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/es384.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 short_x[] = \
27 "-----BEGIN PUBLIC KEY-----\n"
28 "MHYwEAYHKoZIzj0CAQYFK4EEACIDYgAEAAZ/VVCUmFU6aH9kJdDnUHCCglkatFTX\n"
29 "onMwIvNYyS8BW/HOoZiOQLs2Hg+qifwaP1pHKILzCVfFmWuZMhxhtmjNXFuOPDnS\n"
30 "Wa1PMdkCoWXA2BbXxnqL9v36gIOcFBil\n"
31 "-----END PUBLIC KEY-----";
32
33 static const char short_y[] = \
34 "-----BEGIN PUBLIC KEY-----\n"
35 "MHYwEAYHKoZIzj0CAQYFK4EEACIDYgAEuDpRBAg87cnWVhxbWnaWlnj100w9pm5k\n"
36 "6T4eYToISaIhEK70TnGwULHX0+qHCYEGACOM7B/ZJbqjo6I7MIXaKZLemGi+tqvy\n"
37 "ajBAsTVSyrYBLQjTMMcaFmYmsxvFx7pK\n"
38 "-----END PUBLIC KEY-----\n";
39
40 static const char brainpoolP384r1[] = \
41 "-----BEGIN PUBLIC KEY-----\n"
42 "MHowFAYHKoZIzj0CAQYJKyQDAwIIAQELA2IABFKswbBzqqyZ4h1zz8rivqHzJxAO\n"
43 "XC2aLyC9x5gwBM7GVu8k6jkX7VypRpg3yyCneiIQ+vVCNXgbDchJ0cPVuhwm3Zru\n"
44 "AK49dezUPahWF0YiJRFVeV+KyB/MEaaZvinzqw==\n"
45 "-----END PUBLIC KEY-----\n";
46
47 static const char secp384r1[] = \
48 "-----BEGIN PUBLIC KEY-----\n"
49 "MHYwEAYHKoZIzj0CAQYFK4EEACIDYgAEdJN9DoqPtTNAOmjnECHBIqnJgyBW0rct\n"
50 "tbUSqQjb6UG2lldmrQJbgCP/ywuXvkkJl4yfXxOr0UP3rgcnqTVA1/46s2TG+R5u\n"
51 "NSQbCM1JPQuvTyFlAn5mdR8ZJJ8yPBQm\n"
52 "-----END PUBLIC KEY-----\n";
53
54 static const unsigned char brainpoolP384r1_raw[] = {
55 0x04, 0x52, 0xac, 0xc1, 0xb0, 0x73, 0xaa, 0xac,
56 0x99, 0xe2, 0x1d, 0x73, 0xcf, 0xca, 0xe2, 0xbe,
57 0xa1, 0xf3, 0x27, 0x10, 0x0e, 0x5c, 0x2d, 0x9a,
58 0x2f, 0x20, 0xbd, 0xc7, 0x98, 0x30, 0x04, 0xce,
59 0xc6, 0x56, 0xef, 0x24, 0xea, 0x39, 0x17, 0xed,
60 0x5c, 0xa9, 0x46, 0x98, 0x37, 0xcb, 0x20, 0xa7,
61 0x7a, 0x22, 0x10, 0xfa, 0xf5, 0x42, 0x35, 0x78,
62 0x1b, 0x0d, 0xc8, 0x49, 0xd1, 0xc3, 0xd5, 0xba,
63 0x1c, 0x26, 0xdd, 0x9a, 0xee, 0x00, 0xae, 0x3d,
64 0x75, 0xec, 0xd4, 0x3d, 0xa8, 0x56, 0x17, 0x46,
65 0x22, 0x25, 0x11, 0x55, 0x79, 0x5f, 0x8a, 0xc8,
66 0x1f, 0xcc, 0x11, 0xa6, 0x99, 0xbe, 0x29, 0xf3,
67 0xab,
68 };
69
70 static const unsigned char secp384r1_raw[] = {
71 0x04, 0x74, 0x93, 0x7d, 0x0e, 0x8a, 0x8f, 0xb5,
72 0x33, 0x40, 0x3a, 0x68, 0xe7, 0x10, 0x21, 0xc1,
73 0x22, 0xa9, 0xc9, 0x83, 0x20, 0x56, 0xd2, 0xb7,
74 0x2d, 0xb5, 0xb5, 0x12, 0xa9, 0x08, 0xdb, 0xe9,
75 0x41, 0xb6, 0x96, 0x57, 0x66, 0xad, 0x02, 0x5b,
76 0x80, 0x23, 0xff, 0xcb, 0x0b, 0x97, 0xbe, 0x49,
77 0x09, 0x97, 0x8c, 0x9f, 0x5f, 0x13, 0xab, 0xd1,
78 0x43, 0xf7, 0xae, 0x07, 0x27, 0xa9, 0x35, 0x40,
79 0xd7, 0xfe, 0x3a, 0xb3, 0x64, 0xc6, 0xf9, 0x1e,
80 0x6e, 0x35, 0x24, 0x1b, 0x08, 0xcd, 0x49, 0x3d,
81 0x0b, 0xaf, 0x4f, 0x21, 0x65, 0x02, 0x7e, 0x66,
82 0x75, 0x1f, 0x19, 0x24, 0x9f, 0x32, 0x3c, 0x14,
83 0x26,
84 };
85
86 static EVP_PKEY *
EVP_PKEY_from_PEM(const char * ptr,size_t len)87 EVP_PKEY_from_PEM(const char *ptr, size_t len)
88 {
89 BIO *bio = NULL;
90 EVP_PKEY *pkey = NULL;
91
92 if ((bio = BIO_new(BIO_s_mem())) == NULL) {
93 warnx("BIO_new");
94 goto out;
95 }
96 if (len > INT_MAX || BIO_write(bio, ptr, (int)len) != (int)len) {
97 warnx("BIO_write");
98 goto out;
99 }
100 if ((pkey = PEM_read_bio_PUBKEY(bio, NULL, NULL, NULL)) == NULL)
