cypherpunks authored Nov 11, 2015 and Nick Mathewson committed Dec 09, 2015

The hidden service descriptor cache (rendcache) tests use digest maps
which expect keys to have a length of DIGEST_LEN.

Because the tests use key strings with a length lower than DIGEST_LEN,
the internal copy operation reads outside the key strings which leads to
buffer over-reads.

The issue is resolved by using character arrays with a size of
DIGEST_LEN.

Patch on ade50058.