没有文件的PGP加密

Question

我正在为 csv 文件进行 PGP 加密，下面是我卡住的代码，基本上如果公钥在本地文本文件中，下面的代码有效，但是当我在 Azure blob 存储中具有相同的文件时，我将内容下载到内存流中，然后将其作为参数传递它不起作用， 简而言之，File.OpenRead有效，但不能使用内存流，请帮助

public static PgpPublicKey ReadPublicKey12()
{
var containerName = "pgpkeys";
string storageConnection = CloudConfigurationManager.GetSetting("StorageConnnection");
CloudStorageAccount cloudStorageAccount = CloudStorageAccount.Parse(storageConnection);
CloudBlobClient blobClient = cloudStorageAccount.CreateCloudBlobClient();
CloudBlobContainer cloudBlobContainer = blobClient.GetContainerReference(containerName);
CloudBlockBlob blockBlob = cloudBlobContainer.GetBlockBlobReference("keyPublic.txt");
Stream inputStream = new MemoryStream();           
blockBlob.DownloadToStream(inputStream);
//  inputStream = File.OpenRead(@"C:PGPTestkeyPublic1234.txt"); 
inputStream = PgpUtilities.GetDecoderStream(inputStream);
PgpPublicKeyRingBundle pgpPub = new PgpPublicKeyRingBundle(inputStream);
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.");
}

Answer 1

如果我们不将流位置重置为零 (inputStream.Position = 0;( 0 字节 blob 正在写入内存流，因此您需要按如下所示添加它。

var containerName = "pgpkeys";
string storageConnection = CloudConfigurationManager.GetSetting("StorageConnnection");
CloudStorageAccount cloudStorageAccount = CloudStorageAccount.Parse(storageConnection);
CloudBlobClient blobClient = cloudStorageAccount.CreateCloudBlobClient();
CloudBlobContainer cloudBlobContainer = blobClient.GetContainerReference(containerName);
CloudBlockBlob blockBlob = cloudBlobContainer.GetBlockBlobReference("keyPublic.txt");
Stream inputStream = new MemoryStream();           
blockBlob.DownloadToStream(inputStream);
inputStream.Position = 0;
inputStream = PgpUtilities.GetDecoderStream(inputStream);
PgpPublicKeyRingBundle pgpPub = new PgpPublicKeyRingBundle(inputStream);
foreach (PgpPublicKeyRing kRing in pgpPub.GetKeyRings())
{
foreach (PgpPublicKey k in kRing.GetPublicKeys())
{
Console.WriteLine("Obtained key from BLOB");
if (k.IsEncryptionKey)
return k;
Console.WriteLine("Obtained key from BLOB");
}
}
throw new ArgumentException("Can't find encryption key in key ring.");