-/* crypto/rand/randfile.c */
-/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
- * All rights reserved.
+/*
+ * Copyright 1995-2016 The OpenSSL Project Authors. 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.]
+ * Licensed under the OpenSSL license (the "License"). You may not use
+ * this file except in compliance with the License. You can obtain a copy
+ * in the file LICENSE in the source distribution or at
+ * https://www.openssl.org/source/license.html
*/
-/* We need to define this to get macros like S_IFBLK and S_IFCHR */
-#define _XOPEN_SOURCE 500
+#include "e_os.h"
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
-#include "e_os.h"
#include <openssl/crypto.h>
#include <openssl/rand.h>
#include <openssl/buffer.h>
#ifdef OPENSSL_SYS_VMS
-#include <unixio.h>
+# include <unixio.h>
#endif
#ifndef NO_SYS_TYPES_H
# include <sys/types.h>
#endif
#ifndef OPENSSL_NO_POSIX_IO
# include <sys/stat.h>
+# include <fcntl.h>
+/*
+ * Following should not be needed, and we could have been stricter
+ * and demand S_IS*. But some systems just don't comply... Formally
+ * below macros are "anatomically incorrect", because normally they
+ * would look like ((m) & MASK == TYPE), but since MASK availability
+ * is as questionable, we settle for this poor-man fallback...
+ */
+# if !defined(S_ISBLK)
+# if defined(_S_IFBLK)
+# define S_ISBLK(m) ((m) & _S_IFBLK)
+# elif defined(S_IFBLK)
+# define S_ISBLK(m) ((m) & S_IFBLK)
+# elif defined(_WIN32)
+# define S_ISBLK(m) 0 /* no concept of block devices on Windows */
+# endif
+# endif
+# if !defined(S_ISCHR)
+# if defined(_S_IFCHR)
+# define S_ISCHR(m) ((m) & _S_IFCHR)
+# elif defined(S_IFCHR)
+# define S_ISCHR(m) ((m) & S_IFCHR)
+# endif
+# endif
#endif
#ifdef _WIN32
-#define stat _stat
-#define chmod _chmod
-#define open _open
-#define fdopen _fdopen
+# define stat _stat
+# define chmod _chmod
+# define open _open
+# define fdopen _fdopen
#endif
#undef BUFSIZE
-#define BUFSIZE 1024
+#define BUFSIZE 1024
#define RAND_DATA 1024
#ifdef OPENSSL_SYS_VMS
-/* This declaration is a nasty hack to get around vms' extension to fopen
- * for passing in sharing options being disabled by our /STANDARD=ANSI89 */
-static FILE *(*const vms_fopen)(const char *, const char *, ...) =
- (FILE *(*)(const char *, const char *, ...))fopen;
-#define VMS_OPEN_ATTRS "shr=get,put,upd,del","ctx=bin,stm","rfm=stm","rat=none","mrs=0"
+/*
+ * Misc hacks needed for specific cases.
+ *
+ * __FILE_ptr32 is a type provided by DEC C headers (types.h specifically)
+ * to make sure the FILE* is a 32-bit pointer no matter what. We know that
+ * stdio function return this type (a study of stdio.h proves it).
+ * Additionally, we create a similar char pointer type for the sake of
+ * vms_setbuf below.
+ */
+# if __INITIAL_POINTER_SIZE == 64
+# pragma pointer_size save
+# pragma pointer_size 32
+# endif
+typedef char *char_ptr32;
+# if __INITIAL_POINTER_SIZE == 64
+# pragma pointer_size restore
+# endif
+
+/*
+ * On VMS, setbuf() will only take 32-bit pointers, and a compilation
+ * with /POINTER_SIZE=64 will give off a MAYLOSEDATA2 warning here.
+ * Since we know that the FILE* really is a 32-bit pointer expanded to
+ * 64 bits, we also know it's safe to convert it back to a 32-bit pointer.
+ * As for the buffer parameter, we only use NULL here, so that passes as
+ * well...
+ */
+static void vms_setbuf(FILE *fp, char *buf)
+{
+ setbuf((__FILE_ptr32)fp, (char_ptr32)buf);
+}
+/*
+ * This declaration is a nasty hack to get around vms' extension to fopen for
+ * passing in sharing options being disabled by /STANDARD=ANSI89
+ */
+static __FILE_ptr32 (*const vms_fopen)(const char *, const char *, ...) =
+ (__FILE_ptr32 (*)(const char *, const char *, ...))fopen;
+# define VMS_OPEN_ATTRS "shr=get,put,upd,del","ctx=bin,stm","rfm=stm","rat=none","mrs=0"
+
+# define fopen(fname,mode) vms_fopen((fname), (mode), VMS_OPEN_ATTRS)
+# define setbuf(fp,buf) vms_setbuf((fp), (buf))
#endif
-/* #define RFILE ".rnd" - defined in ../../e_os.h */
+#define RFILE ".rnd"
-/* Note that these functions are intended for seed files only.
