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DataFlex Examples

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(DataFlex) Sign a File to Create a .p7m File (using a PFX)

DataFlex example to sign a file creating a .p7m file as output. The .p7m contains the signed contents of the original file. It can be verified and restored by calling VerifyP7M.

Chilkat ActiveX Downloads

ActiveX for 32-bit and 64-bit Windows

Use ChilkatAx-9.5.0-win32.pkg

Procedure Test
    Handle hoCrypt
    String sSigningCertSubject
    String sPfxFilename
    String sPfxPassword
    Handle hoCertStore
    Boolean iSuccess
    Variant vCert
    Handle hoCert
    String sInFile
    String sOutputFile
    String sTemp1
    Boolean bTemp1

    // This example requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    Get Create (RefClass(cComChilkatCrypt2)) To hoCrypt
    If (Not(IsComObjectCreated(hoCrypt))) Begin
        Send CreateComObject of hoCrypt
    End

    // Use a digital certificate and private key from a PFX file (.pfx or .p12).
    Move "Acme Inc" To sSigningCertSubject
    Move "/Users/chilkat/testData/pfx/acme.pfx" To sPfxFilename
    Move "test123" To sPfxPassword

    Get Create (RefClass(cComChilkatCertStore)) To hoCertStore
    If (Not(IsComObjectCreated(hoCertStore))) Begin
        Send CreateComObject of hoCertStore
    End
    Get ComLoadPfxFile Of hoCertStore sPfxFilename sPfxPassword To iSuccess
    If (iSuccess <> True) Begin
        Get ComLastErrorText Of hoCertStore To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    Get ComFindCertBySubjectCN Of hoCertStore sSigningCertSubject To vCert
    If (IsComObject(vCert)) Begin
        Get Create (RefClass(cComChilkatCert)) To hoCert
        Set pvComObject Of hoCert To vCert
    End
    Get ComLastMethodSuccess Of hoCertStore To bTemp1
    If (bTemp1 = False) Begin
        Showln "Failed to find certificate by subject common name."
        Procedure_Return
    End

    // Tell the crypt component to use this cert.
    Get ComSetSigningCert Of hoCrypt vCert To iSuccess

    // We can sign any type of file, creating a .p7m as output:
    Move "/Users/chilkat/testData/pdf/sample.pdf" To sInFile
    Move "/Users/chilkat/testData/p7m/sample.pdf.p7m" To sOutputFile
    Get ComCreateP7M Of hoCrypt sInFile sOutputFile To iSuccess
    If (iSuccess = False) Begin
        Get ComLastErrorText Of hoCrypt To sTemp1
        Showln sTemp1
        Send Destroy of hoCert
        Procedure_Return
    End

    // Verify and restore the original file:
    Get ComSetVerifyCert Of hoCrypt vCert To iSuccess

    Move sOutputFile To sInFile
    Move "/Users/chilkat/testData/pdf/restored.pdf" To sOutputFile

    Get ComVerifyP7M Of hoCrypt sInFile sOutputFile To iSuccess
    If (iSuccess = False) Begin
        Get ComLastErrorText Of hoCrypt To sTemp1
        Showln sTemp1
        Send Destroy of hoCert
        Procedure_Return
    End

    Send Destroy of hoCert

    Showln "Success!"


End_Procedure

 

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