randfile.c revision 04ef91b390dfcc6125913e2f2af502d23d7a5112
1656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project/* crypto/rand/randfile.c */ 2656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 3656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * All rights reserved. 4656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 5656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * This package is an SSL implementation written 6656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * by Eric Young (eay@cryptsoft.com). 7656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * The implementation was written so as to conform with Netscapes SSL. 8656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 9656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * This library is free for commercial and non-commercial use as long as 10656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * the following conditions are aheared to. The following conditions 11656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * apply to all code found in this distribution, be it the RC4, RSA, 12656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * lhash, DES, etc., code; not just the SSL code. The SSL documentation 13656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * included with this distribution is covered by the same copyright terms 14656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * except that the holder is Tim Hudson (tjh@cryptsoft.com). 15656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 16656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * Copyright remains Eric Young's, and as such any Copyright notices in 17656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * the code are not to be removed. 18656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * If this package is used in a product, Eric Young should be given attribution 19656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * as the author of the parts of the library used. 20656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * This can be in the form of a textual message at program startup or 21656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * in documentation (online or textual) provided with the package. 22656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 23656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * Redistribution and use in source and binary forms, with or without 24656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * modification, are permitted provided that the following conditions 25656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * are met: 26656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 1. Redistributions of source code must retain the copyright 27656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * notice, this list of conditions and the following disclaimer. 28656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 2. Redistributions in binary form must reproduce the above copyright 29656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * notice, this list of conditions and the following disclaimer in the 30656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * documentation and/or other materials provided with the distribution. 31656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 3. All advertising materials mentioning features or use of this software 32656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * must display the following acknowledgement: 33656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * "This product includes cryptographic software written by 34656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * Eric Young (eay@cryptsoft.com)" 35656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * The word 'cryptographic' can be left out if the rouines from the library 36656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * being used are not cryptographic related :-). 37656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 4. If you include any Windows specific code (or a derivative thereof) from 38656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * the apps directory (application code) you must include an acknowledgement: 39656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" 40656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 41656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 42656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 43656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 44656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 45656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 46656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 47656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 48656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 49656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 50656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 51656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * SUCH DAMAGE. 52656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 53656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * The licence and distribution terms for any publically available version or 54656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * derivative of this code cannot be changed. i.e. this code cannot simply be 55656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * copied and put under another distribution licence 56656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * [including the GNU Public Licence.] 57656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project */ 58656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 59656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project/* We need to define this to get macros like S_IFBLK and S_IFCHR */ 6004ef91b390dfcc6125913e2f2af502d23d7a5112Brian Carlstrom#if !defined(OPENSSL_SYS_VXWORKS) 61656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#define _XOPEN_SOURCE 500 6204ef91b390dfcc6125913e2f2af502d23d7a5112Brian Carlstrom#endif 63656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 64656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#include <errno.h> 65656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#include <stdio.h> 66656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#include <stdlib.h> 67656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#include <string.h> 68656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 69656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#include "e_os.h" 70656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#include <openssl/crypto.h> 71656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#include <openssl/rand.h> 72656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#include <openssl/buffer.h> 73656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 74656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#ifdef OPENSSL_SYS_VMS 75656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#include <unixio.h> 76656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#endif 