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Add xor batches and useful tools to your .bashrc file for cryptography.
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jpegleg/cryptoCore
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cryptoCore is a dot file, or rather is concatenated with your .bashrc There is no cryptographic software in cryptoCore, but aliases and functions for other software in the Linux shell environment. Also see https://github.com/jpegleg/metarc for my big .bashrc for more functions and aliases. Beyond the practical functions and aliases, there is also some on disk shell XOR functionality for teaching cryptography, academic mathmatical explorations and proofs. Setup the additions to your bashrc file and place the xor.sh script in ~/Scripts/ To install the changes and script use: bash ./setup.sh Important Note: Both your msg and your key seed files must contain binary strings and of the same length. Place them in the ~/seeds directory. The files need to be named a.xor and b.xor. This bashrc addition is for bash/shell hackers who study or work in cryptography and or discrete probability. Usage example: Ad-hoc XOR Batches These functions were created for academic usage and prototyping. But there is some practical usage here too. In this example, you are doing a forensic statistical analysis of an intercepted one time pad. Here is one example: You have a one time pad as follows: 11001101111111001001001001000001001 And you need to XOR it against your library of 35 bit strings. Send your pad to a.xor: echo -n 11001101111111001001001001000001001 > ~/seeds/a.xor And place only your library of 35 bit strings in ~/seeds/ Then run an XOR batch against the one time pad, outputting the results to files: nohup otpbatch The stripper function is used to sanitize data, just a wrapper for the tr command. Here we use stripper to validate the test file. These should both return 35. cat ~/seeds/a.xor | wc -c cat ~/seeds/a.xor | stripper | wc -c Validate the whole test library: libvalidate To just generate a dataset and get playing, you can try the following: cd ~/seeds rm * libgen cp 1000.xor a.xor touch b.xor reqbatch A recursive XOR batch can be done multiple ways with these functions, one example is a 4 deep recusive batch against 010010101010 with 4 inputs: cd ~/seeds rm -f * echo -n "010010101010" > a.xor echo -n "111010010010" > b.xor echo -n "111011111000" > c.xor echo -n "000011111010" > d.xor echo -n "100110100111" > e.xor for ((i=0; i < 4; i++)); do reqbatch done The reqbatch function carries out the same operations as the otp batch function but has verbose output and doesn't background the process so it can be used within other loops without making a mess with mutiple otpbatches running at the same time.
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