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 read(urandom_fd, out, len);
86 __hidden struct ustream_ssl_ctx *
87 __ustream_ssl_context_new(bool server)
89 struct ustream_ssl_ctx *ctx;
94 ctx = calloc(1, sizeof(*ctx));
99 #ifdef USE_VERSION_1_3
102 rsa_init(&ctx->key, RSA_PKCS_V15, 0);
108 __hidden int __ustream_ssl_add_ca_crt_file(struct ustream_ssl_ctx *ctx, const char *file)
112 #ifdef USE_VERSION_1_3
113 ret = x509_crt_parse_file(&ctx->ca_cert, file);
115 ret = x509parse_crtfile(&ctx->ca_cert, file);
123 __hidden int __ustream_ssl_set_crt_file(struct ustream_ssl_ctx *ctx, const char *file)
127 #ifdef USE_VERSION_1_3
128 ret = x509_crt_parse_file(&ctx->cert, file);
130 ret = x509parse_crtfile(&ctx->cert, file);
138 __hidden int __ustream_ssl_set_key_file(struct ustream_ssl_ctx *ctx, const char *file)
142 #ifdef USE_VERSION_1_3
143 ret = pk_parse_keyfile(&ctx->key, file, NULL);
145 ret = x509parse_keyfile(&ctx->key, file, NULL);
153 __hidden void __ustream_ssl_context_free(struct ustream_ssl_ctx *ctx)
155 #ifdef USE_VERSION_1_3
157 x509_crt_free(&ctx->cert);
160 x509_free(&ctx->cert);
165 static void ustream_ssl_error(struct ustream_ssl *us, int ret)
168 uloop_timeout_set(&us->error_timer, 0);
171 static bool ssl_do_wait(int ret)
174 case POLARSSL_ERR_NET_WANT_READ:
175 case POLARSSL_ERR_NET_WANT_WRITE:
182 static void ustream_ssl_verify_cert(struct ustream_ssl *us)
185 const char *msg = NULL;
189 r = ssl_get_verify_result(ssl);
190 cn_mismatch = r & BADCERT_CN_MISMATCH;
191 r &= ~BADCERT_CN_MISMATCH;
193 if (r & BADCERT_EXPIRED)
194 msg = "certificate has expired";
195 else if (r & BADCERT_REVOKED)
196 msg = "certificate has been revoked";
197 else if (r & BADCERT_NOT_TRUSTED)
198 msg = "certificate is self-signed or not signed by a trusted CA";
200 msg = "unknown error";
203 us->notify_verify_error(us, r, msg);
211 __hidden enum ssl_conn_status __ustream_ssl_connect(struct ustream_ssl *us)
216 r = ssl_handshake(ssl);
218 ustream_ssl_verify_cert(us);
223 return U_SSL_PENDING;
225 ustream_ssl_error(us, r);
229 __hidden int __ustream_ssl_write(struct ustream_ssl *us, const char *buf, int len)
232 int ret = ssl_write(ssl, (const unsigned char *) buf, len);
235 if (ssl_do_wait(ret))
238 ustream_ssl_error(us, ret);
245 __hidden int __ustream_ssl_read(struct ustream_ssl *us, char *buf, int len)
247 int ret = ssl_read(us->ssl, (unsigned char *) buf, len);
250 if (ssl_do_wait(ret))
251 return U_SSL_PENDING;
253 ustream_ssl_error(us, ret);
260 static const int default_ciphersuites[] =
262 #if defined(POLARSSL_AES_C)
263 #if defined(POLARSSL_SHA2_C)
264 TLS_RSA_WITH_AES_256_CBC_SHA256,
265 #endif /* POLARSSL_SHA2_C */
266 #if defined(POLARSSL_GCM_C) && defined(POLARSSL_SHA4_C)
267 TLS_RSA_WITH_AES_256_GCM_SHA384,
268 #endif /* POLARSSL_SHA2_C */
269 TLS_RSA_WITH_AES_256_CBC_SHA,
271 #if defined(POLARSSL_CAMELLIA_C)
272 #if defined(POLARSSL_SHA2_C)
273 TLS_RSA_WITH_CAMELLIA_256_CBC_SHA256,
274 #endif /* POLARSSL_SHA2_C */
275 TLS_RSA_WITH_CAMELLIA_256_CBC_SHA,
277 #if defined(POLARSSL_AES_C)
278 #if defined(POLARSSL_SHA2_C)
279 TLS_RSA_WITH_AES_128_CBC_SHA256,
280 #endif /* POLARSSL_SHA2_C */
281 #if defined(POLARSSL_GCM_C) && defined(POLARSSL_SHA2_C)
282 TLS_RSA_WITH_AES_128_GCM_SHA256,
283 #endif /* POLARSSL_SHA2_C */
284 TLS_RSA_WITH_AES_128_CBC_SHA,
286 #if defined(POLARSSL_CAMELLIA_C)
287 #if defined(POLARSSL_SHA2_C)
288 TLS_RSA_WITH_CAMELLIA_128_CBC_SHA256,
289 #endif /* POLARSSL_SHA2_C */
290 TLS_RSA_WITH_CAMELLIA_128_CBC_SHA,
292 #if defined(POLARSSL_DES_C)
293 TLS_RSA_WITH_3DES_EDE_CBC_SHA,
295 #if defined(POLARSSL_ARC4_C)
296 TLS_RSA_WITH_RC4_128_SHA,
297 TLS_RSA_WITH_RC4_128_MD5,
302 __hidden void *__ustream_ssl_session_new(struct ustream_ssl_ctx *ctx)
308 ssl = calloc(1, sizeof(ssl_context));
319 auth = SSL_VERIFY_NONE;
322 auth = SSL_VERIFY_OPTIONAL;
325 ssl_set_ciphersuites(ssl, default_ciphersuites);
326 ssl_set_endpoint(ssl, ep);
327 ssl_set_authmode(ssl, auth);
328 ssl_set_rng(ssl, _urandom, NULL);
332 ssl_set_ca_chain(ssl, ctx->cert.next, NULL, NULL);
333 ssl_set_own_cert(ssl, &ctx->cert, &ctx->key);
335 ssl_set_ca_chain(ssl, &ctx->cert, NULL, NULL);
338 ssl_session_reset(ssl);
343 __hidden void __ustream_ssl_session_free(void *ssl)
349 __hidden void __ustream_ssl_update_peer_cn(struct ustream_ssl *us)
351 struct ustream_ssl_ctx *ctx = us->ctx;
353 ssl_set_ca_chain(us->ssl, &ctx->ca_cert, NULL, us->peer_cn);