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,
305 #if defined(POLARSSL_ARC4_C)
306 TLS_RSA_WITH_RC4_128_SHA,
307 TLS_RSA_WITH_RC4_128_MD5,
312 __hidden void *__ustream_ssl_session_new(struct ustream_ssl_ctx *ctx)
318 ssl = calloc(1, sizeof(ssl_context));
329 auth = SSL_VERIFY_NONE;
332 auth = SSL_VERIFY_OPTIONAL;
335 ssl_set_ciphersuites(ssl, default_ciphersuites);
336 ssl_set_endpoint(ssl, ep);
337 ssl_set_authmode(ssl, auth);
338 ssl_set_rng(ssl, _urandom, NULL);
342 ssl_set_ca_chain(ssl, ctx->cert.next, NULL, NULL);
343 ssl_set_own_cert(ssl, &ctx->cert, &ctx->key);
345 ssl_set_ca_chain(ssl, &ctx->cert, NULL, NULL);
348 ssl_session_reset(ssl);
353 __hidden void __ustream_ssl_session_free(void *ssl)
359 __hidden void __ustream_ssl_update_peer_cn(struct ustream_ssl *us)
361 struct ustream_ssl_ctx *ctx = us->ctx;
363 ssl_set_ca_chain(us->ssl, &ctx->ca_cert, NULL, us->peer_cn);