2 * TLSv1 common routines
3 * Copyright (c) 2006-2011, Jouni Malinen <j@w1.fi>
5 * This software may be distributed under the terms of the BSD license.
6 * See README for more details.
12 #include "crypto/sha1.h"
13 #include "crypto/sha256.h"
15 #include "tlsv1_common.h"
20 * RFC 2246 Section 9: Mandatory to implement TLS_DHE_DSS_WITH_3DES_EDE_CBC_SHA
21 * Add support for commonly used cipher suites; don't bother with exportable
25 static const struct tls_cipher_suite tls_cipher_suites[] = {
26 { TLS_NULL_WITH_NULL_NULL, TLS_KEY_X_NULL, TLS_CIPHER_NULL,
28 { TLS_RSA_WITH_RC4_128_MD5, TLS_KEY_X_RSA, TLS_CIPHER_RC4_128,
30 { TLS_RSA_WITH_RC4_128_SHA, TLS_KEY_X_RSA, TLS_CIPHER_RC4_128,
32 { TLS_RSA_WITH_DES_CBC_SHA, TLS_KEY_X_RSA, TLS_CIPHER_DES_CBC,
34 { TLS_RSA_WITH_3DES_EDE_CBC_SHA, TLS_KEY_X_RSA,
35 TLS_CIPHER_3DES_EDE_CBC, TLS_HASH_SHA },
36 { TLS_DH_anon_WITH_RC4_128_MD5, TLS_KEY_X_DH_anon,
37 TLS_CIPHER_RC4_128, TLS_HASH_MD5 },
38 { TLS_DH_anon_WITH_DES_CBC_SHA, TLS_KEY_X_DH_anon,
39 TLS_CIPHER_DES_CBC, TLS_HASH_SHA },
40 { TLS_DH_anon_WITH_3DES_EDE_CBC_SHA, TLS_KEY_X_DH_anon,
41 TLS_CIPHER_3DES_EDE_CBC, TLS_HASH_SHA },
42 { TLS_RSA_WITH_AES_128_CBC_SHA, TLS_KEY_X_RSA, TLS_CIPHER_AES_128_CBC,
44 { TLS_DH_anon_WITH_AES_128_CBC_SHA, TLS_KEY_X_DH_anon,
45 TLS_CIPHER_AES_128_CBC, TLS_HASH_SHA },
46 { TLS_RSA_WITH_AES_256_CBC_SHA, TLS_KEY_X_RSA, TLS_CIPHER_AES_256_CBC,
48 { TLS_DH_anon_WITH_AES_256_CBC_SHA, TLS_KEY_X_DH_anon,
49 TLS_CIPHER_AES_256_CBC, TLS_HASH_SHA },
50 { TLS_RSA_WITH_AES_128_CBC_SHA256, TLS_KEY_X_RSA,
51 TLS_CIPHER_AES_128_CBC, TLS_HASH_SHA256 },
52 { TLS_RSA_WITH_AES_256_CBC_SHA256, TLS_KEY_X_RSA,
53 TLS_CIPHER_AES_256_CBC, TLS_HASH_SHA256 },
54 { TLS_DH_anon_WITH_AES_128_CBC_SHA256, TLS_KEY_X_DH_anon,
55 TLS_CIPHER_AES_128_CBC, TLS_HASH_SHA256 },
56 { TLS_DH_anon_WITH_AES_256_CBC_SHA256, TLS_KEY_X_DH_anon,
57 TLS_CIPHER_AES_256_CBC, TLS_HASH_SHA256 }
60 #define NUM_ELEMS(a) (sizeof(a) / sizeof((a)[0]))
61 #define NUM_TLS_CIPHER_SUITES NUM_ELEMS(tls_cipher_suites)
64 static const struct tls_cipher_data tls_ciphers[] = {
65 { TLS_CIPHER_NULL, TLS_CIPHER_STREAM, 0, 0, 0,
67 { TLS_CIPHER_IDEA_CBC, TLS_CIPHER_BLOCK, 16, 16, 8,
69 { TLS_CIPHER_RC2_CBC_40, TLS_CIPHER_BLOCK, 5, 16, 0,
70 CRYPTO_CIPHER_ALG_RC2 },
71 { TLS_CIPHER_RC4_40, TLS_CIPHER_STREAM, 5, 16, 0,
72 CRYPTO_CIPHER_ALG_RC4 },
73 { TLS_CIPHER_RC4_128, TLS_CIPHER_STREAM, 16, 16, 0,
74 CRYPTO_CIPHER_ALG_RC4 },
75 { TLS_CIPHER_DES40_CBC, TLS_CIPHER_BLOCK, 5, 8, 8,
76 CRYPTO_CIPHER_ALG_DES },
77 { TLS_CIPHER_DES_CBC, TLS_CIPHER_BLOCK, 8, 8, 8,
78 CRYPTO_CIPHER_ALG_DES },
79 { TLS_CIPHER_3DES_EDE_CBC, TLS_CIPHER_BLOCK, 24, 24, 8,
80 CRYPTO_CIPHER_ALG_3DES },
81 { TLS_CIPHER_AES_128_CBC, TLS_CIPHER_BLOCK, 16, 16, 16,
82 CRYPTO_CIPHER_ALG_AES },
83 { TLS_CIPHER_AES_256_CBC, TLS_CIPHER_BLOCK, 32, 32, 16,
84 CRYPTO_CIPHER_ALG_AES }
87 #define NUM_TLS_CIPHER_DATA NUM_ELEMS(tls_ciphers)
91 * tls_get_cipher_suite - Get TLS cipher suite
92 * @suite: Cipher suite identifier
