1 /*
2 * Copyright (C) 2017 - This file is part of libecc project
3 *
4 * Authors:
5 * Ryad BENADJILA <ryadbenadjila@gmail.com>
6 * Arnaud EBALARD <arnaud.ebalard@ssi.gouv.fr>
7 * Jean-Pierre FLORI <jean-pierre.flori@ssi.gouv.fr>
8 *
9 * Contributors:
10 * Nicolas VIVET <nicolas.vivet@ssi.gouv.fr>
11 * Karim KHALFALLAH <karim.khalfallah@ssi.gouv.fr>
12 *
13 * This software is licensed under a dual BSD and GPL v2 license.
14 * See LICENSE file at the root folder of the project.
15 */
16 #include <libecc/lib_ecc_config.h>
17 #ifdef WITH_SIG_DBIGN
18
19 #if !defined(WITH_HMAC)
20 #error "DBIGN signature needs HMAC, please activate it!"
21 #endif
22 #include <libecc/hash/hmac.h>
23
24 #include <libecc/nn/nn_rand.h>
25 #include <libecc/nn/nn_mul_public.h>
26 #include <libecc/nn/nn_logical.h>
27
28 #include <libecc/sig/sig_algs_internal.h>
29 #include <libecc/sig/ec_key.h>
30 #include <libecc/utils/utils.h>
31 #ifdef VERBOSE_INNER_VALUES
32 #define EC_SIG_ALG "DBIGN"
33 #endif
34 #include <libecc/utils/dbg_sig.h>
35
dbign_init_pub_key(ec_pub_key * out_pub,const ec_priv_key * in_priv)36 int dbign_init_pub_key(ec_pub_key *out_pub, const ec_priv_key *in_priv)
37 {
38 return __bign_init_pub_key(out_pub, in_priv, DBIGN);
39 }
40
dbign_siglen(u16 p_bit_len,u16 q_bit_len,u8 hsize,u8 blocksize,u8 * siglen)41 int dbign_siglen(u16 p_bit_len, u16 q_bit_len, u8 hsize, u8 blocksize, u8 *siglen)
42 {
43 return __bign_siglen(p_bit_len, q_bit_len, hsize, blocksize, siglen);
44 }
45
_dbign_sign_init(struct ec_sign_context * ctx)46 int _dbign_sign_init(struct ec_sign_context *ctx)
47 {
48 int ret;
49
50 /* Override our random source with NULL since we want a deterministic
51 * generation.
52 */
53 MUST_HAVE((ctx != NULL), ret, err);
54
55 ctx->rand = NULL;
56 ret = __bign_sign_init(ctx, DBIGN);
57
58 err:
59 return ret;
60 }
61
_dbign_sign_update(struct ec_sign_context * ctx,const u8 * chunk,u32 chunklen)62 int _dbign_sign_update(struct ec_sign_context *ctx,
63 const u8 *chunk, u32 chunklen)
64 {
65 int ret;
66
67 /* NOTE: for deterministic ECDSA, the random source MUST be NULL, hence
68 * the following check.
69 */
70 MUST_HAVE((ctx != NULL) && (ctx->rand == NULL), ret, err);
71
72 ret = __bign_sign_update(ctx, chunk, chunklen, DBIGN);
73
74 err:
75 return ret;
76 }
77
_dbign_sign_finalize(struct ec_sign_context * ctx,u8 * sig,u8 siglen)78 int _dbign_sign_finalize(struct ec_sign_context *ctx, u8 *sig, u8 siglen)
79 {
80 int ret;
81
82 /* NOTE: for deterministic ECDSA, the random source MUST be NULL, hence
83 * the following check.
84 */
85 MUST_HAVE((ctx != NULL) && (ctx->rand == NULL), ret, err);
86
87 ret = __bign_sign_finalize(ctx, sig, siglen, DBIGN);
88
89 err:
90 return ret;
91 }
92
_dbign_verify_init(struct ec_verify_context * ctx,const u8 * sig,u8 siglen)93 int _dbign_verify_init(struct ec_verify_context *ctx, const u8 *sig, u8 siglen)
94 {
95 return __bign_verify_init(ctx, sig, siglen, DBIGN);
96 }
97
_dbign_verify_update(struct ec_verify_context * ctx,const u8 * chunk,u32 chunklen)98 int _dbign_verify_update(struct ec_verify_context *ctx,
99 const u8 *chunk, u32 chunklen)
100 {
101 return __bign_verify_update(ctx, chunk, chunklen, DBIGN);
102 }
103
_dbign_verify_finalize(struct ec_verify_context * ctx)104 int _dbign_verify_finalize(struct ec_verify_context *ctx)
105 {
106 return __bign_verify_finalize(ctx, DBIGN);
107 }
108
109 #else /* WITH_SIG_DBIGN */
110
111 /*
112 * Dummy definition to avoid the empty translation unit ISO C warning
113 */
114 typedef int dummy;
115 #endif /* WITH_SIG_DBIGN */
116