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-rw-r--r--libuuid/src/gen_uuid.c608
1 files changed, 608 insertions, 0 deletions
diff --git a/libuuid/src/gen_uuid.c b/libuuid/src/gen_uuid.c
new file mode 100644
index 0000000..805b40d
--- /dev/null
+++ b/libuuid/src/gen_uuid.c
@@ -0,0 +1,608 @@
+/*
+ * gen_uuid.c --- generate a DCE-compatible uuid
+ *
+ * Copyright (C) 1996, 1997, 1998, 1999 Theodore Ts'o.
+ *
+ * %Begin-Header%
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, and the entire permission notice in its entirety,
+ * including the disclaimer of warranties.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote
+ * products derived from this software without specific prior
+ * written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, ALL OF
+ * WHICH ARE HEREBY DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
+ * USE OF THIS SOFTWARE, EVEN IF NOT ADVISED OF THE POSSIBILITY OF SUCH
+ * DAMAGE.
+ * %End-Header%
+ */
+
+#ifdef _WIN32
+#define _WIN32_WINNT 0x0500
+#include <windows.h>
+#define UUID MYUUID
+#endif
+#include <stdio.h>
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+#ifdef HAVE_STDLIB_H
+#include <stdlib.h>
+#endif
+#include <string.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <limits.h>
+#include <sys/types.h>
+#ifdef HAVE_SYS_TIME_H
+#include <sys/time.h>
+#endif
+#include <sys/stat.h>
+#ifdef HAVE_SYS_FILE_H
+#include <sys/file.h>
+#endif
+#ifdef HAVE_SYS_IOCTL_H
+#include <sys/ioctl.h>
+#endif
+#ifdef HAVE_SYS_SOCKET_H
+#include <sys/socket.h>
+#endif
+#ifdef HAVE_SYS_UN_H
+#include <sys/un.h>
+#endif
+#ifdef HAVE_SYS_SOCKIO_H
+#include <sys/sockio.h>
+#endif
+#ifdef HAVE_NET_IF_H
+#include <net/if.h>
+#endif
+#ifdef HAVE_NETINET_IN_H
+#include <netinet/in.h>
+#endif
+#ifdef HAVE_NET_IF_DL_H
+#include <net/if_dl.h>
+#endif
+#if defined(__linux__) && defined(HAVE_SYS_SYSCALL_H)
+#include <sys/syscall.h>
+#endif
+
+#include "all-io.h"
+#include "uuidP.h"
+#include "uuidd.h"
+#include "randutils.h"
+#include "strutils.h"
+#include "c.h"
+#include "md5.h"
+#include "sha1.h"
+
+#ifdef HAVE_TLS
+#define THREAD_LOCAL static __thread
+#else
+#define THREAD_LOCAL static
+#endif
+
+#ifdef _WIN32
+static void gettimeofday (struct timeval *tv, void *dummy)
+{
+ FILETIME ftime;
+ uint64_t n;
+
+ GetSystemTimeAsFileTime (&ftime);
+ n = (((uint64_t) ftime.dwHighDateTime << 32)
+ + (uint64_t) ftime.dwLowDateTime);
+ if (n) {
+ n /= 10;
+ n -= ((369 * 365 + 89) * (uint64_t) 86400) * 1000000;
+ }
+
+ tv->tv_sec = n / 1000000;
+ tv->tv_usec = n % 1000000;
+}
+
+static int getuid (void)
+{
+ return 1;
+}
+#endif
+
+/*
+ * Get the ethernet hardware address, if we can find it...
+ *
+ * XXX for a windows version, probably should use GetAdaptersInfo:
+ * http://www.codeguru.com/cpp/i-n/network/networkinformation/article.php/c5451
+ * commenting out get_node_id just to get gen_uuid to compile under windows
+ * is not the right way to go!
