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>
25 #include "ustream-ssl.h"
26 #include "ustream-internal.h"
28 static int urandom_fd
= -1;
30 static int s_ustream_read(void *ctx
, unsigned char *buf
, size_t len
)
32 struct ustream
*s
= ctx
;
39 sbuf
= ustream_get_read_buf(s
, &slen
);
44 return POLARSSL_ERR_NET_WANT_READ
;
46 memcpy(buf
, sbuf
, slen
);
47 ustream_consume(s
, slen
);
52 static int s_ustream_write(void *ctx
, const unsigned char *buf
, size_t len
)
54 struct ustream
*s
= ctx
;
57 ret
= ustream_write(s
, (const char *) buf
, len
, false);
58 if (ret
< 0 || s
->write_error
)
59 return POLARSSL_ERR_NET_SEND_FAILED
;
64 __hidden
void ustream_set_io(struct ustream_ssl_ctx
*ctx
, void *ssl
, struct ustream
*conn
)
66 ssl_set_bio(ssl
, s_ustream_read
, conn
, s_ustream_write
, conn
);
69 static bool urandom_init(void)
74 urandom_fd
= open("/dev/urandom", O_RDONLY
);
81 static int _urandom(void *ctx
, unsigned char *out
, size_t len
)
83 if (read(urandom_fd
, out
, len
) < 0)
84 return POLARSSL_ERR_ENTROPY_SOURCE_FAILED
;
89 __hidden
struct ustream_ssl_ctx
*
90 __ustream_ssl_context_new(bool server
)
92 struct ustream_ssl_ctx
*ctx
;
97 ctx
= calloc(1, sizeof(*ctx
));
101 ctx
->server
= server
;
102 #ifdef USE_VERSION_1_3
105 rsa_init(&ctx
->key
, RSA_PKCS_V15
, 0);
111 __hidden
int __ustream_ssl_add_ca_crt_file(struct ustream_ssl_ctx
*ctx
, const char *file
)
115 #ifdef USE_VERSION_1_3
116 ret
= x509_crt_parse_file(&ctx
->ca_cert
, file
);
118 ret
= x509parse_crtfile(&ctx
->ca_cert
, file
);
126 __hidden
int __ustream_ssl_set_crt_file(struct ustream_ssl_ctx
*ctx
, const char *file
)
130 #ifdef USE_VERSION_1_3
131 ret
= x509_crt_parse_file(&ctx
->cert
, file
);
133 ret
= x509parse_crtfile(&ctx
->cert
, file
);
141 __hidden
int __ustream_ssl_set_key_file(struct ustream_ssl_ctx
*ctx
, const char *file
)
145 #ifdef USE_VERSION_1_3
146 ret
= pk_parse_keyfile(&ctx
->key
, file
, NULL
);
148 ret
= x509parse_keyfile(&ctx
->key
, file
, NULL
);
156 __hidden
void __ustream_ssl_context_free(struct ustream_ssl_ctx
*ctx
)
158 #ifdef USE_VERSION_1_3
160 x509_crt_free(&ctx
->cert
);
163 x509_free(&ctx
->cert
);
168 static void ustream_ssl_error(struct ustream_ssl
*us
, int ret
)
171 uloop_timeout_set(&us
->error_timer
, 0);
174 static bool ssl_do_wait(int ret
)
177 case POLARSSL_ERR_NET_WANT_READ
:
178 case POLARSSL_ERR_NET_WANT_WRITE
:
185 static void ustream_ssl_verify_cert(struct ustream_ssl
*us
)
188 const char *msg
= NULL
;
192 r
= ssl_get_verify_result(ssl
);
193 cn_mismatch
= r
& BADCERT_CN_MISMATCH
;
194 r
&= ~BADCERT_CN_MISMATCH
;
196 if (r
& BADCERT_EXPIRED
)
197 msg
= "certificate has expired";
198 else if (r
& BADCERT_REVOKED
)
199 msg
= "certificate has been revoked";
200 else if (r
& BADCERT_NOT_TRUSTED
)
