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Add ctime tests for ellswift module

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This commit is contained in:
Pieter Wuille
2022-11-04 15:52:12 -04:00
parent df633cdeba
commit 2d1d41acf8
2 changed files with 37 additions and 0 deletions
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2
src/modules/ellswift/main_impl.h
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@@ -463,6 +463,7 @@ int secp256k1_ellswift_create(const secp256k1_context *ctx, unsigned char *ell64
/* Compute (affine) public key */
ret = secp256k1_ec_pubkey_create_helper(&ctx->ecmult_gen_ctx, &seckey_scalar, &p, seckey32);
secp256k1_declassify(ctx, &p, sizeof(p)); /* not constant time in produced pubkey */
secp256k1_fe_normalize_var(&p.x);
secp256k1_fe_normalize_var(&p.y);
@@ -471,6 +472,7 @@ int secp256k1_ellswift_create(const secp256k1_context *ctx, unsigned char *ell64
secp256k1_ellswift_sha256_init_create(&hash);
secp256k1_sha256_write(&hash, seckey32, 32);
secp256k1_sha256_write(&hash, zero32, sizeof(zero32));
secp256k1_declassify(ctx, &hash, sizeof(hash)); /* private key is hashed now */
if (auxrnd32) secp256k1_sha256_write(&hash, auxrnd32, 32);
/* Compute ElligatorSwift encoding and construct output. */