+ */
+static int get_node_id(unsigned char *node_id)
+{
+#ifdef HAVE_NET_IF_H
+ int sd;
+ struct ifreq ifr, *ifrp;
+ struct ifconf ifc;
+ char buf[1024];
+ int n, i;
+ unsigned char *a = NULL;
+#ifdef HAVE_NET_IF_DL_H
+ struct sockaddr_dl *sdlp;
+#endif
+
+/*
+ * BSD 4.4 defines the size of an ifreq to be
+ * max(sizeof(ifreq), sizeof(ifreq.ifr_name)+ifreq.ifr_addr.sa_len
+ * However, under earlier systems, sa_len isn't present, so the size is
+ * just sizeof(struct ifreq)
+ */
+#ifdef HAVE_SA_LEN
+#define ifreq_size(i) max(sizeof(struct ifreq),\
+ sizeof((i).ifr_name)+(i).ifr_addr.sa_len)
+#else
+#define ifreq_size(i) sizeof(struct ifreq)
+#endif /* HAVE_SA_LEN */
+
+ sd = socket(AF_INET, SOCK_DGRAM, IPPROTO_IP);
+ if (sd < 0) {
+ return -1;
+ }
+ memset(buf, 0, sizeof(buf));
+ ifc.ifc_len = sizeof(buf);
+ ifc.ifc_buf = buf;
+ if (ioctl (sd, SIOCGIFCONF, (char *)&ifc) < 0) {
+ close(sd);
+ return -1;
+ }
+ n = ifc.ifc_len;
+ for (i = 0; i < n; i+= ifreq_size(*ifrp) ) {
+ ifrp = (struct ifreq *)((char *) ifc.ifc_buf+i);
+ strncpy(ifr.ifr_name, ifrp->ifr_name, IFNAMSIZ);
+#ifdef SIOCGIFHWADDR
+ if (ioctl(sd, SIOCGIFHWADDR, &ifr) < 0)
+ continue;
+ a = (unsigned char *) &ifr.ifr_hwaddr.sa_data;
+#else
+#ifdef SIOCGENADDR
+ if (ioctl(sd, SIOCGENADDR, &ifr) < 0)
+ continue;
+ a = (unsigned char *) ifr.ifr_enaddr;
+#else
+#ifdef HAVE_NET_IF_DL_H
+ sdlp = (struct sockaddr_dl *) &ifrp->ifr_addr;
+ if ((sdlp->sdl_family != AF_LINK) || (sdlp->sdl_alen != 6))
+ continue;
+ a = (unsigned char *) &sdlp->sdl_data[sdlp->sdl_nlen];
+#else
+ /*
+ * XXX we don't have a way of getting the hardware
+ * address
+ */
+ close(sd);
+ return 0;
+#endif /* HAVE_NET_IF_DL_H */
+#endif /* SIOCGENADDR */
+#endif /* SIOCGIFHWADDR */
+ if (a == NULL || (!a[0] && !a[1] && !a[2] && !a[3] && !a[4] && !a[5]))
+ continue;
+ if (node_id) {
+ memcpy(node_id, a, 6);
+ close(sd);
+ return 1;
+ }
+ }
+ close(sd);
+#endif
+ return 0;
+}
+
+/* Assume that the gettimeofday() has microsecond granularity */
+#define MAX_ADJUSTMENT 10
+
+/*
+ * Get clock from global sequence clock counter.
+ *
+ * Return -1 if the clock counter could not be opened/locked (in this case
+ * pseudorandom value is returned in @ret_clock_seq), otherwise return 0.
