/**
* This module provides convenient client side access to YQL's crypto functions.
* @module gallery-yql-crypto
*/
(function (Y) {
'use strict';
var _base64Decode = Y.Base64.decode,
_execute = Y.YQL.execute,
_getResult = _execute.getResult,
_hash,
_hmac,
_bind = Y.bind,
_toHex;
_hash = function (hash, b64, string, callbackFunction, params, opts) {
_execute('response.object = y.crypto.encode' + hash + '("' + String(string || '').replace(/"/g, '\\"') + '");', function (result) {
if (b64) {
callbackFunction(_getResult(result));
} else {
callbackFunction(_toHex(_base64Decode(_getResult(result))));
}
}, params, opts);
};
_hmac = function (hash, b64, string, secret, callbackFunction, params, opts) {
_execute('response.object = y.crypto.encode' + hash + '("' + String(secret || '').replace(/"/g, '\\"') + '", "' + String(string || '').replace(/"/g, '\\"') + '");', function (result) {
if (b64) {
callbackFunction(_getResult(result));
} else {
callbackFunction(_toHex(_base64Decode(_getResult(result))));
}
}, params, opts);
};
_toHex = function (string) {
var hex = '',
i,
length,
value;
for (i = 0, length = string.length; i < length; i += 1) {
value = string.charCodeAt(i).toString(16);
if (value.length < 2) {
value = '0' + value;
}
hex += value;
}
return hex;
};
/**
* @class YQLCrypto
* @static
*/
Y.YQLCrypto = {
/**
* This method wraps the YQL execute data table which executes inline
* Javascript on the YQL server. YQL Server side Javascript
* documentation is here:
* http://developer.yahoo.com/yql/guide/yql-javascript-objects.html
* @method execute
* @param {String} code Javascript code to execute on the YQL server.
* @param {Function} callbackFunction Passes through to Y.YQL.
* @param {Object} params (optional) Passes through to Y.YQL.
* @param {Object} opts (optional) Passes through to Y.YQL.
*/
execute: _execute,
/**
* Generates a sha1 hash-based message authentication code.
* The result is expressed as a hex value.
* @method hmacSha1
* @param {String} string The message to hash.
* @param {String} secret The secret key.
* @param {Function} callbackFunction The result value is the only
* parameter.
* @param {Object} params (optional) Passes through to Y.YQL.
* @param {Object} opts (optional) Passes through to Y.YQL.
*/
hmacSha1: _bind(_hmac, null, 'HmacSHA1', false),
/**
* Generates a sha1 hash-based message authentication code.
* The result is expressed as a base 64 encoded value.
* @method hmacSha1_b64
* @param {String} string The message to hash.
* @param {String} secret The secret key.
* @param {Function} callbackFunction The result value is the only
* parameter.
* @param {Object} params (optional) Passes through to Y.YQL.
* @param {Object} opts (optional) Passes through to Y.YQL.
*/
hmacSha1_b64: _bind(_hmac, null, 'HmacSHA1', true),
/**
* Generates a sha256 hash-based message authentication code.
* The result is expressed as a hex value.
* @method hmacSha256
* @param {String} string The message to hash.
* @param {String} secret The secret key.
* @param {Function} callbackFunction The result value is the only
* parameter.
* @param {Object} params (optional) Passes through to Y.YQL.
* @param {Object} opts (optional) Passes through to Y.YQL.
*/
hmacSha256: _bind(_hmac, null, 'HmacSHA256', false),
/**
* Generates a sha256 hash-based message authentication code.
* The result is expressed as a base 64 encoded value.
* @method hmacSha256_b64
* @param {String} string The message to hash.
* @param {String} secret The secret key.
* @param {Function} callbackFunction The result value is the only
* parameter.
* @param {Object} params (optional) Passes through to Y.YQL.
* @param {Object} opts (optional) Passes through to Y.YQL.
*/
hmacSha256_b64: _bind(_hmac, null, 'HmacSHA256', true),
/**
* Generates an md5 hash.
* The result is expressed as a hex value.
* @method md5
* @param {String} string The message to hash.
* @param {Function} callbackFunction The result value is the only
* parameter.
* @param {Object} params (optional) Passes through to Y.YQL.
* @param {Object} opts (optional) Passes through to Y.YQL.
*/
md5: _bind(_hash, null, 'Md5', false),
/**
* Generates an md5 hash.
* The result is expressed as a base 64 encoded value.
* @method md5_b64
* @param {String} string The message to hash.
* @param {Function} callbackFunction The result value is the only
* parameter.
* @param {Object} params (optional) Passes through to Y.YQL.
* @param {Object} opts (optional) Passes through to Y.YQL.
*/
md5_b64: _bind(_hash, null, 'Md5', true),
/**
* Generates a sha1 hash.
* The result is expressed as a hex value.
* @method sha1
* @param {String} string The message to hash.
* @param {Function} callbackFunction The result value is the only
* parameter.
* @param {Object} params (optional) Passes through to Y.YQL.
* @param {Object} opts (optional) Passes through to Y.YQL.
*/
sha1: _bind(_hash, null, 'Sha', false),
/**
* Generates a sha1 hash.
* The result is expressed as a base 64 encoded value.
* @method sha1_b64
* @param {String} string The message to hash.
* @param {Function} callbackFunction The result value is the only
* parameter.
* @param {Object} params (optional) Passes through to Y.YQL.
* @param {Object} opts (optional) Passes through to Y.YQL.
*/
sha1_b64: _bind(_hash, null, 'Sha', true),
/**
* Generates a universally unique identifier.
* @method uuid
* @param {Function} callbackFunction The result value is the only
* parameter.
* @param {Object} params (optional) Passes through to Y.YQL.
* @param {Object} opts (optional) Passes through to Y.YQL.
*/
uuid: function (callbackFunction, params, opts) {
_execute('response.object = y.crypto.uuid();', function (result) {
callbackFunction(_getResult(result));
}, params, opts);
}
};
}(Y));
