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.
21 #include <openssl/x509v3.h>
22 #include "ustream-ssl.h"
23 #include "ustream-internal.h"
25 __hidden struct ustream_ssl_ctx *
26 __ustream_ssl_context_new(bool server)
31 #if OPENSSL_VERSION_NUMBER < 0x10100000L
32 static bool _init = false;
35 SSL_load_error_strings();
39 # define TLS_server_method SSLv23_server_method
40 # define TLS_client_method SSLv23_client_method
44 m = TLS_server_method();
46 m = TLS_client_method();
48 c = SSL_CTX_new((void *) m);
52 SSL_CTX_set_verify(c, SSL_VERIFY_NONE, NULL);
53 SSL_CTX_set_options (c, SSL_OP_NO_COMPRESSION); /* avoid CRIME attack */
54 #if !defined(OPENSSL_NO_ECDH) && !defined(CYASSL_OPENSSL_H_) && OPENSSL_VERSION_NUMBER < 0x10100000L
55 SSL_CTX_set_ecdh_auto(c, 1);
58 #if OPENSSL_VERSION_NUMBER >= 0x10100000L
59 SSL_CTX_set_min_proto_version(c, TLS1_2_VERSION);
61 SSL_CTX_set_options (c, SSL_OP_NO_SSLv2 | SSL_OP_NO_SSLv3 | SSL_OP_NO_TLSv1 | SSL_OP_NO_TLSv1_1);
63 SSL_CTX_set_cipher_list(c, "DEFAULT:!RC4:@STRENGTH");
65 SSL_CTX_set_quiet_shutdown(c, 1);
70 __hidden int __ustream_ssl_add_ca_crt_file(struct ustream_ssl_ctx *ctx, const char *file)
74 ret = SSL_CTX_load_verify_locations((void *) ctx, file, NULL);
81 __hidden int __ustream_ssl_set_crt_file(struct ustream_ssl_ctx *ctx, const char *file)
85 ret = SSL_CTX_use_certificate_chain_file((void *) ctx, file);
87 ret = SSL_CTX_use_certificate_file((void *) ctx, file, SSL_FILETYPE_ASN1);
95 __hidden int __ustream_ssl_set_key_file(struct ustream_ssl_ctx *ctx, const char *file)
99 ret = SSL_CTX_use_PrivateKey_file((void *) ctx, file, SSL_FILETYPE_PEM);
101 ret = SSL_CTX_use_PrivateKey_file((void *) ctx, file, SSL_FILETYPE_ASN1);
109 __hidden void __ustream_ssl_context_free(struct ustream_ssl_ctx *ctx)
111 SSL_CTX_free((void *) ctx);
114 void __ustream_ssl_session_free(void *ssl)
120 static void ustream_ssl_error(struct ustream_ssl *us, int ret)
123 uloop_timeout_set(&us->error_timer, 0);
126 #ifndef CYASSL_OPENSSL_H_
128 static bool ustream_ssl_verify_cn(struct ustream_ssl *us, X509 *cert)
135 ret = X509_check_host(cert, us->peer_cn, 0, X509_CHECK_FLAG_NO_PARTIAL_WILDCARDS, NULL);
140 static void ustream_ssl_verify_cert(struct ustream_ssl *us)
146 res = SSL_get_verify_result(ssl);
147 if (res != X509_V_OK) {
148 if (us->notify_verify_error)
149 us->notify_verify_error(us, res, X509_verify_cert_error_string(res));
153 cert = SSL_get_peer_certificate(ssl);
157 us->valid_cert = true;
158 us->valid_cn = ustream_ssl_verify_cn(us, cert);
164 __hidden enum ssl_conn_status __ustream_ssl_connect(struct ustream_ssl *us)
172 r = SSL_connect(ssl);
175 #ifndef CYASSL_OPENSSL_H_
176 ustream_ssl_verify_cert(us);
181 r = SSL_get_error(ssl, r);
182 if (r == SSL_ERROR_WANT_READ || r == SSL_ERROR_WANT_WRITE)
183 return U_SSL_PENDING;
185 ustream_ssl_error(us, r);
189 __hidden int __ustream_ssl_write(struct ustream_ssl *us, const char *buf, int len)
192 int ret = SSL_write(ssl, buf, len);
195 int err = SSL_get_error(ssl, ret);
196 if (err == SSL_ERROR_WANT_WRITE)
199 ustream_ssl_error(us, err);
206 __hidden int __ustream_ssl_read(struct ustream_ssl *us, char *buf, int len)
208 int ret = SSL_read(us->ssl, buf, len);
211 ret = SSL_get_error(us->ssl, ret);
212 if (ret == SSL_ERROR_WANT_READ)
213 return U_SSL_PENDING;
215 ustream_ssl_error(us, ret);