93 * Returns: Pointer to the cipher data or %NULL if not found
95 const struct tls_cipher_suite * tls_get_cipher_suite(u16 suite)
98 for (i = 0; i < NUM_TLS_CIPHER_SUITES; i++)
99 if (tls_cipher_suites[i].suite == suite)
100 return &tls_cipher_suites[i];
105 const struct tls_cipher_data * tls_get_cipher_data(tls_cipher cipher)
108 for (i = 0; i < NUM_TLS_CIPHER_DATA; i++)
109 if (tls_ciphers[i].cipher == cipher)
110 return &tls_ciphers[i];
115 int tls_server_key_exchange_allowed(tls_cipher cipher)
117 const struct tls_cipher_suite *suite;
119 /* RFC 2246, Section 7.4.3 */
120 suite = tls_get_cipher_suite(cipher);
124 switch (suite->key_exchange) {
125 case TLS_KEY_X_DHE_DSS:
126 case TLS_KEY_X_DHE_DSS_EXPORT:
127 case TLS_KEY_X_DHE_RSA:
128 case TLS_KEY_X_DHE_RSA_EXPORT:
129 case TLS_KEY_X_DH_anon_EXPORT:
130 case TLS_KEY_X_DH_anon:
132 case TLS_KEY_X_RSA_EXPORT:
133 return 1 /* FIX: public key len > 512 bits */;
141 * tls_parse_cert - Parse DER encoded X.509 certificate and get public key
142 * @buf: ASN.1 DER encoded certificate
143 * @len: Length of the buffer
144 * @pk: Buffer for returning the allocated public key
145 * Returns: 0 on success, -1 on failure
147 * This functions parses an ASN.1 DER encoded X.509 certificate and retrieves
148 * the public key from it. The caller is responsible for freeing the public key
149 * by calling crypto_public_key_free().
151 int tls_parse_cert(const u8 *buf, size_t len, struct crypto_public_key **pk)
153 struct x509_certificate *cert;
155 wpa_hexdump(MSG_MSGDUMP, "TLSv1: Parse ASN.1 DER certificate",
158 *pk = crypto_public_key_from_cert(buf, len);
162 cert = x509_certificate_parse(buf, len);
164 wpa_printf(MSG_DEBUG, "TLSv1: Failed to parse X.509 "
170 * verify key usage (must allow encryption)
172 * All certificate profiles, key and cryptographic formats are
173 * defined by the IETF PKIX working group [PKIX]. When a key
174 * usage extension is present, the digitalSignature bit must be
175 * set for the key to be eligible for signing, as described
176 * above, and the keyEncipherment bit must be present to allow
177 * encryption, as described above. The keyAgreement bit must be
178 * set on Diffie-Hellman certificates. (PKIX: RFC 3280)
181 *pk = crypto_public_key_import(cert->public_key, cert->public_key_len);
182 x509_certificate_free(cert);
185 wpa_printf(MSG_ERROR, "TLSv1: Failed to import "
186 "server public key");
194 int tls_verify_hash_init(struct tls_verify_hash *verify)
196 tls_verify_hash_free(verify);
197 verify->md5_client = crypto_hash_init(CRYPTO_HASH_ALG_MD5, NULL, 0);
198 verify->md5_server = crypto_hash_init(CRYPTO_HASH_ALG_MD5, NULL, 0);
199 verify->md5_cert = crypto_hash_init(CRYPTO_HASH_ALG_MD5, NULL, 0);
200 verify->sha1_client = crypto_hash_init(CRYPTO_HASH_ALG_SHA1, NULL, 0);
201 verify->sha1_server = crypto_hash_init(CRYPTO_HASH_ALG_SHA1, NULL, 0);
202 verify->sha1_cert = crypto_hash_init(CRYPTO_HASH_ALG_SHA1, NULL, 0);
