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synced 2025-01-26 03:03:22 -03:00
46 lines
1.1 KiB
C
46 lines
1.1 KiB
C
#include "impl/num.h"
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#include "impl/field.h"
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#include "impl/group.h"
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#include "impl/ecmult.h"
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#include "impl/ecdsa.h"
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void secp256k1_start(void) {
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secp256k1_fe_start();
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secp256k1_ge_start();
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secp256k1_ecmult_start();
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}
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void secp256k1_stop(void) {
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secp256k1_ecmult_stop();
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secp256k1_ge_stop();
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secp256k1_fe_stop();
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}
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int secp256k1_ecdsa_verify(const unsigned char *msg, int msglen, const unsigned char *sig, int siglen, const unsigned char *pubkey, int pubkeylen) {
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int ret = -3;
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secp256k1_num_t m;
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secp256k1_num_init(&m);
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secp256k1_ecdsa_sig_t s;
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secp256k1_ecdsa_sig_init(&s);
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secp256k1_gej_t q;
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secp256k1_num_set_bin(&m, msg, msglen);
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if (!secp256k1_ecdsa_pubkey_parse(&q, pubkey, pubkeylen)) {
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ret = -1;
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goto end;
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}
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if (!secp256k1_ecdsa_sig_parse(&s, sig, siglen)) {
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ret = -2;
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goto end;
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}
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if (!secp256k1_ecdsa_sig_verify(&s, &q, &m)) {
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ret = 0;
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goto end;
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}
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ret = 1;
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end:
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secp256k1_ecdsa_sig_free(&s);
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secp256k1_num_free(&m);
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return ret;
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}
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