The Tor Browser / file comparison
comparison: nsprpub/pr/src/md/os2/os2rng.c
nsprpub/pr/src/md/os2/os2rng.c
- branch
- TOR_BUG_3246
- changeset 5
- 4ab42b5ab56c
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| -1:000000000000 | 0:9d5dff14dab2 |
|---|---|
| 1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ | |
| 2 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 3 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 5 | |
| 6 | |
| 7 #define INCL_DOS | |
| 8 #define INCL_DOSERRORS | |
| 9 #include <os2.h> | |
| 10 #include <stdlib.h> | |
| 11 #include <time.h> | |
| 12 #include "primpl.h" | |
| 13 | |
| 14 static BOOL clockTickTime(unsigned long *phigh, unsigned long *plow) | |
| 15 { | |
| 16 APIRET rc = NO_ERROR; | |
| 17 QWORD qword = {0,0}; | |
| 18 | |
| 19 rc = DosTmrQueryTime(&qword); | |
| 20 if (rc != NO_ERROR) | |
| 21 return FALSE; | |
| 22 | |
| 23 *phigh = qword.ulHi; | |
| 24 *plow = qword.ulLo; | |
| 25 | |
| 26 return TRUE; | |
| 27 } | |
| 28 | |
| 29 extern PRSize _PR_MD_GetRandomNoise(void *buf, PRSize size ) | |
| 30 { | |
| 31 unsigned long high = 0; | |
| 32 unsigned long low = 0; | |
| 33 clock_t val = 0; | |
| 34 int n = 0; | |
| 35 int nBytes = 0; | |
| 36 time_t sTime; | |
| 37 | |
| 38 if (size <= 0) | |
| 39 return 0; | |
| 40 | |
| 41 clockTickTime(&high, &low); | |
| 42 | |
| 43 /* get the maximally changing bits first */ | |
| 44 nBytes = sizeof(low) > size ? size : sizeof(low); | |
| 45 memcpy(buf, &low, nBytes); | |
| 46 n += nBytes; | |
| 47 size -= nBytes; | |
| 48 | |
| 49 if (size <= 0) | |
| 50 return n; | |
| 51 | |
| 52 nBytes = sizeof(high) > size ? size : sizeof(high); | |
| 53 memcpy(((char *)buf) + n, &high, nBytes); | |
| 54 n += nBytes; | |
| 55 size -= nBytes; | |
| 56 | |
| 57 if (size <= 0) | |
| 58 return n; | |
| 59 | |
| 60 /* get the number of milliseconds that have elapsed since application started */ | |
| 61 val = clock(); | |
| 62 | |
| 63 nBytes = sizeof(val) > size ? size : sizeof(val); | |
| 64 memcpy(((char *)buf) + n, &val, nBytes); | |
| 65 n += nBytes; | |
| 66 size -= nBytes; | |
| 67 | |
| 68 if (size <= 0) | |
| 69 return n; | |
| 70 | |
| 71 /* get the time in seconds since midnight Jan 1, 1970 */ | |
| 72 time(&sTime); | |
| 73 nBytes = sizeof(sTime) > size ? size : sizeof(sTime); | |
| 74 memcpy(((char *)buf) + n, &sTime, nBytes); | |
| 75 n += nBytes; | |
| 76 | |
| 77 return n; | |
| 78 } |
