C++ (Cpp) secp256k1_ecdsa_sig_recover示例

示例#1

文件： secp256k1.c 项目： TheAltcoinBoard/XAB

int secp256k1_ecdsa_recover_compact(const secp256k1_context_t* ctx, const unsigned char *msg32, const unsigned char *sig64, unsigned char *pubkey, int *pubkeylen, int compressed, int recid) {
    secp256k1_ge_t q;
    secp256k1_ecdsa_sig_t sig;
    secp256k1_scalar_t m;
    int ret = 0;
    int overflow = 0;
    DEBUG_CHECK(ctx != NULL);
    DEBUG_CHECK(secp256k1_ecmult_context_is_built(&ctx->ecmult_ctx));
    DEBUG_CHECK(msg32 != NULL);
    DEBUG_CHECK(sig64 != NULL);
    DEBUG_CHECK(pubkey != NULL);
    DEBUG_CHECK(pubkeylen != NULL);
    DEBUG_CHECK(recid >= 0 && recid <= 3);

    secp256k1_scalar_set_b32(&sig.r, sig64, &overflow);
    if (!overflow) {
        secp256k1_scalar_set_b32(&sig.s, sig64 + 32, &overflow);
        if (!overflow) {
            secp256k1_scalar_set_b32(&m, msg32, NULL);

            if (secp256k1_ecdsa_sig_recover(&ctx->ecmult_ctx, &sig, &q, &m, recid)) {
                ret = secp256k1_eckey_pubkey_serialize(&q, pubkey, pubkeylen, compressed);
            }
        }
    }
    return ret;
}

示例#2

文件： secp256k1.c 项目： TheBlueMatt/secp256k1

int secp256k1_ecdsa_recover_compact(const unsigned char *msg, int msglen, const unsigned char *sig64, unsigned char *pubkey, int *pubkeylen, int compressed, int recid) {
    DEBUG_CHECK(secp256k1_ecmult_consts != NULL);
    DEBUG_CHECK(msg != NULL);
    DEBUG_CHECK(msglen <= 32);
    DEBUG_CHECK(sig64 != NULL);
    DEBUG_CHECK(pubkey != NULL);
    DEBUG_CHECK(pubkeylen != NULL);
    DEBUG_CHECK(recid >= 0 && recid <= 3);

    int ret = 0;
    secp256k1_num_t m; 
    secp256k1_num_init(&m);
    secp256k1_ecdsa_sig_t sig;
    secp256k1_ecdsa_sig_init(&sig);
    secp256k1_num_set_bin(&sig.r, sig64, 32);
    secp256k1_num_set_bin(&sig.s, sig64 + 32, 32);
    secp256k1_num_set_bin(&m, msg, msglen);

    secp256k1_ge_t q;
    if (secp256k1_ecdsa_sig_recover(&sig, &q, &m, recid)) {
        secp256k1_ecdsa_pubkey_serialize(&q, pubkey, pubkeylen, compressed);
        ret = 1;
    }
    secp256k1_ecdsa_sig_free(&sig);
    secp256k1_num_free(&m);
    return ret;
}

示例#3

文件： secp256k1.c 项目： BWallet/secp256k1

int secp256k1_ecdsa_recover_compact(const unsigned char *msg, int msglen, const unsigned char *sig64, unsigned char *pubkey, int *pubkeylen, int compressed, int recid) {
    int ret = 0;
    secp256k1_num_t m; 
    secp256k1_num_init(&m);
    secp256k1_ecdsa_sig_t sig;
    secp256k1_ecdsa_sig_init(&sig);
    secp256k1_num_set_bin(&sig.r, sig64, 32);
    secp256k1_num_set_bin(&sig.s, sig64 + 32, 32);
    secp256k1_num_set_bin(&m, msg, msglen);

    secp256k1_ge_t q;
    if (secp256k1_ecdsa_sig_recover(&sig, &q, &m, recid)) {
        secp256k1_ecdsa_pubkey_serialize(&q, pubkey, pubkeylen, compressed);
        ret = 1;
    }
    secp256k1_ecdsa_sig_free(&sig);
    secp256k1_num_free(&m);
    return ret;
}