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ctime_tests.c
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ctime_tests.c
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/***********************************************************************
* Copyright (c) 2020 Gregory Maxwell *
* Distributed under the MIT software license, see the accompanying *
* file COPYING or https://www.opensource.org/licenses/mit-license.php.*
***********************************************************************/
#include <stdio.h>
#include <string.h>
#include "../include/secp256k1.h"
#include "assumptions.h"
#include "checkmem.h"
#if !SECP256K1_CHECKMEM_ENABLED
# error "This tool cannot be compiled without memory-checking interface (valgrind or msan)"
#endif
#ifdef ENABLE_MODULE_ECDH
# include "../include/secp256k1_ecdh.h"
#endif
#ifdef ENABLE_MODULE_RECOVERY
# include "../include/secp256k1_recovery.h"
#endif
#ifdef ENABLE_MODULE_EXTRAKEYS
# include "../include/secp256k1_extrakeys.h"
#endif
#ifdef ENABLE_MODULE_SCHNORRSIG
#include "../include/secp256k1_schnorrsig.h"
#endif
#ifdef ENABLE_MODULE_ELLSWIFT
#include "../include/secp256k1_ellswift.h"
#endif
#ifdef ENABLE_MODULE_ECDSA_S2C
#include "../include/secp256k1_ecdsa_s2c.h"
#endif
#ifdef ENABLE_MODULE_ECDSA_ADAPTOR
#include "../include/secp256k1_ecdsa_adaptor.h"
#endif
#ifdef ENABLE_MODULE_MUSIG
#include "../include/secp256k1_musig.h"
#endif
static void run_tests(secp256k1_context *ctx, unsigned char *key);
int main(void) {
secp256k1_context* ctx;
unsigned char key[32];
int ret, i;
if (!SECP256K1_CHECKMEM_RUNNING()) {
fprintf(stderr, "This test can only usefully be run inside valgrind because it was not compiled under msan.\n");
fprintf(stderr, "Usage: libtool --mode=execute valgrind ./ctime_tests\n");
return 1;
}
ctx = secp256k1_context_create(SECP256K1_CONTEXT_DECLASSIFY);
/** In theory, testing with a single secret input should be sufficient:
* If control flow depended on secrets the tool would generate an error.
*/
for (i = 0; i < 32; i++) {
key[i] = i + 65;
}
run_tests(ctx, key);
/* Test context randomisation. Do this last because it leaves the context
* tainted. */
SECP256K1_CHECKMEM_UNDEFINE(key, 32);
ret = secp256k1_context_randomize(ctx, key);
SECP256K1_CHECKMEM_DEFINE(&ret, sizeof(ret));
CHECK(ret);
secp256k1_context_destroy(ctx);
return 0;
}
static void run_tests(secp256k1_context *ctx, unsigned char *key) {
secp256k1_ecdsa_signature signature;
secp256k1_pubkey pubkey;
size_t siglen = 74;
size_t outputlen = 33;
int i;
int ret;
unsigned char msg[32];
unsigned char sig[74];
unsigned char spubkey[33];
#ifdef ENABLE_MODULE_RECOVERY
secp256k1_ecdsa_recoverable_signature recoverable_signature;
int recid;
#endif
#ifdef ENABLE_MODULE_EXTRAKEYS
secp256k1_keypair keypair;
#endif
#ifdef ENABLE_MODULE_ELLSWIFT
unsigned char ellswift[64];
static const unsigned char prefix[64] = {'t', 'e', 's', 't'};
#endif
for (i = 0; i < 32; i++) {
msg[i] = i + 1;
}
/* Test keygen. */
SECP256K1_CHECKMEM_UNDEFINE(key, 32);
ret = secp256k1_ec_pubkey_create(ctx, &pubkey, key);
SECP256K1_CHECKMEM_DEFINE(&pubkey, sizeof(secp256k1_pubkey));
SECP256K1_CHECKMEM_DEFINE(&ret, sizeof(ret));
CHECK(ret);
CHECK(secp256k1_ec_pubkey_serialize(ctx, spubkey, &outputlen, &pubkey, SECP256K1_EC_COMPRESSED) == 1);
/* Test signing. */
SECP256K1_CHECKMEM_UNDEFINE(key, 32);
