_h25, 32, 25, 33554432 }, +}; + +typedef struct lms_key { + hal_key_type_t type; + size_t level; + lms_parameter_t *lms; + lmots_parameter_t *lmots; + bytestring16 I; + size_t q; /* index of next lmots signing key */ + hal_uuid_t *lmots_keys; /* private key components */ + bytestring32 *T; /* public key components */ + bytestring32 T1; /* copy of T[1] */ + uint8_t *pubkey; /* in XDR format */ + size_t pubkey_len; + uint8_t *signature; /* of public key by parent lms key */ + size_t signature_len; +} lms_key_t; + +static inline lms_parameter_t *lms_select_parameter_set(const lms_algorithm_t lms_type) +{ + if (lms_type < lms_sha256_n32_h5 || lms_type > lms_sha256_n32_h25) + return NULL; + else + return &lms_parameters[lms_type - lms_sha256_n32_h5]; +} + +static inline size_t lms_public_key_len(lms_parameter_t * const lms) +{ + /* u32str(type) || u32str(otstype) || I || T[1] */ + return 2 * sizeof(uint32_t) + 16 + lms->m; +} + +static inline size_t lms_signature_len(lms_parameter_t * const lms, lmots_parameter_t * const lmots) +{ + /* u32str(q) || ots_signature || u32str(type) || path[0] || path[1] || ... || path[h-1] */ + return 2 * sizeof(uint32_t) + lmots_signature_len(lmots) + lms->h * lms->m; +} + +#if RPC_CLIENT == RPC_CLIENT_LOCAL +/* Given a key with most fields filled in, generate the lms private and + * public key components. + * Let the caller worry about storage. + */ +static hal_error_t lms_generate(lms_key_t *key) +{ + if (key == NULL || key->type != HAL_KEY_TYPE_HASHSIG_LMS || key->lms == NULL || key->lmots == NULL || key->lmots_keys == NULL || key->T == NULL) + return HAL_ERROR_BAD_ARGUMENTS; + + check(hal_uuid_gen((hal_uuid_t *)&key->I)); + key->q = 0; + + bytestring32 x[key->lmots->p]; + lmots_key_t lmots_key = { + .type = HAL_KEY_TYPE_HASHSIG_LMOTS, + .lmots = key->lmots, + .x = x + }; + memcpy(&lmots_key.I, &key->I, sizeof(key->I)); + + hal_pkey_slot_t slot = { + .type = HAL_KEY_TYPE_HASHSIG_LMOTS, + .curve = HAL_CURVE_NONE, + .flags = (key->level == 0) ? HAL_KEY_FLAG_TOKEN: 0 + }; + hal_ks_t *ks = (key->level == 0) ? hal_ks_token : hal_ks_volatile; + + uint8_t statebuf[512]; + hal_hash_state_t *state = NULL; + uint32_t l; + uint16_t s; + + size_t h2 = key->lms->h2; + + /* private key - array of lmots key names */ + for (size_t q = 0; q < h2; ++q) { + /* generate the lmots private and public key components */ + lmots_key.q = q; + check(lmots_generate(&lmots_key)); + + /* store the lmots key */ + uint8_t der[lmots_private_key_to_der_len(&lmots_key)]; + size_t der_len; + check(lmots_private_key_to_der(&lmots_key, der, &der_len, sizeof(der))); + check(hal_uuid_gen(&slot.name)); + hal_error_t err = hal_ks_store(ks, &slot, der, der_len); + memset(&x, 0, sizeof(x)); + memset(der, 0, sizeof(der)); + if (err != HAL_OK) return err; + + /* record the lmots keystore name */ + memcpy(&key->lmots_keys[q], &slot.name, sizeof(slot.name)); + + /* compute T[r] = H(I || u32str(r) || u16str(D_LEAF) || OTS_PUB[r-2^h]) */ + size_t r = h2 + q; + check(hal_hash_initialize(NULL, hal_hash_sha256, &state, statebuf, sizeof(statebuf))); + check(hal_hash_update(state, (const uint8_t *)&key->I, sizeof(key->I))); + l = u32str(r); check(hal_hash_update(state, (const uint8_t *)&l, sizeof(l))); + s = u16str(D_LEAF); check(hal_hash_update(state, (const uint8_t *)&s, sizeof(s))); + /* they say "OTS_PUB", but they really just mean K */ + check(hal_hash_update(state, (const uint8_t *)&lmots_key.K, sizeof(lmots_key.K))); + check(hal_hash_finalize(state, (uint8_t *)&key->T[r], sizeof(key->T[r]))); + } + + /* generate the rest of T[r] = H(I || u32str(r) || u16str(D_INTR) || T[2*r] || T[2*r+1]) */ + for (size_t r = h2 - 1; r > 0; --r) { + check(hal_hash_initialize(NULL, hal_hash_sha256, &state, statebuf, sizeof(statebuf))); + check(hal_hash_update(state, (const uint8_t *)&key->I, sizeof(key->I))); + l = u32str(r); check(hal_hash_update(state, (const uint8_t *)&l, sizeof(l))); + s = u16str(D_INTR); check(hal_hash_update(state, (const uint8_t *)&s, sizeof(s))); + check(hal_hash_update(state, (const uint8_t *)&key->T[2*r], sizeof(key->T[r]))); + check(hal_hash_update(state, (const uint8_t *)&key->T[2*r+1], sizeof(key->T[r]))); + check(hal_hash_finalize(state, (uint8_t *)&key->T[r], sizeof(key->T[r]))); + } + + memcpy(&key->T1, &key->T[1], sizeof(key->T1)); + + /* generate the XDR encoding of the public key, which will be signed + * by the previous lms key + */ + uint8_t *pubkey = key->pubkey; + const uint8_t * const publim = key->pubkey + key->pubkey_len; + // u32str(lms_type) || u32str(lmots_type) || I || T[1] + check(hal_xdr_encode_int(&pubkey, publim, key->lms->type)); + check(hal_xdr_encode_int(&pubkey, publim, key->lmots->type)); + check(hal_xdr_encode_bytestring16(&pubkey, publim, &key->I)); + check(hal_xdr_encode_bytestring32(&pubkey, publim, &key->T1)); + + return HAL_OK; +} + +static hal_error_t lms_delete(const lms_key_t * const key) +{ + hal_pkey_slot_t slot; + memset(&slot, 0, sizeof(slot)); + slot.flags = (key->level == 0) ? HAL_KEY_FLAG_TOKEN: 0; + + hal_ks_t *ks = (key->level == 0) ? hal_ks_token : hal_ks_volatile; + + /* delete the lmots keys */ + for (size_t i = 0; i < key->lms->h2; ++i) { + memcpy(&slot.name, &key->lmots_keys[i], sizeof(slot.name)); + check(hal_ks_delete(ks, &slot)); + } + + /* delete the lms key */ + memcpy(&slot.name, &key->I, sizeof(slot.name)); + return hal_ks_delete(ks, &slot); +} + +static hal_error_t lms_private_key_to_der(const lms_key_t * const key, + uint8_t *der, size_t *der_len, const size_t der_max); + +static hal_error_t lms_sign(lms_key_t * const key, + const uint8_t * const msg, const size_t msg_len, + uint8_t *sig, size_t *sig_len, const size_t sig_max) +{ + if (key == NULL || key->type != HAL_KEY_TYPE_HASHSIG_LMS || msg == NULL || sig == NULL) + return HAL_ERROR_BAD_ARGUMENTS; + + if (key->q >= key->lms->h2) + return HAL_ERROR_HASHSIG_KEY_EXHAUSTED; + + if (sig_max < lms_signature_len(key->lms, key->lmots)) + return HAL_ERROR_RESULT_TOO_LONG; + + /* u32str(q) || ots_signature || u32str(lms_type) || path[0] || path[1] || ... || path[h-1] */ + + uint8_t *sigptr = sig; + const uint8_t * const siglim = sig + sig_max; + check(hal_xdr_encode_int(&sigptr, siglim, key->q)); + + /* fetch and decode the lmots signing key from the keystore */ + hal_pkey_slot_t slot; + memset(&slot, 0, sizeof(slot)); + slot.flags = (key->level == 0) ? HAL_KEY_FLAG_TOKEN : 0; + memcpy(&slot.name, &key->lmots_keys[key->q], sizeof(slot.name)); + + lmots_key_t lmots_key; + memset(&lmots_key, 0, sizeof(lmots_key)); + bytestring32 x[key->lmots->p]; + memset(&x, 0, sizeof(x)); + lmots_key.x = x; + + uint8_t der[HAL_KS_WRAPPED_KEYSIZE]; + size_t der_len; + hal_ks_t *ks = (key->level == 0) ? hal_ks_token : hal_ks_volatile; + check(hal_ks_fetch(ks, &slot, der, &der_len, sizeof(der))); + check(lmots_private_key_from_der(&lmots_key, der, der_len)); + memset(&der, 0, sizeof(der)); + + //? check lmots_type and I vs. lms key? + + /* generate the lmots signature */ + size_t lmots_sig_len; + check(lmots_sign(&lmots_key, msg, msg_len, sigptr, &lmots_sig_len, sig_max - (sigptr - sig))); + memset(&x, 0, sizeof(x)); + sigptr += lmots_sig_len; + + check(hal_xdr_encode_int(&sigptr, siglim, key->lms->type)); + + /* generate the path array */ + for (size_t r = key->lms->h2 + key->q; r > 1; r /= 2) + check(hal_xdr_encode_bytestring32(&sigptr, siglim, ((r & 1) ? &key->T[r-1] : &key->T[r+1]))); + + if (sig_len != NULL) + *sig_len = sigptr - sig; + + /* update and store q before returning the signature */ + ++key->q; + check(lms_private_key_to_der(key, der, &der_len, sizeof(der))); + memcpy(&slot.name, &key->I, sizeof(slot.name)); + check(hal_ks_rewrite_der(ks, &slot, der, der_len)); + + return HAL_OK; +} +#endif + +static hal_error_t lms_public_key_candidate(const lms_key_t * const key, + const uint8_t * const msg, const size_t msg_len, + const uint8_t * const sig, const size_t sig_len, + bytestring32 * Tc); + +static hal_error_t lms_verify(const lms_key_t * const key, + const uint8_t * const msg, const size_t msg_len, + const uint8_t * const sig, const size_t sig_len) +{ + if (key == NULL || msg == NULL || sig == NULL) + return HAL_ERROR_BAD_ARGUMENTS; + + /* We can do one length check right now, rather than the 3 in + * Algorithm 6b and 2 in Algorithm 4b, because the lms and lmots types + * in the signature have to match the key. + */ + if (sig_len != lms_signature_len(key->lms, key->lmots)) + return HAL_ERROR_INVALID_SIGNATURE; + +// Algorithm 6: LMS Signature Verification + +// 1. if the public key is not at least four bytes long, return +// INVALID +// +// 2. parse pubtype, I, and T[1] from the public key as follows: +// +// a. pubtype = strTou32(first 4 bytes of public key) +// +// b. set m according to pubtype, based on Table 2 +// +// c. if the public key is not exactly 20 + m bytes +// long, return INVALID + + /* XXX THIS IS WRONG, should be 24 + m */ + + /* XXX missing from draft: pubotstype = strTou32(next 4 bytes of public key) */ + +// +// d. I = next 16 bytes of the public key +// +// e. T[1] = next m bytes of the public key +// +// 3. compute the candidate LMS root value Tc from the signature, +// message, identifier and pubtype using Algorithm 6b. + /* XXX and pubotstype */ + + bytestring32 Tc; + check(lms_public_key_candidate(key, msg, msg_len, sig, sig_len, &Tc)); + +// 4. if Tc is equal to T[1], return VALID; otherwise, return INVALID + + return (memcmp(&Tc, &key->T1, sizeof(Tc)) ? HAL_ERROR_INVALID_SIGNATURE : HAL_OK); +} + +static hal_error_t lms_public_key_candidate(const lms_key_t * const key, + const uint8_t * const msg, const size_t msg_len, + const uint8_t * const sig, const size_t sig_len, + bytestring32 * Tc) +{ +// Algorithm 6b: Computing an LMS Public Key Candidate from a Signature, +// Message, Identifier, and algorithm typecode + /* XXX and pubotstype */ + +// 1. if the signature is not at least eight bytes long, return INVALID +// +// 2. parse sigtype, q, ots_signature, and path from the signature as +// follows: +// +// a. q = strTou32(first 4 bytes of signature) + + const uint8_t *sigptr = sig; + const uint8_t * const siglim = sig + sig_len; + + uint32_t q; + check(hal_xdr_decode_int(&sigptr, siglim, &q)); + +// b. otssigtype = strTou32(next 4 bytes of signature) + + uint32_t otssigtype; + check(hal_xdr_decode_int_peek(&sigptr, siglim, &otssigtype)); + +// c. if otssigtype is not the OTS typecode from the public key, return INVALID + + if ((lmots_algorithm_t)otssigtype != key->lmots->type) + return HAL_ERROR_INVALID_SIGNATURE; + +// d. set n, p according to otssigtype and Table 1; if the +// signature is not at least 12 + n * (p + 1) bytes long, return INVALID +// +// e. ots_signature = bytes 8 through 8 + n * (p + 1) - 1 of signature + + /* XXX Technically, this is also wrong - this is the remainder of + * ots_signature after otssigtype. The full ots_signature would be + * bytes 4 through 8 + n * (p + 1) - 1. + */ + + const uint8_t * const ots_signature = sigptr; + sigptr += lmots_signature_len(key->lmots); + +// f. sigtype = strTou32(4 bytes of signature at location 8 + n * (p + 1)) + + uint32_t sigtype; + check(hal_xdr_decode_int(&sigptr, siglim, &sigtype)); + +// f. if sigtype is not the LM typecode from the public key, return INVALID + + if ((lms_algorithm_t)sigtype != key->lms->type) + return HAL_ERROR_INVALID_SIGNATURE; + +// g. set m, h according to sigtype and Table 2 + + size_t m = key->lms->m; + size_t h = key->lms->h; + size_t h2 = key->lms->h2; + +// h. if q >= 2^h or the signature is not exactly 12 + n * (p + 1) + m * h bytes long, return INVALID + + if (q >= h2) + return HAL_ERROR_INVALID_SIGNATURE; + +// i. set path as follows: +// path[0] = next m bytes of signature +// path[1] = next m bytes of signature +// ... +// path[h-1] = next m bytes of signature + + bytestring32 path[h]; + for (size_t i = 0; i < h; ++i) + check(hal_xdr_decode_bytestring32(&sigptr, siglim, &path[i])); + +// 3. Kc = candidate public key computed by applying Algorithm 4b +// to the signature ots_signature, the message, and the +// identifiers I, q + + lmots_key_t lmots_key = { + .type = HAL_KEY_TYPE_HASHSIG_LMOTS, + .lmots = key->lmots, + .q = q + }; + memcpy(&lmots_key.I, &key->I, sizeof(lmots_key.I)); + check(lmots_public_key_candidate(&lmots_key, msg, msg_len, ots_signature, lmots_signature_len(key->lmots))); + +// 4. compute the candidate LMS root value Tc as follows: + + uint8_t statebuf[512]; + hal_hash_state_t *state = NULL; + uint32_t l; + uint16_t s; + +// node_num = 2^h + q + size_t r = h2 + q; + +// tmp = H(I || u32str(node_num) || u16str(D_LEAF) || Kc) + bytestring32 tmp; + check(hal_hash_initialize(NULL, hal_hash_sha256, &state, statebuf, sizeof(statebuf))); + check(hal_hash_update(state, (const uint8_t *)&lmots_key.I, sizeof(lmots_key.I))); + l = u32str(r); check(hal_hash_update(state, (const uint8_t *)&l, sizeof(l))); + s = u16str(D_LEAF); check(hal_hash_update(state, (const uint8_t *)&s, sizeof(s))); + check(hal_hash_update(state, (const uint8_t *)&lmots_key.K, sizeof(lmots_key.K))); + check(hal_hash_finalize(state, (uint8_t *)&tmp, sizeof(tmp))); + +// i = 0 +// while (node_num > 1) { +// if (node_num is odd): +// tmp = H(I || u32str(node_num/2) || u16str(D_INTR) || path[i] || tmp) +// else: +// tmp = H(I || u32str(node_num/2) || u16str(D_INTR) || tmp || path[i]) +// node_num = node_num/2 +// i = i + 1 +// } + for (size_t i = 0; r > 1; r /= 2, ++i) { + check(hal_hash_initialize(NULL, hal_hash_sha256, &state, statebuf, sizeof(statebuf))); + check(hal_hash_update(state, (const uint8_t *)&key->I, sizeof(key->I))); + l = u32str(r/2); check(hal_hash_update(state, (const uint8_t *)&l, sizeof(l))); + s = u16str(D_INTR); check(hal_hash_update(state, (const uint8_t *)&s, sizeof(s))); + if (r & 1) { + check(hal_hash_update(state, (const uint8_t *)&path[i], m)); + check(hal_hash_update(state, (const uint8_t *)&tmp, sizeof(tmp))); + } + else { + check(hal_hash_update(state, (const uint8_t *)&tmp, sizeof(tmp))); + check(hal_hash_update(state, (const uint8_t *)&path[i], m)); + } + check(hal_hash_finalize(state, (uint8_t *)&tmp, sizeof(tmp))); + } + +// Tc = tmp + memcpy(Tc, &tmp, sizeof(*Tc)); + + return HAL_OK; +} + +#if RPC_CLIENT == RPC_CLIENT_LOCAL +static hal_error_t lms_private_key_to_der(const lms_key_t * const key, + uint8_t *der, size_t *der_len, const size_t der_max) +{ + if (key == NULL || key->type != HAL_KEY_TYPE_HASHSIG_LMS) + return HAL_ERROR_BAD_ARGUMENTS; + + /* + * Calculate data length. + */ + + // u32str(lms_type) || u32str(lmots_type) || I || q + + size_t len, vlen = 0, hlen; + + check(hal_asn1_encode_lms_algorithm(key->lms->type, NULL, &len, 0)); vlen += len; + check(hal_asn1_encode_lmots_algorithm(key->lmots->type, NULL, &len, 0)); vlen += len; + check(hal_asn1_encode_bytestring16(&key->I, NULL, &len, 0)); vlen += len; + check(hal_asn1_encode_size_t(key->q, NULL, &len, 0)); vlen += len; + + check(hal_asn1_encode_header(ASN1_SEQUENCE, vlen, NULL, &hlen, 0)); + + check(hal_asn1_encode_pkcs8_privatekeyinfo(hal_asn1_oid_mts_hashsig, hal_asn1_oid_mts_hashsig_len, + NULL, 0, NULL, hlen + vlen, NULL, der_len, der_max)); + + if (der == NULL) + return HAL_OK; + + /* + * Encode data. + */ + + check(hal_asn1_encode_header(ASN1_SEQUENCE, vlen, der, &hlen, der_max)); + + uint8_t *d = der + hlen; + memset(d, 0, vlen); + + check(hal_asn1_encode_lms_algorithm(key->lms->type, d, &len, vlen)); d += len; vlen -= len; + check(hal_asn1_encode_lmots_algorithm(key->lmots->type, d, &len, vlen)); d += len; vlen -= len; + check(hal_asn1_encode_bytestring16(&key->I, d, &len, vlen)); d += len; vlen -= len; + check(hal_asn1_encode_size_t(key->q, d, &len, vlen)); d += len; vlen -= len; + + return hal_asn1_encode_pkcs8_privatekeyinfo(hal_asn1_oid_mts_hashsig, hal_asn1_oid_mts_hashsig_len, + NULL, 0, der, d - der, der, der_len, der_max); +} + +static size_t lms_private_key_to_der_len(const lms_key_t * const key) +{ + size_t len = 0; + return lms_private_key_to_der(key, NULL, &len, 0) == HAL_OK ? len : 0; +} +#endif + +#if 0 +// used in restart - caller will have to allocate and attach storage for lmots_keys[] and T[] +static hal_error_t lms_private_key_from_der(lms_key_t *key, + const uint8_t *der, const size_t der_len) +{ + if (key == NULL || der == NULL) + return HAL_ERROR_BAD_ARGUMENTS; + + key->type = HAL_KEY_TYPE_HASHSIG_LMS; + + size_t hlen, vlen, alg_oid_len, curve_oid_len, privkey_len; + const uint8_t *alg_oid, *curve_oid, *privkey; + + check(hal_asn1_decode_pkcs8_privatekeyinfo(&alg_oid, &alg_oid_len, + &curve_oid, &curve_oid_len, + &privkey, &privkey_len, + der, der_len)); + + if (alg_oid_len != hal_asn1_oid_mts_hashsig_len || + memcmp(alg_oid, hal_asn1_oid_mts_hashsig, alg_oid_len) != 0 || + curve_oid_len != 0) + return HAL_ERROR_ASN1_PARSE_FAILED; + + check(hal_asn1_decode_header(ASN1_SEQUENCE, privkey, privkey_len, &hlen, &vlen)); + + const uint8_t *d = privkey + hlen; + size_t n; + + // u32str(lms_type) || u32str(lmots_type) || I || q + + lms_algorithm_t lms_type; + check(hal_asn1_decode_lms_algorithm(&lms_type, d, &n, vlen)); d += n; vlen -= n; + key->lms = lms_select_parameter_set(lms_type); + lmots_algorithm_t lmots_type; + check(hal_asn1_decode_lmots_algorithm(&lmots_type, d, &n, vlen)); d += n; vlen -= n; + key->lmots = lmots_select_parameter_set(lmots_type); + check(hal_asn1_decode_bytestring16(&key->I, d, &n, vlen)); d += n; vlen -= n; + check(hal_asn1_decode_size_t(&key->q, d, &n, vlen)); d += n; vlen -= n; + + if (d != privkey + privkey_len) + return HAL_ERROR_ASN1_PARSE_FAILED; + + return HAL_OK; +} +#endif + +/* ---------------------------------------------------------------- */ + +/* + * HSS + */ + +/* For purposes of the external API, the key type is "hal_hashsig_key_t". + * Internally, we refer to it as "hss_key_t". + */ + +typedef struct hal_hashsig_key hss_key_t; + +struct hal_hashsig_key { + hal_key_type_t type; + hss_key_t *next; + size_t L; + lms_parameter_t *lms; + lmots_parameter_t *lmots; + bytestring16 I; + bytestring32 T1; + lms_key_t *lms_keys; +}; + +const size_t hal_hashsig_key_t_size = sizeof(hss_key_t); + +static hss_key_t *hss_keys = NULL; + +static inline size_t hss_public_key_len(lms_parameter_t * const lms) +{ + /* L || pub[0] */ + return sizeof(uint32_t) + lms_public_key_len(lms); +} + +static inline size_t hss_signature_len(const size_t L, lms_parameter_t * const lms, lmots_parameter_t * const lmots) +{ + /* u32str(Nspk) || sig[0] || pub[1] || ... || sig[Nspk-1] || pub[Nspk] || sig[Nspk] */ + return sizeof(uint32_t) + L * lms_signature_len(lms, lmots) + (L - 1) * lms_public_key_len(lms); +} + +size_t hal_hashsig_signature_len(const size_t L, + const lms_algorithm_t lms_type, + const lmots_algorithm_t lmots_type) +{ + lms_parameter_t * const lms = lms_select_parameter_set(lms_type); + if (lms == NULL) + return 0; + + lmots_parameter_t * const lmots = lmots_select_parameter_set(lmots_type); + if (lmots == NULL) + return 0; + + return hss_signature_len(L, lms, lmots); +} + +size_t hal_hashsig_lmots_private_key_len(const lmots_algorithm_t lmots_type) +{ + lmots_parameter_t * const lmots = lmots_select_parameter_set(lmots_type); + if (lmots == NULL) + return 0; + + return lmots_private_key_len(lmots); +} + +#if RPC_CLIENT == RPC_CLIENT_LOCAL +static inline void *gnaw(uint8_t **mem, size_t *len, const size_t size) +{ + if (mem == NULL || *mem == NULL || len == NULL || size > *len) + return NULL; + void *ret = *mem; + *mem += size; + *len -= size; + return ret; +} + +/* called from pkey_local_generate_hashsig */ +hal_error_t hal_hashsig_key_gen(hal_core_t *core, + hal_hashsig_key_t **key_, + const size_t L, + const lms_algorithm_t lms_type, + const lmots_algorithm_t lmots_type) +{ + if (key_ == NULL) + return HAL_ERROR_BAD_ARGUMENTS; + + if (L == 0 || L > 8) + return HAL_ERROR_BAD_ARGUMENTS; + + lms_parameter_t *lms = lms_select_parameter_set(lms_type); + if (lms == NULL) + return HAL_ERROR_BAD_ARGUMENTS; + + lmots_parameter_t *lmots = lmots_select_parameter_set(lmots_type); + if (lmots == NULL) + return HAL_ERROR_BAD_ARGUMENTS; + + /* w=1 fails on the Alpha, because the key exceeds the keystore block + * size. The XDR encoding of the key is going to differ from the DER + * encoding, but it's at least in the ballpark to tell us whether the key + * will fit. + */ + if (lmots_private_key_len(lmots) > HAL_KS_BLOCK_SIZE) + return HAL_ERROR_UNSUPPORTED_KEY; + + /* w=2 fails on the Alpha, as does w=4 with L=2, because the signature + * exceeds the meagre 4096-byte RPC packet size. + */ + if (hss_signature_len(L, lms, lmots) > HAL_RPC_MAX_PKT_SIZE) + return HAL_ERROR_UNSUPPORTED_KEY; + + /* check flash keystore for space to store the root tree */ + size_t available; + check(hal_ks_available(hal_ks_token, &available)); + if (available < lms->h2 + 2) + return HAL_ERROR_NO_KEY_INDEX_SLOTS; + + /* check volatile keystore for space to store the lower-level trees */ + check(hal_ks_available(hal_ks_volatile, &available)); + if (available < (L - 1) * (lms->h2 + 1)) + return HAL_ERROR_NO_KEY_INDEX_SLOTS; + + size_t lms_sig_len = lms_signature_len(lms, lmots); + size_t lms_pub_len = lms_public_key_len(lms); + + /* allocate lms tree nodes and lmots key names, atomically */ + size_t len = (sizeof(hss_key_t) + + L * sizeof(lms_key_t) + + L * lms_sig_len + + L * lms_pub_len + + L * lms->h2 * sizeof(hal_uuid_t) + + L * (2 * lms->h2 - 1) * sizeof(bytestring32)); + uint8_t *mem = hal_allocate_static_memory(len); + if (mem == NULL) + return HAL_ERROR_ALLOCATION_FAILURE; + memset(mem, 0, len); + + /* allocate the key that will stay in working memory */ + hss_key_t *key = gnaw(&mem, &len, sizeof(hss_key_t)); + key->type = HAL_KEY_TYPE_HASHSIG_PRIVATE; + key->L = L; + key->lms = lms; + key->lmots = lmots; + + /* add to the list of active keys */ + key->next = hss_keys; + hss_keys = key; + + /* allocate the list of lms trees */ + key->lms_keys = gnaw(&mem, &len, L * sizeof(lms_key_t)); + + /* generate the lms trees */ + for (size_t i = 0; i < L; ++i) { + lms_key_t * lms_key = &key->lms_keys[i]; + lms_key->type = HAL_KEY_TYPE_HASHSIG_LMS; + lms_key->lms = lms; + lms_key->lmots = lmots; + lms_key->level = i; + lms_key->lmots_keys = (hal_uuid_t *)gnaw(&mem, &len, lms->h2 * sizeof(hal_uuid_t)); + lms_key->T = gnaw(&mem, &len, (2 * lms->h2 - 1) * sizeof(bytestring32)); + lms_key->signature = gnaw(&mem, &len, lms_sig_len); + lms_key->signature_len = lms_sig_len; + lms_key->pubkey = gnaw(&mem, &len, lms_pub_len); + lms_key->pubkey_len = lms_pub_len; + + check(lms_generate(lms_key)); + + if (i > 0) + /* sign this tree with the previous */ + check(lms_sign(&key->lms_keys[i-1], + (const uint8_t * const)lms_key->pubkey, lms_pub_len, + lms_key->signature, NULL, lms_sig_len)); + + /* store the lms key */ + hal_pkey_slot_t slot = { + .type = HAL_KEY_TYPE_HASHSIG_LMS, + .curve = HAL_CURVE_NONE, + .flags = (i == 0) ? HAL_KEY_FLAG_TOKEN: 0 + }; + hal_ks_t *ks = (i == 0) ? hal_ks_token : hal_ks_volatile; + uint8_t der[lms_private_key_to_der_len(lms_key)]; + size_t der_len; + + memcpy(&slot.name, &lms_key->I, sizeof(slot.name)); + check(lms_private_key_to_der(lms_key, der, &der_len, sizeof(der))); + check(hal_ks_store(ks, &slot, der, der_len)); + } + + memcpy(&key->I, &key->lms_keys[0].I, sizeof(key->I)); + memcpy(&key->T1, &key->lms_keys[0].T1, sizeof(key->T1)); + + *key_ = key; + + /* pkey_local_generate_hashsig stores the key */ + + return HAL_OK; +} + +hal_error_t hal_hashsig_key_delete(const hal_hashsig_key_t * const key) +{ + if (key == NULL || key->type != HAL_KEY_TYPE_HASHSIG_PRIVATE) + return HAL_ERROR_BAD_ARGUMENTS; + + /* delete the lms trees and their lmots keys */ + for (size_t level = 0; level < key->L; ++level) + check(lms_delete(&key->lms_keys[level])); + + /* XXX free memory, if supported */ + + /* remove from global hss_keys linked list */ + /* XXX or mark it unused, for possible re-use */ + if (hss_keys == key) { + hss_keys = key->next; + } + else { + for (hss_key_t *prev = hss_keys; prev != NULL; prev = prev->next) { + if (prev->next == key) { + prev->next = key->next; + break; + } + } + } + + return HAL_OK; +} + +hal_error_t hal_hashsig_sign(hal_core_t *core, + const hal_hashsig_key_t * const key, + const uint8_t * const msg, const size_t msg_len, + uint8_t *sig, size_t *sig_len, const size_t sig_max) +{ + if (key == NULL || key->type != HAL_KEY_TYPE_HASHSIG_PRIVATE || msg == NULL || sig == NULL || sig_len == NULL) + return HAL_ERROR_BAD_ARGUMENTS; + + if (sig_max < hss_signature_len(key->L, key->lms, key->lmots)) + return HAL_ERROR_RESULT_TOO_LONG; + +// To sign a message using the private key prv, the following steps are +// performed: +// +// If prv[L-1] is exhausted, then determine the smallest integer d +// such that all of the private keys prv[d], prv[d+1], ... , prv[L-1] +// are exhausted. If d is equal to zero, then the HSS key pair is +// exhausted, and it MUST NOT generate any more signatures. +// Otherwise, the key pairs for levels d through L-1 must be +// regenerated during the signature generation process, as follows. +// For i from d to L-1, a new LMS public and private key pair with a +// new identifier is generated, pub[i] and prv[i] are set to those +// values, then the public key pub[i] is signed with prv[i-1], and +// sig[i-1] is set to the resulting value. + + if (key->lms_keys[key->L-1].q >= key->lms->h2) { + size_t d; + for (d = key->L-1; d > 0 && key->lms_keys[d-1].q >= key->lms->h2; --d) { + } + if (d == 0) + return HAL_ERROR_HASHSIG_KEY_EXHAUSTED; + for ( ; d < key->L; ++d) { + lms_key_t *lms_key = &key->lms_keys[d]; + /* Delete then regenerate the LMS key. We don't worry about + * power-cycling in the middle, because the lower-level trees are + * all stored in the volatile keystore, so we'd have to regenerate + * them anyway on restart; and this way we don't have to allocate + * any additional memory. + */ + check(lms_delete(lms_key)); + check(lms_generate(lms_key)); + check(lms_sign(&key->lms_keys[d-1], + (const uint8_t * const)lms_key->pubkey, lms_key->pubkey_len, + lms_key->signature, NULL, lms_key->signature_len)); + + hal_pkey_slot_t slot = { + .type = HAL_KEY_TYPE_HASHSIG_LMS, + .curve = HAL_CURVE_NONE, + .flags = (lms_key->level == 0) ? HAL_KEY_FLAG_TOKEN: 0 + }; + hal_ks_t *ks = (lms_key->level == 0) ? hal_ks_token : hal_ks_volatile; + uint8_t der[lms_private_key_to_der_len(lms_key)]; + size_t der_len; + + memcpy(&slot.name, &lms_key->I, sizeof(slot.name)); + check(lms_private_key_to_der(lms_key, der, &der_len, sizeof(der))); + check(hal_ks_store(ks, &slot, der, der_len)); + } + } + +// The message is signed with prv[L-1], and the value sig[L-1] is set +// to that result. +// +// The value of the HSS signature is set as follows. We let +// signed_pub_key denote an array of octet strings, where +// signed_pub_key[i] = sig[i] || pub[i+1], for i between 0 and Nspk- +// 1, inclusive, where Nspk = L-1 denotes the number of signed public +// keys. Then the HSS signature is u32str(Nspk) || +// signed_pub_key[0] || ... || signed_pub_key[Nspk-1] || sig[Nspk]. + + uint8_t *sigptr = sig; + const uint8_t * const siglim = sig + sig_max; + check(hal_xdr_encode_int(&sigptr, siglim, key->L - 1)); + + /* copy the lms signed public keys into the signature */ + for (size_t i = 1; i < key->L; ++i) { + lms_key_t *lms_key = &key->lms_keys[i]; + check(hal_xdr_encode_fixed_opaque(&sigptr, siglim, lms_key->signature, lms_key->signature_len)); + check(hal_xdr_encode_fixed_opaque(&sigptr, siglim, lms_key->pubkey, lms_key->pubkey_len)); + } + + /* sign the message with the last lms private key */ + size_t len; + check(lms_sign(&key->lms_keys[key->L-1], msg, msg_len, sigptr, &len, sig_max - (sigptr - sig))); + sigptr += len; + *sig_len = sigptr - sig; + + return HAL_OK; +} +#endif + +hal_error_t hal_hashsig_verify(hal_core_t *core, + const hal_hashsig_key_t * const key, + const uint8_t * const msg, const size_t msg_len, + const uint8_t * const sig, const size_t sig_len) +{ + if (key == NULL || key->type != HAL_KEY_TYPE_HASHSIG_PUBLIC || msg == NULL || sig == NULL) + return HAL_ERROR_BAD_ARGUMENTS; + + core = core; + +// To verify a signature sig and message using the public key pub, the +// following steps are performed: +// +// The signature S is parsed into its components as follows: +// +// Nspk = strTou32(first four bytes of S) +// if Nspk+1 is not equal to the number of levels L in pub: +// return INVALID + + const uint8_t *sigptr = sig; + const uint8_t * const siglim = sig + sig_len; + + uint32_t Nspk; + check(hal_xdr_decode_int(&sigptr, siglim, &Nspk)); + if (Nspk + 1 != key->L) + return HAL_ERROR_INVALID_SIGNATURE; + +// key = pub +// for (i = 0; i < Nspk; i = i + 1) { +// sig = next LMS signature parsed from S +// msg = next LMS public key parsed from S +// if (lms_verify(msg, key, sig) != VALID): +// return INVALID +// key = msg +// } + + lms_key_t pub = { + .type = HAL_KEY_TYPE_HASHSIG_LMS, + .lms = key->lms, + .lmots = key->lmots + }; + memcpy(&pub.I, &key->I, sizeof(pub.I)); + memcpy(&pub.T1, &key->T1, sizeof(pub.T1)); + + for (size_t i = 0; i < Nspk; ++i) { + const uint8_t * const lms_sig = sigptr; + /* peek into the signature for the lmots and lms types */ + /* XXX The structure of the LMS signature makes this a bigger pain + * in the ass than necessary. + */ + /* skip over q */ + sigptr += 4; + /* read lmots_type out of the ots_signature */ + uint32_t lmots_type; + check(hal_xdr_decode_int_peek(&sigptr, siglim, &lmots_type)); + lmots_parameter_t *lmots = lmots_select_parameter_set((lmots_algorithm_t)lmots_type); + if (lmots == NULL) + return HAL_ERROR_INVALID_SIGNATURE; + /* skip over ots_signature */ + sigptr += lmots_signature_len(lmots); + /* read lms_type after ots_signature */ + uint32_t lms_type; + check(hal_xdr_decode_int(&sigptr, siglim, &lms_type)); + lms_parameter_t *lms = lms_select_parameter_set((lms_algorithm_t)lms_type); + if (lms == NULL) + return HAL_ERROR_INVALID_SIGNATURE; + /* skip over the path elements of the lms signature */ + sigptr += lms->h * lms->m; + /*XXX sigptr = lms_sig + lms_signature_len(lms, lmots); */ + + /* verify the signature over the bytestring version of the signed public key */ + check(lms_verify(&pub, sigptr, lms_public_key_len(lms), lms_sig, sigptr - lms_sig)); + + /* parse the signed public key */ + check(hal_xdr_decode_int(&sigptr, siglim, &lms_type)); + pub.lms = lms_select_parameter_set((lmots_algorithm_t)lms_type); + if (pub.lms == NULL) + return HAL_ERROR_INVALID_SIGNATURE; + check(hal_xdr_decode_int(&sigptr, siglim, &lmots_type)); + pub.lmots = lmots_select_parameter_set((lmots_algorithm_t)lmots_type); + if (pub.lmots == NULL) + return HAL_ERROR_INVALID_SIGNATURE; + check(hal_xdr_decode_bytestring16(&sigptr, siglim, &pub.I)); + check(hal_xdr_decode_bytestring32(&sigptr, siglim, &pub.T1)); + } + + /* verify the final signature over the message */ + return lms_verify(&pub, msg, msg_len, sigptr, sig_len - (sigptr - sig)); +} + +hal_error_t hal_hashsig_private_key_to_der(const hal_hashsig_key_t * const key, + uint8_t *der, size_t *der_len, const size_t der_max) +{ + if (key == NULL || key->type != HAL_KEY_TYPE_HASHSIG_PRIVATE) + return HAL_ERROR_BAD_ARGUMENTS; + + /* + * Calculate data length. + */ + + size_t len, vlen = 0, hlen; + + check(hal_asn1_encode_size_t(key->L, NULL, &len, 0)); vlen += len; + check(hal_asn1_encode_lms_algorithm(key->lms->type, NULL, &len, 0)); vlen += len; + check(hal_asn1_encode_lmots_algorithm(key->lmots->type, NULL, &len, 0)); vlen += len; + check(hal_asn1_encode_uuid((hal_uuid_t *)&key->lms_keys[0].I, NULL, &len, 0)); vlen += len; + + check(hal_asn1_encode_header(ASN1_SEQUENCE, vlen, NULL, &hlen, 0)); + + check(hal_asn1_encode_pkcs8_privatekeyinfo(hal_asn1_oid_mts_hashsig, hal_asn1_oid_mts_hashsig_len, + NULL, 0, NULL, hlen + vlen, NULL, der_len, der_max)); + + if (der == NULL) + return HAL_OK; + + /* + * Encode data. + */ + + check(hal_asn1_encode_header(ASN1_SEQUENCE, vlen, der, &hlen, der_max)); + + uint8_t *d = der + hlen; + memset(d, 0, vlen); + + check(hal_asn1_encode_size_t(key->L, d, &len, vlen)); d += len; vlen -= len; + check(hal_asn1_encode_lms_algorithm(key->lms->type, d, &len, vlen)); d += len; vlen -= len; + check(hal_asn1_encode_lmots_algorithm(key->lmots->type, d, &len, vlen)); d += len; vlen -= len; + check(hal_asn1_encode_uuid((hal_uuid_t *)&key->lms_keys[0].I, d, &len, vlen)); d += len; vlen -= len; + + return hal_asn1_encode_pkcs8_privatekeyinfo(hal_asn1_oid_mts_hashsig, hal_asn1_oid_mts_hashsig_len, + NULL, 0, der, d - der, der, der_len, der_max); +} + +size_t hal_hashsig_private_key_to_der_len(const hal_hashsig_key_t * const key) +{ + size_t len = 0; + return hal_hashsig_private_key_to_der(key, NULL, &len, 0) == HAL_OK ? len : 0; +} + +hal_error_t hal_hashsig_private_key_from_der(hal_hashsig_key_t **key_, + void *keybuf, const size_t keybuf_len, + const uint8_t *der, const size_t der_len) +{ + if (key_ == NULL || keybuf == NULL || keybuf_len < sizeof(hal_hashsig_key_t) || der == NULL) + return HAL_ERROR_BAD_ARGUMENTS; + + memset(keybuf, 0, keybuf_len); + + hss_key_t *key = keybuf; + + key->type = HAL_KEY_TYPE_HASHSIG_PRIVATE; + + size_t hlen, vlen, alg_oid_len, curve_oid_len, privkey_len; + const uint8_t *alg_oid, *curve_oid, *privkey; + hal_error_t err; + + if ((err = hal_asn1_decode_pkcs8_privatekeyinfo(&alg_oid, &alg_oid_len, + &curve_oid, &curve_oid_len, + &privkey, &privkey_len, + der, der_len)) != HAL_OK) + return err; + + if (alg_oid_len != hal_asn1_oid_mts_hashsig_len || + memcmp(alg_oid, hal_asn1_oid_mts_hashsig, alg_oid_len) != 0 || + curve_oid_len != 0) + return HAL_ERROR_ASN1_PARSE_FAILED; + + if ((err = hal_asn1_decode_header(ASN1_SEQUENCE, privkey, privkey_len, &hlen, &vlen)) != HAL_OK) + return err; + + const uint8_t *d = privkey + hlen; + size_t n; + + check(hal_asn1_decode_size_t(&key->L, d, &n, vlen)); d += n; vlen -= n; + lms_algorithm_t lms_type; + check(hal_asn1_decode_lms_algorithm(&lms_type, d, &n, vlen)); d += n; vlen -= n; + key->lms = lms_select_parameter_set(lms_type); + lmots_algorithm_t lmots_type; + check(hal_asn1_decode_lmots_algorithm(&lmots_type, d, &n, vlen)); d += n; vlen -= n; + key->lmots = lmots_select_parameter_set(lmots_type); + hal_uuid_t I; + check(hal_asn1_decode_uuid(&I, d, &n, vlen)); d += n; vlen -= n; + + if (d != privkey + privkey_len) + return HAL_ERROR_ASN1_PARSE_FAILED; + + /* Find this key in the list of active hashsig keys, and return a + * pointer to that key structure, rather than the caller-provided key + * structure. (The caller will wipe his own key structure when done, + * and not molest ours.) + */ + for (hss_key_t *hss_key = hss_keys; hss_key != NULL; hss_key = hss_key->next) { + if (hal_uuid_cmp(&I, (hal_uuid_t *)&hss_key->lms_keys[0].I) == 0) { + *key_ = hss_key; + return HAL_OK; + } + } + return HAL_ERROR_KEY_NOT_FOUND; // or IMPOSSIBLE? +} + +hal_error_t hal_hashsig_public_key_to_der(const hal_hashsig_key_t * const key, + uint8_t *der, size_t *der_len, const size_t der_max) +{ + if (key == NULL || (key->type != HAL_KEY_TYPE_HASHSIG_PRIVATE && + key->type != HAL_KEY_TYPE_HASHSIG_PUBLIC)) + return HAL_ERROR_BAD_ARGUMENTS; + + // L || u32str(lms_type) || u32str(lmots_type) || I || T[1] + + size_t len, vlen = 0, hlen; + + check(hal_asn1_encode_size_t(key->L, NULL, &len, 0)); vlen += len; + check(hal_asn1_encode_lms_algorithm(key->lms->type, NULL, &len, 0)); vlen += len; + check(hal_asn1_encode_lmots_algorithm(key->lmots->type, NULL, &len, 0)); vlen += len; + check(hal_asn1_encode_bytestring16(&key->I, NULL, &len, 0)); vlen += len; + check(hal_asn1_encode_bytestring32(&key->T1, NULL, &len, 0)); vlen += len; + + check(hal_asn1_encode_header(ASN1_SEQUENCE, vlen, der, &hlen, der_max)); + + if (der != NULL) { + uint8_t *d = der + hlen; + size_t dlen = vlen; + memset(d, 0, vlen); + + check(hal_asn1_encode_size_t(key->L, d, &len, dlen)); d += len; dlen -= len; + check(hal_asn1_encode_lms_algorithm(key->lms->type, d, &len, dlen)); d += len; dlen -= len; + check(hal_asn1_encode_lmots_algorithm(key->lmots->type, d, &len, dlen)); d += len; dlen -= len; + check(hal_asn1_encode_bytestring16(&key->I, d, &len, dlen)); d += len; dlen -= len; + check(hal_asn1_encode_bytestring32(&key->T1, d, &len, dlen)); d += len; dlen -= len; + } + + return hal_asn1_encode_spki(hal_asn1_oid_mts_hashsig, hal_asn1_oid_mts_hashsig_len, + NULL, 0, der, hlen + vlen, + der, der_len, der_max); + +} + +size_t hal_hashsig_public_key_to_der_len(const hal_hashsig_key_t * const key) +{ + size_t len = 0; + return hal_hashsig_public_key_to_der(key, NULL, &len, 0) == HAL_OK ? len : 0; +} + +hal_error_t hal_hashsig_public_key_from_der(hal_hashsig_key_t **key_, + void *keybuf, const size_t keybuf_len, + const uint8_t * const der, const size_t der_len) +{ + if (key_ == NULL || keybuf == NULL || keybuf_len < sizeof(hss_key_t) || der == NULL) + return HAL_ERROR_BAD_ARGUMENTS; + + hss_key_t *key = keybuf; + + memset(keybuf, 0, keybuf_len); + *key_ = key; + + key->type = HAL_KEY_TYPE_HASHSIG_PUBLIC; + + const uint8_t *alg_oid = NULL, *null = NULL, *pubkey = NULL; + size_t alg_oid_len, null_len, pubkey_len; + + check(hal_asn1_decode_spki(&alg_oid, &alg_oid_len, &null, &null_len, &pubkey, &pubkey_len, der, der_len)); + + if (null != NULL || null_len != 0 || alg_oid == NULL || + alg_oid_len != hal_asn1_oid_mts_hashsig_len || memcmp(alg_oid, hal_asn1_oid_mts_hashsig, alg_oid_len) != 0) + return HAL_ERROR_ASN1_PARSE_FAILED; + + size_t len, hlen, vlen; + + check(hal_asn1_decode_header(ASN1_SEQUENCE, pubkey, pubkey_len, &hlen, &vlen)); + + const uint8_t * const pubkey_end = pubkey + hlen + vlen; + const uint8_t *d = pubkey + hlen; + + // L || u32str(lms_type) || u32str(lmots_type) || I || T[1] + + lms_algorithm_t lms_type; + lmots_algorithm_t lmots_type; + + check(hal_asn1_decode_size_t(&key->L, d, &len, pubkey_end - d)); d += len; + check(hal_asn1_decode_lms_algorithm(&lms_type, d, &len, pubkey_end - d)); d += len; + key->lms = lms_select_parameter_set(lms_type); + check(hal_asn1_decode_lmots_algorithm(&lmots_type, d, &len, pubkey_end - d)); d += len; + key->lmots = lmots_select_parameter_set(lmots_type); + check(hal_asn1_decode_bytestring16(&key->I, d, &len, pubkey_end - d)); d += len; + check(hal_asn1_decode_bytestring32(&key->T1, d, &len, pubkey_end - d)); d += len; + + if (d != pubkey_end) + return HAL_ERROR_ASN1_PARSE_FAILED; + + + return HAL_OK; +} + +hal_error_t hal_hashsig_key_load_public(hal_hashsig_key_t **key_, + void *keybuf, const size_t keybuf_len, + const size_t L, + const lms_algorithm_t lms_type, + const lmots_algorithm_t lmots_type, + const uint8_t * const I, const size_t I_len, + const uint8_t * const T1, const size_t T1_len) +{ + if (key_ == NULL || keybuf == NULL || keybuf_len < sizeof(hal_hashsig_key_t) || + I == NULL || I_len != sizeof(bytestring16) || + T1 == NULL || T1_len != sizeof(bytestring32)) + return HAL_ERROR_BAD_ARGUMENTS; + + memset(keybuf, 0, keybuf_len); + + hal_hashsig_key_t *key = keybuf; + + key->type = HAL_KEY_TYPE_HASHSIG_PUBLIC; + + key->L = L; + key->lms = lms_select_parameter_set(lms_type); + key->lmots = lmots_select_parameter_set(lmots_type); + if (key->lms == NULL || key->lmots == NULL) + return HAL_ERROR_BAD_ARGUMENTS; + + memcpy(&key->I, I, I_len); + memcpy(&key->T1, T1, T1_len); + + *key_ = key; + + return HAL_OK; +} + + +hal_error_t hal_hashsig_key_load_public_xdr(hal_hashsig_key_t **key_, + void *keybuf, const size_t keybuf_len, + const uint8_t * const xdr, const size_t xdr_len) +{ + const uint8_t *xdrptr = xdr; + const uint8_t * const xdrlim = xdr + xdr_len; + + /* L || u32str(lms_type) || u32str(lmots_type) || I || T[1] */ + + uint32_t L, lms_type, lmots_type; + bytestring16 *I; + bytestring32 *T1; + + check(hal_xdr_decode_int(&xdrptr, xdrlim, &L)); + check(hal_xdr_decode_int(&xdrptr, xdrlim, &lms_type)); + check(hal_xdr_decode_int(&xdrptr, xdrlim, &lmots_type)); + check(hal_xdr_decode_bytestring16_ptr(&xdrptr, xdrlim, &I)); + check(hal_xdr_decode_bytestring32_ptr(&xdrptr, xdrlim, &T1)); + + return hal_hashsig_key_load_public(key_, keybuf, keybuf_len, L, lms_type, lmots_type, + (const uint8_t * const)I, sizeof(bytestring16), + (const uint8_t * const)T1, sizeof(bytestring32)); +} diff --git a/hashsig.h b/hashsig.h new file mode 100644 index 0000000..aeb2828 --- /dev/null +++ b/hashsig.h @@ -0,0 +1,115 @@ +/* + * hashsig.c + * --------- + * Implementation of draft-mcgrew-hash-sigs-08.txt + * + * Copyright (c) 2018, NORDUnet A/S All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are + * met: + * - Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * + * - Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * - Neither the name of the NORDUnet nor the names of its contributors may + * be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS + * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED + * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A + * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED + * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF + * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING + * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS + * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#ifndef _HAL_HASHSIG_H_ +#define _HAL_HASHSIG_H_ + +typedef enum lmots_algorithm_type { + lmots_reserved = 0, + lmots_sha256_n32_w1 = 1, + lmots_sha256_n32_w2 = 2, + lmots_sha256_n32_w4 = 3, + lmots_sha256_n32_w8 = 4 +} lmots_algorithm_t; + +typedef enum lms_algorithm_type { + lms_reserved = 0, + lms_sha256_n32_h5 = 5, + lms_sha256_n32_h10 = 6, + lms_sha256_n32_h15 = 7, + lms_sha256_n32_h20 = 8, + lms_sha256_n32_h25 = 9 +} lms_algorithm_t; + +typedef struct hal_hashsig_key hal_hashsig_key_t; + +extern const size_t hal_hashsig_key_t_size; + +extern hal_error_t hal_hashsig_key_gen(hal_core_t *core, + hal_hashsig_key_t **key_, + const size_t hss_levels, + const lms_algorithm_t lms_type, + const lmots_algorithm_t lmots_type); + +extern hal_error_t hal_hashsig_key_delete(const hal_hashsig_key_t * const key); + +extern hal_error_t hal_hashsig_private_key_to_der(const hal_hashsig_key_t * const key, + uint8_t *der, size_t *der_len, const size_t der_max); + +extern size_t hal_hashsig_private_key_to_der_len(const hal_hashsig_key_t * const key); + +extern hal_error_t hal_hashsig_private_key_from_der(hal_hashsig_key_t **key_, + void *keybuf, const size_t keybuf_len, + const uint8_t *der, const size_t der_len); + +extern hal_error_t hal_hashsig_public_key_to_der(const hal_hashsig_key_t * const key, + uint8_t *der, size_t *der_len, const size_t der_max); + +extern size_t hal_hashsig_public_key_to_der_len(const hal_hashsig_key_t * const key); + +extern hal_error_t hal_hashsig_public_key_from_der(hal_hashsig_key_t **key, + void *keybuf, const size_t keybuf_len, + const uint8_t * const der, const size_t der_len); + +extern hal_error_t hal_hashsig_sign(hal_core_t *core, + const hal_hashsig_key_t * const key, + const uint8_t * const hash, const size_t hash_len, + uint8_t *signature, size_t *signature_len, const size_t signature_max); + +extern hal_error_t hal_hashsig_verify(hal_core_t *core, + const hal_hashsig_key_t * const key, + const uint8_t * const hash, const size_t hash_len, + const uint8_t * const signature, const size_t signature_len); + +extern hal_error_t hal_hashsig_key_load_public(hal_hashsig_key_t **key_, + void *keybuf, const size_t