[JAVA] SpringSecurity TextEncryptor: Common key encryption / decryption

Introduction

Encryption and decryption are frequently used processes, and Spring Security has a convenient interface and is easy to use, so let's create a sample.

Encryption / decryption interface

For text: org.springframework.security.crypto.encrypt.TextEncryptor For byte array: org.springframework.security.crypto.encrypt.BytesEncryptor

Random number generation interface

For text: org.springframework.security.crypto.keygen.StringKeyGenerator For byte array: org.springframework.security.crypto.keygen.BytesKeyGenerator

sample

package sample.security;

import java.util.Base64;

import org.apache.commons.codec.binary.Hex;
import org.springframework.security.crypto.encrypt.BytesEncryptor;
import org.springframework.security.crypto.encrypt.Encryptors;
import org.springframework.security.crypto.encrypt.TextEncryptor;
import org.springframework.security.crypto.keygen.KeyGenerators;

public class Test {

	public static void main(String[] args) {

		//Plaintext
		String orginalText = "I like ◯◯.";

		//Common key
		String encryptSecrerKey = "GOV2dkHGQcE1ZcX8";

		//Salt: Random number generation
		byte[] bytes = KeyGenerators.secureRandom(16).generateKey();
		String salt = new String(Hex.encodeHexString(bytes));

		//CBC method
		TextEncryptor cbcTextEncryptor = Encryptors.text(orginalText, salt);
		//encryption
		String encryptedCbcData = cbcTextEncryptor.encrypt(orginalText);
		System.out.println("Encrypted result (AES-CBC)： " + encryptedCbcData);
		//Decryption
		String decryptedCbcData = cbcTextEncryptor.decrypt(encryptedCbcData);
		System.out.println("Decrypted result (AES-CBC)： " + decryptedCbcData);

		//GCM method
		TextEncryptor aesGcmTextEncryptor = Encryptors.delux(encryptSecrerKey, salt);
		//encryption
		String encryptedData = aesGcmTextEncryptor.encrypt(orginalText);
		System.out.println("Encrypted result (AES-GCM)： " + encryptedData);
		//Decryption
		String decryptedData = aesGcmTextEncryptor.decrypt(encryptedData);
		System.out.println("Decrypted result (AES-GCM)： " + decryptedData);

		//binary(CBC)
		BytesEncryptor binaryEncryptor = Encryptors.standard(encryptSecrerKey, salt);
		//encryption
		String encryptedBinaryData = Base64.getEncoder()
				.encodeToString(binaryEncryptor.encrypt(orginalText.getBytes()));
		System.out.println("Encrypted result (binary CBC)： " + encryptedBinaryData);
		//Decryption
		byte[] decryptedBinaryData = binaryEncryptor.decrypt(Base64.getDecoder().decode(encryptedBinaryData));
		System.out.println("Decrypted result (binary CBC)： " + new String(decryptedBinaryData));

		//binary(GCM)
		BytesEncryptor aesGcmBinaryEncryptor = Encryptors.stronger(encryptSecrerKey, salt);
		//encryption
		String gcmEncryptedBinaryData = Base64.getEncoder()
				.encodeToString(aesGcmBinaryEncryptor.encrypt(orginalText.getBytes()));
		System.out.println("Encrypted result (binary GCM)： " + gcmEncryptedBinaryData);
		//Decryption
		byte[] gcmDecryptedBinaryData = binaryEncryptor.decrypt(Base64.getDecoder().decode(encryptedBinaryData));
		System.out.println("Decrypted result (binary GCM)： " + new String(gcmDecryptedBinaryData));
	}
}

Execution result example:

Encrypted result (AES-CBC): a34e20774314b85322de3eaf6c10f6990befe353d382cc449039524ffb7042b442f2a7a00beeddc94c8ad1495f6a0fba Decrypted result (AES-CBC): I like ◯◯. Encrypted result (AES-GCM): 1f5c89aeabf9f05a3cb286d1eca6e06ecd3259e9e52cea96d80e41d60614e436657317b7e69ad5b3e8672adaadd2434af69cbd36b516462908bef26d1ecf Decrypted result (AES-GCM): I like ◯◯. Encrypted result (binary CBC): zQg1LujXz6lpMwVoqNvG + ETtDbEC / LE0kq1LKJ + 4d8ntbPDHDsAC0e5w6Eym7Hps Decrypted result (binary CBC): I like ◯◯. Encrypted result (binary GCM): gSFtQJCV0OSkjdg8sf + WHxYAFIdZrgb6MFWsPTmzau67lzFVW + ZJP36bWPQQ0p8 / QZ9FIgQ7isZm4fIYt1g = Decrypted result (binary GCM): I like ◯◯.

Reference: https://docs.spring.io/spring-security/site/docs/5.2.1.RELEASE/reference/htmlsingle/#spring-security-crypto-encryption-text

that's all