77656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#ifndef NO_SYS_TYPES_H 78656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project# include <sys/types.h> 79656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#endif 80221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom#ifndef OPENSSL_NO_POSIX_IO 81656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project# include <sys/stat.h> 82656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#endif 83656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 84e45f106cb6b47af1f21efe76e933bdea2f5dd1caNagendra Modadugu#ifdef _WIN32 85e45f106cb6b47af1f21efe76e933bdea2f5dd1caNagendra Modadugu#define stat _stat 86e45f106cb6b47af1f21efe76e933bdea2f5dd1caNagendra Modadugu#define chmod _chmod 87e45f106cb6b47af1f21efe76e933bdea2f5dd1caNagendra Modadugu#define open _open 88e45f106cb6b47af1f21efe76e933bdea2f5dd1caNagendra Modadugu#define fdopen _fdopen 89e45f106cb6b47af1f21efe76e933bdea2f5dd1caNagendra Modadugu#endif 90e45f106cb6b47af1f21efe76e933bdea2f5dd1caNagendra Modadugu 91656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#undef BUFSIZE 92656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#define BUFSIZE 1024 93656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#define RAND_DATA 1024 94656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 95e45f106cb6b47af1f21efe76e933bdea2f5dd1caNagendra Modadugu#ifdef OPENSSL_SYS_VMS 96e45f106cb6b47af1f21efe76e933bdea2f5dd1caNagendra Modadugu/* This declaration is a nasty hack to get around vms' extension to fopen 97e45f106cb6b47af1f21efe76e933bdea2f5dd1caNagendra Modadugu * for passing in sharing options being disabled by our /STANDARD=ANSI89 */ 98e45f106cb6b47af1f21efe76e933bdea2f5dd1caNagendra Modadugustatic FILE *(*const vms_fopen)(const char *, const char *, ...) = 99e45f106cb6b47af1f21efe76e933bdea2f5dd1caNagendra Modadugu (FILE *(*)(const char *, const char *, ...))fopen; 100e45f106cb6b47af1f21efe76e933bdea2f5dd1caNagendra Modadugu#define VMS_OPEN_ATTRS "shr=get,put,upd,del","ctx=bin,stm","rfm=stm","rat=none","mrs=0" 101e45f106cb6b47af1f21efe76e933bdea2f5dd1caNagendra Modadugu#endif 102e45f106cb6b47af1f21efe76e933bdea2f5dd1caNagendra Modadugu 103656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project/* #define RFILE ".rnd" - defined in ../../e_os.h */ 104656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 105656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project/* Note that these functions are intended for seed files only. 106656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * Entropy devices and EGD sockets are handled in rand_unix.c */ 107656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 108656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Projectint RAND_load_file(const char *file, long bytes) 109656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 110656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* If bytes >= 0, read up to 'bytes' bytes. 111656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * if bytes == -1, read complete file. */ 112656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 113656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project MS_STATIC unsigned char buf[BUFSIZE]; 114221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom#ifndef OPENSSL_NO_POSIX_IO 115656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project struct stat sb; 116221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom#endif 117656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project int i,ret=0,n; 118656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project FILE *in; 119656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 120656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (file == NULL) return(0); 121656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 122221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom#ifndef OPENSSL_NO_POSIX_IO 12398d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom#ifdef PURIFY 12498d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom /* struct stat can have padding and unused fields that may not be 12598d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom * initialized in the call to stat(). We need to clear the entire 12698d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom * structure before calling RAND_add() to avoid complaints from 12798d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom * applications such as Valgrind. 12898d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom */ 12998d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom memset(&sb, 0, sizeof(sb)); 13098d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom#endif 131656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (stat(file,&sb) < 0) return(0); 132656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project RAND_add(&sb,sizeof(sb),0.0); 133221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom#endif 134656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (bytes == 0) return(ret); 135656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 136e45f106cb6b47af1f21efe76e933bdea2f5dd1caNagendra Modadugu#ifdef OPENSSL_SYS_VMS 137e45f106cb6b47af1f21efe76e933bdea2f5dd1caNagendra Modadugu in=vms_fopen(file,"rb",VMS_OPEN_ATTRS); 138e45f106cb6b47af1f21efe76e933bdea2f5dd1caNagendra Modadugu#else 139656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project in=fopen(file,"rb"); 140e45f106cb6b47af1f21efe76e933bdea2f5dd1caNagendra Modadugu#endif 141656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (in == NULL) goto err; 1427d3d122363e2a85d516db314892f3d6112cb1377Brian Carlstrom#if defined(S_IFBLK) && defined(S_IFCHR) && !defined(OPENSSL_NO_POSIX_IO) 143221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom if (sb.st_mode & (S_IFBLK | S_IFCHR)) { 144656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* this file is a device. we don't want read an infinite number 145656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * of bytes from a random device, nor do we want to use buffered 146656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * I/O because we will waste system entropy. 147656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project */ 148656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project bytes = (bytes == -1) ? 2048 : bytes; /* ok, is 2048 enough? */ 149ee7afb3c942c4eefef6ed06201eafaf8ec58e2e3Brian Carlstrom#ifndef OPENSSL_NO_SETVBUF_IONBF 150656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project setvbuf(in, NULL, _IONBF, 0); /* don't do buffered reads */ 151ee7afb3c942c4eefef6ed06201eafaf8ec58e2e3Brian Carlstrom#endif /* ndef OPENSSL_NO_SETVBUF_IONBF */ 152656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 153656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#endif 154656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project for (;;) 155656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 156656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (bytes > 0) 157656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project n = (bytes < BUFSIZE)?