1160814Ssimon/* crypto/rand/rand_nw.c */ 2160814Ssimon/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 3160814Ssimon * All rights reserved. 4160814Ssimon * 5160814Ssimon * This package is an SSL implementation written 6160814Ssimon * by Eric Young (eay@cryptsoft.com). 7160814Ssimon * The implementation was written so as to conform with Netscapes SSL. 8296465Sdelphij * 9160814Ssimon * This library is free for commercial and non-commercial use as long as 10160814Ssimon * the following conditions are aheared to. The following conditions 11160814Ssimon * apply to all code found in this distribution, be it the RC4, RSA, 12160814Ssimon * lhash, DES, etc., code; not just the SSL code. The SSL documentation 13160814Ssimon * included with this distribution is covered by the same copyright terms 14160814Ssimon * except that the holder is Tim Hudson (tjh@cryptsoft.com). 15296465Sdelphij * 16160814Ssimon * Copyright remains Eric Young's, and as such any Copyright notices in 17160814Ssimon * the code are not to be removed. 18160814Ssimon * If this package is used in a product, Eric Young should be given attribution 19160814Ssimon * as the author of the parts of the library used. 20160814Ssimon * This can be in the form of a textual message at program startup or 21160814Ssimon * in documentation (online or textual) provided with the package. 22296465Sdelphij * 23160814Ssimon * Redistribution and use in source and binary forms, with or without 24160814Ssimon * modification, are permitted provided that the following conditions 25160814Ssimon * are met: 26160814Ssimon * 1. Redistributions of source code must retain the copyright 27160814Ssimon * notice, this list of conditions and the following disclaimer. 28160814Ssimon * 2. Redistributions in binary form must reproduce the above copyright 29160814Ssimon * notice, this list of conditions and the following disclaimer in the 30160814Ssimon * documentation and/or other materials provided with the distribution. 31160814Ssimon * 3. All advertising materials mentioning features or use of this software 32160814Ssimon * must display the following acknowledgement: 33160814Ssimon * "This product includes cryptographic software written by 34160814Ssimon * Eric Young (eay@cryptsoft.com)" 35160814Ssimon * The word 'cryptographic' can be left out if the rouines from the library 36160814Ssimon * being used are not cryptographic related :-). 37296465Sdelphij * 4. If you include any Windows specific code (or a derivative thereof) from 38160814Ssimon * the apps directory (application code) you must include an acknowledgement: 39160814Ssimon * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" 40296465Sdelphij * 41160814Ssimon * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 42160814Ssimon * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 43160814Ssimon * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 44160814Ssimon * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 45160814Ssimon * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 46160814Ssimon * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 47160814Ssimon * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 48160814Ssimon * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 49160814Ssimon * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 50160814Ssimon * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 51160814Ssimon * SUCH DAMAGE. 52296465Sdelphij * 53160814Ssimon * The licence and distribution terms for any publically available version or 54160814Ssimon * derivative of this code cannot be changed. i.e. this code cannot simply be 55160814Ssimon * copied and put under another distribution licence 56160814Ssimon * [including the GNU Public Licence.] 57160814Ssimon */ 58160814Ssimon/* ==================================================================== 59160814Ssimon * Copyright (c) 1998-2000 The OpenSSL Project. All rights reserved. 60160814Ssimon * 61160814Ssimon * Redistribution and use in source and binary forms, with or without 62160814Ssimon * modification, are permitted provided that the following conditions 63160814Ssimon * are met: 64160814Ssimon * 65160814Ssimon * 1. Redistributions of source code must retain the above copyright 66296465Sdelphij * notice, this list of conditions and the following disclaimer. 67160814Ssimon * 68160814Ssimon * 2. Redistributions in binary form must reproduce the above copyright 69160814Ssimon * notice, this list of conditions and the following disclaimer in 70160814Ssimon * the documentation and/or other materials provided with the 71160814Ssimon * distribution. 