ret = secp256k1_ecdsa_sign(ctx, &signature, msg, key, NULL, NULL);
SECP256K1_CHECKMEM_DEFINE(&signature, sizeof(secp256k1_ecdsa_signature));
SECP256K1_CHECKMEM_DEFINE(&ret, sizeof(ret));
CHECK(ret);
CHECK(secp256k1_ecdsa_signature_serialize_der(ctx, sig, &siglen, &signature));
#ifdef ENABLE_MODULE_ECDH
/* Test ECDH. */
SECP256K1_CHECKMEM_UNDEFINE(key, 32);
ret = secp256k1_ecdh(ctx, msg, &pubkey, key, NULL, NULL);
SECP256K1_CHECKMEM_DEFINE(&ret, sizeof(ret));
CHECK(ret == 1);
#endif
#ifdef ENABLE_MODULE_RECOVERY
/* Test signing a recoverable signature. */
SECP256K1_CHECKMEM_UNDEFINE(key, 32);
ret = secp256k1_ecdsa_sign_recoverable(ctx, &recoverable_signature, msg, key, NULL, NULL);
SECP256K1_CHECKMEM_DEFINE(&recoverable_signature, sizeof(recoverable_signature));
SECP256K1_CHECKMEM_DEFINE(&ret, sizeof(ret));
CHECK(ret);
CHECK(secp256k1_ecdsa_recoverable_signature_serialize_compact(ctx, sig, &recid, &recoverable_signature));
CHECK(recid >= 0 && recid <= 3);
#endif
SECP256K1_CHECKMEM_UNDEFINE(key, 32);
ret = secp256k1_ec_seckey_verify(ctx, key);
SECP256K1_CHECKMEM_DEFINE(&ret, sizeof(ret));
CHECK(ret == 1);
SECP256K1_CHECKMEM_UNDEFINE(key, 32);
ret = secp256k1_ec_seckey_negate(ctx, key);
SECP256K1_CHECKMEM_DEFINE(&ret, sizeof(ret));
CHECK(ret == 1);
SECP256K1_CHECKMEM_UNDEFINE(key, 32);
SECP256K1_CHECKMEM_UNDEFINE(msg, 32);
ret = secp256k1_ec_seckey_tweak_add(ctx, key, msg);
SECP256K1_CHECKMEM_DEFINE(&ret, sizeof(ret));
CHECK(ret == 1);
SECP256K1_CHECKMEM_UNDEFINE(key, 32);
SECP256K1_CHECKMEM_UNDEFINE(msg, 32);
ret = secp256k1_ec_seckey_tweak_mul(ctx, key, msg);
SECP256K1_CHECKMEM_DEFINE(&ret, sizeof(ret));
CHECK(ret == 1);
/* Test keypair_create and keypair_xonly_tweak_add. */
#ifdef ENABLE_MODULE_EXTRAKEYS
SECP256K1_CHECKMEM_UNDEFINE(key, 32);
ret = secp256k1_keypair_create(ctx, &keypair, key);
SECP256K1_CHECKMEM_DEFINE(&ret, sizeof(ret));
CHECK(ret == 1);
/* The tweak is not treated as a secret in keypair_tweak_add */
SECP256K1_CHECKMEM_DEFINE(msg, 32);
ret = secp256k1_keypair_xonly_tweak_add(ctx, &keypair, msg);
SECP256K1_CHECKMEM_DEFINE(&ret, sizeof(ret));
CHECK(ret == 1);
SECP256K1_CHECKMEM_UNDEFINE(key, 32);
SECP256K1_CHECKMEM_UNDEFINE(&keypair, sizeof(keypair));
ret = secp256k1_keypair_sec(ctx, key, &keypair);
SECP256K1_CHECKMEM_DEFINE(&ret, sizeof(ret));
CHECK(ret == 1);
#endif
#ifdef ENABLE_MODULE_SCHNORRSIG
SECP256K1_CHECKMEM_UNDEFINE(key, 32);
ret = secp256k1_keypair_create(ctx, &keypair, key);
SECP256K1_CHECKMEM_DEFINE(&ret, sizeof(ret));
CHECK(ret == 1);
ret = secp256k1_schnorrsig_sign32(ctx, sig, msg, &keypair, NULL);
SECP256K1_CHECKMEM_DEFINE(&ret, sizeof(ret));
CHECK(ret == 1);
#endif
#ifdef ENABLE_MODULE_ELLSWIFT
SECP256K1_CHECKMEM_UNDEFINE(key, 32);
ret = secp256k1_ellswift_create(ctx, ellswift, key, NULL);
SECP256K1_CHECKMEM_DEFINE(&ret, sizeof(ret));
CHECK(ret == 1);
SECP256K1_CHECKMEM_UNDEFINE(key, 32);
ret = secp256k1_ellswift_create(ctx, ellswift, key, ellswift);
SECP256K1_CHECKMEM_DEFINE(&ret, sizeof(ret));
CHECK(ret == 1);
for (i = 0; i < 2; i++) {
SECP256K1_CHECKMEM_UNDEFINE(key, 32);
SECP256K1_CHECKMEM_DEFINE(&ellswift, sizeof(ellswift));
ret = secp256k1_ellswift_xdh(ctx, msg, ellswift, ellswift, key, i, secp256k1_ellswift_xdh_hash_function_bip324, NULL);
SECP256K1_CHECKMEM_DEFINE(&ret, sizeof(ret));
CHECK(ret == 1);
SECP256K1_CHECKMEM_UNDEFINE(key, 32);