- * Entropy devices and EGD sockets are handled in rand_unix.c */
+/*
+ * Note that these functions are intended for seed files only. Entropy
+ * devices and EGD sockets are handled in rand_unix.c
+ */
int RAND_load_file(const char *file, long bytes)
- {
- /* If bytes >= 0, read up to 'bytes' bytes.
- * if bytes == -1, read complete file. */
+{
+ /*-
+ * If bytes >= 0, read up to 'bytes' bytes.
+ * if bytes == -1, read complete file.
+ */
- MS_STATIC unsigned char buf[BUFSIZE];
+ unsigned char buf[BUFSIZE];
#ifndef OPENSSL_NO_POSIX_IO
- struct stat sb;
+ struct stat sb;
#endif
- int i,ret=0,n;
- FILE *in;
+ int i, ret = 0, n;
+ FILE *in;
- if (file == NULL) return(0);
+ if (file == NULL)
+ return (0);
#ifndef OPENSSL_NO_POSIX_IO
- if (stat(file,&sb) < 0) return(0);
- RAND_add(&sb,sizeof(sb),0.0);
+ /*
+ * struct stat can have padding and unused fields that may not be
+ * initialized in the call to stat(). We need to clear the entire
+ * structure before calling RAND_add() to avoid complaints from
+ * applications such as Valgrind.
+ */
+ memset(&sb, 0, sizeof(sb));
+ if (stat(file, &sb) < 0)
+ return (0);
+ RAND_add(&sb, sizeof(sb), 0.0);
#endif
- if (bytes == 0) return(ret);
+ if (bytes == 0)
+ return (ret);
-#ifdef OPENSSL_SYS_VMS
- in=vms_fopen(file,"rb",VMS_OPEN_ATTRS);
-#else
- in=fopen(file,"rb");
+ in = fopen(file, "rb");
+ if (in == NULL)
+ goto err;
+#if defined(S_ISBLK) && defined(S_ISCHR) && !defined(OPENSSL_NO_POSIX_IO)
+ if (S_ISBLK(sb.st_mode) || S_ISCHR(sb.st_mode)) {
+ /*
+ * this file is a device. we don't want read an infinite number of
+ * bytes from a random device, nor do we want to use buffered I/O
+ * because we will waste system entropy.
+ */
+ bytes = (bytes == -1) ? 2048 : bytes; /* ok, is 2048 enough? */
+ setbuf(in, NULL); /* don't do buffered reads */
+ }
#endif
- if (in == NULL) goto err;
-#if defined(S_IFBLK) && defined(S_IFCHR) && !defined(OPNESSL_NO_POSIX_IO)
- if (sb.st_mode & (S_IFBLK | S_IFCHR)) {
- /* this file is a device. we don't want read an infinite number
- * of bytes from a random device, nor do we want to use buffered
- * I/O because we will waste system entropy.
- */
- bytes = (bytes == -1) ? 2048 : bytes; /* ok, is 2048 enough? */
- setvbuf(in, NULL, _IONBF, 0); /* don't do buffered reads */
- }
-#endif
- for (;;)
- {
- if (bytes > 0)
- n = (bytes < BUFSIZE)?(int)bytes:BUFSIZE;
- else
- n = BUFSIZE;
- i=fread(buf,1,n,in);
- if (i <= 0) break;
-#ifdef PURIFY
- RAND_add(buf,i,(double)i);
-#else
- /* even if n != i, use the full array */
- RAND_add(buf,n,(double)i);
-#endif
- ret+=i;
- if (bytes > 0)
- {
- bytes-=n;
- if (bytes <= 0) break;
- }
- }
- fclose(in);
- OPENSSL_cleanse(buf,BUFSIZE);
-err:
- return(ret);
- }
+ for (;;) {
+ if (bytes > 0)
+ n = (bytes < BUFSIZE) ? (int)bytes : BUFSIZE;
+ else
+ n = BUFSIZE;
+ i = fread(buf, 1, n, in);
+ if (i <= 0)
+ break;
+
+ RAND_add(buf, i, (double)i);
+ ret += i;
+ if (bytes > 0) {
+ bytes -= n;
+ if (bytes <= 0)
+ break;
+ }
+ }
+ fclose(in);
+ OPENSSL_cleanse(buf, BUFSIZE);
+ err:
+ return (ret);
+}
int RAND_write_file(const char *file)
- {
- unsigned char buf[BUFSIZE];
- int i,ret=0,rand_err=0;
- FILE *out = NULL;
- int n;
+{
+ unsigned char buf[BUFSIZE];
+ int i, ret = 0, rand_err = 0;
+ FILE *out = NULL;
+ int n;
#ifndef OPENSSL_NO_POSIX_IO
- struct stat sb;
-
- i=stat(file,&sb);
- if (i != -1) {
-#if defined(S_IFBLK) && defined(S_IFCHR)
- if (sb.st_mode & (S_IFBLK | S_IFCHR)) {
- /* this file is a device. we don't write back to it.
