You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
293 lines
9.3 KiB
293 lines
9.3 KiB
4 years ago
|
/* crypto/rand/rand_egd.c */
|
||
|
|
/* Written by Ulf Moeller and Lutz Jaenicke for the OpenSSL project. */
|
||
|
|
/* ====================================================================
|
||
|
|
* Copyright (c) 1998-2000 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/e_os2.h>
|
||
|
|
#include <openssl/rand.h>
|
||
|
|
#include <openssl/buffer.h>
|
||
|
|
|
||
|
|
/*-
|
||
|
|
* Query the EGD <URL: http://www.lothar.com/tech/crypto/>.
|
||
|
|
*
|
||
|
|
* This module supplies three routines:
|
||
|
|
*
|
||
|
|
* RAND_query_egd_bytes(path, buf, bytes)
|
||
|
|
* will actually query "bytes" bytes of entropy form the egd-socket located
|
||
|
|
* at path and will write them to buf (if supplied) or will directly feed
|
||
|
|
* it to RAND_seed() if buf==NULL.
|
||
|
|
* The number of bytes is not limited by the maximum chunk size of EGD,
|
||
|
|
* which is 255 bytes. If more than 255 bytes are wanted, several chunks
|
||
|
|
* of entropy bytes are requested. The connection is left open until the
|
||
|
|
* query is competed.
|
||
|
|
* RAND_query_egd_bytes() returns with
|
||
|
|
* -1 if an error occured during connection or communication.
|
||
|
|
* num the number of bytes read from the EGD socket. This number is either
|
||
|
|
* the number of bytes requested or smaller, if the EGD pool is
|
||
|
|
* drained and the daemon signals that the pool is empty.
|
||
|
|
* This routine does not touch any RAND_status(). This is necessary, since
|
||
|
|
* PRNG functions may call it during initialization.
|
||
|
|
*
|
||
|
|
* RAND_egd_bytes(path, bytes) will query "bytes" bytes and have them
|
||
|
|
* used to seed the PRNG.
|
||
|
|
* RAND_egd_bytes() is a wrapper for RAND_query_egd_bytes() with buf=NULL.
|
||
|
|
* Unlike RAND_query_egd_bytes(), RAND_status() is used to test the
|
||
|
|
* seed status so that the return value can reflect the seed state:
|
||
|
|
* -1 if an error occured during connection or communication _or_
|
||
|
|
* if the PRNG has still not received the required seeding.
|
||
|
|
* num the number of bytes read from the EGD socket. This number is either
|
||
|
|
* the number of bytes requested or smaller, if the EGD pool is
|
||
|
|
* drained and the daemon signals that the pool is empty.
|
||
|
|
*
|
||
|
|
* RAND_egd(path) will query 255 bytes and use the bytes retreived to seed
|
||
|
|
* the PRNG.
|
||
|
|
* RAND_egd() is a wrapper for RAND_egd_bytes() with numbytes=255.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#if defined(OPENSSL_SYS_WIN32) || defined(OPENSSL_SYS_VMS) || defined(OPENSSL_SYS_MSDOS) || defined(OPENSSL_SYS_VXWORKS) || defined(OPENSSL_SYS_NETWARE) || defined(OPENSSL_SYS_VOS) || defined(OPENSSL_SYS_BEOS)
|
||
|
|
int RAND_query_egd_bytes(const char *path, unsigned char *buf, int bytes)
|
||
|
|
{
|
||
|
|
return (-1);
|
||
|
|
}
|
||
|
|
|
||
|
|
int RAND_egd(const char *path)
|
||
|
|
{
|
||
|
|
return (-1);
|
||
|
|
}
|
||
|
|
|
||
|
|
int RAND_egd_bytes(const char *path, int bytes)
|
