1   /*********************************************************************
 2   * Copyright (c) 2016 Pieter Wuille                                   *
 3   * Distributed under the MIT software license, see the accompanying   *
 4   * file COPYING or http://www.opensource.org/licenses/mit-license.php.*
 5   **********************************************************************/
 6  
 7  #ifndef _CTAES_H_
 8  #define _CTAES_H_ 1
 9  
10  #include <stdint.h>
11  #include <stdlib.h>
12  
13  typedef struct {
14      uint16_t slice[8];
15  } AES_state;
16  
17  typedef struct {
18      AES_state rk[11];
19  } AES128_ctx;
20  
21  typedef struct {
22      AES_state rk[13];
23  } AES192_ctx;
24  
25  typedef struct {
26      AES_state rk[15];
27  } AES256_ctx;
28  
29  void AES128_init(AES128_ctx* ctx, const unsigned char* key16);
30  void AES128_encrypt(const AES128_ctx* ctx, size_t blocks, unsigned char* cipher16, const unsigned char* plain16);
31  void AES128_decrypt(const AES128_ctx* ctx, size_t blocks, unsigned char* plain16, const unsigned char* cipher16);
32  
33  void AES192_init(AES192_ctx* ctx, const unsigned char* key24);
34  void AES192_encrypt(const AES192_ctx* ctx, size_t blocks, unsigned char* cipher16, const unsigned char* plain16);
35  void AES192_decrypt(const AES192_ctx* ctx, size_t blocks, unsigned char* plain16, const unsigned char* cipher16);
36  
37  void AES256_init(AES256_ctx* ctx, const unsigned char* key32);
38  void AES256_encrypt(const AES256_ctx* ctx, size_t blocks, unsigned char* cipher16, const unsigned char* plain16);
39  void AES256_decrypt(const AES256_ctx* ctx, size_t blocks, unsigned char* plain16, const unsigned char* cipher16);
40  
41  #endif