1*f0865ec9SKyle Evans /* 2*f0865ec9SKyle Evans * Copyright (C) 2021 - This file is part of libecc project 3*f0865ec9SKyle Evans * 4*f0865ec9SKyle Evans * Authors: 5*f0865ec9SKyle Evans * Ryad BENADJILA <ryadbenadjila@gmail.com> 6*f0865ec9SKyle Evans * Arnaud EBALARD <arnaud.ebalard@ssi.gouv.fr> 7*f0865ec9SKyle Evans * 8*f0865ec9SKyle Evans * This software is licensed under a dual BSD and GPL v2 license. 9*f0865ec9SKyle Evans * See LICENSE file at the root folder of the project. 10*f0865ec9SKyle Evans */ 11*f0865ec9SKyle Evans #ifndef __DSA_H__ 12*f0865ec9SKyle Evans #define __DSA_H__ 13*f0865ec9SKyle Evans 14*f0865ec9SKyle Evans /* 15*f0865ec9SKyle Evans * NOTE: although we only need libarith for DSA as we 16*f0865ec9SKyle Evans * manipulate a ring of integers, we include libsig for 17*f0865ec9SKyle Evans * the hash algorithms. 18*f0865ec9SKyle Evans */ 19*f0865ec9SKyle Evans #include <libecc/lib_ecc_config.h> 20*f0865ec9SKyle Evans 21*f0865ec9SKyle Evans /* The hash algorithms wrapper */ 22*f0865ec9SKyle Evans #include "../../hash/hash.h" 23*f0865ec9SKyle Evans 24*f0865ec9SKyle Evans /* We define hereafter the types and functions for DSA. 25*f0865ec9SKyle Evans * The notations are taken from NIST FIPS 186-4 and should be 26*f0865ec9SKyle Evans * compliant with it. 27*f0865ec9SKyle Evans */ 28*f0865ec9SKyle Evans 29*f0865ec9SKyle Evans /* DSA public key, composed of: 30*f0865ec9SKyle Evans * p the DSA prime modulus 31*f0865ec9SKyle Evans * q the DSA prime order (prime divisor of (p-1)) 32*f0865ec9SKyle Evans * g the DSA generator 33*f0865ec9SKyle Evans * y the public key = g^x (p) 34*f0865ec9SKyle Evans */ 35*f0865ec9SKyle Evans typedef struct { 36*f0865ec9SKyle Evans nn p; 37*f0865ec9SKyle Evans nn q; 38*f0865ec9SKyle Evans nn g; 39*f0865ec9SKyle Evans nn y; 40*f0865ec9SKyle Evans } dsa_pub_key; 41*f0865ec9SKyle Evans 42*f0865ec9SKyle Evans /* DSA private key, composed of: 43*f0865ec9SKyle Evans * p the DSA prime modulus 44*f0865ec9SKyle Evans * q the DSA prime order (prime divisor of (p-1)) 45*f0865ec9SKyle Evans * g the DSA generator 46*f0865ec9SKyle Evans * x the secret key 47*f0865ec9SKyle Evans */ 48*f0865ec9SKyle Evans typedef struct { 49*f0865ec9SKyle Evans nn p; 50*f0865ec9SKyle Evans nn q; 51*f0865ec9SKyle Evans nn g; 52*f0865ec9SKyle Evans nn x; 53*f0865ec9SKyle Evans } dsa_priv_key; 54*f0865ec9SKyle Evans 55*f0865ec9SKyle Evans ATTRIBUTE_WARN_UNUSED_RET int dsa_import_priv_key(dsa_priv_key *priv, const u8 *p, u16 plen, 56*f0865ec9SKyle Evans const u8 *q, u16 qlen, 57*f0865ec9SKyle Evans const u8 *g, u16 glen, 58*f0865ec9SKyle Evans const u8 *x, u16 xlen); 59*f0865ec9SKyle Evans 60*f0865ec9SKyle Evans ATTRIBUTE_WARN_UNUSED_RET int dsa_import_pub_key(dsa_pub_key *pub, const u8 *p, u16 plen, 61*f0865ec9SKyle Evans const u8 *q, u16 qlen, 62*f0865ec9SKyle Evans const u8 *g, u16 glen, 63*f0865ec9SKyle Evans const u8 *y, u16 ylen); 64*f0865ec9SKyle Evans 65*f0865ec9SKyle Evans ATTRIBUTE_WARN_UNUSED_RET int dsa_compute_pub_from_priv(dsa_pub_key *pub, 66*f0865ec9SKyle Evans const dsa_priv_key *priv); 67*f0865ec9SKyle Evans 68*f0865ec9SKyle Evans ATTRIBUTE_WARN_UNUSED_RET int dsa_sign(const dsa_priv_key *priv, const u8 *msg, u32 msglen, 69*f0865ec9SKyle Evans const u8 *nonce, u16 noncelen, 70*f0865ec9SKyle Evans u8 *sig, u16 siglen, gen_hash_alg_type dsa_hash); 71*f0865ec9SKyle Evans 72*f0865ec9SKyle Evans ATTRIBUTE_WARN_UNUSED_RET int dsa_verify(const dsa_pub_key *pub, const u8 *msg, u32 msglen, 73*f0865ec9SKyle Evans const u8 *sig, u16 siglen, gen_hash_alg_type dsa_hash); 74*f0865ec9SKyle Evans 75*f0865ec9SKyle Evans #endif /* __DSA_H__ */ 76