DataFlex

Get the Signer Details of a Signed Email

Demonstrates the read-only Chilkat Email.SignedBy property. If the email was received digitally signed, this contains the fields of the signer certificate's Subject Distinguished Name, for example: US, 94105, California, San Francisco, 100 Market Street, Northwind Research LLC, Engineering, Avery Morgan. The values appear without the attribute-name prefixes (C=, ST=, L=, O=, CN=). It is intended for display or diagnostics; use LastSignerCert when the certificate object itself is needed.

Background: Every certificate identifies its owner with a Subject Distinguished Name (Subject DN) — a structured set of fields like Country (C), State (ST), Organization (O), and Common Name (CN). The CN is typically the person or entity the certificate was issued to. SignedBy gives you a human-readable rendering of that identity, which is handy for showing "who signed this?" without needing to parse the certificate yourself.

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Use ChilkatAx-win32.pkg

Procedure Test
    Boolean iSuccess
    Handle hoEmail
    String sTemp1
    Boolean bTemp1

    Move False To iSuccess

    //  Demonstrates the read-only Email.SignedBy property.  If the email was received
    //  digitally signed, this contains the fields of the signer certificate's SubjectDN
    //  (without the C=, ST=, L=, O=, CN= attribute names).

    Get Create (RefClass(cComChilkatEmail)) To hoEmail
    If (Not(IsComObjectCreated(hoEmail))) Begin
        Send CreateComObject of hoEmail
    End

    Get ComLoadEml Of hoEmail "qa_data/eml/signed.eml" To iSuccess
    If (iSuccess = False) Begin
        Get ComLastErrorText Of hoEmail To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    Get ComReceivedSigned Of hoEmail To bTemp1
    If (bTemp1 = True) Begin
        Get ComSignedBy Of hoEmail To sTemp1
        Showln "Signed by: " sTemp1
    End
    Else Begin
        Showln "This email was not signed."
    End

    //  Note: Paths such as "qa_data/..." are relative local filesystem paths,
    //  relative to the current working directory of the running application.


End_Procedure