1 /* Aes.h -- AES encryption / decryption 2 2013-01-18 : Igor Pavlov : Public domain */ 3 4 #ifndef __AES_H 5 #define __AES_H 6 7 #include "7zTypes.h" 8 9 EXTERN_C_BEGIN 10 11 #define AES_BLOCK_SIZE 16 12 13 /* Call AesGenTables one time before other AES functions */ 14 void AesGenTables(void); 15 16 /* UInt32 pointers must be 16-byte aligned */ 17 18 /* 16-byte (4 * 32-bit words) blocks: 1 (IV) + 1 (keyMode) + 15 (AES-256 roundKeys) */ 19 #define AES_NUM_IVMRK_WORDS ((1 + 1 + 15) * 4) 20 21 /* aes - 16-byte aligned pointer to keyMode+roundKeys sequence */ 22 /* keySize = 16 or 24 or 32 (bytes) */ 23 typedef void (MY_FAST_CALL *AES_SET_KEY_FUNC)(UInt32 *aes, const Byte *key, unsigned keySize); 24 void MY_FAST_CALL Aes_SetKey_Enc(UInt32 *aes, const Byte *key, unsigned keySize); 25 void MY_FAST_CALL Aes_SetKey_Dec(UInt32 *aes, const Byte *key, unsigned keySize); 26 27 /* ivAes - 16-byte aligned pointer to iv+keyMode+roundKeys sequence: UInt32[AES_NUM_IVMRK_WORDS] */ 28 void AesCbc_Init(UInt32 *ivAes, const Byte *iv); /* iv size is AES_BLOCK_SIZE */ 29 /* data - 16-byte aligned pointer to data */ 30 /* numBlocks - the number of 16-byte blocks in data array */ 31 typedef void (MY_FAST_CALL *AES_CODE_FUNC)(UInt32 *ivAes, Byte *data, size_t numBlocks); 32 extern AES_CODE_FUNC g_AesCbc_Encode; 33 extern AES_CODE_FUNC g_AesCbc_Decode; 34 extern AES_CODE_FUNC g_AesCtr_Code; 35 36 EXTERN_C_END 37 38 #endif 39
