commit 7599f1366e8a08781f415e73f65cf270aae36868
author Mark Rathjen <mrathjen@google.com> Mon Jan 23 14:15:54 2017 -0800
committer Mark Rathjen <mrathjen@google.com> Mon Jan 23 19:06:41 2017 -0800
tree e325af936fa989f2fe2762453c7a5be2dacc2dc7
parent ea617597c78e3a28304a85cfb3f790e1e36bca76

Resolve Android security comments for Android ID migration.

- Use 32 byte key instead of 16 byte.
- Use HMAC-SHA256 instead of SHA256 for ssaid generation.
- Update HMAC with all package signatures.
- Use delimiter in between digest arguments.

This change will cause the ssaid of non-legacy installed apps (apps installed
post Android ID migration OTA) to change after an uninstall and reinstall sequence.

Bug: 34395671
Test: Unit tests, CTS tests, Manual tests
Change-Id: I19dec57947368ee5000c2c630b1e4030d46a4ab3