* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
+#include <string.h>
#include <ctype.h>
#include <openssl/x509v3.h>
#include "ustream-ssl.h"
#include "ustream-internal.h"
+
+/* Ciphersuite preference:
+ * - key exchange: prefer ECDHE, then DHE(client only), then RSA
+ * - prefer AEAD ciphers:
+ * chacha20-poly1305, the fastest in software, 256-bits
+ * aes128-gcm, 128-bits
+ * aes256-gcm, 256-bits
+ * - CBC ciphers
+ * aes128, aes256, 3DES(client only)
+ */
+
+#define ecdhe_ciphers \
+ "ECDHE-ECDSA-CHACHA20-POLY1305:" \
+ "ECDHE-ECDSA-AES128-GCM-SHA256:" \
+ "ECDHE-ECDSA-AES256-GCM-SHA384:" \
+ "ECDHE-ECDSA-AES128-SHA:" \
+ "ECDHE-ECDSA-AES256-SHA:" \
+ "ECDHE-RSA-CHACHA20-POLY1305:" \
+ "ECDHE-RSA-AES128-GCM-SHA256:" \
+ "ECDHE-RSA-AES256-GCM-SHA384:" \
+ "ECDHE-RSA-AES128-SHA:" \
+ "ECDHE-RSA-AES256-SHA"
+
+#define dhe_ciphers \
+ "DHE-RSA-CHACHA20-POLY1305:" \
+ "DHE-RSA-AES128-GCM-SHA256:" \
+ "DHE-RSA-AES256-GCM-SHA384:" \
+ "DHE-RSA-AES128-SHA:" \
+ "DHE-RSA-AES256-SHA:" \
+ "DHE-DES-CBC3-SHA"
+
+#define non_pfs_aes \
+ "AES128-GCM-SHA256:" \
+ "AES256-GCM-SHA384:" \
+ "AES128-SHA:" \
+ "AES256-SHA"
+
+#define server_cipher_list \
+ ecdhe_ciphers ":" \
+ non_pfs_aes
+
+#define client_cipher_list \
+ ecdhe_ciphers ":" \
+ dhe_ciphers ":" \
+ non_pfs_aes ":" \
+ "DES-CBC3-SHA"
+
__hidden struct ustream_ssl_ctx *
__ustream_ssl_context_new(bool server)
{
- static bool _init = false;
const void *m;
SSL_CTX *c;
+#if OPENSSL_VERSION_NUMBER < 0x10100000L
+ static bool _init = false;
+
if (!_init) {
SSL_load_error_strings();
SSL_library_init();
_init = true;
}
-
-#ifdef CYASSL_OPENSSL_H_
- if (server)
- m = SSLv23_server_method();
- else
- m = SSLv23_client_method();
-#else
- if (server)
- m = TLSv1_server_method();
- else
- m = TLSv1_client_method();
+# define TLS_server_method TLSv1_2_server_method
+# define TLS_client_method SSLv23_client_method
#endif
+ if (server) {
+ m = TLS_server_method();
+ } else
+ m = TLS_client_method();
+
c = SSL_CTX_new((void *) m);
if (!c)
return NULL;
SSL_CTX_set_verify(c, SSL_VERIFY_NONE, NULL);
+ SSL_CTX_set_options(c, SSL_OP_NO_COMPRESSION | SSL_OP_SINGLE_ECDH_USE |
+ SSL_OP_CIPHER_SERVER_PREFERENCE);
+#if defined(SSL_CTX_set_ecdh_auto) && OPENSSL_VERSION_NUMBER < 0x10100000L
+ SSL_CTX_set_ecdh_auto(c, 1);
+#endif
+ if (server) {
+#if OPENSSL_VERSION_NUMBER >= 0x10100000L
+ SSL_CTX_set_min_proto_version(c, TLS1_2_VERSION);
+#endif
+ SSL_CTX_set_cipher_list(c, server_cipher_list);
+ } else {
+ SSL_CTX_set_cipher_list(c, client_cipher_list);
+ }
+ SSL_CTX_set_quiet_shutdown(c, 1);
return (void *) c;
}
SSL_CTX_free((void *) ctx);
}
+void __ustream_ssl_session_free(void *ssl)
+{
+ SSL_shutdown(ssl);
+ SSL_free(ssl);
+}
+
static void ustream_ssl_error(struct ustream_ssl *us, int ret)
{
us->error = ret;
#ifndef CYASSL_OPENSSL_H_
-static bool host_pattern_match(const unsigned char *pattern, const char *cn)
-{
- char c;
-
- for (; (c = tolower(*pattern++)) != 0; cn++) {
- if (c != '*') {
- if (c != *cn)
- return false;
- continue;
- }
-
- do {
- c = tolower(*pattern++);
- } while (c == '*');
-
- while (*cn) {
- if (c == tolower(*cn) &&
- host_pattern_match(pattern, cn))
- return true;
- if (*cn == '.')
