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(Mono C#) Convert RSA Private Key to Public KeyDemonstrates how to get a public RSA key from a private RSA key.
Chilkat.PrivateKey key = new Chilkat.PrivateKey(); // Step 1: Load the private key from a source. // (Chilkat can load private keys from all types of formats, and from in-memory bytes or encoded strings. // see the online reference documentation for more options.) bool success = key.LoadPemFile("qa_data/pem/VP_Private.pem"); if (success != true) { Debug.WriteLine(key.LastErrorText); return; } // Step 2: Get the public key object from the private key object. Chilkat.PublicKey pubKey = key.GetPublicKey(); if (key.LastMethodSuccess != true) { Debug.WriteLine(key.LastErrorText); return; } // Step 3: Save the public key in a desired format. // (Chilkat can load or save public and private keys in many different formats. See // the online reference documentation for more options.) // Saves to a PKCS8 PEM file. bool bPreferPkcs1 = false; success = pubKey.SavePemFile(bPreferPkcs1,"qa_data/pem/VP_Public.pem"); if (pubKey.LastMethodSuccess != true) { Debug.WriteLine(pubKey.LastErrorText); return; } Debug.WriteLine("Extracted and saved public key from private key."); |
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