Differential D7640 Diff 23968 src/secp256k1/src/secp256k1.c

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src/secp256k1/src/secp256k1.c

Show First 20 Lines • Show All 626 Lines • ▼ Show 20 Lines	int secp256k1_ec_seckey_tweak_add(const secp256k1_context* ctx, unsigned char seckey, const unsigned char tweak) {
secp256k1_scalar_clear(&term);		secp256k1_scalar_clear(&term);
return ret;		return ret;
}		}

int secp256k1_ec_privkey_tweak_add(const secp256k1_context* ctx, unsigned char seckey, const unsigned char tweak) {		int secp256k1_ec_privkey_tweak_add(const secp256k1_context* ctx, unsigned char seckey, const unsigned char tweak) {
return secp256k1_ec_seckey_tweak_add(ctx, seckey, tweak);		return secp256k1_ec_seckey_tweak_add(ctx, seckey, tweak);
}		}

		static int secp256k1_ec_pubkey_tweak_add_helper(const secp256k1_ecmult_context* ecmult_ctx, secp256k1_ge p, const unsigned char tweak) {
		secp256k1_scalar term;
		int overflow = 0;
		secp256k1_scalar_set_b32(&term, tweak, &overflow);
		return !overflow && secp256k1_eckey_pubkey_tweak_add(ecmult_ctx, p, &term);
		}

int secp256k1_ec_pubkey_tweak_add(const secp256k1_context* ctx, secp256k1_pubkey pubkey, const unsigned char tweak) {		int secp256k1_ec_pubkey_tweak_add(const secp256k1_context* ctx, secp256k1_pubkey pubkey, const unsigned char tweak) {
secp256k1_ge p;		secp256k1_ge p;
secp256k1_scalar term;
int ret = 0;		int ret = 0;
int overflow = 0;
VERIFY_CHECK(ctx != NULL);		VERIFY_CHECK(ctx != NULL);
ARG_CHECK(secp256k1_ecmult_context_is_built(&ctx->ecmult_ctx));		ARG_CHECK(secp256k1_ecmult_context_is_built(&ctx->ecmult_ctx));
ARG_CHECK(pubkey != NULL);		ARG_CHECK(pubkey != NULL);
ARG_CHECK(tweak != NULL);		ARG_CHECK(tweak != NULL);

secp256k1_scalar_set_b32(&term, tweak, &overflow);		ret = secp256k1_pubkey_load(ctx, &p, pubkey);
ret = !overflow && secp256k1_pubkey_load(ctx, &p, pubkey);
memset(pubkey, 0, sizeof(*pubkey));		memset(pubkey, 0, sizeof(*pubkey));
		ret = ret && secp256k1_ec_pubkey_tweak_add_helper(&ctx->ecmult_ctx, &p, tweak);
if (ret) {		if (ret) {
if (secp256k1_eckey_pubkey_tweak_add(&ctx->ecmult_ctx, &p, &term)) {
secp256k1_pubkey_save(pubkey, &p);		secp256k1_pubkey_save(pubkey, &p);
} else {
ret = 0;
}
}		}

return ret;		return ret;
}		}

int secp256k1_ec_seckey_tweak_mul(const secp256k1_context* ctx, unsigned char seckey, const unsigned char tweak) {		int secp256k1_ec_seckey_tweak_mul(const secp256k1_context* ctx, unsigned char seckey, const unsigned char tweak) {
secp256k1_scalar factor;		secp256k1_scalar factor;
secp256k1_scalar sec;		secp256k1_scalar sec;
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