1 /*
2 * Copyright (c) 2022 Yubico AB. All rights reserved.
3 * Use of this source code is governed by a BSD-style
4 * license that can be found in the LICENSE file.
5 * SPDX-License-Identifier: BSD-2-Clause
6 */
7
8 #undef NDEBUG
9
10 #include <assert.h>
11 #include <string.h>
12
13 #define _FIDO_INTERNAL
14
15 #include <fido.h>
16 #include <fido/eddsa.h>
17
18 #include <openssl/bio.h>
19 #include <openssl/pem.h>
20
21 #define ASSERT_NOT_NULL(e) assert((e) != NULL)
22 #define ASSERT_NULL(e) assert((e) == NULL)
23 #define ASSERT_INVAL(e) assert((e) == FIDO_ERR_INVALID_ARGUMENT)
24 #define ASSERT_OK(e) assert((e) == FIDO_OK)
25
26 static const char ecdsa[] = \
27 "-----BEGIN PUBLIC KEY-----\n"
28 "MFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAEOwiq14c80b7C1Jzsx5w1zMvk2GgW\n"
29 "5kfGMOKXjwF/U+51ZfBDKehs3ivdeXAJBkxIh7E3iA32s+HyNqk+ntl9fg==\n"
30 "-----END PUBLIC KEY-----\n";
31
32 static const char eddsa[] = \
33 "-----BEGIN PUBLIC KEY-----\n"
34 "MCowBQYDK2VwAyEADt/RHErAxAHxH9FUmsjOhQ2ALl6Y8nE0m3zQxkEE2iM=\n"
35 "-----END PUBLIC KEY-----\n";
36
37 static const unsigned char eddsa_raw[] = {
38 0x0e, 0xdf, 0xd1, 0x1c, 0x4a, 0xc0, 0xc4, 0x01,
39 0xf1, 0x1f, 0xd1, 0x54, 0x9a, 0xc8, 0xce, 0x85,
40 0x0d, 0x80, 0x2e, 0x5e, 0x98, 0xf2, 0x71, 0x34,
41 0x9b, 0x7c, 0xd0, 0xc6, 0x41, 0x04, 0xda, 0x23,
42 };
43
44 static EVP_PKEY *
EVP_PKEY_from_PEM(const char * ptr,size_t len)45 EVP_PKEY_from_PEM(const char *ptr, size_t len)
46 {
47 BIO *bio = NULL;
48 EVP_PKEY *pkey = NULL;
49
50 if ((bio = BIO_new(BIO_s_mem())) == NULL) {
51 warnx("BIO_new");
52 goto out;
53 }
54 if (len > INT_MAX || BIO_write(bio, ptr, (int)len) != (int)len) {
55 warnx("BIO_write");
56 goto out;
57 }
58 if ((pkey = PEM_read_bio_PUBKEY(bio, NULL, NULL, NULL)) == NULL)
59 warnx("PEM_read_bio_PUBKEY");
60 out:
61 BIO_free(bio);
62
63 return pkey;
64 }
65
66 static int
eddsa_pk_cmp(const char * ptr,size_t len)67 eddsa_pk_cmp(const char *ptr, size_t len)
68 {
69 EVP_PKEY *pkA = NULL;
70 EVP_PKEY *pkB = NULL;
71 eddsa_pk_t *k = NULL;
72 int r, ok = -1;
73
74 if ((pkA = EVP_PKEY_from_PEM(ptr, len)) == NULL) {
75 warnx("EVP_PKEY_from_PEM");
76 goto out;
77 }
78 if ((k = eddsa_pk_new()) == NULL) {
79 warnx("eddsa_pk_new");
80 goto out;
81 }
82 if ((r = eddsa_pk_from_EVP_PKEY(k, pkA)) != FIDO_OK) {
83 warnx("eddsa_pk_from_EVP_PKEY: 0x%x", r);
84 goto out;
85 }
86 if ((pkB = eddsa_pk_to_EVP_PKEY(k)) == NULL) {
87 warnx("eddsa_pk_to_EVP_PKEY");
88 goto out;
89 }
90 if ((r = EVP_PKEY_cmp(pkA, pkB)) != 1) {
91 warnx("EVP_PKEY_cmp: %d", r);
92 goto out;
93 }
94
95 ok = 0;
96 out:
97 EVP_PKEY_free(pkA);
98 EVP_PKEY_free(pkB);
99 eddsa_pk_free(&k);
100
101 return ok;
102 }
103
104 static void
invalid_key(void)105 invalid_key(void)
106 {
107 EVP_PKEY *pkey;
108 eddsa_pk_t *pk;
109
110 ASSERT_NOT_NULL((pkey = EVP_PKEY_from_PEM(ecdsa, sizeof(ecdsa))));
111 ASSERT_NOT_NULL((pk = eddsa_pk_new()));
112 ASSERT_INVAL(eddsa_pk_from_EVP_PKEY(pk, pkey));
113
114 EVP_PKEY_free(pkey);
115 eddsa_pk_free(&pk);
116 }
117
118 static void
valid_key(void)119 valid_key(void)
120 {
121 EVP_PKEY *pkeyA = NULL;
122 EVP_PKEY *pkeyB = NULL;
123 eddsa_pk_t *pkA = NULL;
124 eddsa_pk_t *pkB = NULL;
125
126 #if defined(LIBRESSL_VERSION_NUMBER) && LIBRESSL_VERSION_NUMBER < 0x3070000f
127 /* incomplete support; test what we can */
128 ASSERT_NULL(EVP_PKEY_from_PEM(eddsa, sizeof(eddsa)));
129 ASSERT_NOT_NULL((pkB = eddsa_pk_new()));
130 ASSERT_INVAL(eddsa_pk_from_ptr(pkB, eddsa_raw, sizeof(eddsa_raw)));
131 ASSERT_NULL(eddsa_pk_to_EVP_PKEY((const eddsa_pk_t *)eddsa_raw));
132 assert(eddsa_pk_cmp(eddsa, sizeof(eddsa)) < 0);
133 #else
134 ASSERT_NOT_NULL((pkeyA = EVP_PKEY_from_PEM(eddsa, sizeof(eddsa))));
135 ASSERT_NOT_NULL((pkA = eddsa_pk_new()));
136 ASSERT_NOT_NULL((pkB = eddsa_pk_new()));
137 ASSERT_OK(eddsa_pk_from_EVP_PKEY(pkA, pkeyA));
138 ASSERT_OK(eddsa_pk_from_ptr(pkB, eddsa_raw, sizeof(eddsa_raw)));
139 ASSERT_NOT_NULL((pkeyB = eddsa_pk_to_EVP_PKEY((const eddsa_pk_t *)eddsa_raw)));
140 assert(EVP_PKEY_cmp(pkeyA, pkeyB) == 1);
141 assert(eddsa_pk_cmp(eddsa, sizeof(eddsa)) == 0);
142 #endif
143
144 EVP_PKEY_free(pkeyA);
145 EVP_PKEY_free(pkeyB);
146 eddsa_pk_free(&pkA);
147 eddsa_pk_free(&pkB);
148 }
149
150 int
main(void)151 main(void)
152 {
153 fido_init(0);
154
155 invalid_key();
156 valid_key();
157
158 exit(0);
159 }
160