Adding upstream version 15.5.upstream/15.5

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 553 insertions, 0 deletions

diff --git a/contrib/uuid-ossp/uuid-ossp.c b/contrib/uuid-ossp/uuid-ossp.c
new file mode 100644
index 0000000..456a438
--- /dev/null
+++ b/contrib/uuid-ossp/uuid-ossp.c
@@ -0,0 +1,553 @@
+/*-------------------------------------------------------------------------
+ *
+ * UUID generation functions using the BSD, E2FS or OSSP UUID library
+ *
+ * Copyright (c) 2007-2022, PostgreSQL Global Development Group
+ *
+ * Portions Copyright (c) 2009 Andrew Gierth
+ *
+ * contrib/uuid-ossp/uuid-ossp.c
+ *
+ *-------------------------------------------------------------------------
+ */
+
+#include "postgres.h"
+
+#include "fmgr.h"
+#include "common/cryptohash.h"
+#include "common/sha1.h"
+#include "port/pg_bswap.h"
+#include "utils/builtins.h"
+#include "utils/uuid.h"
+
+/*
+ * It's possible that there's more than one uuid.h header file present.
+ * We expect configure to set the HAVE_ symbol for only the one we want.
+ *
+ * BSD includes a uuid_hash() function that conflicts with the one in
+ * builtins.h; we #define it out of the way.
+ */
+#define uuid_hash bsd_uuid_hash
+
+#if defined(HAVE_UUID_H)
+#include <uuid.h>
+#elif defined(HAVE_OSSP_UUID_H)
+#include <ossp/uuid.h>
+#elif defined(HAVE_UUID_UUID_H)
+#include <uuid/uuid.h>
+#else
+#error "please use configure's --with-uuid switch to select a UUID library"
+#endif
+
+#undef uuid_hash
+
+/* Check our UUID length against OSSP's; better both be 16 */
+#if defined(HAVE_UUID_OSSP) && (UUID_LEN != UUID_LEN_BIN)
+#error UUID length mismatch
+#endif
+
+/* Define some constants like OSSP's, to make the code more readable */
+#ifndef HAVE_UUID_OSSP
+#define UUID_MAKE_MC 0
+#define UUID_MAKE_V1 1
+#define UUID_MAKE_V2 2
+#define UUID_MAKE_V3 3
+#define UUID_MAKE_V4 4
+#define UUID_MAKE_V5 5
+#endif
+
+/*
+ * A DCE 1.1 compatible source representation of UUIDs, derived from
+ * the BSD implementation.  BSD already has this; OSSP doesn't need it.
+ */
+#ifdef HAVE_UUID_E2FS
+typedef struct
+{
+	uint32_t	time_low;
+	uint16_t	time_mid;
+	uint16_t	time_hi_and_version;
+	uint8_t		clock_seq_hi_and_reserved;
+	uint8_t		clock_seq_low;
+	uint8_t		node[6];
+} dce_uuid_t;
+#else
+#define dce_uuid_t uuid_t
+#endif
+
+/* If not OSSP, we need some endianness-manipulation macros */
+#ifndef HAVE_UUID_OSSP
+
+#define UUID_TO_NETWORK(uu) \
+do { \
+	uu.time_low = pg_hton32(uu.time_low); \
+	uu.time_mid = pg_hton16(uu.time_mid); \
+	uu.time_hi_and_version = pg_hton16(uu.time_hi_and_version); \
+} while (0)
+
+#define UUID_TO_LOCAL(uu) \
+do { \
+	uu.time_low = pg_ntoh32(uu.time_low); \
+	uu.time_mid = pg_ntoh16(uu.time_mid); \
+	uu.time_hi_and_version = pg_ntoh16(uu.time_hi_and_version); \
+} while (0)
+
+#define UUID_V3_OR_V5(uu, v) \
+do { \
+	uu.time_hi_and_version &= 0x0FFF; \
