cscrypt/des.h

   1 #ifndef CSCRYPT_DES_H_
   2 #define CSCRYPT_DES_H_
   3
   4         // sets parity for a 8-byte des key
   5         void des_set_odd_parity(uint8_t* key);
   6
   7         // checks parity for a 8-byte des key
   8         // returns 0 if parity is not ok
   9         // returns 1 if parity is ok
  10         int8_t check_parity(const uint8_t* key);
  11
  12         // matches the given 8-byte des key against known weak keys
  13         // return 0 if key is not weak
  14         // return 1 if key is weak
  15         int8_t des_is_weak_key(const uint8_t* key);
  16
  17         // expands the given 8-byte des key "key"
  18         // into "shedule", which must be of type "uint32_t schedule[32]"
  19         // always returns 0
  20         int8_t des_set_key(const uint8_t* key, uint32_t* schedule);
  21
  22         // crypts 8 bytes of "data" with key shedule "ks"
  23         // encrypt = 1 -> encrypt
  24         // encrypt = 0 -> decrypt
  25         void des(uint8_t* data, const uint32_t* schedule, int8_t do_encrypt);
  26
  27         // these functions take a 8-byte des key and crypt data of any length ("len")
  28         void des_ecb_encrypt(uint8_t* data, const uint8_t* key, int32_t len);
  29         void des_ecb_decrypt(uint8_t* data, const uint8_t* key, int32_t len);
  30
  31         void des_cbc_encrypt(uint8_t* data, const uint8_t* iv, const uint8_t* key, int32_t len);
  32         void des_cbc_decrypt(uint8_t* data, const uint8_t* iv, const uint8_t* key, int32_t len);
  33
  34         void des_ede2_cbc_encrypt(uint8_t* data, const uint8_t* iv, const uint8_t* key1, const uint8_t* key2, int32_t len);
  35         void des_ede2_cbc_decrypt(uint8_t* data, const uint8_t* iv, const uint8_t* key1, const uint8_t* key2, int32_t len);
  36
  37         void des_ecb3_encrypt(uint8_t* data, const uint8_t* key);
  38         void des_ecb3_decrypt(uint8_t* data, const uint8_t* key);
  39
  40 #endif