C＃如何使用PGP公钥简单加密文本文件？ [英] C# How to simply encrypt a text file with a PGP Public Key?
问题描述
public String Encrypt（String message，PublicKey publicKey）
不知道是否可以完成？如果没有，请有人开启我另一种方式来实现这一点：）
谢谢。
更新： / p>
到目前为止，我只看到OpenPGP加密的所有库需要公钥和私钥进行加密，而我只想使用公钥加密（因为我没有私钥使用它）！
我发现了一个教程这里，但它需要密钥和公钥来加密数据。但是，我修改了一些代码，只需要公钥（无签名，不压缩），并认为我应该发布在这里，以防万一有人也在寻找这个问题的解决方案。 Belows是修改的代码，作者的所有学分 - Kim先生。
public class PgpEncrypt
{
private PgpEncryptionKeys m_encryptionKeys;
private const int BufferSize = 0x10000;
///< summary>
///使用初始化的PgpEncryptionKeys实例化一个新的PgpEncrypt类。
///< / summary>
///< param name =encryptionKeys>< / param>
///< exception cref =ArgumentNullException> encryptionKeys为null< / exception>
public PgpEncrypt（PgpEncryptionKeys encryptionKeys）
{
if（encryptionKeys == null）
{
throw new ArgumentNullException（encryptionKeys，encryptionKeys为null ;
}
m_encryptionKeys = encryptionKeys;
}
///< summary>
///加密并签名unencryptedFileInfo指向的文件，
///将加密内容写入outputStream。
///< / summary>
///< param name =outputStream>当此方法返回时，将包含
///加密数据的流。< / param>
///< param name =fileName>要加密的文件的FileInfo< / param>
public void Encrypt（Stream outputStream，FileInfo unencryptedFileInfo）
{
if（outputStream == null）
{
throw new ArgumentNullException（outputStream，outputStream is空值。）;
}
if（unencryptedFileInfo == null）
{
throw new ArgumentNullException（unencryptedFileInfo，unencryptedFileInfo is null）;
}
if（！File.Exists（unencryptedFileInfo.FullName））
{
throw new ArgumentException（File to encrypt not found。
使用（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（）;
返回pgpLiteralDataGenerator.Open（encryptedOut，PgpLiteralData.Binary，
文件）;
}
}
当然要运行这些代码，你必须包括<您的项目中有一个href =http://www.bouncycastcast.org/csharp/ =noreferrer> BouncyCastle库。
我已经测试过加密然后再解密运行正常：）
I've researched a bit about how to achieve what I said in the question and found several APIs but most of them look very complicated and since I'm just a noobie in this area I just want a simple method like:
public String Encrypt(String message, PublicKey publicKey)
Don't know if this can be done? If not then please someone enlighten me another way to achieve this :)
Thank you.
UPDATE:
So far I have only seen that all of the library for OpenPGP encryption require both the public key and private key to do the encrypt while I only want to encrypt with the public key (because I don't have the private key to use it)!
I found a tutorial here but it requires both Secret Key and Public Key to encrypt data. However I've modified the codes a bit to only require public key (no signing, no compress) and thought I should publish it here in case anyone also looking for a solution for this question. Belows is the modified codes, all the credits for the author - Mr. Kim.
public class PgpEncrypt
{
private PgpEncryptionKeys m_encryptionKeys;
private const int BufferSize = 0x10000;
/// <summary>
/// Instantiate a new PgpEncrypt class with initialized PgpEncryptionKeys.
/// </summary>
/// <param name="encryptionKeys"></param>
/// <exception cref="ArgumentNullException">encryptionKeys is null</exception>
public PgpEncrypt(PgpEncryptionKeys encryptionKeys)
{
if (encryptionKeys == null)
{
throw new ArgumentNullException("encryptionKeys", "encryptionKeys is null.");
}
m_encryptionKeys = encryptionKeys;
}
/// <summary>
/// Encrypt and sign the file pointed to by unencryptedFileInfo and
/// write the encrypted content to outputStream.
/// </summary>
/// <param name="outputStream">The stream that will contain the
/// encrypted data when this method returns.</param>
/// <param name="fileName">FileInfo of the file to encrypt</param>
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);
}
}
Of course to run these codes you have to include BouncyCastle library in your project.
I've tested encrypting and then decrypting and it runs fine :)
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