diff options
Diffstat (limited to 'plugins/Kuzne4ikCrypt/src/encrypt.cpp')
| -rw-r--r-- | plugins/Kuzne4ikCrypt/src/encrypt.cpp | 242 |
1 files changed, 0 insertions, 242 deletions
diff --git a/plugins/Kuzne4ikCrypt/src/encrypt.cpp b/plugins/Kuzne4ikCrypt/src/encrypt.cpp deleted file mode 100644 index bcb68eac53..0000000000 --- a/plugins/Kuzne4ikCrypt/src/encrypt.cpp +++ /dev/null @@ -1,242 +0,0 @@ -/*
-
-Miranda NG: the free IM client for Microsoft* Windows*
-
-Copyright (C) 2012-17 Miranda NG project,
-all portions of this codebase are copyrighted to the people
-listed in contributors.txt.
-
-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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
-*/
-
-#include "stdafx.h"
-
-#include "../../../libs/zlib/src/zlib.h"
-
-const BYTE iv0[] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
-
-struct ExternalKey
-{
- BYTE m_key[KEY_LENGTH];
- BYTE m_iv[KEY_LENGTH];
- DWORD m_crc32;
- BYTE slack[BLOCK_SIZE - sizeof(DWORD)];
-};
-
-CCrypt::CCrypt() :
- m_password("Miranda")
-{}
-
-CCrypt::~CCrypt()
-{
- if (m_valid)
- {
- free_ecb(m_ctx);
- getRandomBytes(m_key, KEY_LENGTH);
- }
-}
-
-void CCrypt::destroy()
-{
- delete this;
-}
-
-size_t CCrypt::getKeyLength()
-{
- return sizeof(ExternalKey);
-}
-
-bool CCrypt::getKey(BYTE *pKey, size_t cbKeyLen)
-{
- if (!m_valid || cbKeyLen < sizeof(ExternalKey))
- return false;
-
- ExternalKey tmp = { 0 };
- memcpy(&tmp.m_key, m_key, KEY_LENGTH);
- memcpy(&tmp.m_iv, m_iv, KEY_LENGTH);
- tmp.m_crc32 = crc32(0xAbbaDead, (LPCBYTE)m_password.GetString(), m_password.GetLength());
- getRandomBytes(tmp.slack, sizeof(tmp.slack));
-
- BYTE tmpHash[32];
- slow_hash(m_password, m_password.GetLength(), tmpHash);
-
- BYTE ctx[kCbc14ContextLen];
- init_cbc_14(tmpHash, ctx, iv0, _countof(iv0));
- bool val = !encrypt_cbc(ctx, (BYTE*)&tmp, pKey, cbKeyLen);
- free_cbc(ctx);
-
- return val;
-}
-
-bool CCrypt::setKey(const BYTE *pKey, size_t cbKeyLen)
-{
- // full external key. decode & check password
- if (cbKeyLen != sizeof(ExternalKey))
- return false;
-
- BYTE tmpHash[32];
- slow_hash(m_password, m_password.GetLength(), tmpHash);
-
-
- BYTE ctx[kCbc14ContextLen];
- init_cbc_14(tmpHash, ctx, iv0, _countof(iv0));
-
- ExternalKey tmp = { 0 };
-
- decrypt_cbc(ctx, (BYTE*)pKey, (BYTE*)&tmp, sizeof(tmp));
-
- free_cbc(ctx);
-
- if (tmp.m_crc32 != crc32(0xAbbaDead, (LPCBYTE)m_password.GetString(), m_password.GetLength()))
- return false;
-
- memcpy(m_key, &tmp.m_key, KEY_LENGTH);
- memcpy(m_iv, &tmp.m_iv, KEY_LENGTH);
- init_cbc_14(m_key, m_ctx, m_iv, KEY_LENGTH);
-
- return m_valid = true;
-}
-
-bool CCrypt::generateKey(void)
-{
- BYTE tmp[KEY_LENGTH], tmpiv[KEY_LENGTH];
- if (!getRandomBytes(tmp, sizeof(tmp)) || !getRandomBytes(tmpiv, sizeof(tmpiv)))
- return false;
-
