BouncyCastle create AsymmetricCipherKeyPair from existing keys?

Question

I have two AssymetricAlgorithm RSA keys that I have pulled out of a certificate that was in my keystore. One is the Public Key and the other the Private. Is there a way of getting this keypair into a BouncyCastle AsymmetricCipherKeyPair? BouncyCastle's AsymmetricCipherKeyPair expects a public and private AsymmetricKeyParameter however I have no way of getting my Private key without it being an instance of AssymetricAlgorithm.

see http://stackoverflow.com/questions/3240222/get-private-key-from-bouncycastle-x509-certificate-c for answer. — Petey B, Jul 14 '10 at 13:50

score 1 · Accepted Answer · edited May 23 '17 at 11:48

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The answer to this lies here:

Get Private Key from BouncyCastle X509 Certificate? C#

edited May 23 '17 at 11:48

Community

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answered Jul 14 '10 at 13:51

Petey B

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I suspect a better answer lies in the Org.BouncyCastle.Security.DotNetUtilities class – President James K. Polk Jul 15 '10 at 03:23

Prashanth · Answer 2 · 2017-12-28T04:00:38.057

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I think this will help if key is marked as exportable

RSACryptoServiceProvider key = (RSACryptoServiceProvider)X509Certificate2object.PrivateKey;
RSAParameters rsaparam = key.ExportParameters(true);
AsymmetricCipherKeyPair keypair = DotNetUtilities.GetRsaKeyPair(rsaparam);

edited Dec 28 '17 at 04:00

answered Nov 08 '17 at 06:44

Prashanth

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BouncyCastle create AsymmetricCipherKeyPair from existing keys?

2 Answers2