203 if (verify->md5_client == NULL || verify->md5_server == NULL ||
204 verify->md5_cert == NULL || verify->sha1_client == NULL ||
205 verify->sha1_server == NULL || verify->sha1_cert == NULL) {
206 tls_verify_hash_free(verify);
210 verify->sha256_client = crypto_hash_init(CRYPTO_HASH_ALG_SHA256, NULL,
212 verify->sha256_server = crypto_hash_init(CRYPTO_HASH_ALG_SHA256, NULL,
214 verify->sha256_cert = crypto_hash_init(CRYPTO_HASH_ALG_SHA256, NULL,
216 if (verify->sha256_client == NULL || verify->sha256_server == NULL ||
217 verify->sha256_cert == NULL) {
218 tls_verify_hash_free(verify);
221 #endif /* CONFIG_TLSV12 */
226 void tls_verify_hash_add(struct tls_verify_hash *verify, const u8 *buf,
229 if (verify->md5_client && verify->sha1_client) {
230 crypto_hash_update(verify->md5_client, buf, len);
231 crypto_hash_update(verify->sha1_client, buf, len);
233 if (verify->md5_server && verify->sha1_server) {
234 crypto_hash_update(verify->md5_server, buf, len);
235 crypto_hash_update(verify->sha1_server, buf, len);
237 if (verify->md5_cert && verify->sha1_cert) {
238 crypto_hash_update(verify->md5_cert, buf, len);
239 crypto_hash_update(verify->sha1_cert, buf, len);
242 if (verify->sha256_client)
243 crypto_hash_update(verify->sha256_client, buf, len);
244 if (verify->sha256_server)
245 crypto_hash_update(verify->sha256_server, buf, len);
246 if (verify->sha256_cert)
247 crypto_hash_update(verify->sha256_cert, buf, len);
248 #endif /* CONFIG_TLSV12 */
252 void tls_verify_hash_free(struct tls_verify_hash *verify)
254 crypto_hash_finish(verify->md5_client, NULL, NULL);
255 crypto_hash_finish(verify->md5_server, NULL, NULL);
256 crypto_hash_finish(verify->md5_cert, NULL, NULL);
257 crypto_hash_finish(verify->sha1_client, NULL, NULL);
258 crypto_hash_finish(verify->sha1_server, NULL, NULL);
259 crypto_hash_finish(verify->sha1_cert, NULL, NULL);
260 verify->md5_client = NULL;
261 verify->md5_server = NULL;
262 verify->md5_cert = NULL;
263 verify->sha1_client = NULL;
264 verify->sha1_server = NULL;
265 verify->sha1_cert = NULL;
267 crypto_hash_finish(verify->sha256_client, NULL, NULL);
268 crypto_hash_finish(verify->sha256_server, NULL, NULL);
269 crypto_hash_finish(verify->sha256_cert, NULL, NULL);
270 verify->sha256_client = NULL;
271 verify->sha256_server = NULL;
272 verify->sha256_cert = NULL;
273 #endif /* CONFIG_TLSV12 */
277 int tls_version_ok(u16 ver)
279 if (ver == TLS_VERSION_1)
282 if (ver == TLS_VERSION_1_1)
284 #endif /* CONFIG_TLSV11 */
286 if (ver == TLS_VERSION_1_2)
288 #endif /* CONFIG_TLSV12 */
294 const char * tls_version_str(u16 ver)
299 case TLS_VERSION_1_1:
301 case TLS_VERSION_1_2:
309 int tls_prf(u16 ver, const u8 *secret, size_t secret_len, const char *label,
310 const u8 *seed, size_t seed_len, u8 *out, size_t outlen)
313 if (ver >= TLS_VERSION_1_2) {
314 tls_prf_sha256(secret, secret_len, label, seed, seed_len,
318 #endif /* CONFIG_TLSV12 */
320 return tls_prf_sha1_md5(secret, secret_len, label, seed, seed_len, out,