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(Excel) Convert RSA Private Key to Public KeyDemonstrates how to get a public RSA key from a private RSA key.
Dim key As Chilkat.PrivateKey Set key = Chilkat.NewPrivateKey ' 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.) success = key.LoadPemFile("qa_data/pem/VP_Private.pem") If (success <> True) Then Debug.Print key.LastErrorText Exit Sub End If ' Step 2: Get the public key object from the private key object. Set pubKey = key.GetPublicKey() If (key.LastMethodSuccess <> True) Then Debug.Print key.LastErrorText Exit Sub End If ' 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. bPreferPkcs1 = False success = pubKey.SavePemFile(bPreferPkcs1,"qa_data/pem/VP_Public.pem") If (pubKey.LastMethodSuccess <> True) Then Debug.Print pubKey.LastErrorText Exit Sub End If Debug.Print "Extracted and saved public key from private key." |
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