diff options
| -rw-r--r-- | asn1_internal.h | 17 | ||||
| -rw-r--r-- | ecdsa.c | 113 | ||||
| -rw-r--r-- | hal.h | 8 | ||||
| -rw-r--r-- | rpc_pkey.c | 6 | ||||
| -rw-r--r-- | tests/test-ecdsa.c | 11 | ||||
| -rw-r--r-- | tests/test-ecdsa.h | 33 | ||||
| -rw-r--r-- | tests/test-ecdsa.py | 50 |
7 files changed, 63 insertions, 175 deletions
diff --git a/asn1_internal.h b/asn1_internal.h index bfe9372..18d4852 100644 --- a/asn1_internal.h +++ b/asn1_internal.h @@ -1,9 +1,12 @@ /* - * asn1.h - * ------ - * Library internal header file for ASN.1 routines. + * asn1_internal.h + * --------------- + * Library internal header file for ASN.1 routines. These functions + * are not part of the public libhal API. * - * These functions are not part of the public libhal API. + * The only reason for not collapsing this header file into + * hal_internal.h is to maintain some isolation between the few + * modules which use libtfm and the rest of the library. * * More than 20 years after it was written, the best simple * introduction to ASN.1 is still Burt Kalski's "A Layman's Guide to a @@ -40,8 +43,8 @@ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ -#ifndef _HAL_ASN1_H_ -#define _HAL_ASN1_H_ +#ifndef _HAL_ASN1_INTERNAL_H_ +#define _HAL_ASN1_INTERNAL_H_ #include <stdint.h> @@ -100,7 +103,7 @@ extern hal_error_t hal_asn1_encode_integer(const fp_int * const bn, extern hal_error_t hal_asn1_decode_integer(fp_int *bn, const uint8_t * const der, size_t *der_len, const size_t der_max); -#endif /* _HAL_ASN1_H_ */ +#endif /* _HAL_ASN1_INTERNAL_H_ */ /* * Local variables: @@ -1345,87 +1345,13 @@ static hal_error_t decode_signature_pkcs11(const ecdsa_curve_t * const curve, } /* - * Encode a signature in ASN.1 format SEQUENCE { INTEGER r, INTEGER s }. - */ - -static hal_error_t encode_signature_asn1(const ecdsa_curve_t * const curve, - const fp_int * const r, const fp_int * const s, - uint8_t *signature, size_t *signature_len, const size_t signature_max) -{ - assert(curve != NULL && r != NULL && s != NULL); - - size_t hlen, r_len, s_len; - hal_error_t err; - - if ((err = hal_asn1_encode_integer(r, NULL, &r_len, 0)) != HAL_OK || - (err = hal_asn1_encode_integer(s, NULL, &s_len, 0)) != HAL_OK) - return err; - - const size_t vlen = r_len + s_len; - - err = hal_asn1_encode_header(ASN1_SEQUENCE, vlen, signature, &hlen, signature_max); - - if (signature_len != NULL) - *signature_len = hlen + vlen; - - if (signature == NULL || err != HAL_OK) - return err; - - uint8_t * const r_out = signature + hlen; - uint8_t * const s_out = r_out + r_len; - - if ((err = hal_asn1_encode_integer(r, r_out, NULL, signature_max - (r_out - signature))) != HAL_OK || - (err = hal_asn1_encode_integer(s, s_out, NULL, signature_max - (s_out - signature))) != HAL_OK) - return err; - - return HAL_OK; -} - -/* - * Decode a signature from ASN.1 format SEQUENCE { INTEGER r, INTEGER s }. - */ - -static hal_error_t decode_signature_asn1(const ecdsa_curve_t * const curve, - fp_int *r, fp_int *s, - const uint8_t * const signature, const size_t signature_len) -{ - assert(curve != NULL && r != NULL && s != NULL); - - if (signature == NULL) - return HAL_ERROR_BAD_ARGUMENTS; - - size_t len1, len2; - hal_error_t err; - - if ((err = hal_asn1_decode_header(ASN1_SEQUENCE, signature, signature_len, &len1, &len2)) != HAL_OK) - return err; - - const uint8_t * der = signature + len1; - const uint8_t * const der_end = der + len2; - - if ((err = hal_asn1_decode_integer(r, der, &len1, der_end - der)) != HAL_OK) - return err; - der += len1; - - if ((err = hal_asn1_decode_integer(s, der, &len1, der_end - der)) != HAL_OK) - return err; - der += len1; - - if (der != der_end) - return HAL_ERROR_ASN1_PARSE_FAILED; - - return HAL_OK; -} - -/* * Sign a caller-supplied hash. */ hal_error_t hal_ecdsa_sign(const hal_core_t *core, const hal_ecdsa_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, - const hal_ecdsa_signature_format_t signature_format) + uint8_t *signature, size_t *signature_len, const size_t signature_max) { if (key == NULL || hash == NULL || signature == NULL || signature_len == NULL || key->type != HAL_KEY_TYPE_EC_PRIVATE) return HAL_ERROR_BAD_ARGUMENTS; @@ -1487,21 +1413,8 @@ hal_error_t hal_ecdsa_sign(const hal_core_t *core, * Encode the signature, then we're done. */ - switch (signature_format) { - - case HAL_ECDSA_SIGNATURE_FORMAT_ASN1: - if ((err = encode_signature_asn1(curve, r, s, signature, signature_len, signature_max)) != HAL_OK) - goto fail; - break; - - case HAL_ECDSA_SIGNATURE_FORMAT_PKCS11: - if ((err = encode_signature_pkcs11(curve, r, s, signature, signature_len, signature_max)) != HAL_OK) - goto fail; - break; - - default: - lose(HAL_ERROR_BAD_ARGUMENTS); - } + if ((err = encode_signature_pkcs11(curve, r, s, signature, signature_len, signature_max)) != HAL_OK) + goto fail; err = HAL_OK; @@ -1518,8 +1431,7 @@ hal_error_t hal_ecdsa_sign(const hal_core_t *core, hal_error_t hal_ecdsa_verify(const hal_core_t *core, const hal_ecdsa_key_t * const key, const uint8_t * const hash, const size_t hash_len, - const uint8_t * const signature, const size_t signature_len, - const hal_ecdsa_signature_format_t signature_format) + const uint8_t * const signature, const size_t signature_len) { assert(key != NULL && hash != NULL && signature != NULL); @@ -1551,21 +1463,8 @@ hal_error_t hal_ecdsa_verify(const hal_core_t *core, * Start by decoding the signature. */ - switch (signature_format) { - - case HAL_ECDSA_SIGNATURE_FORMAT_ASN1: - if ((err = decode_signature_asn1(curve, r, s, signature, signature_len)) != HAL_OK) - return err; - break; - - case HAL_ECDSA_SIGNATURE_FORMAT_PKCS11: - if ((err = decode_signature_pkcs11(curve, r, s, signature, signature_len)) != HAL_OK) - return err; - break; - - default: - return HAL_ERROR_BAD_ARGUMENTS; - } + if ((err = decode_signature_pkcs11(curve, r, s, signature, signature_len)) != HAL_OK) + return err; /* * Check that r and s are in the allowed range, read the hash, then @@ -435,8 +435,6 @@ extern hal_error_t hal_rsa_key_from_der(hal_rsa_key_t **key, * ECDSA. */ -typedef enum { HAL_ECDSA_SIGNATURE_FORMAT_ASN1, HAL_ECDSA_SIGNATURE_FORMAT_PKCS11 } hal_ecdsa_signature_format_t; - typedef struct hal_ecdsa_key hal_ecdsa_key_t; extern const size_t hal_ecdsa_key_t_size; @@ -495,14 +493,12 @@ extern hal_error_t hal_ecdsa_key_from_ecpoint(hal_ecdsa_key_t **key, extern hal_error_t hal_ecdsa_sign(const hal_core_t *core, const hal_ecdsa_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, - const