C++ (Cpp) secp256k1_eckey_pubkey_tweak_mul示例

示例#1

文件： secp256k1.c 项目： TheAltcoinBoard/XAB

int secp256k1_ec_pubkey_tweak_mul(const secp256k1_context_t* ctx, unsigned char *pubkey, int pubkeylen, const unsigned char *tweak) {
    secp256k1_ge_t p;
    secp256k1_scalar_t factor;
    int ret = 0;
    int overflow = 0;
    DEBUG_CHECK(ctx != NULL);
    DEBUG_CHECK(secp256k1_ecmult_context_is_built(&ctx->ecmult_ctx));
    DEBUG_CHECK(pubkey != NULL);
    DEBUG_CHECK(tweak != NULL);

    secp256k1_scalar_set_b32(&factor, tweak, &overflow);
    if (!overflow) {
        ret = secp256k1_eckey_pubkey_parse(&p, pubkey, pubkeylen);
        if (ret) {
            ret = secp256k1_eckey_pubkey_tweak_mul(&ctx->ecmult_ctx, &p, &factor);
        }
        if (ret) {
            int oldlen = pubkeylen;
            ret = secp256k1_eckey_pubkey_serialize(&p, pubkey, &pubkeylen, oldlen <= 33);
            VERIFY_CHECK(pubkeylen == oldlen);
        }
    }

    return ret;
}

示例#2

文件： secp256k1.c 项目： aussiehash/supervanitygen

int secp256k1_ec_pubkey_tweak_mul(const secp256k1_context* ctx, secp256k1_pubkey *pubkey, const unsigned char *tweak) {
    secp256k1_ge p;
    secp256k1_scalar factor;
    int ret = 0;
    int overflow = 0;
    VERIFY_CHECK(ctx != NULL);
    ARG_CHECK(secp256k1_ecmult_context_is_built(&ctx->ecmult_ctx));
    ARG_CHECK(pubkey != NULL);
    ARG_CHECK(tweak != NULL);

    secp256k1_scalar_set_b32(&factor, tweak, &overflow);
    if (!overflow && secp256k1_pubkey_load(ctx, &p, pubkey)) {
        ret = secp256k1_eckey_pubkey_tweak_mul(&ctx->ecmult_ctx, &p, &factor);
        if (ret) {
            secp256k1_pubkey_save(pubkey, &p);
        } else {
            memset(pubkey, 0, sizeof(*pubkey));
        }
    }

    return ret;
}