- memcpy(m_key, tmp, KEY_LENGTH);
- memcpy(m_iv, tmpiv, KEY_LENGTH);
- init_cbc_14(m_key, m_ctx, m_iv, _countof(m_iv));
-
- SecureZeroMemory(tmp, _countof(tmp)); SecureZeroMemory(tmpiv, _countof(tmpiv));
-
- return m_valid = true;
-}
-
-void CCrypt::purgeKey(void)
-{
- memset(m_key, 0, sizeof(m_key));
- m_valid = false;
-}
-
-// checks the master password (in utf-8)
-bool CCrypt::checkPassword(const char *pszPassword)
-{
- return m_password == pszPassword;
-}
-
-// sets the master password (in utf-8)
-void CCrypt::setPassword(const char *pszPassword)
-{
- m_password = (pszPassword == NULL) ? "Miranda" : pszPassword;
-}
-
-// result must be freed using mir_free or assigned to mir_ptr<BYTE>
-BYTE* CCrypt::encodeString(const char *src, size_t *cbResultLen)
-{
- if (!m_valid || src == NULL) {
- if (cbResultLen)
- *cbResultLen = 0;
- return NULL;
- }
-
- return encodeBuffer(src, mir_strlen(src)+1, cbResultLen);
-}
-
-BYTE* CCrypt::encodeBuffer(const void *src, size_t cbLen, size_t *cbResultLen)
-{
- if (cbResultLen)
- *cbResultLen = 0;
-
- if (!m_valid || src == NULL || cbLen >= 0xFFFE)
- return NULL;
-
- BYTE *tmpBuf = (BYTE*)_alloca(cbLen + 2);
- *(PWORD)tmpBuf = (WORD)cbLen;
- memcpy(tmpBuf + 2, src, cbLen);
- cbLen += 2;
- size_t rest = cbLen % BLOCK_SIZE;
- if (rest)
- cbLen += BLOCK_SIZE - rest;
-
- BYTE *result = (BYTE*)mir_alloc(cbLen);
-
- if (encrypt_cbc(m_ctx, tmpBuf, result, cbLen)) {
- mir_free(result);
- return NULL;
- }
-
- if (cbResultLen)
- *cbResultLen = cbLen;
- return result;
-}
-
-char* CCrypt::decodeString(const BYTE *pBuf, size_t bufLen, size_t *cbResultLen)
-{
- size_t resLen;
- char *result = (char*)decodeBuffer(pBuf, bufLen, &resLen);
- if (result) {
- if (result[resLen-1] != 0) { // smth went wrong
- mir_free(result);
- return NULL;
- }
- }
-
- if (cbResultLen)
- *cbResultLen = resLen;
- return result;
-}
-
-void* CCrypt::decodeBuffer(const BYTE *pBuf, size_t bufLen, size_t *cbResultLen)
-{
- if (cbResultLen)
- *cbResultLen = 0;
-
- if (!m_valid || pBuf == NULL || (bufLen % BLOCK_SIZE) != 0)
- return NULL;
-
- char *result = (char*)mir_alloc(bufLen + 1);
-
- if (decrypt_cbc(m_ctx, LPBYTE(pBuf), (BYTE*)result, bufLen)) {
- mir_free(result);
- return NULL;
- }
-
- result[bufLen] = 0;
- WORD cbLen = *(PWORD)result;
- if (cbLen > bufLen) {
- mir_free(result);
- return NULL;
- }
-
- memmove(result, result + 2, cbLen);
- if (cbResultLen)
- *cbResultLen = cbLen;
- return result;
-}
-
-static MICryptoEngine* __cdecl builder()
-{
- return new CCrypt();
-}
-
-int LoadEncryptionModule(void)
-{
- CRYPTO_PROVIDER cp = { sizeof(cp) };
- cp.pszName = "Kuznechik";
- cp.pszDescr = LPGEN("Kuznechik (GOST P 34.12-2015) crypto provider");
- cp.pFactory = builder;
- Crypto_RegisterEngine(&cp);
- return 0;
-}
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