DXR is a code search and navigation tool aimed at making sense of large projects. It supports full-text and regex searches as well as structural queries.

Untracked file

Line Code
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548
/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is the Netscape security libraries.
 *
 * The Initial Developer of the Original Code is
 * Netscape Communications Corporation.
 * Portions created by the Initial Developer are Copyright (C) 1994-2000
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either the GNU General Public License Version 2 or later (the "GPL"), or
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the MPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */

#include "secrng.h"
#ifdef XP_WIN
#include <windows.h>

#if defined(_WIN32_WCE)
#include <stdlib.h>	/* Win CE puts lots of stuff here. */
#include "prprf.h"	/* for PR_snprintf */
#else
#include <time.h>
#include <io.h>
#include <sys/types.h>
#include <sys/stat.h>
#endif
#include <stdio.h>

#ifndef _WIN32
#define VTD_Device_ID   5
#define OP_OVERRIDE     _asm _emit 0x66
#include <dos.h>
#endif

#include "prio.h"

static PRInt32  filesToRead;
static DWORD    totalFileBytes;
static DWORD    maxFileBytes	= 250000;	/* 250 thousand */
static DWORD    dwNumFiles, dwReadEvery;

static BOOL
CurrentClockTickTime(LPDWORD lpdwHigh, LPDWORD lpdwLow)
{
#ifdef _WIN32
    LARGE_INTEGER   liCount;

    if (!QueryPerformanceCounter(&liCount))
        return FALSE;

    *lpdwHigh = liCount.u.HighPart;
    *lpdwLow = liCount.u.LowPart;
    return TRUE;

#else   /* is WIN16 */
    BOOL    bRetVal;
    FARPROC lpAPI;
    WORD    w1, w2, w3, w4;

    // Get direct access to the VTD and query the current clock tick time
    _asm {
        xor   di, di
        mov   es, di
        mov   ax, 1684h
        mov   bx, VTD_Device_ID
        int   2fh
        mov   ax, es
        or    ax, di
        jz    EnumerateFailed

        ; VTD API is available. First store the API address (the address actually
        ; contains an instruction that causes a fault, the fault handler then
        ; makes the ring transition and calls the API in the VxD)
        mov   word ptr lpAPI, di
        mov   word ptr lpAPI+2, es
        mov   ax, 100h      ; API function to VTD_Get_Real_Time
;       call  dword ptr [lpAPI]
        call  [lpAPI]

        ; Result is in EDX:EAX which we will get 16-bits at a time
        mov   w2, dx
        OP_OVERRIDE
        shr   dx,10h        ; really "shr edx, 16"
        mov   w1, dx

        mov   w4, ax
        OP_OVERRIDE
        shr   ax,10h        ; really "shr eax, 16"
        mov   w3, ax

        mov   bRetVal, 1    ; return TRUE
        jmp   EnumerateExit

      EnumerateFailed:
        mov   bRetVal, 0    ; return FALSE

      EnumerateExit:
    }

    *lpdwHigh = MAKELONG(w2, w1);
    *lpdwLow = MAKELONG(w4, w3);

    return bRetVal;
#endif  /* is WIN16 */
}

size_t RNG_GetNoise(void *buf, size_t maxbuf)
{
    DWORD   dwHigh, dwLow, dwVal;
    int     n = 0;
    int     nBytes;

    if (maxbuf <= 0)
        return 0;

    CurrentClockTickTime(&dwHigh, &dwLow);

    // get the maximally changing bits first
    nBytes = sizeof(dwLow) > maxbuf ? maxbuf : sizeof(dwLow);
    memcpy((char *)buf, &dwLow, nBytes);
    n += nBytes;
    maxbuf -= nBytes;

    if (maxbuf <= 0)
        return n;

    nBytes = sizeof(dwHigh) > maxbuf ? maxbuf : sizeof(dwHigh);
    memcpy(((char *)buf) + n, &dwHigh, nBytes);
    n += nBytes;
    maxbuf -= nBytes;

    if (maxbuf <= 0)
        return n;

