frost/secp256k1-zkp
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musig: Re-add adaptor signatures support

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mllwchrry committed 2026-02-13 15:07:52 +02:00
1 parent 248358f2bc
commit 8d443b8030
9 files changed
+401 -21
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src/ctime_tests.c
+23 -1
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@@ -207,7 +207,12 @@ static void run_tests(secp256k1_context *ctx, unsigned char *key) {
secp256k1_musig_keyagg_cache cache;
secp256k1_musig_session session;
secp256k1_musig_partial_sig partial_sig;
const secp256k1_musig_partial_sig *partial_sig_ptr[1];
unsigned char extra_input[32];
unsigned char sec_adaptor[32];
secp256k1_pubkey adaptor;
unsigned char pre_sig[64];
int nonce_parity;
pk_ptr[0] = &pk;
pubnonce_ptr[0] = &pubnonce;
@@ -216,14 +221,19 @@ static void run_tests(secp256k1_context *ctx, unsigned char *key) {
session_secrand[0] = session_secrand[0] + 1;
memcpy(extra_input, key, sizeof(extra_input));
extra_input[0] = extra_input[0] + 2;
memcpy(sec_adaptor, key, sizeof(sec_adaptor));
sec_adaptor[0] = extra_input[0] + 3;
partial_sig_ptr[0] = &partial_sig;
CHECK(secp256k1_keypair_create(ctx, &keypair, key));
CHECK(secp256k1_keypair_pub(ctx, &pk, &keypair));
CHECK(secp256k1_musig_pubkey_agg(ctx, &agg_pk, &cache, pk_ptr, 1));
CHECK(secp256k1_ec_pubkey_create(ctx, &adaptor, sec_adaptor));
SECP256K1_CHECKMEM_UNDEFINE(key, 32);
SECP256K1_CHECKMEM_UNDEFINE(session_secrand, sizeof(session_secrand));
SECP256K1_CHECKMEM_UNDEFINE(extra_input, sizeof(extra_input));
SECP256K1_CHECKMEM_UNDEFINE(sec_adaptor, sizeof(sec_adaptor));
ret = secp256k1_musig_nonce_gen(ctx, &secnonce, &pubnonce, session_secrand, key, &pk, msg, &cache, extra_input);
SECP256K1_CHECKMEM_DEFINE(&ret, sizeof(ret));
CHECK(ret == 1);
@@ -234,7 +244,7 @@ static void run_tests(secp256k1_context *ctx, unsigned char *key) {
CHECK(secp256k1_musig_nonce_agg(ctx, &aggnonce, pubnonce_ptr, 1));
/* Make sure that previous tests don't undefine msg. It's not used as a secret here. */
SECP256K1_CHECKMEM_DEFINE(msg, sizeof(msg));
CHECK(secp256k1_musig_nonce_process(ctx, &session, &aggnonce, msg, &cache) == 1);
CHECK(secp256k1_musig_nonce_process(ctx, &session, &aggnonce, msg, &cache, &adaptor) == 1);
ret = secp256k1_keypair_create(ctx, &keypair, key);
SECP256K1_CHECKMEM_DEFINE(&ret, sizeof(ret));
@@ -242,6 +252,18 @@ static void run_tests(secp256k1_context *ctx, unsigned char *key) {
ret = secp256k1_musig_partial_sign(ctx, &partial_sig, &secnonce, &keypair, &cache, &session);
SECP256K1_CHECKMEM_DEFINE(&ret, sizeof(ret));
CHECK(ret == 1);
SECP256K1_CHECKMEM_DEFINE(&partial_sig, sizeof(partial_sig));
CHECK(secp256k1_musig_partial_sig_agg(ctx, pre_sig, &session, partial_sig_ptr, 1));
SECP256K1_CHECKMEM_DEFINE(pre_sig, sizeof(pre_sig));
CHECK(secp256k1_musig_nonce_parity(ctx, &nonce_parity, &session));
ret = secp256k1_musig_adapt(ctx, sig, pre_sig, sec_adaptor, nonce_parity);
SECP256K1_CHECKMEM_DEFINE(&ret, sizeof(ret));
CHECK(ret == 1);
ret = secp256k1_musig_extract_adaptor(ctx, sec_adaptor, sig, pre_sig, nonce_parity);
SECP256K1_CHECKMEM_DEFINE(&ret, sizeof(ret));
CHECK(ret == 1);
}
#endif