101 warnx("PEM_read_bio_PUBKEY");
102 out:
103 BIO_free(bio);
104
105 return pkey;
106 }
107
108 static int
es384_pk_cmp(const char * ptr,size_t len)109 es384_pk_cmp(const char *ptr, size_t len)
110 {
111 EVP_PKEY *pkA = NULL;
112 EVP_PKEY *pkB = NULL;
113 es384_pk_t *k = NULL;
114 int r, ok = -1;
115
116 if ((pkA = EVP_PKEY_from_PEM(ptr, len)) == NULL) {
117 warnx("EVP_PKEY_from_PEM");
118 goto out;
119 }
120 if ((k = es384_pk_new()) == NULL) {
121 warnx("es384_pk_new");
122 goto out;
123 }
124 if ((r = es384_pk_from_EVP_PKEY(k, pkA)) != FIDO_OK) {
125 warnx("es384_pk_from_EVP_PKEY: 0x%x", r);
126 goto out;
127 }
128 if ((pkB = es384_pk_to_EVP_PKEY(k)) == NULL) {
129 warnx("es384_pk_to_EVP_PKEY");
130 goto out;
131 }
132 if ((r = EVP_PKEY_cmp(pkA, pkB)) != 1) {
133 warnx("EVP_PKEY_cmp: %d", r);
134 goto out;
135 }
136
137 ok = 0;
138 out:
139 EVP_PKEY_free(pkA);
140 EVP_PKEY_free(pkB);
141 es384_pk_free(&k);
142
143 return ok;
144 }
145
146 static void
short_coord(void)147 short_coord(void)
148 {
149 assert(es384_pk_cmp(short_x, sizeof(short_x)) == 0);
150 assert(es384_pk_cmp(short_y, sizeof(short_y)) == 0);
151 }
152
153 static void
invalid_curve(const unsigned char * raw,size_t raw_len)154 invalid_curve(const unsigned char *raw, size_t raw_len)
155 {
156 EVP_PKEY *pkey;
157 es384_pk_t *pk;
158
159 pkey = EVP_PKEY_from_PEM(brainpoolP384r1, sizeof(brainpoolP384r1));
160 if (pkey == NULL)
161 return; /* assume no brainpool support in libcrypto */
162 ASSERT_NOT_NULL((pk = es384_pk_new()));
163 ASSERT_INVAL(es384_pk_from_EVP_PKEY(pk, pkey));
164 ASSERT_INVAL(es384_pk_from_ptr(pk, raw, raw_len));
165 ASSERT_NULL(es384_pk_to_EVP_PKEY((const es384_pk_t *)raw));
166
167 EVP_PKEY_free(pkey);
168 es384_pk_free(&pk);
169 }
170
171 static void
full_coord(void)172 full_coord(void)
173 {
174 assert(es384_pk_cmp(secp384r1, sizeof(secp384r1)) == 0);
175 }
176
177 static void
valid_curve(const unsigned char * raw,size_t raw_len)178 valid_curve(const unsigned char *raw, size_t raw_len)
179 {
180 EVP_PKEY *pkeyA;
181 EVP_PKEY *pkeyB;
182 es384_pk_t *pkA;
183 es384_pk_t *pkB;
184
185 ASSERT_NOT_NULL((pkeyA = EVP_PKEY_from_PEM(secp384r1, sizeof(secp384r1))));
186 ASSERT_NOT_NULL((pkA = es384_pk_new()));
187 ASSERT_NOT_NULL((pkB = es384_pk_new()));
188 ASSERT_OK(es384_pk_from_EVP_PKEY(pkA, pkeyA));
189 ASSERT_OK(es384_pk_from_ptr(pkB, raw, raw_len));
190 ASSERT_NOT_NULL((pkeyB = es384_pk_to_EVP_PKEY(pkB)));
191 assert(EVP_PKEY_cmp(pkeyA, pkeyB) == 1);
192
193 EVP_PKEY_free(pkeyA);
194 EVP_PKEY_free(pkeyB);
195 es384_pk_free(&pkA);
196 es384_pk_free(&pkB);
197 }
198
199 int
main(void)200 main(void)
201 {
202 fido_init(0);
203
204 short_coord();
205 full_coord();
206
207 invalid_curve(brainpoolP384r1_raw, sizeof(brainpoolP384r1_raw)); /* uncompressed */
208 invalid_curve(brainpoolP384r1_raw + 1, sizeof(brainpoolP384r1_raw) - 1); /* libfido2 */
209 valid_curve(secp384r1_raw, sizeof(secp384r1_raw)); /* uncompressed */
210 valid_curve(secp384r1_raw + 1, sizeof(secp384r1_raw) - 1); /* libfido2 */
211
212 exit(0);
213 }
214