    // get the number of milliseconds that have elapsed since Windows started
    dwVal = GetTickCount();

    nBytes = sizeof(dwVal) > maxbuf ? maxbuf : sizeof(dwVal);
    memcpy(((char *)buf) + n, &dwVal, nBytes);
    n += nBytes;
    maxbuf -= nBytes;

    if (maxbuf <= 0)
        return n;

#if defined(_WIN32_WCE)
    {
    // get the number of milliseconds elapsed since Windows CE was started. 
    DWORD  tickCount = GetTickCount();
    nBytes = (sizeof tickCount) > maxbuf ? maxbuf : (sizeof tickCount);
    memcpy(((char *)buf) + n, &tickCount, nBytes);
    n += nBytes;
    }
#else
    {
    time_t  sTime;
    // get the time in seconds since midnight Jan 1, 1970
    time(&sTime);
    nBytes = sizeof(sTime) > maxbuf ? maxbuf : sizeof(sTime);
    memcpy(((char *)buf) + n, &sTime, nBytes);
    n += nBytes;
    }
#endif

    return n;
}

#if defined(_WIN32_WCE)
static BOOL
EnumSystemFilesWithNSPR(const char * dirName, 
			BOOL recursive,
                        PRInt32 (*func)(const char *))
{
    PRDir *      pDir;
    PRDirEntry * pEntry;
    BOOL         rv 		= FALSE;

    pDir = PR_OpenDir(dirName);
    if (!pDir)
    	return rv;
    while ((pEntry = PR_ReadDir(pDir, PR_SKIP_BOTH|PR_SKIP_HIDDEN)) != NULL) {
	PRStatus    status;
	PRInt32     count;
	PRInt32     stop;
	PRFileInfo  fileInfo;
	char        szFileName[_MAX_PATH];

        count = (PRInt32)PR_snprintf(szFileName, sizeof szFileName, "%s\\%s", 
	                             dirName, PR_DirName(pEntry));
	if (count < 1)
	    continue;
	status = PR_GetFileInfo(szFileName, &fileInfo);
	if (status != PR_SUCCESS)
	    continue;
	if (fileInfo.type == PR_FILE_FILE) {
	    stop = (*func)(szFileName);
	    rv = TRUE;
	    if (stop)
	        break;
	    continue;
    	}
	if (recursive && fileInfo.type == PR_FILE_DIRECTORY) {
	    rv |= EnumSystemFilesWithNSPR(szFileName, recursive, func);
	}
    }
    PR_CloseDir(pDir);
    return rv;
}
#endif

static BOOL
EnumSystemFiles(PRInt32 (*func)(const char *))
{
#if defined(_WIN32_WCE)
    BOOL rv = FALSE;
    rv |= EnumSystemFilesWithNSPR("\\Windows\\Temporary Internet Files", TRUE, func);
    rv |= EnumSystemFilesWithNSPR("\\Temp",    FALSE, func);
    rv |= EnumSystemFilesWithNSPR("\\Windows", FALSE, func);
    return rv;
#else
    int                 iStatus;
    char                szSysDir[_MAX_PATH];
    char                szFileName[_MAX_PATH];
#ifdef _WIN32
    struct _finddata_t  fdData;
    long                lFindHandle;
#else
    struct _find_t  fdData;
#endif

    if (!GetSystemDirectory(szSysDir, sizeof(szSysDir)))
        return FALSE;

    // tack *.* on the end so we actually look for files. this will
    // not overflow
    strcpy(szFileName, szSysDir);
    strcat(szFileName, "\\*.*");

#ifdef _WIN32
    lFindHandle = _findfirst(szFileName, &fdData);
    if (lFindHandle == -1)
        return FALSE;
#else
    if (_dos_findfirst(szFileName, _A_NORMAL | _A_RDONLY | _A_ARCH | _A_SUBDIR, &fdData) != 0)
        return FALSE;
#endif

    do {
        // pass the full pathname to the callback
        sprintf(szFileName, "%s\\%s", szSysDir, fdData.name);
        (*func)(szFileName);

#ifdef _WIN32
        iStatus = _findnext(lFindHandle, &fdData);
#else
        iStatus = _dos_findnext(&fdData);
#endif
    } while (iStatus == 0);

