feat(android): measure the native PBKDF2 against the vector instead of guessing

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The Pascal loop takes 1736 ms on a desktop CPU, so several seconds on a phone - too slow for every unlock. SecretKeyFactory is native and roughly an order of magnitude faster, but PBEKeySpec takes a char[] and the provider picks the encoding, which was the reason for avoiding it.

The non-ASCII vector settles it on a real device: same key means the provider uses UTF-8 and we adopt it; a different key means the Pascal implementation stays. DecryptContainer keeps using the Pascal one until that measurement says otherwise.

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r-zakarya

2026-08-14 18:33:56 +01:00

parent 386bf74a2a

commit c607e26c4a

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