keygrip
A verification mechanism using multiple different keys stored in a keychain to cryptographically sign data using SHA256 or SHA512 with HMAC. Code based on https://github.com/crypto-utils/keygrip.
API
import { Keygrip, Algorithm } from 'https://deno.land/x/keygrip/mod.ts';keygrip = new Keygrip( keys [, algo=Algorithm.SHA256] )
Creates a class for storing private keys in a keychain to easily hash and verify data with multiple different keys.
Returns: A new instance of the keygrip class
Parameters
keys {string[]}-algo {Algorithm}-
keygrip.sign( data [, key] )
Cryptographically sign data by a secret key
Returns: a string with the signed hash of the data.
Parameters
data {string}- Data to signkey {string|number}- If key is a number it resolves the key as an index in the keychain. If it is a string it is used directly. Defaults to first key in the keychain.
keygrip.verify( data, digest )
Verifies if the data matches the digest with any of the keys in the keychain.
Returns: A boolean if any key in the chain could be used to achieve the same digest.
Parameters
data {string}- Data to digest and verifydigest {string}- Digested hash to compare against
keygrip.index( data, digest )
Resolve the index of which key was used to digest specified data.
Returns: A number from -1 to the last index of the keychain
Parameters
data {string}- Data to digestdigest {string}- Digested hash to compare against
Examples
import { Keygrip, Algorithm } from 'https://deno.land/x/keygrip/mod.ts';
// Uses sha256 by default, could be changed to sha512 with second parameter
const keygrip = new Keygrip([ 'shh', 'secret', 'keys' ]);
// Sign data with default key
const hash = keygrip.sign('some_important_data');
// Verify the data using the hash
keygrip.verify('some_important_data', hash);
// returns true
// Get index of key in keygrip
keygrip.index('some_important_data', hash);
// returns 0, for key at index 0 in the Keygrip keychainTesting
$ deno test