#ifdef _WIN32
    _findclose(lFindHandle);
#endif

    return TRUE;
#endif
}

static PRInt32
CountFiles(const char *file)
{
    dwNumFiles++;
    return 0;
}

static PRInt32
ReadFiles(const char *file)
{
    if ((dwNumFiles % dwReadEvery) == 0) {
	++filesToRead;
    }
    if (filesToRead) {
	DWORD    prevFileBytes = totalFileBytes;
        RNG_FileForRNG(file);
	if (prevFileBytes < totalFileBytes) {
	    --filesToRead;
	}
    }
    dwNumFiles++;
    return (totalFileBytes >= maxFileBytes);
}

static void
ReadSystemFiles()
{
    // first count the number of files
    dwNumFiles = 0;
    if (!EnumSystemFiles(CountFiles))
        return;

    RNG_RandomUpdate(&dwNumFiles, sizeof(dwNumFiles));

    // now read 10 files
    filesToRead = 10;
    if (dwNumFiles == 0)
        return;

    dwReadEvery = dwNumFiles / 10;
    if (dwReadEvery == 0)
        dwReadEvery = 1;  // less than 10 files

    dwNumFiles = 0;
    EnumSystemFiles(ReadFiles);
}

void RNG_SystemInfoForRNG(void)
{
    DWORD           dwVal;
    char            buffer[256];
    int             nBytes;
#ifdef _WIN32
    MEMORYSTATUS    sMem;
    HANDLE          hVal;
#if !defined(_WIN32_WCE)
    DWORD           dwSerialNum;
    DWORD           dwComponentLen;
    DWORD           dwSysFlags;
    char            volName[128];
    DWORD           dwSectors, dwBytes, dwFreeClusters, dwNumClusters;
#endif
#else
    int             iVal;
    HTASK           hTask;
    WORD            wDS, wCS;
    LPSTR           lpszEnv;
#endif

    nBytes = RNG_GetNoise(buffer, 20);  // get up to 20 bytes
    RNG_RandomUpdate(buffer, nBytes);

#ifdef _WIN32
    sMem.dwLength = sizeof(sMem);
    GlobalMemoryStatus(&sMem);                // assorted memory stats
    RNG_RandomUpdate(&sMem, sizeof(sMem));
#if !defined(_WIN32_WCE)
    dwVal = GetLogicalDrives();
    RNG_RandomUpdate(&dwVal, sizeof(dwVal));  // bitfields in bits 0-25
#endif
#else
    dwVal = GetFreeSpace(0);
    RNG_RandomUpdate(&dwVal, sizeof(dwVal));

    _asm    mov wDS, ds;
    _asm    mov wCS, cs;
    RNG_RandomUpdate(&wDS, sizeof(wDS));
    RNG_RandomUpdate(&wCS, sizeof(wCS));
#endif

#ifdef _WIN32
#if !defined(_WIN32_WCE)
    dwVal = sizeof(buffer);
    if (GetComputerName(buffer, &dwVal))
        RNG_RandomUpdate(buffer, dwVal);
#endif
/* XXX This is code that got yanked because of NSPR20.  We should put it
 * back someday.
 */
#ifdef notdef
    {
    POINT ptVal;
    GetCursorPos(&ptVal);
    RNG_RandomUpdate(&ptVal, sizeof(ptVal));
    }

    dwVal = GetQueueStatus(QS_ALLINPUT);      // high and low significant
    RNG_RandomUpdate(&dwVal, sizeof(dwVal));

    {
    HWND hWnd;
    hWnd = GetClipboardOwner();               // 2 or 4 bytes
    RNG_RandomUpdate((void *)&hWnd, sizeof(hWnd));
    }

    {
    UUID sUuid;
    UuidCreate(&sUuid);                       // this will fail on machines with no ethernet
    RNG_RandomUpdate(&sUuid, sizeof(sUuid));  // boards. shove the bits in regardless
    }
#endif

    hVal = GetCurrentProcess();               // 4 byte handle of current task
    RNG_RandomUpdate(&hVal, sizeof(hVal));

    dwVal = GetCurrentProcessId();            // process ID (4 bytes)
    RNG_RandomUpdate(&dwVal, sizeof(dwVal));

#if !defined(_WIN32_WCE)
    volName[0] = '\0';
    buffer[0] = '\0';
    GetVolumeInformation(NULL,
                         volName,
                         sizeof(volName),
                         &dwSerialNum,
                         &dwComponentLen,
                         &dwSysFlags,
                         buffer,
                         sizeof(buffer));

