text: 'use strict';
  
  const crypto = require('crypto');
  
  const ALGORITHM = 'sha1';
  
  function createSha1Hash() {
    return crypto.createHash(ALGORITHM);
  }
  
  exports.hash = content => {
    const hash = createSha1Hash();
    hash.update(content);
    return hash.digest();
  };
  
  exports.createSha1Hash = createSha1Hash;
  