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Merge BlockstreamResearch/secp256k1-zkp#365: tests: Port hash context tests to zkp modules

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72867fd682 tests: Port hash context tests to zkp modules (mllwchrry)

Pull request description:

  Ports the hash context tests from bitcoin-core/secp256k1#1777 to the zkp-specific modules.


ACKs for top commit:
  apoelstra:
    ACK 72867fd682279ff2c79cf13f4f8d8484048d2527; successfully ran local tests


Tree-SHA512: 1714a4c5fd793b32a0f00a92670a48709e4d01917bb81739428601c6e88e89f871cdc1294024e6df7272d6c16e681309d9b3448adcd07ce37bfa2be2dc3f4172
This commit is contained in:
Andrew Poelstra
2026-08-18 15:20:17 +00:00
parent e166e4024f 72867fd682
commit 10366dbbbf
6 changed files with 177 additions and 1 deletions
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29
src/modules/bppp/tests_impl.h
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@@ -664,6 +664,34 @@ static void norm_arg_test_all(void) {
norm_arg_test(64, 64);
}
DEFINE_SHA256_TRANSFORM_PROBE(sha256_bppp)
static void test_bppp_ctx_sha256(void) {
/* Check ctx-provided SHA256 compression override takes effect */
secp256k1_context *ctx = secp256k1_context_clone(CTX);
unsigned char out_default[66], out_custom[66];
secp256k1_bppp_generators *gens;
size_t len = sizeof(out_default);
/* Default behavior. No ctx-provided SHA256 compression */
gens = secp256k1_bppp_generators_create(ctx, 2);
CHECK(gens != NULL);
CHECK(secp256k1_bppp_generators_serialize(ctx, gens, out_default, &len));
secp256k1_bppp_generators_destroy(ctx, gens);
CHECK(!sha256_bppp_called);
/* Override SHA256 compression directly, bypassing the ctx setter sanity checks */
ctx->hash_ctx.fn_sha256_compression = sha256_bppp;
gens = secp256k1_bppp_generators_create(ctx, 2);
CHECK(gens != NULL);
CHECK(secp256k1_bppp_generators_serialize(ctx, gens, out_custom, &len));
secp256k1_bppp_generators_destroy(ctx, gens);
CHECK(sha256_bppp_called);
/* Outputs must differ if custom compression was used */
CHECK(secp256k1_memcmp_var(out_default, out_custom, 66) != 0);
secp256k1_context_destroy(ctx);
}
/* --- Test registry --- */
static const struct tf_test_entry tests_bppp[] = {
CASE1(test_log_exp),
@@ -676,6 +704,7 @@ static const struct tf_test_entry tests_bppp[] = {
CASE1(norm_arg_test_all),
CASE1(norm_arg_verify_vectors),
CASE1(norm_arg_prove_vectors),
CASE1(test_bppp_ctx_sha256),
};
#endif