Bouncycastle PGP解密期间的PartialInputStream

我正在尝试解密我刚刚使用bouncycastle加密的文件，但是我得到了这个例外：

Premature end of stream in PartialInputStream 

我正在使用bouncycastle的示例代码，并没有改变任何东西。

当我使用此代码进行加密时，我得到了这个：

 private static byte[] EncryptFile(byte[] clearData, string fileName, PgpPublicKey encKey, bool withIntegrityCheck) { MemoryStream encOut = new MemoryStream(); try { MemoryStream bOut = new MemoryStream(); PgpCompressedDataGenerator comData = new PgpCompressedDataGenerator( CompressionAlgorithmTag.Zip ); //PgpUtilities.WriteFileToLiteralData( // comData.Open(bOut), // PgpLiteralData.Binary, // new FileInfo(fileName)); Stream cos = comData.Open(bOut); PgpLiteralDataGenerator lData = new PgpLiteralDataGenerator(); Stream pOut = lData.Open( cos, PgpLiteralData.Binary, fileName, clearData.Length, DateTime.UtcNow ); lData.Close(); comData.Close(); PgpEncryptedDataGenerator cPk = new PgpEncryptedDataGenerator( SymmetricKeyAlgorithmTag.Cast5, withIntegrityCheck, new SecureRandom() ); cPk.AddMethod(encKey); byte[] bytes = bOut.ToArray(); Stream os = encOut; Stream cOut = cPk.Open(os, bytes.Length); cOut.Write(bytes, 0, bytes.Length); cOut.Close(); encOut.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); } } return encOut.ToArray(); } 

我认为这与PgpLiteralDataGenerator 。 但我需要使用它，因为我想从字节数组加密数据，而不是从文件加密。 还有其他方法吗？

Answer 1

任何人都是一个工作代码：

 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(); } } 

Answer 2

当我试图从’stream’读取时，我得到了同样的错误。

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

对我来说，一个解决方案是将流复制到一个新的.net Stream对象，如MemoryStream 。 之后从memoryStream对象中读取。

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