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hmz007
6d24f2138b
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3 years ago | |
|---|---|---|
| .. | ||
| res | 3 years ago | |
| src/com/android/cts/dexmetadata | 3 years ago | |
| Android.bp | 3 years ago | |
| AndroidTest.xml | 3 years ago | |
| OWNERS | 3 years ago | |
| README.md | 3 years ago | |
README.md
Fs-verity keys
All AOSP compatible devices ship with the Google-managed fs-verity certificate (located at build/make/target/product/security/fsverity-release.x509.der). The public key can verify the signature prebuilt of .dm.fsv_sig in res/.
Modifying a .dm file requires to regenerate the signature with some debug key. To use the debug key, you can run the following commands once per boot.
KEY_DIR=$ANDROID_BUILD_TOP/cts/hostsidetests/appsecurity/test-apps/ApkVerityTestApp/testdata
adb root
adb shell 'mini-keyctl padd asymmetric fsv-play .fs-verity' < $KEY_DIR/fsverity-debug.x509.der
Alternatively, copy the .der file to /{system, product}/etc/security/fsverity. The key will be located upon reboot.
How to modify the signed .dm
The easiet way is to re-sign and replace the signature in place. For example,
m fsverity
fsverity sign CtsDexMetadataSplitApp.dm CtsDexMetadataSplitApp.dm.fsv_sig \
--key="$KEY_DIR/fsverity-debug-key.pem" \
--cert="$KEY_DIR/fsverity-debug.x509.pem"