keybuf_len, + const size_t L, + const lms_algorithm_t lms_type, + const lmots_algorithm_t lmots_type, + const uint8_t * const I, const size_t I_len, + const uint8_t * const T1, const size_t T1_len); + +extern hal_error_t hal_hashsig_key_load_public_xdr(hal_hashsig_key_t **key_, + void *keybuf, const size_t keybuf_len, + const uint8_t * const xdr, const size_t xdr_len); + +extern size_t hal_hashsig_signature_len(const size_t L, + const lms_algorithm_t lms_type, + const lmots_algorithm_t lmots_type); + +extern size_t hal_hashsig_lmots_private_key_len(const lmots_algorithm_t lmots_type); + +//extern hal_error_t hal_hashsig_restart(...); + +#endif /* _HAL_HASHSIG_H_ */ @@ -514,6 +514,10 @@ static inline int acceptable_key_type(const hal_key_type_t type) case HAL_KEY_TYPE_EC_PRIVATE: case HAL_KEY_TYPE_RSA_PUBLIC: case HAL_KEY_TYPE_EC_PUBLIC: + case HAL_KEY_TYPE_HASHSIG_PRIVATE: + case HAL_KEY_TYPE_HASHSIG_PUBLIC: + case HAL_KEY_TYPE_HASHSIG_LMS: + case HAL_KEY_TYPE_HASHSIG_LMOTS: return 1; default: return 0; diff --git a/ks_volatile.c b/ks_volatile.c index 2d0abd4..75d7fcb 100644 --- a/ks_volatile.c +++ b/ks_volatile.c @@ -43,10 +43,6 @@ #include "hal_internal.h" #include "ks.h" -#ifndef STATIC_KS_VOLATILE_SLOTS -#define STATIC_KS_VOLATILE_SLOTS HAL_STATIC_PKEY_STATE_BLOCKS -#endif - #ifndef KS_VOLATILE_CACHE_SIZE #define KS_VOLATILE_CACHE_SIZE 4 #endif @@ -258,8 +254,8 @@ static hal_error_t ks_volatile_init(hal_ks_t *ks, const int alloc) hal_error_t err; if (alloc && - (err = hal_ks_alloc_common(ks, STATIC_KS_VOLATILE_SLOTS, KS_VOLATILE_CACHE_SIZE, - &mem, sizeof(*db->keys) * STATIC_KS_VOLATILE_SLOTS)) != HAL_OK) + (err = hal_ks_alloc_common(ks, HAL_STATIC_KS_VOLATILE_SLOTS, KS_VOLATILE_CACHE_SIZE, + &mem, sizeof(*db->keys) * HAL_STATIC_KS_VOLATILE_SLOTS)) != HAL_OK) return err; if (alloc) @@ -35,6 +35,7 @@ #include "hal.h" #include "hal_internal.h" +#include "hashsig.h" const hal_hash_handle_t hal_hash_handle_none = {HAL_HANDLE_NONE}; @@ -64,6 +65,10 @@ static inline int check_pkey_type(const hal_key_type_t type) case HAL_KEY_TYPE_RSA_PUBLIC: case HAL_KEY_TYPE_EC_PRIVATE: case HAL_KEY_TYPE_EC_PUBLIC: + case HAL_KEY_TYPE_HASHSIG_PRIVATE: + case HAL_KEY_TYPE_HASHSIG_PUBLIC: + case HAL_KEY_TYPE_HASHSIG_LMS: + case HAL_KEY_TYPE_HASHSIG_LMOTS: return 1; default: return 0; @@ -91,6 +96,10 @@ static inline int check_pkey_type_curve_flags(const hal_key_type_t type, case HAL_KEY_TYPE_RSA_PRIVATE: case HAL_KEY_TYPE_RSA_PUBLIC: + case HAL_KEY_TYPE_HASHSIG_PRIVATE: + case HAL_KEY_TYPE_HASHSIG_PUBLIC: + case HAL_KEY_TYPE_HASHSIG_LMS: + case HAL_KEY_TYPE_HASHSIG_LMOTS: return curve == HAL_CURVE_NONE; case HAL_KEY_TYPE_EC_PRIVATE: @@ -264,6 +273,20 @@ hal_error_t hal_rpc_pkey_generate_ec(const hal_client_handle_t client, return hal_rpc_pkey_dispatch->generate_ec(client, session, pkey, name, curve, flags); } +hal_error_t hal_rpc_pkey_generate_hashsig(const hal_client_handle_t client, + const hal_session_handle_t session, + hal_pkey_handle_t *pkey, + hal_uuid_t *name, + const size_t hss_levels, + const lms_algorithm_t lms_type, + const lmots_algorithm_t lmots_type, + const hal_key_flags_t flags) +{ + if (pkey == NULL || name == NULL || !check_pkey_flags(flags)) + return HAL_ERROR_BAD_ARGUMENTS; + return hal_rpc_pkey_dispatch->generate_hashsig(client, session, pkey, name, hss_levels, lms_type, lmots_type, flags); +} + hal_error_t hal_rpc_pkey_close(const hal_pkey_handle_t pkey) { return hal_rpc_pkey_dispatch->close(pkey); diff --git a/rpc_client.c b/rpc_client.c index bb63448..2fb8ae6 100644 --- a/rpc_client.c +++ b/rpc_client.c @@ -38,6 +38,7 @@ #include "hal.h" #include "hal_internal.h" #include "xdr_internal.h" +#include "hashsig.h" #ifndef HAL_RPC_CLIENT_DEBUG #define HAL_RPC_CLIENT_DEBUG 0 @@ -544,6 +545,44 @@ static hal_error_t pkey_remote_generate_ec(const hal_client_handle_t client, return rpc_ret; } +static hal_error_t pkey_remote_generate_hashsig(const hal_client_handle_t client, + const hal_session_handle_t session, + hal_pkey_handle_t *pkey, + hal_uuid_t *name, + const size_t hss_levels, + const lms_algorithm_t lms_type, + const lmots_algorithm_t lmots_type, + const hal_key_flags_t flags) +{ + uint8_t outbuf[nargs(7)], *optr = outbuf, *olimit = outbuf + sizeof(outbuf); + uint8_t inbuf[nargs(5) + pad(sizeof(name->uuid))]; + const uint8_t *iptr = inbuf, *ilimit = inbuf + sizeof(inbuf); + size_t name_len = sizeof(name->uuid); + hal_error_t rpc_ret; + + check(hal_xdr_encode_int(&optr, olimit, RPC_FUNC_PKEY_GENERATE_HASHSIG)); + check(hal_xdr_encode_int(&optr, olimit, client.handle)); + check(hal_xdr_encode_int(&optr, olimit, session.handle)); + check(hal_xdr_encode_int(&optr, olimit, (uint32_t)hss_levels)); + check(hal_xdr_encode_int(&optr, olimit, (uint32_t)lms_type)); + check(hal_xdr_encode_int(&optr, olimit, (uint32_t)lmots_type)); + check(hal_xdr_encode_int(&optr, olimit, flags)); + check(hal_rpc_send(outbuf, optr - outbuf)); + + check(read_matching_packet(RPC_FUNC_PKEY_GENERATE_HASHSIG, inbuf, sizeof(inbuf), &iptr, &ilimit)); + + check(hal_xdr_decode_int(&iptr, ilimit, &rpc_ret)); + + if (rpc_ret == HAL_OK) { + check(hal_xdr_decode_int(&iptr, ilimit, &pkey->handle)); + check(hal_xdr_decode_variable_opaque(&iptr, ilimit, name->uuid, &name_len)); + if (name_len != sizeof(name->uuid)) + return HAL_ERROR_KEY_NAME_TOO_LONG; + } + + return rpc_ret; +} + static hal_error_t pkey_remote_close(const hal_pkey_handle_t pkey) { uint8_t outbuf[nargs(3)], *optr = outbuf, *olimit = outbuf + sizeof(outbuf); @@ -1095,6 +1134,7 @@ const hal_rpc_pkey_dispatch_t hal_rpc_remote_pkey_dispatch = { .open = pkey_remote_open, .generate_rsa = pkey_remote_generate_rsa, .generate_ec = pkey_remote_generate_ec, + .generate_hashsig = pkey_remote_generate_hashsig, .close = pkey_remote_close, .delete = pkey_remote_delete, .get_key_type = pkey_remote_get_key_type, @@ -1117,6 +1157,7 @@ const hal_rpc_pkey_dispatch_t hal_rpc_mixed_pkey_dispatch = { .open = pkey_remote_open, .generate_rsa = pkey_remote_generate_rsa, .generate_ec = pkey_remote_generate_ec, + .generate_hashsig = pkey_remote_generate_hashsig, .close = pkey_remote_close, .delete = pkey_remote_delete, .get_key_type = pkey_remote_get_key_type, @@ -39,6 +39,7 @@ #include "hal.h" #include "hal_internal.h" #include "asn1_internal.h" +#include "hashsig.h" #ifndef HAL_STATIC_PKEY_STATE_BLOCKS #define HAL_STATIC_PKEY_STATE_BLOCKS 0 @@ -524,6 +525,68 @@ static hal_error_t pkey_local_generate_ec(const hal_client_handle_t client, } /* + * Generate a new hash-tree key with supplied name, return a key handle. + */ + +static hal_error_t pkey_local_generate_hashsig(const hal_client_handle_t client, + const hal_session_handle_t session, + hal_pkey_handle_t *pkey, + hal_uuid_t *name, + const size_t hss_levels, + const lms_algorithm_t lms_type, + const lmots_algorithm_t lmots_type, + const hal_key_flags_t flags) +{ + assert(pkey != NULL && name != NULL); + + hal_hashsig_key_t *key = NULL; + hal_pkey_slot_t *slot; + hal_error_t err; + + if ((err = check_writable(client, flags)) != HAL_OK) + return err; + + if ((slot = alloc_slot(flags)) == NULL) + return HAL_ERROR_NO_KEY_SLOTS_AVAILABLE; + + if ((err = hal_uuid_gen(&slot->name)) != HAL_OK) + return err; + + slot->client = client; + slot->session = session; + slot->type = HAL_KEY_TYPE_HASHSIG_PRIVATE, + slot->curve = HAL_CURVE_NONE; + slot->flags = flags; + + if ((err = hal_hashsig_key_gen(NULL, &key, hss_levels, lms_type, lmots_type)) != HAL_OK) { + slot->type = HAL_KEY_TYPE_NONE; + return err; + } + + uint8_t der[hal_hashsig_private_key_to_der_len(key)]; + size_t der_len; + + if ((err = hal_hashsig_private_key_to_der(key, der, &der_len, sizeof(der))) == HAL_OK) + err = hal_ks_store(ks_from_flags(flags), slot, der, der_len); + + /* There's nothing sensitive in the top-level private key, but we wipe + * the der anyway, for symmetry with other key types. The actual key buf + * is allocated internally and stays in memory, because everything else + * is linked off of it. + */ + memset(der, 0, sizeof(der)); + + if (err != HAL_OK) { + slot->type = HAL_KEY_TYPE_NONE; + return err; + } + + *pkey = slot->pkey; + *name = slot->name; + return HAL_OK; +} + +/* * Discard key handle, leaving key intact. */ @@ -542,6 +605,7 @@ static hal_error_t pkey_local_close(const hal_pkey_handle_t pkey) /* * Delete a key from the store, given its key handle. */ +static hal_error_t pkey_local_get_key_type(const hal_pkey_handle_t pkey, hal_key_type_t *type); static hal_error_t pkey_local_delete(const hal_pkey_handle_t pkey) { @@ -555,6 +619,21 @@ static hal_error_t pkey_local_delete(const hal_pkey_handle_t pkey) if ((err = check_writable(slot->client, slot->flags)) != HAL_OK) return err; + hal_key_type_t key_type; + if ((err = pkey_local_get_key_type(pkey, &key_type)) != HAL_OK) + return err; + + if (key_type == HAL_KEY_TYPE_HASHSIG_PRIVATE) { + hal_hashsig_key_t *key; + uint8_t keybuf[hal_hashsig_key_t_size]; + uint8_t der[HAL_KS_WRAPPED_KEYSIZE]; + size_t der_len; + if ((err = ks_fetch_from_flags(slot, der, &der_len, sizeof(der))) != HAL_OK || + (err = hal_hashsig_private_key_from_der(&key, keybuf, sizeof(keybuf), der, der_len)) != HAL_OK || + (err = hal_hashsig_key_delete(key)) != HAL_OK) + return err; + } + err = hal_ks_delete(ks_from_flags(slot->flags), slot); if (err == HAL_OK || err == HAL_ERROR_KEY_NOT_FOUND) @@ -636,9 +715,15 @@ static size_t pkey_local_get_public_key_len(const hal_pkey_handle_t pkey) size_t result = 0; - uint8_t keybuf[hal_rsa_key_t_size > hal_ecdsa_key_t_size ? hal_rsa_key_t_size : hal_ecdsa_key_t_size]; - hal_rsa_key_t *rsa_key = NULL; - hal_ecdsa_key_t *ecdsa_key = NULL; +#ifndef max +#define max(a, b) ((a) >= (b) ? (a) : (b)) +#endif + size_t keybuf_size = max(hal_rsa_key_t_size, hal_ecdsa_key_t_size); + keybuf_size = max(keybuf_size, hal_hashsig_key_t_size); + uint8_t keybuf[keybuf_size]; + hal_rsa_key_t *rsa_key = NULL; + hal_ecdsa_key_t *ecdsa_key = NULL; + hal_hashsig_key_t *hashsig_key = NULL; uint8_t der[HAL_KS_WRAPPED_KEYSIZE]; size_t der_len; hal_error_t err; @@ -648,6 +733,7 @@ static size_t pkey_local_get_public_key_len(const hal_pkey_handle_t pkey) case HAL_KEY_TYPE_RSA_PUBLIC: case HAL_KEY_TYPE_EC_PUBLIC: + case HAL_KEY_TYPE_HASHSIG_PUBLIC: result = der_len; break; @@ -661,6 +747,11 @@ static size_t pkey_local_get_public_key_len(const hal_pkey_handle_t pkey) result = hal_ecdsa_public_key_to_der_len(ecdsa_key); break; + case HAL_KEY_TYPE_HASHSIG_PRIVATE: + if (hal_hashsig_private_key_from_der(&hashsig_key, keybuf, sizeof(keybuf), der, der_len) == HAL_OK) + result = hal_hashsig_public_key_to_der_len(hashsig_key); + break; + default: break; } @@ -684,10 +775,12 @@ static hal_error_t pkey_local_get_public_key(const hal_pkey_handle_t pkey, if (slot == NULL) return HAL_ERROR_KEY_NOT_FOUND; - uint8_t keybuf[hal_rsa_key_t_size > hal_ecdsa_key_t_size - ? hal_rsa_key_t_size : hal_ecdsa_key_t_size]; - hal_rsa_key_t *rsa_key = NULL; - hal_ecdsa_key_t *ecdsa_key = NULL; + size_t keybuf_size = max(hal_rsa_key_t_size, hal_ecdsa_key_t_size); + keybuf_size = max(keybuf_size, hal_hashsig_key_t_size); + uint8_t keybuf[keybuf_size]; + hal_rsa_key_t *rsa_key = NULL; + hal_ecdsa_key_t *ecdsa_key = NULL; + hal_hashsig_key_t *hashsig_key = NULL; uint8_t buf[HAL_KS_WRAPPED_KEYSIZE]; size_t buf_len; hal_error_t err; @@ -697,6 +790,7 @@ static hal_error_t pkey_local_get_public_key(const hal_pkey_handle_t pkey, case HAL_KEY_TYPE_RSA_PUBLIC: case HAL_KEY_TYPE_EC_PUBLIC: + case HAL_KEY_TYPE_HASHSIG_PUBLIC: if (der_len != NULL) *der_len = buf_len; if (der != NULL && der_max < buf_len) @@ -715,6 +809,11 @@ static hal_error_t pkey_local_get_public_key(const hal_pkey_handle_t pkey, err = hal_ecdsa_public_key_to_der(ecdsa_key, der, der_len, der_max); break; + case HAL_KEY_TYPE_HASHSIG_PRIVATE: + if ((err = hal_hashsig_private_key_from_der(&hashsig_key, keybuf, sizeof(keybuf), buf, buf_len)) == HAL_OK) + err = hal_hashsig_public_key_to_der(hashsig_key, der, der_len, der_max); + break; + default: err = HAL_ERROR_UNSUPPORTED_KEY; break; @@ -815,6 +914,44 @@ static hal_error_t pkey_local_sign_ecdsa(hal_pkey_slot_t *slot, return HAL_OK; } +static hal_error_t pkey_local_sign_hashsig(hal_pkey_slot_t *slot, + uint8_t *keybuf, const size_t keybuf_len, + const uint8_t * const der, const size_t der_len, + const hal_hash_handle_t hash, + const uint8_t * input, size_t input_len, + uint8_t * signature, size_t *signature_len, const size_t signature_max) +{ + hal_hashsig_key_t *key = NULL; + hal_error_t err; + + assert(signature != NULL && signature_len != NULL); + assert((hash.handle == HAL_HANDLE_NONE) != (input == NULL || input_len == 0)); + + if ((err = hal_hashsig_private_key_from_der(&key, keybuf, keybuf_len, der, der_len)) != HAL_OK) + return err; + + if (input == NULL || input_len == 0) { + hal_digest_algorithm_t alg; + + if ((err = hal_rpc_hash_get_algorithm(hash, &alg)) != HAL_OK || + (err = hal_rpc_hash_get_digest_length(alg, &input_len)) != HAL_OK) + return err; + + if (input_len > signature_max) + return HAL_ERROR_RESULT_TOO_LONG; + + if ((err = hal_rpc_hash_finalize(hash, signature, input_len)) != HAL_OK) + return err; + + input = signature; + } + + if ((err = hal_hashsig_sign(NULL, key, input, input_len, signature, signature_len, signature_max)) != HAL_OK) + return err; + + return HAL_OK; +} + static hal_error_t pkey_local_sign(const hal_pkey_handle_t pkey, const hal_hash_handle_t hash, const uint8_t * const input, const size_t input_len, @@ -831,13 +968,20 @@ static hal_error_t pkey_local_sign(const hal_pkey_handle_t pkey, const hal_hash_handle_t hash, const uint8_t * const input, const size_t input_len, uint8_t * signature, size_t *signature_len, const size_t signature_max); + size_t keybuf_size; switch (slot->type) { case HAL_KEY_TYPE_RSA_PRIVATE: signer = pkey_local_sign_rsa; + keybuf_size = hal_rsa_key_t_size; break; case HAL_KEY_TYPE_EC_PRIVATE: signer = pkey_local_sign_ecdsa; + keybuf_size = hal_ecdsa_key_t_size; + break; + case HAL_KEY_TYPE_HASHSIG_PRIVATE: + signer = pkey_local_sign_hashsig; + keybuf_size = hal_hashsig_key_t_size; break; default: return HAL_ERROR_UNSUPPORTED_KEY; @@ -846,8 +990,7 @@ static hal_error_t pkey_local_sign(const hal_pkey_handle_t pkey, if ((slot->flags & HAL_KEY_FLAG_USAGE_DIGITALSIGNATURE) == 0) return HAL_ERROR_FORBIDDEN; - uint8_t keybuf[hal_rsa_key_t_size > hal_ecdsa_key_t_size - ? hal_rsa_key_t_size : hal_ecdsa_key_t_size]; + uint8_t keybuf[keybuf_size]; uint8_t der[HAL_KS_WRAPPED_KEYSIZE]; size_t der_len; hal_error_t err; @@ -960,6 +1103,40 @@ static hal_error_t pkey_local_verify_ecdsa(uint8_t *keybuf, const size_t keybuf_ return HAL_OK; } +static hal_error_t pkey_local_verify_hashsig(uint8_t *keybuf, const size_t keybuf_len, const hal_key_type_t type, + const uint8_t * const der, const size_t der_len, + const hal_hash_handle_t hash, + const uint8_t * input, size_t input_len, + const uint8_t * const signature, const size_t signature_len) +{ + uint8_t digest[signature_len]; + hal_hashsig_key_t *key = NULL; + hal_error_t err; + + assert(signature != NULL && signature_len > 0); + assert((hash.handle == HAL_HANDLE_NONE) != (input == NULL || input_len == 0)); + + if ((err = hal_hashsig_public_key_from_der(&key, keybuf, keybuf_len, der, der_len)) != HAL_OK) + return err; + + if (input == NULL || input_len == 0) { + hal_digest_algorithm_t alg; + + // ??? + if ((err = hal_rpc_hash_get_algorithm(hash, &alg)) != HAL_OK || + (err = hal_rpc_hash_get_digest_length(alg, &input_len)) != HAL_OK || + (err = hal_rpc_hash_finalize(hash, digest, sizeof(digest))) != HAL_OK) + return err; + + input = digest; + } + + if ((err = hal_hashsig_verify(NULL, key, input, input_len, signature, signature_len)) != HAL_OK) + return err; + + return HAL_OK; +} + static hal_error_t pkey_local_verify(const hal_pkey_handle_t pkey, const hal_hash_handle_t hash, const uint8_t * const input, const size_t input_len, @@ -975,15 +1152,22 @@ static hal_error_t pkey_local_verify(const hal_pkey_handle_t pkey, const hal_hash_handle_t hash, const uint8_t * const input, const size_t input_len, const uint8_t * const signature, const size_t signature_len); + size_t keybuf_size; switch (slot->type) { case HAL_KEY_TYPE_RSA_PRIVATE: case HAL_KEY_TYPE_RSA_PUBLIC: verifier = pkey_local_verify_rsa; + keybuf_size = hal_rsa_key_t_size; break; case HAL_KEY_TYPE_EC_PRIVATE: case HAL_KEY_TYPE_EC_PUBLIC: verifier = pkey_local_verify_ecdsa; + keybuf_size = hal_ecdsa_key_t_size; + break; + case HAL_KEY_TYPE_HASHSIG_PUBLIC: + verifier = pkey_local_verify_hashsig; + keybuf_size = hal_hashsig_key_t_size; break; default: return HAL_ERROR_UNSUPPORTED_KEY; @@ -992,8 +1176,7 @@ static hal_error_t pkey_local_verify(const hal_pkey_handle_t pkey, if ((slot->flags & HAL_KEY_FLAG_USAGE_DIGITALSIGNATURE) == 0) return HAL_ERROR_FORBIDDEN; - uint8_t keybuf[hal_rsa_key_t_size > hal_ecdsa_key_t_size - ? hal_rsa_key_t_size : hal_ecdsa_key_t_size]; + uint8_t keybuf[keybuf_size]; uint8_t der[HAL_KS_WRAPPED_KEYSIZE]; size_t der_len; hal_error_t err; @@ -1317,6 +1500,7 @@ const hal_rpc_pkey_dispatch_t hal_rpc_local_pkey_dispatch = { .open = pkey_local_open, .generate_rsa = pkey_local_generate_rsa, .generate_ec = pkey_local_generate_ec, + .generate_hashsig = pkey_local_generate_hashsig, .close = pkey_local_close, .delete = pkey_local_delete, .get_key_type = pkey_local_get_key_type, diff --git a/rpc_server.c b/rpc_server.c index 3a23f4d..5a06e37 100644 --- a/rpc_server.c +++ b/rpc_server.c @@ -35,6 +35,7 @@ #include "hal.h" #include "hal_internal.h" #include "xdr_internal.h" +#include "hashsig.h" /* * RPC calls. @@ -359,6 +360,36 @@ static hal_error_t pkey_generate_ec(const uint8_t **iptr, const uint8_t * const return err; } +static hal_error_t pkey_generate_hashsig(const uint8_t **iptr, const uint8_t * const ilimit, + uint8_t **optr, const uint8_t * const olimit) +{ + hal_client_handle_t client; + hal_session_handle_t session; + hal_pkey_handle_t pkey; + hal_uuid_t name; + uint32_t hss_levels; + uint32_t lms_type; + uint32_t lmots_type; + hal_key_flags_t flags; + uint8_t *optr_orig = *optr; + hal_error_t err; + + check(hal_xdr_decode_int(iptr, ilimit, &client.handle)); + check(hal_xdr_decode_int(iptr, ilimit, &session.handle)); + check(hal_xdr_decode_int(iptr, ilimit, &hss_levels)); + check(hal_xdr_decode_int(iptr, ilimit, &lms_type)); + check(hal_xdr_decode_int(iptr, ilimit, &lmots_type)); + check(hal_xdr_decode_int(iptr, ilimit, &flags)); + + check(hal_rpc_pkey_generate_hashsig(client, session, &pkey, &name, hss_levels, lms_type, lmots_type, flags)); + + if ((err = hal_xdr_encode_int(optr, olimit, pkey.handle)) != HAL_OK || + (err = hal_xdr_encode_variable_opaque(optr, olimit, name.uuid, sizeof(name.uuid))) != HAL_OK) + *optr = optr_orig; + + return err; +} + static hal_error_t pkey_close(const uint8_t **iptr, const uint8_t * const ilimit, uint8_t **optr, const uint8_t * const olimit) { @@ -794,6 +825,9 @@ hal_error_t hal_rpc_server_dispatch(const uint8_t * const ibuf, const size_t ile case RPC_FUNC_PKEY_GENERATE_EC: handler = pkey_generate_ec; break; + case RPC_FUNC_PKEY_GENERATE_HASHSIG: + handler = pkey_generate_hashsig; + break; case RPC_FUNC_PKEY_CLOSE: handler = pkey_close; break; diff --git a/tests/Makefile b/tests/Makefile index d64728f..d186000 100644 --- a/tests/Makefile +++ b/tests/Makefile @@ -45,7 +45,7 @@ CFLAGS ?= -g3 -Wall -fPIC -std=c99 -I${LIBHAL_SRC} -I${LIBTFM_BLD} CORE_TESTS = test-aes-key-wrap test-hash test-pbkdf2 test-ecdsa test-bus test-trng test-rsa test-mkmif SERVER_TESTS = test-rpc_server -CLIENT_TESTS = test-rpc_hash test-rpc_pkey test-rpc_get_version test-rpc_get_random test-rpc_login test-rpc_bighash test-xdr +CLIENT_TESTS = test-rpc_hash test-rpc_pkey test-rpc_get_version test-rpc_get_random test-rpc_login test-rpc_bighash test-xdr test-rpc_hashsig ALL_TESTS = ${CORE_TESTS} ${SERVER_TESTS} ${CLIENT_TESTS} @@ -78,3 +78,5 @@ ${BIN}: %: %.o ${LIBS} %.o: %.c ${LBHAL_SRC}/*.h ${LIBTFM_BLD}/tfm.h ${CC} ${CFLAGS} -c -o $@ $< + +test-rpc_hashsig.o: test-hashsig.h diff --git a/tests/test-hashsig.h b/tests/test-hashsig.h new file mode 100644 index 0000000..b76f9b1 --- /dev/null +++ b/tests/test-hashsig.h @@ -0,0 +1,392 @@ +/* + * draft-mcgrew Test Case 1 + */ + +/* Test Case 1 Public Key */ + +static uint8_t tc1_key[] = { + 0x00, 0x00, 0x00, 0x02, + 0x00, 0x00, 0x00, 0x05, + 0x00, 0x00, 0x00, 0x04, + 0x61, 0xa5, 0xd5, 0x7d, 0x37, 0xf5, 0xe4, 0x6b, + 0xfb, 0x75, 0x20, 0x80, 0x6b, 0x07, 0xa1, 0xb8, + 0x50, 0x65, 0x0e, 0x3b, 0x31, 0xfe, 0x4a, 0x77, + 0x3e, 0xa2, 0x9a, 0x07, 0xf0, 0x9c, 0xf2, 0xea, + 0x30, 0xe5, 0x79, 0xf0, 0xdf, 0x58, 0xef, 0x8e, + 0x29, 0x8d, 0xa0, 0x43, 0x4c, 0xb2, 0xb8, 0x78, +}; + +/* Test Case 1 Message */ + +static uint8_t tc1_msg[] = { + 0x54, 0x68, 0x65, 0x20, 0x70, 0x6f, 0x77, 0x65, + 0x72, 0x73, 0x20, 0x6e, 0x6f, 0x74, 0x20, 0x64, + 0x65, 0x6c, 0x65, 0x67, 0x61, 0x74, 0x65, 0x64, + 0x20, 0x74, 0x6f, 0x20, 0x74, 0x68, 0x65, 0x20, + 0x55, 0x6e, 0x69, 0x74, 0x65, 0x64, 0x20, 0x53, + 0x74, 0x61, 0x74, 0x65, 0x73, 0x20, 0x62, 0x79, + 0x20, 0x74, 0x68, 0x65, 0x20, 0x43, 0x6f, 0x6e, + 0x73, 0x74, 0x69, 0x74, 0x75, 0x74, 0x69, 0x6f, + 0x6e, 0x2c, 0x20, 0x6e, 0x6f, 0x72, 0x20, 0x70, + 0x72, 0x6f, 0x68, 0x69, 0x62, 0x69, 0x74, 0x65, + 0x64, 0x20, 0x62, 0x79, 0x20, 0x69, 0x74, 0x20, + 0x74, 0x6f, 0x20, 0x74, 0x68, 0x65, 0x20, 0x53, + 0x74, 0x61, 0x74, 0x65, 0x73, 0x2c, 0x20, 0x61, + 0x72, 0x65, 0x20, 0x72, 0x65, 0x73, 0x65, 0x72, + 0x76, 0x65, 0x64, 0x20, 0x74, 0x6f, 0x20, 0x74, + 0x68, 0x65, 0x20, 0x53, 0x74, 0x61, 0x74, 0x65, + 0x73, 0x20, 0x72, 0x65, 0x73, 0x70, 0x65, 0x63, + 0x74, 0x69, 0x76, 0x65, 0x6c, 0x79, 0x2c, 0x20, + 0x6f, 0x72, 0x20, 0x74, 0x6f, 0x20, 0x74, 0x68, + 0x65, 0x20, 0x70, 0x65, 0x6f, 0x70, 