在Bouncycastle PGP解密过程中的PartialInputStream

还在纠结的人，这里有一个可行的代码:

using System;
using System.Xml;
using System.IO;
using System.Security.Cryptography;
using System.Security.Cryptography.Xml;
using System.Text;
using Org.BouncyCastle.Bcpg.OpenPgp;
using Org.BouncyCastle.Security;
using Org.BouncyCastle.Utilities.IO;
using Org.BouncyCastle.Utilities.Encoders;
using Org.BouncyCastle.Bcpg;
class Program
{
    private static PgpPublicKey ReadPublicKey(Stream inputStream)
    {
        inputStream = PgpUtilities.GetDecoderStream(inputStream);
        PgpPublicKeyRingBundle pgpPub = new PgpPublicKeyRingBundle(inputStream);
        //
        // 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.
        //
        //
        // iterate through the key rings.
        //
        foreach (PgpPublicKeyRing kRing in pgpPub.GetKeyRings())
        {
            foreach (PgpPublicKey k in kRing.GetPublicKeys())
            {
                if (k.IsEncryptionKey)
                {
                    return k;
                }
            }
        }
        throw new ArgumentException("Can't find encryption key in key ring.");
    }
    private static byte[] EncryptFile(byte[] clearData, string fileName, PgpPublicKey encKey, bool withIntegrityCheck)
    {
        MemoryStream bOut = new MemoryStream();
        PgpCompressedDataGenerator comData = new PgpCompressedDataGenerator(
            CompressionAlgorithmTag.Zip);
        Stream cos = comData.Open(bOut); // open it with the final destination
        PgpLiteralDataGenerator lData = new PgpLiteralDataGenerator();
        // we want to Generate compressed data. This might be a user option later,
        // in which case we would pass in bOut.
        Stream pOut = lData.Open(
            cos,                    // the compressed output stream
            PgpLiteralData.Binary,
            fileName,               // "filename" to store
            clearData.Length,       // length of clear data
            DateTime.UtcNow         // current time
        );
        pOut.Write(clearData, 0, clearData.Length);
        lData.Close();
        comData.Close();
        PgpEncryptedDataGenerator cPk = new PgpEncryptedDataGenerator(SymmetricKeyAlgorithmTag.Cast5, new SecureRandom());
        cPk.AddMethod(encKey);
        byte[] bytes = bOut.ToArray();
        MemoryStream encOut = new MemoryStream();
        Stream os = encOut;
        Stream cOut = cPk.Open(os, bytes.Length);
        cOut.Write(bytes, 0, bytes.Length);  // obtain the actual bytes from the compressed stream
        cOut.Close();
        encOut.Close();
        return encOut.ToArray();
    }
    static void Main(string[] args)
    {
        try
        {
            byte[] dataBytes = File.ReadAllBytes("test.xml");
            Stream keyIn = File.OpenRead("cert.asc");
            Stream outStream = File.Create("data.bpg");
            byte[] encrypted = EncryptFile(dataBytes, "data", ReadPublicKey(keyIn), false);
            outStream.Write(encrypted, 0, encrypted.Length);
            keyIn.Close();
            outStream.Close();
        }
        catch (Exception e)
        {
            Console.WriteLine(e.Message);
        }
        Console.ReadLine();
    }
}

当我试图从'流'中读取时，我得到了相同的错误。

PgpLiteralData ld = (PgpLiteralData)message;
var stream = ld.GetInputStream(); // the stream to read form

我的解决方案是将流复制到一个新的。net流对象比如MemoryStream。然后从memoryStream对象中读取。

因此，我的基本流类型与Org.BouncyCastle.Bcpg流类型无关。