blocks|key|875305|text|你看过bouncycastle+pgp了吗？http://www.bouncycastle.org/|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|875306|这里有一个对取自BouncyCastle站点的文件进行加密的源代码示例：Need+example+for+BouncyCastle+PGP+File+encryption+in+C#|875307|entityMap|0|LINK|mutability|MUTABLE|url|http://www.bouncycastle.org/|1|https://stackoverflow.com/questions/2693769/need-example-for-bouncycastle-pgp-file-encryption-in-c^0|M|S|0|0|10|1J|1|0^^$0|@$1|2|3|4|5|6|7|P|8|@]|9|@$A|Q|B|R|1|S]]|C|$]]|$1|D|3|E|5|6|7|T|8|@]|9|@$A|U|B|V|1|W]]|C|$]]|$1|F|3|-4|5|6|7|X|8|@]|9|@]|C|$]]]|G|$H|$5|I|J|K|C|$L|M]]|N|$5|I|J|K|C|$L|O]]]]

Did you take a look at the bouncycastle pgp? <a href="http://www.bouncycastle.org/" rel="nofollow noreferrer">http://www.bouncycastle.org/</a>

There is a source example here of enrypting a file taken from the BouncyCastle site: <a href="https://stackoverflow.com/questions/2693769/need-example-for-bouncycastle-pgp-file-encryption-in-c">Need example for BouncyCastle PGP File encryption in C#</a>

blocks|key|1090001|text|我找到了一个教程here，但它同时需要私钥和公钥来加密数据。然而，我对代码做了一些修改，只需要公钥(不需要签名，不需要压缩)，我想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。下面是修改后的代码，所有的字幕都是作者-+Kim先生的。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1090002|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);
++++++++++++}+
}|code-block|syntax|javascript|1090003|当然，要运行这些代码，您必须在项目中包含BouncyCastle+library。|1090004|我测试了加密和解密，它运行得很好:)|1090005|entityMap|0|LINK|mutability|MUTABLE|url|http://blogs.microsoft.co.il/blogs/kim/archive/2009/01/23/pgp-zip-encrypted-files-with-c.aspx|1|http://www.bouncycastle.org/csharp/^0|8|4|0|0|0|K|K|1|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@]|9|@$A|X|B|Y|1|Z]]|C|$]]|$1|D|3|E|5|F|7|10|8|@]|9|@]|C|$G|H]]|$1|I|3|J|5|6|7|11|8|@]|9|@$A|12|B|13|1|14]]|C|$]]|$1|K|3|L|5|6|7|15|8|@]|9|@]|C|$]]|$1|M|3|-4|5|6|7|16|8|@]|9|@]|C|$]]]|N|$O|$5|P|Q|R|C|$S|T]]|U|$5|P|Q|R|C|$S|V]]]]

I found a tutorial <a href="http://blogs.microsoft.co.il/blogs/kim/archive/2009/01/23/pgp-zip-encrypted-files-with-c.aspx" rel="noreferrer">here</a> 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.

<pre><code>public class PgpEncrypt
 {
 private PgpEncryptionKeys m_encryptionKeys;
 private const int BufferSize = 0x10000; 
 /// &lt;summary&gt;
 /// Instantiate a new PgpEncrypt class with initialized PgpEncryptionKeys.
 /// &lt;/summary&gt;
 /// &lt;param name="encryptionKeys"&gt;&lt;/param&gt;
 /// &lt;exception cref="ArgumentNullException"&gt;encryptionKeys is null&lt;/exception&gt;
 public PgpEncrypt(PgpEncryptionKeys encryptionKeys)
 {
 if (encryptionKeys == null)
 {
 throw new ArgumentNullException("encryptionKeys", "encryptionKeys is null.");
 }
 m_encryptionKeys = encryptionKeys;
 }
 /// &lt;summary&gt;
 /// Encrypt and sign the file pointed to by unencryptedFileInfo and
 /// write the encrypted content to outputStream.
 /// &lt;/summary&gt;
 /// &lt;param name="outputStream"&gt;The stream that will contain the
 /// encrypted data when this method returns.&lt;/param&gt;
 /// &lt;param name="fileName"&gt;FileInfo of the file to encrypt&lt;/param&gt;
 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)) &gt; 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);
 } 
}
</code></pre>

