tomcrypt_cipher.h

AES加密算法对socket通信过程进行加密传输

/* ---- SYMMETRIC KEY STUFF -----
 *
 * We put each of the ciphers scheduled keys in their own structs then we put all of 
 * the key formats in one union.  This makes the function prototypes easier to use.
 */
#ifdef LTC_BLOWFISH
struct blowfish_key {
   ulong32 S[4][256];
   ulong32 K[18];
};
#endif

#ifdef LTC_RC5
struct rc5_key {
   int rounds;
   ulong32 K[50];
};
#endif

#ifdef LTC_RC6
struct rc6_key {
   ulong32 K[44];
};
#endif

#ifdef LTC_SAFERP
struct saferp_key {
   unsigned char K[33][16];
   long rounds;
};
#endif

#ifdef LTC_RIJNDAEL
struct rijndael_key {
   ulong32 eK[60], dK[60];
   int Nr;
};
#endif

#ifdef LTC_KSEED
struct kseed_key {
    ulong32 K[32], dK[32];
};
#endif

#ifdef LTC_KASUMI
struct kasumi_key {
    ulong32 KLi1[8], KLi2[8],
            KOi1[8], KOi2[8], KOi3[8],
            KIi1[8], KIi2[8], KIi3[8];
};
#endif

#ifdef LTC_XTEA
struct xtea_key {
   unsigned long A[32], B[32];
};
#endif

#ifdef LTC_TWOFISH
#ifndef LTC_TWOFISH_SMALL
   struct twofish_key {
      ulong32 S[4][256], K[40];
   };
#else
   struct twofish_key {
      ulong32 K[40];
      unsigned char S[32], start;
   };
#endif
#endif

#ifdef LTC_SAFER
#define LTC_SAFER_K64_DEFAULT_NOF_ROUNDS     6
#define LTC_SAFER_K128_DEFAULT_NOF_ROUNDS   10
#define LTC_SAFER_SK64_DEFAULT_NOF_ROUNDS    8
#define LTC_SAFER_SK128_DEFAULT_NOF_ROUNDS  10
#define LTC_SAFER_MAX_NOF_ROUNDS            13
#define LTC_SAFER_BLOCK_LEN                  8
#define LTC_SAFER_KEY_LEN     (1 + LTC_SAFER_BLOCK_LEN * (1 + 2 * LTC_SAFER_MAX_NOF_ROUNDS))
typedef unsigned char safer_block_t[LTC_SAFER_BLOCK_LEN];
typedef unsigned char safer_key_t[LTC_SAFER_KEY_LEN];
struct safer_key { safer_key_t key; };
#endif

#ifdef LTC_RC2
struct rc2_key { unsigned xkey[64]; };
#endif

#ifdef LTC_DES
struct des_key {
    ulong32 ek[32], dk[32];
};

struct des3_key {
    ulong32 ek[3][32], dk[3][32];
};
#endif

#ifdef LTC_CAST5
struct cast5_key {
    ulong32 K[32], keylen;
};
#endif

#ifdef LTC_NOEKEON
struct noekeon_key {
    ulong32 K[4], dK[4];
};
#endif

#ifdef LTC_SKIPJACK 
struct skipjack_key {
    unsigned char key[10];
};
#endif

#ifdef LTC_KHAZAD
struct khazad_key {
   ulong64 roundKeyEnc[8 + 1]; 
   ulong64 roundKeyDec[8 + 1]; 
};
#endif

#ifdef LTC_ANUBIS
struct anubis_key { 
   int keyBits; 
   int R; 
   ulong32 roundKeyEnc[18 + 1][4]; 
   ulong32 roundKeyDec[18 + 1][4]; 
}; 
#endif