+ */
+static int get_clock(uint32_t *clock_high, uint32_t *clock_low,
+ uint16_t *ret_clock_seq, int *num)
+{
+ THREAD_LOCAL int adjustment = 0;
+ THREAD_LOCAL struct timeval last = {0, 0};
+ THREAD_LOCAL int state_fd = -2;
+ THREAD_LOCAL FILE *state_f;
+ THREAD_LOCAL uint16_t clock_seq;
+ struct timeval tv;
+ uint64_t clock_reg;
+ mode_t save_umask;
+ int len;
+ int ret = 0;
+
+ if (state_fd == -1)
+ ret = -1;
+
+ if (state_fd == -2) {
+ save_umask = umask(0);
+ state_fd = open(LIBUUID_CLOCK_FILE, O_RDWR|O_CREAT|O_CLOEXEC, 0660);
+ (void) umask(save_umask);
+ if (state_fd != -1) {
+ state_f = fdopen(state_fd, "r+" UL_CLOEXECSTR);
+ if (!state_f) {
+ close(state_fd);
+ state_fd = -1;
+ ret = -1;
+ }
+ }
+ else
+ ret = -1;
+ }
+ if (state_fd >= 0) {
+ rewind(state_f);
+ while (flock(state_fd, LOCK_EX) < 0) {
+ if ((errno == EAGAIN) || (errno == EINTR))
+ continue;
+ fclose(state_f);
+ close(state_fd);
+ state_fd = -1;
+ ret = -1;
+ break;
+ }
+ }
+ if (state_fd >= 0) {
+ unsigned int cl;
+ unsigned long tv1, tv2;
+ int a;
+
+ if (fscanf(state_f, "clock: %04x tv: %lu %lu adj: %d\n",
+ &cl, &tv1, &tv2, &a) == 4) {
+ clock_seq = cl & 0x3FFF;
+ last.tv_sec = tv1;
+ last.tv_usec = tv2;
+ adjustment = a;
+ }
+ }
+
+ if ((last.tv_sec == 0) && (last.tv_usec == 0)) {
+ ul_random_get_bytes(&clock_seq, sizeof(clock_seq));
+ clock_seq &= 0x3FFF;
+ gettimeofday(&last, NULL);
+ last.tv_sec--;
+ }
+
+try_again:
+ gettimeofday(&tv, NULL);
+ if ((tv.tv_sec < last.tv_sec) ||
+ ((tv.tv_sec == last.tv_sec) &&
+ (tv.tv_usec < last.tv_usec))) {
+ clock_seq = (clock_seq+1) & 0x3FFF;
+ adjustment = 0;
+ last = tv;
+ } else if ((tv.tv_sec == last.tv_sec) &&
+ (tv.tv_usec == last.tv_usec)) {
+ if (adjustment >= MAX_ADJUSTMENT)
+ goto try_again;
+ adjustment++;
+ } else {
+ adjustment = 0;
+ last = tv;
+ }
+
+ clock_reg = tv.tv_usec*10 + adjustment;
+ clock_reg += ((uint64_t) tv.tv_sec)*10000000;
+ clock_reg += (((uint64_t) 0x01B21DD2) << 32) + 0x13814000;
+
+ if (num && (*num > 1)) {
+ adjustment += *num - 1;
+ last.tv_usec += adjustment / 10;
+ adjustment = adjustment % 10;
+ last.tv_sec += last.tv_usec / 1000000;
+ last.tv_usec = last.tv_usec % 1000000;
+ }
+
+ if (state_fd >= 0) {
+ rewind(state_f);
+ len = fprintf(state_f,
+ "clock: %04x tv: %016ld %08ld adj: %08d\n",
+ clock_seq, (long)last.tv_sec, (long)last.tv_usec, adjustment);
+ fflush(state_f);
+ if (ftruncate(state_fd, len) < 0) {
+ fprintf(state_f, " \n");
+ fflush(state_f);
+ }
+ rewind(state_f);
+ flock(state_fd, LOCK_UN);
+ }
+
+ *clock_high = clock_reg >> 32;
+ *clock_low = clock_reg;
+ *ret_clock_seq = clock_seq;
+ return ret;
+}
+
+#if defined(HAVE_UUIDD) && defined(HAVE_SYS_UN_H)
+
+/*
+ * Try using the uuidd daemon to generate the UUID
+ *
+ * Returns 0 on success, non-zero on failure.
