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pgcrypto: Make it possible to disable built-in crypto

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When using OpenSSL and/or the underlying operating system in FIPS
mode no non-FIPS certified crypto implementations should be used.
While that is already possible by just not invoking the built-in
crypto in pgcrypto, this adds a GUC which prohibit the code from
being called.  This doesn't change the FIPS status of PostgreSQL
but can make it easier for sites which target FIPS compliance to
ensure that violations cannot occur.

Author: Daniel Gustafsson <daniel@yesql.se>
Author: Joe Conway <mail@joeconway.com>
Reviewed-by: Joe Conway <mail@joeconway.com>
Reviewed-by: Peter Eisentraut <peter@eisentraut.org>
Reviewed-by: Hayato Kuroda <kuroda.hayato@fujitsu.com>
Discussion: https://postgr.es/m/16b4a157-9ea1-44d0-b7b3-4c85df5de97b@joeconway.com
This commit is contained in:
Daniel Gustafsson
2025-01-24 14:25:08 +01:00
parent 924d89a354
commit 035f99cbeb
7 changed files with 121 additions and 0 deletions
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9
contrib/pgcrypto/px.h
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@@ -89,6 +89,12 @@
#define PXE_PGP_UNSUPPORTED_PUBALGO -122
#define PXE_PGP_MULTIPLE_SUBKEYS -123
typedef enum BuiltinCryptoOptions
{
BC_ON,
BC_OFF,
BC_FIPS,
} BuiltinCryptoOptions;
typedef struct px_digest PX_MD;
typedef struct px_alias PX_Alias;
@@ -96,6 +102,8 @@ typedef struct px_hmac PX_HMAC;
typedef struct px_cipher PX_Cipher;
typedef struct px_combo PX_Combo;
extern int builtin_crypto_enabled;
struct px_digest
{
unsigned (*result_size) (PX_MD *h);
@@ -183,6 +191,7 @@ void px_set_debug_handler(void (*handler) (const char *));
void px_memset(void *ptr, int c, size_t len);
bool CheckFIPSMode(void);
void CheckBuiltinCryptoMode(void);
#ifdef PX_DEBUG
void px_debug(const char *fmt,...) pg_attribute_printf(1, 2);