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/*
* libjingle
* Copyright 2004--2005, Google Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "talk/base/ssladapter.h"
#if !defined(SSL_USE_SCHANNEL) && !defined(SSL_USE_OPENSSL)
#ifdef WIN32
#define SSL_USE_SCHANNEL 1
#else // !WIN32
// Turn off OpenSSL
//#define SSL_USE_OPENSSL 1
#endif // !WIN32
#endif
#if SSL_USE_SCHANNEL
#include "schanneladapter.h"
namespace talk_base {
typedef SChannelAdapter DefaultSSLAdapter;
}
#endif // SSL_USE_SCHANNEL
#if SSL_USE_OPENSSL
#include <openssl/crypto.h>
#include <openssl/rand.h>
#include <openssl/ssl.h>
#include "openssladapter.h"
namespace talk_base {
typedef OpenSSLAdapter DefaultSSLAdapter;
}
#if defined(WIN32)
#define MUTEX_TYPE HANDLE
#define MUTEX_SETUP(x) (x) = CreateMutex(NULL, FALSE, NULL)
#define MUTEX_CLEANUP(x) CloseHandle(x)
#define MUTEX_LOCK(x) WaitForSingleObject((x), INFINITE)
#define MUTEX_UNLOCK(x) ReleaseMutex(x)
#define THREAD_ID GetCurrentThreadId()
#elif defined(_POSIX_THREADS)
// _POSIX_THREADS is normally defined in unistd.h if pthreads are available
// on your platform.
#define MUTEX_TYPE pthread_mutex_t
#define MUTEX_SETUP(x) pthread_mutex_init(&(x), NULL)
#define MUTEX_CLEANUP(x) pthread_mutex_destroy(&(x))
#define MUTEX_LOCK(x) pthread_mutex_lock(&(x))
#define MUTEX_UNLOCK(x) pthread_mutex_unlock(&(x))
#define THREAD_ID pthread_self()
#else
#error You must define mutex operations appropriate for your platform!
#endif
struct CRYPTO_dynlock_value {
MUTEX_TYPE mutex;
};
#endif // SSL_USE_OPENSSL
///////////////////////////////////////////////////////////////////////////////
namespace talk_base {
SSLAdapter*
SSLAdapter::Create(AsyncSocket* socket) {
#if SSL_USE_OPENSSL || SSL_USE_SCHANNEL
return new DefaultSSLAdapter(socket);
#else
return NULL;
#endif
}
///////////////////////////////////////////////////////////////////////////////
#if SSL_USE_OPENSSL
// This array will store all of the mutexes available to OpenSSL.
static MUTEX_TYPE* mutex_buf = NULL;
static void locking_function(int mode, int n, const char * file, int line) {
if (mode & CRYPTO_LOCK) {
MUTEX_LOCK(mutex_buf[n]);
} else {
MUTEX_UNLOCK(mutex_buf[n]);
}
}
static pthread_t id_function() {
return THREAD_ID;
}
static CRYPTO_dynlock_value* dyn_create_function(const char* file, int line) {
CRYPTO_dynlock_value* value = new CRYPTO_dynlock_value;
if (!value)
return NULL;
MUTEX_SETUP(value->mutex);
return value;
}
static void dyn_lock_function(int mode, CRYPTO_dynlock_value* l,
const char* file, int line) {
if (mode & CRYPTO_LOCK) {
MUTEX_LOCK(l->mutex);
} else {
MUTEX_UNLOCK(l->mutex);
}
}
static void dyn_destroy_function(CRYPTO_dynlock_value* l,
const char* file, int line) {
MUTEX_CLEANUP(l->mutex);
delete l;
}
bool InitializeSSL() {
if (!InitializeSSLThread() || !SSL_library_init())
return false;
SSL_load_error_strings();
ERR_load_BIO_strings();
OpenSSL_add_all_algorithms();
RAND_poll();
return true;
}
bool InitializeSSLThread() {
mutex_buf = new MUTEX_TYPE[CRYPTO_num_locks()];
if (!mutex_buf)
return false;
for (int i = 0; i < CRYPTO_num_locks(); ++i)
MUTEX_SETUP(mutex_buf[i]);
// we need to cast our id_function to return an unsigned long -- pthread_t is a pointer
CRYPTO_set_id_callback((unsigned long (*)())id_function);
CRYPTO_set_locking_callback(locking_function);
CRYPTO_set_dynlock_create_callback(dyn_create_function);
CRYPTO_set_dynlock_lock_callback(dyn_lock_function);
CRYPTO_set_dynlock_destroy_callback(dyn_destroy_function);
return true;
}
bool CleanupSSL() {
if (!mutex_buf)
return false;
CRYPTO_set_id_callback(NULL);
CRYPTO_set_locking_callback(NULL);
CRYPTO_set_dynlock_create_callback(NULL);
CRYPTO_set_dynlock_lock_callback(NULL);
CRYPTO_set_dynlock_destroy_callback(NULL);
for (int i = 0; i < CRYPTO_num_locks(); ++i)
MUTEX_CLEANUP(mutex_buf[i]);
delete [] mutex_buf;
mutex_buf = NULL;
return true;
}
#else // !SSL_USE_OPENSSL
bool InitializeSSL() {
return true;
}
bool InitializeSSLThread() {
return true;
}
bool CleanupSSL() {
return true;
}
#endif // !SSL_USE_OPENSSL
///////////////////////////////////////////////////////////////////////////////
} // namespace talk_base
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