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-rw-r--r--hal_rpc.c324
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-/*
- * hal_rpc.c
- * ---------
- * Remote procedure call public API implementation.
- *
- * Authors: Rob Austein
- * Copyright (c) 2015, 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 "rpc_internal.h"
-
-#ifndef HAL_RPC_IS_CLIENT
-#warning HAL_RPC_IS_CLIENT not set, assuming we're building for the HSM
-#define HAL_RPC_IS_CLIENT 0
-#endif
-
-/*
- * Maybe we'll let the client configure this at runtime, later. For
- * now, wire in the obvious defaults: hashing is done locally,
- * everything else is done via RPC. For the server everything is
- * always done locally.
- */
-
-#if HAL_RPC_IS_CLIENT
-
-static const hal_rpc_misc_dispatch_t * const misc_dispatch = &hal_rpc_remote_misc_dispatch;
-static const hal_rpc_hash_dispatch_t * const hash_dispatch = &hal_rpc_remote_hash_dispatch;
-static const hal_rpc_pkey_dispatch_t * const pkey_dispatch = &hal_rpc_mixed_pkey_dispatch;
-
-#else
-
-static const hal_rpc_misc_dispatch_t * const misc_dispatch = &hal_rpc_local_misc_dispatch;
-static const hal_rpc_hash_dispatch_t * const hash_dispatch = &hal_rpc_local_hash_dispatch;
-static const hal_rpc_pkey_dispatch_t * const pkey_dispatch = &hal_rpc_local_pkey_dispatch;
-
-#endif
-
-const hal_rpc_hash_handle_t hal_rpc_hash_handle_none = {0};
-
-static inline int check_pkey_type(const hal_rpc_pkey_key_type_t type)
-{
- switch (type) {
- case HAL_RPC_PKEY_RSA_PRIVATE:
- case HAL_RPC_PKEY_RSA_PUBLIC:
- case HAL_RPC_PKEY_ECDSA_PRIVATE:
- case HAL_RPC_PKEY_ECDSA_PUBLIC:
- return 1;
- default:
- return 0;
- }
-}
-
-static inline int check_pkey_flags(const hal_rpc_pkey_flags_t flags)
-{
- return (flags &~ (HAL_RPC_PKEY_FLAG_USAGE_DIGITALSIGNATURE |
- HAL_RPC_PKEY_FLAG_USAGE_KEYENCIPHERMENT |
- HAL_RPC_PKEY_FLAG_USAGE_DATAENCIPHERMENT)) == 0;
-}
-
-static inline int check_pkey_type_curve_flags(const hal_rpc_pkey_key_type_t type,
- const hal_rpc_pkey_curve_t curve,
- const hal_rpc_pkey_flags_t flags)
-{
- if (!check_pkey_flags(flags))
- return 0;
-
- switch (type) {
-
- case HAL_RPC_PKEY_RSA_PRIVATE:
- case HAL_RPC_PKEY_RSA_PUBLIC:
- return curve == HAL_RPC_PKEY_CURVE_NONE;
-
- case HAL_RPC_PKEY_ECDSA_PRIVATE:
- case HAL_RPC_PKEY_ECDSA_PUBLIC:
- switch (curve) {
- case HAL_RPC_PKEY_CURVE_ECDSA_P256:
- case HAL_RPC_PKEY_CURVE_ECDSA_P384:
- case HAL_RPC_PKEY_CURVE_ECDSA_P521:
- return 1;
- default:
- return 0;
- }
-
- default:
- return 0;
- }
-}
-
-
-hal_error_t hal_rpc_get_random(void *buffer, const size_t length)
-{
- if (buffer == NULL)
- return HAL_ERROR_BAD_ARGUMENTS;
- if (length == 0)
- return HAL_OK;
- return misc_dispatch->get_random(buffer, length);
-}
-
-#warning Perhaps we should be enforcing a minimum PIN length here
-
-hal_error_t hal_rpc_set_pin(const hal_rpc_user_t which,
- const char * const newpin, const size_t newpin_len)
-{
- if (newpin == NULL || newpin_len == 0 || (which != HAL_RPC_USER_NORMAL && which != HAL_RPC_USER_SO))
- return HAL_ERROR_BAD_ARGUMENTS;
- return misc_dispatch->set_pin(which, newpin, newpin_len);
-}
-
-hal_error_t hal_rpc_login(const hal_rpc_client_handle_t client,
- const hal_rpc_user_t user,
- const char * const pin, const size_t pin_len)
-{
