hash - Cryptographic Checksum Utility

The hash module provides a unified interface for calculating MD5, SHA1, SHA256, SHA384, and SHA512 hashes. It includes tools for asserting matches and speeding up calculations via cosmo utilities.

When to Activate

• When verifying the integrity of downloaded files (e.g., ISOs, packages).
• When generating checksums for files to be shared or archived.
• When performing silent hash comparisons in scripts (match).
• When checking multiple files simultaneously.

Core Principles & Rules

• Multi-Algorithm: Automatically detects the algorithm when verifying based on hash length.
• Speedup: Supports speedup subcommand to install optimized hash tools.
• Script-Ready: Use match for silent success/failure detection in automation.

Patterns & Examples

Calculate Hash

# Get the SHA256 checksum of a file
x hash sha256 myfile.txt

Assert Match

# Verify a file against an expected hash with visual feedback
x hash assert myfile.txt EXPECTED_HASH_STRING

Batch Processing

# Calculate MD5 for all .txt files in the directory
x hash md5 *.txt

Checklist

• Confirm the target file and desired hash algorithm.
• Verify if an interactive assertion or a silent match is needed.
• Ensure the expected hash string is correctly provided.