+ */
+static int get_uuid_via_daemon(int op, uuid_t out, int *num)
+{
+ char op_buf[64];
+ int op_len;
+ int s;
+ ssize_t ret;
+ int32_t reply_len = 0, expected = 16;
+ struct sockaddr_un srv_addr;
+
+ if (sizeof(UUIDD_SOCKET_PATH) > sizeof(srv_addr.sun_path))
+ return -1;
+
+ if ((s = socket(AF_UNIX, SOCK_STREAM, 0)) < 0)
+ return -1;
+
+ srv_addr.sun_family = AF_UNIX;
+ xstrncpy(srv_addr.sun_path, UUIDD_SOCKET_PATH, sizeof(srv_addr.sun_path));
+
+ if (connect(s, (const struct sockaddr *) &srv_addr,
+ sizeof(struct sockaddr_un)) < 0)
+ goto fail;
+
+ op_buf[0] = op;
+ op_len = 1;
+ if (op == UUIDD_OP_BULK_TIME_UUID) {
+ memcpy(op_buf+1, num, sizeof(*num));
+ op_len += sizeof(*num);
+ expected += sizeof(*num);
+ }
+
+ ret = write(s, op_buf, op_len);
+ if (ret < 1)
+ goto fail;
+
+ ret = read_all(s, (char *) &reply_len, sizeof(reply_len));
+ if (ret < 0)
+ goto fail;
+
+ if (reply_len != expected)
+ goto fail;
+
+ ret = read_all(s, op_buf, reply_len);
+
+ if (op == UUIDD_OP_BULK_TIME_UUID)
+ memcpy(op_buf+16, num, sizeof(int));
+
+ memcpy(out, op_buf, 16);
+
+ close(s);
+ return ((ret == expected) ? 0 : -1);
+
+fail:
+ close(s);
+ return -1;
+}
+
+#else /* !defined(HAVE_UUIDD) && defined(HAVE_SYS_UN_H) */
+static int get_uuid_via_daemon(int op __attribute__((__unused__)),
+ uuid_t out __attribute__((__unused__)),
+ int *num __attribute__((__unused__)))
+{
+ return -1;
+}
+#endif
+
+int __uuid_generate_time(uuid_t out, int *num)
+{
+ static unsigned char node_id[6];
+ static int has_init = 0;
+ struct uuid uu;
+ uint32_t clock_mid;
+ int ret;
+
+ if (!has_init) {
+ if (get_node_id(node_id) <= 0) {
+ ul_random_get_bytes(node_id, 6);
+ /*
+ * Set multicast bit, to prevent conflicts
+ * with IEEE 802 addresses obtained from
+ * network cards
+ */
+ node_id[0] |= 0x01;
+ }
+ has_init = 1;
+ }
+ ret = get_clock(&clock_mid, &uu.time_low, &uu.clock_seq, num);
+ uu.clock_seq |= 0x8000;
+ uu.time_mid = (uint16_t) clock_mid;
+ uu.time_hi_and_version = ((clock_mid >> 16) & 0x0FFF) | 0x1000;
+ memcpy(uu.node, node_id, 6);
+ uuid_pack(&uu, out);
+ return ret;
+}
+
+/*
+ * Generate time-based UUID and store it to @out
+ *
+ * Tries to guarantee uniqueness of the generated UUIDs by obtaining them from the uuidd daemon,
+ * or, if uuidd is not usable, by using the global clock state counter (see get_clock()).
+ * If neither of these is possible (e.g. because of insufficient permissions), it generates
+ * the UUID anyway, but returns -1. Otherwise, returns 0.
+ */
+static int uuid_generate_time_generic(uuid_t out) {
+#ifdef HAVE_TLS
+ THREAD_LOCAL int num = 0;
+ THREAD_LOCAL int cache_size = 1;
+ THREAD_LOCAL struct uuid uu;
+ THREAD_LOCAL time_t last_time = 0;
+ time_t now;
+
+ if (num > 0) {
+ now = time(NULL);
+ if (now > last_time+1)
+ num = 0;
+ }
+ if (num <= 0) {
+ /*
+ * num + OP_BULK provides a local cache in each application.
+ * Start with a small cache size to cover short running applications
+ * and increment the cache size over the runntime.
+ */
+ if (cache_size < 1000000)
+ cache_size *= 10;
+ num = cache_size;
+
+ if (get_uuid_via_daemon(UUIDD_OP_BULK_TIME_UUID,
+ out, &num) == 0) {
+ last_time = time(NULL);
+ uuid_unpack(out, &uu);
+ num--;
+ return 0;
+ }
+ num = 0;
+ }
+ if (num > 0) {
+ uu.time_low++;
+ if (uu.time_low == 0) {
+ uu.time_mid++;
+ if (uu.time_mid == 0)
+ uu.time_hi_and_version++;
+ }
+ num--;
+ uuid_pack(&uu, out);
+ return 0;
+ }
+#else
+ if (get_uuid_via_daemon(UUIDD_OP_TIME_UUID, out, 0) == 0)
+ return 0;
+#endif
+
+ return __uuid_generate_time(out, NULL);
+}
+
+/*
+ * Generate time-based UUID and store it to @out.
