In C# we do it like this: If you are planning to persist a certificate and a private key into a string to store somewhere (like we do), then you can use that Export call above, giving you both the certificate and private key. For DSA certificates, the accepted private key PEM label is "PRIVATE KEY". at System.Security.Cryptography.Utils.GetKeyPairHelper(CspAlgorithmType keyType, CspParameters parameters, Boolean randomKeyContainer, Int32 dwKeySize, SafeProvHandle& safeProvHandle, SafeKeyHandle& safeKeyHandle) But the cause will probably be because you don't have permissions to that key file. PEM-encoded items that have a different label are ignored. I see that 99% of the files in this directory are close to the same name. Sign in at System.Security.Cryptography.RSACryptoServiceProvider..ctor(CspParameters parameters) Steps to digitally sign a PDF document using X509Certificate2 class object programmatically: Create a new C# console application project. Content Discovery initiative April 13 update: Related questions using a Review our technical responses for the 2023 Developer Survey. (as above, you need to "de-PEM" it first, if it was PEM). To get the private key I am traying this code: I get this code from Microsoft docs: What is scrcpy OTG mode and how does it work? Which ability is most related to insanity: Wisdom, Charisma, Constitution, or Intelligence? NPOI - Apache License. It doesn't modify the certificate object, but rather produces a new cert object which knows about the key. at System.Security.Cryptography.Utils.CreateProvHandle(CspParameters parameters, Boolean randomKeyContainer) Why is it shorter than a normal address? And there's no one sized fits all. EPPlus 5 - Polyform Noncommercial - Starting May 2020 .NET core 3.1 doesn't support that method. Create X509Certificate2 from PEM file in .NET Core Internal.Cryptography.CryptoThrowHelper+WindowsCryptographicException with message Bad Version of provider. ExcelLibrary - GNU Lesser GPL Since I'm specifying StoreLocation.LocalMachine, they go to: Then I have a problem. When an X509 certificate is presented to someone, .NET of course strips out the private key. Having the private key property on the certificate object is a bit of a misrepresentation, especially since, as we'll see, there's a big difference in how the public and private key are dealt with.
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