使用 java 对文件进行pgp加密的完整代码
时间: 2023-08-06 21:01:44 浏览: 79
以下是使用 Bouncy Castle 库实现 PGP 文件加密的 Java 代码示例:
```java
import java.io.*;
import java.security.*;
import java.security.interfaces.RSAPublicKey;
import java.util.Iterator;
import org.bouncycastle.bcpg.*;
import org.bouncycastle.bcpg.sig.*;
import org.bouncycastle.jce.provider.BouncyCastleProvider;
import org.bouncycastle.openpgp.*;
import org.bouncycastle.openpgp.operator.*;
import org.bouncycastle.openpgp.operator.bc.*;
public class PgpFileEncryptor {
private static final int BUFFER_SIZE = 4096;
public static void encryptFile(String inputFile, String outputFile, String publicKeyFile) throws IOException, NoSuchProviderException, PGPException, NoSuchAlgorithmException, InvalidKeyException {
// 加载 Bouncy Castle 提供程序
Security.addProvider(new BouncyCastleProvider());
// 读取公钥文件
InputStream keyIn = new FileInputStream(publicKeyFile);
PGPPublicKeyRingCollection keyRingCollection = new PGPPublicKeyRingCollection(PGPUtil.getDecoderStream(keyIn));
keyIn.close();
// 查找加密公钥
PGPPublicKey encryptionKey = null;
Iterator<PGPPublicKeyRing> keyRingIterator = keyRingCollection.getKeyRings();
while (encryptionKey == null && keyRingIterator.hasNext()) {
PGPPublicKeyRing keyRing = keyRingIterator.next();
Iterator<PGPPublicKey> keyIterator = keyRing.getPublicKeys();
while (encryptionKey == null && keyIterator.hasNext()) {
PGPPublicKey key = keyIterator.next();
if (key.isEncryptionKey()) {
encryptionKey = key;
}
}
}
// 抛出异常,如果找不到加密公钥
if (encryptionKey == null) {
throw new IllegalArgumentException("Can't find encryption key in key ring.");
}
// 创建输出流
OutputStream outputStream = new BufferedOutputStream(new FileOutputStream(outputFile));
// 初始化 PGP 加密器和输出流
PGPEncryptedDataGenerator encryptedDataGenerator = new PGPEncryptedDataGenerator(new JcePGPDataEncryptorBuilder(PGPEncryptedData.CAST5).setWithIntegrityPacket(true).setSecureRandom(new SecureRandom()).setProvider("BC"));
encryptedDataGenerator.addMethod(new JcePublicKeyKeyEncryptionMethodGenerator(encryptionKey).setProvider("BC"));
OutputStream encryptedOutputStream = encryptedDataGenerator.open(outputStream, new byte[BUFFER_SIZE]);
// 创建压缩器和输出流
PGPCompressedDataGenerator compressedDataGenerator = new PGPCompressedDataGenerator(PGPCompressedData.ZIP);
OutputStream compressedOutputStream = compressedDataGenerator.open(encryptedOutputStream);
// 创建字面数据包和输出流
PGPLiteralDataGenerator literalDataGenerator = new PGPLiteralDataGenerator();
OutputStream literalOutputStream = literalDataGenerator.open(compressedOutputStream, PGPLiteralData.BINARY, inputFile, new Date(), new byte[BUFFER_SIZE]);
// 读取输入文件并加密
InputStream inputFileStream = new BufferedInputStream(new FileInputStream(inputFile));
byte[] buffer = new byte[BUFFER_SIZE];
int bytesRead;
while ((bytesRead = inputFileStream.read(buffer)) != -1) {
literalOutputStream.write(buffer, 0, bytesRead);
}
// 关闭流
literalOutputStream.close();
literalDataGenerator.close();
compressedOutputStream.close();
compressedDataGenerator.close();
encryptedOutputStream.close();
encryptedDataGenerator.close();
outputStream.close();
inputFileStream.close();
}
}
```
此代码使用 CAST5 对称加密算法进行加密,并使用 PGP 数据格式。它需要提供公钥文件路径、输入文件路径和输出文件路径。
相关推荐
![rar](https://img-home.csdnimg.cn/images/20210720083606.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![zip](https://img-home.csdnimg.cn/images/20210720083736.png)
![pdf](https://img-home.csdnimg.cn/images/20210720083512.png)