k4m4/hash-length-regex

Retrieve the regular expression of a hash of specified bit-length.

hash-length-regex

Retrieve the regular expression of a hash of specified bit-length.

Install

~ ❯❯❯ npm install hash-length-regex

Usage

const hashLengthRegex = require('hash-length-regex');

hashLengthRegex(128).test('nodejsrocks 1abcb33beeb811dca15f0ac3e47b88d9');
//=> true

hashLengthRegex(128, {exact: true}).test('nodejsrocks 1abcb33beeb811dca15f0ac3e47b88d9 foo');
//=> false

hashLengthRegex(256, {exact: true}).test('4696a780a2051b5a0f422970904da794adc1b499b2f4583e778e100a0bdd79cc');
//=> true

'nodejsrocks 1abcb33beeb811dca15f0ac3e47b88d9 rainbow 897b47d80a717715378832539b4c1340'.match(hashLengthRegex(128));
//=> ['1abcb33beeb811dca15f0ac3e47b88d9', '897b47d80a717715378832539b4c1340']

API

hashLengthRegex (bitLength, [options])

Returns a regular expression for matching hashes of the specified bit-length.

bitLength

Type: number

Number of bits of desired hash.

options

options.exact

Type: boolean Default: false (Matches any hash in a string)

Only match an exact string. Useful with RegExp#test() to check if a string is a hash of given bit-length.

License

MIT © Nikolaos Kamarinakis