tree 23e9416c540b7df40085aa9a74c8bd98232ac78b
parent 2b450e3a01e138598e31dbb0c0f8b8a4182e92f7
author Gilles Peskine <Gilles.Peskine@arm.com> 1530181279 +0200
committer itayzafrir <itay.zafrir@arm.com> 1536759671 +0300

psa_asymmetric_sign: consistently fill unused output with '!'

Fill the unused part of the output buffer with '!', for consistency
with hash and mac.

On error, set the output length to the output buffer size and fill the
output buffer with '!', again for consistency with hash and mac. This
way an invalid output is more visible in a memory dump.

Restructure the error paths so that there is a single place where the
unused part of the output buffer is filled.

Also remove a redundant initialization of *signature_length to 0.