/** * Copyright (c) 2013-2014 Tomas Dzetkulic * Copyright (c) 2013-2014 Pavol Rusnak * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included * in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES * OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR * OTHER DEALINGS IN THE SOFTWARE. */ #ifndef __ECDSA_H__ #define __ECDSA_H__ #include <stdint.h> #include "options.h" #include "bignum.h" // curve point x and y typedef struct { bignum256 x, y; } curve_point; typedef struct { bignum256 prime; // prime order of the finite field curve_point G; // initial curve point bignum256 order; // order of G bignum256 order_half; // order of G divided by 2 int a; // coefficient 'a' of the elliptic curve bignum256 b; // coefficient 'b' of the elliptic curve #if USE_PRECOMPUTED_CP const curve_point cp[64][8]; #endif } ecdsa_curve; #define MAX_ADDR_RAW_SIZE (4 + 20) #define MAX_WIF_RAW_SIZE (4 + 32 + 1) #define MAX_ADDR_SIZE (40) #define MAX_WIF_SIZE (58) // rfc6979 pseudo random number generator state typedef struct { uint8_t v[32], k[32]; } rfc6979_state; void point_copy(const curve_point *cp1, curve_point *cp2); void point_add(const ecdsa_curve *curve, const curve_point *cp1, curve_point *cp2); void point_double(const ecdsa_curve *curve, curve_point *cp); void point_multiply(const ecdsa_curve *curve, const bignum256 *k, const curve_point *p, curve_point *res); void point_set_infinity(curve_point *p); int point_is_infinity(const curve_point *p); int point_is_equal(const curve_point *p, const curve_point *q); int point_is_negative_of(const curve_point *p, const curve_point *q); void scalar_multiply(const ecdsa_curve *curve, const bignum256 *k, curve_point *res); int ecdh_multiply(const ecdsa_curve *curve, const uint8_t *priv_key, const uint8_t *pub_key, uint8_t *session_key); void uncompress_coords(const ecdsa_curve *curve, uint8_t odd, const bignum256 *x, bignum256 *y); int ecdsa_uncompress_pubkey(const ecdsa_curve *curve, const uint8_t *pub_key, uint8_t *uncompressed); int ecdsa_sign(const ecdsa_curve *curve, const uint8_t *priv_key, const uint8_t *msg, uint32_t msg_len, uint8_t *sig, uint8_t *pby, int (*is_canonical)(uint8_t by, uint8_t sig[64])); int ecdsa_sign_double(const ecdsa_curve *curve, const uint8_t *priv_key, const uint8_t *msg, uint32_t msg_len, uint8_t *sig, uint8_t *pby, int (*is_canonical)(uint8_t by, uint8_t sig[64])); int ecdsa_sign_digest(const ecdsa_curve *curve, const uint8_t *priv_key, const uint8_t *digest, uint8_t *sig, uint8_t *pby, int (*is_canonical)(uint8_t by, uint8_t sig[64])); void ecdsa_get_public_key33(const ecdsa_curve *curve, const uint8_t *priv_key, uint8_t *pub_key); void ecdsa_get_public_key65(const ecdsa_curve *curve, const uint8_t *priv_key, uint8_t *pub_key); void ecdsa_get_pubkeyhash(const uint8_t *pub_key, uint8_t *pubkeyhash); void ecdsa_get_address_raw(const uint8_t *pub_key, uint32_t version, uint8_t *addr_raw); void ecdsa_get_address(const uint8_t *pub_key, uint32_t version, char *addr, int addrsize); void ecdsa_get_wif(const uint8_t *priv_key, uint32_t version, char *wif, int wifsize); int ecdsa_address_decode(const char *addr, uint32_t version, uint8_t *out); int ecdsa_read_pubkey(const ecdsa_curve *curve, const uint8_t *pub_key, curve_point *pub); int ecdsa_validate_pubkey(const ecdsa_curve *curve, const curve_point *pub); int ecdsa_verify(const ecdsa_curve *curve, const uint8_t *pub_key, const uint8_t *sig, const uint8_t *msg, uint32_t msg_len); int ecdsa_verify_double(const ecdsa_curve *curve, const uint8_t *pub_key, const uint8_t *sig, const uint8_t *msg, uint32_t msg_len); int ecdsa_verify_digest(const ecdsa_curve *curve, const uint8_t *pub_key, const uint8_t *sig, const uint8_t *digest); int ecdsa_verify_digest_recover(const ecdsa_curve *curve, uint8_t *pub_key, const uint8_t *sig, const uint8_t *digest, int recid); int ecdsa_sig_to_der(const uint8_t *sig, uint8_t *der); // Private void init_k_rfc6979(const uint8_t *priv_key, const uint8_t *hash, rfc6979_state *rng); void generate_k_rfc6979(bignum256 *k, rfc6979_state *rng); void generate_k_random(bignum256 *k); #endif