+ *
+ * Discards return value from uuid_generate_time_generic()
+ */
+void uuid_generate_time(uuid_t out)
+{
+ (void)uuid_generate_time_generic(out);
+}
+
+
+int uuid_generate_time_safe(uuid_t out)
+{
+ return uuid_generate_time_generic(out);
+}
+
+
+int __uuid_generate_random(uuid_t out, int *num)
+{
+ uuid_t buf;
+ struct uuid uu;
+ int i, n, r = 0;
+
+ if (!num || !*num)
+ n = 1;
+ else
+ n = *num;
+
+ for (i = 0; i < n; i++) {
+ if (ul_random_get_bytes(buf, sizeof(buf)))
+ r = -1;
+ uuid_unpack(buf, &uu);
+
+ uu.clock_seq = (uu.clock_seq & 0x3FFF) | 0x8000;
+ uu.time_hi_and_version = (uu.time_hi_and_version & 0x0FFF)
+ | 0x4000;
+ uuid_pack(&uu, out);
+ out += sizeof(uuid_t);
+ }
+
+ return r;
+}
+
+void uuid_generate_random(uuid_t out)
+{
+ int num = 1;
+ /* No real reason to use the daemon for random uuid's -- yet */
+
+ __uuid_generate_random(out, &num);
+}
+
+/*
+ * This is the generic front-end to __uuid_generate_random and
+ * uuid_generate_time. It uses __uuid_generate_random output
+ * only if high-quality randomness is available.
+ */
+void uuid_generate(uuid_t out)
+{
+ int num = 1;
+
+ if (__uuid_generate_random(out, &num))
+ uuid_generate_time(out);
+}
+
+/*
+ * Generate an MD5 hashed (predictable) UUID based on a well-known UUID
+ * providing the namespace and an arbitrary binary string.
+ */
+void uuid_generate_md5(uuid_t out, const uuid_t ns, const char *name, size_t len)
+{
+ UL_MD5_CTX ctx;
+ char hash[UL_MD5LENGTH];
+ uuid_t buf;
+ struct uuid uu;
+
+ ul_MD5Init(&ctx);
+ ul_MD5Update(&ctx, ns, sizeof(uuid_t));
+ ul_MD5Update(&ctx, (const unsigned char *)name, len);
+ ul_MD5Final((unsigned char *)hash, &ctx);
+
+ assert(sizeof(buf) <= sizeof(hash));
+
+ memcpy(buf, hash, sizeof(buf));
+ uuid_unpack(buf, &uu);
+
+ uu.clock_seq = (uu.clock_seq & 0x3FFF) | 0x8000;
+ uu.time_hi_and_version = (uu.time_hi_and_version & 0x0FFF) | 0x3000;
+ uuid_pack(&uu, out);
+}
+
+/*
+ * Generate a SHA1 hashed (predictable) UUID based on a well-known UUID
+ * providing the namespace and an arbitrary binary string.
+ */
+void uuid_generate_sha1(uuid_t out, const uuid_t ns, const char *name, size_t len)
+{
+ UL_SHA1_CTX ctx;
+ char hash[UL_SHA1LENGTH];
+ uuid_t buf;
+ struct uuid uu;
+
+ ul_SHA1Init(&ctx);
+ ul_SHA1Update(&ctx, ns, sizeof(uuid_t));
+ ul_SHA1Update(&ctx, (const unsigned char *)name, len);
+ ul_SHA1Final((unsigned char *)hash, &ctx);
+
+ assert(sizeof(buf) <= sizeof(hash));
+
+ memcpy(buf, hash, sizeof(buf));
+ uuid_unpack(buf, &uu);
+
+ uu.clock_seq = (uu.clock_seq & 0x3FFF) | 0x8000;
+ uu.time_hi_and_version = (uu.time_hi_and_version & 0x0FFF) | 0x5000;
+ uuid_pack(&uu, out);
+}
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