+	uu.time_hi_and_version |= (v << 12); \
+	uu.clock_seq_hi_and_reserved &= 0x3F; \
+	uu.clock_seq_hi_and_reserved |= 0x80; \
+} while(0)
+
+#endif							/* !HAVE_UUID_OSSP */
+
+PG_MODULE_MAGIC;
+
+PG_FUNCTION_INFO_V1(uuid_nil);
+PG_FUNCTION_INFO_V1(uuid_ns_dns);
+PG_FUNCTION_INFO_V1(uuid_ns_url);
+PG_FUNCTION_INFO_V1(uuid_ns_oid);
+PG_FUNCTION_INFO_V1(uuid_ns_x500);
+
+PG_FUNCTION_INFO_V1(uuid_generate_v1);
+PG_FUNCTION_INFO_V1(uuid_generate_v1mc);
+PG_FUNCTION_INFO_V1(uuid_generate_v3);
+PG_FUNCTION_INFO_V1(uuid_generate_v4);
+PG_FUNCTION_INFO_V1(uuid_generate_v5);
+
+#ifdef HAVE_UUID_OSSP
+
+static void
+pguuid_complain(uuid_rc_t rc)
+{
+	char	   *err = uuid_error(rc);
+
+	if (err != NULL)
+		ereport(ERROR,
+				(errcode(ERRCODE_EXTERNAL_ROUTINE_EXCEPTION),
+				 errmsg("OSSP uuid library failure: %s", err)));
+	else
+		ereport(ERROR,
+				(errcode(ERRCODE_EXTERNAL_ROUTINE_EXCEPTION),
+				 errmsg("OSSP uuid library failure: error code %d", rc)));
+}
+
+/*
+ * We create a uuid_t object just once per session and re-use it for all
+ * operations in this module.  OSSP UUID caches the system MAC address and
+ * other state in this object.  Reusing the object has a number of benefits:
+ * saving the cycles needed to fetch the system MAC address over and over,
+ * reducing the amount of entropy we draw from /dev/urandom, and providing a
+ * positive guarantee that successive generated V1-style UUIDs don't collide.
+ * (On a machine fast enough to generate multiple UUIDs per microsecond,
+ * or whatever the system's wall-clock resolution is, we'd otherwise risk
+ * collisions whenever random initialization of the uuid_t's clock sequence
+ * value chanced to produce duplicates.)
+ *
+ * However: when we're doing V3 or V5 UUID creation, uuid_make needs two
+ * uuid_t objects, one holding the namespace UUID and one for the result.
+ * It's unspecified whether it's safe to use the same uuid_t for both cases,
+ * so let's cache a second uuid_t for use as the namespace holder object.
+ */
+static uuid_t *
+get_cached_uuid_t(int which)
+{
+	static uuid_t *cached_uuid[2] = {NULL, NULL};
+
+	if (cached_uuid[which] == NULL)
+	{
+		uuid_rc_t	rc;
+
+		rc = uuid_create(&cached_uuid[which]);
+		if (rc != UUID_RC_OK)
+		{
+			cached_uuid[which] = NULL;
+			pguuid_complain(rc);
+		}
+	}
+	return cached_uuid[which];
+}
+
+static char *
+uuid_to_string(const uuid_t *uuid)
+{
+	char	   *buf = palloc(UUID_LEN_STR + 1);
+	void	   *ptr = buf;
+	size_t		len = UUID_LEN_STR + 1;
+	uuid_rc_t	rc;
+
+	rc = uuid_export(uuid, UUID_FMT_STR, &ptr, &len);
+	if (rc != UUID_RC_OK)
+		pguuid_complain(rc);
+
+	return buf;
+}
+
+
+static void
+string_to_uuid(const char *str, uuid_t *uuid)
+{
+	uuid_rc_t	rc;
+
+	rc = uuid_import(uuid, UUID_FMT_STR, str, UUID_LEN_STR + 1);
+	if (rc != UUID_RC_OK)
+		pguuid_complain(rc);
+}
+
+
+static Datum
+special_uuid_value(const char *name)
+{
+	uuid_t	   *uuid = get_cached_uuid_t(0);
