CODEWITHSUNDEEP
c#rsaprivate-keypem
Bam
Bam

Reputation: 11

Converting a PKCS8 PEM Private key to a RSAParameter in C#

I have a key in the format

-----BEGIN PRIVATE KEY-----
-----END PRIVATE KEY-----

I want to convert it to an RSA key to create a JWT from it. I'm using .NET 3.5 Framework.

But when I Use this code

PemReader pemReader = new PemReader(new StringReader(pem));
object key = pemReader.ReadObject();
//rsapri
RSAParameters rsaParameters = isPrivate ?
      DotNetUtilities.ToRSAParameters((RsaPrivateCrtKeyParameters)(((AsymmetricCipherKeyPair)key).Private)) :
      DotNetUtilities.ToRSAParameters((RsaKeyParameters)key);
RSACryptoServiceProvider rsa = new RSACryptoServiceProvider();
rsa.ImportParameters(rsaParameters);

return rsa;

I get the error as

InvalidCastException: 'Unable to cast object of type 'Org.BouncyCastle.Crypto.Parameters.RsaPrivateCrtKeyParameters' to type 'Org.BouncyCastle.Crypto.AsymmetricCipherKeyPair'.'

I realized since the Private Key that I have is in PKCS8 and not PKCS1 format. Is there a way to convert the PKCS8 to RSA?

Upvotes: 0

Views: 183

Answers (0)

Related Questions