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Implement vlc_rand_bytes() for OS/2 and split to different files
Signed-off-by: Rémi Denis-Courmont <[email protected]>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,40 @@ | ||
| /***************************************************************************** | ||
| * rand.c : non-predictible random bytes generator | ||
| ***************************************************************************** | ||
| * Copyright (C) 2011 KO Myung-Hun <[email protected]> | ||
| * | ||
| * This program is free software; you can redistribute it and/or modify it | ||
| * under the terms of the GNU Lesser General Public License as published by | ||
| * the Free Software Foundation; either version 2.1 of the License, or | ||
| * (at your option) any later version. | ||
| * | ||
| * This program is distributed in the hope that it will be useful, | ||
| * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
| * GNU Lesser General Public License for more details. | ||
| * | ||
| * You should have received a copy of the GNU Lesser General Public License | ||
| * along with this program; if not, write to the Free Software Foundation, | ||
| * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA. | ||
| *****************************************************************************/ | ||
|
|
||
| #ifdef HAVE_CONFIG_H | ||
| # include "config.h" | ||
| #endif | ||
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| #include <vlc_common.h> | ||
| #include <vlc_rand.h> | ||
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| void vlc_rand_bytes (void *buf, size_t len) | ||
| { | ||
| QWORD qwTime; | ||
| uint8_t *p_buf = (uint8_t *)buf; | ||
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| while (len > 0) | ||
| { | ||
| DosTmrQueryTime( &qwTime ); | ||
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| *p_buf++ = ( uint8_t )( qwTime.ulLo * rand()); | ||
| len--; | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,122 @@ | ||
| /***************************************************************************** | ||
| * rand.c : non-predictible random bytes generator | ||
| ***************************************************************************** | ||
| * Copyright © 2007 Rémi Denis-Courmont | ||
| * $Id$ | ||
| * | ||
| * This program is free software; you can redistribute it and/or modify it | ||
| * under the terms of the GNU Lesser General Public License as published by | ||
| * the Free Software Foundation; either version 2.1 of the License, or | ||
| * (at your option) any later version. | ||
| * | ||
| * This program is distributed in the hope that it will be useful, | ||
| * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
| * GNU Lesser General Public License for more details. | ||
| * | ||
| * You should have received a copy of the GNU Lesser General Public License | ||
| * along with this program; if not, write to the Free Software Foundation, | ||
| * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA. | ||
| *****************************************************************************/ | ||
|
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| #ifdef HAVE_CONFIG_H | ||
| # include "config.h" | ||
| #endif | ||
|
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| #include <vlc_common.h> | ||
| #include <vlc_rand.h> | ||
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| #include <stdint.h> | ||
| #include <string.h> | ||
| #include <stdlib.h> | ||
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| #include <sys/types.h> | ||
| #include <fcntl.h> | ||
| #include <unistd.h> | ||
| #include <pthread.h> | ||
| #include <vlc_fs.h> | ||
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| #include <vlc_md5.h> | ||
|
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| /* | ||
| * Pseudo-random number generator using a HMAC-MD5 in counter mode. | ||
| * Probably not very secure (expert patches welcome) but definitely | ||
| * better than rand() which is defined to be reproducible... | ||
| */ | ||
| #define BLOCK_SIZE 64 | ||
|
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| static uint8_t okey[BLOCK_SIZE], ikey[BLOCK_SIZE]; | ||
|
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| static void vlc_rand_init (void) | ||
| { | ||
| #if defined (__OpenBSD__) || defined (__OpenBSD_kernel__) | ||
| static const char randfile[] = "/dev/random"; | ||
| #else | ||
| static const char randfile[] = "/dev/urandom"; | ||
| #endif | ||
| uint8_t key[BLOCK_SIZE]; | ||
|
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| /* Get non-predictible value as key for HMAC */ | ||
| int fd = vlc_open (randfile, O_RDONLY); | ||
| if (fd == -1) | ||
| return; /* Uho! */ | ||
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| for (size_t i = 0; i < sizeof (key);) | ||
| { | ||
| ssize_t val = read (fd, key + i, sizeof (key) - i); | ||
| if (val > 0) | ||
| i += val; | ||
| } | ||
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| /* Precompute outer and inner keys for HMAC */ | ||
| for (size_t i = 0; i < sizeof (key); i++) | ||
| { | ||
| okey[i] = key[i] ^ 0x5c; | ||
| ikey[i] = key[i] ^ 0x36; | ||
| } | ||
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| close (fd); | ||
| } | ||
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| void vlc_rand_bytes (void *buf, size_t len) | ||
| { | ||
| static pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER; | ||
| static uint64_t counter = 0; | ||
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| uint64_t stamp = NTPtime64 (); | ||
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| while (len > 0) | ||
| { | ||
| uint64_t val; | ||
| struct md5_s mdi, mdo; | ||
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| InitMD5 (&mdi); | ||
| InitMD5 (&mdo); | ||
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| pthread_mutex_lock (&lock); | ||
| if (counter == 0) | ||
| vlc_rand_init (); | ||
| val = counter++; | ||
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| AddMD5 (&mdi, ikey, sizeof (ikey)); | ||
| AddMD5 (&mdo, okey, sizeof (okey)); | ||
| pthread_mutex_unlock (&lock); | ||
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| AddMD5 (&mdi, &stamp, sizeof (stamp)); | ||
| AddMD5 (&mdi, &val, sizeof (val)); | ||
| EndMD5 (&mdi); | ||
| AddMD5 (&mdo, mdi.buf, 16); | ||
| EndMD5 (&mdo); | ||
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| if (len < 16) | ||
| { | ||
| memcpy (buf, mdo.buf, len); | ||
| break; | ||
| } | ||
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| memcpy (buf, mdo.buf, 16); | ||
| len -= 16; | ||
| buf = ((uint8_t *)buf) + 16; | ||
| } | ||
| } |
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