# IPA path
IPA="./IPA_FILE_NAME.ipa"

#Provision Profile Path
PROVISION="/Users/[username]/Library/MobileDevice/Provisioning Profiles/[provisioning profile id].mobileprovision"

# Developer Certificate Name (Found in KeyChain)
CERTIFICATE="iPhone Developer: First Last (XXXXXXXXXX)" # must be in keychain

# unzip the ipa
unzip -q "$IPA"
# remove the signature
rm -rf Payload/*.app/_CodeSignature Payload/*.app/CodeResources
# replace the provision
cp "$PROVISION" Payload/*.app/embedded.mobileprovision
# sign with the new certificate
/usr/bin/codesign -f -s "$CERTIFICATE" --resource-rules Payload/*.app/ResourceRules.plist Payload/*.app
# zip it back up
zip -qr resigned.ipa Payload