nsprpub/pr/src/md/os2/os2rng.c@6474c204b198 (annotated)
nsprpub/pr/src/md/os2/os2rng.c
Wed, 31 Dec 2014 06:09:35 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Wed, 31 Dec 2014 06:09:35 +0100
- changeset 0
- 6474c204b198
- permissions
- -rw-r--r--
Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.
| michael@0 | 1 | /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ |
| michael@0 | 2 | /* This Source Code Form is subject to the terms of the Mozilla Public |
| michael@0 | 3 | * License, v. 2.0. If a copy of the MPL was not distributed with this |
| michael@0 | 4 | * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ |
| michael@0 | 5 | |
| michael@0 | 6 | |
| michael@0 | 7 | #define INCL_DOS |
| michael@0 | 8 | #define INCL_DOSERRORS |
| michael@0 | 9 | #include <os2.h> |
| michael@0 | 10 | #include <stdlib.h> |
| michael@0 | 11 | #include <time.h> |
| michael@0 | 12 | #include "primpl.h" |
| michael@0 | 13 | |
| michael@0 | 14 | static BOOL clockTickTime(unsigned long *phigh, unsigned long *plow) |
| michael@0 | 15 | { |
| michael@0 | 16 | APIRET rc = NO_ERROR; |
| michael@0 | 17 | QWORD qword = {0,0}; |
| michael@0 | 18 | |
| michael@0 | 19 | rc = DosTmrQueryTime(&qword); |
| michael@0 | 20 | if (rc != NO_ERROR) |
| michael@0 | 21 | return FALSE; |
| michael@0 | 22 | |
| michael@0 | 23 | *phigh = qword.ulHi; |
| michael@0 | 24 | *plow = qword.ulLo; |
| michael@0 | 25 | |
| michael@0 | 26 | return TRUE; |
| michael@0 | 27 | } |
| michael@0 | 28 | |
| michael@0 | 29 | extern PRSize _PR_MD_GetRandomNoise(void *buf, PRSize size ) |
| michael@0 | 30 | { |
| michael@0 | 31 | unsigned long high = 0; |
| michael@0 | 32 | unsigned long low = 0; |
| michael@0 | 33 | clock_t val = 0; |
| michael@0 | 34 | int n = 0; |
| michael@0 | 35 | int nBytes = 0; |
| michael@0 | 36 | time_t sTime; |
| michael@0 | 37 | |
| michael@0 | 38 | if (size <= 0) |
| michael@0 | 39 | return 0; |
| michael@0 | 40 | |
| michael@0 | 41 | clockTickTime(&high, &low); |
| michael@0 | 42 | |
| michael@0 | 43 | /* get the maximally changing bits first */ |
| michael@0 | 44 | nBytes = sizeof(low) > size ? size : sizeof(low); |
| michael@0 | 45 | memcpy(buf, &low, nBytes); |
| michael@0 | 46 | n += nBytes; |
| michael@0 | 47 | size -= nBytes; |
| michael@0 | 48 | |
| michael@0 | 49 | if (size <= 0) |
| michael@0 | 50 | return n; |
| michael@0 | 51 | |
| michael@0 | 52 | nBytes = sizeof(high) > size ? size : sizeof(high); |
| michael@0 | 53 | memcpy(((char *)buf) + n, &high, nBytes); |
| michael@0 | 54 | n += nBytes; |
| michael@0 | 55 | size -= nBytes; |
| michael@0 | 56 | |
| michael@0 | 57 | if (size <= 0) |
| michael@0 | 58 | return n; |
| michael@0 | 59 | |
| michael@0 | 60 | /* get the number of milliseconds that have elapsed since application started */ |
| michael@0 | 61 | val = clock(); |
| michael@0 | 62 | |
| michael@0 | 63 | nBytes = sizeof(val) > size ? size : sizeof(val); |
| michael@0 | 64 | memcpy(((char *)buf) + n, &val, nBytes); |
| michael@0 | 65 | n += nBytes; |
| michael@0 | 66 | size -= nBytes; |
| michael@0 | 67 | |
| michael@0 | 68 | if (size <= 0) |
| michael@0 | 69 | return n; |
| michael@0 | 70 | |
| michael@0 | 71 | /* get the time in seconds since midnight Jan 1, 1970 */ |
| michael@0 | 72 | time(&sTime); |
| michael@0 | 73 | nBytes = sizeof(sTime) > size ? size : sizeof(sTime); |
| michael@0 | 74 | memcpy(((char *)buf) + n, &sTime, nBytes); |
| michael@0 | 75 | n += nBytes; |
| michael@0 | 76 | |
| michael@0 | 77 | return n; |
| michael@0 | 78 | } |