hal_ecdsa_signature_format_t signature_format); + uint8_t *signature, size_t *signature_len, const size_t signature_max); extern hal_error_t hal_ecdsa_verify(const hal_core_t *core, const hal_ecdsa_key_t * const key, const uint8_t * const hash, const size_t hash_len, - const uint8_t * const signature, const size_t signature_len, - const hal_ecdsa_signature_format_t signature_format); + const uint8_t * const signature, const size_t signature_len); /* * Higher level RPC-based mechanism for working with HSM at arm's @@ -537,8 +537,7 @@ static hal_error_t sign_ecdsa(uint8_t *keybuf, const size_t keybuf_len, input = signature; } - if ((err = hal_ecdsa_sign(NULL, key, input, input_len, signature, signature_len, signature_max, - HAL_ECDSA_SIGNATURE_FORMAT_PKCS11)) != HAL_OK) + if ((err = hal_ecdsa_sign(NULL, key, input, input_len, signature, signature_len, signature_max)) != HAL_OK) return err; return HAL_OK; @@ -658,8 +657,7 @@ static hal_error_t verify_ecdsa(uint8_t *keybuf, const size_t keybuf_len, input = digest; } - if ((err = hal_ecdsa_verify(NULL, key, input, input_len, signature, signature_len, - HAL_ECDSA_SIGNATURE_FORMAT_PKCS11)) != HAL_OK) + if ((err = hal_ecdsa_verify(NULL, key, input, input_len, signature, signature_len)) != HAL_OK) return err; return HAL_OK; diff --git a/tests/test-ecdsa.c b/tests/test-ecdsa.c index ae99616..98b3d70 100644 --- a/tests/test-ecdsa.c +++ b/tests/test-ecdsa.c @@ -150,13 +150,13 @@ static int test_against_static_vectors(const ecdsa_tc_t * const tc) uint8_t sig[tc->sig_len + 4]; size_t sig_len; - if ((err = hal_ecdsa_sign(NULL, key1, tc->H, tc->H_len, sig, &sig_len, sizeof(sig), HAL_ECDSA_SIGNATURE_FORMAT_ASN1)) != HAL_OK) + if ((err = hal_ecdsa_sign(NULL, key1, tc->H, tc->H_len, sig, &sig_len, sizeof(sig))) != HAL_OK) return printf("hal_ecdsa_sign() failed: %s\n", hal_error_string(err)), 0; if (sig_len != tc->sig_len || memcmp(sig, tc->sig, tc->sig_len) != 0) return printf("Signature mismatch\n"), 0; - if ((err = hal_ecdsa_verify(NULL, key2, tc->H, tc->H_len, sig, sig_len, HAL_ECDSA_SIGNATURE_FORMAT_ASN1)) != HAL_OK) + if ((err = hal_ecdsa_verify(NULL, key2, tc->H, tc->H_len, sig, sig_len)) != HAL_OK) return printf("hal_ecdsa_verify(private) failed: %s\n", hal_error_string(err)), 0; hal_ecdsa_key_clear(key2); @@ -176,7 +176,7 @@ static int test_against_static_vectors(const ecdsa_tc_t * const tc) tc->Qx, tc->Qx_len, tc->Qy, tc->Qy_len)) != HAL_OK) return printf("hal_ecdsa_load_public() failed: %s\n", hal_error_string(err)), 0; - if ((err = hal_ecdsa_verify(NULL, key2, tc->H, tc->H_len, sig, sig_len, HAL_ECDSA_SIGNATURE_FORMAT_ASN1)) != HAL_OK) + if ((err = hal_ecdsa_verify(NULL, key2, tc->H, tc->H_len, sig, sig_len)) != HAL_OK) return printf("hal_ecdsa_verify(public) failed: %s\n", hal_error_string(err)), 0; uint8_t point[hal_ecdsa_key_to_ecpoint_len(key1)]; @@ -263,13 +263,12 @@ static int test_keygen_sign_verify(const hal_curve_name_t curve) printf("Signing\n"); if ((err = hal_ecdsa_sign(NULL, key, hashbuf, sizeof(hashbuf), - sigbuf, &siglen, sizeof(sigbuf), HAL_ECDSA_SIGNATURE_FORMAT_ASN1)) != HAL_OK) + sigbuf, &siglen, sizeof(sigbuf))) != HAL_OK) return printf("hal_ecdsa_sign() failed: %s\n", hal_error_string(err)), 