gsum

gsum is a versatile command-line hashing tool written in Go, supporting a wide range of cryptographic and non-cryptographic hash algorithms. It offers advanced features like incremental hashing, GPG signing/verification, progress bars, and compatibility with existing Unix and Windows environments, making it ideal for developers, security enthusiasts, and system administrators.

Features

• Supported Algorithms: 40+ Algorithms including CRC32, BSD-CKSUM, MD5, SHA1, SHA256, SHA512, SHA3, BLAKE2B, HMAC, ChaCha20-Poly1305, XXHash, Kangaroo12, Keccak256, Streebog, SM3, Ssdeep.
• Incremental Hashing: Compute hashes for specific file ranges (e.g., 13%-40%) or in incremental chunks (5%).
• GPG Support: Sign and verify hash files with GPG for integrity and authenticity.
• Progress Bars: Visual feedback for long-running operations with customizable progress bars.
• Keyed Hashing: Support for algorithms requiring keys (e.g., HMAC, SipHash, BCrypt-SHA512, ChaCha20-Poly1305).
• Cross-Platform: Compatible with modern OSes.
• Modular Design: Extensible architecture for adding new hash algorithms.
• Simple: Consistent syntax, easy to use.

Installation

Go Installation:

go install github.com/guilt/gsum/cmd/gsum@latest

Usage

Run gsum with various flags to compute or verify hashes. Below are some examples:

Compute a Hash and Verify

Hash a file (default is SHA256):

gsum example.txt

Verify a file:

gsum -verify example.txt

Advanced Usages

Hash a file and show a progress bar:

gsum -progress example.txt

Hash a file using Kangaroo12:

gsum -algo=kangaroo12 example.txt

Verify a file using Kangaroo12:

gsum -algo=kangaroo12 -verify example.txt

Use SipHash with a 16-byte key:

gsum -algo=siphash -key=1234567890123456 example.txt

Hash a specific range (10%-20%) of a file:

gsum example.txt#10%-20%

Verify a specific range (10%-20%) of a file:

gsum -verify example.txt#10%-20%

Compute SHA1 hashes for 10% increments of a file:

gsum -algo=sha1 -increment=10% -progress example.txt

Verify a hash against a provided value as argument:

gsum -verify 80a3721188e40218b08b26776bc53bdae81e4784fff71d71450a197319cba113 example.txt

Hash multiple files to a single checksum file:

gsum -output=SHA256SUM example.txt example2.txt example3.txt

Verify checksums from a file:

gsum -verify=SHA256SUM example.txt

Generate SHA256SUM file with increments of 10% of a file:

gsum -increment=10% -output=SHA256SUM example.txt example2.txt

Verify SHA256SUM file with the generated hashes of the increment of 10% of a file:

gsum -verify=SHA256SUM example.txt

GPG Signing and Verification

Sign a hash file with GPG:

gsum -output=SHA256SUM -gpg=SHA256SUM.asc example.txt

Verify a GPG-signed hash file:

gsum -verify=SHA256SUM -gpg=SHA256SUM.asc example.txt

Full Help

List all supported algorithms and flags:

gsum -help

Supported Algorithms

• Adler-32: Lightweight non-cryptographic checksum for data integrity.
• ARGON2-SHA512: Memory-hard password hash with SHA-512 salt, 2015 competition winner.
• BCRYPT-SHA512: Adaptive password hash with SHA-512 for secure storage.
• BLAKE2B: High-speed cryptographic hash for security and performance.
• BLAKE2S: Compact BLAKE2 variant for embedded systems.
• BLAKE3: Ultra-fast cryptographic hash for modern applications.
• BSD-CKSUM: Castagnoli polynomial-based checksum for data integrity.
• ChaCha20-Poly1305: Authenticated encryption with 32-byte key.
• CityHash: Non-cryptographic hash optimized for strings.
• CRC32: Fast, non-cryptographic checksum for error detection.
• HMAC-BLAKE2B: Keyed HMAC using BLAKE2B for high-speed authentication.
• HMAC-MD5: Keyed HMAC using MD5 for legacy authentication.
• HMAC-RIPEMD160: Keyed HMAC using RIPEMD160 for OpenPGP authentication.
• HMAC-SHA1: Keyed HMAC using SHA1 for authentication.
• HMAC-SHA256: Keyed HMAC using SHA256 for secure authentication.
• HMAC-SHA512: Keyed HMAC using SHA512 for high-security authentication.
• Kangaroo12: High-performance Keccak-based hash.
• Keccak256: Pre-SHA3 256-bit hash for Ethereum blockchain.
• MD4: Legacy cryptographic hash, less secure.
• MD5: Legacy cryptographic hash, widely used but vulnerable.
• PBKDF2-SHA512: Key derivation with SHA-512 salt and hash for password hashing and key stretching.
• RIPEMD-160: 160-bit cryptographic hash for OpenPGP and certificates.
• SHA1: Legacy Secure Hash Algorithm, used in older systems.
• SHA224: NIST-standard 224-bit SHA-2 hash for signatures and certificates.
• SHA256: Secure 256-bit SHA-2 hash for modern cryptography.
• SHA3-224: 224-bit SHA-3 hash, post-quantum secure for signatures.
• SHA3-256: Keccak-based 256-bit cryptographic hash.
• SHA3-384: 384-bit SHA-3 hash for high-security applications.
• SHA3-512: 512-bit SHA-3 hash for maximum security.
• SHA384: NIST-standard 384-bit SHA-2 hash for high-security applications.
• SHA512: Secure 512-bit SHA-2 hash for cryptography.
• SHA512-224: Truncated 224-bit SHA-2 hash for compact signatures.
• SHA512-256: Truncated 256-bit SHA-2 hash for efficiency and security.
• SHAKE128: Extendable-output function for flexible hashing.
• SHAKE256: Extendable-output function for secure hashing.
• Scrypt-SHA512: Memory-hard key derivation with SHA-512 salt for password hashing.
• SipHash: Keyed hash for hash tables with 16-byte key.
• SM3: Chinese 256-bit cryptographic hash for blockchain and standards.
• Ssdeep: Fuzzy hash for similarity detection.
• Streebog: Russian cryptographic hash for signatures and certificates.
• TTH: Tiger-based tree hash for BitTorrent and Gnutella file verification.
• Whirlpool: AES-based 512-bit cryptographic hash for secure storage.
• XXHash: Non-cryptographic, high-speed hash for checksums.

Development

To contribute or extend gsum:

1. Add a New Algorithm:

   • Create a new package under pkg/hashers/ (e.g., pkg/hashers/newalgo).
   • Implement a ComputeHash function with the signature:

     func ComputeHash(reader io.Reader, key string, rs gfile.FileAndRangeSpec) (string, error)

   • Register the algorithm in pkg/hashers/hashers.go.

2. Build for a specific OS and architecture, such as Linux amd64:

   GOOS=linux GOARCH=amd64 go build -o gsum-linux-amd64 ./cmd/gsum

3. Run Tests:

   ./gsum-test.sh

Dependencies

• golang.org/x/crypto: Most Crypto Algorithms
• github.com/dchest/siphash: SipHash
• github.com/mimoo/GoKangarooTwelve: KangarooTwelve
• github.com/cespare/xxhash: XXHash
• github.com/zentures/cityhash: CityHash
• github.com/zeebo/blake3: BLAKE3
• github.com/schollz/progressbar/v3: Progress bars
• github.com/charmbracelet/log v0.4.2: Color Logging
• github.com/cxmcc/tiger: Tiger Tree Hash
• github.com/emersion/go-bcrypt: BCrypt Hash fork of golang.org/x/crypto with explicit Salt
• github.com/emmansun/gmsm: SM3 Hash
• github.com/glaslos/ssdeep: Ssdeep Fuzzy Hash
• github.com/jzelinskie/whirlpool: Whirlpool Hash

License

MIT License. See License for details.

Feedback

Built by Vibe coding.

Pull requests, issues, and feature requests are welcome! Vibe code it, Vibe debug it, Vibe test it, Vibe PR it, Vibe everything it.

• Authors: Grok 3.0, ChatGPT 4.1 and Debugger: Karthik Kumar Viswanathan
• Web : http://karthikkumar.org
• Email : me@karthikkumar.org

Happy hashing!