Question

我正在为一个csv文件进行PGP加密，下面是我被卡住的代码，如果公用密钥在本地文本文件中，则下面的代码基本上可以工作，但是当我在Azure blob存储中有相同文件时，我将内容下载到内存流中，然后将其作为不起作用的参数传递，总之File.OpenRead有效但内存流不起作用，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:\PGPTest\keyPublic1234.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;），则将0字节blob写入到内存流中，因此您需要如下添加。

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.");

没有文件的PGP加密

1 个答案: