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));
98 ctx->auth = SSL_VERIFY_NONE;
100 #ifdef USE_VERSION_1_3
103 rsa_init(&ctx->key, RSA_PKCS_V15, 0);
109 __hidden int __ustream_ssl_set_crt_file(struct ustream_ssl_ctx *ctx, const char *file)
113 #ifdef USE_VERSION_1_3
114 ret = x509_crt_parse_file(&ctx->cert, file);
116 ret = x509parse_crtfile(&ctx->cert, file);
122 ctx->auth = SSL_VERIFY_OPTIONAL;
127 __hidden int __ustream_ssl_set_key_file(struct ustream_ssl_ctx *ctx, const char *file)
131 #ifdef USE_VERSION_1_3
132 ret = pk_parse_keyfile(&ctx->key, file, NULL);
134 ret = x509parse_keyfile(&ctx->key, file, NULL);
142 __hidden void __ustream_ssl_context_free(struct ustream_ssl_ctx *ctx)
144 #ifdef USE_VERSION_1_3
146 x509_crt_free(&ctx->cert);
149 x509_free(&ctx->cert);
154 static void ustream_ssl_error(struct ustream_ssl *us, int ret)
157 uloop_timeout_set(&us->error_timer, 0);
160 static bool ssl_do_wait(int ret)
163 case POLARSSL_ERR_NET_WANT_READ:
164 case POLARSSL_ERR_NET_WANT_WRITE:
171 __hidden enum ssl_conn_status __ustream_ssl_connect(struct ustream_ssl *us)
176 r = ssl_handshake(ssl);
181 return U_SSL_PENDING;
183 ustream_ssl_error(us, r);
187 __hidden int __ustream_ssl_write(struct ustream_ssl *us, const char *buf, int len)
190 int ret = ssl_write(ssl, (const unsigned char *) buf, len);
193 if (ssl_do_wait(ret))
196 ustream_ssl_error(us, ret);
203 __hidden int __ustream_ssl_read(struct ustream_ssl *us, char *buf, int len)
205 int ret = ssl_read(us->ssl, (unsigned char *) buf, len);
208 if (ssl_do_wait(ret))
209 return U_SSL_PENDING;
211 ustream_ssl_error(us, ret);
218 static const int default_ciphersuites[] =
220 #if defined(POLARSSL_AES_C)
221 #if defined(POLARSSL_SHA2_C)
222 TLS_RSA_WITH_AES_256_CBC_SHA256,
223 #endif /* POLARSSL_SHA2_C */
224 #if defined(POLARSSL_GCM_C) && defined(POLARSSL_SHA4_C)
225 TLS_RSA_WITH_AES_256_GCM_SHA384,
226 #endif /* POLARSSL_SHA2_C */
227 TLS_RSA_WITH_AES_256_CBC_SHA,
229 #if defined(POLARSSL_CAMELLIA_C)
230 #if defined(POLARSSL_SHA2_C)
231 TLS_RSA_WITH_CAMELLIA_256_CBC_SHA256,
232 #endif /* POLARSSL_SHA2_C */
233 TLS_RSA_WITH_CAMELLIA_256_CBC_SHA,
235 #if defined(POLARSSL_AES_C)
236 #if defined(POLARSSL_SHA2_C)
237 TLS_RSA_WITH_AES_128_CBC_SHA256,
238 #endif /* POLARSSL_SHA2_C */
239 #if defined(POLARSSL_GCM_C) && defined(POLARSSL_SHA2_C)
240 TLS_RSA_WITH_AES_128_GCM_SHA256,
241 #endif /* POLARSSL_SHA2_C */
242 TLS_RSA_WITH_AES_128_CBC_SHA,
244 #if defined(POLARSSL_CAMELLIA_C)
245 #if defined(POLARSSL_SHA2_C)
246 TLS_RSA_WITH_CAMELLIA_128_CBC_SHA256,
247 #endif /* POLARSSL_SHA2_C */
248 TLS_RSA_WITH_CAMELLIA_128_CBC_SHA,
250 #if defined(POLARSSL_DES_C)
251 TLS_RSA_WITH_3DES_EDE_CBC_SHA,
253 #if defined(POLARSSL_ARC4_C)
254 TLS_RSA_WITH_RC4_128_SHA,
255 TLS_RSA_WITH_RC4_128_MD5,
260 __hidden void *__ustream_ssl_session_new(struct ustream_ssl_ctx *ctx)
265 ssl = calloc(1, sizeof(ssl_context));
279 ssl_set_ciphersuites(ssl, default_ciphersuites);
280 ssl_set_endpoint(ssl, ep);
281 ssl_set_authmode(ssl, ctx->auth);
282 ssl_set_rng(ssl, _urandom, NULL);
286 ssl_set_ca_chain(ssl, ctx->cert.next, NULL, NULL);
287 ssl_set_own_cert(ssl, &ctx->cert, &ctx->key);
290 ssl_session_reset(ssl);
295 __hidden void __ustream_ssl_session_free(void *ssl)