SECP256K1_CHECKMEM_DEFINE(&ellswift, sizeof(ellswift));
ret = secp256k1_ellswift_xdh(ctx, msg, ellswift, ellswift, key, i, secp256k1_ellswift_xdh_hash_function_prefix, (void *)prefix);
SECP256K1_CHECKMEM_DEFINE(&ret, sizeof(ret));
CHECK(ret == 1);
}
#endif
#ifdef ENABLE_MODULE_ECDSA_S2C
{
unsigned char s2c_data[32] = {0};
unsigned char s2c_data_comm[32] = {0};
secp256k1_ecdsa_s2c_opening s2c_opening;
SECP256K1_CHECKMEM_UNDEFINE(key, 32);
SECP256K1_CHECKMEM_UNDEFINE(s2c_data, 32);
ret = secp256k1_ecdsa_s2c_sign(ctx, &signature, &s2c_opening, msg, key, s2c_data);
SECP256K1_CHECKMEM_DEFINE(&ret, sizeof(ret));
CHECK(ret == 1);
SECP256K1_CHECKMEM_UNDEFINE(s2c_data, 32);
ret = secp256k1_ecdsa_anti_exfil_host_commit(ctx, s2c_data_comm, s2c_data);
SECP256K1_CHECKMEM_DEFINE(&ret, sizeof(ret));
CHECK(ret == 1);
SECP256K1_CHECKMEM_UNDEFINE(key, 32);
SECP256K1_CHECKMEM_UNDEFINE(s2c_data, 32);
ret = secp256k1_ecdsa_anti_exfil_signer_commit(ctx, &s2c_opening, msg, key, s2c_data);
SECP256K1_CHECKMEM_DEFINE(&ret, sizeof(ret));
CHECK(ret == 1);
}
#endif
#ifdef ENABLE_MODULE_ECDSA_ADAPTOR
{
unsigned char adaptor_sig[162];
unsigned char deckey[32];
unsigned char expected_deckey[32];
secp256k1_pubkey enckey;
for (i = 0; i < 32; i++) {
deckey[i] = i + 2;
}
ret = secp256k1_ec_pubkey_create(ctx, &enckey, deckey);
CHECK(ret == 1);
SECP256K1_CHECKMEM_UNDEFINE(key, 32);
ret = secp256k1_ecdsa_adaptor_encrypt(ctx, adaptor_sig, key, &enckey, msg, NULL, NULL);
SECP256K1_CHECKMEM_DEFINE(adaptor_sig, sizeof(adaptor_sig));
SECP256K1_CHECKMEM_DEFINE(&ret, sizeof(ret));
CHECK(ret == 1);
SECP256K1_CHECKMEM_UNDEFINE(deckey, 32);
ret = secp256k1_ecdsa_adaptor_decrypt(ctx, &signature, deckey, adaptor_sig);
SECP256K1_CHECKMEM_DEFINE(&ret, sizeof(ret));
CHECK(ret == 1);
SECP256K1_CHECKMEM_UNDEFINE(&signature, 32);
ret = secp256k1_ecdsa_adaptor_recover(ctx, expected_deckey, &signature, adaptor_sig, &enckey);
SECP256K1_CHECKMEM_DEFINE(expected_deckey, sizeof(expected_deckey));
SECP256K1_CHECKMEM_DEFINE(&ret, sizeof(ret));
CHECK(ret == 1);
SECP256K1_CHECKMEM_DEFINE(deckey, sizeof(deckey));
ret = secp256k1_memcmp_var(deckey, expected_deckey, sizeof(expected_deckey));
SECP256K1_CHECKMEM_DEFINE(&ret, sizeof(ret));
CHECK(ret == 0);
}
#endif
#ifdef ENABLE_MODULE_MUSIG
{
secp256k1_pubkey pk;
const secp256k1_pubkey *pk_ptr[1];
secp256k1_xonly_pubkey agg_pk;
unsigned char session_id[32];
secp256k1_musig_secnonce secnonce;
secp256k1_musig_pubnonce pubnonce;
const secp256k1_musig_pubnonce *pubnonce_ptr[1];
secp256k1_musig_aggnonce aggnonce;
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;
SECP256K1_CHECKMEM_DEFINE(key, 32);
memcpy(session_id, key, sizeof(session_id));
session_id[0] = session_id[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, NULL, &agg_pk, &cache, pk_ptr, 1));
CHECK(secp256k1_ec_pubkey_create(ctx, &adaptor, sec_adaptor));
SECP256K1_CHECKMEM_UNDEFINE(key, 32);
SECP256K1_CHECKMEM_UNDEFINE(session_id, sizeof(session_id));
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_id, key, &pk, msg, &cache, extra_input);
SECP256K1_CHECKMEM_DEFINE(&ret, sizeof(ret));
CHECK(ret == 1);
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, &adaptor) == 1);
ret = secp256k1_keypair_create(ctx, &keypair, key);
SECP256K1_CHECKMEM_DEFINE(&ret, sizeof(ret));
CHECK(ret == 1);
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
}