About

File hash checker represents a minimal solution meeting the following requirements:

• Calculate the BLAKE3, SHA256, and/or SHA512 hashes of one or more files in sequence (for loop, iterator) or parallel (threading, messaging, rayon parallel iterator)
• Provide library API
• Benchmarks via criterion
• Minimal dependencies: blake3, sha2, anyhow, clap, rayon
• Provide a CLI utiility:
  • Simpler and more straightforward usage than sha256sum, b3sum
  • Save the hash to an adjacent hash file (if it doesn't already exist) (.sha256, .sha512, .b3)
  • Compare the current hash to an adjacent hash file (if it exists)

Usage

$ fhc -h
!run:../target/release/fhc -h

$ fhc -V
!run:../target/release/fhc -V

Example

1. Run fhc against one or more files to calculate and print the SHA256 or BLAKE3 hash for each file to stdout and save in adjacent hash files.
2. At any later point, run fhc against one or more files with adjacent hash files to re-calculate the hash for each file and report OK if the hashes match and FAILED if the hashes do not match.

Benchmark

!inc:../CHANGELOG.md