not able to access PGP keys in Class added to vault as Secret

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Posted on by PriyaDutta

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Hi All,

I have uploaded PGP keys (Public key, Private key and passphrase) in Azure Keyvault. I am able to fetch the key values in F&O by below code:

  select keyVaultParameters where keyVaultParameters.Name == 'XXXX-KV';

  //passphrase
  select  certificateTablepass where certificateTablepass.KeyVaultRef==keyVaultParameters.RecId
      && certificateTablepass.Name == 'XXXXPGPPassphrase';
  
  str passphrase = KeyVaultCertificateHelper::getManualSecretValue(certificateTablepass.RecId);


  //privatekey
  select  certificateTablepriv where certificateTablepriv.KeyVaultRef==keyVaultParameters.RecId
       && certificateTablepriv.Name == 'XXXPGPPrivate';
  
  str passprivatekey = KeyVaultCertificateHelper::getManualSecretValue(certificateTablepriv.RecId);

  //publickey
  select  certificateTablepub where certificateTablepub.KeyVaultRef==keyVaultParameters.RecId
       && certificateTablepub.Name == 'XXXXPGPPublic';
  
  str passpublickey = KeyVaultCertificateHelper::getManualSecretValue(certificateTablepub.RecId);

Now in my dll project im trying to get the private keys , tried reading them to a Memory stream to create


                            PgpPublicKeyRingBundle publicKeyRingBundle = new PgpPublicKeyRingBundle(stream);
                PublicKey = GetFirstPublicKey(publicKeyRingBundle);

But it is throwing error. Is it correct way or is there something easier to access the keys , create them as PGPublic Private keys.

Please help.

Thanks,

Priya

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Jonas "Jones&q... 5,016 Most Valuable Professional on at

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What is throwing an error? Assuming it's in your .Net assembly, what kind of exception did it throw?

Can you share the exception message?
PriyaDutta 351 on at

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Hi Jones,

Im getting the below error

Trying to convert the string to MemoryStream. Tried from F&O and passed it to Dll. I also tried to create the stream here in .net but same error message comes.

Is there a better way ?

Thanks.
Jonas "Jones&q... 5,016 Most Valuable Professional on at

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Ho do you create the MemoryStream?

I have found an example in the standard application:
PriyaDutta 351 on at

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Hi Jonas,

I am creating a byte array and passing from F&O

str passpublickey = KeyVaultCertificateHelper::getManualSecretValue(certificateTablepub.RecId); System.Byte[] passpublickeybyte; System.Text.Encoding passpublickeyencoding = System.Text.Encoding::get_UTF8(); passpublickeybyte = passpublickeyencoding.GetBytes(passpublickey); outputStream1 = obj.OutputEncryptStream(stream,stream,passpublickeybyte,passprivatekeybyte,passphrase);

After that in .net class i am writing the below code

public MemoryStream OutputEncryptStream(MemoryStream inputstream, MemoryStream outputStream, System.Byte[] publicbyte, System.Byte[] privatebyte, string passphrase) { MemoryStream publickeyStream = new MemoryStream(publicbyte); // PGPKeyPair keyPair = new PGPKeyPair(publickeyStream); Stream inputStream = PgpUtilities.GetDecoderStream(publickeyStream); PgpPublicKeyRingBundle publicKeyRingBundle = new PgpPublicKeyRingBundle(inputStream); PublicKey = GetFirstPublicKey(publicKeyRingBundle);
Martin Dráb 240,854 Most Valuable Professional on at

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The exception says that the stream has already been closed (disposed). It happens at the end of a 'using' block or when Close() or Dispose() is called explicitly. Look for these things in your code.

It's strange that code of OutputEncryptStream() you've shared with us below doesn't match the code you executed when you got the error (as the screenshot shows). There you got publickeyStream as a method parameter, and it was this stream that was closed.

It'll help a lot if you share the right code with us.
Jonas "Jones&q... 5,016 Most Valuable Professional on at

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Can you upload the latest source code?

It's difficult to help if we cannot see it.

If it gives you issues uploading the source to the forum, you can use a GitHub gist.