Android Utililty Methods DES Decrypt

List of utility methods to do DES Decrypt

  1. HOME
  2. Android
  3. D
  4. DES Decrypt

Description

The list of methods to do DES Decrypt are organized into topic(s).

Method

Stringdecrypt(String data, String key)
decrypt 
byte[] myKey = generateKey(key.getBytes());
SecretKeySpec spec = new SecretKeySpec(myKey, CIPHER_ALGORITHM);
Cipher cipher = Cipher.getInstance(CIPHER_ALGORITHM);
cipher.init(Cipher.DECRYPT_MODE, spec);
byte[] encryptedData = Base64.decode(data, Base64.DEFAULT);
byte[] decryptedData = cipher.doFinal(encryptedData);
String result = new String(decryptedData);
return result;
...
Stringdecode(String key, String data)
decode 
if (data == null)
    return null;
try {
    DESKeySpec dks = new DESKeySpec(key.getBytes());
    SecretKeyFactory keyFactory = SecretKeyFactory
            .getInstance("DES");
    Key secretKey = keyFactory.generateSecret(dks);
    Cipher cipher = Cipher.getInstance(ALGORITHM_DES);
...
byte[]desDecodeCBC(byte[] key, byte[] keyiv, byte[] data)
des Decode CBC 
Key deskey = null;
DESedeKeySpec spec = new DESedeKeySpec(key);
SecretKeyFactory keyfactory = SecretKeyFactory
        .getInstance("desede");
deskey = keyfactory.generateSecret(spec);
Cipher cipher = Cipher.getInstance("desede" + "/CBC/NoPadding");
IvParameterSpec ips = new IvParameterSpec(keyiv);
cipher.init(Cipher.DECRYPT_MODE, deskey, ips);
...
byte[]desDecodeECB(byte[] key, byte[] data)
des Decode ECB 
Key deskey = null;
DESedeKeySpec spec = new DESedeKeySpec(key);
SecretKeyFactory keyfactory = SecretKeyFactory
        .getInstance("desede");
deskey = keyfactory.generateSecret(spec);
Cipher cipher = Cipher.getInstance("desede" + "/ECB/NoPadding");
cipher.init(Cipher.DECRYPT_MODE, deskey);
byte[] bOut = cipher.doFinal(Base64.decode(data, Base64.DEFAULT));
...
StringdecryptDES(String decryptString, String decryptKey)
decrypt DES 
byte[] byteMi = String2Byte(decryptString);
IvParameterSpec zeroIv = new IvParameterSpec(iv);
SecretKeySpec key = new SecretKeySpec(decryptKey.getBytes(), "DES");
Cipher cipher = Cipher.getInstance("DES/CBC/PKCS5Padding");
cipher.init(Cipher.DECRYPT_MODE, key, zeroIv);
byte decryptedData[] = cipher.doFinal(byteMi);
return new String(decryptedData);
byte[]decryptDESFile(byte[] decryptData, String decryptKey)
decrypt DES File 
IvParameterSpec zeroIv = new IvParameterSpec(iv);
SecretKeySpec key = new SecretKeySpec(decryptKey.getBytes(), "DES");
Cipher cipher = Cipher.getInstance("DES/CBC/PKCS5Padding");
cipher.init(Cipher.DECRYPT_MODE, key, zeroIv);
byte decryptedResult[] = cipher.doFinal(decryptData);
return decryptedResult;
Stringdecode(String key, String data)
decode 
if (data == null)
    return null;
try {
    DESKeySpec dks = new DESKeySpec(key.getBytes());
    SecretKeyFactory keyFactory = SecretKeyFactory
            .getInstance("DES");
    Key secretKey = keyFactory.generateSecret(dks);
    Cipher cipher = Cipher.getInstance(ALGORITHM_DES);
...
byte[]decode(String key, byte[] data)
decode 
try {
    DESKeySpec dks = new DESKeySpec(key.getBytes());
    SecretKeyFactory keyFactory = SecretKeyFactory
            .getInstance("DES");
    Key secretKey = keyFactory.generateSecret(dks);
    Cipher cipher = Cipher.getInstance(ALGORITHM_DES);
    IvParameterSpec iv = new IvParameterSpec(key.getBytes());
    AlgorithmParameterSpec paramSpec = iv;
...
byte[]decrypt(byte[] key, byte[] src)
decrypt 
IvParameterSpec zeroIv = new IvParameterSpec(iv);
SecretKeySpec spec = new SecretKeySpec(key, "DES");
Cipher cipher = Cipher.getInstance("DES/CBC/PKCS5Padding");
cipher.init(Cipher.DECRYPT_MODE, spec, zeroIv);
return cipher.doFinal(src);
Stringencode(String key, String data)
encode 
if (data == null)
    return null;
try {
    DESKeySpec dks = new DESKeySpec(key.getBytes());
    SecretKeyFactory keyFactory = SecretKeyFactory
            .getInstance("DES");
    Key secretKey = keyFactory.generateSecret(dks);
    Cipher cipher = Cipher.getInstance(ALGORITHM_DES);
...