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/*
Standard encryption plugin for Miranda NG
Copyright (C) 2012-16 George Hazan
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
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; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#define KEY_LENGTH 32
#define BLOCK_SIZE 16
struct CCrypt : public MICryptoEngine, public MZeroedObject
{
CCrypt();
~CCrypt();
BOOL m_valid;
CMStringA m_password;
BYTE m_key[KEY_LENGTH];
BYTE m_iv [KEY_LENGTH];
BYTE m_ctx[kCbc14ContextLen];
STDMETHODIMP_(void) destroy();
// get/set the instance key
STDMETHODIMP_(size_t) getKeyLength(void);
STDMETHODIMP_(bool) getKey(BYTE *pKey, size_t cbKeyLen);
STDMETHODIMP_(bool) setKey(const BYTE *pKey, size_t cbKeyLen);
STDMETHODIMP_(bool) generateKey(void); // creates a new key inside
STDMETHODIMP_(void) purgeKey(void); // purges a key from memory
// sets the master password (in utf-8)
STDMETHODIMP_(bool) checkPassword(const char *pszPassword);
STDMETHODIMP_(void) setPassword(const char *pszPassword);
// result must be freed using mir_free or assigned to mir_ptr<BYTE>
STDMETHODIMP_(BYTE*) encodeString(const char *src, size_t *cbResultLen);
STDMETHODIMP_(BYTE*) encodeBuffer(const void *src, size_t cbLen, size_t *cbResultLen);
// result must be freed using mir_free or assigned to ptrA/ptrT
STDMETHODIMP_(char*) decodeString(const BYTE *pBuf, size_t bufLen, size_t *cbResultLen);
STDMETHODIMP_(void*) decodeBuffer(const BYTE *pBuf, size_t bufLen, size_t *cbResultLen);
};
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