Magic-Mirror/gecko-dev
1
0
Fork 0
mirror of https://github.com/mozilla/gecko-dev.git synced 2024-11-04 16:15:25 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity
e3c0a11017
gecko-dev/webtools/mozbot/uuidgen/token.c

357 lines
10 KiB
C
Raw Blame History

/*
** Copyright (C) 1998-1999 Greg Stein. All Rights Reserved.
**
** By using this file, you agree to the terms and conditions set forth in
** the LICENSE.html file which can be found at the top level of the mod_dav
** distribution or at http://www.webdav.org/mod_dav/license-1.html.
**
** Contact information:
** Greg Stein, PO Box 3151, Redmond, WA, 98073
** gstein@lyra.org, http://www.webdav.org/mod_dav/
*/
/*
** DAV opaquelocktoken scheme implementation
**
** Written 5/99 by Keith Wannamaker, wannamak@us.ibm.com
** Adapted from ISO/DCE RPC spec and a former Internet Draft
** by Leach and Salz:
** http://www.ics.uci.edu/pub/ietf/webdav/uuid-guid/draft-leach-uuids-guids-01
**
** Portions of the code are covered by the following license:
**
** Copyright (c) 1990- 1993, 1996 Open Software Foundation, Inc.
** Copyright (c) 1989 by Hewlett-Packard Company, Palo Alto, Ca. &
** Digital Equipment Corporation, Maynard, Mass.
** Copyright (c) 1998 Microsoft.
** To anyone who acknowledges that this file is provided "AS IS"
** without any express or implied warranty: permission to use, copy,
** modify, and distribute this file for any purpose is hereby
** granted without fee, provided that the above copyright notices and
** this notice appears in all source code copies, and that none of
** the names of Open Software Foundation, Inc., Hewlett-Packard
** Company, or Digital Equipment Corporation be used in advertising
** or publicity pertaining to distribution of the software without
** specific, written prior permission. Neither Open Software
** Foundation, Inc., Hewlett-Packard Company, Microsoft, nor Digital Equipment
** Corporation makes any representations about the suitability of
** this software for any purpose.
*/
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include "md5.h"
#include "token.h"
#ifdef WIN32
#include <windows.h>
#else
#include <sys/types.h>
#include <sys/time.h>
#include <sys/sysinfo.h>
#endif
/* set the following to the number of 100ns ticks of the actual resolution of
your system's clock */
#define UUIDS_PER_TICK 1024
/* Set this to what your compiler uses for 64 bit data type */
#ifdef WIN32
#define unsigned64_t unsigned __int64
#define I64(C) C
#else
#define unsigned64_t unsigned long long
#define I64(C) C##LL
#endif
typedef unsigned64_t uuid_time_t;
const uuid_t null_locktoken = {0};
static void format_uuid_v1(uuid_t * uuid, unsigned16 clockseq, uuid_time_t timestamp, uuid_node_t node);
static void get_current_time(uuid_time_t * timestamp);
static unsigned16 true_random(void);
static void get_pseudo_node_identifier(uuid_node_t *node);
static void get_system_time(uuid_time_t *uuid_time);
static void get_random_info(unsigned char seed[16]);
/* dav_create_opaquelocktoken - generates a UUID version 1 token.
* Clock_sequence and node_address set to pseudo-random
* numbers during init.
*
* Should postpend pid to account for non-seralized creation?