- * we "succeed" on the assumption this is some sort
- * of random device. Otherwise attempting to write to
- * and chmod the device causes problems.
- */
- return(1);
- }
-#endif
- }
+ struct stat sb;
+
+ i = stat(file, &sb);
+ if (i != -1) {
+# if defined(S_ISBLK) && defined(S_ISCHR)
+ if (S_ISBLK(sb.st_mode) || S_ISCHR(sb.st_mode)) {
+ /*
+ * this file is a device. we don't write back to it. we
+ * "succeed" on the assumption this is some sort of random
+ * device. Otherwise attempting to write to and chmod the device
+ * causes problems.
+ */
+ return (1);
+ }
+# endif
+ }
#endif
#if defined(O_CREAT) && !defined(OPENSSL_NO_POSIX_IO) && !defined(OPENSSL_SYS_VMS)
- {
-#ifndef O_BINARY
-#define O_BINARY 0
-#endif
- /* chmod(..., 0600) is too late to protect the file,
- * permissions should be restrictive from the start */
- int fd = open(file, O_WRONLY|O_CREAT|O_BINARY, 0600);
- if (fd != -1)
- out = fdopen(fd, "wb");
- }
+ {
+# ifndef O_BINARY
+# define O_BINARY 0
+# endif
+ /*
+ * chmod(..., 0600) is too late to protect the file, permissions
+ * should be restrictive from the start
+ */
+ int fd = open(file, O_WRONLY | O_CREAT | O_BINARY, 0600);
+ if (fd != -1)
+ out = fdopen(fd, "wb");
+ }
#endif
#ifdef OPENSSL_SYS_VMS
- /* VMS NOTE: Prior versions of this routine created a _new_
- * version of the rand file for each call into this routine, then
- * deleted all existing versions named ;-1, and finally renamed
- * the current version as ';1'. Under concurrent usage, this
- * resulted in an RMS race condition in rename() which could
- * orphan files (see vms message help for RMS$_REENT). With the
- * fopen() calls below, openssl/VMS now shares the top-level
- * version of the rand file. Note that there may still be
- * conditions where the top-level rand file is locked. If so, this
- * code will then create a new version of the rand file. Without
- * the delete and rename code, this can result in ascending file
- * versions that stop at version 32767, and this routine will then
- * return an error. The remedy for this is to recode the calling
- * application to avoid concurrent use of the rand file, or
- * synchronize usage at the application level. Also consider
- * whether or not you NEED a persistent rand file in a concurrent
- * use situation.
- */
+ /*
+ * VMS NOTE: Prior versions of this routine created a _new_ version of
+ * the rand file for each call into this routine, then deleted all
+ * existing versions named ;-1, and finally renamed the current version
+ * as ';1'. Under concurrent usage, this resulted in an RMS race
+ * condition in rename() which could orphan files (see vms message help
+ * for RMS$_REENT). With the fopen() calls below, openssl/VMS now shares
+ * the top-level version of the rand file. Note that there may still be
+ * conditions where the top-level rand file is locked. If so, this code
+ * will then create a new version of the rand file. Without the delete
+ * and rename code, this can result in ascending file versions that stop
+ * at version 32767, and this routine will then return an error. The
+ * remedy for this is to recode the calling application to avoid
+ * concurrent use of the rand file, or synchronize usage at the
+ * application level. Also consider whether or not you NEED a persistent
+ * rand file in a concurrent use situation.