201 msg
= "certificate is self-signed or not signed by a trusted CA";
203 msg
= "unknown error";
206 if (us
->notify_verify_error
)
207 us
->notify_verify_error(us
, r
, msg
);
215 __hidden
enum ssl_conn_status
__ustream_ssl_connect(struct ustream_ssl
*us
)
220 r
= ssl_handshake(ssl
);
222 ustream_ssl_verify_cert(us
);
227 return U_SSL_PENDING
;
229 ustream_ssl_error(us
, r
);
233 __hidden
int __ustream_ssl_write(struct ustream_ssl
*us
, const char *buf
, int len
)
236 int done
= 0, ret
= 0;
238 while (done
!= len
) {
239 ret
= ssl_write(ssl
, (const unsigned char *) buf
+ done
, len
- done
);
242 if (ssl_do_wait(ret
))
245 ustream_ssl_error(us
, ret
);
255 __hidden
int __ustream_ssl_read(struct ustream_ssl
*us
, char *buf
, int len
)
257 int ret
= ssl_read(us
->ssl
, (unsigned char *) buf
, len
);
260 if (ssl_do_wait(ret
))
261 return U_SSL_PENDING
;
263 ustream_ssl_error(us
, ret
);
270 static const int default_ciphersuites
[] =
272 #if defined(POLARSSL_AES_C)
273 #if defined(POLARSSL_SHA2_C)
274 TLS_RSA_WITH_AES_256_CBC_SHA256
,
275 #endif /* POLARSSL_SHA2_C */
276 #if defined(POLARSSL_GCM_C) && defined(POLARSSL_SHA4_C)
277 TLS_RSA_WITH_AES_256_GCM_SHA384
,
278 #endif /* POLARSSL_SHA2_C */
279 TLS_RSA_WITH_AES_256_CBC_SHA
,
281 #if defined(POLARSSL_CAMELLIA_C)
282 #if defined(POLARSSL_SHA2_C)
283 TLS_RSA_WITH_CAMELLIA_256_CBC_SHA256
,
284 #endif /* POLARSSL_SHA2_C */
285 TLS_RSA_WITH_CAMELLIA_256_CBC_SHA
,
287 #if defined(POLARSSL_AES_C)
288 #if defined(POLARSSL_SHA2_C)
289 TLS_RSA_WITH_AES_128_CBC_SHA256
,
290 #endif /* POLARSSL_SHA2_C */
291 #if defined(POLARSSL_GCM_C) && defined(POLARSSL_SHA2_C)
292 TLS_RSA_WITH_AES_128_GCM_SHA256
,
293 #endif /* POLARSSL_SHA2_C */
294 TLS_RSA_WITH_AES_128_CBC_SHA
,
296 #if defined(POLARSSL_CAMELLIA_C)
297 #if defined(POLARSSL_SHA2_C)
298 TLS_RSA_WITH_CAMELLIA_128_CBC_SHA256
,
299 #endif /* POLARSSL_SHA2_C */
300 TLS_RSA_WITH_CAMELLIA_128_CBC_SHA
,
302 #if defined(POLARSSL_DES_C)
303 TLS_RSA_WITH_3DES_EDE_CBC_SHA
,
308 __hidden
void *__ustream_ssl_session_new(struct ustream_ssl_ctx
*ctx
)
314 ssl
= calloc(1, sizeof(ssl_context
));
325 auth
= SSL_VERIFY_NONE
;
328 auth
= SSL_VERIFY_OPTIONAL
;
331 ssl_set_ciphersuites(ssl
, default_ciphersuites
);
332 ssl_set_endpoint(ssl
, ep
);
333 ssl_set_authmode(ssl
, auth
);
334 ssl_set_rng(ssl
, _urandom
, NULL
);
338 ssl_set_ca_chain(ssl
, ctx
->cert
.next
, NULL
, NULL
);
339 ssl_set_own_cert(ssl
, &ctx
->cert
, &ctx
->key
);
341 ssl_set_ca_chain(ssl
, &ctx
->cert
, NULL
, NULL
);
344 ssl_session_reset(ssl
);
349 __hidden
void __ustream_ssl_session_free(void *ssl
)
355 __hidden
void __ustream_ssl_update_peer_cn(struct ustream_ssl
*us
)
357 struct ustream_ssl_ctx
*ctx
= us
->ctx
;
359 ssl_set_ca_chain(us
->ssl
, &ctx
->ca_cert
, NULL
, us
->peer_cn
);