frost/secp256k1-zkp
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Convert lambda splitter to pure scalar code.

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This enables the use of the endomorphism optimization without bignum.
This commit is contained in:
Pieter Wuille
2014-12-01 18:22:04 +01:00
parent cc604e9842
commit c35ff1ea44
4 changed files with 65 additions and 71 deletions
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8
src/ecmult_impl.h
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@@ -168,10 +168,10 @@ static void secp256k1_ecmult(secp256k1_gej_t *r, const secp256k1_gej_t *a, const
secp256k1_scalar_split_lambda_var(&na_1, &na_lam, na);
/* build wnaf representation for na_1 and na_lam. */
int wnaf_na_1[129]; int bits_na_1 = secp256k1_ecmult_wnaf(wnaf_na_1, &na_1, WINDOW_A);
int wnaf_na_lam[129]; int bits_na_lam = secp256k1_ecmult_wnaf(wnaf_na_lam, &na_lam, WINDOW_A);
VERIFY_CHECK(bits_na_1 <= 129);
VERIFY_CHECK(bits_na_lam <= 129);
int wnaf_na_1[130]; int bits_na_1 = secp256k1_ecmult_wnaf(wnaf_na_1, &na_1, WINDOW_A);
int wnaf_na_lam[130]; int bits_na_lam = secp256k1_ecmult_wnaf(wnaf_na_lam, &na_lam, WINDOW_A);
VERIFY_CHECK(bits_na_1 <= 130);
VERIFY_CHECK(bits_na_lam <= 130);
int bits = bits_na_1;
if (bits_na_lam > bits) bits = bits_na_lam;
#else