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Add scalar splitting functions

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Which currently delegate to the lambda-splitter in group.
This commit is contained in:
Pieter Wuille
2014-11-26 16:22:02 +01:00
parent d1502eb459
commit 6794be6080
4 changed files with 60 additions and 0 deletions
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7
src/scalar.h
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@@ -72,4 +72,11 @@ static int secp256k1_scalar_is_high(const secp256k1_scalar_t *a);
/** Convert a scalar to a number. */
static void secp256k1_scalar_get_num(secp256k1_num_t *r, const secp256k1_scalar_t *a);
static void secp256k1_scalar_split_128(secp256k1_scalar_t *r1, secp256k1_scalar_t *r2, const secp256k1_scalar_t *a);
#ifdef USE_ENDOMORPHISM
/** Find r1 and r2 such that r1+r2*lambda = a, and r1 and r2 are maximum 128 bits long (see secp256k1_gej_mul_lambda). */
static void secp256k1_scalar_split_lambda_var(secp256k1_scalar_t *r1, secp256k1_scalar_t *r2, const secp256k1_scalar_t *a);
#endif
#endif