tree bc8fc2b986292c05c4034584adb96ad7dc241b2c
parent 2fe5db87d5702a4f34f6fd28acaa0f5961584e93
author Paul Elliott <paul.elliott@arm.com> 1626976104 +0100
committer Paul Elliott <paul.elliott@arm.com> 1626976340 +0100

Add safety check to chachapoly finish

Previous code checked that the buffer was big enough for the tag size
for the given algorithm, however chachapoly finish expects a 16 byte
buffer passed in, no matter what. If we start supporting smaller
chachapoly tags in the future, this could potentially end up in buffer
overflow, so add a safety check.

Signed-off-by: Paul Elliott <paul.elliott@arm.com>