C++ ARG_CHECK函数代码示例

int secp256k1_ec_privkey_negate(const secp256k1_context* ctx, unsigned char *seckey) {
    secp256k1_scalar sec;
    VERIFY_CHECK(ctx != NULL);
    ARG_CHECK(seckey != NULL);

    secp256k1_scalar_set_b32(&sec, seckey, NULL);
    secp256k1_scalar_negate(&sec, &sec);
    secp256k1_scalar_get_b32(seckey, &sec);

    return 1;
}

int secp256k1_ecdsa_signature_parse_compact(const secp256k1_context* ctx, secp256k1_ecdsa_signature* sig, const unsigned char *input64) {
    secp256k1_scalar r, s;
    int ret = 1;
    int overflow = 0;

    (void)ctx;
    ARG_CHECK(sig != NULL);
    ARG_CHECK(input64 != NULL);

    secp256k1_scalar_set_b32(&r, &input64[0], &overflow);
    ret &= !overflow;
    secp256k1_scalar_set_b32(&s, &input64[32], &overflow);
    ret &= !overflow;
    if (ret) {
        secp256k1_ecdsa_signature_save(sig, &r, &s);
    } else {
        memset(sig, 0, sizeof(*sig));
    }
    return ret;
}

int secp256k1_ec_privkey_tweak_mul(const secp256k1_context* ctx, unsigned char *seckey, const unsigned char *tweak) {
    secp256k1_scalar factor;
    secp256k1_scalar sec;
    int ret = 0;
    int overflow = 0;
    VERIFY_CHECK(ctx != NULL);
    ARG_CHECK(seckey != NULL);
    ARG_CHECK(tweak != NULL);

    secp256k1_scalar_set_b32(&factor, tweak, &overflow);
    secp256k1_scalar_set_b32(&sec, seckey, NULL);
    ret = !overflow && secp256k1_eckey_privkey_tweak_mul(&sec, &factor);
    memset(seckey, 0, 32);
    if (ret) {
        secp256k1_scalar_get_b32(seckey, &sec);
    }

    secp256k1_scalar_clear(&sec);
    secp256k1_scalar_clear(&factor);
    return ret;
}

int ffiPushStringOfLength(int srcIndex, int length)
{
	char *ptr;
	ARG_CHECK(); /* fail before allocating */
	ptr = (char*) malloc(length+1);
	if(!ptr) return primitiveFail();
	memcpy(ptr, (void*)srcIndex, length);
	ptr[length] = 0;
	ffiTempStrings[ffiTempStringCount++] = ptr;
	ARG_PUSH((int)ptr);
	return 1;
}

int secp256k1_ec_seckey_verify(const secp256k1_context* ctx, const unsigned char *seckey) {
    secp256k1_scalar sec;
    int ret;
    int overflow;
    VERIFY_CHECK(ctx != NULL);
    ARG_CHECK(seckey != NULL);

    secp256k1_scalar_set_b32(&sec, seckey, &overflow);
    ret = !overflow && !secp256k1_scalar_is_zero(&sec);
    secp256k1_scalar_clear(&sec);
    return ret;
}

int secp256k1_ec_pubkey_serialize(const secp256k1_context* ctx, unsigned char *output, size_t *outputlen, const secp256k1_pubkey* pubkey, unsigned int flags) {
    secp256k1_ge Q;
    size_t len;
    int ret = 0;

    VERIFY_CHECK(ctx != NULL);
    ARG_CHECK(outputlen != NULL);
    ARG_CHECK(*outputlen >= ((flags & SECP256K1_FLAGS_BIT_COMPRESSION) ? 33 : 65));
    len = *outputlen;
    *outputlen = 0;
    ARG_CHECK(output != NULL);
    memset(output, 0, len);
    ARG_CHECK(pubkey != NULL);
    ARG_CHECK((flags & SECP256K1_FLAGS_TYPE_MASK) == SECP256K1_FLAGS_TYPE_COMPRESSION);
    if (secp256k1_pubkey_load(ctx, &Q, pubkey)) {
        ret = secp256k1_eckey_pubkey_serialize(&Q, output, &len, flags & SECP256K1_FLAGS_BIT_COMPRESSION);
        if (ret) {
            *outputlen = len;
        }
    }
    return ret;
}

int secp256k1_ec_pubkey_create(const secp256k1_context* ctx, secp256k1_pubkey *pubkey, const unsigned char *seckey) {
    secp256k1_gej pj;
    secp256k1_ge p;
    secp256k1_scalar sec;
    int overflow;
    int ret = 0;
    VERIFY_CHECK(ctx != NULL);
    ARG_CHECK(pubkey != NULL);
    memset(pubkey, 0, sizeof(*pubkey));
    ARG_CHECK(secp256k1_ecmult_gen_context_is_built(&ctx->ecmult_gen_ctx));
    ARG_CHECK(seckey != NULL);

    secp256k1_scalar_set_b32(&sec, seckey, &overflow);
    ret = (!overflow) & (!secp256k1_scalar_is_zero(&sec));
    if (ret) {
        secp256k1_ecmult_gen(&ctx->ecmult_gen_ctx, &pj, &sec);
        secp256k1_ge_set_gej(&p, &pj);
        secp256k1_pubkey_save(pubkey, &p);
    }
    secp256k1_scalar_clear(&sec);
    return ret;
}