Of course to run these codes you have to include <a href="http://www.bouncycastle.org/csharp/" rel="noreferrer">BouncyCastle library</a> in your project. 
I've tested encrypting and then decrypting and it runs fine :)

blocks|key|1090020|text|如果你正在寻找一个简单的dotnet库来做pgp加密，看看PgpCore。它是一个围绕Bouncy+Castle的包装器-只是让它比需要了解Bouncy+Castle的内部结构简单一点。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1090021|entityMap|0|LINK|mutability|MUTABLE|url|https://github.com/mattosaurus/PgpCore|1|https://www.bouncycastle.org/^0|T|7|0|17|D|1|0^^$0|@$1|2|3|4|5|6|7|N|8|@]|9|@$A|O|B|P|1|Q]|$A|R|B|S|1|T]]|C|$]]|$1|D|3|-4|5|6|7|U|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]|L|$5|G|H|I|C|$J|M]]]]

If you are looking for a simple dotnet library to do pgp encryption take a look at <a href="https://github.com/mattosaurus/PgpCore" rel="nofollow noreferrer">PgpCore</a>. Its a wrapper around <a href="https://www.bouncycastle.org/" rel="nofollow noreferrer">Bouncy Castle</a> - just making it a little bit easier than needing to know the internals of Bouncy Castle.

blocks|key|875390|text|如果您想在dotnet核心中进行加密和解密，这是我关注的文章：https://nightbaker.github.io/pgp/cryptography/.net/core/2019/02/08/pgp-encryption/|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|875391|加密部分不需要私钥。|875392|所有的作品都归原作者NightBaker所有。|875393|Install-Package++BouncyCastle.NetCore
Install-Package++BouncyCastle.NetCoreSdk|code-block|syntax|javascript|875394|public+class+Pgp
{
++++public+static+void+EncryptFile(
++++++++string+outputFileName,
++++++++string+inputFileName,
++++++++string+encKeyFileName,
++++++++bool+armor,
++++++++bool+withIntegrityCheck)
++++{
++++++++PgpPublicKey+encKey+=+PgpExampleUtilities.ReadPublicKey(encKeyFileName);

++++++++using+(Stream+output+=+File.Create(outputFileName))
++++++++{
++++++++++++EncryptFile(output,+inputFileName,+encKey,+armor,+withIntegrityCheck);
++++++++}
++++}

++++private+static+void+EncryptFile(
++++++++Stream+outputStream,
++++++++string+fileName,
++++++++PgpPublicKey+encKey,
++++++++bool+armor,
++++++++bool+withIntegrityCheck)
++++{
++++++++if+(armor)
++++++++{
++++++++++++outputStream+=+new+ArmoredOutputStream(outputStream);
++++++++}

++++++++try
++++++++{
++++++++++++byte[]+bytes+=+PgpExampleUtilities.CompressFile(fileName,+CompressionAlgorithmTag.Zip);

++++++++++++PgpEncryptedDataGenerator+encGen+=+new+PgpEncryptedDataGenerator(
++++++++++++++++SymmetricKeyAlgorithmTag.Cast5,+withIntegrityCheck,+new+SecureRandom());
++++++++++++encGen.AddMethod(encKey);

++++++++++++Stream+cOut+=+encGen.Open(outputStream,+bytes.Length);

++++++++++++cOut.Write(bytes,+0,+bytes.Length);
++++++++++++cOut.Close();

++++++++++++if+(armor)
++++++++++++{
++++++++++++++++outputStream.Close();
++++++++++++}
++++++++}
++++++++catch+(PgpException+e)
++++++++{
++++++++++++Console.Error.WriteLine(e);

