Namespace Pot.Crypt

Defined in: <pot.js>.

Namespace Summary
Constructor Attributes	Constructor Name and Description
	Pot.Crypt Crypt and Hash utilities.

Method Summary
Method Attributes	Method Name and Description
<static>	Pot.Crypt.Arc4((key)) ARC4 symmetric cipher encryption/decryption.
<static>	Pot.Crypt.crc32(data) Calculate the 32-bit CRC (cyclic redundancy checksum) checksum.
<static>	Pot.Crypt.hashCode(data) String hash function similar to java.lang.String.hashCode().
<static>	Pot.Crypt.md5(data) Calculate the MD5 hash of a string.
<static>	Pot.Crypt.sha1(data) Calculate the SHA1 hash of a string.

Namespace Detail

Pot.Crypt

Crypt and Hash utilities.

Method Detail

<static> {Function} Pot.Crypt.Arc4((key))

ARC4 symmetric cipher encryption/decryption. Original algorithm: {@link http://www.mozilla.org/projects/security/pki/nss/ draft-kaukonen-cipher-arcfour-03.txt}

  var arc4 = new Pot.Crypt.Arc4();
  arc4.setKey('hoge');
  var cipherText = arc4.encrypt('Hello World!');
  debug('cipherText = ' + cipherText);
  // @results 'cipherText = (...cipherText)'
  var origText = arc4.decrypt(cipherText);
  debug('origText = ' + origText);
  // @results 'origText = Hello World!'

Parameters:
{String} (key): Secret key for encryption.

Returns:: {Object} The instance of Arc4 object.

<static> {Function} Pot.Crypt.crc32(data)

Calculate the 32-bit CRC (cyclic redundancy checksum) checksum.

  debug(crc32('abc123'));
  // @results  -821904548

Parameters:
{String|Array} data: Data.

Returns:: {Number} CRC checksum.

<static> {Function} Pot.Crypt.hashCode(data)

String hash function similar to java.lang.String.hashCode(). The hash code for a string is computed as s[0] * 31 ^ (n - 1) + s[1] * 31 ^ (n - 2) + ... + s[n - 1], where s[i] is the ith character of the string and n is the length of the string. We mod the result to make it between 0 (inclusive) and 2^32 (exclusive).

  Pot.debug( Pot.hashCode('abc') ); // 96354
  Pot.debug( Pot.hashCode([0x61, 0x62, 0x63]) ); // 96354

Parameters:
{String|Array|*} data: A target data.

Returns:: {Number} Hash value for `string`, between 0 (inclusive) and 2^32 (exclusive). The empty string returns 0.

<static> {Function} Pot.Crypt.md5(data)

Calculate the MD5 hash of a string. RFC 1321 - The MD5 Message-Digest Algorithm

  debug(md5('apple'));
  // @results '1f3870be274f6c49b3e31a0c6728957f'

Parameters:
{String|Array} data: The target data.

Returns:: {String} The result string.

See:: http://www.faqs.org/rfcs/rfc1321

<static> {Function} Pot.Crypt.sha1(data)

Calculate the SHA1 hash of a string. RFC 3174 - US Secure Hash Algorithm 1 (SHA1)

  debug(sha1('apple'));
  // @results 'd0be2dc421be4fcd0172e5afceea3970e2f3d940'

Parameters:
{String|Array} data: The input data.

Returns:: {String} Returns the sha1 hash as a string.

See:: http://www.faqs.org/rfcs/rfc3174

Classes

Namespace Pot.Crypt