diff options
Diffstat (limited to 'src/scalar.h')
| -rw-r--r-- | src/scalar.h | 11 |
1 files changed, 5 insertions, 6 deletions
diff --git a/src/scalar.h b/src/scalar.h index 95d3e326c9..fb3fb187ce 100644 --- a/src/scalar.h +++ b/src/scalar.h @@ -102,12 +102,11 @@ static void secp256k1_scalar_order_get_num(secp256k1_num *r); /** Compare two scalars. */ static int secp256k1_scalar_eq(const secp256k1_scalar *a, const secp256k1_scalar *b); -#ifdef USE_ENDOMORPHISM -/** Find r1 and r2 such that r1+r2*2^128 = a. */ -static void secp256k1_scalar_split_128(secp256k1_scalar *r1, secp256k1_scalar *r2, const secp256k1_scalar *a); -/** 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(secp256k1_scalar *r1, secp256k1_scalar *r2, const secp256k1_scalar *a); -#endif +/** Find r1 and r2 such that r1+r2*2^128 = k. */ +static void secp256k1_scalar_split_128(secp256k1_scalar *r1, secp256k1_scalar *r2, const secp256k1_scalar *k); +/** Find r1 and r2 such that r1+r2*lambda = k, + * where r1 and r2 or their negations are maximum 128 bits long (see secp256k1_ge_mul_lambda). */ +static void secp256k1_scalar_split_lambda(secp256k1_scalar *r1, secp256k1_scalar *r2, const secp256k1_scalar *k); /** Multiply a and b (without taking the modulus!), divide by 2**shift, and round to the nearest integer. Shift must be at least 256. */ static void secp256k1_scalar_mul_shift_var(secp256k1_scalar *r, const secp256k1_scalar *a, const secp256k1_scalar *b, unsigned int shift); |