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close #4204
This commit is contained in:
acbin
2023-06-09 18:52:05 +08:00
committed by GitHub
parent ad03086f54
commit 00282efd8b
521 changed files with 5233 additions and 7309 deletions
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20
src/main/java/com/thealgorithms/ciphers/AESEncryption.java
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@ -1,10 +1,10 @@
package com.thealgorithms.ciphers;
import java.security.InvalidAlgorithmParameterException;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import javax.crypto.*;
import javax.crypto.spec.GCMParameterSpec;
import java.security.InvalidAlgorithmParameterException;
/**
* This example program shows how AES encryption and decryption can be done in
@ -29,12 +29,8 @@ public class AESEncryption {
String decryptedText = decryptText(cipherText, secKey);
System.out.println("Original Text:" + plainText);
System.out.println(
"AES Key (Hex Form):" + bytesToHex(secKey.getEncoded())
);
System.out.println(
"Encrypted Text (Hex Form):" + bytesToHex(cipherText)
);
System.out.println("AES Key (Hex Form):" + bytesToHex(secKey.getEncoded()));
System.out.println("Encrypted Text (Hex Form):" + bytesToHex(cipherText));
System.out.println("Descrypted Text:" + decryptedText);
}
@ -45,8 +41,7 @@ public class AESEncryption {
* @return secKey (Secret key that we encrypt using it)
* @throws NoSuchAlgorithmException (from KeyGenrator)
*/
public static SecretKey getSecretEncryptionKey()
throws NoSuchAlgorithmException {
public static SecretKey getSecretEncryptionKey() throws NoSuchAlgorithmException {
KeyGenerator aesKeyGenerator = KeyGenerator.getInstance("AES");
aesKeyGenerator.init(128); // The AES key size in number of bits
return aesKeyGenerator.generateKey();
@ -63,7 +58,8 @@ public class AESEncryption {
* @throws IllegalBlockSizeException (from Cipher)
*/
public static byte[] encryptText(String plainText, SecretKey secKey)
throws NoSuchAlgorithmException, NoSuchPaddingException, InvalidKeyException, IllegalBlockSizeException, BadPaddingException {
throws NoSuchAlgorithmException, NoSuchPaddingException, InvalidKeyException,
IllegalBlockSizeException, BadPaddingException {
// AES defaults to AES/ECB/PKCS5Padding in Java 7
aesCipher = Cipher.getInstance("AES/GCM/NoPadding");
aesCipher.init(Cipher.ENCRYPT_MODE, secKey);
@ -76,8 +72,8 @@ public class AESEncryption {
* @return plainText
*/
public static String decryptText(byte[] byteCipherText, SecretKey secKey)
throws NoSuchAlgorithmException, NoSuchPaddingException, InvalidKeyException,
IllegalBlockSizeException, BadPaddingException, InvalidAlgorithmParameterException {
throws NoSuchAlgorithmException, NoSuchPaddingException, InvalidKeyException,
IllegalBlockSizeException, BadPaddingException, InvalidAlgorithmParameterException {
// AES defaults to AES/ECB/PKCS5Padding in Java 7
Cipher decryptionCipher = Cipher.getInstance("AES/GCM/NoPadding");
GCMParameterSpec gcmParameterSpec = new GCMParameterSpec(128, aesCipher.getIV());