crypto/src/main/java/org/springframework/security/crypto/encrypt/CipherUtils.java
public static void initCipher(Cipher cipher, int mode, SecretKey secretKey,
			byte[] salt, int iterationCount) {
		initCipher(cipher, mode, secretKey, new PBEParameterSpec(salt, iterationCount));
	}
public static void initCipher(Cipher cipher, int mode, SecretKey secretKey,
			byte[] salt, int iterationCount) {
		initCipher(cipher, mode, secretKey, new PBEParameterSpec(salt, iterationCount));
	}
Initializes the Cipher for use.