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;
}

int secp256k1_ec_privkey_tweak_add(const secp256k1_context* ctx, unsigned char *seckey, const unsigned char *tweak) {
    secp256k1_scalar term;
    secp256k1_scalar sec;
    int ret = 0;
    int overflow = 0;
    VERIFY_CHECK(ctx != NULL);
    ARG_CHECK(seckey != NULL);
    ARG_CHECK(tweak != NULL);
    (void)ctx;

    secp256k1_scalar_set_b32(&term, tweak, &overflow);
    secp256k1_scalar_set_b32(&sec, seckey, NULL);

    ret = !overflow && secp256k1_eckey_privkey_tweak_add(&sec, &term);
    if (ret) {
        secp256k1_scalar_get_b32(seckey, &sec);
    }

    secp256k1_scalar_clear(&sec);
    secp256k1_scalar_clear(&term);
    return ret;
}

/********************************************************************/ /**
 * Opens pictDB file and calls do_list command.
 ********************************************************************** */
int do_list_cmd(int args, char* argv[])
{
    ARG_CHECK(args, 2);

    struct pictdb_file db_file;

    int ret = do_open(argv[1], "rb", &db_file);
    if (ret == 0) {
        do_list(&db_file);
    }
    do_close(&db_file);

    return ret;
}

int secp256k1_ec_pubkey_combine(const secp256k1_context* ctx, secp256k1_pubkey *pubnonce, const secp256k1_pubkey * const *pubnonces, size_t n) {
    size_t i;
    secp256k1_gej Qj;
    secp256k1_ge Q;

    ARG_CHECK(pubnonce != NULL);
    memset(pubnonce, 0, sizeof(*pubnonce));
    ARG_CHECK(n >= 1);
    ARG_CHECK(pubnonces != NULL);

    secp256k1_gej_set_infinity(&Qj);

    for (i = 0; i < n; i++) {
        secp256k1_pubkey_load(ctx, &Q, pubnonces[i]);
        secp256k1_gej_add_ge(&Qj, &Qj, &Q);
    }
    if (secp256k1_gej_is_infinity(&Qj)) {
        return 0;
    }
    secp256k1_ge_set_gej(&Q, &Qj);
    secp256k1_pubkey_save(pubnonce, &Q);
    return 1;
}

int secp256k1_ec_pubkey_negate(const secp256k1_context* ctx, secp256k1_pubkey *pubkey) {
    int ret = 0;
    secp256k1_ge p;
    VERIFY_CHECK(ctx != NULL);
    ARG_CHECK(pubkey != NULL);

    ret = secp256k1_pubkey_load(ctx, &p, pubkey);
    memset(pubkey, 0, sizeof(*pubkey));
    if (ret) {
        secp256k1_ge_neg(&p, &p);
        secp256k1_pubkey_save(pubkey, &p);
    }
    return ret;
}

/********************************************************************/ /**
 * Deletes a picture from the database.
 */
int do_delete_cmd(int args, char* argv[])
{
    ARG_CHECK(args, 3);

    struct pictdb_file db_file;

    int ret = do_open(argv[1], "rb+", &db_file);
    if (ret == 0) {
        puts("Delete");
        ret = do_delete(&db_file, argv[2]);
    }
    do_close(&db_file);

    return ret;
}

static int secp256k1_pubkey_load(const secp256k1_context* ctx, secp256k1_ge* ge, const secp256k1_pubkey* pubkey) {
    if (sizeof(secp256k1_ge_storage) == 64) {
        /* When the secp256k1_ge_storage type is exactly 64 byte, use its
         * representation inside secp256k1_pubkey, as conversion is very fast.
         * Note that secp256k1_pubkey_save must use the same representation. */
        secp256k1_ge_storage s;
        memcpy(&s, &pubkey->data[0], sizeof(s));
        secp256k1_ge_from_storage(ge, &s);
    } else {
        /* Otherwise, fall back to 32-byte big endian for X and Y. */
        secp256k1_fe x, y;
        secp256k1_fe_set_b32(&x, pubkey->data);
        secp256k1_fe_set_b32(&y, pubkey->data + 32);
        secp256k1_ge_set_xy(ge, &x, &y);
    }
    ARG_CHECK(!secp256k1_fe_is_zero(&ge->x));
    return 1;
}

int secp256k1_ecdsa_signature_normalize(const secp256k1_context* ctx, secp256k1_ecdsa_signature *sigout, const secp256k1_ecdsa_signature *sigin) {
    secp256k1_scalar r, s;
    int ret = 0;

    VERIFY_CHECK(ctx != NULL);
    ARG_CHECK(sigin != NULL);

    secp256k1_ecdsa_signature_load(ctx, &r, &s, sigin);
    ret = secp256k1_scalar_is_high(&s);
    if (sigout != NULL) {
        if (ret) {
            secp256k1_scalar_negate(&s, &s);
        }
        secp256k1_ecdsa_signature_save(sigout, &r, &s);
    }

    return ret;
}