++++++++++++Exception+underlyingException+=+e.InnerException;
++++++++++++if+(underlyingException+!=+null)
++++++++++++{
++++++++++++++++Console.Error.WriteLine(underlyingException.Message);
++++++++++++++++Console.Error.WriteLine(underlyingException.StackTrace);
++++++++++++}
++++++++}
++++}
}

public+class+PgpExampleUtilities
{
++++internal+static+PgpPublicKey+ReadPublicKey(string+fileName)
++++{
++++++++using+(Stream+keyIn+=+File.OpenRead(fileName))
++++++++{
++++++++++++return+ReadPublicKey(keyIn);
++++++++}
++++}

++++internal+static+PgpPublicKey+ReadPublicKey(Stream+input)
++++{
++++++++PgpPublicKeyRingBundle+pgpPub+=+new+PgpPublicKeyRingBundle(
++++++++++++PgpUtilities.GetDecoderStream(input));

++++++++//
++++++++//+we+just+loop+through+the+collection+till+we+find+a+key+suitable+for+encryption,+in+the+real
++++++++//+world+you+would+probably+want+to+be+a+bit+smarter+about+this.
++++++++//

++++++++foreach+(PgpPublicKeyRing+keyRing+in+pgpPub.GetKeyRings())
++++++++{
++++++++++++foreach+(PgpPublicKey+key+in+keyRing.GetPublicKeys())
++++++++++++{
++++++++++++++++if+(key.IsEncryptionKey)
++++++++++++++++{
++++++++++++++++++++return+key;
++++++++++++++++}
++++++++++++}
++++++++}

++++++++throw+new+ArgumentException("Can't+find+encryption+key+in+key+ring.");
++++}


++++internal+static+byte[]+CompressFile(string+fileName,+CompressionAlgorithmTag+algorithm)
++++{
++++++++MemoryStream+bOut+=+new+MemoryStream();
++++++++PgpCompressedDataGenerator+comData+=+new+PgpCompressedDataGenerator(algorithm);
++++++++PgpUtilities.WriteFileToLiteralData(comData.Open(bOut),+PgpLiteralData.Binary,
++++++++++++new+FileInfo(fileName));
++++++++comData.Close();
++++++++return+bOut.ToArray();
++++}
}|875395|用法：|875396|Pgp.EncryptFile("Resources/output.txt",+"Resources/input.txt",+"Resources/publicKey.txt",+true,+true);|875397|entityMap|0|LINK|mutability|MUTABLE|url|https://nightbaker.github.io/pgp/cryptography/.net/core/2019/02/08/pgp-encryption/^0|V|2A|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|10|8|@]|9|@$A|11|B|12|1|13]]|C|$]]|$1|D|3|E|5|6|7|14|8|@]|9|@]|C|$]]|$1|F|3|G|5|6|7|15|8|@]|9|@]|C|$]]|$1|H|3|I|5|J|7|16|8|@]|9|@]|C|$K|L]]|$1|M|3|N|5|J|7|17|8|@]|9|@]|C|$K|L]]|$1|O|3|P|5|6|7|18|8|@]|9|@]|C|$]]|$1|Q|3|R|5|J|7|19|8|@]|9|@]|C|$K|L]]|$1|S|3|-4|5|6|7|1A|8|@]|9|@]|C|$]]]|T|$U|$5|V|W|X|C|$Y|Z]]]]

If you want to do both encryption and decryption in dotnet core, this is the article I followed: <a href="https://nightbaker.github.io/pgp/cryptography/.net/core/2019/02/08/pgp-encryption/" rel="noreferrer">https://nightbaker.github.io/pgp/cryptography/.net/core/2019/02/08/pgp-encryption/</a>

The encryption part does not require the private key.

All credits go to the original author NightBaker.

