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This commit is contained in:
Pieter Wuille
2013-05-05 00:49:30 +02:00
parent 7823916781
commit 42cccdaf55
4 changed files with 70 additions and 4 deletions
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37
src/secp256k1.c
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@@ -64,3 +64,40 @@ int secp256k1_ecdsa_sign(const unsigned char *message, int messagelen, unsigned
secp256k1_num_free(&sec);
return ret;
}
int secp256k1_ecdsa_seckey_verify(const unsigned char *seckey) {
secp256k1_num_t sec;
secp256k1_num_init(&sec);
secp256k1_num_set_bin(&sec, seckey, 32);
int ret = secp256k1_num_is_zero(&sec) ||
(secp256k1_num_cmp(&sec, &secp256k1_ge_consts->order) >= 0);
secp256k1_num_free(&sec);
return ret;
}
int secp256k1_ecdsa_pubkey_verify(const unsigned char *pubkey, int pubkeylen) {
secp256k1_gej_t q;
return secp256k1_ecdsa_pubkey_parse(&q, pubkey, pubkeylen);
}
int secp256k1_ecdsa_pubkey_create(unsigned char *pubkey, int *pubkeylen, const unsigned char *seckey, int compressed) {
secp256k1_num_t sec;
secp256k1_num_init(&sec);
secp256k1_num_set_bin(&sec, seckey, 32);
secp256k1_gej_t pj;
secp256k1_ecmult_gen(&pj, &sec);
secp256k1_ge_t p;
secp256k1_ge_set_gej(&p, &pj);
secp256k1_ecdsa_pubkey_serialize(&p, pubkey, pubkeylen, compressed);
return 1;
}
int secp256k1_ecdsa_pubkey_decompress(unsigned char *pubkey, int *pubkeylen) {
secp256k1_gej_t pj;
if (!secp256k1_ecdsa_pubkey_parse(&pj, pubkey, *pubkeylen))
return 0;
secp256k1_ge_t p;
secp256k1_ge_set_gej(&p, &pj);
secp256k1_ecdsa_pubkey_serialize(&p, pubkey, pubkeylen, 0);
return 1;
}