A library to seal and unseal a string value with a secret. The value is encrypted with aes-256-gcm, padded to a minimum of 32 bytes and padded to a multiple of 8 bytes beyond that.

npm install @theroyalwhee0/highseal

The Highseal CLI install allows sealing and unsealing of values without writing code.

npm install --global @theroyalwhee0/highseal-cli

import { seal, unseal, isSealed } from '@theroyalwhee0/highseal'; const secret = 'marabou stork'; const initial = 'Leptoptilos crumenifer'; console.info('Initial Value:', initial); const sealed = seal(initial, secret); console.info('Sealed Value:', sealed); console.info(`Value ${isSealed(sealed) ? 'appears' : 'does not appear'} to be sealed.`); const [err, unsealed] = unseal(sealed, secret); if(err) { console.error('Unable to unseal value:', err); } else { console.info('Unsealed Value:', unsealed); }

Running npm run test will run the test suite. Running npm run test-watch will run the test suite in watch mode.

• This code has not been audited or verified by a third party.
• The sealed values timestamps leak metadata of when they were generated.
• The sealed values counters may leak metadata since incremented counters indicate batches.

• GitHub: https://github.com/theroyalwhee0/highseal
• NPM: https://www.npmjs.com/package/@theroyalwhee0/highseal
• Changelog: https://github.com/theroyalwhee0/highseal/blob/main/changelog.md
• Highseal CLI: https://github.com/theroyalwhee0/highseal/tree/main/cli

Copyright 2022-2023 Adam Mill

This library is released under Apache 2 license. See LICENSE for more details.