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/*-
* ============LICENSE_START=======================================================
* SDC
* ================================================================================
* Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
* ================================================================================
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
* ============LICENSE_END=========================================================
*/
package org.onap.sdc.security;
import static java.nio.charset.StandardCharsets.UTF_8;
import fj.data.Either;
import java.io.UnsupportedEncodingException;
import java.security.InvalidKeyException;
import java.security.Key;
import java.security.NoSuchAlgorithmException;
import java.util.Base64;
import javax.crypto.BadPaddingException;
import javax.crypto.Cipher;
import javax.crypto.IllegalBlockSizeException;
import javax.crypto.NoSuchPaddingException;
import javax.crypto.spec.SecretKeySpec;
import org.onap.sdc.security.logging.enums.EcompLoggerErrorCode;
import org.onap.sdc.security.logging.wrappers.Logger;
public class SecurityUtil {
private static final Logger LOG = Logger.getLogger(SecurityUtil.class);
private static final byte[] KEY =
new byte[] {-64, 5, -32, -117, -44, 8, -39, 1, -9, 36, -46, -81, 62, -15, -63, -75};
public static final SecurityUtil INSTANCE = new SecurityUtil();
public static final String ALGORITHM = "AES";
public static final String CHARSET = UTF_8.name();
public static Key secKey = null;
/**
* cmd commands >$PROGRAM_NAME decrypt "$ENCRYPTED_MSG"
* >$PROGRAM_NAME encrypt "message"
**/
private SecurityUtil() {
}
static {
try {
secKey = generateKey(KEY, ALGORITHM);
} catch (Exception e) {
LOG.warn(EcompLoggerErrorCode.PERMISSION_ERROR,"cannot generate key for {}", ALGORITHM);
}
}
public static Key generateKey(final byte[] KEY, String algorithm) {
return new SecretKeySpec(KEY, algorithm);
}
//obfuscates key prefix -> **********
public String obfuscateKey(String sensitiveData) {
if (sensitiveData == null) {
return null;
}
int len = sensitiveData.length();
StringBuilder builder = new StringBuilder(sensitiveData);
for (int i = 0; i < len / 2; i++) {
builder.setCharAt(i, '*');
}
return builder.toString();
}
/**
* @param strDataToEncrypt - plain string to encrypt
* Encrypt the Data
* a. Declare / Initialize the Data. Here the data is of type String
* b. Convert the Input Text to Bytes
* c. Encrypt the bytes using doFinal method
*/
public Either<String, String> encrypt(String strDataToEncrypt) {
if (strDataToEncrypt != null) {
try {
LOG.debug("Encrypt key -> {}", secKey);
Cipher aesCipherForEncryption = Cipher.getInstance(
"AES"); // Must specify the mode explicitly as most JCE providers default to ECB mode!!
aesCipherForEncryption.init(Cipher.ENCRYPT_MODE, secKey);
byte[] byteDataToEncrypt = strDataToEncrypt.getBytes();
byte[] byteCipherText = aesCipherForEncryption.doFinal(byteDataToEncrypt);
String strCipherText = new String(Base64.getMimeEncoder().encode(byteCipherText), CHARSET);
LOG.debug("Cipher Text generated using AES is {}", strCipherText);
return Either.left(strCipherText);
} catch (NoSuchAlgorithmException | UnsupportedEncodingException e) {
LOG.warn(EcompLoggerErrorCode.PERMISSION_ERROR,
"cannot encrypt data unknown algorithm or missing encoding for {}", secKey.getAlgorithm());
} catch (InvalidKeyException e) {
LOG.warn(EcompLoggerErrorCode.PERMISSION_ERROR, "invalid key recieved - > {} | {}",
new String(Base64.getDecoder().decode(secKey.getEncoded())), e.getMessage());
} catch (IllegalBlockSizeException | BadPaddingException | NoSuchPaddingException e) {
LOG.warn(EcompLoggerErrorCode.PERMISSION_ERROR,
"bad algorithm definition (Illegal Block Size or padding), please review you algorithm block&padding",
e.getMessage());
}
}
return Either.right("Cannot encrypt " + strDataToEncrypt);
}
/**
* Decrypt the Data
*
* @param byteCipherText - should be valid bae64 input in the length of 16bytes
* @param isBase64Decoded - is data already base64 encoded&aligned to 16 bytes
* a. Initialize a new instance of Cipher for Decryption (normally don't reuse the same
* object)
* b. Decrypt the cipher bytes using doFinal method
*/
public Either<String, String> decrypt(byte[] byteCipherText, boolean isBase64Decoded) {
if (byteCipherText != null) {
byte[] alignedCipherText = byteCipherText;
try {
if (isBase64Decoded) {
alignedCipherText = Base64.getDecoder().decode(byteCipherText);
}
LOG.debug("Decrypt key -> " + secKey.getEncoded());
Cipher aesCipherForDecryption = Cipher.getInstance(
"AES"); // Must specify the mode explicitly as most JCE providers default to ECB mode!!
aesCipherForDecryption.init(Cipher.DECRYPT_MODE, secKey);
byte[] byteDecryptedText = aesCipherForDecryption.doFinal(alignedCipherText);
String strDecryptedText = new String(byteDecryptedText);
LOG.debug("Decrypted Text message is: {}", obfuscateKey(strDecryptedText));
return Either.left(strDecryptedText);
} catch (NoSuchAlgorithmException e) {
LOG.warn(EcompLoggerErrorCode.PERMISSION_ERROR,
"cannot encrypt data unknown algorithm or missing encoding for {}", secKey.getAlgorithm());
} catch (InvalidKeyException e) {
LOG.warn(EcompLoggerErrorCode.PERMISSION_ERROR, "invalid key recieved - > {} | {}",
new String(Base64.getDecoder().decode(secKey.getEncoded())), e.getMessage());
} catch (IllegalBlockSizeException | BadPaddingException | NoSuchPaddingException e) {
LOG.warn(EcompLoggerErrorCode.PERMISSION_ERROR,
"bad algorithm definition (Illegal Block Size or padding), please review you algorithm block&padding",
e.getMessage());
}
}
return Either.right("Decrypt FAILED");
}
public Either<String, String> decrypt(String byteCipherText) {
try {
return decrypt(byteCipherText.getBytes(CHARSET), true);
} catch (UnsupportedEncodingException e) {
LOG.warn(EcompLoggerErrorCode.PERMISSION_ERROR, "Missing encoding for {} | {} ", secKey.getAlgorithm(),
e.getMessage());
}
return Either.right("Decrypt FAILED");
}
}
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