- return false;
- cn++;
- }
-
- return !c;
- }
- return !*cn;
-}
-
-static bool host_pattern_match_asn1(ASN1_STRING *asn1, const char *cn)
-{
- unsigned char *pattern;
- bool ret = false;
-
- if (ASN1_STRING_to_UTF8(&pattern, asn1) < 0)
- return false;
-
- if (!pattern)
- return false;
-
- if (strlen((char *) pattern) == ASN1_STRING_length(asn1))
- ret = host_pattern_match(pattern, cn);
-
- OPENSSL_free(pattern);
-
- return ret;
-}
-
-static bool ustream_ssl_verify_cn_alt(struct ustream_ssl *us, X509 *cert)
-{
- GENERAL_NAMES *alt_names;
- int i, n_alt;
-
- alt_names = X509_get_ext_d2i (cert, NID_subject_alt_name, NULL, NULL);
- if (!alt_names)
- return false;
-
- n_alt = sk_GENERAL_NAME_num(alt_names);
- for (i = 0; i < n_alt; i++) {
- const GENERAL_NAME *name = sk_GENERAL_NAME_value(alt_names, i);
-
- if (!name)
- continue;
-
- if (name->type != GEN_DNS)
- continue;
-
- if (host_pattern_match_asn1(name->d.dNSName, us->peer_cn))
- return true;
- }
-
- return false;
-}
-
static bool ustream_ssl_verify_cn(struct ustream_ssl *us, X509 *cert)
{
- ASN1_STRING *astr;
- X509_NAME *xname;
- int i, last;
+ int ret;
if (!us->peer_cn)
return false;
- if (ustream_ssl_verify_cn_alt(us, cert))
- return true;
-
- xname = X509_get_subject_name(cert);
-
- last = -1;
- while (1) {
- i = X509_NAME_get_index_by_NID(xname, NID_commonName, last);
- if (i < 0)
- break;
-
- last = i;
- }
-
- if (last < 0)
- return false;
-
- astr = X509_NAME_ENTRY_get_data(X509_NAME_get_entry(xname, last));
-
- return host_pattern_match_asn1(astr, us->peer_cn);
+ ret = X509_check_host(cert, us->peer_cn, 0, X509_CHECK_FLAG_NO_PARTIAL_WILDCARDS, NULL);
+ return ret == 1;
}
X509 *cert;
int res;
- cert = SSL_get_peer_certificate(ssl);
- if (!cert)
- return;
-
res = SSL_get_verify_result(ssl);
if (res != X509_V_OK) {
if (us->notify_verify_error)
return;
}
+ cert = SSL_get_peer_certificate(ssl);
+ if (!cert)
+ return;
+
us->valid_cert = true;
us->valid_cn = ustream_ssl_verify_cn(us, cert);
+ X509_free(cert);
}
#endif
projects / oweals / openwrt-ustream-ssl.git / blobdiff