DataFlex

X509Certificate GetCertHash SHA256

See more Certificates Examples

Shows how to get the SHA256 hash of a certificate. DataFlex

Use ChilkatAx-win32.pkg

Procedure Test
    Boolean iSuccess
    Handle hoCert
    Variant vBdDer
    Handle hoBdDer
    String sCertHash
    String sTemp1

    Move False To iSuccess

    Get Create (RefClass(cComChilkatCert)) To hoCert
    If (Not(IsComObjectCreated(hoCert))) Begin
        Send CreateComObject of hoCert
    End

    // Load a certificate object with a certificate.
    // The certificate object could have come from any source,
    // or perhaps was obtained from another Chilkat function.
    // The source does not matter.  What matters is that we have
    // a cert object loaded with the certificate..
    Get ComLoadFromFile Of hoCert "qa_data/certs/cert_test123.cer" To iSuccess
    If (iSuccess <> True) Begin
        Get ComLastErrorText Of hoCert To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    // Get the binary DER of the certificae, and compute the SHA256 hash:
    Get Create (RefClass(cComChilkatBinData)) To hoBdDer
    If (Not(IsComObjectCreated(hoBdDer))) Begin
        Send CreateComObject of hoBdDer
    End
    Get pvComObject of hoBdDer to vBdDer
    Get ComExportCertDerBd Of hoCert vBdDer To iSuccess

    // Get the base64 representation of the SHA256 hash.
    Get ComGetHash Of hoBdDer "sha256" "base64" To sCertHash

    Showln "Certificate hash in base64 = " sCertHash


End_Procedure