Unable to build a valid certificate chain for the signer.

39 sec read

How to get a cert in the first place:

http://www.adobe.com/devnet/air/articles/signing_air_applications_print.html

If you encounter this error when signing your AIR application, do the following:

  1. Download the Thawte Code Signing CA from www.thawte.com/roots
  2. Extract the contents and find file “Thawte Code Signing CA.cer” in folder Thawte Roots\Thawte Code Signing\Code Signing CA\
  3. Open “Internet Option” from control panel, click tab Content, then Certificate, then Intermediate Certification Authority. Then click on “Import certificate” button and import “Thawte Code Signing CA.cer”
  4. Now go back to your original p12 certificate file. Double click and import your system (be sure to enter your password). Check the option “Mark this key as exportable”
  5. After importing, go to Internet Options > Content > Certificates
  6. Select your certificate and click export
  7. Next
  8. Yes, export the private key
  9. Format: PKCS, (checked) Include all certificates in the… , (checked) Enable Strong protection, (unchecked) Delete the private key …
  10. Next
  11. Enter Password for the certificate
  12. Next enter filename and export the file

It should be good.

Reference:

http://forums.adobe.com/thread/433530


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One Reply to “Unable to build a valid certificate chain for the…”

  1. Hi Xu Cui, after re-exporting the certificate and signing your application, if you make right click , then proprieties , do you have a Digital signatures tab?

    I ask because I succeed to sign my application but as far as I know a signed application must have this tab that I previously mentioned.

    Regards

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