Rainbow

Rainbow is a Python script designed to crack numerical password hashes using a pre-computed hash table approach. It is specifically tailored to process CSV files containing usernames and their corresponding SHA-256 hash values, attempting to reverse-engineer the hash back into a four-digit numerical password.

Features

Efficient hash cracking for numerical passwords: specifically targets passwords in the range of 1000 to 9999.
CSV input/output: reads user-hash pairs from an input CSV file and writes cracked passwords to an output CSV file.
Logging: detailed logging to track the process flow and identify potential issues.

Requirements

Python 3.x
No external Python libraries are required beyond the standard library.

Usage

Prepare an input CSV file with the following format:

username,hash
john,5e884898da28047151d0e56f8dc6292773603f8186d01823
jane,ee26b0dd4af7e749aa1a8ee3c10aef57247cf9733dd0ad90

Run the script using Python, providing the input and output file names:
```
python rainbow.py input.csv output.csv
```
After execution, the output CSV file will contain the cracked passwords:
```
john,1234
jane,5678
```

How It Works

The script pre-computes SHA-256 hashes for all numbers in the range 1000 to 9999 and stores them in a dictionary. When reading the input file, it compares each hash against this dictionary. If a match is found, the script deduces that the original password was the number that corresponds to the hash.

Limitations

The script only works with numerical passwords in the specified range.
It is not designed for cracking more complex or longer passwords outside of the pre-defined scope.

Contributing

Contributions to Rainbow are welcome. Please ensure to follow best coding practices and include tests where applicable.

License

Rainbow is open-sourced software licensed under the MIT license.

alihadimoghadam/RainbowCrackPy