(PureBasic) Transition from Email.GetSignedByCertChain to Email.LastSignerCert

Provides instructions for replacing deprecated GetSignedByCertChain method calls with LastSignerCert.

Note: This example requires Chilkat v11.0.0 or greater.

Chilkat PureBasic Module Download Chilkat PureBasic Module

IncludeFile "CkCert.pb"
IncludeFile "CkCertChain.pb"
IncludeFile "CkEmail.pb"

Procedure ChilkatExample()

    email.i = CkEmail::ckCreate()
    If email.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    ; ...
    ; ...

    ; ------------------------------------------------------------------------
    ; The GetSignedByCertChain method is deprecated:

    certChainObj.i = CkEmail::ckGetSignedByCertChain(email)
    If CkEmail::ckLastMethodSuccess(email) = 0
        Debug CkEmail::ckLastErrorText(email)
        CkEmail::ckDispose(email)
        ProcedureReturn
    EndIf

    ; ...
    ; ...

    CkCertChain::ckDispose(certChainObj)

    ; ------------------------------------------------------------------------
    ; Do the equivalent using LastSignerCert to get the signing certificate,
    ; then build the cert chain from the signing certificate object.

    signerCert.i = CkCert::ckCreate()
    If signerCert.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    success.i = CkEmail::ckLastSignerCert(email,0,signerCert)
    If success = 0
        Debug CkEmail::ckLastErrorText(email)
        CkEmail::ckDispose(email)
        CkCert::ckDispose(signerCert)
        ProcedureReturn
    EndIf

    ; Get the certificate chain from the signer certificate.
    certChain.i = CkCertChain::ckCreate()
    If certChain.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    success = CkCert::ckBuildCertChain(signerCert,certChain)
    If success = 0
        Debug CkCert::ckLastErrorText(signerCert)
        CkEmail::ckDispose(email)
        CkCert::ckDispose(signerCert)
        CkCertChain::ckDispose(certChain)
        ProcedureReturn
    EndIf



    CkEmail::ckDispose(email)
    CkCert::ckDispose(signerCert)
    CkCertChain::ckDispose(certChain)


    ProcedureReturn
EndProcedure