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(PureBasic) RSA Signature with Certificate's Private Key from PFXSee more RSA ExamplesDemonstrates how to use a certificate's private key from a PFX file to create an RSA signature.Note: This example requires Chilkat v11.0.0 or greater.
IncludeFile "CkCertStore.pb" IncludeFile "CkCert.pb" IncludeFile "CkJsonObject.pb" IncludeFile "CkRsa.pb" IncludeFile "CkPrivateKey.pb" Procedure ChilkatExample() success.i = 0 ; This example requires the Chilkat API to have been previously unlocked. ; See Global Unlock Sample for sample code. ; Create an instance of a certificate store object, load a PFX file, ; locate the certificate we need, and use it for signing. ; (a PFX file may contain more than one certificate.) certStore.i = CkCertStore::ckCreate() If certStore.i = 0 Debug "Failed to create object." ProcedureReturn EndIf ; The 1st argument is the filename, the 2nd arg is the ; PFX file's password: success = CkCertStore::ckLoadPfxFile(certStore,"chilkat.pfx","test") If success = 0 Debug CkCertStore::ckLastErrorText(certStore) CkCertStore::ckDispose(certStore) ProcedureReturn EndIf ; Find the certificate by the subject common name: jsonCN.i = CkJsonObject::ckCreate() If jsonCN.i = 0 Debug "Failed to create object." ProcedureReturn EndIf CkJsonObject::ckUpdateString(jsonCN,"CN","cert common name") cert.i = CkCert::ckCreate() If cert.i = 0 Debug "Failed to create object." ProcedureReturn EndIf success = CkCertStore::ckFindCert(certStore,jsonCN,cert) If success = 0 Debug CkCertStore::ckLastErrorText(certStore) CkCertStore::ckDispose(certStore) CkJsonObject::ckDispose(jsonCN) CkCert::ckDispose(cert) ProcedureReturn EndIf privKey.i = CkPrivateKey::ckCreate() If privKey.i = 0 Debug "Failed to create object." ProcedureReturn EndIf success = CkCert::ckGetPrivateKey(cert,privKey) If success = 0 Debug CkCert::ckLastErrorText(cert) CkCertStore::ckDispose(certStore) CkJsonObject::ckDispose(jsonCN) CkCert::ckDispose(cert) CkPrivateKey::ckDispose(privKey) ProcedureReturn EndIf rsa.i = CkRsa::ckCreate() If rsa.i = 0 Debug "Failed to create object." ProcedureReturn EndIf success = CkRsa::ckUsePrivateKey(rsa,privKey) If success = 0 Debug CkRsa::ckLastErrorText(rsa) CkCertStore::ckDispose(certStore) CkJsonObject::ckDispose(jsonCN) CkCert::ckDispose(cert) CkPrivateKey::ckDispose(privKey) CkRsa::ckDispose(rsa) ProcedureReturn EndIf ; Encode the signature as a hex string CkRsa::setCkEncodingMode(rsa, "hex") strData.s = "This is the string to be signed." ; Sign the string using the sha-1 hash algorithm. ; Other valid choices are "sha-256", "md2" and "md5". hexSig.s = CkRsa::ckSignStringENC(rsa,strData,"sha-1") Debug hexSig Debug "Success!" CkCertStore::ckDispose(certStore) CkJsonObject::ckDispose(jsonCN) CkCert::ckDispose(cert) CkPrivateKey::ckDispose(privKey) CkRsa::ckDispose(rsa) ProcedureReturn EndProcedure |
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