www.pudn.com > truecrypt.zip > CRYPTO.C

/* Copyright (C) 2004 TrueCrypt Team, truecrypt.org 
   This product uses components written by Paul Le Roux  */ 
 
#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"; 
	} 
}