2 * ustream-ssl - library for SSL over ustream
4 * Copyright (C) 2012 Felix Fietkau <nbd@openwrt.org>
6 * Permission to use, copy, modify, and/or distribute this software for any
7 * purpose with or without fee is hereby granted, provided that the above
8 * copyright notice and this permission notice appear in all copies.
10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
19 #include <sys/types.h>
24 #include "ustream-ssl.h"
25 #include "ustream-internal.h"
27 static int urandom_fd
= -1;
29 static int s_ustream_read(void *ctx
, unsigned char *buf
, size_t len
)
31 struct ustream
*s
= ctx
;
38 sbuf
= ustream_get_read_buf(s
, &slen
);
43 return POLARSSL_ERR_NET_WANT_READ
;
45 memcpy(buf
, sbuf
, slen
);
46 ustream_consume(s
, slen
);
51 static int s_ustream_write(void *ctx
, const unsigned char *buf
, size_t len
)
53 struct ustream
*s
= ctx
;
56 ret
= ustream_write(s
, (const char *) buf
, len
, false);
57 if (ret
< 0 || s
->write_error
)
58 return POLARSSL_ERR_NET_SEND_FAILED
;
63 __hidden
void ustream_set_io(struct ustream_ssl_ctx
*ctx
, void *ssl
, struct ustream
*conn
)
65 ssl_set_bio(ssl
, s_ustream_read
, conn
, s_ustream_write
, conn
);
68 static bool urandom_init(void)
73 urandom_fd
= open("/dev/urandom", O_RDONLY
);
80 static int _urandom(void *ctx
, unsigned char *out
, size_t len
)
82 if (read(urandom_fd
, out
, len
) < 0)
83 return POLARSSL_ERR_ENTROPY_SOURCE_FAILED
;
88 __hidden
struct ustream_ssl_ctx
*
89 __ustream_ssl_context_new(bool server
)
91 struct ustream_ssl_ctx
*ctx
;
96 ctx
= calloc(1, sizeof(*ctx
));
100 ctx
->server
= server
;
101 #ifdef USE_VERSION_1_3
104 rsa_init(&ctx
->key
, RSA_PKCS_V15
, 0);
110 __hidden
int __ustream_ssl_add_ca_crt_file(struct ustream_ssl_ctx
*ctx
, const char *file
)
114 #ifdef USE_VERSION_1_3
115 ret
= x509_crt_parse_file(&ctx
->ca_cert
, file
);
117 ret
= x509parse_crtfile(&ctx
->ca_cert
, file
);
125 __hidden
int __ustream_ssl_set_crt_file(struct ustream_ssl_ctx
*ctx
, const char *file
)
129 #ifdef USE_VERSION_1_3
130 ret
= x509_crt_parse_file(&ctx
->cert
, file
);
132 ret
= x509parse_crtfile(&ctx
->cert
, file
);
140 __hidden
int __ustream_ssl_set_key_file(struct ustream_ssl_ctx
*ctx
, const char *file
)
144 #ifdef USE_VERSION_1_3
145 ret
= pk_parse_keyfile(&ctx
->key
, file
, NULL
);
147 ret
= x509parse_keyfile(&ctx
->key
, file
, NULL
);
155 __hidden
void __ustream_ssl_context_free(struct ustream_ssl_ctx
*ctx
)
157 #ifdef USE_VERSION_1_3
159 x509_crt_free(&ctx
->cert
);
162 x509_free(&ctx
->cert
);
167 static void ustream_ssl_error(struct ustream_ssl
*us
, int ret
)
170 uloop_timeout_set(&us
->error_timer
, 0);
173 static bool ssl_do_wait(int ret
)
176 case POLARSSL_ERR_NET_WANT_READ
:
177 case POLARSSL_ERR_NET_WANT_WRITE
:
184 static void ustream_ssl_verify_cert(struct ustream_ssl
*us
)
187 const char *msg
= NULL
;
191 r
= ssl_get_verify_result(ssl
);
192 cn_mismatch
= r
& BADCERT_CN_MISMATCH
;
193 r
&= ~BADCERT_CN_MISMATCH
;
195 if (r
& BADCERT_EXPIRED
)
196 msg
= "certificate has expired";
