Thread Crypt

Description

Thread Crypt is a multi-threaded password hashing utility written in C. It reads a list of words from an input file and generates cryptographic hashes using the crypt_r library. The program leverages pthreads to distribute the hashing workload across multiple threads, allowing for efficient parallel processing.

🚀 Features

• Multi-threaded Performance: Utilizes pthreads to spin up a user-defined number of threads (up to 20) for concurrent hashing.
• Broad Algorithm Support: Supports a wide range of hashing algorithms, including DES (default), MD5, NT, SHA-256, SHA-512, bcrypt, yescrypt, and gost-yescrypt.
• Configurable Parameters: Allows precise control over the hashing process, including customizable salt lengths, algorithm rounds, and yescrypt-specific parameters.
• Thread-Safe: Uses crypt_r and mutex locks to ensure safe concurrent processing of the input word list.

🛠️ Installation

This project includes a Makefile for easy compilation.

To build the executable, simply run:

make

This will compile the thread_crypt.c source file, linking the necessary -lcrypt and -pthread libraries, and output the thread_crypt executable.

To clean up the compiled object files and the executable, run:

make clean

💻 Usage

The program requires an input file containing the words to be hashed. By default, it outputs to standard output (stdout), but an output file can be specified.

Basic Command:

./thread_crypt -i <input_file.txt>

Options:

• -i file: Input file name (required)

• -o file: Output file name (defaults to stdout)

• -t #: Number of threads to create (default 1, max 20)

• -a char: Algorithm to use for hashing (default DES):

• 0: DES

• 1: MD5

• 3: NT

• 5: SHA-256

• 6: SHA-512

• b: bcrypt

• y: yescrypt

• g: gost-yescrypt

• -l #: Length of the salt (valid lengths depend on the algorithm)

• -r #: Number of rounds for SHA-256, SHA-512, and bcrypt

• -p str: Parameters to use for yescrypt or gost-yescrypt (default is "j9T")

• -R #: Seed used for random salt generation via rand_r() (default 3)

• -v: Enable verbose mode for debugging output

• -h: Display the help text

Example: Hash words from passwords.txt using SHA-512 with 4 threads and save the results to hashes.txt:

./thread_crypt -i passwords.txt -o hashes.txt -t 4 -a 6

🧰 Technologies Used

• Language: C
• Libraries: <pthread.h>, <crypt.h>
• Build System: GNU Make