1 files changed, 0 insertions, 158 deletions
diff --git a/src/backend/utils/misc/backend_random.c b/src/backend/utils/misc/backend_random.c
deleted file mode 100644
index a64f3ac3980..00000000000
--- a/src/backend/utils/misc/backend_random.c
+++ /dev/null
@@ -1,158 +0,0 @@
-/*-------------------------------------------------------------------------
- *
- * backend_random.c
- *	  Backend random number generation routine.
- *
- * pg_backend_random() function fills a buffer with random bytes. Normally,
- * it is just a thin wrapper around pg_strong_random(), but when compiled
- * with --disable-strong-random, we provide a built-in implementation.
- *
- * This function is used for generating nonces in authentication, and for
- * random salt generation in pgcrypto. The built-in implementation is not
- * cryptographically strong, but if the user asked for it, we'll go ahead
- * and use it anyway.
- *
- * The built-in implementation uses the standard erand48 algorithm, with
- * a seed shared between all backends.
- *
- * Portions Copyright (c) 1996-2018, PostgreSQL Global Development Group
- * Portions Copyright (c) 1994, Regents of the University of California
- *
- *
- * IDENTIFICATION
- *	  src/backend/utils/misc/backend_random.c
- *
- *-------------------------------------------------------------------------
- */
-
-#include "postgres.h"
-
-#include <sys/time.h>
-
-#include "miscadmin.h"
-#include "storage/lwlock.h"
-#include "storage/shmem.h"
-#include "utils/backend_random.h"
-#include "utils/timestamp.h"
-
-#ifdef HAVE_STRONG_RANDOM
-
-Size
-BackendRandomShmemSize(void)
-{
-	return 0;
-}
-
-void
-BackendRandomShmemInit(void)
-{
-	/* do nothing */
-}
-
-bool
-pg_backend_random(char *dst, int len)
-{
-	/* should not be called in postmaster */
-	Assert(IsUnderPostmaster || !IsPostmasterEnvironment);
-
-	return pg_strong_random(dst, len);
-}
-
-#else
-
-/*
- * Seed for the PRNG, stored in shared memory.
- *
- * Protected by BackendRandomLock.
- */
-typedef struct
-{
-	bool		initialized;
-	unsigned short seed[3];
-}			BackendRandomShmemStruct;
-
-static BackendRandomShmemStruct * BackendRandomShmem;
-
-Size
-BackendRandomShmemSize(void)
-{
-	return sizeof(BackendRandomShmemStruct);
-}
-
-void
-BackendRandomShmemInit(void)
-{
-	bool		found;
-
-	BackendRandomShmem = (BackendRandomShmemStruct *)
-		ShmemInitStruct("Backend PRNG state",
-						BackendRandomShmemSize(),
-						&found);
-
-	if (!IsUnderPostmaster)
-	{
-		Assert(!found);
-
-		BackendRandomShmem->initialized = false;
-	}
-	else
-		Assert(found);
-}
-
-bool
-pg_backend_random(char *dst, int len)
-{
-	int			i;
-	char	   *end = dst + len;
-
-	/* should not be called in postmaster */
-	Assert(IsUnderPostmaster || !IsPostmasterEnvironment);
-
-	LWLockAcquire(BackendRandomLock, LW_EXCLUSIVE);
-
-	/*
-	 * Seed the PRNG on the first use.
-	 */
-	if (!BackendRandomShmem->initialized)
-	{
-		struct timeval now;
-
-		gettimeofday(&now, NULL);
-
-		BackendRandomShmem->seed[0] = now.tv_sec;
-		BackendRandomShmem->seed[1] = (unsigned short) (now.tv_usec);
-		BackendRandomShmem->seed[2] = (unsigned short) (now.tv_usec >> 16);
-
-		/*
-		 * Mix in the cancel key, generated by the postmaster. This adds what
-		 * little entropy the postmaster had to the seed.
-		 */
-		BackendRandomShmem->seed[0] ^= (MyCancelKey);
-		BackendRandomShmem->seed[1] ^= (MyCancelKey >> 16);
-
-		BackendRandomShmem->initialized = true;
-	}
-
-	for (i = 0; dst < end; i++)
-	{
-		uint32		r;
-		int			j;
-
-		/*
-		 * pg_jrand48 returns a 32-bit integer. Fill the next 4 bytes from it.
-		 */
-		r = (uint32) pg_jrand48(BackendRandomShmem->seed);
-
-		for (j = 0; j < 4 && dst < end; j++)
-		{
-			*(dst++) = (char) (r & 0xFF);
-			r >>= 8;
-		}
-	}
-	LWLockRelease(BackendRandomLock);
-
-	return true;
-}
-
-
-#endif							/* HAVE_STRONG_RANDOM */