Sumchecker

Sumchecker is a pure Node.js solution to validating files specified in a checksum file, which are usually generated by programs such as sha256sum.

Requirements

sumchecker is tested with Node.js 12.13.0 (LTS) and above.

Usage

const sumchecker = require("sumchecker");

// NB: Top-level await is available in Node.js >= 14.8.0. Non-top-level-await syntax is left as an
// exercise to the reader.
try {
  await sumchecker(algorithm, checksumFilename, baseDir, filesToCheck);
  console.log("All files validate!");
} catch (error) {
  console.error("An error occurred", error);
}

Returns a Promise. The promise is resolved when all files specified in filesToCheck are validated. The promise is rejected otherwise.

Parameters

algorithm

String - The hash algorithm used in checksumFilename. Corresponds to the algorithms allowed by crypto.createHash().

checksumFilename

String - The path to the checksum file.

baseDir

String - The base directory for the files specified in filesToCheck.

filesToCheck

Array or String - one or more paths of the files that will be validated, relative to baseDir.

Errors

These are sumchecker-specific error classes that are passed to the promise's reject callback.

sumchecker.ChecksumMismatchError

When at least one of the files does not match its expected checksum.

Properties:

• filename (String) - a path to a file that did not match

sumchecker.ChecksumParseError

When the checksum file cannot be parsed (as in, it does not match the checksum file format).

Properties:

• lineNumber (Number) - the line number that could not be parsed
• line (String) - the raw line data that could not be parsed, sans newline

sumchecker.NoChecksumFoundError

When at least one of the files specified to check is not listed in the checksum file.

Properties:

• filename (String) - a filename from filesToCheck

Security contact information

See SECURITY.md.

Legal

This library is copyrighted under the terms of the Apache 2.0 License.

Enterprise support

Available as part of the Tidelift Subscription.

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