C＃如何使用PGP公钥简单地加密文本文件？

我已经研究了一些关于如何实现我在问题中所说的内容并找到了几个API，但大多数API看起来非常复杂，因为我只是在这方面的一个noobie我只想要一个简单的方法，如：

public String Encrypt(String message, PublicKey publicKey) 

不知道这是否可以做到？ 如果没有那么请有人开导我另一种方式来实现这个:)

谢谢。

更新：

到目前为止，我只看到OpenPGP加密的所有库都需要公钥和私钥才能进行加密，而我只想用公钥加密（因为我没有私钥来使用它） ！

Answer 1

我在这里找到了一个教程，但它需要密钥和公钥来加密数据。 然而，我已经修改了一些代码只需要公钥（没有签名，没有压缩），并认为我应该在这里发布它，以防有人也在寻找这个问题的解决方案。 Belows是修改后的代码，作者的所有学分 – 金先生。

 public class PgpEncrypt { private PgpEncryptionKeys m_encryptionKeys; private const int BufferSize = 0x10000; /// 
 /// Instantiate a new PgpEncrypt class with initialized PgpEncryptionKeys. /// 
 ///  /// encryptionKeys is null public PgpEncrypt(PgpEncryptionKeys encryptionKeys) { if (encryptionKeys == null) { throw new ArgumentNullException("encryptionKeys", "encryptionKeys is null."); } m_encryptionKeys = encryptionKeys; } /// 
 /// Encrypt and sign the file pointed to by unencryptedFileInfo and /// write the encrypted content to outputStream. /// 
 /// The stream that will contain the /// encrypted data when this method returns. /// FileInfo of the file to encrypt public void Encrypt(Stream outputStream, FileInfo unencryptedFileInfo) { if (outputStream == null) { throw new ArgumentNullException("outputStream", "outputStream is null."); } if (unencryptedFileInfo == null) { throw new ArgumentNullException("unencryptedFileInfo", "unencryptedFileInfo is null."); } if (!File.Exists(unencryptedFileInfo.FullName)) { throw new ArgumentException("File to encrypt not found."); } using (Stream encryptedOut = ChainEncryptedOut(outputStream)) { using (Stream literalOut = ChainLiteralOut(encryptedOut, unencryptedFileInfo)) using (FileStream inputFile = unencryptedFileInfo.OpenRead()) { WriteOutput(literalOut, inputFile); } } } private static void WriteOutput(Stream literalOut, FileStream inputFile) { int length = 0; byte[] buf = new byte[BufferSize]; while ((length = inputFile.Read(buf, 0, buf.Length)) > 0) { literalOut.Write(buf, 0, length); } } private Stream ChainEncryptedOut(Stream outputStream) { PgpEncryptedDataGenerator encryptedDataGenerator; encryptedDataGenerator = new PgpEncryptedDataGenerator(SymmetricKeyAlgorithmTag.TripleDes, new SecureRandom()); encryptedDataGenerator.AddMethod(m_encryptionKeys.PublicKey); return encryptedDataGenerator.Open(outputStream, new byte[BufferSize]); } private static Stream ChainLiteralOut(Stream encryptedOut, FileInfo file) { PgpLiteralDataGenerator pgpLiteralDataGenerator = new PgpLiteralDataGenerator(); return pgpLiteralDataGenerator.Open(encryptedOut, PgpLiteralData.Binary, file); } } 

当然要运行这些代码，您必须在项目中包含BouncyCastle库 。
我已经测试过加密然后解密，它运行正常:)

Answer 2

你看过bouncycastle pgp了吗？ http://www.bouncycastle.org/

这里有一个源代码示例，用于获取从BouncyCastle站点获取的文件： 需要C＃中的BouncyCastle PGP文件加密示例

Answer 3

这可能是一种更清洁的方法：

---

  var pkr = asciiPublicKeyToRing(ascfilein); if (pkr != null) { try { EncryptFile( tbUnencryptedFile.Text, tbEncryptedFile.Text, getFirstPublicEncryptionKeyFromRing(pkr), true, true); MessageBox.Show("File Encrypted."); } catch (Exception ex) { MessageBox.Show("Error: " + ex.Message); } } else { MessageBox.Show(ascfilein + " is not a public key."); } 

---

  private PgpPublicKeyRing asciiPublicKeyToRing(string ascfilein) { using (Stream pubFis = File.OpenRead(ascfilein)) { var pubArmoredStream = new ArmoredInputStream(pubFis); PgpObjectFactory pgpFact = new PgpObjectFactory(pubArmoredStream); Object opgp = pgpFact.NextPgpObject(); var pkr = opgp as PgpPublicKeyRing; return pkr; } } private PgpPublicKey getFirstPublicEncryptionKeyFromRing(PgpPublicKeyRing pkr) { foreach (PgpPublicKey k in pkr.GetPublicKeys()) { if (k.IsEncryptionKey) return k; } throw new ArgumentException("Can't find encryption key in key ring."); } public static void EncryptFile(string inputFile, string outputFile, PgpPublicKey encKey, bool armor, bool withIntegrityCheck) { using (MemoryStream bOut = new MemoryStream()) { PgpCompressedDataGenerator comData = new PgpCompressedDataGenerator(CompressionAlgorithmTag.Zip); PgpUtilities.WriteFileToLiteralData(comData.Open(bOut), PgpLiteralData.Binary, new FileInfo(inputFile)); comData.Close(); PgpEncryptedDataGenerator cPk = new PgpEncryptedDataGenerator(SymmetricKeyAlgorithmTag.Aes256, withIntegrityCheck, new SecureRandom()); cPk.AddMethod(encKey); byte[] bytes = bOut.ToArray(); using (Stream outputStream = File.Create(outputFile)) { if (armor) { using (ArmoredOutputStream armoredStream = new ArmoredOutputStream(outputStream)) using (Stream cOut = cPk.Open(armoredStream, bytes.Length)) { cOut.Write(bytes, 0, bytes.Length); } } else { using (Stream cOut = cPk.Open(outputStream, bytes.Length)) { cOut.Write(bytes, 0, bytes.Length); } } } } } 

Answer 4

有一篇关于代码项目的文章http://www.codeproject.com/KB/security/sharpprivacy.aspx?df=100&forumid=15716&exp=0&select=573797 ，它有方法：

 public static string EncryptText(string strMessage, PublicKeyRing pkrPublicKeyRing, SecretKeyRing skrSecretKeyRing, bool bSign private static void DecryptAndVerify(SecretKeyRing skrSecretKeyRing, PublicKeyRing pkrPublicKeyRing, byte[] bData) 

这可能是你正在寻找的，或者至少指出你正确的方向来编写自己的。