@cumulus/checksum

@cumulus/checksum

Checksum

The @cumulus/checksum library provides checksum functionality used by Cumulus packages and tasks. Currently the supported input includes file streams, and supported checksum algorithms include cksum and the algorithms available to the crypto package, as documented here.

Usage

const fs = require('fs');
const { generateChecksumFromStream } = require('@cumulus/checksum');

const stream = fs.createReadStream('myDataFile.hdf');
const myCksum = generateChecksumFromStream('cksum', stream);

API

checksum

• checksum
  • .generateChecksumFromStream(algorithm, stream, [options]) ⇒ Promise.<(number|string)>
  • .validateChecksumFromStream(algorithm, stream, expectedSum, [options]) ⇒ Promise.<boolean>

checksum.generateChecksumFromStream(algorithm, stream, [options]) ⇒ Promise.<(number|string)>

Create file checksum from readable stream

Kind: static method of checksum
Returns: Promise.<(number|string)> - the file checksum

Param	Type	Description
algorithm	string	Checksum algorithm type
stream	stream.Readable	A readable file stream
[options]	Object	Checksum options, see crypto.createHash()

checksum.validateChecksumFromStream(algorithm, stream, expectedSum, [options]) ⇒ Promise.<boolean>

Validate expected checksum against calculated checksum

Kind: static method of checksum
Returns: Promise.<boolean> - whether expectedSum === calculatedSum

Param	Type	Description
algorithm	string	Checksum algorithm
stream	stream.Readable	A readable file stream
expectedSum	number | string	expected checksum
[options]	Object	Checksum options

About Cumulus

Cumulus is a cloud-based data ingest, archive, distribution and management prototype for NASA's future Earth science data streams.

Cumulus Documentation

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Changelog

[v18.5.1] 2024-10-25

Please note changes in v18.5.1 may not yet be released in future versions, as this is a backport/patch release on the v18.5.x series of releases. Updates that are included in the future will have a corresponding CHANGELOG entry in future releases.

Added

• CUMULUS-3773
  • Added sftpFastDownload configuration to SyncGranule task.
  • Updated @cumulus/sftp-client and @cumulus/ingest/SftpProviderClient to support both regular and fastDownload.
  • Added sftp support to FakeProvider
  • Added sftp integration test
• CUMULUS-3756
  • Added excludeFileRegex configuration to UpdateGranulesCmrMetadataFileLinks
  • This is to allow files matching specified regex to be excluded when updating the Related URLs list
  • Defaults to the current behavior of excluding no files.
• CUMULUS-3919
  • Added terraform variables disableSSL and rejectUnauthorized to tf-modules/cumulus-rds-tf module.

Changed

• CUMULUS-3928
  • updated publish scripting to use [e-mail] for user email
  • updated publish scripting to use esm over common import of latest-version
  • updated bigint testing to remove intermitted failure source.
  • updated postgres dependency version
• CUMULUS-3838
  • Updated python dependencies to latest:
    • cumulus-process-py 1.4.0
    • cumulus-message-adapter-python 2.3.0

Fixed

• CUMULUS-3902
  • Update error handling to use AWS SDK V3 error classes instead of properties on js objects