+	char	   *str;
+	uuid_rc_t	rc;
+
+	rc = uuid_load(uuid, name);
+	if (rc != UUID_RC_OK)
+		pguuid_complain(rc);
+	str = uuid_to_string(uuid);
+
+	return DirectFunctionCall1(uuid_in, CStringGetDatum(str));
+}
+
+/* len is unused with OSSP, but we want to have the same number of args */
+static Datum
+uuid_generate_internal(int mode, const uuid_t *ns, const char *name, int len)
+{
+	uuid_t	   *uuid = get_cached_uuid_t(0);
+	char	   *str;
+	uuid_rc_t	rc;
+
+	rc = uuid_make(uuid, mode, ns, name);
+	if (rc != UUID_RC_OK)
+		pguuid_complain(rc);
+	str = uuid_to_string(uuid);
+
+	return DirectFunctionCall1(uuid_in, CStringGetDatum(str));
+}
+
+
+static Datum
+uuid_generate_v35_internal(int mode, pg_uuid_t *ns, text *name)
+{
+	uuid_t	   *ns_uuid = get_cached_uuid_t(1);
+
+	string_to_uuid(DatumGetCString(DirectFunctionCall1(uuid_out,
+													   UUIDPGetDatum(ns))),
+				   ns_uuid);
+
+	return uuid_generate_internal(mode,
+								  ns_uuid,
+								  text_to_cstring(name),
+								  0);
+}
+
+#else							/* !HAVE_UUID_OSSP */
+
+static Datum
+uuid_generate_internal(int v, unsigned char *ns, const char *ptr, int len)
+{
+	char		strbuf[40];
+
+	switch (v)
+	{
+		case 0:					/* constant-value uuids */
+			strlcpy(strbuf, ptr, 37);
+			break;
+
+		case 1:					/* time/node-based uuids */
+			{
+#ifdef HAVE_UUID_E2FS
+				uuid_t		uu;
+
+				uuid_generate_time(uu);
+				uuid_unparse(uu, strbuf);
+
+				/*
+				 * PTR, if set, replaces the trailing characters of the uuid;
+				 * this is to support v1mc, where a random multicast MAC is
+				 * used instead of the physical one
+				 */
+				if (ptr && len <= 36)
+					strcpy(strbuf + (36 - len), ptr);
+#else							/* BSD */
+				uuid_t		uu;
+				uint32_t	status = uuid_s_ok;
+				char	   *str = NULL;
+
+				uuid_create(&uu, &status);
+
+				if (status == uuid_s_ok)
+				{
+					uuid_to_string(&uu, &str, &status);
+					if (status == uuid_s_ok)
+					{
+						strlcpy(strbuf, str, 37);
+
+						/*
+						 * In recent NetBSD, uuid_create() has started
+						 * producing v4 instead of v1 UUIDs.  Check the
+						 * version field and complain if it's not v1.
+						 */
+						if (strbuf[14] != '1')
+							ereport(ERROR,
+									(errcode(ERRCODE_EXTERNAL_ROUTINE_EXCEPTION),
+							/* translator: %c will be a hex digit */
+									 errmsg("uuid_create() produced a version %c UUID instead of the expected version 1",
+											strbuf[14])));
+
+						/*
+						 * PTR, if set, replaces the trailing characters of
+						 * the uuid; this is to support v1mc, where a random
+						 * multicast MAC is used instead of the physical one
+						 */
+						if (ptr && len <= 36)
+							strcpy(strbuf + (36 - len), ptr);
+					}
+					if (str)
+						free(str);
+				}
+
+				if (status != uuid_s_ok)
+					ereport(ERROR,
+							(errcode(ERRCODE_EXTERNAL_ROUTINE_EXCEPTION),
+							 errmsg("uuid library failure: %d",