*/
int create_token(uuid_state *st, uuid_t *u)
{
uuid_time_t timestamp;
get_current_time(&timestamp);
format_uuid_v1(u, st->cs, timestamp, st->node);
return 1;
}
/*
* dav_create_uuid_state - seed UUID state with pseudorandom data
*/
void create_uuid_state(uuid_state *st)
{
st->cs = true_random();
get_pseudo_node_identifier(&st->node);
}
/*
* dav_format_opaquelocktoken - generates a text representation
* of an opaquelocktoken
*/
void format_token(char *target, const uuid_t *u)
{
sprintf(target, "%08lx-%04x-%04x-%02x%02x-%02x%02x%02x%02x%02x%02x",
u->time_low, u->time_mid, u->time_hi_and_version,
u->clock_seq_hi_and_reserved, u->clock_seq_low,
u->node[0], u->node[1], u->node[2],
u->node[3], u->node[4], u->node[5]);
}
/* convert a pair of hex digits to an integer value [0,255] */
static int dav_parse_hexpair(const char *s)
{
int result;
int temp;
result = s[0] - '0';
if (result > 48)
result = (result - 39) << 4;
else if (result > 16)
result = (result - 7) << 4;
else
result = result << 4;
temp = s[1] - '0';
if (temp > 48)
result |= temp - 39;
else if (temp > 16)
result |= temp - 7;
else
result |= temp;
return result;
}
/* dav_parse_locktoken: Parses string produced from
* dav_format_opaquelocktoken back into a uuid_t
* structure. On failure, return DAV_IF_ERROR_PARSE,
* else DAV_IF_ERROR_NONE.
*/
int parse_token(const char *char_token, uuid_t *bin_token)
{
int i;
for (i = 0; i < 36; ++i) {
char c = char_token[i];
if (!isxdigit(c) &&
!(c == '-' && (i == 8 || i == 13 || i == 18 || i == 23)))
return -1;
}
if (char_token[36] != '\0')
return -1;
bin_token->time_low =
(dav_parse_hexpair(&char_token[0]) << 24) |
(dav_parse_hexpair(&char_token[2]) << 16) |
(dav_parse_hexpair(&char_token[4]) << 8) |
dav_parse_hexpair(&char_token[6]);
bin_token->time_mid =
(dav_parse_hexpair(&char_token[9]) << 8) |
dav_parse_hexpair(&char_token[11]);
bin_token->time_hi_and_version =
(dav_parse_hexpair(&char_token[14]) << 8) |
dav_parse_hexpair(&char_token[16]);
bin_token->clock_seq_hi_and_reserved = dav_parse_hexpair(&char_token[19]);
bin_token->clock_seq_low = dav_parse_hexpair(&char_token[21]);
for (i = 6; i--;)
bin_token->node[i] = dav_parse_hexpair(&char_token[i*2+24]);
return -1;
}
/* dav_compare_opaquelocktoken:
* < 0 : a < b
* == 0 : a = b
* > 0 : a > b
*/
int compare_token(const uuid_t a, const uuid_t b)
{
return memcmp(&a, &b, sizeof(uuid_t));
}
/* format_uuid_v1 -- make a UUID from the timestamp, clockseq, and node ID */
static void format_uuid_v1(uuid_t * uuid, unsigned16 clock_seq,
uuid_time_t timestamp, uuid_node_t node)
{
/* Construct a version 1 uuid with the information we've gathered
* plus a few constants. */
uuid->time_low = (unsigned long)(timestamp & 0xFFFFFFFF);
uuid->time_mid = (unsigned short)((timestamp >> 32) & 0xFFFF);
uuid->time_hi_and_version = (unsigned short)((timestamp >> 48) & 0x0FFF);
uuid->time_hi_and_version |= (1 << 12);
uuid->clock_seq_low = clock_seq & 0xFF;
uuid->clock_seq_hi_and_reserved = (clock_seq & 0x3F00) >> 8;
uuid->clock_seq_hi_and_reserved |= 0x80;
memcpy(&uuid->node, &node, sizeof uuid->node);
}
/* get-current_time -- get time as 60 bit 100ns ticks since whenever.
Compensate for the fact that real clock resolution is less than 100ns. */
static void get_current_time(uuid_time_t * timestamp)
{
uuid_time_t time_now;
static uuid_time_t time_last;
static unsigned16 uuids_this_tick;
static int inited = 0;
if (!inited) {
get_system_time(&time_now);
uuids_this_tick = UUIDS_PER_TICK;
inited = 1;
};
while (1) {
get_system_time(&time_now);
/* if clock reading changed since last UUID generated... */
if (time_last != time_now) {
/* reset count of uuids gen'd with this clock reading */
uuids_this_tick = 0;
break;
};
if (uuids_this_tick < UUIDS_PER_TICK) {
uuids_this_tick++;
break;
}; /* going too fast for our clock; spin */
}; /* add the count of uuids to low order bits of the clock reading */
*timestamp = time_now + uuids_this_tick;
}
/* true_random -- generate a crypto-quality random number.
