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secp256k1
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Tweak fixes & variable name improvement

This commit is contained in:
Pieter Wuille 2013-07-14 20:46:18 +02:00
parent 86d3cce2a9
commit 350ade2ab4
1 changed files with 16 additions and 16 deletions
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32
src/secp256k1.c
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@ -156,7 +156,7 @@ int secp256k1_ecdsa_privkey_tweak_add(unsigned char *seckey, const unsigned char
secp256k1_num_t sec; secp256k1_num_t sec;
secp256k1_num_init(&sec); secp256k1_num_init(&sec);
if (ret) { if (ret) {
secp256k1_num_set_bin(&term, seckey, 32); secp256k1_num_set_bin(&sec, seckey, 32);
secp256k1_num_add(&sec, &sec, &term); secp256k1_num_add(&sec, &sec, &term);
secp256k1_num_mod(&sec, &secp256k1_ge_consts->order); secp256k1_num_mod(&sec, &secp256k1_ge_consts->order);
if (secp256k1_num_is_zero(&sec)) if (secp256k1_num_is_zero(&sec))
@ -198,34 +198,34 @@ int secp256k1_ecdsa_pubkey_tweak_add(unsigned char *pubkey, int pubkeylen, const
int secp256k1_ecdsa_privkey_tweak_mul(unsigned char *seckey, const unsigned char *tweak) { int secp256k1_ecdsa_privkey_tweak_mul(unsigned char *seckey, const unsigned char *tweak) {
int ret = 1; int ret = 1;
secp256k1_num_t term; secp256k1_num_t factor;
secp256k1_num_init(&term); secp256k1_num_init(&factor);
secp256k1_num_set_bin(&term, tweak, 32); secp256k1_num_set_bin(&factor, tweak, 32);
if (secp256k1_num_is_zero(&term)) if (secp256k1_num_is_zero(&factor))
ret = 0; ret = 0;
if (secp256k1_num_cmp(&term, &secp256k1_ge_consts->order) >= 0) if (secp256k1_num_cmp(&factor, &secp256k1_ge_consts->order) >= 0)
ret = 0; ret = 0;
secp256k1_num_t sec; secp256k1_num_t sec;
secp256k1_num_init(&sec); secp256k1_num_init(&sec);
if (ret) { if (ret) {
secp256k1_num_set_bin(&term, seckey, 32); secp256k1_num_set_bin(&sec, seckey, 32);
secp256k1_num_mod_mul(&sec, &sec, &term, &secp256k1_ge_consts->order); secp256k1_num_mod_mul(&sec, &sec, &factor, &secp256k1_ge_consts->order);
} }
if (ret) if (ret)
secp256k1_num_get_bin(seckey, 32, &sec); secp256k1_num_get_bin(seckey, 32, &sec);
secp256k1_num_free(&sec); secp256k1_num_free(&sec);
secp256k1_num_free(&term); secp256k1_num_free(&factor);
return ret; return ret;
} }
int secp256k1_ecdsa_pubkey_tweak_mul(unsigned char *pubkey, int pubkeylen, const unsigned char *tweak) { int secp256k1_ecdsa_pubkey_tweak_mul(unsigned char *pubkey, int pubkeylen, const unsigned char *tweak) {
int ret = 1; int ret = 1;
secp256k1_num_t term; secp256k1_num_t factor;
secp256k1_num_init(&term); secp256k1_num_init(&factor);
secp256k1_num_set_bin(&term, tweak, 32); secp256k1_num_set_bin(&factor, tweak, 32);
if (secp256k1_num_is_zero(&term)) if (secp256k1_num_is_zero(&factor))
ret = 0; ret = 0;
if (secp256k1_num_cmp(&term, &secp256k1_ge_consts->order) >= 0) if (secp256k1_num_cmp(&factor, &secp256k1_ge_consts->order) >= 0)
ret = 0; ret = 0;
secp256k1_ge_t p; secp256k1_ge_t p;
if (ret) { if (ret) {
@ -238,14 +238,14 @@ int secp256k1_ecdsa_pubkey_tweak_mul(unsigned char *pubkey, int pubkeylen, const
secp256k1_num_set_int(&zero, 0); secp256k1_num_set_int(&zero, 0);
secp256k1_gej_t pt; secp256k1_gej_t pt;
secp256k1_gej_set_ge(&pt, &p); secp256k1_gej_set_ge(&pt, &p);
secp256k1_ecmult(&pt, &pt, &term, &zero); secp256k1_ecmult(&pt, &pt, &factor, &zero);
secp256k1_num_free(&zero); secp256k1_num_free(&zero);
secp256k1_ge_set_gej(&p, &pt); secp256k1_ge_set_gej(&p, &pt);
int oldlen = pubkeylen; int oldlen = pubkeylen;
secp256k1_ecdsa_pubkey_serialize(&p, pubkey, &pubkeylen, oldlen <= 33); secp256k1_ecdsa_pubkey_serialize(&p, pubkey, &pubkeylen, oldlen <= 33);
assert(pubkeylen == oldlen); assert(pubkeylen == oldlen);
} }
secp256k1_num_free(&term); secp256k1_num_free(&factor);
return ret; return ret;
} }