A typical update-signed.zip is not a simple ZIP of raw binaries. Internally, it often contains:
Here’s a solid, professional description for update-signed.zip that you can use in documentation, a README, or a release note:
com/google/android/updater-script : A text file written in a scripting language (usually Edify) that contains the exact step-by-step instructions for the installation (e.g., wiping partitions, copying files, setting permissions). update-signed.zip
update-signed.zip/ ├── boot.img (The device's kernel and ramdisk) ├── system/ (System files, binaries, and default applications) ├── META-INF/ │ ├── CERT.SF (The list of files and their respective SHA-1/SHA-256 hashes) │ ├── CERT.RSA (The public key certificate and digital signature) │ └── com/ │ └── google/ │ └── android/ │ ├── update-binary (The execution command processor) │ └── updater-script (The script detailing file installation steps) Use code with caution.
These are the cryptographic signature files that verify the integrity of the zip. A typical update-signed
Also, check for common issues users might have, like failed updates or dependencies. Since I don't have info, perhaps a general caution that they should check system requirements.
: The recovery checks the signature against the keys stored on the device. update-binary updater-script . This script handles mounting partitions (like ), deleting old files, and extracting new ones. These are the cryptographic signature files that verify
“Signature verification failed” : The file has been edited, corrupted, or is not signed by a key that your recovery recognizes. If using stock recovery, this means you are trying to flash unauthorized software.