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.
20 #include <openssl/x509v3.h>
21 #include "ustream-ssl.h"
22 #include "ustream-internal.h"
24 __hidden struct ustream_ssl_ctx *
25 __ustream_ssl_context_new(bool server)
27 static bool _init = false;
32 SSL_load_error_strings();
37 #ifdef CYASSL_OPENSSL_H_
39 m = SSLv23_server_method();
41 m = SSLv23_client_method();
44 m = TLSv1_server_method();
46 m = TLSv1_client_method();
49 c = SSL_CTX_new((void *) m);
53 SSL_CTX_set_verify(c, SSL_VERIFY_NONE, NULL);
58 __hidden int __ustream_ssl_add_ca_crt_file(struct ustream_ssl_ctx *ctx, const char *file)
62 ret = SSL_CTX_load_verify_locations((void *) ctx, file, NULL);
69 __hidden int __ustream_ssl_set_crt_file(struct ustream_ssl_ctx *ctx, const char *file)
73 ret = SSL_CTX_use_certificate_chain_file((void *) ctx, file);
75 ret = SSL_CTX_use_certificate_file((void *) ctx, file, SSL_FILETYPE_ASN1);
83 __hidden int __ustream_ssl_set_key_file(struct ustream_ssl_ctx *ctx, const char *file)
87 ret = SSL_CTX_use_PrivateKey_file((void *) ctx, file, SSL_FILETYPE_PEM);
89 ret = SSL_CTX_use_PrivateKey_file((void *) ctx, file, SSL_FILETYPE_ASN1);
97 __hidden void __ustream_ssl_context_free(struct ustream_ssl_ctx *ctx)
99 SSL_CTX_free((void *) ctx);
102 static void ustream_ssl_error(struct ustream_ssl *us, int ret)
105 uloop_timeout_set(&us->error_timer, 0);
108 static bool host_pattern_match(const unsigned char *pattern, const char *cn)
112 for (; (c = tolower(*pattern++)) != 0; cn++) {
120 c = tolower(*pattern++);
124 if (c == tolower(*cn) &&
125 host_pattern_match(pattern, cn))
137 static bool host_pattern_match_asn1(ASN1_STRING *asn1, const char *cn)
139 unsigned char *pattern;
142 if (ASN1_STRING_to_UTF8(&pattern, asn1) < 0)
148 if (strlen((char *) pattern) == ASN1_STRING_length(asn1))
149 ret = host_pattern_match(pattern, cn);
151 OPENSSL_free(pattern);
156 static bool ustream_ssl_verify_cn_alt(struct ustream_ssl *us, X509 *cert)
158 GENERAL_NAMES *alt_names;
161 alt_names = X509_get_ext_d2i (cert, NID_subject_alt_name, NULL, NULL);
165 n_alt = sk_GENERAL_NAME_num(alt_names);
166 for (i = 0; i < n_alt; i++) {
167 const GENERAL_NAME *name = sk_GENERAL_NAME_value(alt_names, i);
172 if (name->type != GEN_DNS)
175 if (host_pattern_match_asn1(name->d.dNSName, us->peer_cn))
182 static bool ustream_ssl_verify_cn(struct ustream_ssl *us, X509 *cert)
191 if (ustream_ssl_verify_cn_alt(us, cert))
194 xname = X509_get_subject_name(cert);
198 i = X509_NAME_get_index_by_NID(xname, NID_commonName, last);
208 astr = X509_NAME_ENTRY_get_data(X509_NAME_get_entry(xname, last));
210 return host_pattern_match_asn1(astr, us->peer_cn);
214 static void ustream_ssl_verify_cert(struct ustream_ssl *us)
220 cert = SSL_get_peer_certificate(ssl);
224 res = SSL_get_verify_result(ssl);
225 if (res != X509_V_OK) {
226 if (us->notify_verify_error)
227 us->notify_verify_error(us, res, X509_verify_cert_error_string(res));
231 us->valid_cert = true;
232 us->valid_cn = ustream_ssl_verify_cn(us, cert);
235 __hidden enum ssl_conn_status __ustream_ssl_connect(struct ustream_ssl *us)
243 r = SSL_connect(ssl);
246 ustream_ssl_verify_cert(us);
250 r = SSL_get_error(ssl, r);
251 if (r == SSL_ERROR_WANT_READ || r == SSL_ERROR_WANT_WRITE)
252 return U_SSL_PENDING;
254 ustream_ssl_error(us, r);
258 __hidden int __ustream_ssl_write(struct ustream_ssl *us, const char *buf, int len)
261 int ret = SSL_write(ssl, buf, len);
264 int err = SSL_get_error(ssl, ret);
265 if (err == SSL_ERROR_WANT_WRITE)
268 ustream_ssl_error(us, err);
275 __hidden int __ustream_ssl_read(struct ustream_ssl *us, char *buf, int len)
277 int ret = SSL_read(us->ssl, buf, len);
280 ret = SSL_get_error(us->ssl, ret);
281 if (ret == SSL_ERROR_WANT_READ)
282 return U_SSL_PENDING;
284 ustream_ssl_error(us, ret);