tree 20edd4f3dc46b4deda7539cb1f5ec6f1efdd503c
parent a75a4591430919a6eb3d430aca396044fe3816d4
author Hanno Becker <hanno.becker@arm.com> 1508944029 +0100
committer Hanno Becker <hanno.becker@arm.com> 1508944263 +0100

Make mpi_read_binary time constant

This commit modifies mpi_read_binary to always allocate the minimum number of
limbs required to hold the entire buffer provided to the function, regardless of
its content. Previously, leading zero bytes in the input data were detected and
used to reduce memory footprint and time, but this non-constant behavior turned
out to be non-tolerable for the cryptographic applications this function is used
for.