<pre><code>Install-Package BouncyCastle.NetCore
Install-Package BouncyCastle.NetCoreSdk
</code></pre>

<pre class="lang-cs prettyprint-override"><code>public class Pgp
{
 public static void EncryptFile(
 string outputFileName,
 string inputFileName,
 string encKeyFileName,
 bool armor,
 bool withIntegrityCheck)
 {
 PgpPublicKey encKey = PgpExampleUtilities.ReadPublicKey(encKeyFileName);

 using (Stream output = File.Create(outputFileName))
 {
 EncryptFile(output, inputFileName, encKey, armor, withIntegrityCheck);
 }
 }

 private static void EncryptFile(
 Stream outputStream,
 string fileName,
 PgpPublicKey encKey,
 bool armor,
 bool withIntegrityCheck)
 {
 if (armor)
 {
 outputStream = new ArmoredOutputStream(outputStream);
 }

 try
 {
 byte[] bytes = PgpExampleUtilities.CompressFile(fileName, CompressionAlgorithmTag.Zip);

 PgpEncryptedDataGenerator encGen = new PgpEncryptedDataGenerator(
 SymmetricKeyAlgorithmTag.Cast5, withIntegrityCheck, new SecureRandom());
 encGen.AddMethod(encKey);

 Stream cOut = encGen.Open(outputStream, bytes.Length);

 cOut.Write(bytes, 0, bytes.Length);
 cOut.Close();

 if (armor)
 {
 outputStream.Close();
 }
 }
 catch (PgpException e)
 {
 Console.Error.WriteLine(e);

 Exception underlyingException = e.InnerException;
 if (underlyingException != null)
 {
 Console.Error.WriteLine(underlyingException.Message);
 Console.Error.WriteLine(underlyingException.StackTrace);
 }
 }
 }
}

public class PgpExampleUtilities
{
 internal static PgpPublicKey ReadPublicKey(string fileName)
 {
 using (Stream keyIn = File.OpenRead(fileName))
 {
 return ReadPublicKey(keyIn);
 }
 }

 internal static PgpPublicKey ReadPublicKey(Stream input)
 {
 PgpPublicKeyRingBundle pgpPub = new PgpPublicKeyRingBundle(
 PgpUtilities.GetDecoderStream(input));

 //
 // we just loop through the collection till we find a key suitable for encryption, in the real
 // world you would probably want to be a bit smarter about this.
 //

 foreach (PgpPublicKeyRing keyRing in pgpPub.GetKeyRings())
 {
 foreach (PgpPublicKey key in keyRing.GetPublicKeys())
 {
 if (key.IsEncryptionKey)
 {
 return key;
 }
 }
 }

 throw new ArgumentException("Can't find encryption key in key ring.");
 }


 internal static byte[] CompressFile(string fileName, CompressionAlgorithmTag algorithm)
 {
 MemoryStream bOut = new MemoryStream();
 PgpCompressedDataGenerator comData = new PgpCompressedDataGenerator(algorithm);
 PgpUtilities.WriteFileToLiteralData(comData.Open(bOut), PgpLiteralData.Binary,
 new FileInfo(fileName));
 comData.Close();
 return bOut.ToArray();
 }
}
</code></pre>

Usage:

<pre class="lang-cs prettyprint-override"><code>Pgp.EncryptFile("Resources/output.txt", "Resources/input.txt", "Resources/publicKey.txt", true, true);
</code></pre>

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:

<pre><code>public String Encrypt(String message, PublicKey publicKey)
</code></pre>

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)!

C# How to simply encrypt a text file with a PGP Public Key?

我研究了一下如何实现我在问题中所说的内容，找到了几个API，但它们中的大多数看起来都非常复杂，因为我在这方面只是一个新手，所以我只想要一个简单的方法，比如：public String Encrypt(String message, PublicKey publicKey)不知道这是不是可以做到？如果不是，请有人告诉我实...

问C#如何简单地使用PGP公钥加密文本文件？
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