File Hasher

A fast and efficient CLI tool for calculating SHA256, SHA1, and MD5 hashes of files with progress indication and colored output. Optimized for performance with streaming support for large files.

Features

Multiple hash algorithms: SHA256, MD5, SHA1, or all at once
Streaming support: Efficiently processes large files without loading them into memory
Hash verification: Verify files against known hash values
Progress bars: Visual feedback for files larger than 10MB
Colored output: Easy-to-read terminal output
Multiple files: Process multiple files in a single command

Installation

From crates.io

cargo install file-hasher

From source

git clone https://github.com/marcuspat/file-hasher
cd file-hasher
cargo install --path .

Requirements

Rust 1.70 or later
Works on Linux, macOS, and Windows

Usage

Basic Usage

Hash a single file with SHA256 (default):

file-hasher file.txt

Multiple Files

Hash multiple files at once:

file-hasher file1.txt file2.txt file3.txt

Algorithm Selection

Choose a specific hash algorithm:

file-hasher --algorithm md5 file.txt
file-hasher --algorithm sha1 file.txt
file-hasher --algorithm sha256 file.txt

Calculate all hash types at once:

file-hasher --algorithm all file.txt

Hash Verification

Verify a file against a known hash:

file-hasher --verify dffd6021bb2bd5b0af676290809ec3a53191dd81c7f70a4b28688a362182986f file.txt

Verify with a specific algorithm:

file-hasher --algorithm md5 --verify 65a8e27d8879283831b664bd8b7f0ad4 file.txt

Examples

# Hash a large file (shows progress bar)
$ file-hasher large-video.mp4

File: large-video.mp4
  SHA256: a1b2c3d4e5f6789012345678901234567890abcdef1234567890abcdef123456

# Hash multiple files with all algorithms
$ file-hasher --algorithm all doc1.pdf doc2.pdf

File: doc1.pdf
  SHA256: 123abc...
  MD5: 456def...
  SHA1: 789ghi...

File: doc2.pdf
  SHA256: abc123...
  MD5: def456...
  SHA1: ghi789...

# Verify a downloaded file
$ file-hasher --verify expected_hash_here download.zip
✓ MATCH: Hash verification for 'download.zip'
  Expected: expected_hash_here
  Computed: expected_hash_here

Development

Running Tests

cargo test

Code Quality Checks

cargo clippy -- -D warnings
cargo fmt -- --check

CI/CD

The project includes GitHub Actions workflows that run on every push and pull request:

Run all tests
Check code with clippy
Verify code formatting

Performance

File Hasher is optimized for speed and memory efficiency:

Streaming: Processes files in chunks, using minimal memory regardless of file size
Progress indication: Automatic progress bars for files larger than 10MB
Multi-algorithm efficiency: When using --algorithm all, file is read only once
Benchmarks: Can hash a 1GB file in under 3 seconds on modern hardware (SHA256)

Contributing

Contributions are welcome! Please feel free to submit a Pull Request. For major changes, please open an issue first to discuss what you would like to change.

Fork the project
Create your feature branch (git checkout -b feature/amazing-feature)
Commit your changes (git commit -m 'Add some amazing feature')
Push to the branch (git push origin feature/amazing-feature)
Open a Pull Request

License

This project is licensed under the MIT License - see the LICENSE file for details.