Minecraft MD5

Implementation of MD5 hash algorithm in Minecraft!

Author: YijunYuan @ Command Block Logic

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Requirements:

1. Minecraft version >=1.13.2 .
2. A good computer to run the game. I use 12GB memory and i7-8750H CPU for the world loading this datapack.

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Limitations:

1. We do NOT support empty string.
2. The length of the inputted string should less then 567.
3. We only support ASCII characters.

If you ignore these limitations, this datapack will give wrong result without any warning, althouth making a warning is not difficult at all.

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Usage:

1. Load the datapack.

2. Read the instructions carefully.

3. Run

   /function md5:reset
   

   Notice that this step is required before every calculation!

4. Input the string. Currently, this datapack supports two input methods:

   • Input with my another datapack 'keyboard' (I will write a tutorial for that in English in the future): This method is only suitable for short strings, for it's not very easy to use (just a toy). After finishing input, run

     /function md5:import_string
     

   • Input with the test function I wrote: Call the function like:

     test_string("Put the string you want to test here!");

     After compiling and runing, put the generated 'test.mcfunction' into

     .minecraft/<Your World Name>/datapacks/md5/data/md5/functions/
     

     Then run

     /function md5:test_string
     

5. Run

   /function md5:display_result
   

   to show the result.

6. For uninstallation, run

   /funtion md5:uninstall
   

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Tips:

• This is a big datapack, which may cause the loading process of the world being a little laggy. If you only need to deal with the short strings (length less than 56), you can delete

core120.mcfunction
core184.mcfunction
core248.mcfunction
core312.mcfunction
core376.mcfunction
core440.mcfunction
core504.mcfunction
core568.mcfunction

then reload the datapack. The speed will be much better then.

• If you try to understand the implementation, I recommand you to read the c++ code than the generated .mcfunction files. Actually the generated .mcfunction files have no comment in there and are only readable to the God. By the way, the Wiki page of MD5 may be helpful.

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Acknowledgement:

• @ruhuasiyu
• @xuan_su
• @zzzz_ustc