📄 lib_rc4.c
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/****************************************************************************
* *
* cryptlib RC4 Encryption Routines *
* Copyright Peter Gutmann 1994-2003 *
* *
****************************************************************************/
#include <stdlib.h>
#if defined( INC_ALL )
#include "crypt.h"
#include "rc4.h"
#include "context.h"
#include "libs.h"
#elif defined( INC_CHILD )
#include "../crypt.h"
#include "../crypt/rc4.h"
#include "../misc/context.h"
#include "libs.h"
#else
#include "crypt.h"
#include "crypt/rc4.h"
#include "misc/context.h"
#include "libs/libs.h"
#endif /* Compiler-specific includes */
#ifdef USE_RC4
/* The size of the expanded RC4 keys */
#define RC4_EXPANDED_KEYSIZE sizeof( RC4_KEY )
/****************************************************************************
* *
* RC4 Self-test Routines *
* *
****************************************************************************/
/* RC4 test vectors from the BSAFE implementation */
static const FAR_BSS BYTE testRC4key1[] =
{ 0x01, 0x23, 0x45, 0x67, 0x89, 0xAB, 0xCD, 0xEF };
static const FAR_BSS BYTE testRC4plaintext1[] =
{ 0x01, 0x23, 0x45, 0x67, 0x89, 0xAB, 0xCD, 0xEF };
static const FAR_BSS BYTE testRC4ciphertext1[] =
{ 0x75, 0xB7, 0x87, 0x80, 0x99, 0xE0, 0xC5, 0x96 };
static const FAR_BSS BYTE testRC4key2[] =
{ 0x01, 0x23, 0x45, 0x67, 0x89, 0xAB, 0xCD, 0xEF };
static const FAR_BSS BYTE testRC4plaintext2[] =
{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
static const FAR_BSS BYTE testRC4ciphertext2[] =
{ 0x74, 0x94, 0xC2, 0xE7, 0x10, 0x4B, 0x08, 0x79 };
static const FAR_BSS BYTE testRC4key3[] =
{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
static const FAR_BSS BYTE testRC4plaintext3[] =
{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
static const FAR_BSS BYTE testRC4ciphertext3[] =
{ 0xDE, 0x18, 0x89, 0x41, 0xA3, 0x37, 0x5D, 0x3A };
static const FAR_BSS BYTE testRC4key4[] =
{ 0xEF, 0x01, 0x23, 0x45 };
static const FAR_BSS BYTE testRC4plaintext4[] =
{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
static const FAR_BSS BYTE testRC4ciphertext4[] =
{ 0xD6, 0xA1, 0x41, 0xA7, 0xEC, 0x3C, 0x38, 0xDF, 0xBD, 0x61 };
static const FAR_BSS BYTE testRC4key5[] =
{ 0x01, 0x23, 0x45, 0x67, 0x89, 0xAB, 0xCD, 0xEF };
static const FAR_BSS BYTE testRC4plaintext5[] =
{ 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01 };
static const FAR_BSS BYTE testRC4ciphertext5[] =
{ 0x75, 0x95, 0xC3, 0xE6, 0x11, 0x4A, 0x09, 0x78,
0x0C, 0x4A, 0xD4, 0x52, 0x33, 0x8E, 0x1F, 0xFD,
0x9A, 0x1B, 0xE9, 0x49, 0x8F, 0x81, 0x3D, 0x76,
0x53, 0x34, 0x49, 0xB6, 0x77, 0x8D, 0xCA, 0xD8,
0xC7, 0x8A, 0x8D, 0x2B, 0xA9, 0xAC, 0x66, 0x08,
0x5D, 0x0E, 0x53, 0xD5, 0x9C, 0x26, 0xC2, 0xD1,
0xC4, 0x90, 0xC1, 0xEB, 0xBE, 0x0C, 0xE6, 0x6D,
0x1B, 0x6B, 0x1B, 0x13, 0xB6, 0xB9, 0x19, 0xB8,
0x47, 0xC2, 0x5A, 0x91, 0x44, 0x7A, 0x95, 0xE7,
0x5E, 0x4E, 0xF1, 0x67, 0x79, 0xCD, 0xE8, 0xBF,
0x0A, 0x95, 0x85, 0x0E, 0x32, 0xAF, 0x96, 0x89,
