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 #include <libecc/lib_ecc_types.h> 18 #if defined(WITH_SIG_ECDSA) || defined(WITH_SIG_DECDSA) 19 20 #ifndef __ECDSA_COMMON_H__ 21 #define __ECDSA_COMMON_H__ 22 23 #include <libecc/words/words.h> 24 #include <libecc/sig/ec_key.h> 25 #include <libecc/hash/hash_algs.h> 26 #include <libecc/curves/curves.h> 27 #include <libecc/utils/utils.h> 28 29 #define ECDSA_R_LEN(q_bit_len) (BYTECEIL(q_bit_len)) 30 #define ECDSA_S_LEN(q_bit_len) (BYTECEIL(q_bit_len)) 31 #define ECDSA_SIGLEN(q_bit_len) (ECDSA_R_LEN(q_bit_len) + \ 32 ECDSA_S_LEN(q_bit_len)) 33 #define ECDSA_MAX_SIGLEN ECDSA_SIGLEN(CURVES_MAX_Q_BIT_LEN) 34 35 /* 36 * Compute max signature length for all the mechanisms enabled 37 * in the library (see lib_ecc_config.h). Having that done during 38 * preprocessing sadly requires some verbosity. 39 */ 40 #ifndef EC_MAX_SIGLEN 41 #define EC_MAX_SIGLEN 0 42 #endif 43 #if ((EC_MAX_SIGLEN) < (ECDSA_MAX_SIGLEN)) 44 #undef EC_MAX_SIGLEN 45 #define EC_MAX_SIGLEN ECDSA_MAX_SIGLEN 46 #endif 47 48 typedef struct { 49 hash_context h_ctx; 50 word_t magic; 51 } ecdsa_sign_data; 52 53 struct ec_sign_context; 54 55 ATTRIBUTE_WARN_UNUSED_RET int __ecdsa_init_pub_key(ec_pub_key *out_pub, const ec_priv_key *in_priv, ec_alg_type key_type); 56 57 ATTRIBUTE_WARN_UNUSED_RET int __ecdsa_siglen(u16 p_bit_len, u16 q_bit_len, u8 hsize, u8 blocksize, u8 *siglen); 58 59 ATTRIBUTE_WARN_UNUSED_RET int __ecdsa_sign_init(struct ec_sign_context *ctx, ec_alg_type key_type); 60 61 ATTRIBUTE_WARN_UNUSED_RET int __ecdsa_sign_update(struct ec_sign_context *ctx, 62 const u8 *chunk, u32 chunklen, ec_alg_type key_type); 63 64 ATTRIBUTE_WARN_UNUSED_RET int __ecdsa_sign_finalize(struct ec_sign_context *ctx, u8 *sig, u8 siglen, ec_alg_type key_type); 65 66 typedef struct { 67 nn r; 68 nn s; 69 hash_context h_ctx; 70 word_t magic; 71 } ecdsa_verify_data; 72 73 struct ec_verify_context; 74 75 ATTRIBUTE_WARN_UNUSED_RET int __ecdsa_verify_init(struct ec_verify_context *ctx, 76 const u8 *sig, u8 siglen, ec_alg_type key_type); 77 78 ATTRIBUTE_WARN_UNUSED_RET int __ecdsa_verify_update(struct ec_verify_context *ctx, 79 const u8 *chunk, u32 chunklen, ec_alg_type key_type); 80 81 ATTRIBUTE_WARN_UNUSED_RET int __ecdsa_verify_finalize(struct ec_verify_context *ctx, ec_alg_type key_type); 82 83 ATTRIBUTE_WARN_UNUSED_RET int __ecdsa_public_key_from_sig(ec_pub_key *out_pub1, ec_pub_key *out_pub2, const ec_params *params, 84 const u8 *sig, u8 siglen, const u8 *hash, u8 hsize, 85 ec_alg_type key_type); 86 87 #endif /* __ECDSA_COMMON_H__ */ 88 #endif /* defined(WITH_SIG_ECDSA) || defined(WITH_SIG_DECDSA) */ 89