(DataFlex) X509Certificate GetCertHash SHA256

See more Certificates Examples

Shows how to get the SHA256 hash of a certificate.

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows

Use ChilkatAx-win32.pkg

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

    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