35 lines
558 B
C
35 lines
558 B
C
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#ifndef DESCBC_H
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#define DESCBC_H
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#include "des.h"
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class DESCBC
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{
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public:
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DESCBC(ui64 key, ui64 iv) : des(key), iv(iv), last_block(iv) {}
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inline ui64 encrypt(ui64 block)
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{
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last_block = des.encrypt(block ^ last_block);
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return last_block;
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}
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inline ui64 decrypt(ui64 block)
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{
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ui64 result = des.decrypt(block) ^ last_block;
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last_block = block;
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return result;
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}
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inline void reset()
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{
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last_block = iv;
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}
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private:
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DES des;
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ui64 iv;
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ui64 last_block;
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};
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#endif // DESCBC_H
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