130 lines
4 KiB
C++
130 lines
4 KiB
C++
/*
|
|
* Copyright (c) 2010-2011 Juli Mallett. All rights reserved.
|
|
*
|
|
* 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.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``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 AUTHOR OR CONTRIBUTORS 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 <openssl/evp.h>
|
|
#include <openssl/rand.h>
|
|
|
|
#include <common/factory.h>
|
|
#include <crypto/crypto_random.h>
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
// //
|
|
// File: crypto_random_openssl.cc //
|
|
// Description: interface to the OpenSSL encryption functions //
|
|
// Project: WANProxy XTech //
|
|
// Adapted by: Andreu Vidal Bramfeld-Software //
|
|
// Last modified: 2015-04-01 //
|
|
// //
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
namespace {
|
|
typedef int (RAND_func)(unsigned char *, int);
|
|
}
|
|
|
|
class CryptoRandomSessionRAND : public CryptoRandomSession {
|
|
LogHandle log_;
|
|
RAND_func *func_;
|
|
public:
|
|
CryptoRandomSessionRAND(RAND_func *func)
|
|
: log_("/crypto/random/session/openssl"),
|
|
func_(func)
|
|
{ }
|
|
|
|
~CryptoRandomSessionRAND()
|
|
{ }
|
|
|
|
/*
|
|
Action *generate(size_t len, EventCallback *cb)
|
|
{
|
|
ASSERT(log_, len != 0);
|
|
|
|
uint8_t bytes[len];
|
|
int rv = func_(bytes, sizeof bytes);
|
|
if (rv == 0) {
|
|
cb->param(Event::Error);
|
|
return (cb->schedule());
|
|
}
|
|
cb->param(Event(Event::Done, Buffer(bytes, sizeof bytes)));
|
|
return (cb->schedule());
|
|
}
|
|
*/
|
|
};
|
|
|
|
class CryptoRandomMethodOpenSSL : public CryptoRandomMethod {
|
|
LogHandle log_;
|
|
std::map<CryptoRandomType, RAND_func *> func_map_;
|
|
public:
|
|
CryptoRandomMethodOpenSSL(void)
|
|
: log_("/crypto/random/openssl"),
|
|
func_map_()
|
|
{
|
|
OpenSSL_add_all_algorithms();
|
|
|
|
func_map_[CryptoTypeRNG] = RAND_bytes;
|
|
func_map_[CryptoTypePRNG] = RAND_pseudo_bytes;
|
|
|
|
/* XXX Register. */
|
|
}
|
|
|
|
~CryptoRandomMethodOpenSSL()
|
|
{
|
|
/* XXX Unregister. */
|
|
}
|
|
|
|
/*
|
|
* Synchronous randomness generation. May not succeed.
|
|
*/
|
|
bool generate(CryptoRandomType func, size_t len, Buffer *out) const
|
|
{
|
|
std::map<CryptoRandomType, RAND_func *>::const_iterator it;
|
|
|
|
it = func_map_.find(func);
|
|
if (it == func_map_.end())
|
|
return (false);
|
|
|
|
uint8_t bytes[len];
|
|
int rv = it->second(bytes, sizeof bytes);
|
|
if (rv == 0)
|
|
return (false);
|
|
|
|
out->append(bytes, sizeof bytes);
|
|
return (true);
|
|
}
|
|
|
|
CryptoRandomSession *session(CryptoRandomType func) const
|
|
{
|
|
std::map<CryptoRandomType, RAND_func *>::const_iterator it;
|
|
|
|
it = func_map_.find(func);
|
|
if (it != func_map_.end())
|
|
return (new CryptoRandomSessionRAND(it->second));
|
|
return (NULL);
|
|
}
|
|
};
|
|
|
|
namespace {
|
|
static CryptoRandomMethodOpenSSL crypto_random_method_openssl;
|
|
}
|
|
const CryptoRandomMethod *CryptoRandomMethod::default_method = &crypto_random_method_openssl; /* XXX */
|