(int)bytes:BUFSIZE; 158656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project else 159656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project n = BUFSIZE; 160656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project i=fread(buf,1,n,in); 161656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (i <= 0) break; 162656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#ifdef PURIFY 163656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project RAND_add(buf,i,(double)i); 164656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#else 165656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* even if n != i, use the full array */ 166656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project RAND_add(buf,n,(double)i); 167656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#endif 168656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project ret+=i; 169656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (bytes > 0) 170656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 171656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project bytes-=n; 172656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (bytes <= 0) break; 173656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 174656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 175656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project fclose(in); 176656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project OPENSSL_cleanse(buf,BUFSIZE); 177656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Projecterr: 178656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return(ret); 179656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 180656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 181656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Projectint RAND_write_file(const char *file) 182656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 183656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project unsigned char buf[BUFSIZE]; 184656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project int i,ret=0,rand_err=0; 185656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project FILE *out = NULL; 186656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project int n; 187221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom#ifndef OPENSSL_NO_POSIX_IO 188656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project struct stat sb; 189656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 190656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project i=stat(file,&sb); 191656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (i != -1) { 19298d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom#if defined(S_ISBLK) && defined(S_ISCHR) 19398d58bb80c64b02a33662f0ea80351d4a1535267Brian Carlstrom if (S_ISBLK(sb.st_mode) || S_ISCHR(sb.st_mode)) { 194656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* this file is a device. we don't write back to it. 195656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * we "succeed" on the assumption this is some sort 196656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * of random device. Otherwise attempting to write to 197656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * and chmod the device causes problems. 198656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project */ 199656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return(1); 200656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 201656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#endif 202656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 203221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom#endif 204656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 205221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom#if defined(O_CREAT) && !defined(OPENSSL_NO_POSIX_IO) && !defined(OPENSSL_SYS_VMS) 206656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 207221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom#ifndef O_BINARY 208221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom#define O_BINARY 0 209221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom#endif 210656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* chmod(..., 0600) is too late to protect the file, 211656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * permissions should be restrictive from the start */ 212221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom int fd = open(file, O_WRONLY|O_CREAT|O_BINARY, 0600); 213656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (fd != -1) 214656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project out = fdopen(fd, "wb"); 215656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 216656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#endif 217e45f106cb6b47af1f21efe76e933bdea2f5dd1caNagendra Modadugu 218e45f106cb6b47af1f21efe76e933bdea2f5dd1caNagendra Modadugu#ifdef OPENSSL_SYS_VMS 219e45f106cb6b47af1f21efe76e933bdea2f5dd1caNagendra Modadugu /* VMS NOTE: Prior versions of this routine created a _new_ 220e45f106cb6b47af1f21efe76e933bdea2f5dd1caNagendra Modadugu * version of the rand file for each call into this routine, then 221e45f106cb6b47af1f21efe76e933bdea2f5dd1caNagendra Modadugu * deleted all existing versions named ;-1, and finally renamed 222e45f106cb6b47af1f21efe76e933bdea2f5dd1caNagendra Modadugu * the current version as ';1'. Under concurrent usage, this 223e45f106cb6b47af1f21efe76e933bdea2f5dd1caNagendra Modadugu * resulted in an RMS race condition in rename() which could 224e45f106cb6b47af1f21efe76e933bdea2f5dd1caNagendra Modadugu * orphan files (see vms message help for RMS$_REENT). With the 225e45f106cb6b47af1f21efe76e933bdea2f5dd1caNagendra Modadugu * fopen() calls below, openssl/VMS now shares the top-level 226e45f106cb6b47af1f21efe76e933bdea2f5dd1caNagendra Modadugu * version of the rand file. Note that there may still be 227e45f106cb6b47af1f21efe76e933bdea2f5dd1caNagendra Modadugu * conditions where the top-level rand file is locked. If so, this 228e45f106cb6b47af1f21efe76e933bdea2f5dd1caNagendra Modadugu * code will then create a new version of the rand file. Without 229e45f106cb6b47af1f21efe76e933bdea2f5dd1caNagendra Modadugu * the delete and rename code, this can result in ascending file 230e45f106cb6b47af1f21efe76e933bdea2f5dd1caNagendra Modadugu * versions that stop at version 32767, and this routine will then 231e45f106cb6b47af1f21efe76e933bdea2f5dd1caNagendra Modadugu * return an error. The remedy for this is to recode the calling 232e45f106cb6b47af1f21efe76e933bdea2f5dd1caNagendra Modadugu * application to avoid concurrent use of the rand file, or 233e45f106cb6b47af1f21efe76e933bdea2f5dd1caNagendra Modadugu * synchronize usage at the application level. Also consider 234e45f106cb6b47af1f21efe76e933bdea2f5dd1caNagendra Modadugu * whether or not you NEED a persistent rand file in a concurrent 235e45f106cb6b47af1f21efe76e933bdea2f5dd1caNagendra Modadugu * use situation. 