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| /* | |
| Apex encryption | |
| String clearText = 'A sample message'; | |
| String key = 'b7zfYEKhkmVrl9P3yGN/p+3AOkjWK5D6s2JOJzW6lpo='; | |
| Blob cipherText = Crypto.encryptWithManagedIV('AES256', EncodingUtil.base64Decode(key), Blob.valueOf(clearText)); | |
| String encodedCipherText = EncodingUtil.base64Encode(cipherText); | |
| System.debug(key); | |
| System.debug(encodedCipherText); | |
| */ | |
| import javax.crypto.Cipher; | |
| import javax.crypto.spec.IvParameterSpec; | |
| import javax.crypto.spec.SecretKeySpec; | |
| import org.apache.commons.codec.binary.Base64; | |
| import java.util.Arrays; | |
| public class AESDecrypt { | |
| private static final String characterEncoding = "UTF-8"; | |
| private static final String cipherTransformation = "AES/CBC/PKCS5Padding"; | |
| private static final String aesEncryptionAlgorithm = "AES"; | |
| public static byte[] decryptBase64EncodedWithManagedIV(String encryptedText, String key) throws Exception { | |
| byte[] cipherText = Base64.decodeBase64(encryptedText.getBytes()); | |
| byte[] keyBytes = Base64.decodeBase64(key.getBytes()); | |
| return decryptWithManagedIV(cipherText, keyBytes); | |
| } | |
| public static byte[] decryptWithManagedIV(byte[] cipherText, byte[] key) throws Exception { | |
| byte[] initialVector = Arrays.copyOfRange(cipherText, 0, 16); | |
| byte[] trimmedCipherText = Arrays.copyOfRange(cipherText, 16, cipherText.length); | |
| return decrypt(trimmedCipherText, key, initialVector); | |
| } | |
| public static byte[] decrypt(byte[] cipherText, byte[] key, byte[] initialVector) throws Exception { | |
| Cipher cipher = Cipher.getInstance(cipherTransformation); | |
| SecretKeySpec secretKeySpecy = new SecretKeySpec(key, aesEncryptionAlgorithm); | |
| IvParameterSpec ivParameterSpec = new IvParameterSpec(initialVector); | |
| cipher.init(Cipher.DECRYPT_MODE, secretKeySpecy, ivParameterSpec); | |
| cipherText = cipher.doFinal(cipherText); | |
| return cipherText; | |
| } | |
| public static void main(String args[]) throws Exception { | |
| byte[] clearText = decryptBase64EncodedWithManagedIV( | |
| "shZiijRRaNy8HSDcZeAwYELhBltiBrInSz0MH/F7Ol23VHmJmm3QD1xOMQqaN4FP", | |
| "b7zfYEKhkmVrl9P3yGN/p+3AOkjWK5D6s2JOJzW6lpo="); | |
| System.out.println("ClearText:" + new String(clearText, characterEncoding)); | |
| } | |
| } |
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