197 else if (r
& BADCERT_REVOKED
)
198 msg
= "certificate has been revoked";
199 else if (r
& BADCERT_NOT_TRUSTED
)
200 msg
= "certificate is self-signed or not signed by a trusted CA";
202 msg
= "unknown error";
205 if (us
->notify_verify_error
)
206 us
->notify_verify_error(us
, r
, msg
);
214 __hidden
enum ssl_conn_status
__ustream_ssl_connect(struct ustream_ssl
*us
)
219 r
= ssl_handshake(ssl
);
221 ustream_ssl_verify_cert(us
);
226 return U_SSL_PENDING
;
228 ustream_ssl_error(us
, r
);
232 __hidden
int __ustream_ssl_write(struct ustream_ssl
*us
, const char *buf
, int len
)
235 int done
= 0, ret
= 0;
237 while (done
!= len
) {
238 ret
= ssl_write(ssl
, (const unsigned char *) buf
+ done
, len
- done
);
241 if (ssl_do_wait(ret
))
244 ustream_ssl_error(us
, ret
);
254 __hidden
int __ustream_ssl_read(struct ustream_ssl
*us
, char *buf
, int len
)
256 int ret
= ssl_read(us
->ssl
, (unsigned char *) buf
, len
);
259 if (ssl_do_wait(ret
))
260 return U_SSL_PENDING
;
262 ustream_ssl_error(us
, ret
);
269 static const int default_ciphersuites
[] =
271 #if defined(POLARSSL_AES_C)
272 #if defined(POLARSSL_SHA2_C)
273 TLS_RSA_WITH_AES_256_CBC_SHA256
,
274 #endif /* POLARSSL_SHA2_C */
275 #if defined(POLARSSL_GCM_C) && defined(POLARSSL_SHA4_C)
276 TLS_RSA_WITH_AES_256_GCM_SHA384
,
277 #endif /* POLARSSL_SHA2_C */
278 TLS_RSA_WITH_AES_256_CBC_SHA
,
280 #if defined(POLARSSL_CAMELLIA_C)
281 #if defined(POLARSSL_SHA2_C)
282 TLS_RSA_WITH_CAMELLIA_256_CBC_SHA256
,
283 #endif /* POLARSSL_SHA2_C */
284 TLS_RSA_WITH_CAMELLIA_256_CBC_SHA
,
286 #if defined(POLARSSL_AES_C)
287 #if defined(POLARSSL_SHA2_C)
288 TLS_RSA_WITH_AES_128_CBC_SHA256
,
289 #endif /* POLARSSL_SHA2_C */
290 #if defined(POLARSSL_GCM_C) && defined(POLARSSL_SHA2_C)
291 TLS_RSA_WITH_AES_128_GCM_SHA256
,
292 #endif /* POLARSSL_SHA2_C */
293 TLS_RSA_WITH_AES_128_CBC_SHA
,
295 #if defined(POLARSSL_CAMELLIA_C)
296 #if defined(POLARSSL_SHA2_C)
297 TLS_RSA_WITH_CAMELLIA_128_CBC_SHA256
,
298 #endif /* POLARSSL_SHA2_C */
299 TLS_RSA_WITH_CAMELLIA_128_CBC_SHA
,
301 #if defined(POLARSSL_DES_C)
302 TLS_RSA_WITH_3DES_EDE_CBC_SHA
,
304 #if defined(POLARSSL_ARC4_C)
305 TLS_RSA_WITH_RC4_128_SHA
,
306 TLS_RSA_WITH_RC4_128_MD5
,
311 __hidden
void *__ustream_ssl_session_new(struct ustream_ssl_ctx
*ctx
)
317 ssl
= calloc(1, sizeof(ssl_context
));
328 auth
= SSL_VERIFY_NONE
;
331 auth
= SSL_VERIFY_OPTIONAL
;
334 ssl_set_ciphersuites(ssl
, default_ciphersuites
);
335 ssl_set_endpoint(ssl
, ep
);
336 ssl_set_authmode(ssl
, auth
);
337 ssl_set_rng(ssl
, _urandom
, NULL
);
341 ssl_set_ca_chain(ssl
, ctx
->cert
.next
, NULL
, NULL
);
342 ssl_set_own_cert(ssl
, &ctx
->cert
, &ctx
->key
);
344 ssl_set_ca_chain(ssl
, &ctx
->cert
, NULL
, NULL
);
347 ssl_session_reset(ssl
);
352 __hidden
void __ustream_ssl_session_free(void *ssl
)
358 __hidden
void __ustream_ssl_update_peer_cn(struct ustream_ssl
*us
)
360 struct ustream_ssl_ctx
*ctx
= us
->ctx
;
362 ssl_set_ca_chain(us
->ssl
, &ctx
->ca_cert
, NULL
, us
->peer_cn
);