When an application generates a key with an attestation request, the `generateKey` method returns a `KeyMetadata` object which contains the full, unpatched certificate chain.
This leaves a potential detection vector open. A sophisticated application could inspect the returned data in its own process memory and discover the original, hardware-backed certificates before they are used for attestation, thus detecting the hooking framework.
This commit introduces a post-transaction hook for the `generateKey` transaction. After the genuine KeyStore service has executed the request, this hook intercepts the reply parcel. It extracts the certificate chain from the `KeyMetadata`, applies the patching routine, and then reconstructs the reply with the modified (patched) certificate chain.
JingMatrix
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