Differential D7642 Diff 23972 src/secp256k1/src/secp256k1.c

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src/secp256k1/src/secp256k1.c

Show First 20 Lines • Show All 544 Lines • ▼ Show 20 Lines	int secp256k1_ec_seckey_verify(const secp256k1_context* ctx, const unsigned char *seckey) {
VERIFY_CHECK(ctx != NULL);		VERIFY_CHECK(ctx != NULL);
ARG_CHECK(seckey != NULL);		ARG_CHECK(seckey != NULL);

ret = secp256k1_scalar_set_b32_seckey(&sec, seckey);		ret = secp256k1_scalar_set_b32_seckey(&sec, seckey);
secp256k1_scalar_clear(&sec);		secp256k1_scalar_clear(&sec);
return ret;		return ret;
}		}

int secp256k1_ec_pubkey_create(const secp256k1_context* ctx, secp256k1_pubkey pubkey, const unsigned char seckey) {		static int secp256k1_ec_pubkey_create_helper(const secp256k1_ecmult_gen_context ecmult_gen_ctx, secp256k1_scalar seckey_scalar, secp256k1_ge p, const unsigned char seckey) {
secp256k1_gej pj;		secp256k1_gej pj;
		int ret;

		ret = secp256k1_scalar_set_b32_seckey(seckey_scalar, seckey);
		secp256k1_scalar_cmov(seckey_scalar, &secp256k1_scalar_one, !ret);

		secp256k1_ecmult_gen(ecmult_gen_ctx, &pj, seckey_scalar);
		secp256k1_ge_set_gej(p, &pj);
		return ret;
		}

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

ret = secp256k1_scalar_set_b32_seckey(&sec, seckey);		ret = secp256k1_ec_pubkey_create_helper(&ctx->ecmult_gen_ctx, &seckey_scalar, &p, seckey);
secp256k1_scalar_cmov(&sec, &secp256k1_scalar_one, !ret);

secp256k1_ecmult_gen(&ctx->ecmult_gen_ctx, &pj, &sec);
secp256k1_ge_set_gej(&p, &pj);
secp256k1_pubkey_save(pubkey, &p);		secp256k1_pubkey_save(pubkey, &p);
memczero(pubkey, sizeof(*pubkey), !ret);		memczero(pubkey, sizeof(*pubkey), !ret);

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

int secp256k1_ec_seckey_negate(const secp256k1_context* ctx, unsigned char *seckey) {		int secp256k1_ec_seckey_negate(const secp256k1_context* ctx, unsigned char *seckey) {
secp256k1_scalar sec;		secp256k1_scalar sec;
int ret = 0;		int ret = 0;
VERIFY_CHECK(ctx != NULL);		VERIFY_CHECK(ctx != NULL);
ARG_CHECK(seckey != NULL);		ARG_CHECK(seckey != NULL);
Show All 21 Lines	int secp256k1_ec_pubkey_negate(const secp256k1_context* ctx, secp256k1_pubkey *pubkey) {
memset(pubkey, 0, sizeof(*pubkey));		memset(pubkey, 0, sizeof(*pubkey));
if (ret) {		if (ret) {
secp256k1_ge_neg(&p, &p);		secp256k1_ge_neg(&p, &p);
secp256k1_pubkey_save(pubkey, &p);		secp256k1_pubkey_save(pubkey, &p);
}		}
return ret;		return ret;
}		}

int secp256k1_ec_seckey_tweak_add(const secp256k1_context* ctx, unsigned char seckey, const unsigned char tweak) {
		static int secp256k1_ec_seckey_tweak_add_helper(secp256k1_scalar sec, const unsigned char tweak) {
secp256k1_scalar term;		secp256k1_scalar term;
		int overflow = 0;
		int ret = 0;

		secp256k1_scalar_set_b32(&term, tweak, &overflow);
		ret = (!overflow) & secp256k1_eckey_privkey_tweak_add(sec, &term);
		secp256k1_scalar_clear(&term);
		return ret;
		}

		int secp256k1_ec_seckey_tweak_add(const secp256k1_context* ctx, unsigned char seckey, const unsigned char tweak) {
secp256k1_scalar sec;		secp256k1_scalar sec;
int ret = 0;		int ret = 0;
int overflow = 0;
VERIFY_CHECK(ctx != NULL);		VERIFY_CHECK(ctx != NULL);
ARG_CHECK(seckey != NULL);		ARG_CHECK(seckey != NULL);
ARG_CHECK(tweak != NULL);		ARG_CHECK(tweak != NULL);

secp256k1_scalar_set_b32(&term, tweak, &overflow);
ret = secp256k1_scalar_set_b32_seckey(&sec, seckey);		ret = secp256k1_scalar_set_b32_seckey(&sec, seckey);
		ret &= secp256k1_ec_seckey_tweak_add_helper(&sec, tweak);
ret &= (!overflow) & secp256k1_eckey_privkey_tweak_add(&sec, &term);
secp256k1_scalar_cmov(&sec, &secp256k1_scalar_zero, !ret);		secp256k1_scalar_cmov(&sec, &secp256k1_scalar_zero, !ret);
secp256k1_scalar_get_b32(seckey, &sec);		secp256k1_scalar_get_b32(seckey, &sec);

secp256k1_scalar_clear(&sec);		secp256k1_scalar_clear(&sec);
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) {		static int secp256k1_ec_pubkey_tweak_add_helper(const secp256k1_ecmult_context* ecmult_ctx, secp256k1_ge p, const unsigned char tweak) {
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