mirror of
https://github.com/OpenVPN/openvpn3.git
synced 2024-09-20 04:02:15 +02:00
b2cd82a5bf
Signed-off-by: James Yonan <james@openvpn.net>
211 lines
5.1 KiB
C++
211 lines
5.1 KiB
C++
// OpenVPN -- An application to securely tunnel IP networks
|
|
// over a single port, with support for SSL/TLS-based
|
|
// session authentication and key exchange,
|
|
// packet encryption, packet authentication, and
|
|
// packet compression.
|
|
//
|
|
// Copyright (C) 2012-2017 OpenVPN Technologies, Inc.
|
|
//
|
|
// This program is free software: you can redistribute it and/or modify
|
|
// it under the terms of the GNU General Public License Version 3
|
|
// as published by the Free Software Foundation.
|
|
//
|
|
// This program is distributed in the hope that it will be useful,
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
// GNU General Public License for more details.
|
|
//
|
|
// You should have received a copy of the GNU General Public License
|
|
// along with this program in the COPYING file.
|
|
// If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
// Crypto digest/HMAC API
|
|
|
|
#ifndef OPENVPN_CRYPTO_DIGESTAPI_H
|
|
#define OPENVPN_CRYPTO_DIGESTAPI_H
|
|
|
|
#include <openvpn/common/rc.hpp>
|
|
#include <openvpn/crypto/cryptoalgs.hpp>
|
|
|
|
namespace openvpn {
|
|
|
|
// Digest/HMAC abstract base classes and factories
|
|
|
|
class DigestInstance : public RC<thread_unsafe_refcount>
|
|
{
|
|
public:
|
|
typedef RCPtr<DigestInstance> Ptr;
|
|
|
|
virtual void update(const unsigned char *in, const size_t size) = 0;
|
|
virtual size_t final(unsigned char *out) = 0;
|
|
virtual size_t size() const = 0;
|
|
};
|
|
|
|
class HMACInstance : public RC<thread_unsafe_refcount>
|
|
{
|
|
public:
|
|
typedef RCPtr<HMACInstance> Ptr;
|
|
|
|
virtual void reset() = 0;
|
|
virtual void update(const unsigned char *in, const size_t size) = 0;
|
|
virtual size_t final(unsigned char *out) = 0;
|
|
virtual size_t size() const = 0;
|
|
};
|
|
|
|
class DigestContext : public RC<thread_unsafe_refcount>
|
|
{
|
|
public:
|
|
typedef RCPtr<DigestContext> Ptr;
|
|
|
|
virtual std::string name() const = 0;
|
|
virtual size_t size() const = 0;
|
|
|
|
virtual DigestInstance::Ptr new_digest() = 0;
|
|
|
|
virtual HMACInstance::Ptr new_hmac(const unsigned char *key,
|
|
const size_t key_size) = 0;
|
|
};
|
|
|
|
class DigestFactory : public RC<thread_unsafe_refcount>
|
|
{
|
|
public:
|
|
typedef RCPtr<DigestFactory> Ptr;
|
|
|
|
virtual DigestContext::Ptr new_context(const CryptoAlgs::Type digest_type) = 0;
|
|
|
|
virtual DigestInstance::Ptr new_digest(const CryptoAlgs::Type digest_type) = 0;
|
|
|
|
virtual HMACInstance::Ptr new_hmac(const CryptoAlgs::Type digest_type,
|
|
const unsigned char *key,
|
|
const size_t key_size) = 0;
|
|
};
|
|
|
|
// Digest implementation using CRYPTO_API
|
|
|
|
template <typename CRYPTO_API>
|
|
class CryptoDigestInstance : public DigestInstance
|
|
{
|
|
public:
|
|
CryptoDigestInstance(const CryptoAlgs::Type digest)
|
|
: impl(digest)
|
|
{
|
|
}
|
|
|
|
virtual void update(const unsigned char *in, const size_t size)
|
|
{
|
|
impl.update(in, size);
|
|
}
|
|
|
|
virtual size_t final(unsigned char *out)
|
|
{
|
|
return impl.final(out);
|
|
}
|
|
|
|
virtual size_t size() const
|
|
{
|
|
return impl.size();
|
|
}
|
|
|
|
private:
|
|
typename CRYPTO_API::DigestContext impl;
|
|
};
|
|
|
|
template <typename CRYPTO_API>
|
|
class CryptoHMACInstance : public HMACInstance
|
|
{
|
|
public:
|
|
CryptoHMACInstance(const CryptoAlgs::Type digest,
|
|
const unsigned char *key,
|
|
const size_t key_size)
|
|
: impl(digest, key, key_size)
|
|
{
|
|
}
|
|
|
|
virtual void reset()
|
|
{
|
|
impl.reset();
|
|
}
|
|
|
|
virtual void update(const unsigned char *in, const size_t size)
|
|
{
|
|
impl.update(in, size);
|
|
}
|
|
|
|
virtual size_t final(unsigned char *out)
|
|
{
|
|
return impl.final(out);
|
|
}
|
|
|
|
size_t size() const
|
|
{
|
|
return impl.size();
|
|
}
|
|
|
|
private:
|
|
typename CRYPTO_API::HMACContext impl;
|
|
};
|
|
|
|
template <typename CRYPTO_API>
|
|
class CryptoDigestContext : public DigestContext
|
|
{
|
|
public:
|
|
CryptoDigestContext(const CryptoAlgs::Type digest_type)
|
|
: digest(digest_type)
|
|
{
|
|
}
|
|
|
|
virtual std::string name() const
|
|
{
|
|
return CryptoAlgs::name(digest);
|
|
}
|
|
|
|
virtual size_t size() const
|
|
{
|
|
return CryptoAlgs::size(digest);
|
|
}
|
|
|
|
virtual DigestInstance::Ptr new_digest()
|
|
{
|
|
return new CryptoDigestInstance<CRYPTO_API>(digest);
|
|
}
|
|
|
|
virtual HMACInstance::Ptr new_hmac(const unsigned char *key,
|
|
const size_t key_size)
|
|
{
|
|
return new CryptoHMACInstance<CRYPTO_API>(digest,
|
|
key,
|
|
key_size);
|
|
}
|
|
|
|
private:
|
|
CryptoAlgs::Type digest;
|
|
};
|
|
|
|
template <typename CRYPTO_API>
|
|
class CryptoDigestFactory : public DigestFactory
|
|
{
|
|
public:
|
|
virtual DigestContext::Ptr new_context(const CryptoAlgs::Type digest_type)
|
|
{
|
|
return new CryptoDigestContext<CRYPTO_API>(digest_type);
|
|
}
|
|
|
|
virtual DigestInstance::Ptr new_digest(const CryptoAlgs::Type digest_type)
|
|
{
|
|
return new CryptoDigestInstance<CRYPTO_API>(digest_type);
|
|
}
|
|
|
|
virtual HMACInstance::Ptr new_hmac(const CryptoAlgs::Type digest_type,
|
|
const unsigned char *key,
|
|
const size_t key_size)
|
|
{
|
|
return new CryptoHMACInstance<CRYPTO_API>(digest_type,
|
|
key,
|
|
key_size);
|
|
}
|
|
};
|
|
|
|
}
|
|
|
|
#endif
|