huangjingxian / des Goto Github PK

This code is written in C++ and python.

For simplicity, you can run, ./encode.sh to get a demo encode. The 8 byte plain text is in ./encode/enc0, the 64 bit plain text is in ./encode/enc. The 8 byte encoded cypher text is in ./encode/ans0, the 64 bit encoded cypher text is in ./encode/ans.

You can run ./decode.sh to get a demo decode The 8 byte cypher text is in ./decode/dec0, the 64 bit cypher text is in ./decode/dec. The 8 byte decoded plain text is in ./decode/ans0, the 64 bit decoded plain text is in ./decode/ans.

Details:

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Encoding: all example I/O files are in directory "encode"

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1. If your inputs are 8-byte askii code: You should build a file named "enc0" Format: key: 8-byte key plain text: 8-byte text Example file in ./encode/enc0 and run python a2b.py < ./encode/enc0 The output is a file named "enc" Format: key: 64-bit key plain text: 64-bit text Example file in ./encode/enc

2. If your inputs are 64-bit binary code: You should build a file named "enc", the format is the same as the output of step 1. Example file in ./encode/enc

3. run make Then run ./DES --mode enc --file ./encode/enc The output file is named "ans": Format: key: 64-bit key cypher: 64-bit text Example file in ./encode/ans

4. If you want to get a 8-byte cypher text, run python b2a.py < ./encode/ans The output file is named "ans0" Format: key: 8-byte key cypher: 8-byte text Example file in ./encode/ans0

Step 3 and 4 get the file with the encoded cypher.

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Decoding: all example I/O files are in directory "decode"

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1. If your inputs are 8-byte askii code: You should build a file named "dec0" Format: key: 8-byte key cypher: 8-byte text Example file in ./decode/dec0 and run python a2b.py < ./decode/dec0 The output is a file named "dec" Format: key: 64-bit key cypher: 64-bit text Example file in ./decode/dec

2. If your inputs are 64-bit binary code: You should build a file named "dec", the format is the same as the output of step 1. Example file in ./decode/dec

3. run make Then run ./DES --mode dec --file ./decode/dec The output file is named "ans": Format: key: 64-bit key plain text: 64-bit text Example file in ./decode/ans

4. If you want to get a 8-byte cypher text, run python b2a.py < ./decode/ans The output file is named "ans0" Format: key: 8-byte key plain text: 8-byte text Example file in ./decode/ans0

Step 3 and 4 get the file with the decoded plain text.