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Abstract out verify logic for fe_mul

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This commit is contained in:
Pieter Wuille
2022-01-28 18:40:33 -05:00
parent e179e651cb
commit 4c25f6efbd
4 changed files with 25 additions and 30 deletions
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14
src/field_impl.h
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@@ -286,6 +286,20 @@ SECP256K1_INLINE static void secp256k1_fe_add(secp256k1_fe *r, const secp256k1_f
r->normalized = 0;
secp256k1_fe_verify(r);
}
static void secp256k1_fe_impl_mul(secp256k1_fe *r, const secp256k1_fe *a, const secp256k1_fe * SECP256K1_RESTRICT b);
SECP256K1_INLINE static void secp256k1_fe_mul(secp256k1_fe *r, const secp256k1_fe *a, const secp256k1_fe * SECP256K1_RESTRICT b) {
secp256k1_fe_verify(a);
secp256k1_fe_verify(b);
VERIFY_CHECK(a->magnitude <= 8);
VERIFY_CHECK(b->magnitude <= 8);
VERIFY_CHECK(r != b);
VERIFY_CHECK(a != b);
secp256k1_fe_impl_mul(r, a, b);
r->magnitude = 1;
r->normalized = 0;
secp256k1_fe_verify(r);
}
#endif /* defined(VERIFY) */
#endif /* SECP256K1_FIELD_IMPL_H */