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Diffstat (limited to 'lib/libcrypto/rand/md_rand_munged.c')
| -rw-r--r-- | lib/libcrypto/rand/md_rand_munged.c | 515 |
1 files changed, 0 insertions, 515 deletions
diff --git a/lib/libcrypto/rand/md_rand_munged.c b/lib/libcrypto/rand/md_rand_munged.c deleted file mode 100644 index 1611bf335b0..00000000000 --- a/lib/libcrypto/rand/md_rand_munged.c +++ /dev/null @@ -1,515 +0,0 @@ -/* crypto/rand/md_rand.c */ -/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) - * All rights reserved. - * - * This package is an SSL implementation written - * by Eric Young (eay@cryptsoft.com). - * The implementation was written so as to conform with Netscapes SSL. - * - * This library is free for commercial and non-commercial use as long as - * the following conditions are aheared to. The following conditions - * apply to all code found in this distribution, be it the RC4, RSA, - * lhash, DES, etc., code; not just the SSL code. The SSL documentation - * included with this distribution is covered by the same copyright terms - * except that the holder is Tim Hudson (tjh@cryptsoft.com). - * - * Copyright remains Eric Young's, and as such any Copyright notices in - * the code are not to be removed. - * If this package is used in a product, Eric Young should be given attribution - * as the author of the parts of the library used. - * This can be in the form of a textual message at program startup or - * in documentation (online or textual) provided with the package. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. All advertising materials mentioning features or use of this software - * must display the following acknowledgement: - * "This product includes cryptographic software written by - * Eric Young (eay@cryptsoft.com)" - * The word 'cryptographic' can be left out if the rouines from the library - * being used are not cryptographic related :-). - * 4. If you include any Windows specific code (or a derivative thereof) from - * the apps directory (application code) you must include an acknowledgement: - * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" - * - * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - * - * The licence and distribution terms for any publically available version or - * derivative of this code cannot be changed. i.e. this code cannot simply be - * copied and put under another distribution licence - * [including the GNU Public Licence.] - */ - -#include <stdio.h> -#include <sys/types.h> -#include <fcntl.h> -#include <time.h> -#include <string.h> - -#include "openssl/e_os.h" - -#include <openssl/crypto.h> - -#if !defined(USE_MD5_RAND) && !defined(USE_SHA1_RAND) && !defined(USE_MDC2_RAND) && !defined(USE_MD2_RAND) -#if !defined(NO_SHA) && !defined(NO_SHA1) -#define USE_SHA1_RAND -#elif !defined(NO_MD5) -#define USE_MD5_RAND -#elif !defined(NO_MDC2) && !defined(NO_DES) -#define USE_MDC2_RAND -#elif !defined(NO_MD2) -#define USE_MD2_RAND -#else -#error No message digest algorithm available -#endif -#endif - -/* Changed how the state buffer used. I now attempt to 'wrap' such - * that I don't run over the same locations the next time go through - * the 1023 bytes - many thanks to - * Robert J. LeBlanc <rjl@renaissoft.com> for his comments - */ - -#if defined(USE_MD5_RAND) -#include <openssl/md5.h> -#define MD_DIGEST_LENGTH MD5_DIGEST_LENGTH -#define MD_CTX MD5_CTX -#define MD_Init(a) MD5_Init(a) -#define MD_Update(a,b,c) MD5_Update(a,b,c) -#define MD_Final(a,b) MD5_Final(a,b) -#define MD(a,b,c) MD5(a,b,c) -#elif defined(USE_SHA1_RAND) -#include <openssl/sha.h> -#define MD_DIGEST_LENGTH