1 /* Copyright (c) 2016, Google Inc.
2 *
3 * Permission to use, copy, modify, and/or distribute this software for any
4 * purpose with or without fee is hereby granted, provided that the above
5 * copyright notice and this permission notice appear in all copies.
6 *
7 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
8 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
9 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
10 * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
11 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
12 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
13 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */
14
15 #include <stdio.h>
16
17 #include <vector>
18
19 #include <openssl/bn.h>
20 #include <openssl/crypto.h>
21 #include <openssl/ec.h>
22 #include <openssl/ec_key.h>
23 #include <openssl/ecdsa.h>
24 #include <openssl/nid.h>
25
26 #include "../test/file_test.h"
27
28
GetCurve(FileTest * t,const char * key)29 static bssl::UniquePtr<EC_GROUP> GetCurve(FileTest *t, const char *key) {
30 std::string curve_name;
31 if (!t->GetAttribute(&curve_name, key)) {
32 return nullptr;
33 }
34
35 if (curve_name == "P-224") {
36 return bssl::UniquePtr<EC_GROUP>(EC_GROUP_new_by_curve_name(NID_secp224r1));
37 }
38 if (curve_name == "P-256") {
39 return bssl::UniquePtr<EC_GROUP>(
40 EC_GROUP_new_by_curve_name(NID_X9_62_prime256v1));
41 }
42 if (curve_name == "P-384") {
43 return bssl::UniquePtr<EC_GROUP>(EC_GROUP_new_by_curve_name(NID_secp384r1));
44 }
45 if (curve_name == "P-521") {
46 return bssl::UniquePtr<EC_GROUP>(EC_GROUP_new_by_curve_name(NID_secp521r1));
47 }
48
49 t->PrintLine("Unknown curve '%s'", curve_name.c_str());
50 return nullptr;
51 }
52
GetBIGNUM(FileTest * t,const char * key)53 static bssl::UniquePtr<BIGNUM> GetBIGNUM(FileTest *t, const char *key) {
54 std::vector<uint8_t> bytes;
55 if (!t->GetBytes(&bytes, key)) {
56 return nullptr;
57 }
58
59 return bssl::UniquePtr<BIGNUM>(BN_bin2bn(bytes.data(), bytes.size(), nullptr));
60 }
61
TestECDSASign(FileTest * t,void * arg)62 static bool TestECDSASign(FileTest *t, void *arg) {
63 bssl::UniquePtr<EC_GROUP> group = GetCurve(t, "Curve");
64 bssl::UniquePtr<BIGNUM> x = GetBIGNUM(t, "X");
65 bssl::UniquePtr<BIGNUM> y = GetBIGNUM(t, "Y");
66 bssl::UniquePtr<BIGNUM> r = GetBIGNUM(t, "R");
67 bssl::UniquePtr<BIGNUM> s = GetBIGNUM(t, "S");
68 std::vector<uint8_t> digest;
69 if (!group || !x || !y || !r || !s ||
70 !t->GetBytes(&digest, "Digest")) {
71 return false;
72 }
73
74 bssl::UniquePtr<EC_KEY> key(EC_KEY_new());
75 bssl::UniquePtr<EC_POINT> pub_key(EC_POINT_new(group.get()));
76 bssl::UniquePtr<ECDSA_SIG> sig(ECDSA_SIG_new());
77 if (!key || !pub_key || !sig ||
78 !EC_KEY_set_group(key.get(), group.get()) ||
79 !EC_POINT_set_affine_coordinates_GFp(group.get(), pub_key.get(), x.get(),
80 y.get(), nullptr) ||
81 !EC_KEY_set_public_key(key.get(), pub_key.get()) ||
82 !BN_copy(sig->r, r.get()) ||
83 !BN_copy(sig->s, s.get())) {
84 return false;
85 }
86
87 int ok = ECDSA_do_verify(digest.data(), digest.size(), sig.get(), key.get());
88 if (t->HasAttribute("Invalid")) {
89 if (ok) {
90 t->PrintLine("Signature was incorrectly accepted.");
91 return false;
92 }
93 } else if (!ok) {
94 t->PrintLine("Signature was incorrectly rejected.");
95 return false;
96 }
97
98 return true;
99 }
100
main(int argc,char * argv[])101 int main(int argc, char *argv[]) {
102 CRYPTO_library_init();
103
104 if (argc != 2) {
105 fprintf(stderr, "%s <test file.txt>\n", argv[0]);
106 return 1;
107 }
108
109 return FileTestMain(TestECDSASign, nullptr, argv[1]);
110 }
111