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Michael Paquier b3bb7d12af Remove hardcoded dependency to cryptohash type in the internals of SCRAM ... SCRAM_KEY_LEN was a variable used in the internal routines of SCRAM to size a set of fixed-sized arrays used in the SHA and HMAC computations during the SASL exchange or when building a SCRAM password. This had a hard dependency on SHA-256, reducing the flexibility of SCRAM when it comes to the addition of more hash methods. A second issue was that SHA-256 is assumed as the cryptohash method to use all the time. This commit renames SCRAM_KEY_LEN to a more generic SCRAM_KEY_MAX_LEN, which is used as the size of the buffers used by the internal routines of SCRAM. This is aimed at tracking centrally the maximum size necessary for all the hash methods supported by SCRAM. A global variable has the advantage of keeping the code in its simplest form, reducing the need of more alloc/free logic for all the buffers used in the hash calculations. A second change is that the key length (SHA digest length) and hash types are now tracked by the state data in the backend and the frontend, the common portions being extended to handle these as arguments by the internal routines of SCRAM. There are a few RFC proposals floating around to extend the SCRAM protocol, including some to use stronger cryptohash algorithms, so this lifts some of the existing restrictions in the code. The code in charge of parsing and building SCRAM secrets is extended to rely on the key length and on the cryptohash type used for the exchange, assuming currently that only SHA-256 is supported for the moment. Note that the mock authentication simply enforces SHA-256. Author: Michael Paquier Reviewed-by: Peter Eisentraut, Jonathan Katz Discussion: https://postgr.es/m/Y5k3Qiweo/1g9CG6@paquier.xyz		3 years ago
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backend	Remove hardcoded dependency to cryptohash type in the internals of SCRAM	3 years ago
bin	Fix typo in comment	3 years ago
common	Remove hardcoded dependency to cryptohash type in the internals of SCRAM	3 years ago
fe_utils	Non-decimal integer literals	3 years ago
include	Remove hardcoded dependency to cryptohash type in the internals of SCRAM	3 years ago
interfaces	Remove hardcoded dependency to cryptohash type in the internals of SCRAM	3 years ago
makefiles	meson: Add basic PGXS compatibility	3 years ago
pl	Allow building with MSVC and Strawberry perl	3 years ago
port	meson: Basic cygwin support	3 years ago
template	…
test	Fix bit-rotted planner test case.	3 years ago
timezone	Remove unneeded includes of <sys/stat.h>	3 years ago
tools	Create infrastructure for "soft" error reporting.	3 years ago
tutorial	Doc: sync src/tutorial/basics.source with SGML documentation.	3 years ago
.gitignore	…
DEVELOPERS	…
Makefile	…
Makefile.global.in	autoconf: Move export_dynamic determination to configure	3 years ago
Makefile.shlib	…
meson.build	meson: Add basic PGXS compatibility	3 years ago
nls-global.mk	…