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public class CryptData {
private KeySpec keySpec;
private SecretKey key;
private IvParameterSpec iv;
public CryptData(String keyString, String ivString) {
try {
final MessageDigest md = MessageDigest.getInstance("md5");
final byte[] digestOfPassword = md.digest(Base64
.decodeBase64(keyString.getBytes("utf-8")));
final byte[] keyBytes = Arrays.copyOf(digestOfPassword, 24);
for (int j = 0, k = 16; j < 8;) {
keyBytes[k++] = keyBytes[j++];
}
keySpec = new DESedeKeySpec(keyBytes);
key = SecretKeyFactory.getInstance("DESede")
.generateSecret(keySpec);
iv = new IvParameterSpec(ivString.getBytes());
} catch (Exception e) {
e.printStackTrace();
}
}
public String encrypt(String value) {
try {
Cipher ecipher = Cipher.getInstance("DESede/CFB/PKCS5Padding",
"SunJCE");
ecipher.init(Cipher.ENCRYPT_MODE, key, iv);
if (value == null)
return null;
// Encode the string into bytes using utf-8
byte[] utf8 = value.getBytes("UTF8");
// Encrypt
byte[] enc = ecipher.doFinal(utf8);
// Encode bytes to base64 to get a string
return new String(Base64.encodeBase64(enc), "UTF-8");
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
} |
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