236e45f106cb6b47af1f21efe76e933bdea2f5dd1caNagendra Modadugu */ 237e45f106cb6b47af1f21efe76e933bdea2f5dd1caNagendra Modadugu 238e45f106cb6b47af1f21efe76e933bdea2f5dd1caNagendra Modadugu out = vms_fopen(file,"rb+",VMS_OPEN_ATTRS); 239e45f106cb6b47af1f21efe76e933bdea2f5dd1caNagendra Modadugu if (out == NULL) 240e45f106cb6b47af1f21efe76e933bdea2f5dd1caNagendra Modadugu out = vms_fopen(file,"wb",VMS_OPEN_ATTRS); 241e45f106cb6b47af1f21efe76e933bdea2f5dd1caNagendra Modadugu#else 242656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (out == NULL) 243656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project out = fopen(file,"wb"); 244e45f106cb6b47af1f21efe76e933bdea2f5dd1caNagendra Modadugu#endif 245656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (out == NULL) goto err; 246656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 247656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#ifndef NO_CHMOD 248656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project chmod(file,0600); 249656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#endif 250656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project n=RAND_DATA; 251656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project for (;;) 252656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 253656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project i=(n > BUFSIZE)?BUFSIZE:n; 254656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project n-=BUFSIZE; 255656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (RAND_bytes(buf,i) <= 0) 256656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project rand_err=1; 257656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project i=fwrite(buf,1,i,out); 258656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (i <= 0) 259656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 260656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project ret=0; 261656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project break; 262656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 263656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project ret+=i; 264656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (n <= 0) break; 265656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 266656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 267656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project fclose(out); 268656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project OPENSSL_cleanse(buf,BUFSIZE); 269656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Projecterr: 270656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return (rand_err ? -1 : ret); 271656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 272656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 273656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Projectconst char *RAND_file_name(char *buf, size_t size) 274656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 275656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project char *s=NULL; 276656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#ifdef __OpenBSD__ 277656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project struct stat sb; 278656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#endif 279656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 280656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (OPENSSL_issetugid() == 0) 281656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project s=getenv("RANDFILE"); 282656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (s != NULL && *s && strlen(s) + 1 < size) 283656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 284656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (BUF_strlcpy(buf,s,size) >= size) 285656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return NULL; 286656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 287656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project else 288656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 289656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (OPENSSL_issetugid() == 0) 290656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project s=getenv("HOME"); 291656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#ifdef DEFAULT_HOME 292656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (s == NULL) 293656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 294656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project s = DEFAULT_HOME; 295656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 296656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#endif 297656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (s && *s && strlen(s)+strlen(RFILE)+2 < size) 298656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project { 299656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project BUF_strlcpy(buf,s,size); 300656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#ifndef OPENSSL_SYS_VMS 301656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project BUF_strlcat(buf,"/",size); 302656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#endif 303656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project BUF_strlcat(buf,RFILE,size); 304656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 305656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project else 306656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project buf[0] = '\0'; /* no file name */ 307656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 308656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 309656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#ifdef __OpenBSD__ 310656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* given that all random loads just fail if the file can't be 311656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * seen on a stat, we stat the file we're returning, if it 312656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * fails, use /dev/arandom instead. this allows the user to 313656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * use their own source for good random data, but defaults 314656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * to something hopefully decent if that isn't available. 315656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project */ 316656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 317976a034585c7e8ff9dda5ebe032f399b78887f70Brian Carlstrom if (!buf[0]) 318656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (BUF_strlcpy(buf,"/dev/arandom",size) >= size) { 319656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return(NULL); 320656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 321656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (stat(buf,&sb) == -1) 322656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if (BUF_strlcpy(buf,"/dev/arandom",size) >= size) { 323656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return(NULL); 324656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 325656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 326656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#endif 327656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return(buf); 328656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 329