41 lines
1.5 KiB
C
41 lines
1.5 KiB
C
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#ifndef CSCRYPT_DES_H_
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#define CSCRYPT_DES_H_
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// sets parity for a 8-byte des key
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void des_set_odd_parity(uint8_t* key);
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// checks parity for a 8-byte des key
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// returns 0 if parity is not ok
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// returns 1 if parity is ok
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int8_t check_parity(const uint8_t* key);
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// matches the given 8-byte des key against known weak keys
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// return 0 if key is not weak
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// return 1 if key is weak
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int8_t des_is_weak_key(const uint8_t* key);
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// expands the given 8-byte des key "key"
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// into "shedule", which must be of type "uint32_t schedule[32]"
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// always returns 0
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int8_t des_set_key(const uint8_t* key, uint32_t* schedule);
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// crypts 8 bytes of "data" with key shedule "ks"
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// encrypt = 1 -> encrypt
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// encrypt = 0 -> decrypt
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void des(uint8_t* data, const uint32_t* schedule, int8_t do_encrypt);
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// these functions take a 8-byte des key and crypt data of any length ("len")
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void des_ecb_encrypt(uint8_t* data, const uint8_t* key, int32_t len);
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void des_ecb_decrypt(uint8_t* data, const uint8_t* key, int32_t len);
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void des_cbc_encrypt(uint8_t* data, const uint8_t* iv, const uint8_t* key, int32_t len);
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void des_cbc_decrypt(uint8_t* data, const uint8_t* iv, const uint8_t* key, int32_t len);
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void des_ede2_cbc_encrypt(uint8_t* data, const uint8_t* iv, const uint8_t* key1, const uint8_t* key2, int32_t len);
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void des_ede2_cbc_decrypt(uint8_t* data, const uint8_t* iv, const uint8_t* key1, const uint8_t* key2, int32_t len);
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void des_ecb3_encrypt(uint8_t* data, const uint8_t* key);
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void des_ecb3_decrypt(uint8_t* data, const uint8_t* key);
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#endif
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