    RNG_RandomUpdate(volName,         strlen(volName));
    RNG_RandomUpdate(&dwSerialNum,    sizeof(dwSerialNum));
    RNG_RandomUpdate(&dwComponentLen, sizeof(dwComponentLen));
    RNG_RandomUpdate(&dwSysFlags,     sizeof(dwSysFlags));
    RNG_RandomUpdate(buffer,          strlen(buffer));

    if (GetDiskFreeSpace(NULL, &dwSectors, &dwBytes, &dwFreeClusters, &dwNumClusters)) {
        RNG_RandomUpdate(&dwSectors,      sizeof(dwSectors));
        RNG_RandomUpdate(&dwBytes,        sizeof(dwBytes));
        RNG_RandomUpdate(&dwFreeClusters, sizeof(dwFreeClusters));
        RNG_RandomUpdate(&dwNumClusters,  sizeof(dwNumClusters));
    }
#endif
#else   /* is WIN16 */
    hTask = GetCurrentTask();
    RNG_RandomUpdate((void *)&hTask, sizeof(hTask));

    iVal = GetNumTasks();
    RNG_RandomUpdate(&iVal, sizeof(iVal));      // number of running tasks

    lpszEnv = GetDOSEnvironment();
    while (*lpszEnv != '\0') {
        RNG_RandomUpdate(lpszEnv, strlen(lpszEnv));

        lpszEnv += strlen(lpszEnv) + 1;
    }
#endif  /* is WIN16 */

    // now let's do some files
    ReadSystemFiles();

    nBytes = RNG_GetNoise(buffer, 20);  // get up to 20 bytes
    RNG_RandomUpdate(buffer, nBytes);
}

#if defined(_WIN32_WCE)
void RNG_FileForRNG(const char *filename)
{
    PRFileDesc *    file;
    int             nBytes;
    PRFileInfo      infoBuf;
    unsigned char   buffer[1024];

    /* windows doesn't initialize all the bytes in the stat buf,
     * so initialize them all here to avoid UMRs.
     */
    memset(&infoBuf, 0, sizeof infoBuf);

    if (PR_GetFileInfo(filename, &infoBuf) < 0)
        return;

    RNG_RandomUpdate((unsigned char*)&infoBuf, sizeof(infoBuf));

    file = PR_Open(filename, PR_RDONLY, 0);
    if (file != NULL) {
        for (;;) {
            PRInt32 bytes = PR_Read(file, buffer, sizeof buffer);

            if (bytes <= 0)
                break;

            RNG_RandomUpdate(buffer, bytes);
            totalFileBytes += bytes;
            if (totalFileBytes > maxFileBytes)
                break;
        }

        PR_Close(file);
    }

    nBytes = RNG_GetNoise(buffer, 20);  // get up to 20 bytes
    RNG_RandomUpdate(buffer, nBytes);
}

#else /* not WinCE */

void RNG_FileForRNG(const char *filename)
{
    FILE*           file;
    int             nBytes;
    struct stat     stat_buf;
    unsigned char   buffer[1024];

   /* static DWORD    totalFileBytes = 0; */

    /* windows doesn't initialize all the bytes in the stat buf,
     * so initialize them all here to avoid UMRs.
     */
    memset(&stat_buf, 0, sizeof stat_buf);

    if (stat((char *)filename, &stat_buf) < 0)
        return;

    RNG_RandomUpdate((unsigned char*)&stat_buf, sizeof(stat_buf));

    file = fopen((char *)filename, "r");
    if (file != NULL) {
        for (;;) {
            size_t  bytes = fread(buffer, 1, sizeof(buffer), file);

            if (bytes == 0)
                break;

            RNG_RandomUpdate(buffer, bytes);
            totalFileBytes += bytes;
            if (totalFileBytes > maxFileBytes)
                break;
        }

        fclose(file);
    }

    nBytes = RNG_GetNoise(buffer, 20);  // get up to 20 bytes
    RNG_RandomUpdate(buffer, nBytes);
}

#endif  /* not WinCE */
#endif  /* is XP_WIN */