mirror of
https://github.com/bol-van/zapret.git
synced 2024-12-30 21:20:33 +05:00
79 lines
3.3 KiB
C
79 lines
3.3 KiB
C
|
/******************************************************************************
|
||
|
|
*
|
||
|
|
* THIS SOURCE CODE IS HEREBY PLACED INTO THE PUBLIC DOMAIN FOR THE GOOD OF ALL
|
||
|
|
*
|
||
|
|
* This is a simple and straightforward implementation of the AES Rijndael
|
||
|
|
* 128-bit block cipher designed by Vincent Rijmen and Joan Daemen. The focus
|
||
|
|
* of this work was correctness & accuracy. It is written in 'C' without any
|
||
|
|
* particular focus upon optimization or speed. It should be endian (memory
|
||
|
|
* byte order) neutral since the few places that care are handled explicitly.
|
||
|
|
*
|
||
|
|
* This implementation of Rijndael was created by Steven M. Gibson of GRC.com.
|
||
|
|
*
|
||
|
|
* It is intended for general purpose use, but was written in support of GRC's
|
||
|
|
* reference implementation of the SQRL (Secure Quick Reliable Login) client.
|
||
|
|
*
|
||
|
|
* See: http://csrc.nist.gov/archive/aes/rijndael/wsdindex.html
|
||
|
|
*
|
||
|
|
* NO COPYRIGHT IS CLAIMED IN THIS WORK, HOWEVER, NEITHER IS ANY WARRANTY MADE
|
||
|
|
* REGARDING ITS FITNESS FOR ANY PARTICULAR PURPOSE. USE IT AT YOUR OWN RISK.
|
||
|
|
*
|
||
|
|
*******************************************************************************/
|
||
|
|
|
||
|
|
#pragma once
|
||
|
|
|
||
|
|
/******************************************************************************/
|
||
|
|
#define AES_DECRYPTION 0 // whether AES decryption is supported
|
||
|
|
/******************************************************************************/
|
||
|
|
|
||
|
|
#include <string.h>
|
||
|
|
|
||
|
|
#define AES_ENCRYPT 1 // specify whether we're encrypting
|
||
|
|
#define AES_DECRYPT 0 // or decrypting
|
||
|
|
|
||
|
|
#if defined(_MSC_VER)
|
||
|
|
#include <basetsd.h>
|
||
|
|
typedef UINT32 uint32_t;
|
||
|
|
#else
|
||
|
|
#include <inttypes.h>
|
||
|
|
#endif
|
||
|
|
|
||
|
|
typedef unsigned char uchar; // add some convienent shorter types
|
||
|
|
typedef unsigned int uint;
|
||
|
|
|
||
|
|
|
||
|
|
/******************************************************************************
|
||
|
|
* AES_INIT_KEYGEN_TABLES : MUST be called once before any AES use
|
||
|
|
******************************************************************************/
|
||
|
|
void aes_init_keygen_tables(void);
|
||
|
|
|
||
|
|
|
||
|
|
/******************************************************************************
|
||
|
|
* AES_CONTEXT : cipher context / holds inter-call data
|
||
|
|
******************************************************************************/
|
||
|
|
typedef struct {
|
||
|
|
int mode; // 1 for Encryption, 0 for Decryption
|
||
|
|
int rounds; // keysize-based rounds count
|
||
|
|
uint32_t *rk; // pointer to current round key
|
||
|
|
uint32_t buf[68]; // key expansion buffer
|
||
|
|
} aes_context;
|
||
|
|
|
||
|
|
|
||
|
|
/******************************************************************************
|
||
|
|
* AES_SETKEY : called to expand the key for encryption or decryption
|
||
|
|
******************************************************************************/
|
||
|
|
int aes_setkey(aes_context *ctx, // pointer to context
|
||
|
|
int mode, // 1 or 0 for Encrypt/Decrypt
|
||
|
|
const uchar *key, // AES input key
|
||
|
|
uint keysize); // size in bytes (must be 16, 24, 32 for
|
||
|
|
// 128, 192 or 256-bit keys respectively)
|
||
|
|
// returns 0 for success
|
||
|
|
|
||
|
|
/******************************************************************************
|
||
|
|
* AES_CIPHER : called to encrypt or decrypt ONE 128-bit block of data
|
||
|
|
******************************************************************************/
|
||
|
|
int aes_cipher(aes_context *ctx, // pointer to context
|
||
|
|
const uchar input[16], // 128-bit block to en/decipher
|
||
|
|
uchar output[16]); // 128-bit output result block
|
||
|
|
// returns 0 for success
|