ldid is a tool made by saurik for modifying a binary's entitlements easily. ldid also generates SHA1 hashes for the binary signature, so the iPhone kernel executes the binary.
ldid -e dumps the binary's entitlements.
ldid -Sent.xml sets the binary's entitlements.
The package name in Cydia is "Link Identity Editor", hosted by the Cydia/Telesphoreo repository.
Via Brew or Fink, or from source:
git clone git://git.saurik.com/ldid.git cd ldid git submodule update --init ./make.sh cp -f ./ldid $THEOS/bin/ldid