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26 lines
2.6 KiB
Markdown
26 lines
2.6 KiB
Markdown
### Hashcat test modules ###
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Each module provides the functions `module_constraints`, `module_generate_hash` and `module_verify_hash`. The `module_constraints` function should return the minimum and maximum length of the password, salt and the combination of password and salt in following order: password (pure), salt (pure), password (optimized), salt (optimized) and combination (optimized). The combination pair should be set to -1 if the hash mode is not concatinating the password and the salt in the same buffer in the kernel (typically raw hashes only). The first parameter to `module_generate_hash` is the password, which can be either in ASCII or binary (packed) form. The second parameter is the salt *which can be undefined for unsalted hash modes). The `module_verify_hash` function accepts a line from the cracks file, without the newline characters.
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During `single` and `passthrough` tests the `module_generate_hash` function must provide random values (e.g. salt) for hash generation if necessary. The test.pl script offers a few handy functions like `random_hex_string`, `random_numeric_string` and `random_bytes`. You can implement your own salt generation functions, if your mode has specific requirements.
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During `verify` tests the `module_verify_hash` function must parse the hash:password line and calculate a hash by passing all necessary data to `module_generate_hash`. How you pass it is up to you, as long as the first parameter is the password.
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**Important**: You have to call `pack_if_HEX_notation` as soon as you have parsed the password, or your tests will fail on passwords in the `$HEX[...]` format.
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If the algorithm has ambiguous hashes (e.g. partial case-insensetivity), the test module can provide an optional function `module_preprocess_hashlist`. It recieves a reference to the hashlist array and can unify the hashes in a way that guarantees the match with the output of `module_verify_hash`.
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#### Examples ####
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* For the most basic test modules, see [m00000.pm](m00000.pm) and [m00100.pm](m00100.pm)
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* For the basic salted hash tests, see [m00110.pm](m00110.pm) and [m00120.pm](m00120.pm)
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* For some sligthly more complex modules with PBKDF2 and encryption, see [m18400.pm](m18400.pm) and [m18600.pm](m18600.pm)
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* For a test module with hashlist preprocessing and a custom salt generation algorithm, see [m05600.pm](m05600.pm)
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NOTE:
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In order to not have double work while migrating existing code to test modules, here's a work sheet for everyone who wants to contribute. Simply put your name to reserve a particular mode here:
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https://docs.google.com/spreadsheets/d/14uxfwDiq316Qad0ILavWD2eeYSVr4vn2HD58hdlL35g/edit#gid=0
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