codesign extract certificates - hewigovens/hewigovens.github.com GitHub Wiki

$ codesign -dvvvv --extract-certificates /Applications/Mail.app

The certificates are saved in DER format, named codesign0, codesign1, ...

They can be displayed with OpenSSL :

$ openssl x509 -inform DER -in codesign0 -text

from http://quickies.seriot.ch/?id=481