- if (pin == NULL || pin_len == 0 || (user != HAL_RPC_USER_NORMAL && user != HAL_RPC_USER_SO))
- return HAL_ERROR_BAD_ARGUMENTS;
- return misc_dispatch->login(client, user, pin, pin_len);
-}
-
-hal_error_t hal_rpc_logout(const hal_rpc_client_handle_t client)
-{
- return misc_dispatch->logout(client);
-}
-
-hal_error_t hal_rpc_hash_get_digest_length(const hal_digest_algorithm_t alg, size_t *length)
-{
- if (length == NULL)
- return HAL_ERROR_BAD_ARGUMENTS;
- return hash_dispatch->get_digest_length(alg, length);
-}
-
-hal_error_t hal_rpc_hash_get_digest_algorithm_id(const hal_digest_algorithm_t alg,
- uint8_t *id, size_t *len, const size_t len_max)
-{
- return hash_dispatch->get_digest_algorithm_id(alg, id, len, len_max);
-}
-
-hal_error_t hal_rpc_hash_get_algorithm(const hal_rpc_hash_handle_t hash, hal_digest_algorithm_t *alg)
-{
- if (hash.handle == hal_rpc_hash_handle_none.handle || alg == NULL)
- return HAL_ERROR_BAD_ARGUMENTS;
- return hash_dispatch->get_algorithm(hash, alg);
-}
-
-hal_error_t hal_rpc_hash_initialize(const hal_rpc_client_handle_t client,
- const hal_rpc_session_handle_t session,
- hal_rpc_hash_handle_t *hash,
- const hal_digest_algorithm_t alg,
- const uint8_t * const key, const size_t key_len)
-{
- if (hash == NULL)
- return HAL_ERROR_BAD_ARGUMENTS;
- return hash_dispatch->initialize(client, session, hash, alg, key, key_len);
-}
-
-hal_error_t hal_rpc_hash_update(const hal_rpc_hash_handle_t hash,
- const uint8_t * data, const size_t length)
-{
- if (hash.handle == hal_rpc_hash_handle_none.handle || data == NULL)
- return HAL_ERROR_BAD_ARGUMENTS;
- if (length == 0)
- return HAL_OK;
- return hash_dispatch->update(hash, data, length);
-}
-
-hal_error_t hal_rpc_hash_finalize(const hal_rpc_hash_handle_t hash,
- uint8_t *digest, const size_t length)
-{
- if (hash.handle == hal_rpc_hash_handle_none.handle || digest == NULL || length == 0)
- return HAL_ERROR_BAD_ARGUMENTS;
- return hash_dispatch->finalize(hash, digest, length);
-}
-
-hal_error_t hal_rpc_pkey_load(const hal_rpc_client_handle_t client,
- const hal_rpc_session_handle_t session,
- hal_rpc_pkey_handle_t *pkey,
- const hal_rpc_pkey_key_type_t type,
- const hal_rpc_pkey_curve_t curve,
- const uint8_t * const name, const size_t name_len,
- const uint8_t * const der, const size_t der_len,
- const hal_rpc_pkey_flags_t flags)
-{
- if (pkey == NULL ||
- name == NULL || name_len == 0 ||
- der == NULL || der_len == 0 ||
- !check_pkey_type_curve_flags(type, curve, flags))
- return HAL_ERROR_BAD_ARGUMENTS;
- return pkey_dispatch->load(client, session, pkey, type, curve, name, name_len, der, der_len, flags);
-}
-
-hal_error_t hal_rpc_pkey_find(const hal_rpc_client_handle_t client,
- const hal_rpc_session_handle_t session,
- hal_rpc_pkey_handle_t *pkey,
- const hal_rpc_pkey_key_type_t type,
- const uint8_t * const name, const size_t name_len)
-{
- if (pkey == NULL || name == NULL || name_len == 0 || !check_pkey_type(type))
- return HAL_ERROR_BAD_ARGUMENTS;
- return pkey_dispatch->find(client, session, pkey, type, name, name_len);
-}
-
-hal_error_t hal_rpc_pkey_generate_rsa(const hal_rpc_client_handle_t client,
- const hal_rpc_session_handle_t session,
- hal_rpc_pkey_handle_t *pkey,
- const uint8_t * const name, const size_t name_len,
- const unsigned key_len,
