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  • hash.coffee

  • ¶ 
    crypto = require 'crypto'
sha1 = require 'sha1'
  • ¶

    Generates a hash chain (or just a hash).

    1. value is the data that will be hashed. (String||Buffer)
    2. n is the number of times to compute the hash. (Number)
    3. alg is the algorithm to use. (String)
    exports.chain = (value, n = 1, alg = 'sha512') ->
    sum = (val) ->
        if alg is 'sha1' then return new Buffer(sha1(val), 'hex')
        hash = crypto.createHash alg
        hash.end val
        hash.read()

    [n, value] = [n - 1, sum value] until n is 0

    value