frost/secp256k1-zkp
3
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

tests: refactor tagged hash tests

Browse Source 
Move the sha256_tag_test_internal function out of the musig module
into tests.c. This makes it available to other modules wishing to verify tagged
hashes without needing to duplicate the function.

Change the function signature to expect a const unsigned char and update
the tagged hash tests to use static const unsigned char character
arrays (where necessary).

Add a comment for each tag. This is done as a convenience for checking
the strings against the protocol specifications, where the tags are
normally specified as strings.

Update tests in the ellswift and schnorrsig modules to use the
sha256_tag_test_internal helper function.
This commit is contained in:
josibake
2025-08-15 09:37:29 +01:00
parent d599714147
commit 5153cf1c91
4 changed files with 36 additions and 30 deletions
Download Patch File Download Diff File Expand all files Collapse all files

14
src/modules/schnorrsig/tests_impl.h
View File

@@ -21,11 +21,12 @@ static void nonce_function_bip340_bitflip(unsigned char **args, size_t n_flip, s
}
static void run_nonce_function_bip340_tests(void) {
unsigned char tag[] = {'B', 'I', 'P', '0', '3', '4', '0', '/', 'n', 'o', 'n', 'c', 'e'};
unsigned char aux_tag[] = {'B', 'I', 'P', '0', '3', '4', '0', '/', 'a', 'u', 'x'};
/* "BIP0340/nonce" */
static const unsigned char tag[] = {'B', 'I', 'P', '0', '3', '4', '0', '/', 'n', 'o', 'n', 'c', 'e'};
/* "BIP0340/aux" */
static const unsigned char aux_tag[] = {'B', 'I', 'P', '0', '3', '4', '0', '/', 'a', 'u', 'x'};
unsigned char algo[] = {'B', 'I', 'P', '0', '3', '4', '0', '/', 'n', 'o', 'n', 'c', 'e'};
size_t algolen = sizeof(algo);
secp256k1_sha256 sha;
secp256k1_sha256 sha_optimized;
unsigned char nonce[32], nonce_z[32];
unsigned char msg[32];
@@ -39,16 +40,15 @@ static void run_nonce_function_bip340_tests(void) {
/* Check that hash initialized by
* secp256k1_nonce_function_bip340_sha256_tagged has the expected
* state. */
secp256k1_sha256_initialize_tagged(&sha, tag, sizeof(tag));
secp256k1_nonce_function_bip340_sha256_tagged(&sha_optimized);
test_sha256_eq(&sha, &sha_optimized);
test_sha256_tag_midstate(&sha_optimized, tag, sizeof(tag));
/* Check that hash initialized by
* secp256k1_nonce_function_bip340_sha256_tagged_aux has the expected
* state. */
secp256k1_sha256_initialize_tagged(&sha, aux_tag, sizeof(aux_tag));
secp256k1_nonce_function_bip340_sha256_tagged_aux(&sha_optimized);
test_sha256_eq(&sha, &sha_optimized);
test_sha256_tag_midstate(&sha_optimized, aux_tag, sizeof(aux_tag));
testrand256(msg);
testrand256(key);