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Improve some code around cryptohash functions

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This adjusts some code related to recent changes for cryptohash
functions:
- Add a variable in md5.h to track down the size of a computed result,
moved from pgcrypto.  Note that pg_md5_hash() assumed a result of this
size already.
- Call explicit_bzero() on the hashed data when freeing the context for
fallback implementations.  For MD5, particularly, it would be annoying
to leave some non-zeroed data around.
- Clean up some code related to recent changes of uuid-ossp.  .gitignore
still included md5.c and a comment was incorrect.

Discussion: https://postgr.es/m/X9HXKTgrvJvYO7Oh@paquier.xyz
This commit is contained in:
Michael Paquier
2020-12-14 12:38:13 +09:00
parent df9274adf3
commit 9b584953e7
6 changed files with 27 additions and 8 deletions
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4
contrib/pgcrypto/internal.c
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@ -41,10 +41,6 @@
#include "common/cryptohash.h"
#include "common/md5.h"
#ifndef MD5_DIGEST_LENGTH
#define MD5_DIGEST_LENGTH 16
#endif
#ifndef SHA1_DIGEST_LENGTH
#ifdef SHA1_RESULTLEN
#define SHA1_DIGEST_LENGTH SHA1_RESULTLEN