在Java中,使用PKCS#1和PKCS#8进行加密和解密操作,你可以使用java.security
包中的Cipher
类。以下是使用这两种标准进行加密和解密的示例代码:
import javax.crypto.Cipher;
import javax.crypto.KeyGenerator;
import javax.crypto.SecretKey;
import java.security.NoSuchAlgorithmException;
import java.util.Base64;
public class PKCS1Encryption {
public static void main(String[] args) throws NoSuchAlgorithmException {
// 生成RSA密钥对
KeyGenerator keyGenerator = KeyGenerator.getInstance("RSA");
keyGenerator.init(2048);
SecretKey secretKey = keyGenerator.generateKey();
// 使用PKCS#1填充模式进行加密
Cipher cipher = Cipher.getInstance("RSA");
cipher.init(Cipher.ENCRYPT_MODE, secretKey);
String plainText = "Hello, World!";
byte[] encryptedBytes = cipher.doFinal(plainText.getBytes());
// 输出加密后的Base64编码字符串
System.out.println("Encrypted text: " + Base64.getEncoder().encodeToString(encryptedBytes));
}
}
import javax.crypto.Cipher;
import javax.crypto.SecretKey;
import java.security.NoSuchAlgorithmException;
import java.util.Base64;
public class PKCS1Decryption {
public static void main(String[] args) throws NoSuchAlgorithmException {
// 生成RSA密钥对(与加密时使用相同的密钥)
KeyGenerator keyGenerator = KeyGenerator.getInstance("RSA");
keyGenerator.init(2048);
SecretKey secretKey = keyGenerator.generateKey();
// 使用PKCS#1填充模式进行解密
Cipher cipher = Cipher.getInstance("RSA");
cipher.init(Cipher.DECRYPT_MODE, secretKey);
String encryptedText = "Base64EncodedEncryptedText"; // 替换为实际的加密后的Base64编码字符串
byte[] encryptedBytes = Base64.getDecoder().decode(encryptedText);
byte[] decryptedBytes = cipher.doFinal(encryptedBytes);
// 输出解密后的文本
System.out.println("Decrypted text: " + new String(decryptedBytes));
}
}
import javax.crypto.Cipher;
import javax.crypto.KeyGenerator;
import javax.crypto.SecretKey;
import javax.crypto.spec.PKCS8EncodedKeySpec;
import java.security.NoSuchAlgorithmException;
import java.util.Base64;
public class PKCS8Encryption {
public static void main(String[] args) throws NoSuchAlgorithmException {
// 生成RSA密钥对
KeyGenerator keyGenerator = KeyGenerator.getInstance("RSA");
keyGenerator.init(2048);
SecretKey secretKey = keyGenerator.generateKey();
// 将密钥转换为PKCS#8编码格式
PKCS8EncodedKeySpec keySpec = new PKCS8EncodedKeySpec(secretKey.getEncoded());
// 使用PKCS#8填充模式进行加密(注意:这里需要使用一个支持PKCS#8的加密算法,如AES)
Cipher cipher = Cipher.getInstance("AES");
cipher.init(Cipher.ENCRYPT_MODE, secretKey);
String plainText = "Hello, World!";
byte[] encryptedBytes = cipher.doFinal(plainText.getBytes());
// 输出加密后的Base64编码字符串
System.out.println("Encrypted text: " + Base64.getEncoder().encodeToString(encryptedBytes));
}
}
import javax.crypto.Cipher;
import javax.crypto.KeyGenerator;
import javax.crypto.SecretKey;
import javax.crypto.spec.PKCS8EncodedKeySpec;
import java.security.NoSuchAlgorithmException;
import java.util.Base64;
public class PKCS8Decryption {
public static void main(String[] args) throws NoSuchAlgorithmException {
// 生成RSA密钥对
KeyGenerator keyGenerator = KeyGenerator.getInstance("RSA");
keyGenerator.init(2048);
SecretKey secretKey = keyGenerator.generateKey();
// 将密钥转换为PKCS#8编码格式
PKCS8EncodedKeySpec keySpec = new PKCS8EncodedKeySpec(secretKey.getEncoded());
// 使用