Available integer parameters are:
-  CertificateChainVerificationPolicy  Policy for simplified
                        verification of the certificate chain:
                        #ccvp_dont_verify, #ccvp_accept_self_signed,
                        #ccvp_accept_self_signed_with_bio, or
                        #ccvp_accept_self_signed_with_rsa_bio.
                        The default value is
                        #ccvp_accept_self_signed_with_rsa_bio.
                        This parameter is used by SignDocDocument.renderPageAsImage(),
                        SignDocVerificationResult.verifyCertificateSimplified(), and
                        SignDocVerificationResult.verifyTimeStampCertificateSimplified() only.
-  CertificateRevocationVerificationPolicy  Policy for simplified
                        verification of
                        the revocation status of the certificates:
                        #crvp_dont_check, #crvp_offline, or
                        #crvp_online.
                        The default value is #crvp_dont_check.
                        This parameter is used by SignDocDocument.renderPageAsImage(),
                        SignDocVerificationResult.verifyCertificateSimplified(), and
                        SignDocVerificationResult.verifyTimeStampCertificateSimplified() only.
-  ChainPolicy        Abbreviation for "CertificateChainVerificationPolicy".
-  ComputeOfflineNextUpdate    Number of hours embedded CRLs and OCSP responses
                        that do not have a nextUpdate value will be
                        assumed to be valid after their thisUpdate value.
                        That is, nextUpdate will be computed from
                        thisUpdate by adding the specified number of
                        hours.
                        The value -1 is special and means that those
                        CRLs and OCSP responses will be assumed to be
                        valid indefinitely.
                        The default value is -1.
                        See also flag #vf_enforce_next_update of
                        integer parameter "VerificationFlags".
-  Flags              Abbreviation for "VerificationFlags".
-  Model              Abbreviation for "VerificationModel".
-  RevocationPolicy   Abbreviation for "CertificateRevocationVerificationPolicy".
-  Timeout            The timeout (in millisconds) for HTTP
                        connections used for checking the revocation
                        state of certificates. This value is ignored
                        unless vf_check_revocation
                        is set for integer parameter "VerificationFlags".
                        The default value is 10000.
-  VerificationFlags  Flags modifying the verification. This is a
                        combination of these flags:
                        #vf_check_revocation, #vf_crl_first,
                        #vf_enforce_next_update, #vf_enforce_ocsp_signer,
                        #vf_ignore_no_revocation,
                        #vf_no_ocsp_nonce, #vf_offline, #vf_online,
                        #vf_use_crl_only, #vf_use_ocsp_only.
                        If you pass 0, the revocation state of the
                        certificates won't be checked.
                        The default value is 0.
                        SignDocDocument.renderPageAsImage(),
                        SignDocVerificationResult.verifyCertificateSimplified(), and
                        SignDocVerificationResult.verifyTimeStampCertificateSimplified()
                        use integer parameter CertificateRevocationVerificationPolicy
                        instead of the vf_check_revocation flag.
                        #vf_offline should not be set for
                        SignDocDocument.addSignature().
-  VerificationModel  Model to be used for verifying the certificate
                        chain: #vm_minimal, #vm_chain, #vm_modified_shell,
                        or #vm_shell.
                        The default value is #vm_minimal.
                        SignDocDocument.addSignature() ignores this
                        parameter and uses #vm_chain if revocation
                        data is to be included in the signature.