commit 6d72ff9e7935dc1861c1fbfd25a847456289bcef
author Gilles Peskine <Gilles.Peskine@arm.com> Tue Aug 21 14:55:08 2018 +0200
committer Gilles Peskine <Gilles.Peskine@arm.com> Wed Oct 17 13:54:47 2018 +0200
tree a8a660a6f314527b2bb60da0f10bff4591416239
parent e1f2d7d1ac985df3c5330fe33479e77fff58cca6

Document that the minimum truncated MAC length is implementation-defined

include/psa/crypto.h

diff --git a/include/psa/crypto.h b/include/psa/crypto.h
index 3d99933..48c9713 100644
--- a/include/psa/crypto.h
+++ b/include/psa/crypto.h
@@ -788,6 +788,10 @@
  *                      is true). This may be a truncated or untruncated
  *                      MAC algorithm.
  * \param mac_length    Desired length of the truncated MAC in bytes.
+ *                      This must be at most the full length of the MAC
+ *                      and must be at least an implementation-specified
+ *                      minimum. The implementation-specified minimum
+ *                      shall not be zero.
  *
  * \return              The corresponding MAC algorithm with the specified
  *                      length.