+ */
- out = vms_fopen(file,"rb+",VMS_OPEN_ATTRS);
- if (out == NULL)
- out = vms_fopen(file,"wb",VMS_OPEN_ATTRS);
-#else
- if (out == NULL)
- out = fopen(file,"wb");
+ out = fopen(file, "rb+");
#endif
- if (out == NULL) goto err;
+ if (out == NULL)
+ out = fopen(file, "wb");
+ if (out == NULL)
+ goto err;
-#ifndef NO_CHMOD
- chmod(file,0600);
+#if !defined(NO_CHMOD) && !defined(OPENSSL_NO_POSIX_IO)
+ chmod(file, 0600);
#endif
- n=RAND_DATA;
- for (;;)
- {
- i=(n > BUFSIZE)?BUFSIZE:n;
- n-=BUFSIZE;
- if (RAND_bytes(buf,i) <= 0)
- rand_err=1;
- i=fwrite(buf,1,i,out);
- if (i <= 0)
- {
- ret=0;
- break;
- }
- ret+=i;
- if (n <= 0) break;
- }
+ n = RAND_DATA;
+ for (;;) {
+ i = (n > BUFSIZE) ? BUFSIZE : n;
+ n -= BUFSIZE;
+ if (RAND_bytes(buf, i) <= 0)
+ rand_err = 1;
+ i = fwrite(buf, 1, i, out);
+ if (i <= 0) {
+ ret = 0;
+ break;
+ }
+ ret += i;
+ if (n <= 0)
+ break;
+ }
- fclose(out);
- OPENSSL_cleanse(buf,BUFSIZE);
-err:
- return (rand_err ? -1 : ret);
- }
+ fclose(out);
+ OPENSSL_cleanse(buf, BUFSIZE);
+ err:
+ return (rand_err ? -1 : ret);
+}
const char *RAND_file_name(char *buf, size_t size)
- {
- char *s=NULL;
- int ok = 0;
+{
+ char *s = NULL;
#ifdef __OpenBSD__
- struct stat sb;
+ struct stat sb;
#endif
- if (OPENSSL_issetugid() == 0)
- s=getenv("RANDFILE");
- if (s != NULL && *s && strlen(s) + 1 < size)
- {
- if (BUF_strlcpy(buf,s,size) >= size)
- return NULL;
- }
- else
- {
- if (OPENSSL_issetugid() == 0)
- s=getenv("HOME");
+ if (OPENSSL_issetugid() == 0)
+ s = getenv("RANDFILE");
+ if (s != NULL && *s && strlen(s) + 1 < size) {
+ if (OPENSSL_strlcpy(buf, s, size) >= size)
+ return NULL;
+ } else {
+#ifdef OPENSSL_SYS_WINDOWS
+ /*
+ * We use the same env variables as GetTempFile() - but that function
+ * uses TCHARs, but getenv() gives us chars so its easier to do it this
+ * way
+ */
+ if ((s = getenv("TMP")) == NULL
+ && (s = getenv("TEMP")) == NULL
+ && (s = getenv("USERPROFILE")) == NULL
+ && (s = getenv("SYSTEMROOT")) == NULL) {
+ s = getenv("HOME");
+ }
+#else
+ if (OPENSSL_issetugid() == 0)
+ s = getenv("HOME");
+#endif
#ifdef DEFAULT_HOME
- if (s == NULL)
- {
- s = DEFAULT_HOME;
- }
+ if (s == NULL) {
+ s = DEFAULT_HOME;
+ }
#endif
- if (s && *s && strlen(s)+strlen(RFILE)+2 < size)
- {
- BUF_strlcpy(buf,s,size);
+ if (s && *s && strlen(s) + strlen(RFILE) + 2 < size) {
+ OPENSSL_strlcpy(buf, s, size);
#ifndef OPENSSL_SYS_VMS
- BUF_strlcat(buf,"/",size);
+ OPENSSL_strlcat(buf, "/", size);
#endif
- BUF_strlcat(buf,RFILE,size);
- ok = 1;
- }
- else
- buf[0] = '\0'; /* no file name */
- }
+ OPENSSL_strlcat(buf, RFILE, size);
+ } else
+ buf[0] = '\0'; /* no file name */
+ }
#ifdef __OpenBSD__
- /* given that all random loads just fail if the file can't be
- * seen on a stat, we stat the file we're returning, if it
- * fails, use /dev/arandom instead. this allows the user to
- * use their own source for good random data, but defaults
- * to something hopefully decent if that isn't available.
- */
-
- if (!ok)
- if (BUF_strlcpy(buf,"/dev/arandom",size) >= size) {
- return(NULL);
- }
- if (stat(buf,&sb) == -1)
- if (BUF_strlcpy(buf,"/dev/arandom",size) >= size) {
- return(NULL);
- }
+ /*
+ * given that all random loads just fail if the file can't be seen on a
+ * stat, we stat the file we're returning, if it fails, use /dev/arandom
+ * instead. this allows the user to use their own source for good random
+ * data, but defaults to something hopefully decent if that isn't
+ * available.
+ */
+ if (!buf[0])
+ if (OPENSSL_strlcpy(buf, "/dev/arandom", size) >= size) {
+ return (NULL);
+ }
+ if (stat(buf, &sb) == -1)
+ if (OPENSSL_strlcpy(buf, "/dev/arandom", size) >= size) {
+ return (NULL);
+ }
#endif
- return(buf);
- }
+ return (buf);
+}
projects / openssl.git / blobdiff