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640588bb
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前往新版Gitcode,体验更适合开发者的 AI 搜索 >>
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640588bb
编写于
10月 26, 1999
作者:
B
Bodo Möller
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差异文件
New file app_rand.c with some functionality used in various openssl
applications.
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a31011e8
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apps/app_rand.c
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640588bb
/* apps/app_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.]
*/
/* ====================================================================
* Copyright (c) 1998-1999 The OpenSSL Project. All rights reserved.
*
* 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 above 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 acknowledgment:
* "This product includes software developed by the OpenSSL Project
* for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
*
* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
* endorse or promote products derived from this software without
* prior written permission. For written permission, please contact
* openssl-core@openssl.org.
*
* 5. Products derived from this software may not be called "OpenSSL"
* nor may "OpenSSL" appear in their names without prior written
* permission of the OpenSSL Project.
*
* 6. Redistributions of any form whatsoever must retain the following
* acknowledgment:
* "This product includes software developed by the OpenSSL Project
* for use in the OpenSSL Toolkit (http://www.openssl.org/)"
*
* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
* EXPRESSED 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 OpenSSL PROJECT OR
* ITS 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.
* ====================================================================
*
* This product includes cryptographic software written by Eric Young
* (eay@cryptsoft.com). This product includes software written by Tim
* Hudson (tjh@cryptsoft.com).
*
*/
#include <openssl/bio.h>
#include <openssl/rand.h>
#include "apps.h"
static
int
seeded
=
0
;
int
app_RAND_load_file
(
const
char
*
file
,
BIO
*
bio_e
,
int
dont_warn
)
{
int
consider_randfile
=
(
file
==
NULL
);
char
buffer
[
200
];
#ifdef WINDOWS
BIO_printf
(
bio_e
,
"Loading 'screen' into random state -"
);
BIO_flush
(
bio_e
);
RAND_screen
();
BIO_printf
(
bio_e
,
" done
\n
"
);
#endif
if
(
file
==
NULL
)
file
=
RAND_file_name
(
buffer
,
sizeof
buffer
);
if
(
file
==
NULL
||
!
RAND_load_file
(
file
,
1024L
*
1024L
))
{
if
(
!
dont_warn
)
{
BIO_printf
(
bio_e
,
"unable to load 'random state'
\n
"
);
BIO_printf
(
bio_e
,
"What this means is that the random number generator has not been seeded
\n
"
);
BIO_printf
(
bio_e
,
"with much random data.
\n
"
);
if
(
consider_randfile
)
/* explanation does not apply when a file is explicitly named */
{
BIO_printf
(
bio_e
,
"Consider setting the RANDFILE environment variable to point at a file that
\n
"
);
BIO_printf
(
bio_e
,
"'random' data can be kept in.
\n
"
);
}
}
return
0
;
}
seeded
=
1
;
return
1
;
}
long
app_RAND_load_files
(
char
*
name
)
{
char
*
p
,
*
n
;
int
last
;
long
tot
=
0
;
for
(;;)
{
last
=
0
;
for
(
p
=
name
;
((
*
p
!=
'\0'
)
&&
(
*
p
!=
LIST_SEPARATOR_CHAR
));
p
++
);
if
(
*
p
==
'\0'
)
last
=
1
;
*
p
=
'\0'
;
n
=
name
;
name
=
p
+
1
;
if
(
*
n
==
'\0'
)
break
;
tot
+=
RAND_load_file
(
n
,
1024L
*
1024L
);
if
(
last
)
break
;
}
if
(
tot
>
512
)
app_RAND_allow_write_file
();
return
(
tot
);
}
int
app_RAND_write_file
(
const
char
*
file
,
BIO
*
bio_e
)
{
char
buffer
[
200
];
if
(
!
seeded
)
/* If we did not manage to read the seed file,
* we should not write a low-entropy seed file back --
* it would supress a crucial warning the next time
* we want to use it. */
return
0
;
if
(
file
==
NULL
)
file
=
RAND_file_name
(
buffer
,
sizeof
buffer
);
if
(
file
==
NULL
||
!
RAND_write_file
(
file
))
{
BIO_printf
(
bio_e
,
"unable to write 'random state'
\n
"
);
return
0
;
}
return
1
;
}
void
app_RAND_allow_write_file
(
void
)
{
seeded
=
1
;
}
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