- const uint8_t * const exp, const size_t exp_len,
- const hal_rpc_pkey_flags_t flags)
-{
- if (pkey == NULL || name == NULL || name_len == 0 || key_len == 0 ||
- exp == NULL || exp_len == 0 || !check_pkey_flags(flags))
- return HAL_ERROR_BAD_ARGUMENTS;
- return pkey_dispatch->generate_rsa(client, session, pkey, name, name_len, key_len, exp, exp_len, flags);
-}
-
-hal_error_t hal_rpc_pkey_generate_ec(const hal_rpc_client_handle_t client,
- const hal_rpc_session_handle_t session,
- hal_rpc_pkey_handle_t *pkey,
- const uint8_t * const name, const size_t name_len,
- const hal_rpc_pkey_curve_t curve,
- const hal_rpc_pkey_flags_t flags)
-{
- if (pkey == NULL || name == NULL || name_len == 0 ||
- !check_pkey_type_curve_flags(HAL_RPC_PKEY_ECDSA_PRIVATE, curve, flags))
- return HAL_ERROR_BAD_ARGUMENTS;
- return pkey_dispatch->generate_ec(client, session, pkey, name, name_len, curve, flags);
-}
-
-hal_error_t hal_rpc_pkey_delete(const hal_rpc_pkey_handle_t pkey)
-{
- return pkey_dispatch->delete(pkey);
-}
-
-hal_error_t hal_rpc_pkey_get_key_type(const hal_rpc_pkey_handle_t pkey,
- hal_rpc_pkey_key_type_t *type)
-{
- if (type == NULL)
- return HAL_ERROR_BAD_ARGUMENTS;
- return pkey_dispatch->get_key_type(pkey, type);
-}
-
-hal_error_t hal_rpc_pkey_get_key_flags(const hal_rpc_pkey_handle_t pkey,
- hal_rpc_pkey_flags_t *flags)
-{
- if (flags == NULL)
- return HAL_ERROR_BAD_ARGUMENTS;
- return pkey_dispatch->get_key_flags(pkey, flags);
-}
-
-size_t hal_rpc_pkey_get_public_key_len(const hal_rpc_pkey_handle_t pkey)
-{
- return pkey_dispatch->get_public_key_len(pkey);
-}
-
-hal_error_t hal_rpc_pkey_get_public_key(const hal_rpc_pkey_handle_t pkey,
- uint8_t *der, size_t *der_len, const size_t der_len_max)
-{
- if (der == NULL || der_len == NULL || der_len_max == 0)
- return HAL_ERROR_BAD_ARGUMENTS;
- return pkey_dispatch->get_public_key(pkey, der, der_len, der_len_max);
-}
-
-hal_error_t hal_rpc_pkey_sign(const hal_rpc_session_handle_t session,
- const hal_rpc_pkey_handle_t pkey,
- const hal_rpc_hash_handle_t hash,
- const uint8_t * const input, const size_t input_len,
- uint8_t * output, const size_t output_len)
-{
- if (output == NULL || output_len == 0 ||
- (hash.handle == hal_rpc_hash_handle_none.handle) == (input == NULL || input_len == 0))
- return HAL_ERROR_BAD_ARGUMENTS;
- return pkey_dispatch->sign(session, pkey, hash, input, input_len, output, output_len);
-}
-
-hal_error_t hal_rpc_pkey_verify(const hal_rpc_session_handle_t session,
- const hal_rpc_pkey_handle_t pkey,
- const hal_rpc_hash_handle_t hash,
- const uint8_t * const input, const size_t input_len,
- uint8_t * output, const size_t output_len)
-{
- if (output == NULL || output_len == 0 ||
- (hash.handle == hal_rpc_hash_handle_none.handle) == (input == NULL || input_len == 0))
- return HAL_ERROR_BAD_ARGUMENTS;
- return pkey_dispatch->verify(session, pkey, hash, input, input_len, output, output_len);
-}
-
-hal_error_t hal_rpc_pkey_list(hal_rpc_pkey_key_info_t *result,
- unsigned *result_len,
- const unsigned result_max)
-{
- if (result == NULL || result_len == NULL || result_max == 0)
- return HAL_ERROR_BAD_ARGUMENTS;
- return pkey_dispatch->list(result, result_len, result_max);
-}
-
-/*
- * Local variables:
- * indent-tabs-mode: nil
- * End:
- */