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/*
* libjingle
* Copyright 2004--2008, Google Inc.
* Copyright 2011, RTFM, 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.
*/
#ifndef TALK_BASE_NSSSTREAMADAPTER_H_
#define TALK_BASE_NSSSTREAMADAPTER_H_
#include <string>
#include <vector>
#include "nspr.h"
#include "nss.h"
#include "secmodt.h"
#include "talk/base/buffer.h"
#include "talk/base/nssidentity.h"
#include "talk/base/ssladapter.h"
#include "talk/base/sslstreamadapter.h"
#include "talk/base/sslstreamadapterhelper.h"
namespace talk_base {
// Singleton
class NSSContext {
public:
NSSContext() {}
~NSSContext() {
}
static PK11SlotInfo *GetSlot() {
return Instance() ? Instance()->slot_: NULL;
}
static NSSContext *Instance();
static bool InitializeSSL(VerificationCallback callback);
static bool InitializeSSLThread();
static bool CleanupSSL();
private:
PK11SlotInfo *slot_; // The PKCS-11 slot
static bool initialized; // Was this initialized?
static NSSContext *global_nss_context; // The global context
};
class NSSStreamAdapter : public SSLStreamAdapterHelper {
public:
explicit NSSStreamAdapter(StreamInterface* stream);
virtual ~NSSStreamAdapter();
bool Init();
virtual StreamResult Read(void* data, size_t data_len,
size_t* read, int* error);
virtual StreamResult Write(const void* data, size_t data_len,
size_t* written, int* error);
void OnMessage(Message *msg);
// Key Extractor interface
virtual bool ExportKeyingMaterial(const std::string& label,
const uint8* context,
size_t context_len,
bool use_context,
uint8* result,
size_t result_len);
// DTLS-SRTP interface
virtual bool SetDtlsSrtpCiphers(const std::vector<std::string>& ciphers);
virtual bool GetDtlsSrtpCipher(std::string* cipher);
// Capabilities interfaces
static bool HaveDtls();
static bool HaveDtlsSrtp();
static bool HaveExporter();
protected:
// Override SSLStreamAdapter
virtual void OnEvent(StreamInterface* stream, int events, int err);
// Override SSLStreamAdapterHelper
virtual int BeginSSL();
virtual void Cleanup();
virtual bool GetDigestLength(const std::string &algorithm,
std::size_t *length) {
return NSSCertificate::GetDigestLength(algorithm, length);
}
private:
int ContinueSSL();
static SECStatus AuthCertificateHook(void *arg, PRFileDesc *fd,
PRBool checksig, PRBool isServer);
static SECStatus GetClientAuthDataHook(void *arg, PRFileDesc *fd,
CERTDistNames *caNames,
CERTCertificate **pRetCert,
SECKEYPrivateKey **pRetKey);
PRFileDesc *ssl_fd_; // NSS's SSL file descriptor
static bool initialized; // Was InitializeSSL() called?
bool cert_ok_; // Did we get and check a cert
std::vector<PRUint16> srtp_ciphers_; // SRTP cipher list
static PRDescIdentity nspr_layer_identity; // The NSPR layer identity
};
} // namespace talk_base
#endif // TALK_BASE_NSSSTREAMADAPTER_H_
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