72160814Ssimon * 73160814Ssimon * 3. All advertising materials mentioning features or use of this 74160814Ssimon * software must display the following acknowledgment: 75160814Ssimon * "This product includes software developed by the OpenSSL Project 76160814Ssimon * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" 77160814Ssimon * 78160814Ssimon * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to 79160814Ssimon * endorse or promote products derived from this software without 80160814Ssimon * prior written permission. For written permission, please contact 81160814Ssimon * openssl-core@openssl.org. 82160814Ssimon * 83160814Ssimon * 5. Products derived from this software may not be called "OpenSSL" 84160814Ssimon * nor may "OpenSSL" appear in their names without prior written 85160814Ssimon * permission of the OpenSSL Project. 86160814Ssimon * 87160814Ssimon * 6. Redistributions of any form whatsoever must retain the following 88160814Ssimon * acknowledgment: 89160814Ssimon * "This product includes software developed by the OpenSSL Project 90160814Ssimon * for use in the OpenSSL Toolkit (http://www.openssl.org/)" 91160814Ssimon * 92160814Ssimon * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY 93160814Ssimon * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 94160814Ssimon * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 95160814Ssimon * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR 96160814Ssimon * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 97160814Ssimon * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 98160814Ssimon * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 99160814Ssimon * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 100160814Ssimon * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 101160814Ssimon * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 102160814Ssimon * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 103160814Ssimon * OF THE POSSIBILITY OF SUCH DAMAGE. 104160814Ssimon * ==================================================================== 105160814Ssimon * 106160814Ssimon * This product includes cryptographic software written by Eric Young 107160814Ssimon * (eay@cryptsoft.com). This product includes software written by Tim 108160814Ssimon * Hudson (tjh@cryptsoft.com). 109160814Ssimon * 110160814Ssimon */ 111160814Ssimon 112160814Ssimon#include "cryptlib.h" 113160814Ssimon#include <openssl/rand.h> 114160814Ssimon#include "rand_lcl.h" 115160814Ssimon 116160814Ssimon#if defined (OPENSSL_SYS_NETWARE) 117160814Ssimon 118296465Sdelphij# if defined(NETWARE_LIBC) 119296465Sdelphij# include <nks/thread.h> 120296465Sdelphij# else 121296465Sdelphij# include <nwthread.h> 122296465Sdelphij# endif 123160814Ssimon 124194206Ssimonextern int GetProcessSwitchCount(void); 125296465Sdelphij# if !defined(NETWARE_LIBC) || (CURRENT_NDK_THRESHOLD < 509220000) 126296465Sdelphijextern void *RunningProcess; /* declare here same as found in newer NDKs */ 127194206Ssimonextern unsigned long GetSuperHighResolutionTimer(void); 128296465Sdelphij# endif 129160814Ssimon 130296465Sdelphij /* 131296465Sdelphij * the FAQ indicates we need to provide at least 20 bytes (160 bits) of 132296465Sdelphij * seed 133296465Sdelphij */ 134160814Ssimonint RAND_poll(void) 135160814Ssimon{ 136296465Sdelphij unsigned long l; 137296465Sdelphij unsigned long tsc; 138296465Sdelphij int i; 139160814Ssimon 140296465Sdelphij /* 141296465Sdelphij * There are several options to gather miscellaneous data but for now we 142296465Sdelphij * will loop checking the time stamp counter (rdtsc) and the 143296465Sdelphij * SuperHighResolutionTimer. Each iteration will collect 8 bytes of data 144296465Sdelphij * but it is treated as only 1 byte of entropy. The call to 145296465Sdelphij * ThreadSwitchWithDelay() will introduce additional variability into the 146296465Sdelphij * data returned by rdtsc. Applications can agument the seed material by 147296465Sdelphij * adding additional stuff with RAND_add() and should probably do so. 148296465Sdelphij */ 149296465Sdelphij l = GetProcessSwitchCount(); 150296465Sdelphij RAND_add(&l, sizeof(l), 1); 151160814Ssimon 152296465Sdelphij /* need to cast the void* to unsigned long here */ 153296465Sdelphij l = (unsigned long)RunningProcess; 154296465Sdelphij RAND_add(&l, sizeof(l), 1); 155160814Ssimon 156296465Sdelphij for (i = 2; i < ENTROPY_NEEDED; i++) { 157296465Sdelphij# ifdef __MWERKS__ 158296465Sdelphij asm { 159296465Sdelphij rdtsc mov tsc, eax} 160296465Sdelphij# elif defined(__GNUC__) && __GNUC__>=2 && !defined(OPENSSL_NO_ASM) && !defined(OPENSSL_NO_INLINE_ASM) 161296465Sdelphij asm volatile ("rdtsc":"=a" (tsc)::"edx"); 162296465Sdelphij# endif 163160814Ssimon 164296465Sdelphij RAND_add(&tsc, sizeof(tsc), 1); 165160814Ssimon 166296465Sdelphij l = GetSuperHighResolutionTimer(); 167296465Sdelphij RAND_add(&l, sizeof(l), 0); 168296465Sdelphij 169160814Ssimon# if defined(NETWARE_LIBC) 170296465Sdelphij NXThreadYield(); 171296465Sdelphij# else /* NETWARE_CLIB */ 172296465Sdelphij ThreadSwitchWithDelay(); 173160814Ssimon# endif 174296465Sdelphij } 175160814Ssimon 176296465Sdelphij return 1; 177160814Ssimon} 178160814Ssimon 179296465Sdelphij#endif 180