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我解密并将mp3文件保存到blob存储中。C#使用RijndaelManaged和CryptoStream解密mp3文件
但是,当我解密并下载文件时,我无法播放它。我使用了一个说明“未知文件格式”的Mp3验证工具。我相信这是解密不起作用,因为它可以下载未加密的Mp3文件。我首先在Azure webjob函数中显示加密代码。我展示了解密方法和使用它的方法。我已经删除了处理键和这样或清晰。
加密
public static void EncryptBlob(
[BlobTrigger("callstest/{name}")]
[Blob("callstest/{name}", FileAccess.Read)] Stream blobInput,
[Blob("encryptedcalls/{name}.vega", FileAccess.Write)] Stream blobOutput)
{
try
{
var password = "myKey123";
var ue = new UnicodeEncoding();
var key = ue.GetBytes(password);
var rmCrypto = new RijndaelManaged {Padding = PaddingMode.None};
using (var cs = new CryptoStream(blobOutput,
rmCrypto.CreateEncryptor(key, key),
CryptoStreamMode.Write))
{
int data;
while ((data = blobInput.ReadByte()) != -1)
cs.WriteByte((byte)data);
}
}
catch
{
Trace.TraceError("an error occured during encryption of the file-get the name?");
}
}
AdminController
public async Task<ActionResult> DownloadMp3FromUrl()
{
var file = await _recordingService.GetRecordingFromUrl();
var fileName = "filetest.mp3";
return File(file,"audio/mpeg", fileName);
}
录音业务处理
public async Task<byte[]> GetRecordingFromUrl()
{
var container = _blobClient.GetContainerReference("encryptedcalls");
var blockBlob = container.GetBlockBlobReference("SearchFiles.mp3.vega");
try
{
var password = "myKey123";
var ue = new UnicodeEncoding();
var key = ue.GetBytes(password);
var rmCrypto = new RijndaelManaged { Padding = PaddingMode.None };
using (var stream = new MemoryStream())
{
blockBlob.FetchAttributes();
blockBlob.DownloadToStream(stream, null, null);
using (var cs = new CryptoStream(stream, rmCrypto.CreateDecryptor(key, key), CryptoStreamMode.Read))
{
int data;
while ((data = stream.ReadByte()) != -1)
cs.WriteByte((byte)data);
return stream.ToArray();
}
}
}
catch
{
Trace.TraceError("an error occured during encryption of the file-get the name?");
}
return null;
}