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Removing this piece of code as been moved to a new module. (#10820)

This commit is contained in:
Bhabani Prasad Patel 2021-05-29 16:53:38 +05:30 committed by GitHub
parent 85270f466f
commit 8eb252eae6
2 changed files with 0 additions and 97 deletions
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53
core-java-modules/core-java-security-2/src/main/java/com/baeldung/secretkeyandstringconversion/ConversionClassUtil.java
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@ -1,53 +0,0 @@
package com.baeldung.secretkeyandstringconversion;
import java.security.NoSuchAlgorithmException;
import java.security.spec.InvalidKeySpecException;
import java.security.spec.KeySpec;
import java.util.Base64;
import javax.crypto.KeyGenerator;
import javax.crypto.SecretKey;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.PBEKeySpec;
import javax.crypto.spec.SecretKeySpec;
public class ConversionClassUtil {
/* Generating Secret key */
// Generating Secret Key using KeyGenerator class with 256
public static SecretKey generateKey(int n) throws NoSuchAlgorithmException {
KeyGenerator keyGenerator = KeyGenerator.getInstance("AES");
keyGenerator.init(n);
SecretKey originalKey = keyGenerator.generateKey();
return originalKey;
}
// Generating Secret Key using password and salt
public static SecretKey getKeyFromPassword(String password, String salt)
throws NoSuchAlgorithmException, InvalidKeySpecException {
SecretKeyFactory factory = SecretKeyFactory.getInstance("PBKDF2WithHmacSHA256");
KeySpec spec = new PBEKeySpec(password.toCharArray(), salt.getBytes(), 65536, 256);
SecretKey originalKey = new SecretKeySpec(factory.generateSecret(spec).getEncoded(), "AES");
return originalKey;
}
/* Converting Secret key into String */
public static String convertSecretKeyToString(SecretKey secretKey) throws NoSuchAlgorithmException {
// Converting the Secret Key into byte array
byte[] rawData = secretKey.getEncoded();
// Getting String - Base64 encoded version of the Secret Key
String encodedKey = Base64.getEncoder().encodeToString(rawData);
return encodedKey;
}
/* Converting String into Secret key into */
public static SecretKey convertStringToSecretKeyto(String encodedKey) {
// Decoding the Base64 encoded string into byte array
byte[] decodedKey = Base64.getDecoder().decode(encodedKey);
// Rebuilding the Secret Key using SecretKeySpec Class
SecretKey originalKey = new SecretKeySpec(decodedKey, 0, decodedKey.length, "AES");
return originalKey;
}
}

44
core-java-modules/core-java-security-2/src/test/java/com/baeldung/secretkeyandstringconversion/ConversionClassUtilUnitTest.java
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package com.baeldung.secretkeyandstringconversion;
import java.security.NoSuchAlgorithmException;
import java.security.spec.InvalidKeySpecException;
import javax.crypto.SecretKey;
import org.junit.jupiter.api.Assertions;
import org.junit.jupiter.api.Test;
public class ConversionClassUtilUnitTest {
@Test
void givenPasswordAndSalt_whenCreateSecreKeyCheckConversion_thenSuccess()
throws NoSuchAlgorithmException, InvalidKeySpecException {
// given
String password = "Baeldung@2021";
String salt = "@$#baelDunG@#^$*";
// when
SecretKey encodedKey = ConversionClassUtil.getKeyFromPassword(password, salt);
String encodedString = ConversionClassUtil.convertSecretKeyToString(encodedKey);
SecretKey decodeKey = ConversionClassUtil.convertStringToSecretKeyto(encodedString);
// then
Assertions.assertEquals(encodedKey, decodeKey);
}
@Test
void givenSize_whenCreateSecreKeyCheckConversion_thenSuccess()
throws NoSuchAlgorithmException, InvalidKeySpecException {
// given
int size = 256;
// when
SecretKey encodedKey = ConversionClassUtil.generateKey(size);
String encodedString = ConversionClassUtil.convertSecretKeyToString(encodedKey);
SecretKey decodeKey = ConversionClassUtil.convertStringToSecretKeyto(encodedString);
// then
Assertions.assertEquals(encodedKey, decodeKey);
}
}