VeraCrypt
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path: root/src/Common/Dictionary.c
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/*
 Derived from source code of TrueCrypt 7.1a, which is
 Copyright (c) 2008-2012 TrueCrypt Developers Association and which is governed
 by the TrueCrypt License 3.0.

 Modifications and additions to the original source code (contained in this file) 
 and all other portions of this file are Copyright (c) 2013-2016 IDRIX
 and are governed by the Apache License 2.0 the full text of which is
 contained in the file License.txt included in VeraCrypt binary and source
 code distribution packages.
*/

#include "../Common/Dictionary.h"
#include <windows.h>
#include <map>
#include <string>

using namespace std;

static map <string, void *> StringKeyMap;
static map <int, void *> IntKeyMap;

static void *DataPool = NULL;
static size_t DataPoolSize = 0;


void AddDictionaryEntry (char *key, int intKey, void *value)
{
	try
	{
		if (key)
			StringKeyMap[key] = value;

		if (intKey != 0)
			IntKeyMap[intKey] = value;
	}
	catch (exception&) {}
}


void *GetDictionaryValue (const char *key)
{
	map <string, void *>::const_iterator i = StringKeyMap.find (key);
	
	if (i == StringKeyMap.end())
		return NULL;

	return i->second;
}


void *GetDictionaryValueByInt (int intKey)
{
	map <int, void *>::const_iterator i = IntKeyMap.find (intKey);

	if (i == IntKeyMap.end())
		return NULL;

	return i->second;
}


void *AddPoolData (void *data, size_t dataSize)
{
	if (DataPoolSize + dataSize > DATA_POOL_CAPACITY) return NULL;

	if (DataPool == NULL)
	{
		DataPool = malloc (DATA_POOL_CAPACITY);
		if (DataPool == NULL) return NULL;
	}

	memcpy ((BYTE *)DataPool + DataPoolSize, data, dataSize);

	// Ensure 32-bit alignment for next entries
	dataSize = (dataSize + 3) & (~(size_t)3);

	DataPoolSize += dataSize;
	return (BYTE *)DataPool + DataPoolSize - dataSize;
}


void ClearDictionaryPool ()
{
	DataPoolSize = 0;
	StringKeyMap.clear();
	IntKeyMap.clear();
}
if #if defined( AES_ENC_PREKEYED ) return_type aes_encrypt( const unsigned char in[N_BLOCK], unsigned char out[N_BLOCK], const aes_context ctx[1] ); #endif #if defined( AES_DEC_PREKEYED ) return_type aes_decrypt( const unsigned char in[N_BLOCK], unsigned char out[N_BLOCK], const aes_context ctx[1] ); #endif /* The following calls are for 'on the fly' keying. In this case the encryption and decryption keys are different. The encryption subroutines take a key in an array of bytes in key[L] where L is 16, 24 or 32 bytes for key lengths of 128, 192, and 256 bits respectively. They then encrypts the input data, in[] with this key and put the reult in the output array out[]. In addition, the second key array, o_key[L], is used to output the key that is needed by the decryption subroutine to reverse the encryption operation. The two key arrays can be the same array but in this case the original key will be overwritten. In the same way, the decryption subroutines output keys that can be used to reverse their effect when used for encryption. Only 128 and 256 bit keys are supported in these 'on the fly' modes. */ #if defined( AES_ENC_128_OTFK ) void aes_encrypt_128( const unsigned char in[N_BLOCK], unsigned char out[N_BLOCK], const unsigned char key[N_BLOCK], uint_8t o_key[N_BLOCK] ); #endif #if defined( AES_DEC_128_OTFK ) void aes_decrypt_128( const unsigned char in[N_BLOCK], unsigned char out[N_BLOCK], const unsigned char key[N_BLOCK], unsigned char o_key[N_BLOCK] ); #endif #if defined( AES_ENC_256_OTFK ) void aes_encrypt_256( const unsigned char in[N_BLOCK], unsigned char out[N_BLOCK], const unsigned char key[2 * N_BLOCK], unsigned char o_key[2 * N_BLOCK] ); #endif #if defined( AES_DEC_256_OTFK ) void aes_decrypt_256( const unsigned char in[N_BLOCK], unsigned char out[N_BLOCK], const unsigned char key[2 * N_BLOCK], unsigned char o_key[2 * N_BLOCK] ); #endif #if defined(__cplusplus) } #endif #endif