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This commit is contained in:
zhaoxiaomeng
2018-01-04 13:38:57 +08:00
committed by Simon
parent d11f845fde
commit 53af3b51ae
2361 changed files with 387455 additions and 144458 deletions
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284
crypto/rand/randfile.c
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@@ -1,19 +1,67 @@
/*
* Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
/* crypto/rand/randfile.c */
/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
* All rights reserved.
*
* 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
* 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 "internal/cryptlib.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>
@@ -57,52 +105,23 @@
# define chmod _chmod
# define open _open
# define fdopen _fdopen
# define fstat _fstat
# define fileno _fileno
#endif
#undef BUFSIZE
#define BUFSIZE 1024
#define RAND_DATA 1024
#ifdef OPENSSL_SYS_VMS
/*
* 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
typedef char *char_ptr32;
# pragma pointer_size restore
/*
* 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...
*/
# define setbuf(fp,buf) (setbuf)((__FILE_ptr32)(fp), (char_ptr32)(buf))
# endif
#if (defined(OPENSSL_SYS_VMS) && (defined(__alpha) || defined(__ia64)))
/*
* This declaration is a nasty hack to get around vms' extension to fopen for
* passing in sharing options being disabled by /STANDARD=ANSI89
* passing in sharing options being disabled by our /STANDARD=ANSI89
*/
static __FILE_ptr32 (*const vms_fopen)(const char *, const char *, ...) =
(__FILE_ptr32 (*)(const char *, const char *, ...))fopen;
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"
# define openssl_fopen(fname,mode) vms_fopen((fname), (mode), VMS_OPEN_ATTRS)
#endif
#define RFILE ".rnd"
/* #define RFILE ".rnd" - defined in ../../e_os.h */
/*
* Note that these functions are intended for seed files only. Entropy
@@ -116,24 +135,35 @@ int RAND_load_file(const char *file, long bytes)
* if bytes == -1, read complete file.
*/
unsigned char buf[BUFSIZE];
MS_STATIC unsigned char buf[BUFSIZE];
#ifndef OPENSSL_NO_POSIX_IO
struct stat sb;
#endif
int i, ret = 0, n;
FILE *in = NULL;
/*
* If setvbuf() is to be called, then the FILE pointer
* to it must be 32 bit.
*/
#if !defined OPENSSL_NO_SETVBUF_IONBF && defined(OPENSSL_SYS_VMS) && defined(__VMS_VER) && (__VMS_VER >= 70000000)
/* For 64-bit-->32 bit API Support*/
#if __INITIAL_POINTER_SIZE == 64
#pragma __required_pointer_size __save
#pragma __required_pointer_size 32
#endif
FILE *in; /* setvbuf() requires 32-bit pointers */
#if __INITIAL_POINTER_SIZE == 64
#pragma __required_pointer_size __restore
#endif
#else
FILE *in;
#endif /* OPENSSL_SYS_VMS */
if (file == NULL)
return 0;
if (bytes == 0)
return ret;
in = openssl_fopen(file, "rb");
if (in == NULL)
goto err;
return (0);
#ifndef OPENSSL_NO_POSIX_IO
# ifdef PURIFY
/*
* struct stat can have padding and unused fields that may not be
* initialized in the call to stat(). We need to clear the entire
@@ -141,11 +171,22 @@ int RAND_load_file(const char *file, long bytes)
* applications such as Valgrind.
*/
memset(&sb, 0, sizeof(sb));
if (fstat(fileno(in), &sb) < 0)
goto err;
# endif
if (stat(file, &sb) < 0)
return (0);
RAND_add(&sb, sizeof(sb), 0.0);
#endif
if (bytes == 0)
return (ret);
# if defined(S_ISBLK) && defined(S_ISCHR)
#ifdef OPENSSL_SYS_VMS
in = vms_fopen(file, "rb", VMS_OPEN_ATTRS);
#else
in = fopen(file, "rb");
#endif
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
@@ -153,9 +194,10 @@ int RAND_load_file(const char *file, long bytes)
* because we will waste system entropy.
*/
bytes = (bytes == -1) ? 2048 : bytes; /* ok, is 2048 enough? */
setbuf(in, NULL); /* don't do buffered reads */
# ifndef OPENSSL_NO_SETVBUF_IONBF
setvbuf(in, NULL, _IONBF, 0); /* don't do buffered reads */
# endif /* ndef OPENSSL_NO_SETVBUF_IONBF */
}
# endif
#endif
for (;;) {
if (bytes > 0)
@@ -165,8 +207,12 @@ int RAND_load_file(const char *file, long bytes)
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;
@@ -174,11 +220,10 @@ int RAND_load_file(const char *file, long bytes)
break;
}
}
fclose(in);
OPENSSL_cleanse(buf, BUFSIZE);
err:
if (in != NULL)
fclose(in);
return ret;
return (ret);
}
int RAND_write_file(const char *file)
@@ -190,15 +235,9 @@ int RAND_write_file(const char *file)
#ifndef OPENSSL_NO_POSIX_IO
struct stat sb;
# if defined(S_ISBLK) && defined(S_ISCHR)
# ifdef _WIN32
/*
* Check for |file| being a driver as "ASCII-safe" on Windows,
* because driver paths are always ASCII.