+									(int) status)));
+#endif
+				break;
+			}
+
+		case 3:					/* namespace-based MD5 uuids */
+		case 5:					/* namespace-based SHA1 uuids */
+			{
+				dce_uuid_t	uu;
+#ifdef HAVE_UUID_BSD
+				uint32_t	status = uuid_s_ok;
+				char	   *str = NULL;
+#endif
+
+				if (v == 3)
+				{
+					pg_cryptohash_ctx *ctx = pg_cryptohash_create(PG_MD5);
+
+					if (pg_cryptohash_init(ctx) < 0)
+						elog(ERROR, "could not initialize %s context: %s", "MD5",
+							 pg_cryptohash_error(ctx));
+					if (pg_cryptohash_update(ctx, ns, sizeof(uu)) < 0 ||
+						pg_cryptohash_update(ctx, (unsigned char *) ptr, len) < 0)
+						elog(ERROR, "could not update %s context: %s", "MD5",
+							 pg_cryptohash_error(ctx));
+					/* we assume sizeof MD5 result is 16, same as UUID size */
+					if (pg_cryptohash_final(ctx, (unsigned char *) &uu,
+											sizeof(uu)) < 0)
+						elog(ERROR, "could not finalize %s context: %s", "MD5",
+							 pg_cryptohash_error(ctx));
+					pg_cryptohash_free(ctx);
+				}
+				else
+				{
+					pg_cryptohash_ctx *ctx = pg_cryptohash_create(PG_SHA1);
+					unsigned char sha1result[SHA1_DIGEST_LENGTH];
+
+					if (pg_cryptohash_init(ctx) < 0)
+						elog(ERROR, "could not initialize %s context: %s", "SHA1",
+							 pg_cryptohash_error(ctx));
+					if (pg_cryptohash_update(ctx, ns, sizeof(uu)) < 0 ||
+						pg_cryptohash_update(ctx, (unsigned char *) ptr, len) < 0)
+						elog(ERROR, "could not update %s context: %s", "SHA1",
+							 pg_cryptohash_error(ctx));
+					if (pg_cryptohash_final(ctx, sha1result, sizeof(sha1result)) < 0)
+						elog(ERROR, "could not finalize %s context: %s", "SHA1",
+							 pg_cryptohash_error(ctx));
+					pg_cryptohash_free(ctx);
+
+					memcpy(&uu, sha1result, sizeof(uu));
+				}
+
+				/* the calculated hash is using local order */
+				UUID_TO_NETWORK(uu);
+				UUID_V3_OR_V5(uu, v);
+
+#ifdef HAVE_UUID_E2FS
+				/* uuid_unparse expects local order */
+				UUID_TO_LOCAL(uu);
+				uuid_unparse((unsigned char *) &uu, strbuf);
+#else							/* BSD */
+				uuid_to_string(&uu, &str, &status);
+
+				if (status == uuid_s_ok)
+					strlcpy(strbuf, str, 37);
+
+				if (str)
+					free(str);
+
+				if (status != uuid_s_ok)
+					ereport(ERROR,
+							(errcode(ERRCODE_EXTERNAL_ROUTINE_EXCEPTION),
+							 errmsg("uuid library failure: %d",
+									(int) status)));
+#endif
+				break;
+			}
+
+		case 4:					/* random uuid */
+		default:
+			{
+#ifdef HAVE_UUID_E2FS
+				uuid_t		uu;
+
+				uuid_generate_random(uu);
+				uuid_unparse(uu, strbuf);
+#else							/* BSD */
+				snprintf(strbuf, sizeof(strbuf),
+						 "%08lx-%04x-%04x-%04x-%04x%08lx",
+						 (unsigned long) arc4random(),
+						 (unsigned) (arc4random() & 0xffff),
+						 (unsigned) ((arc4random() & 0xfff) | 0x4000),
+						 (unsigned) ((arc4random() & 0x3fff) | 0x8000),
+						 (unsigned) (arc4random() & 0xffff),