0; printf("Verifying\n"); - if ((err = hal_ecdsa_verify(NULL, key, hashbuf, sizeof(hashbuf), - sigbuf, siglen, HAL_ECDSA_SIGNATURE_FORMAT_ASN1)) != HAL_OK) + if ((err = hal_ecdsa_verify(NULL, key, hashbuf, sizeof(hashbuf), sigbuf, siglen)) != HAL_OK) return printf("hal_ecdsa_verify() failed: %s\n", hal_error_string(err)), 0; return 1; diff --git a/tests/test-ecdsa.h b/tests/test-ecdsa.h index a607d97..9fafe18 100644 --- a/tests/test-ecdsa.h +++ b/tests/test-ecdsa.h @@ -89,13 +89,13 @@ static const uint8_t p256_s[] = { /* 32 bytes */ 0x92, 0xdb, 0xea, 0xa1, 0xaf, 0x2b, 0xc3, 0x67 }; -static const uint8_t p256_sig[] = { /* 70 bytes */ - 0x30, 0x44, 0x02, 0x20, 0x72, 0x14, 0xbc, 0x96, 0x47, 0x16, 0x0b, 0xbd, - 0x39, 0xff, 0x2f, 0x80, 0x53, 0x3f, 0x5d, 0xc6, 0xdd, 0xd7, 0x0d, 0xdf, - 0x86, 0xbb, 0x81, 0x56, 0x61, 0xe8, 0x05, 0xd5, 0xd4, 0xe6, 0xf2, 0x7c, - 0x02, 0x20, 0x7d, 0x1f, 0xf9, 0x61, 0x98, 0x0f, 0x96, 0x1b, 0xda, 0xa3, - 0x23, 0x3b, 0x62, 0x09, 0xf4, 0x01, 0x33, 0x17, 0xd3, 0xe3, 0xf9, 0xe1, - 0x49, 0x35, 0x92, 0xdb, 0xea, 0xa1, 0xaf, 0x2b, 0xc3, 0x67 +static const uint8_t p256_sig[] = { /* 64 bytes */ + 0x72, 0x14, 0xbc, 0x96, 0x47, 0x16, 0x0b, 0xbd, 0x39, 0xff, 0x2f, 0x80, + 0x53, 0x3f, 0x5d, 0xc6, 0xdd, 0xd7, 0x0d, 0xdf, 0x86, 0xbb, 0x81, 0x56, + 0x61, 0xe8, 0x05, 0xd5, 0xd4, 0xe6, 0xf2, 0x7c, 0x7d, 0x1f, 0xf9, 0x61, + 0x98, 0x0f, 0x96, 0x1b, 0xda, 0xa3, 0x23, 0x3b, 0x62, 0x09, 0xf4, 0x01, + 0x33, 0x17, 0xd3, 0xe3, 0xf9, 0xe1, 0x49, 0x35, 0x92, 0xdb, 0xea, 0xa1, + 0xaf, 0x2b, 0xc3, 0x67 }; static const uint8_t p256_u1[] = { /* 32 bytes */ @@ -223,16 +223,15 @@ static const uint8_t p384_s[] = { /* 48 bytes */ 0x67, 0xad, 0xad, 0xf1, 0x68, 0xeb, 0xbe, 0x80, 0x37, 0x94, 0xa4, 0x02 }; -static const uint8_t p384_sig[] = { /* 103 bytes */ - 0x30, 0x65, 0x02, 0x31, 0x00, 0xa0, 0xc2, 0x7e, 0xc8, 0x93, 0x09, 0x2d, - 0xea, 0x1e, 0x1b, 0xd2, 0xcc, 0xfe, 0xd3, 0xcf, 0x94, 0x5c, 0x81, 0x34, - 0xed, 0x0c, 0x9f, 0x81, 0x31, 0x1a, 0x0f, 0x4a, 0x05, 0x94, 0x2d, 0xb8, - 0xdb, 0xed, 0x8d, 0xd5, 0x9f, 0x26, 0x74, 0x71, 0xd5, 0x46, 0x2a, 0xa1, - 0x4f, 0xe7, 0x2d, 0xe8, 0x56, 0x02, 0x30, 0x20, 0xab, 0x3f, 0x45, 0xb7, - 0x4f, 0x10, 0xb6, 0xe1, 0x1f, 0x96, 0xa2, 0xc8, 0xeb, 0x69, 0x4d, 0x20, - 0x6b, 0x9d, 0xda, 0x86, 0xd3, 0xc7, 0xe3, 0x31, 0xc2, 0x6b, 0x22, 0xc9, - 0x87, 0xb7, 0x53, 0x77, 0x26, 0x57, 0x76, 0x67, 0xad, 0xad, 0xf1, 0x68, - 0xeb, 0xbe, 0x80, 0x37, 0x94, 0xa4, 0x02 +static const uint8_t p384_sig[] = { /* 96 bytes */ + 0xa0, 0xc2, 0x7e, 0xc8, 0x93, 0x09, 0x2d, 0xea, 0x1e, 0x1b, 0xd2, 0xcc, + 0xfe, 0xd3, 0xcf, 0x94, 0x5c, 0x81, 0x34, 0xed, 0x0c, 0x9f, 0x81, 0x31, + 0x1a, 0x0f, 0x4a, 0x05, 0x94, 0x2d, 0xb8, 0xdb, 0xed, 0x8d, 0xd5, 0x9f, + 0x26, 0x74, 0x71, 0xd5, 0x46, 0x2a, 0xa1, 0x4f, 0xe7, 0x2d, 0xe8, 0x56, + 0x20, 0xab, 0x3f, 0x45, 0xb7, 0x4f, 0x10, 0xb6, 0xe1, 0x1f, 0x96, 0xa2, + 0xc8, 0xeb, 0x69, 0x4d, 0x20, 0x6b, 0x9d, 0xda, 0x86, 0xd3, 0xc7, 0xe3, + 0x31, 0xc2, 0x6b, 0x22, 0xc9, 0x87, 0xb7, 0x53, 0x77, 0x26, 0x57, 0x76, + 0x67, 0xad, 0xad, 0xf1, 0x68, 0xeb, 0xbe, 0x80, 0x37, 0x94, 0xa4, 0x02 }; static const uint8_t p384_u1[] = { /* 48 bytes */ diff --git a/tests/test-ecdsa.py b/tests/test-ecdsa.py index 1ecfef9..efd96e3 100644 --- a/tests/test-ecdsa.py +++ b/tests/test-ecdsa.py @@ -50,38 +50,31 @@ from pyasn1.codec.der.decoder import decode as DER_Decode wrapper = TextWrapper(width = 78, initial_indent = " " * 2, subsequent_indent = " " * 2) -def long_to_bytes(l): +def long_to_bytes(number, order): # # This is just plain nasty. # - s = "%x" % l - return ("0" + s if len(s) & 1 else s).decode("hex") + s = "%x" % number + s = ("0" * (order/8 - len(s))) + s + return s.decode("hex") -def bytes_to_bits(b): +def bytes_to_bits(bytes): # # This, on the other hand, is not just plain nasty, this is fancy nasty. # This is nasty with raisins in it. # - bits = bin(long(b.encode("hex"), 16))[2:] - if len(bits) % 8: - bits = ("0" * (8 - len(bits) % 8)) + bits - return tuple(int(i) for i in bits) + s = bin(long(bytes.encode("hex"), 16))[2:] + if len(s) % 8: + s = ("0" * (8 - len(s) % 8)) + s + return tuple(int(i) for i in s) ### -class ECDSA_Sig_Value(Sequence): - componentType = NamedTypes( - NamedType("r", Integer()), - NamedType("s", Integer())) - -def encode_sig(r, s): - sig = ECDSA_Sig_Value() - sig["r"] = r - sig["s"] = s - return DER_Encode(sig) +def encode_sig(r, s, order): + return long_to_bytes(r, order) + long_to_bytes(s, order) -p256_sig = encode_sig(p256_r, p256_s) -p384_sig = encode_sig(p384_r, p384_s) +p256_sig = encode_sig(p256_r, p256_s, 256) +p384_sig = encode_sig(p384_r, p384_s, 384) ### @@ -93,9 +86,9 @@ class ECPrivateKey(Sequence): OptionalNamedType("parameters", ObjectIdentifier().subtype(explicitTag = Tag(tagClassContext, tagFormatSimple, 0))), OptionalNamedType("publicKey", BitString().subtype(explicitTag = Tag(tagClassContext, tagFormatSimple, 1)))) -def encode_key(d, Qx, Qy, oid): - private_key = long_to_bytes(d) - public_key = bytes_to_bits(chr(0x04) + long_to_bytes(Qx) + long_to_bytes(Qy)) +def encode_key(d, Qx, Qy, order, oid): + private_key = long_to_bytes(d, order) + public_key = bytes_to_bits(chr(0x04) + long_to_bytes(Qx, order) + long_to_bytes(Qy, order)) parameters = oid key = ECPrivateKey() key["version"] = 1 @@ -104,8 +97,8 @@ def encode_key(d, Qx, Qy, oid): key["publicKey"] = public_key return DER_Encode(key) -p256_key = encode_key(p256_d, p256_Qx, p256_Qy, "1.2.840.10045.3.1.7") -p384_key = encode_key(p384_d, p384_Qx, p384_Qy, "1.3.132.0.34") +p256_key = encode_key(p256_d, p256_Qx, p256_Qy, 256, "1.2.840.10045.3.1.7") +p384_key = encode_key(p384_d, p384_Qx, p384_Qy, 384, "1.3.132.0.34") ### @@ -125,11 +118,12 @@ for name in dir(): vars = sorted(vars) for curve in curves: + order = int(curve[1:]) for var in vars: name = curve + "_" + var value = globals().get(name, None) if isinstance(value, (int, long)): - value = long_to_bytes(value) + value = long_to_bytes(value, order) if value is not None: print print "static const uint8_t %s[] = { /* %d bytes */" % (name, len(value)) @@ -138,14 +132,14 @@ for curve in curves: print print "typedef struct {" -print " hal_ecdsa_curve_t curve;" +print " hal_curve_name_t curve;" for var in vars: print " const uint8_t *%8s; size_t %8s_len;" % (var, var) print "} ecdsa_tc_t;" print print "static const ecdsa_tc_t ecdsa_tc[] = {" for curve in curves: - print " { HAL_ECDSA_CURVE_%s," % curve.upper() + print " { HAL_CURVE_%s," % curve.upper() for var in vars: name = curve + "_" + var if name in globals(): |