3 Replies Latest reply on Jun 8, 2014 10:31 PM by Carl Sun

    How to fix the invalid signature when installing WebZap Extension for Photoshop CS5.0

    ken_ultd

      I have installed the latest update of extension manager cs5 but the problem still existed.

       

      Is there any other options to fix this problem ?

       

      Untitled-1.jpg

        • 1. Re: How to fix the invalid signature when installing WebZap Extension for Photoshop CS5.0
          Carl Sun Level 4

          Do you mean you have installed 5.0.1 update? You can check the version in About dialog. Please go to Creating and validating XML signatures | Adobe Developer Connection and install the validation tool to validate the signature of WebZap extension. Unzip this extension to a empty folder with 7-zip or winzip, then click "Load signature" button in the tool, browse to META-INF/signatures.xml to load it, then click "Verify signature" button.

          • 2. Re: How to fix the invalid signature when installing WebZap Extension for Photoshop CS5.0
            ken_ultd Level 1

            Thanks for the reply.

             

            I have downloaded the tool and try the "Verify signature" action, however it seems the validation failed.
            The tool shows below message:

            ----------------------------------------------------------------
            Signature status: invalid

              Digest status: valid

              Identity status: invalid

              Reference status: unknown

             

            Signing certificate information only available for valid certificates.

            Manifest only validated when signature references are valid.

            ----------------------------------------------------------------
            As I am not so familiar to plugin, please kindly help on the above issue. Thank you very much !!

            • 3. Re: How to fix the invalid signature when installing WebZap Extension for Photoshop CS5.0
              Carl Sun Level 4

              The validation result is that the signature is invalid. The following is abstracted from XMLSignatureValidator - Adobe ActionScript® 3 (AS3 ) API Reference. It would be helpful for you to understand the validation result.

               

              About signature status:

              The validity of an XML signature can be valid, invalid, or unknown. The overall status depends on the verification status of the individual components of the signature file:

              • digestStatus — The validity of the cryptographic of the signature computed over the SignedInfo element. Can be valid, invalid, or unknown.
              • identityStatus — The validity of the signing certificate. If the certificate has expired, has been revoked, or altered, the status is invalid. If the certificate cannot be chained to a trusted root certificate, the status is unknown. The certificate is not checked if the digest is invalid. If not checked, the status will be reported as unknown.
              • referencesStatus — The validity of the data addressed by the references in the SignedInfo element of the signature file. Can be valid, invalid, or unknown. The references are not checked if the digest or certificate is invalid. Reference checking can also be skipped based on the setting of the referencesValidationSetting property. If not checked, the status will be reported as unknown.

              The signature validity reported by the validityStatus property can be:

              • valid — If referencesStatus, digestStatus, and identityStatus are all valid.
              • invalid — If any individual status is invalid.
              • unknown — If referencesStatusdigestStatus, or identityStatus is unknown.