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(DataFlex) How to Parse a X.509 Certificate and Extract its Public KeyDemonstrates how to load an X.509 certificate and extract the public key. Chilkat supports many certificate encodings:
Note: This example requires Chilkat v11.0.0 or greater.
Use ChilkatAx-win32.pkg Procedure Test Boolean iSuccess Handle hoCert Variant vPubKey Handle hoPubKey String sTemp1 Move False To iSuccess Get Create (RefClass(cComChilkatCert)) To hoCert If (Not(IsComObjectCreated(hoCert))) Begin Send CreateComObject of hoCert End // Load a DER (binary) encoded certificate. // To load from a .pem or .p7b, or any other file format that contains // just one certificate, call LoadFromFile in exactly the same way. // The LoadFromFile method automatically detects the format and loads the certificate. Get ComLoadFromFile Of hoCert "qa_data/certs/testCert.cer" To iSuccess If (iSuccess = False) Begin Get ComLastErrorText Of hoCert To sTemp1 Showln sTemp1 Procedure_Return End // Get the public key: Get Create (RefClass(cComChilkatPublicKey)) To hoPubKey If (Not(IsComObjectCreated(hoPubKey))) Begin Send CreateComObject of hoPubKey End Get pvComObject of hoPubKey to vPubKey Get ComGetPublicKey Of hoCert vPubKey To iSuccess // Examine the key type. // A PublicKey object can contain an RSA, ECC, or DSA public key. // The KeyType property will contain "rsa", "ecc", or "dsa". Get ComKeyType Of hoPubKey To sTemp1 Showln "key type = " sTemp1 End_Procedure |
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