1 /***********************************************************************
2 * Copyright (c) 2020 Gregory Maxwell *
3 * Distributed under the MIT software license, see the accompanying *
4 * file COPYING or https://www.opensource.org/licenses/mit-license.php.*
5 ***********************************************************************/
7 #include <valgrind/memcheck.h>
8 #include "include/secp256k1.h"
9 #include "assumptions.h"
12 #ifdef ENABLE_MODULE_ECDH
13 # include "include/secp256k1_ecdh.h"
16 #ifdef ENABLE_MODULE_RECOVERY
17 # include "include/secp256k1_recovery.h"
20 #ifdef ENABLE_MODULE_EXTRAKEYS
21 # include "include/secp256k1_extrakeys.h"
24 #ifdef ENABLE_MODULE_SCHNORRSIG
25 #include "include/secp256k1_schnorrsig.h"
29 secp256k1_context* ctx;
30 secp256k1_ecdsa_signature signature;
31 secp256k1_pubkey pubkey;
33 size_t outputlen = 33;
36 unsigned char msg[32];
37 unsigned char key[32];
38 unsigned char sig[74];
39 unsigned char spubkey[33];
40 #ifdef ENABLE_MODULE_RECOVERY
41 secp256k1_ecdsa_recoverable_signature recoverable_signature;
44 #ifdef ENABLE_MODULE_EXTRAKEYS
45 secp256k1_keypair keypair;
48 if (!RUNNING_ON_VALGRIND) {
49 fprintf(stderr, "This test can only usefully be run inside valgrind.\n");
50 fprintf(stderr, "Usage: libtool --mode=execute valgrind ./valgrind_ctime_test\n");
54 /** In theory, testing with a single secret input should be sufficient:
55 * If control flow depended on secrets the tool would generate an error.
57 for (i = 0; i < 32; i++) {
60 for (i = 0; i < 32; i++) {
64 ctx = secp256k1_context_create(SECP256K1_CONTEXT_SIGN
65 | SECP256K1_CONTEXT_VERIFY
66 | SECP256K1_CONTEXT_DECLASSIFY);
69 VALGRIND_MAKE_MEM_UNDEFINED(key, 32);
70 ret = secp256k1_ec_pubkey_create(ctx, &pubkey, key);
71 VALGRIND_MAKE_MEM_DEFINED(&pubkey, sizeof(secp256k1_pubkey));
72 VALGRIND_MAKE_MEM_DEFINED(&ret, sizeof(ret));
74 CHECK(secp256k1_ec_pubkey_serialize(ctx, spubkey, &outputlen, &pubkey, SECP256K1_EC_COMPRESSED) == 1);
77 VALGRIND_MAKE_MEM_UNDEFINED(key, 32);
78 ret = secp256k1_ecdsa_sign(ctx, &signature, msg, key, NULL, NULL);
79 VALGRIND_MAKE_MEM_DEFINED(&signature, sizeof(secp256k1_ecdsa_signature));
80 VALGRIND_MAKE_MEM_DEFINED(&ret, sizeof(ret));
82 CHECK(secp256k1_ecdsa_signature_serialize_der(ctx, sig, &siglen, &signature));
84 #ifdef ENABLE_MODULE_ECDH
86 VALGRIND_MAKE_MEM_UNDEFINED(key, 32);
87 ret = secp256k1_ecdh(ctx, msg, &pubkey, key, NULL, NULL);
88 VALGRIND_MAKE_MEM_DEFINED(&ret, sizeof(ret));
92 #ifdef ENABLE_MODULE_RECOVERY
93 /* Test signing a recoverable signature. */
94 VALGRIND_MAKE_MEM_UNDEFINED(key, 32);
95 ret = secp256k1_ecdsa_sign_recoverable(ctx, &recoverable_signature, msg, key, NULL, NULL);
96 VALGRIND_MAKE_MEM_DEFINED(&recoverable_signature, sizeof(recoverable_signature));
97 VALGRIND_MAKE_MEM_DEFINED(&ret, sizeof(ret));
99 CHECK(secp256k1_ecdsa_recoverable_signature_serialize_compact(ctx, sig, &recid, &recoverable_signature));
100 CHECK(recid >= 0 && recid <= 3);
103 VALGRIND_MAKE_MEM_UNDEFINED(key, 32);
104 ret = secp256k1_ec_seckey_verify(ctx, key);
105 VALGRIND_MAKE_MEM_DEFINED(&ret, sizeof(ret));
108 VALGRIND_MAKE_MEM_UNDEFINED(key, 32);
109 ret = secp256k1_ec_seckey_negate(ctx, key);
110 VALGRIND_MAKE_MEM_DEFINED(&ret, sizeof(ret));
113 VALGRIND_MAKE_MEM_UNDEFINED(key, 32);
114 VALGRIND_MAKE_MEM_UNDEFINED(msg, 32);
115 ret = secp256k1_ec_seckey_tweak_add(ctx, key, msg);
116 VALGRIND_MAKE_MEM_DEFINED(&ret, sizeof(ret));
119 VALGRIND_MAKE_MEM_UNDEFINED(key, 32);
120 VALGRIND_MAKE_MEM_UNDEFINED(msg, 32);
121 ret = secp256k1_ec_seckey_tweak_mul(ctx, key, msg);
122 VALGRIND_MAKE_MEM_DEFINED(&ret, sizeof(ret));
125 /* Test context randomisation. Do this last because it leaves the context tainted. */
126 VALGRIND_MAKE_MEM_UNDEFINED(key, 32);
127 ret = secp256k1_context_randomize(ctx, key);
128 VALGRIND_MAKE_MEM_DEFINED(&ret, sizeof(ret));
131 /* Test keypair_create and keypair_xonly_tweak_add. */
132 #ifdef ENABLE_MODULE_EXTRAKEYS
133 VALGRIND_MAKE_MEM_UNDEFINED(key, 32);
134 ret = secp256k1_keypair_create(ctx, &keypair, key);
135 VALGRIND_MAKE_MEM_DEFINED(&ret, sizeof(ret));
138 /* The tweak is not treated as a secret in keypair_tweak_add */
139 VALGRIND_MAKE_MEM_DEFINED(msg, 32);
140 ret = secp256k1_keypair_xonly_tweak_add(ctx, &keypair, msg);
141 VALGRIND_MAKE_MEM_DEFINED(&ret, sizeof(ret));
144 VALGRIND_MAKE_MEM_UNDEFINED(key, 32);
145 VALGRIND_MAKE_MEM_UNDEFINED(&keypair, sizeof(keypair));
146 ret = secp256k1_keypair_sec(ctx, key, &keypair);
147 VALGRIND_MAKE_MEM_DEFINED(&ret, sizeof(ret));
151 #ifdef ENABLE_MODULE_SCHNORRSIG
152 VALGRIND_MAKE_MEM_UNDEFINED(key, 32);
153 ret = secp256k1_keypair_create(ctx, &keypair, key);
154 VALGRIND_MAKE_MEM_DEFINED(&ret, sizeof(ret));
156 ret = secp256k1_schnorrsig_sign(ctx, sig, msg, &keypair, NULL, NULL);
157 VALGRIND_MAKE_MEM_DEFINED(&ret, sizeof(ret));
161 secp256k1_context_destroy(ctx);