#ifdef LTC_MULTI2
struct multi2_key {
    int N;
    ulong32 uk[8];
};
#endif

typedef union Symmetric_key {
#ifdef LTC_DES
   struct des_key des;
   struct des3_key des3;
#endif
#ifdef LTC_RC2
   struct rc2_key rc2;
#endif
#ifdef LTC_SAFER
   struct safer_key safer;
#endif
#ifdef LTC_TWOFISH
   struct twofish_key  twofish;
#endif
#ifdef LTC_BLOWFISH
   struct blowfish_key blowfish;
#endif
#ifdef LTC_RC5
   struct rc5_key      rc5;
#endif
#ifdef LTC_RC6
   struct rc6_key      rc6;
#endif
#ifdef LTC_SAFERP
   struct saferp_key   saferp;
#endif
#ifdef LTC_RIJNDAEL
   struct rijndael_key rijndael;
#endif
#ifdef LTC_XTEA
   struct xtea_key     xtea;
#endif
#ifdef LTC_CAST5
   struct cast5_key    cast5;
#endif
#ifdef LTC_NOEKEON
   struct noekeon_key  noekeon;
#endif   
#ifdef LTC_SKIPJACK
   struct skipjack_key skipjack;
#endif
#ifdef LTC_KHAZAD
   struct khazad_key   khazad;
#endif
#ifdef LTC_ANUBIS
   struct anubis_key   anubis;
#endif
#ifdef LTC_KSEED
   struct kseed_key    kseed;
#endif
#ifdef LTC_KASUMI
   struct kasumi_key   kasumi;
#endif  
#ifdef LTC_MULTI2
   struct multi2_key   multi2;
#endif
   void   *data;
} symmetric_key;

#ifdef LTC_ECB_MODE
/** A block cipher ECB structure */
typedef struct {
   /** The index of the cipher chosen */
   int                 cipher, 
   /** The block size of the given cipher */
                       blocklen;
   /** The scheduled key */                       
   symmetric_key       key;
} symmetric_ECB;
#endif

#ifdef LTC_CFB_MODE
/** A block cipher CFB structure */
typedef struct {
   /** The index of the cipher chosen */
   int                 cipher, 
   /** The block size of the given cipher */                        
                       blocklen, 
   /** The padding offset */
                       padlen;
   /** The current IV */
   unsigned char       IV[MAXBLOCKSIZE], 
   /** The pad used to encrypt/decrypt */ 
                       pad[MAXBLOCKSIZE];
   /** The scheduled key */
   symmetric_key       key;
} symmetric_CFB;
#endif

#ifdef LTC_OFB_MODE
/** A block cipher OFB structure */
typedef struct {
   /** The index of the cipher chosen */
   int                 cipher, 
   /** The block size of the given cipher */                        
                       blocklen, 
   /** The padding offset */
                       padlen;
   /** The current IV */
   unsigned char       IV[MAXBLOCKSIZE];
   /** The scheduled key */
   symmetric_key       key;
} symmetric_OFB;
#endif

#ifdef LTC_CBC_MODE
/** A block cipher CBC structure */
typedef struct {
   /** The index of the cipher chosen */
   int                 cipher, 
   /** The block size of the given cipher */                        
                       blocklen;
   /** The current IV */
   unsigned char       IV[MAXBLOCKSIZE];
   /** The scheduled key */
   symmetric_key       key;
} symmetric_CBC;
#endif


#ifdef LTC_CTR_MODE
/** A block cipher CTR structure */
typedef struct {
   /** The index of the cipher chosen */
   int                 cipher,
   /** The block size of the given cipher */                        
                       blocklen, 
   /** The padding offset */
                       padlen, 
   /** The mode (endianess) of the CTR, 0==little, 1==big */
                       mode,
   /** counter width */
                       ctrlen;

   /** The counter */                       
   unsigned char       ctr[MAXBLOCKSIZE], 
   /** The pad used to encrypt/decrypt */                       
                       pad[MAXBLOCKSIZE];
   /** The scheduled key */
   symmetric_key       key;
} symmetric_CTR;
#endif


#ifdef LTC_LRW_MODE
/** A LRW structure */
typedef struct {
    /** The index of the cipher chosen (must be a 128-bit block cipher) */
    int               cipher;

    /** The current IV */
    unsigned char     IV[16],
 
    /** the tweak key */
                      tweak[16],

    /** The current pad, it's the product of the first 15 bytes against the tweak key */
                      pad[16];