0x44, 0x4F, 0xD3, 0x77, 0x10, 0x8F, 0x98, 0xFD,
0xCB, 0xD4, 0xE7, 0x26, 0x56, 0x75, 0x00, 0x99,
0x0B, 0xCC, 0x7E, 0x0C, 0xA3, 0xC4, 0xAA, 0xA3,
0x04, 0xA3, 0x87, 0xD2, 0x0F, 0x3B, 0x8F, 0xBB,
0xCD, 0x42, 0xA1, 0xBD, 0x31, 0x1D, 0x7A, 0x43,
0x03, 0xDD, 0xA5, 0xAB, 0x07, 0x88, 0x96, 0xAE,
0x80, 0xC1, 0x8B, 0x0A, 0xF6, 0x6D, 0xFF, 0x31,
0x96, 0x16, 0xEB, 0x78, 0x4E, 0x49, 0x5A, 0xD2,
0xCE, 0x90, 0xD7, 0xF7, 0x72, 0xA8, 0x17, 0x47,
0xB6, 0x5F, 0x62, 0x09, 0x3B, 0x1E, 0x0D, 0xB9,
0xE5, 0xBA, 0x53, 0x2F, 0xAF, 0xEC, 0x47, 0x50,
0x83, 0x23, 0xE6, 0x71, 0x32, 0x7D, 0xF9, 0x44,
0x44, 0x32, 0xCB, 0x73, 0x67, 0xCE, 0xC8, 0x2F,
0x5D, 0x44, 0xC0, 0xD0, 0x0B, 0x67, 0xD6, 0x50,
0xA0, 0x75, 0xCD, 0x4B, 0x70, 0xDE, 0xDD, 0x77,
0xEB, 0x9B, 0x10, 0x23, 0x1B, 0x6B, 0x5B, 0x74,
0x13, 0x47, 0x39, 0x6D, 0x62, 0x89, 0x74, 0x21,
0xD4, 0x3D, 0xF9, 0xB4, 0x2E, 0x44, 0x6E, 0x35,
0x8E, 0x9C, 0x11, 0xA9, 0xB2, 0x18, 0x4E, 0xCB,
0xEF, 0x0C, 0xD8, 0xE7, 0xA8, 0x77, 0xEF, 0x96,
0x8F, 0x13, 0x90, 0xEC, 0x9B, 0x3D, 0x35, 0xA5,
0x58, 0x5C, 0xB0, 0x09, 0x29, 0x0E, 0x2F, 0xCD,
0xE7, 0xB5, 0xEC, 0x66, 0xD9, 0x08, 0x4B, 0xE4,
0x40, 0x55, 0xA6, 0x19, 0xD9, 0xDD, 0x7F, 0xC3,
0x16, 0x6F, 0x94, 0x87, 0xF7, 0xCB, 0x27, 0x29,
0x12, 0x42, 0x64, 0x45, 0x99, 0x85, 0x14, 0xC1,
0x5D, 0x53, 0xA1, 0x8C, 0x86, 0x4C, 0xE3, 0xA2,
0xB7, 0x55, 0x57, 0x93, 0x98, 0x81, 0x26, 0x52,
0x0E, 0xAC, 0xF2, 0xE3, 0x06, 0x6E, 0x23, 0x0C,
0x91, 0xBE, 0xE4, 0xDD, 0x53, 0x04, 0xF5, 0xFD,
0x04, 0x05, 0xB3, 0x5B, 0xD9, 0x9C, 0x73, 0x13,
0x5D, 0x3D, 0x9B, 0xC3, 0x35, 0xEE, 0x04, 0x9E,
0xF6, 0x9B, 0x38, 0x67, 0xBF, 0x2D, 0x7B, 0xD1,
0xEA, 0xA5, 0x95, 0xD8, 0xBF, 0xC0, 0x06, 0x6F,
0xF8, 0xD3, 0x15, 0x09, 0xEB, 0x0C, 0x6C, 0xAA,
0x00, 0x6C, 0x80, 0x7A, 0x62, 0x3E, 0xF8, 0x4C,
0x3D, 0x33, 0xC1, 0x95, 0xD2, 0x3E, 0xE3, 0x20,
0xC4, 0x0D, 0xE0, 0x55, 0x81, 0x57, 0xC8, 0x22,
0xD4, 0xB8, 0xC5, 0x69, 0xD8, 0x49, 0xAE, 0xD5,
0x9D, 0x4E, 0x0F, 0xD7, 0xF3, 0x79, 0x58, 0x6B,
0x4B, 0x7F, 0xF6, 0x84, 0xED, 0x6A, 0x18, 0x9F,
0x74, 0x86, 0xD4, 0x9B, 0x9C, 0x4B, 0xAD, 0x9B,
0xA2, 0x4B, 0x96, 0xAB, 0xF9, 0x24, 0x37, 0x2C,
0x8A, 0x8F, 0xFF, 0xB1, 0x0D, 0x55, 0x35, 0x49,
0x00, 0xA7, 0x7A, 0x3D, 0xB5, 0xF2, 0x05, 0xE1,
0xB9, 0x9F, 0xCD, 0x86, 0x60, 0x86, 0x3A, 0x15,
0x9A, 0xD4, 0xAB, 0xE4, 0x0F, 0xA4, 0x89, 0x34,
0x16, 0x3D, 0xDD, 0xE5, 0x42, 0xA6, 0x58, 0x55,
0x40, 0xFD, 0x68, 0x3C, 0xBF, 0xD8, 0xC0, 0x0F,
0x12, 0x12, 0x9A, 0x28, 0x4D, 0xEA, 0xCC, 0x4C,
0xDE, 0xFE, 0x58, 0xBE, 0x71, 0x37, 0x54, 0x1C,
0x04, 0x71, 0x26, 0xC8, 0xD4, 0x9E, 0x27, 0x55,
0xAB, 0x18, 0x1A, 0xB7, 0xE9, 0x40, 0xB0, 0xC0 };
/* Test vector from the State/Commerce Department */
static const FAR_BSS BYTE testRC4key6[] =
{ 0x61, 0x8A, 0x63, 0xD2, 0xFB };
static const FAR_BSS BYTE testRC4plaintext6[] =
{ 0xDC, 0xEE, 0x4C, 0xF9, 0x2C };
static const FAR_BSS BYTE testRC4ciphertext6[] =
{ 0xF1, 0x38, 0x29, 0xC9, 0xDE };
/* Test the RC4 code against the test vectors from the BSAFE implementation */
static int rc4Test( const BYTE *key, const int keySize,
