///
declare module goog.crypt.pbkdf2 {
/**
* Derives key from password using PBKDF2-SHA1
* @param {!Array.} password Byte array representation of the password
* from which the key is derived.
* @param {!Array.} initialSalt Byte array representation of the salt.
* @param {number} iterations Number of interations when computing the key.
* @param {number} keyLength Length of the output key in bits.
* Must be multiple of 8.
* @return {!Array.} Byte array representation of the output key.
*/
function deriveKeySha1(password: number[], initialSalt: number[], iterations: number, keyLength: number): number[];
}