SHA_DIGEST_LENGTH -#define MD_CTX SHA_CTX -#define MD_Init(a) SHA1_Init(a) -#define MD_Update(a,b,c) SHA1_Update(a,b,c) -#define MD_Final(a,b) SHA1_Final(a,b) -#define MD(a,b,c) SHA1(a,b,c) -#elif defined(USE_MDC2_RAND) -#include <openssl/mdc2.h> -#define MD_DIGEST_LENGTH MDC2_DIGEST_LENGTH -#define MD_CTX MDC2_CTX -#define MD_Init(a) MDC2_Init(a) -#define MD_Update(a,b,c) MDC2_Update(a,b,c) -#define MD_Final(a,b) MDC2_Final(a,b) -#define MD(a,b,c) MDC2(a,b,c) -#elif defined(USE_MD2_RAND) -#include <openssl/md2.h> -#define MD_DIGEST_LENGTH MD2_DIGEST_LENGTH -#define MD_CTX MD2_CTX -#define MD_Init(a) MD2_Init(a) -#define MD_Update(a,b,c) MD2_Update(a,b,c) -#define MD_Final(a,b) MD2_Final(a,b) -#define MD(a,b,c) MD2(a,b,c) -#endif - -#include <openssl/rand.h> - -/* #define NORAND 1 */ -/* #define PREDICT 1 */ - -#define STATE_SIZE 1023 -static int state_num=0,state_index=0; -static unsigned char state[STATE_SIZE+MD_DIGEST_LENGTH]; -static unsigned char md[MD_DIGEST_LENGTH]; -static long md_count[2]={0,0}; -static double entropy=0; -static int initialized=0; - -const char *RAND_version="RAND" OPENSSL_VERSION_PTEXT; - -static void ssleay_rand_cleanup(void); -static void ssleay_rand_seed(const void *buf, int num); -static void ssleay_rand_add(const void *buf, int num, double add_entropy); -static int ssleay_rand_bytes(unsigned char *buf, int num); -static int ssleay_rand_pseudo_bytes(unsigned char *buf, int num); - -RAND_METHOD rand_ssleay_meth={ - ssleay_rand_seed, - ssleay_rand_bytes, - ssleay_rand_cleanup, - ssleay_rand_add, - ssleay_rand_pseudo_bytes, - }; - -RAND_METHOD *RAND_SSLeay(void) - { - return(&rand_ssleay_meth); - } - -static void ssleay_rand_cleanup(void) - { - memset(state,0,sizeof(state)); - state_num=0; - state_index=0; - memset(md,0,MD_DIGEST_LENGTH); - md_count[0]=0; - md_count[1]=0; - entropy=0; - } - -static void ssleay_rand_add(const void *buf, int num, double add) - { - int i,j,k,st_idx; - long md_c[2]; - unsigned char local_md[MD_DIGEST_LENGTH]; - MD_CTX m; - -#ifdef NORAND - return; -#endif - - /* - * (Based on the rand(3) manpage) - * - * The input is chopped up into units of 20 bytes (or less for - * the last block). Each of these blocks is run through the hash - * function as follows: The data passed to the hash function - * is the current 'md', the same number of bytes from the 'state' - * (the location determined by in incremented looping index) as - * the current 'block', the new key data 'block', and 'count' - * (which is incremented after each use). - * The result of this is kept in 'md' and also xored into the - * 'state' at the same locations that were used as input into the - * hash function. - */ - - CRYPTO_w_lock(CRYPTO_LOCK_RAND); - st_idx=state_index; - - /* use our own copies of the counters so that even - * if a concurrent thread seeds with exactly the - * same data and uses the same subarray there's _some_ - * difference */ - md_c[0] = md_count[0]; - md_c[1] = md_count[1]; - - memcpy(local_md, md, sizeof md); - - /* state_index <= state_num <= STATE_SIZE */ - state_index += num; - if (state_index >= STATE_SIZE) - { - state_index%=STATE_SIZE; - state_num=STATE_SIZE; - } - else if (state_num < STATE_SIZE) - { - if (state_index > state_num) - state_num=state_index; - } - /* state_index <= state_num <= STATE_SIZE */ - - /* state[st_idx], ..., state[(st_idx + num - 1) % STATE_SIZE] - * are what we will use now, but other threads may use them - * as well */ - - md_count[1] += (num / MD_DIGEST_LENGTH) + (num % MD_DIGEST_LENGTH > 0); - - CRYPTO_w_unlock(CRYPTO_LOCK_RAND); - - for (i=0; i<num; i+=MD_DIGEST_LENGTH) - { - j=(num-i); - j=(j > MD_DIGEST_LENGTH)?MD_DIGEST_LENGTH:j; - - MD_Init(&m); - MD_Update(&m,local_md,MD_DIGEST_LENGTH); - k=(st_idx+j)-STATE_SIZE; - if (k > 0) - { - MD_Update(&m,&(state[st_idx]),j-k); - MD_Update(&m,&(state[0]),k); - } - else - MD_Update(&m,&(state[st_idx]),j); - - MD_Update(&m,buf,j); - MD_Update(&m,(unsigned char *)&(md_count[0]),sizeof(md_count)); - MD_Final(md,&m); - md_count[1]++; - - buf=(const char *)buf + j; - - for (k=0; k<j; k++) - { - state[st_idx++]^=md[k]; - if (st_idx >= STATE_SIZE) - { - st_idx=0; - st_num=STATE_SIZE; - } - } - } - memset((char *)&m,0,sizeof(m)); - } - -static void ssleay_rand_bytes(unsigned char *buf, int num) - { - int i,j,k,st_num,st_idx; - MD_CTX m; - static int init=1; - unsigned long l; -#ifdef DEVRANDOM - int fd; -#endif - -#ifdef PREDICT - { - static unsigned char val=0; - - for (i=0; i<num; i++) - buf[i]=val++; - return; - } -#endif - - CRYPTO_w_lock(CRYPTO_LOCK_RAND); - - if (init) - { - CRYPTO_w_unlock(CRYPTO_LOCK_RAND); - /* put in some default random data, we need more than - * just this */ - RAND_seed(&m,sizeof(m)); -#ifndef MSDOS - l=getpid(); - RAND_seed(&l,sizeof(l)); - l=getuid(); - RAND_seed(&l,sizeof(l)); -#endif - l=time(NULL); - RAND_seed(&l,sizeof(l)); - -/* #ifdef DEVRANDOM */ - /* - * Use a random entropy pool device. - * Linux 1.3.x, OpenBSD, and FreeBSD have - * this. Use /dev/urandom if you can - * as /dev/random will block if it runs out - * of random entries. - */ - if ((fd = open(DEVRANDOM, O_RDONLY)) != NULL) - { - unsigned char tmpbuf[32]; - - read(fd, tmpbuf, sizeof(tmpbuf)); - /* we don't care how many bytes we read, - * we will just copy the 'stack' if there is - * nothing else :-) */ - /* the above comment is EVIL. Security software - * RELIES ON THESE PRIMITIVES HAVING MORE SECURE - * BEHAVIOUR! Secure entropy is required in - * many cases! */ - RAND_seed(tmpbuf,32); - memset(tmpbuf,0,32); - } -/* #endif */ -#ifdef PURIFY - memset(state,0,STATE_SIZE); - memset(md,0,MD_DIGEST_LENGTH); -#endif - CRYPTO_w_lock(CRYPTO_LOCK_RAND); - init=0; - } - - st_idx=state_index; - st_num=state_num; - state_index+=num; - if (state_index > state_num) - state_index=(state_index%state_num); - - CRYPTO_w_unlock(CRYPTO_LOCK_RAND); - - while (num > 0) - { - j=(num >= MD_DIGEST_LENGTH/2)?MD_DIGEST_LENGTH/2:num; - num-=j; - MD_Init(&m); -#ifndef GETPID_IS_MEANINGLESS - if (curr_pid) /* just in the first iteration to save time */ - { - MD_Update(&m,(unsigned char*)&curr_pid,sizeof curr_pid); - curr_pid = 0; - } -#endif - MD_Update(&m,&(local_md[MD_DIGEST_LENGTH/2]),MD_DIGEST_LENGTH/2); - MD_Update(&m,(unsigned char *)&(md_c[0]),sizeof(md_c)); -#ifndef PURIFY - MD_Update(&m,buf,j); /* purify complains */ -#endif - k=(st_idx+j)-st_num; - if (k > 0) - { - MD_Update(&m,&(state[st_idx]),j-k); - MD_Update(&m,&(state[0]),k); - } - else - MD_Update(&m,&(state[st_idx]),j); - MD_Final(local_md,&m); - - for (i=0; i<j; i++) - { - state[st_idx++]^=local_md[i]; /* may compete with other threads */ - *(buf++)=local_md[i+MD_DIGEST_LENGTH/2]; - if (st_idx >= st_num) - st_idx=0; - } - } - - MD_Init(&m); - MD_Update(&m,(unsigned char *)&(md_c[0]),sizeof(md_c)); - MD_Update(&m,local_md,MD_DIGEST_LENGTH); - CRYPTO_w_lock(CRYPTO_LOCK_RAND); - MD_Update(&m,md,MD_DIGEST_LENGTH); - MD_Final(md,&m); - CRYPTO_w_unlock(CRYPTO_LOCK_RAND); - - memset(&m,0,sizeof(m)); - if (ok) - return(1); - else - { - RANDerr(RAND_F_SSLEAY_RAND_BYTES,RAND_R_PRNG_NOT_SEEDED); - return(0); - } - } - -/* pseudo-random bytes that are guaranteed to be unique but not - unpredictable */ -static int ssleay_rand_pseudo_bytes(unsigned char *buf, int num) - { - int ret, err; - - ret = RAND_bytes(buf, num); - if (ret == 0) - { - err = ERR_peek_error(); - if (ERR_GET_LIB(err) == ERR_LIB_RAND && - ERR_GET_REASON(err) == RAND_R_PRNG_NOT_SEEDED) - (void)ERR_get_error(); - } - return (ret); - } - -int RAND_status(void) - { - if (!initialized) - ssleay_rand_initialize(); - return (entropy >= ENTROPY_NEEDED); - } - -#ifdef WINDOWS -#include <windows.h> -#include <openssl/rand.h> - -/***************************************************************************** - * Initialisation function for the SSL random generator. Takes the contents - * of the screen as random seed. - * - * Created 960901 by Gertjan van Oosten, gertjan@West.NL, West Consulting B.V. - * - * Code adapted from - * <URL:http://www.microsoft.com/kb/developr/win_dk/q97193.htm>; - * the original copyright message is: - * - * (C) Copyright Microsoft Corp. 1993. All rights reserved. - * - * You have a royalty-free right to use, modify, reproduce and - * distribute the Sample Files (and/or any modified version) in - * any way you find useful, provided that you agree that - * Microsoft has no warranty obligations or liability for any - * Sample Application Files which are modified. - */ -/* - * I have modified the loading of bytes via RAND_seed() mechanism since - * the original would have been very very CPU intensive since RAND_seed() - * does an MD5 per 16 bytes of input. The cost to digest 16 bytes is the same - * as that to digest 56 bytes. So under the old system, a screen of - * 1024*768*256 would have been CPU cost of approximately 49,000 56 byte MD5 - * digests or digesting 2.7 mbytes. What I have put in place would - * be 48 16k MD5 digests, or effectively 48*16+48 MD5 bytes or 816 kbytes - * or about 3.5 times as much. - * - eric - */ -void RAND_screen(void) -{ - HDC hScrDC; /* screen DC */ - HDC hMemDC; /* memory DC */ - HBITMAP hBitmap; /* handle for our bitmap */ - HBITMAP hOldBitmap; /* handle for previous bitmap */ - BITMAP bm; /* bitmap properties */ - unsigned int size; /* size of bitmap */ - char *bmbits; /* contents of bitmap */ - int w; /* screen width */ - int h; /* screen height */ - int y; /* y-coordinate of screen lines to grab */ - int n = 16; /* number of screen lines to grab at a time */ - - /* Create a screen DC and a memory DC compatible to screen DC */ - hScrDC = CreateDC("DISPLAY", NULL, NULL, NULL); - hMemDC = CreateCompatibleDC(hScrDC); - - /* Get screen resolution */ - w = GetDeviceCaps(hScrDC, HORZRES); - h = GetDeviceCaps(hScrDC, VERTRES); - - /* Create a bitmap compatible with the screen DC */ - hBitmap = CreateCompatibleBitmap(hScrDC, w, n); - - /* Select new bitmap into memory DC */ - hOldBitmap = SelectObject(hMemDC, hBitmap); - - /* Get bitmap properties */ - GetObject(hBitmap, sizeof(BITMAP), (LPSTR)&bm); - size = (unsigned int)bm.bmWidthBytes * bm.bmHeight * bm.bmPlanes; - - bmbits = Malloc(size); - if (bmbits) { - /* Now go through the whole screen, repeatedly grabbing n lines */ - for (y = 0; y < h-n; y += n) - { - unsigned char md[MD_DIGEST_LENGTH]; - - /* Bitblt screen DC to memory DC */ - BitBlt(hMemDC, 0, 0, w, n, hScrDC, 0, y, SRCCOPY); - - /* Copy bitmap bits from memory DC to bmbits */ - GetBitmapBits(hBitmap, size, bmbits); - - /* Get the MD5 of the bitmap */ - MD(bmbits,size,md); - - /* Seed the random generator with the MD5 digest */ - RAND_seed(md, MD_DIGEST_LENGTH); - } - - Free(bmbits); - } - - /* Select old bitmap back into memory DC */ - hBitmap = SelectObject(hMemDC, hOldBitmap); - - /* Clean up */ - DeleteObject(hBitmap); - DeleteDC(hMemDC); - DeleteDC(hScrDC); -} -#endif |