const BYTE *plaintext, const BYTE *ciphertext,
const int length )
{
BYTE temp[ 512 ];
RC4_KEY rc4key;
memcpy( temp, plaintext, length );
RC4_set_key( &rc4key, keySize, ( BYTE * ) key );
RC4( &rc4key, length, temp, temp );
if( memcmp( ciphertext, temp, length ) )
return( CRYPT_ERROR );
return( CRYPT_OK );
}
int rc4SelfTest( void )
{
/* The testing gets somewhat messy here because of the variable-length
arrays, which isn't normally a problem with the fixed-length keys
and data used in the block ciphers */
if( rc4Test( testRC4key1, sizeof( testRC4key1 ), testRC4plaintext1,
testRC4ciphertext1, sizeof( testRC4plaintext1 ) ) != CRYPT_OK ||
rc4Test( testRC4key2, sizeof( testRC4key2 ), testRC4plaintext2,
testRC4ciphertext2, sizeof( testRC4plaintext2 ) ) != CRYPT_OK ||
rc4Test( testRC4key3, sizeof( testRC4key3 ), testRC4plaintext3,
testRC4ciphertext3, sizeof( testRC4plaintext3 ) ) != CRYPT_OK ||
rc4Test( testRC4key4, sizeof( testRC4key4 ), testRC4plaintext4,
testRC4ciphertext4, sizeof( testRC4plaintext4 ) ) != CRYPT_OK ||
rc4Test( testRC4key5, sizeof( testRC4key5 ), testRC4plaintext5,
testRC4ciphertext5, sizeof( testRC4plaintext5 ) ) != CRYPT_OK ||
rc4Test( testRC4key6, sizeof( testRC4key6 ), testRC4plaintext6,
testRC4ciphertext6, sizeof( testRC4plaintext6 ) ) != CRYPT_OK )
return( CRYPT_ERROR );
return( CRYPT_OK );
}
/****************************************************************************
* *
* Control Routines *
* *
****************************************************************************/
/* Return context subtype-specific information */
int rc4GetInfo( const CAPABILITY_INFO_TYPE type,
void *varParam, const int constParam )
{
if( type == CAPABILITY_INFO_STATESIZE )
return( RC4_EXPANDED_KEYSIZE );
return( getInfo( type, varParam, constParam ) );
}
/****************************************************************************
* *
* RC4 En/Decryption Routines *
* *
****************************************************************************/
/* Encrypt/decrypt data. Since RC4 is a stream cipher, encryption and
decryption are the same operation */
int rc4Encrypt( CONTEXT_INFO *contextInfoPtr, BYTE *buffer, int noBytes )
{
CONV_INFO *convInfo = contextInfoPtr->ctxConv;
RC4( ( RC4_KEY * ) convInfo->key, noBytes, buffer, buffer );
return( CRYPT_OK );
}
/****************************************************************************
* *
* RC4 Key Management Routines *
* *
****************************************************************************/
/* Create an expanded RC4 key */
int rc4InitKey( CONTEXT_INFO *contextInfoPtr, const void *key,
const int keyLength )
{
CONV_INFO *convInfo = contextInfoPtr->ctxConv;
/* Copy the key to internal storage */
if( convInfo->userKey != key )
memcpy( convInfo->userKey, key, keyLength );
convInfo->userKeyLength = keyLength;
RC4_set_key( ( RC4_KEY * ) convInfo->key, keyLength, ( BYTE * ) key );
return( CRYPT_OK );
}
#endif /* USE_RC4 */
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