0x6c, 0x65, + 0x2e, 0x0a, +}; + +/* Test Case 1 Signature */ + +static uint8_t tc1_sig[] = { + 0x00, 0x00, 0x00, 0x01, + 0x00, 0x00, 0x00, 0x05, + 0x00, 0x00, 0x00, 0x04, + 0xd3, 0x2b, 0x56, 0x67, 0x1d, 0x7e, 0xb9, 0x88, + 0x33, 0xc4, 0x9b, 0x43, 0x3c, 0x27, 0x25, 0x86, + 0xbc, 0x4a, 0x1c, 0x8a, 0x89, 0x70, 0x52, 0x8f, + 0xfa, 0x04, 0xb9, 0x66, 0xf9, 0x42, 0x6e, 0xb9, + 0x96, 0x5a, 0x25, 0xbf, 0xd3, 0x7f, 0x19, 0x6b, + 0x90, 0x73, 0xf3, 0xd4, 0xa2, 0x32, 0xfe, 0xb6, + 0x91, 0x28, 0xec, 0x45, 0x14, 0x6f, 0x86, 0x29, + 0x2f, 0x9d, 0xff, 0x96, 0x10, 0xa7, 0xbf, 0x95, + 0xa6, 0x4c, 0x7f, 0x60, 0xf6, 0x26, 0x1a, 0x62, + 0x04, 0x3f, 0x86, 0xc7, 0x03, 0x24, 0xb7, 0x70, + 0x7f, 0x5b, 0x4a, 0x8a, 0x6e, 0x19, 0xc1, 0x14, + 0xc7, 0xbe, 0x86, 0x6d, 0x48, 0x87, 0x78, 0xa0, + 0xe0, 0x5f, 0xd5, 0xc6, 0x50, 0x9a, 0x6e, 0x61, + 0xd5, 0x59, 0xcf, 0x1a, 0x77, 0xa9, 0x70, 0xde, + 0x92, 0x7d, 0x60, 0xc7, 0x0d, 0x3d, 0xe3, 0x1a, + 0x7f, 0xa0, 0x10, 0x09, 0x94, 0xe1, 0x62, 0xa2, + 0x58, 0x2e, 0x8f, 0xf1, 0xb1, 0x0c, 0xd9, 0x9d, + 0x4e, 0x8e, 0x41, 0x3e, 0xf4, 0x69, 0x55, 0x9f, + 0x7d, 0x7e, 0xd1, 0x2c, 0x83, 0x83, 0x42, 0xf9, + 0xb9, 0xc9, 0x6b, 0x83, 0xa4, 0x94, 0x3d, 0x16, + 0x81, 0xd8, 0x4b, 0x15, 0x35, 0x7f, 0xf4, 0x8c, + 0xa5, 0x79, 0xf1, 0x9f, 0x5e, 0x71, 0xf1, 0x84, + 0x66, 0xf2, 0xbb, 0xef, 0x4b, 0xf6, 0x60, 0xc2, + 0x51, 0x8e, 0xb2, 0x0d, 0xe2, 0xf6, 0x6e, 0x3b, + 0x14, 0x78, 0x42, 0x69, 0xd7, 0xd8, 0x76, 0xf5, + 0xd3, 0x5d, 0x3f, 0xbf, 0xc7, 0x03, 0x9a, 0x46, + 0x2c, 0x71, 0x6b, 0xb9, 0xf6, 0x89, 0x1a, 0x7f, + 0x41, 0xad, 0x13, 0x3e, 0x9e, 0x1f, 0x6d, 0x95, + 0x60, 0xb9, 0x60, 0xe7, 0x77, 0x7c, 0x52, 0xf0, + 0x60, 0x49, 0x2f, 0x2d, 0x7c, 0x66, 0x0e, 0x14, + 0x71, 0xe0, 0x7e, 0x72, 0x65, 0x55, 0x62, 0x03, + 0x5a, 0xbc, 0x9a, 0x70, 0x1b, 0x47, 0x3e, 0xcb, + 0xc3, 0x94, 0x3c, 0x6b, 0x9c, 0x4f, 0x24, 0x05, + 0xa3, 0xcb, 0x8b, 0xf8, 0xa6, 0x91, 0xca, 0x51, + 0xd3, 0xf6, 0xad, 0x2f, 0x42, 0x8b, 0xab, 0x6f, + 0x3a, 0x30, 0xf5, 0x5d, 0xd9, 0x62, 0x55, 0x63, + 0xf0, 0xa7, 0x5e, 0xe3, 0x90, 0xe3, 0x85, 0xe3, + 0xae, 0x0b, 0x90, 0x69, 0x61, 0xec, 0xf4, 0x1a, + 0xe0, 0x73, 0xa0, 0x59, 0x0c, 0x2e, 0xb6, 0x20, + 0x4f, 0x44, 0x83, 0x1c, 0x26, 0xdd, 0x76, 0x8c, + 0x35, 0xb1, 0x67, 0xb2, 0x8c, 0xe8, 0xdc, 0x98, + 0x8a, 0x37, 0x48, 0x25, 0x52, 0x30, 0xce, 0xf9, + 0x9e, 0xbf, 0x14, 0xe7, 0x30, 0x63, 0x2f, 0x27, + 0x41, 0x44, 0x89, 0x80, 0x8a, 0xfa, 0xb1, 0xd1, + 0xe7, 0x83, 0xed, 0x04, 0x51, 0x6d, 0xe0, 0x12, + 0x49, 0x86, 0x82, 0x21, 0x2b, 0x07, 0x81, 0x05, + 0x79, 0xb2, 0x50, 0x36, 0x59, 0x41, 0xbc, 0xc9, + 0x81, 0x42, 0xda, 0x13, 0x60, 0x9e, 0x97, 0x68, + 0xaa, 0xf6, 0x5d, 0xe7, 0x62, 0x0d, 0xab, 0xec, + 0x29, 0xeb, 0x82, 0xa1, 0x7f, 0xde, 0x35, 0xaf, + 0x15, 0xad, 0x23, 0x8c, 0x73, 0xf8, 0x1b, 0xdb, + 0x8d, 0xec, 0x2f, 0xc0, 0xe7, 0xf9, 0x32, 0x70, + 0x10, 0x99, 0x76, 0x2b, 0x37, 0xf4, 0x3c, 0x4a, + 0x3c, 0x20, 0x01, 0x0a, 0x3d, 0x72, 0xe2, 0xf6, + 0x06, 0xbe, 0x10, 0x8d, 0x31, 0x0e, 0x63, 0x9f, + 0x09, 0xce, 0x72, 0x86, 0x80, 0x0d, 0x9e, 0xf8, + 0xa1, 0xa4, 0x02, 0x81, 0xcc, 0x5a, 0x7e, 0xa9, + 0x8d, 0x2a, 0xdc, 0x7c, 0x74, 0x00, 0xc2, 0xfe, + 0x5a, 0x10, 0x15, 0x52, 0xdf, 0x4e, 0x3c, 0xcc, + 0xfd, 0x0c, 0xbf, 0x2d, 0xdf, 0x5d, 0xc6, 0x77, + 0x9c, 0xbb, 0xc6, 0x8f, 0xee, 0x0c, 0x3e, 0xfe, + 0x4e, 0xc2, 0x2b, 0x83, 0xa2, 0xca, 0xa3, 0xe4, + 0x8e, 0x08, 0x09, 0xa0, 0xa7, 0x50, 0xb7, 0x3c, + 0xcd, 0xcf, 0x3c, 0x79, 0xe6, 0x58, 0x0c, 0x15, + 0x4f, 0x8a, 0x58, 0xf7, 0xf2, 0x43, 0x35, 0xee, + 0xc5, 0xc5, 0xeb, 0x5e, 0x0c, 0xf0, 0x1d, 0xcf, + 0x44, 0x39, 0x42, 0x40, 0x95, 0xfc, 0xeb, 0x07, + 0x7f, 0x66, 0xde, 0xd5, 0xbe, 0xc7, 0x3b, 0x27, + 0xc5, 0xb9, 0xf6, 0x4a, 0x2a, 0x9a, 0xf2, 0xf0, + 0x7c, 0x05, 0xe9, 0x9e, 0x5c, 0xf8, 0x0f, 0x00, + 0x25, 0x2e, 0x39, 0xdb, 0x32, 0xf6, 0xc1, 0x96, + 0x74, 0xf1, 0x90, 0xc9, 0xfb, 0xc5, 0x06, 0xd8, + 0x26, 0x85, 0x77, 0x13, 0xaf, 0xd2, 0xca, 0x6b, + 0xb8, 0x5c, 0xd8, 0xc1, 0x07, 0x34, 0x75, 0x52, + 0xf3, 0x05, 0x75, 0xa5, 0x41, 0x78, 0x16, 0xab, + 0x4d, 0xb3, 0xf6, 0x03, 0xf2, 0xdf, 0x56, 0xfb, + 0xc4, 0x13, 0xe7, 0xd0, 0xac, 0xd8, 0xbd, 0xd8, + 0x13, 0x52, 0xb2, 0x47, 0x1f, 0xc1, 0xbc, 0x4f, + 0x1e, 0xf2, 0x96, 0xfe, 0xa1, 0x22, 0x04, 0x03, + 0x46, 0x6b, 0x1a, 0xfe, 0x78, 0xb9, 0x4f, 0x7e, + 0xcf, 0x7c, 0xc6, 0x2f, 0xb9, 0x2b, 0xe1, 0x4f, + 0x18, 0xc2, 0x19, 0x23, 0x84, 0xeb, 0xce, 0xaf, + 0x88, 0x01, 0xaf, 0xdf, 0x94, 0x7f, 0x69, 0x8c, + 0xe9, 0xc6, 0xce, 0xb6, 0x96, 0xed, 0x70, 0xe9, + 0xe8, 0x7b, 0x01, 0x44, 0x41, 0x7e, 0x8d, 0x7b, + 0xaf, 0x25, 0xeb, 0x5f, 0x70, 0xf0, 0x9f, 0x01, + 0x6f, 0xc9, 0x25, 0xb4, 0xdb, 0x04, 0x8a, 0xb8, + 0xd8, 0xcb, 0x2a, 0x66, 0x1c, 0xe3, 0xb5, 0x7a, + 0xda, 0x67, 0x57, 0x1f, 0x5d, 0xd5, 0x46, 0xfc, + 0x22, 0xcb, 0x1f, 0x97, 0xe0, 0xeb, 0xd1, 0xa6, + 0x59, 0x26, 0xb1, 0x23, 0x4f, 0xd0, 0x4f, 0x17, + 0x1c, 0xf4, 0x69, 0xc7, 0x6b, 0x88, 0x4c, 0xf3, + 0x11, 0x5c, 0xce, 0x6f, 0x79, 0x2c, 0xc8, 0x4e, + 0x36, 0xda, 0x58, 0x96, 0x0c, 0x5f, 0x1d, 0x76, + 0x0f, 0x32, 0xc1, 0x2f, 0xae, 0xf4, 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0xe6, 0x19, 0x25, 0x20, + 0xd6, 0xa5, 0x11, 0x55, 0x14, 0x85, 0x1c, 0xe7, + 0xfd, 0x44, 0x8d, 0x4a, 0x39, 0xfa, 0xe2, 0xab, + 0x23, 0x35, 0xb5, 0x25, 0xf4, 0x84, 0xe9, 0xb4, + 0x0d, 0x6a, 0x4a, 0x96, 0x93, 0x94, 0x84, 0x3b, + 0xdc, 0xf6, 0xd1, 0x4c, 0x48, 0xe8, 0x01, 0x5e, + 0x08, 0xab, 0x92, 0x66, 0x2c, 0x05, 0xc6, 0xe9, + 0xf9, 0x0b, 0x65, 0xa7, 0xa6, 0x20, 0x16, 0x89, + 0x99, 0x9f, 0x32, 0xbf, 0xd3, 0x68, 0xe5, 0xe3, + 0xec, 0x9c, 0xb7, 0x0a, 0xc7, 0xb8, 0x39, 0x90, + 0x03, 0xf1, 0x75, 0xc4, 0x08, 0x85, 0x08, 0x1a, + 0x09, 0xab, 0x30, 0x34, 0x91, 0x1f, 0xe1, 0x25, + 0x63, 0x10, 0x51, 0xdf, 0x04, 0x08, 0xb3, 0x94, + 0x6b, 0x0b, 0xde, 0x79, 0x09, 0x11, 0xe8, 0x97, + 0x8b, 0xa0, 0x7d, 0xd5, 0x6c, 0x73, 0xe7, 0xee, +}; + +typedef struct { const uint8_t *val; size_t len; } hashsig_tc_bn_t; +typedef struct { hashsig_tc_bn_t key, msg, sig; } hashsig_tc_t; + +static const hashsig_tc_t hashsig_tc[] = { + { { tc1_key, sizeof(tc1_key) }, + { tc1_msg, sizeof(tc1_msg) }, + { tc1_sig, sizeof(tc1_sig) } } +}; diff --git a/tests/test-rpc_hashsig.c b/tests/test-rpc_hashsig.c new file mode 100644 index 0000000..d9dd0e7 --- /dev/null +++ b/tests/test-rpc_hashsig.c @@ -0,0 +1,528 @@ +/* + * test-rpc_hashsig.c + * ------------------ + * Test code for RPC interface to Cryptech public key operations. + * + * Authors: Rob Austein, Paul Selkirk + * Copyright (c) 2015-2018, NORDUnet A/S + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are + * met: + * - Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * + * - Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * - Neither the name of the NORDUnet nor the names of its contributors may + * be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS + * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED + * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A + * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED + * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF + * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING + * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS + * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +/* Parts of this may eventually get folded into test-rpc_pkey.c, + * but for now I'd rather do it stand-alone. + */ + +#include <stdio.h> +#include <stdlib.h> +#include <getopt.h> +#include <assert.h> + +#include <hal.h> +#include <hashsig.h> +#include "test-hashsig.h" + +#include <sys/time.h> +/* not included in my glibc, sigh... */ +void timersub(struct timeval *a, struct timeval *b, struct timeval *res) +{ + res->tv_sec = a->tv_sec - b->tv_sec; + res->tv_usec = a->tv_usec - b->tv_usec; + if (res->tv_usec < 0) { + res->tv_usec += 1000000; + --res->tv_sec; + } + if (res->tv_usec > 1000000) { + res->tv_usec -= 1000000; + ++res->tv_sec; + } +} + +static int debug = 0; +static int info = 0; + +#define lose(...) do { printf(__VA_ARGS__); goto fail; } while (0) + +static int test_hashsig_testvec_local(const hashsig_tc_t * const tc, hal_key_flags_t flags) +{ + hal_error_t err; + + assert(tc != NULL); + + printf("Starting local hashsig test vector test\n"); + + uint8_t tc_keybuf[hal_hashsig_key_t_size]; + hal_hashsig_key_t *tc_key = NULL; + + if ((err = hal_hashsig_key_load_public_xdr(&tc_key, + tc_keybuf, sizeof(tc_keybuf), + tc->key.val, tc->key.len)) != HAL_OK) + lose("Could not load public key from test vector: %s\n", hal_error_string(err)); + + if ((err = hal_hashsig_verify(NULL, tc_key, tc->msg.val, tc->msg.len, tc->sig.val, tc->sig.len)) != HAL_OK) + lose("Verify failed: %s\n", hal_error_string(err)); + + printf("OK\n"); + return 1; + +fail: + return 0; +} + +static int test_hashsig_testvec_remote(const hashsig_tc_t * const tc, hal_key_flags_t flags) +{ + const hal_client_handle_t client = {HAL_HANDLE_NONE}; + const hal_session_handle_t session = {HAL_HANDLE_NONE}; + hal_pkey_handle_t public_key = {HAL_HANDLE_NONE}; + hal_error_t err; + size_t len; + + assert(tc != NULL); + + { + flags |= HAL_KEY_FLAG_USAGE_DIGITALSIGNATURE; + + printf("Starting remote hashsig test vector test, flags 0x%lx\n", (unsigned long) flags); + + uint8_t tc_keybuf[hal_hashsig_key_t_size]; + hal_hashsig_key_t *tc_key = NULL; + + if ((err = hal_hashsig_key_load_public_xdr(&tc_key, + tc_keybuf, sizeof(tc_keybuf), + tc->key.val, tc->key.len)) != HAL_OK) + lose("Could not load public key from test vector: %s\n", hal_error_string(err)); + + hal_uuid_t public_name; + + uint8_t public_der[hal_hashsig_public_key_to_der_len(tc_key)]; + + if ((err = hal_hashsig_public_key_to_der(tc_key, public_der, &len, sizeof(public_der))) != HAL_OK) + lose("Could not DER encode public key from test vector: %s\n", hal_error_string(err)); + + assert(len == sizeof(public_der)); + + if ((err = hal_rpc_pkey_load(client, session, &public_key, &public_name, + public_der, sizeof(public_der), flags)) != HAL_OK) + lose("Could not load public key into RPC: %s\n", hal_error_string(err)); + + if ((err = hal_rpc_pkey_verify(public_key, hal_hash_handle_none, + tc->msg.val, tc->msg.len, tc->sig.val, tc->sig.len)) != HAL_OK) + lose("Could not verify: %s\n", hal_error_string(err)); + + if ((err = hal_rpc_pkey_delete(public_key)) != HAL_OK) + lose("Could not delete public key: %s\n", hal_error_string(err)); + + printf("OK\n"); + return 1; + } + +fail: + if (public_key.handle != HAL_HANDLE_NONE && + (err = hal_rpc_pkey_delete(public_key)) != HAL_OK) + printf("Warning: could not delete public key: %s\n", hal_error_string(err)); + + return 0; +} + +static void hexdump(const char * const label, const uint8_t * const buf, const size_t len) +{ + printf("%-15s ", label); + + for (size_t i = 0; i < len; ++i) { + printf("%02x", buf[i]); + if ((i & 0x0f) == 0x0f) { + printf("\n"); + if (i < len - 1) + printf(" "); + } + } + if ((len & 0x0f) != 0) + printf("\n"); +} + +static inline size_t lms_type_to_h(const lms_algorithm_t lms_type) +{ + switch (lms_type) { + case lms_sha256_n32_h5: return 5; + case lms_sha256_n32_h10: return 10; + case lms_sha256_n32_h15: return 15; + case lms_sha256_n32_h20: return 20; + case lms_sha256_n32_h25: return 25; + default: return 0; + } +} + +static inline size_t two_to_the(const size_t n) +{ + if (n % 5 != 0) + return 0; + + size_t result, i; + for (result = 1, i = 0; i < n; i += 5) + result *= 32; + + return result; +} + +static inline size_t lms_type_to_h2(const lms_algorithm_t lms_type) +{ + switch (lms_type) { + case lms_sha256_n32_h5: return two_to_the(5); + case lms_sha256_n32_h10: return two_to_the(10); + case lms_sha256_n32_h15: return two_to_the(15); + case lms_sha256_n32_h20: return two_to_the(20); + case lms_sha256_n32_h25: return two_to_the(25); + default: return 0; + } +} + +static inline size_t lmots_type_to_w(const lmots_algorithm_t lmots_type) +{ + switch (lmots_type) { + case lmots_sha256_n32_w1: return 1; + case lmots_sha256_n32_w2: return 2; + case lmots_sha256_n32_w4: return 4; + case lmots_sha256_n32_w8: return 8; + default: return 0; + } +} + +static inline size_t lmots_type_to_p(const lmots_algorithm_t lmots_type) +{ + switch (lmots_type) { + case lmots_sha256_n32_w1: return 265; + case lmots_sha256_n32_w2: return 133; + case lmots_sha256_n32_w4: return 67; + case lmots_sha256_n32_w8: return 34; + default: return 0; + } +} + +#include <xdr_internal.h> + +static hal_error_t dump_hss_signature(const uint8_t * const sig, const size_t len) +{ + const uint8_t *sigptr = sig; + const uint8_t * const siglim = sig + len; + hal_error_t err; + + hexdump("Nspk", sigptr, 4); + uint32_t Nspk; + if ((err = hal_xdr_decode_int(&sigptr, siglim, &Nspk)) != HAL_OK) return err; + + for (size_t i = 0; i < Nspk + 1; ++i) { + printf("--------------------------------------------\nsig[%lu]\n", i); + hexdump("q", sigptr, 4); sigptr += 4; + + { + hexdump("lmots type", sigptr, 4); + uint32_t lmots_type; + if ((err = hal_xdr_decode_int(&sigptr, siglim, &lmots_type)) != HAL_OK) return err; + hexdump("C", sigptr, 32); sigptr += 32; + size_t p = lmots_type_to_p((const lmots_algorithm_t)lmots_type); + for (size_t j = 0; j < p; ++j) { + char label[16]; + sprintf(label, "y[%lu]", j); + hexdump(label, sigptr, 32); sigptr += 32; + } + } + + hexdump("lms type", sigptr, 4); + uint32_t lms_type; + if ((err = hal_xdr_decode_int(&sigptr, siglim, &lms_type)) != HAL_OK) return err; + size_t h = lms_type_to_h((const lms_algorithm_t)lms_type); + for (size_t j = 0; j < h; ++j) { + char label[16]; + sprintf(label, "path[%lu]", j); + hexdump(label, sigptr, 32); sigptr += 32; + } + + if (i == Nspk) + break; + + printf("--------------------------------------------\npubkey[%lu]\n", i + 1); + hexdump("lms type", sigptr, 4); sigptr += 4; + hexdump("lmots type", sigptr, 4); sigptr += 4; + hexdump("I", sigptr, 16); sigptr += 16; + hexdump("T[1]", sigptr, 32); sigptr += 32; + } + + if (sigptr < siglim) { + printf("--------------------------------------------\nextra\n"); + hexdump("", sigptr, siglim - sigptr); + } + + return HAL_OK; +} + +static int test_hashsig_sign(const size_t L, + const lms_algorithm_t lms_type, + const lmots_algorithm_t lmots_type, + size_t iterations) +{ + const hal_client_handle_t client = {HAL_HANDLE_NONE}; + const hal_session_handle_t session = {HAL_HANDLE_NONE}; + hal_pkey_handle_t private_key = {HAL_HANDLE_NONE}; + hal_pkey_handle_t public_key = {HAL_HANDLE_NONE}; + hal_error_t err; + size_t len; + + { + hal_key_flags_t flags = HAL_KEY_FLAG_USAGE_DIGITALSIGNATURE; + + printf("Starting hashsig key test: L %lu, lms type %u (h=%lu), lmots type %u (w=%lu)\n", + L, lms_type, lms_type_to_h(lms_type), lmots_type, lmots_type_to_w(lmots_type)); + + if (info) + printf("Info: signature length %lu, lmots private key length %lu\n", + hal_hashsig_signature_len(L, lms_type, lmots_type), + hal_hashsig_lmots_private_key_len(lmots_type)); + + hal_uuid_t private_name, public_name; + struct timeval tv_start, tv_end, tv_diff; + + size_t Lh2 = two_to_the(L * lms_type_to_h(lms_type)); + size_t h2 = lms_type_to_h2(lms_type); + + if (info) + gettimeofday(&tv_start, NULL); + if ((err = hal_rpc_pkey_generate_hashsig(client, session, &private_key, &private_name, + L, lms_type, lmots_type, flags)) != HAL_OK) + lose("Could not generate hashsig private key: %s\n", hal_error_string(err)); + if (info) { + gettimeofday(&tv_end, NULL); + timersub(&tv_end, &tv_start, &tv_diff); + long per_key = (tv_diff.tv_sec * 1000000 + tv_diff.tv_usec) / (L * h2); + printf("Info: %ldm%ld.%03lds to generate key (%ld.%03lds per lmots key)\n", + tv_diff.tv_sec / 60, tv_diff.tv_sec % 60, tv_diff.tv_usec / 1000, + per_key / 1000000, (per_key % 1000000) / 1000); + } + + uint8_t public_der[hal_rpc_pkey_get_public_key_len(private_key)]; + + if ((err = hal_rpc_pkey_get_public_key(private_key, public_der, &len, sizeof(public_der))) != HAL_OK) + lose("Could not DER encode RPC hashsig public key from RPC hashsig private key: %s\n", hal_error_string(err)); + + assert(len == sizeof(public_der)); + + if ((err = hal_rpc_pkey_load(client, session, &public_key, &public_name, + public_der, sizeof(public_der), flags)) != HAL_OK) + lose("Could not load public key into RPC: %s\n", hal_error_string(err)); + + if (iterations > 0) { + uint8_t sig[hal_hashsig_signature_len(L, lms_type, lmots_type)]; + + if (info) + gettimeofday(&tv_start, NULL); + int i; + for (i = 0; i < iterations; ++i) { + if ((err = hal_rpc_pkey_sign(private_key, hal_hash_handle_none, + tc1_msg, sizeof(tc1_msg), sig, &len, sizeof(sig))) == HAL_OK) { + assert(len == sizeof(sig)); + if (debug) { + printf("Debug: received signature:\n"); + dump_hss_signature(sig, len); + } + } + else { + if (i == Lh2 && err == HAL_ERROR_HASHSIG_KEY_EXHAUSTED) + break; + else + lose("Could not sign (%d): %s\n", i, hal_error_string(err)); + } + } + if (info) { + gettimeofday(&tv_end, NULL); + timersub(&tv_end, &tv_start, &tv_diff); + long per_sig = (tv_diff.tv_sec * 1000000 + tv_diff.tv_usec) / i; + printf("Info: %ldm%ld.%03lds to generate %d signatures (%ld.%03lds per signature)\n", + tv_diff.tv_sec / 60, tv_diff.tv_sec % 60, tv_diff.tv_usec / 1000, i, + per_sig / 1000000, (per_sig % 1000000) / 1000); + } + + if (info) + gettimeofday(&tv_start, NULL); + if ((err = hal_rpc_pkey_verify(public_key, hal_hash_handle_none, + tc1_msg, sizeof(tc1_msg), sig, len)) != HAL_OK) + lose("Could not verify: %s\n", hal_error_string(err)); + if (info) { + gettimeofday(&tv_end, NULL); + timersub(&tv_end, &tv_start, &tv_diff); + printf("Info: %ldm%ld.%03lds to verify 1 signature\n", + tv_diff.tv_sec / 60, tv_diff.tv_sec % 60, tv_diff.tv_usec / 1000); + } + } + + if ((err = hal_rpc_pkey_delete(private_key)) != HAL_OK) + lose("Could not delete private key: %s\n", hal_error_string(err)); + + if ((err = hal_rpc_pkey_delete(public_key)) != HAL_OK) + lose("Could not delete public key: %s\n", hal_error_string(err)); + + printf("OK\n"); + return 1; + } + +fail: + if (private_key.handle != HAL_HANDLE_NONE && + (err = hal_rpc_pkey_delete(private_key)) != HAL_OK) + printf("Warning: could not delete private key: %s\n", hal_error_string(err)); + + if (public_key.handle != HAL_HANDLE_NONE && + (err = hal_rpc_pkey_delete(public_key)) != HAL_OK) + printf("Warning: could not delete public key: %s\n", hal_error_string(err)); + + return 0; +} + +int main(int argc, char *argv[]) +{ + const hal_client_handle_t client = {HAL_HANDLE_NONE}; + char *pin = "fnord"; + int do_default = 1; + int do_testvec = 0; + size_t iterations = 1; + size_t L_lo = 0, L_hi = 0; + size_t lms_lo = 5, lms_hi = 0; + size_t lmots_lo = 3, lmots_hi = 0; + char *p; + hal_error_t err; + int ok = 1; + +char usage[] = "\ +Usage: %s [-d] [-i] [-p pin] [-t] [-L n] [-l n] [-o n] [-n n]\n\ + -d: enable debugging - hexdump signatures\n\ + -i: enable informational messages - runtimes and signature lengths\n\ + -p: user PIN\n\ + -t: verify test vectors\n\ + -L: number of levels in the HSS scheme (1..8)\n\ + -l: LMS type (5..9)\n\ + -o: LM-OTS type (1..4)\n\ + -n: number of signatures to generate (0..'max')\n\ +Numeric arguments can be a single number or a range, e.g. '1..4'\n"; + + int opt; + while ((opt = getopt(argc, argv, "ditp:L:l:o:n:h?")) != -1) { + switch (opt) { + case 'd': + debug = 1; + break; + case 'i': + info = 1; + break; + case 't': + do_testvec = 1; + do_default = 0; + break; + case 'p': + pin = optarg; + break; + case 'n': + if (strcmp(optarg, "max") == 0) + iterations = (size_t)-1; + else + iterations = (size_t)atoi(optarg); + do_default = 0; + break; + case 'L': + if ((p = strtok(optarg, ".")) != NULL) + L_lo = (size_t)atoi(p); + if ((p = strtok(NULL, ".")) != NULL) + L_hi = (size_t)atoi(p); + do_default = 0; + break; + case 'l': + if ((p = strtok(optarg, ".")) != NULL) + lms_lo = (size_t)atoi(p); + if ((p = strtok(NULL, ".")) != NULL) + lms_hi = (size_t)atoi(p); + do_default = 0; + break; + case 'o': + if ((p = strtok(optarg, ".")) != NULL) + lmots_lo = (size_t)atoi(p); + if ((p = strtok(NULL, ".")) != NULL) + lmots_hi = (size_t)atoi(p); + do_default = 0; + break; + case 'h': + case '?': + fprintf(stdout, usage, argv[0]); + exit(EXIT_SUCCESS); + default: + fprintf(stderr, usage, argv[0]); + exit(EXIT_FAILURE); + } + } + + if (do_default) { + do_testvec = 1; + L_lo = 1; + } + + if (L_hi < L_lo) L_hi = L_lo; + if (lms_hi < lms_lo) lms_hi = lms_lo; + if (lmots_hi < lmots_lo) lmots_hi = lmots_lo; + + if ((err = hal_rpc_client_init()) != HAL_OK) + printf("Warning: Trouble initializing RPC client: %s\n", hal_error_string(err)); + + if ((err = hal_rpc_login(client, HAL_USER_NORMAL, pin, strlen(pin))) != HAL_OK) + printf("Warning: Trouble logging into HSM: %s\n", hal_error_string(err)); + + if (do_testvec) { + for (int i = 0; i < (sizeof(hashsig_tc)/sizeof(*hashsig_tc)); i++) + ok &= test_hashsig_testvec_local(&hashsig_tc[i], 0); + + for (int i = 0; i < (sizeof(hashsig_tc)/sizeof(*hashsig_tc)); i++) + for (int j = 0; j < 2; j++) + ok &= test_hashsig_testvec_remote(&hashsig_tc[i], j * HAL_KEY_FLAG_TOKEN); + } + + /* signing/performance tests: run with -i */ + /* A single test would be of the form '-L 2 -l 5 -o 3 -n 1' */ + /* A range test of just keygen would be of the form '-o 1..4 -n 0' */ + /* A test to key exhaustion would be of the form '-n max' */ + if (L_lo > 0) { + for (size_t L = L_lo; L <= L_hi; ++L) { + for (lms_algorithm_t lms_type = lms_lo; lms_type <= lms_hi; ++lms_type) { + for (lmots_algorithm_t lmots_type = lmots_lo; lmots_type <= lmots_hi; ++lmots_type) { + ok &= test_hashsig_sign(L, lms_type, lmots_type, iterations); + } + } + } + } + + if ((err = hal_rpc_logout(client)) != HAL_OK) + printf("Warning: Trouble logging out of HSM: %s\n", hal_error_string(err)); + + if ((err = hal_rpc_client_close()) != HAL_OK) + printf("Warning: Trouble shutting down RPC client: %s\n", hal_error_string(err)); + + return !ok; +} |