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/*
* ustream-ssl - library for SSL over ustream
*
* Copyright (C) 2012 Felix Fietkau <nbd@openwrt.org>
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* 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"
__hidden struct ustream_ssl_ctx *
__ustream_ssl_context_new(bool server)
{
static bool _init = false;
const void *m;
SSL_CTX *c;
if (!_init) {
SSL_load_error_strings();
SSL_library_init();
_init = true;
}
if (server)
#ifdef CYASSL_OPENSSL_H_
m = SSLv23_server_method();
#else
m = TLSv1_2_server_method();
#endif
else
m = SSLv23_client_method();
c = SSL_CTX_new((void *) m);
if (!c)
return NULL;
SSL_CTX_set_verify(c, SSL_VERIFY_NONE, NULL);
#ifndef OPENSSL_NO_ECDH
SSL_CTX_set_ecdh_auto(c, 1);
#endif
SSL_CTX_set_quiet_shutdown(c, 1);
return (void *) c;
}
__hidden int __ustream_ssl_add_ca_crt_file(struct ustream_ssl_ctx *ctx, const char *file)
{
int ret;
ret = SSL_CTX_load_verify_locations((void *) ctx, file, NULL);
if (ret < 1)
return -1;
return 0;
}
__hidden int __ustream_ssl_set_crt_file(struct ustream_ssl_ctx *ctx, const char *file)
{
int ret;
ret = SSL_CTX_use_certificate_chain_file((void *) ctx, file);
if (ret < 1)
ret = SSL_CTX_use_certificate_file((void *) ctx, file, SSL_FILETYPE_ASN1);
if (ret < 1)
return -1;
return 0;
}
__hidden int __ustream_ssl_set_key_file(struct ustream_ssl_ctx *ctx, const char *file)
{
int ret;
ret = SSL_CTX_use_PrivateKey_file((void *) ctx, file, SSL_FILETYPE_PEM);
if (ret < 1)
ret = SSL_CTX_use_PrivateKey_file((void *) ctx, file, SSL_FILETYPE_ASN1);
if (ret < 1)
return -1;
return 0;
}
__hidden void __ustream_ssl_context_free(struct ustream_ssl_ctx *ctx)
{
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;
uloop_timeout_set(&us->error_timer, 0);
}
#ifndef CYASSL_OPENSSL_H_
static bool ustream_ssl_verify_cn(struct ustream_ssl *us, X509 *cert)
{
int ret;
if (!us->peer_cn)
return false;
ret = X509_check_host(cert, us->peer_cn, 0, X509_CHECK_FLAG_NO_PARTIAL_WILDCARDS, NULL);
return ret == 1;
}
static void ustream_ssl_verify_cert(struct ustream_ssl *us)
{
void *ssl = us->ssl;
X509 *cert;
int res;
res = SSL_get_verify_result(ssl);
if (res != X509_V_OK) {
if (us->notify_verify_error)
us->notify_verify_error(us, res, X509_verify_cert_error_string(res));
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
__hidden enum ssl_conn_status __ustream_ssl_connect(struct ustream_ssl *us)
{
void *ssl = us->ssl;
int r;
if (us->server)
r = SSL_accept(ssl);
else
r = SSL_connect(ssl);
if (r == 1) {
#ifndef CYASSL_OPENSSL_H_
ustream_ssl_verify_cert(us);
#endif
return U_SSL_OK;
}
r = SSL_get_error(ssl, r);
if (r == SSL_ERROR_WANT_READ || r == SSL_ERROR_WANT_WRITE)
return U_SSL_PENDING;
ustream_ssl_error(us, r);
return U_SSL_ERROR;
}
__hidden int __ustream_ssl_write(struct ustream_ssl *us, const char *buf, int len)
{
void *ssl = us->ssl;
int ret = SSL_write(ssl, buf, len);
if (ret < 0) {
int err = SSL_get_error(ssl, ret);
if (err == SSL_ERROR_WANT_WRITE)
return 0;
ustream_ssl_error(us, err);
return -1;
}
return ret;
}
__hidden int __ustream_ssl_read(struct ustream_ssl *us, char *buf, int len)
{
int ret = SSL_read(us->ssl, buf, len);
if (ret < 0) {
ret = SSL_get_error(us->ssl, ret);
if (ret == SSL_ERROR_WANT_READ)
return U_SSL_PENDING;
ustream_ssl_error(us, ret);
return U_SSL_ERROR;
}
return ret;
}
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