This sample doesn't do that. */
static unsigned16 true_random(void)
{
uuid_time_t time_now;
get_system_time(&time_now);
time_now = time_now/UUIDS_PER_TICK;
srand((unsigned int)(((time_now >> 32) ^ time_now)&0xffffffff));
return rand();
}
/* This sample implementation generates a random node ID *
* in lieu of a system dependent call to get IEEE node ID. */
static void get_pseudo_node_identifier(uuid_node_t *node)
{
unsigned char seed[16];
get_random_info(seed);
seed[0] |= 0x80;
memcpy(node, seed, sizeof(*node));
}
/* system dependent call to get the current system time.
Returned as 100ns ticks since Oct 15, 1582, but resolution may be
less than 100ns. */
#ifdef WIN32
static void get_system_time(uuid_time_t *uuid_time)
{
ULARGE_INTEGER time;
GetSystemTimeAsFileTime((FILETIME *)&time);
/* NT keeps time in FILETIME format which is 100ns ticks since
Jan 1, 1601. UUIDs use time in 100ns ticks since Oct 15, 1582.
The difference is 17 Days in Oct + 30 (Nov) + 31 (Dec)
+ 18 years and 5 leap days. */
time.QuadPart +=
(unsigned __int64) (1000*1000*10) // seconds
* (unsigned __int64) (60 * 60 * 24) // days
* (unsigned __int64) (17+30+31+365*18+5); // # of days
*uuid_time = time.QuadPart;
}
static void get_random_info(unsigned char seed[16])
{
MD5_CTX c;
struct {
MEMORYSTATUS m;
SYSTEM_INFO s;
FILETIME t;
LARGE_INTEGER pc;
DWORD tc;
DWORD l;
char hostname[MAX_COMPUTERNAME_LENGTH + 1];
} r;
MD5Init(&c); /* memory usage stats */
GlobalMemoryStatus(&r.m); /* random system stats */
GetSystemInfo(&r.s); /* 100ns resolution (nominally) time of day */
GetSystemTimeAsFileTime(&r.t); /* high resolution performance counter */
QueryPerformanceCounter(&r.pc); /* milliseconds since last boot */
r.tc = GetTickCount();
r.l = MAX_COMPUTERNAME_LENGTH + 1;
GetComputerName(r.hostname, &r.l );
MD5Update(&c, (const unsigned char *) &r, sizeof(r));
MD5Final(seed, &c);
}
#else /* WIN32 */
static void get_system_time(uuid_time_t *uuid_time)
{
struct timeval tp;
gettimeofday(&tp, (struct timezone *)0);
/* Offset between UUID formatted times and Unix formatted times.
UUID UTC base time is October 15, 1582.
Unix base time is January 1, 1970. */
*uuid_time = (tp.tv_sec * 10000000) + (tp.tv_usec * 10) +
I64(0x01B21DD213814000);
}
static void get_random_info(unsigned char seed[16])
{
MD5_CTX c;
/* Leech & Salz use Linux-specific struct sysinfo;
* replace with pid/tid for portability (in the spirit of mod_unique_id) */
struct {
/* Add thread id here, if applicable, when we get to pthread or apr */
pid_t pid;
struct timeval t;
char hostname[257];
} r;
MD5Init(&c);
r.pid = getpid();
gettimeofday(&r.t, (struct timezone *)0);
gethostname(r.hostname, 256);
MD5Update(&c, (const unsigned char *)&r, sizeof(r));
MD5Final(seed, &c);
}
#endif /* WIN32 */
Reference in New Issue View Git Blame Copy Permalink