+						 (unsigned long) arc4random());
+#endif
+				break;
+			}
+	}
+
+	return DirectFunctionCall1(uuid_in, CStringGetDatum(strbuf));
+}
+
+#endif							/* HAVE_UUID_OSSP */
+
+
+Datum
+uuid_nil(PG_FUNCTION_ARGS)
+{
+#ifdef HAVE_UUID_OSSP
+	return special_uuid_value("nil");
+#else
+	return uuid_generate_internal(0, NULL,
+								  "00000000-0000-0000-0000-000000000000", 36);
+#endif
+}
+
+
+Datum
+uuid_ns_dns(PG_FUNCTION_ARGS)
+{
+#ifdef HAVE_UUID_OSSP
+	return special_uuid_value("ns:DNS");
+#else
+	return uuid_generate_internal(0, NULL,
+								  "6ba7b810-9dad-11d1-80b4-00c04fd430c8", 36);
+#endif
+}
+
+
+Datum
+uuid_ns_url(PG_FUNCTION_ARGS)
+{
+#ifdef HAVE_UUID_OSSP
+	return special_uuid_value("ns:URL");
+#else
+	return uuid_generate_internal(0, NULL,
+								  "6ba7b811-9dad-11d1-80b4-00c04fd430c8", 36);
+#endif
+}
+
+
+Datum
+uuid_ns_oid(PG_FUNCTION_ARGS)
+{
+#ifdef HAVE_UUID_OSSP
+	return special_uuid_value("ns:OID");
+#else
+	return uuid_generate_internal(0, NULL,
+								  "6ba7b812-9dad-11d1-80b4-00c04fd430c8", 36);
+#endif
+}
+
+
+Datum
+uuid_ns_x500(PG_FUNCTION_ARGS)
+{
+#ifdef HAVE_UUID_OSSP
+	return special_uuid_value("ns:X500");
+#else
+	return uuid_generate_internal(0, NULL,
+								  "6ba7b814-9dad-11d1-80b4-00c04fd430c8", 36);
+#endif
+}
+
+
+Datum
+uuid_generate_v1(PG_FUNCTION_ARGS)
+{
+	return uuid_generate_internal(UUID_MAKE_V1, NULL, NULL, 0);
+}
+
+
+Datum
+uuid_generate_v1mc(PG_FUNCTION_ARGS)
+{
+#ifdef HAVE_UUID_OSSP
+	char	   *buf = NULL;
+#elif defined(HAVE_UUID_E2FS)
+	char		strbuf[40];
+	char	   *buf;
+	uuid_t		uu;
+
+	uuid_generate_random(uu);
+
+	/* set IEEE802 multicast and local-admin bits */
+	((dce_uuid_t *) &uu)->node[0] |= 0x03;
+
+	uuid_unparse(uu, strbuf);
+	buf = strbuf + 24;
+#else							/* BSD */
+	char		buf[16];
+
+	/* set IEEE802 multicast and local-admin bits */
+	snprintf(buf, sizeof(buf), "-%04x%08lx",
+			 (unsigned) ((arc4random() & 0xffff) | 0x0300),
+			 (unsigned long) arc4random());
+#endif
+
+	return uuid_generate_internal(UUID_MAKE_V1 | UUID_MAKE_MC, NULL,
+								  buf, 13);
+}
+
+
+Datum
+uuid_generate_v3(PG_FUNCTION_ARGS)
+{
+	pg_uuid_t  *ns = PG_GETARG_UUID_P(0);
+	text	   *name = PG_GETARG_TEXT_PP(1);
+
+#ifdef HAVE_UUID_OSSP
+	return uuid_generate_v35_internal(UUID_MAKE_V3, ns, name);
+#else
+	return uuid_generate_internal(UUID_MAKE_V3, (unsigned char *) ns,
+								  VARDATA_ANY(name), VARSIZE_ANY_EXHDR(name));
+#endif
+}
+
+
+Datum
+uuid_generate_v4(PG_FUNCTION_ARGS)
+{
+	return uuid_generate_internal(UUID_MAKE_V4, NULL, NULL, 0);
+}
+
+
+Datum
+uuid_generate_v5(PG_FUNCTION_ARGS)
+{
+	pg_uuid_t  *ns = PG_GETARG_UUID_P(0);
+	text	   *name = PG_GETARG_TEXT_PP(1);
+
+#ifdef HAVE_UUID_OSSP
+	return uuid_generate_v35_internal(UUID_MAKE_V5, ns, name);
+#else
+	return uuid_generate_internal(UUID_MAKE_V5, (unsigned char *) ns,
+								  VARDATA_ANY(name), VARSIZE_ANY_EXHDR(name));
+#endif
+}