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 #ifdef WITH_SIG_ECSDSA 19 20 #ifndef __ECSDSA_H__ 21 #define __ECSDSA_H__ 22 #include <libecc/words/words.h> 23 #include <libecc/sig/ec_key.h> 24 #include <libecc/utils/utils.h> 25 #include <libecc/hash/hash_algs.h> 26 #include <libecc/curves/curves.h> 27 28 #define ECSDSA_R_LEN(hsize) (hsize) 29 #define ECSDSA_S_LEN(q_bit_len) (BYTECEIL(q_bit_len)) 30 #define ECSDSA_SIGLEN(hsize, q_bit_len) (ECSDSA_R_LEN(hsize) + \ 31 ECSDSA_S_LEN(q_bit_len)) 32 #define ECSDSA_MAX_SIGLEN ECSDSA_SIGLEN(MAX_DIGEST_SIZE, CURVES_MAX_Q_BIT_LEN) 33 34 /* 35 * Compute max signature length for all the mechanisms enabled 36 * in the library (see lib_ecc_config.h). Having that done during 37 * preprocessing sadly requires some verbosity. 38 */ 39 #ifndef EC_MAX_SIGLEN 40 #define EC_MAX_SIGLEN 0 41 #endif 42 #if ((EC_MAX_SIGLEN) < (ECSDSA_MAX_SIGLEN)) 43 #undef EC_MAX_SIGLEN 44 #define EC_MAX_SIGLEN ECSDSA_MAX_SIGLEN 45 #endif 46 47 ATTRIBUTE_WARN_UNUSED_RET int ecsdsa_init_pub_key(ec_pub_key *out_pub, const ec_priv_key *in_priv); 48 49 ATTRIBUTE_WARN_UNUSED_RET int ecsdsa_siglen(u16 p_bit_len, u16 q_bit_len, u8 hsize, u8 blocksize, 50 u8 *siglen); 51 52 typedef struct { 53 hash_context h_ctx; 54 nn k; 55 word_t magic; 56 } ecsdsa_sign_data; 57 58 ATTRIBUTE_WARN_UNUSED_RET int _ecsdsa_sign_init(struct ec_sign_context *ctx); 59 60 ATTRIBUTE_WARN_UNUSED_RET int _ecsdsa_sign_update(struct ec_sign_context *ctx, 61 const u8 *chunk, u32 chunklen); 62 63 ATTRIBUTE_WARN_UNUSED_RET int _ecsdsa_sign_finalize(struct ec_sign_context *ctx, u8 *sig, u8 siglen); 64 65 typedef struct { 66 hash_context h_ctx; 67 u8 r[MAX_DIGEST_SIZE]; 68 nn s; 69 word_t magic; 70 } ecsdsa_verify_data; 71 72 ATTRIBUTE_WARN_UNUSED_RET int _ecsdsa_verify_init(struct ec_verify_context *ctx, 73 const u8 *sig, u8 siglen); 74 75 ATTRIBUTE_WARN_UNUSED_RET int _ecsdsa_verify_update(struct ec_verify_context *ctx, 76 const u8 *chunk, u32 chunklen); 77 78 ATTRIBUTE_WARN_UNUSED_RET int _ecsdsa_verify_finalize(struct ec_verify_context *ctx); 79 80 #endif /* __ECSDSA_H__ */ 81 #endif /* WITH_SIG_ECSDSA */ 82