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WindowsCryptographicException The system cannot find the file specified.


Azure – while trying to read pfx (certificate) from disk I came across a number of issues, but thought this might help some out.

- May 8, 2020

Rest of the Story:

Azure – while trying to read pfx (certificate) from disk I came across a number of issues, but thought this might help some out.

The fix was adding the final parameter X509KeyStorageFlags

var cert = new X509Certificate2(
    $"{Environment.ContentRootPath}/App_Data/mycert.pfx","{password}",
    X509KeyStorageFlags.MachineKeySet);
C#

Other references:

https://support.microsoft.com/en-us/help/950090/installing-a-pfx-file-using-x509certificate-from-a-standard-net-applic https://stackoverflow.com/questions/52750160/what-is-the-rationale-for-all-the-different-x509keystorageflags

An unhandled exception occurred while processing the request.
WindowsCryptographicException: The system cannot find the file specified. System.Security.Cryptography.CngKey.Open(string keyName, CngProvider provider, CngKeyOpenOptions openOptions)  
Exception: An error was encountered while handling the remote login. Microsoft.AspNetCore.Authentication.RemoteAuthenticationHandler<TOptions>.HandleRequestAsync()  
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Microsoft.IdentityModel.Tokens.X509SecurityKey.get_PrivateKey() 
Microsoft.IdentityModel.Tokens.X509SecurityKey.get_PrivateKeyStatus() 
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Microsoft.IdentityModel.Tokens.CryptoProviderFactory.CreateSignatureProvider(SecurityKey key, string algorithm, bool willCreateSignatures) 
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