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;
55 len = ustream_write(s, (const char *) buf, len, false);
56 if (len < 0 || s->write_error)
57 return POLARSSL_ERR_NET_SEND_FAILED;
62 __hidden void ustream_set_io(void *ctx, void *ssl, struct ustream *conn)
64 ssl_set_bio(ssl, s_ustream_read, conn, s_ustream_write, conn);
67 static bool urandom_init(void)
72 urandom_fd = open("/dev/urandom", O_RDONLY);
79 static int _urandom(void *ctx, unsigned char *out, size_t len)
81 read(urandom_fd, out, len);
85 __hidden void * __ustream_ssl_context_new(bool server)
87 struct ustream_polarssl_ctx *uctx;
92 uctx = calloc(1, sizeof(*uctx));
96 uctx->server = server;
97 rsa_init(&uctx->key, RSA_PKCS_V15, 0);
102 __hidden int __ustream_ssl_set_crt_file(void *ctx, const char *file)
104 struct ustream_polarssl_ctx *uctx = ctx;
106 if (x509parse_crtfile(&uctx->cert, file))
112 __hidden int __ustream_ssl_set_key_file(void *ctx, const char *file)
114 struct ustream_polarssl_ctx *uctx = ctx;
116 if (x509parse_keyfile(&uctx->key, file, NULL))
122 __hidden void __ustream_ssl_context_free(void *ctx)
124 struct ustream_polarssl_ctx *uctx = ctx;
126 rsa_free(&uctx->key);
127 x509_free(&uctx->cert);
131 static void ustream_ssl_error(struct ustream_ssl *us, int ret)
134 uloop_timeout_set(&us->error_timer, 0);
137 static bool ssl_do_wait(int ret)
140 case POLARSSL_ERR_NET_WANT_READ:
141 case POLARSSL_ERR_NET_WANT_WRITE:
148 __hidden enum ssl_conn_status __ustream_ssl_connect(struct ustream_ssl *us)
153 r = ssl_handshake(ssl);
158 return U_SSL_PENDING;
160 ustream_ssl_error(us, r);
164 __hidden int __ustream_ssl_write(struct ustream_ssl *us, const char *buf, int len)
167 int ret = ssl_write(ssl, (const unsigned char *) buf, len);
170 if (ssl_do_wait(ret))
173 ustream_ssl_error(us, ret);
180 __hidden int __ustream_ssl_read(struct ustream_ssl *us, char *buf, int len)
182 int ret = ssl_read(us->ssl, (unsigned char *) buf, len);
185 if (ssl_do_wait(ret))
186 return U_SSL_PENDING;
188 ustream_ssl_error(us, ret);
195 static const int default_ciphersuites[] =
197 #if defined(POLARSSL_AES_C)
198 #if defined(POLARSSL_SHA2_C)
199 TLS_RSA_WITH_AES_256_CBC_SHA256,
200 #endif /* POLARSSL_SHA2_C */
201 #if defined(POLARSSL_GCM_C) && defined(POLARSSL_SHA4_C)
202 TLS_RSA_WITH_AES_256_GCM_SHA384,
203 #endif /* POLARSSL_SHA2_C */
204 TLS_RSA_WITH_AES_256_CBC_SHA,
206 #if defined(POLARSSL_CAMELLIA_C)
207 #if defined(POLARSSL_SHA2_C)
208 TLS_RSA_WITH_CAMELLIA_256_CBC_SHA256,
209 #endif /* POLARSSL_SHA2_C */
210 TLS_RSA_WITH_CAMELLIA_256_CBC_SHA,
212 #if defined(POLARSSL_AES_C)
213 #if defined(POLARSSL_SHA2_C)
214 TLS_RSA_WITH_AES_128_CBC_SHA256,
215 #endif /* POLARSSL_SHA2_C */
216 #if defined(POLARSSL_GCM_C) && defined(POLARSSL_SHA2_C)
217 TLS_RSA_WITH_AES_128_GCM_SHA256,
218 #endif /* POLARSSL_SHA2_C */
219 TLS_RSA_WITH_AES_128_CBC_SHA,
221 #if defined(POLARSSL_CAMELLIA_C)
222 #if defined(POLARSSL_SHA2_C)
223 TLS_RSA_WITH_CAMELLIA_128_CBC_SHA256,
224 #endif /* POLARSSL_SHA2_C */
225 TLS_RSA_WITH_CAMELLIA_128_CBC_SHA,
227 #if defined(POLARSSL_DES_C)
228 TLS_RSA_WITH_3DES_EDE_CBC_SHA,
230 #if defined(POLARSSL_ARC4_C)
231 TLS_RSA_WITH_RC4_128_SHA,
232 TLS_RSA_WITH_RC4_128_MD5,
237 __hidden void *__ustream_ssl_session_new(void *ctx)
239 struct ustream_polarssl_ctx *uctx = ctx;
243 ssl = calloc(1, sizeof(ssl_context));
254 auth = SSL_VERIFY_NONE;
257 auth = SSL_VERIFY_OPTIONAL;
260 ssl_set_ciphersuites(ssl, default_ciphersuites);
261 ssl_set_endpoint(ssl, ep);
262 ssl_set_authmode(ssl, auth);
263 ssl_set_rng(ssl, _urandom, NULL);
267 ssl_set_ca_chain(ssl, uctx->cert.next, NULL, NULL);
268 ssl_set_own_cert(ssl, &uctx->cert, &uctx->key);
271 ssl_session_reset(ssl);
276 __hidden void __ustream_ssl_session_free(void *ssl)