crypto.c

加密硬盘、分区、虚拟盘的程序源码

/* Copyright (C) 2004 TrueCrypt Team, truecrypt.org
   This product uses components written by Paul Le Roux <[e-mail]> */

#include "TCdefs.h"
#include "crypto.h"
#include "random.h"

PCRYPTO_INFO
crypto_open ()
{
	/* Do the crt allocation */
	PCRYPTO_INFO cryptoInfo = TCalloc (sizeof (CRYPTO_INFO));
	if (cryptoInfo == NULL)
		return NULL;

	cryptoInfo->cipher = -1;
	return cryptoInfo;
}

void
crypto_loadkey (PKEY_INFO keyInfo, char *lpszUserKey, int nUserKeyLen)
{
	keyInfo->keyLength = nUserKeyLen;
	burn (keyInfo->userKey, sizeof (keyInfo->userKey));
	memcpy (keyInfo->userKey, lpszUserKey, nUserKeyLen);
}

void
crypto_close (PCRYPTO_INFO cryptoInfo)
{
	burn (cryptoInfo, sizeof (CRYPTO_INFO));
	TCfree (cryptoInfo);
}

int
get_block_size (int cipher)
{
	if (cipher);		/* remove warning */
	return 8;
}

int
get_key_size (int cipher)
{
	if (cipher == DES56)
		return 7;
	else if (cipher == IDEA)
		return 16;
	else if (cipher == BLOWFISH)
		return 56;
	else if (cipher == TRIPLEDES)
		return 21;
	else if (cipher == CAST)
		return 16;
	else
	{
		return 0;
	}
}

char *
get_cipher_name (int cipher)
{
	if (cipher == BLOWFISH)
		return "Blowfish";
	else if (cipher == IDEA)
		return "IDEA";
	else if (cipher == DES56)
		return "DES";
	else if (cipher == TRIPLEDES)
		return "Triple-DES";
	else if (cipher == CAST)
		return "CAST";
	else if (cipher == NONE)
		return "None";
	else
		return "Unknown";
}

char * get_hash_name (int pkcs5)
{
	switch (pkcs5)
	{
	case SHA1:		return "HMAC-SHA-1";
	case RIPEMD160:	return "HMAC-RIPEMD-160";
	default:		return "Unknown";
	}
}