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| 1 | +/********************************************************************** |
| 2 | + * Copyright (c) 2020 Gregory Maxwell * |
| 3 | + * Distributed under the MIT software license, see the accompanying * |
| 4 | + * file COPYING or http://www.opensource.org/licenses/mit-license.php.* |
| 5 | + **********************************************************************/ |
| 6 | + |
| 7 | +#include <valgrind/memcheck.h> |
| 8 | +#include "include/secp256k1.h" |
| 9 | +#include "util.h" |
| 10 | + |
| 11 | +#if ENABLE_MODULE_ECDH |
| 12 | +# include "include/secp256k1_ecdh.h" |
| 13 | +#endif |
| 14 | + |
| 15 | +int main(void) { |
| 16 | + secp256k1_context* ctx; |
| 17 | + secp256k1_ecdsa_signature signature; |
| 18 | + secp256k1_pubkey pubkey; |
| 19 | + size_t siglen = 74; |
| 20 | + size_t outputlen = 33; |
| 21 | + int i; |
| 22 | + int ret; |
| 23 | + unsigned char msg[32]; |
| 24 | + unsigned char key[32]; |
| 25 | + unsigned char sig[74]; |
| 26 | + unsigned char spubkey[33]; |
| 27 | + |
| 28 | + if (!RUNNING_ON_VALGRIND) { |
| 29 | + fprintf(stderr, "This test can only usefully be run inside valgrind.\n"); |
| 30 | + fprintf(stderr, "Usage: libtool --mode=execute valgrind ./valgrind_ctime_test\n"); |
| 31 | + exit(1); |
| 32 | + } |
| 33 | + |
| 34 | + /** In theory, testing with a single secret input should be sufficient: |
| 35 | + * If control flow depended on secrets the tool would generate an error. |
| 36 | + */ |
| 37 | + for (i = 0; i < 32; i++) { |
| 38 | + key[i] = i + 65; |
| 39 | + } |
| 40 | + for (i = 0; i < 32; i++) { |
| 41 | + msg[i] = i + 1; |
| 42 | + } |
| 43 | + |
| 44 | + ctx = secp256k1_context_create(SECP256K1_CONTEXT_SIGN | SECP256K1_CONTEXT_DECLASSIFY); |
| 45 | + |
| 46 | + /* Test keygen. */ |
| 47 | + VALGRIND_MAKE_MEM_UNDEFINED(key, 32); |
| 48 | + ret = secp256k1_ec_pubkey_create(ctx, &pubkey, key); |
| 49 | + VALGRIND_MAKE_MEM_DEFINED(&pubkey, sizeof(secp256k1_pubkey)); |
| 50 | + VALGRIND_MAKE_MEM_DEFINED(&ret, sizeof(ret)); |
| 51 | + CHECK(ret); |
| 52 | + CHECK(secp256k1_ec_pubkey_serialize(ctx, spubkey, &outputlen, &pubkey, SECP256K1_EC_COMPRESSED) == 1); |
| 53 | + |
| 54 | + /* Test signing. */ |
| 55 | + VALGRIND_MAKE_MEM_UNDEFINED(key, 32); |
| 56 | + ret = secp256k1_ecdsa_sign(ctx, &signature, msg, key, NULL, NULL); |
| 57 | + VALGRIND_MAKE_MEM_DEFINED(&signature, sizeof(secp256k1_ecdsa_signature)); |
| 58 | + VALGRIND_MAKE_MEM_DEFINED(&ret, sizeof(ret)); |
| 59 | + CHECK(ret); |
| 60 | + CHECK(secp256k1_ecdsa_signature_serialize_der(ctx, sig, &siglen, &signature)); |
| 61 | + |
| 62 | +#if ENABLE_MODULE_ECDH |
| 63 | + /* Test ECDH. */ |
| 64 | + VALGRIND_MAKE_MEM_UNDEFINED(key, 32); |
| 65 | + ret = secp256k1_ecdh(ctx, msg, &pubkey, key, NULL, NULL); |
| 66 | + VALGRIND_MAKE_MEM_DEFINED(&ret, sizeof(ret)); |
| 67 | + CHECK(ret == 1); |
| 68 | +#endif |
| 69 | + |
| 70 | + VALGRIND_MAKE_MEM_UNDEFINED(key, 32); |
| 71 | + ret = secp256k1_ec_seckey_verify(ctx, key); |
| 72 | + VALGRIND_MAKE_MEM_DEFINED(&ret, sizeof(ret)); |
| 73 | + CHECK(ret == 1); |
| 74 | + |
| 75 | + VALGRIND_MAKE_MEM_UNDEFINED(key, 32); |
| 76 | + ret = secp256k1_ec_privkey_negate(ctx, key); |
| 77 | + VALGRIND_MAKE_MEM_DEFINED(&ret, sizeof(ret)); |
| 78 | + CHECK(ret == 1); |
| 79 | + |
| 80 | + VALGRIND_MAKE_MEM_UNDEFINED(key, 32); |
| 81 | + VALGRIND_MAKE_MEM_UNDEFINED(msg, 32); |
| 82 | + ret = secp256k1_ec_privkey_tweak_add(ctx, key, msg); |
| 83 | + VALGRIND_MAKE_MEM_DEFINED(&ret, sizeof(ret)); |
| 84 | + CHECK(ret == 1); |
| 85 | + |
| 86 | + VALGRIND_MAKE_MEM_UNDEFINED(key, 32); |
| 87 | + VALGRIND_MAKE_MEM_UNDEFINED(msg, 32); |
| 88 | + ret = secp256k1_ec_privkey_tweak_mul(ctx, key, msg); |
| 89 | + VALGRIND_MAKE_MEM_DEFINED(&ret, sizeof(ret)); |
| 90 | + CHECK(ret == 1); |
| 91 | + |
| 92 | + /* Test context randomisation. Do this last because it leaves the context tainted. */ |
| 93 | + VALGRIND_MAKE_MEM_UNDEFINED(key, 32); |
| 94 | + ret = secp256k1_context_randomize(ctx, key); |
| 95 | + VALGRIND_MAKE_MEM_DEFINED(&ret, sizeof(ret)); |
| 96 | + CHECK(ret); |
| 97 | + |
| 98 | + secp256k1_context_destroy(ctx); |
| 99 | + return 0; |
| 100 | +} |
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