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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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access	Static assertions cleanup	3 years ago
backup	Static assertions cleanup	3 years ago
bootstrap	Order getopt arguments	3 years ago
catalog	Static assertions cleanup	3 years ago
commands	Add grantable MAINTAIN privilege and pg_maintain role.	3 years ago
executor	Static assertions cleanup	3 years ago
foreign	Rename SetSingleFuncCall() to InitMaterializedSRF()	3 years ago
jit	Replace SQLValueFunction by COERCE_SQL_SYNTAX	3 years ago
lib	Add doubly linked count list implementation	3 years ago
libpq	Remove hardcoded dependency to cryptohash type in the internals of SCRAM	3 years ago
main	Add workaround to make ubsan and ps_status.c compatible	3 years ago
nodes	Create infrastructure for "soft" error reporting.	3 years ago
optimizer	Remove pessimistic cost penalization from Incremental Sort	3 years ago
parser	Fix inability to reference CYCLE column from inside its CTE.	3 years ago
partitioning	Move PartitioPruneInfo out of plan nodes into PlannedStmt	3 years ago
po	meson: Add initial version of meson based build system	3 years ago
port	Static assertions cleanup	3 years ago
postmaster	Order getopt arguments	3 years ago
regex	Remove uses of register due to incompatibility with C++17 and up	3 years ago
replication	Avoid unnecessary streaming of transactions during logical replication.	3 years ago
rewrite	Update outdated comment in ApplyRetrieveRule	3 years ago
snowball	meson: Add support for building with precompiled headers	3 years ago
statistics	Stop accessing checkAsUser via RTE in some cases	3 years ago
storage	Expose some information about backend subxact status.	3 years ago
tcop	Speed up creation of command completion tags	3 years ago
tsearch	Add comments and a missing CHECK_FOR_INTERRUPTS in ts_headline.	3 years ago
utils	Expose some information about backend subxact status.	3 years ago
.gitignore	…
Makefile	autoconf: Move export_dynamic determination to configure	3 years ago
common.mk	Blind attempt to fix LLVM dependency in the backend	3 years ago
meson.build	meson: Add support for building with precompiled headers	3 years ago
nls.mk	…