*/
# endif
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
@@ -206,14 +245,13 @@ int RAND_write_file(const char *file)
* device. Otherwise attempting to write to and chmod the device
* causes problems.
*/
return 1;
return (1);
}
}
# endif
}
#endif
#if defined(O_CREAT) && !defined(OPENSSL_NO_POSIX_IO) && \
!defined(OPENSSL_SYS_VMS) && !defined(OPENSSL_SYS_WINDOWS)
#if defined(O_CREAT) && !defined(OPENSSL_NO_POSIX_IO) && !defined(OPENSSL_SYS_VMS)
{
# ifndef O_BINARY
# define O_BINARY 0
@@ -228,7 +266,7 @@ int RAND_write_file(const char *file)
}
#endif
#ifdef OPENSSL_SYS_VMS
#if (defined(OPENSSL_SYS_VMS) && (defined(__alpha) || defined(__ia64)))
/*
* VMS NOTE: Prior versions of this routine created a _new_ version of
* the rand file for each call into this routine, then deleted all
@@ -247,14 +285,17 @@ int RAND_write_file(const char *file)
* rand file in a concurrent use situation.
*/
out = openssl_fopen(file, "rb+");
#endif
out = vms_fopen(file, "rb+", VMS_OPEN_ATTRS);
if (out == NULL)
out = openssl_fopen(file, "wb");
out = vms_fopen(file, "wb", VMS_OPEN_ATTRS);
#else
if (out == NULL)
out = fopen(file, "wb");
#endif
if (out == NULL)
goto err;
#if !defined(NO_CHMOD) && !defined(OPENSSL_NO_POSIX_IO)
#ifndef NO_CHMOD
chmod(file, 0600);
#endif
n = RAND_DATA;
@@ -282,70 +323,31 @@ int RAND_write_file(const char *file)
const char *RAND_file_name(char *buf, size_t size)
{
char *s = NULL;
int use_randfile = 1;
#ifdef __OpenBSD__
struct stat sb;
#endif
#if defined(_WIN32) && defined(CP_UTF8)
DWORD len;
WCHAR *var, *val;
if ((var = L"RANDFILE",
len = GetEnvironmentVariableW(var, NULL, 0)) == 0
&& (var = L"HOME", use_randfile = 0,
len = GetEnvironmentVariableW(var, NULL, 0)) == 0
&& (var = L"USERPROFILE",
len = GetEnvironmentVariableW(var, NULL, 0)) == 0) {
var = L"SYSTEMROOT",
len = GetEnvironmentVariableW(var, NULL, 0);
}
if (len != 0) {
int sz;
val = _alloca(len * sizeof(WCHAR));
if (GetEnvironmentVariableW(var, val, len) < len
&& (sz = WideCharToMultiByte(CP_UTF8, 0, val, -1, NULL, 0,
NULL, NULL)) != 0) {
s = _alloca(sz);
if (WideCharToMultiByte(CP_UTF8, 0, val, -1, s, sz,
NULL, NULL) == 0)
s = NULL;
}
}
#else
if (OPENSSL_issetugid() != 0) {
use_randfile = 0;
} else {
if (OPENSSL_issetugid() == 0)
s = getenv("RANDFILE");
if (s == NULL || *s == '\0') {
use_randfile = 0;
s = getenv("HOME");
}
}
#endif
#ifdef DEFAULT_HOME
if (!use_randfile && s == NULL) {
s = DEFAULT_HOME;
}
#endif
if (s != NULL && *s) {
size_t len = strlen(s);
if (use_randfile && len + 1 < size) {
if (OPENSSL_strlcpy(buf, s, size) >= size)
return NULL;
} else if (len + strlen(RFILE) + 2 < size) {
OPENSSL_strlcpy(buf, s, size);
#ifndef OPENSSL_SYS_VMS
OPENSSL_strlcat(buf, "/", size);
#endif
OPENSSL_strlcat(buf, RFILE, size);
}
if (s != NULL && *s && strlen(s) + 1 < size) {
if (BUF_strlcpy(buf, s, size) >= size)
return NULL;
} else {
buf[0] = '\0'; /* no file name */
if (OPENSSL_issetugid() == 0)
s = getenv("HOME");
#ifdef DEFAULT_HOME
if (s == NULL) {
s = DEFAULT_HOME;
}
#endif
if (s && *s && strlen(s) + strlen(RFILE) + 2 < size) {
BUF_strlcpy(buf, s, size);
#ifndef OPENSSL_SYS_VMS
BUF_strlcat(buf, "/", size);
#endif
BUF_strlcat(buf, RFILE, size);
} else
buf[0] = '\0'; /* no file name */
}
#ifdef __OpenBSD__
@@ -357,10 +359,14 @@ const char *RAND_file_name(char *buf, size_t size)
* available.
*/
if (!buf[0] || stat(buf, &sb) == -1)
if (OPENSSL_strlcpy(buf, "/dev/arandom", size) >= size) {
return NULL;
if (!buf[0])
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);
}
#endif
return buf[0] ? buf : NULL;
return (buf);
}