||
|
|
{
|
||
|
|
return (-1);
|
||
|
|
}
|
||
|
|
#else
|
||
|
|
# include <openssl/opensslconf.h>
|
||
|
|
# include OPENSSL_UNISTD
|
||
|
|
# include <stddef.h>
|
||
|
|
# include <sys/types.h>
|
||
|
|
# include <sys/socket.h>
|
||
|
|
# ifndef NO_SYS_UN_H
|
||
|
|
# ifdef OPENSSL_SYS_VXWORKS
|
||
|
|
# include <streams/un.h>
|
||
|
|
# else
|
||
|
|
# include <sys/un.h>
|
||
|
|
# endif
|
||
|
|
# else
|
||
|
|
struct sockaddr_un {
|
||
|
|
short sun_family; /* AF_UNIX */
|
||
|
|
char sun_path[108]; /* path name (gag) */
|
||
|
|
};
|
||
|
|
# endif /* NO_SYS_UN_H */
|
||
|
|
# include <string.h>
|
||
|
|
# include <errno.h>
|
||
|
|
|
||
|
|
# ifndef offsetof
|
||
|
|
# define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER)
|
||
|
|
# endif
|
||
|
|
|
||
|
|
int RAND_query_egd_bytes(const char *path, unsigned char *buf, int bytes)
|
||
|
|
{
|
||
|
|
int ret = 0;
|
||
|
|
struct sockaddr_un addr;
|
||
|
|
int len, num, numbytes;
|
||
|
|
int fd = -1;
|
||
|
|
int success;
|
||
|
|
unsigned char egdbuf[2], tempbuf[255], *retrievebuf;
|
||
|
|
|
||
|
|
memset(&addr, 0, sizeof(addr));
|
||
|
|
addr.sun_family = AF_UNIX;
|
||
|
|
if (strlen(path) >= sizeof(addr.sun_path))
|
||
|
|
return (-1);
|
||
|
|
BUF_strlcpy(addr.sun_path, path, sizeof addr.sun_path);
|
||
|
|
len = offsetof(struct sockaddr_un, sun_path) + strlen(path);
|
||
|
|
fd = socket(AF_UNIX, SOCK_STREAM, 0);
|
||
|
|
if (fd == -1)
|
||
|
|
return (-1);
|
||
|
|
success = 0;
|
||
|
|
while (!success) {
|
||
|
|
if (connect(fd, (struct sockaddr *)&addr, len) == 0)
|
||
|
|
success = 1;
|
||
|
|
else {
|
||
|
|
switch (errno) {
|
||
|
|
# ifdef EINTR
|
||
|
|
case EINTR:
|
||
|
|
# endif
|
||
|
|
# ifdef EAGAIN
|
||
|
|
case EAGAIN:
|
||
|
|
# endif
|
||
|
|
# ifdef EINPROGRESS
|
||
|
|
case EINPROGRESS:
|
||
|
|
# endif
|
||
|
|
# ifdef EALREADY
|
||
|
|
case EALREADY:
|
||
|
|
# endif
|
||
|
|
/* No error, try again */
|
||
|
|
break;
|
||
|
|
# ifdef EISCONN
|
||
|
|
case EISCONN:
|
||
|
|
success = 1;
|
||
|
|
break;
|
||
|
|
# endif
|
||
|
|
default:
|
||
|
|
goto err; /* failure */
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
while (bytes > 0) {
|
||
|
|
egdbuf[0] = 1;
|
||
|
|
egdbuf[1] = bytes < 255 ? bytes : 255;
|
||
|
|
numbytes = 0;
|
||
|
|
while (numbytes != 2) {
|
||
|
|
num = write(fd, egdbuf + numbytes, 2 - numbytes);
|
||
|
|
if (num >= 0)
|
||
|
|
numbytes += num;
|
||
|
|
else {
|
||
|
|
switch (errno) {
|
||
|
|
# ifdef EINTR
|
||
|
|
case EINTR:
|
||
|
|
# endif
|
||
|
|
# ifdef EAGAIN
|
||
|
|
case EAGAIN:
|
||
|
|
# endif
|
||
|
|
/* No error, try again */
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
ret = -1;
|
||
|
|
goto err; /* failure */
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
numbytes = 0;
|
||
|
|
while (numbytes != 1) {
|
||
|
|
num = read(fd, egdbuf, 1);
|
||
|
|
if (num == 0)
|
||
|
|
goto err; /* descriptor closed */
|
||
|
|
else if (num > 0)
|
||
|
|
numbytes += num;
|
||
|
|
else {
|
||
|
|
switch (errno) {
|
||
|
|
# ifdef EINTR
|
||
|
|
case EINTR:
|
||
|
|
# endif
|
||
|
|
# ifdef EAGAIN
|
||
|
|
case EAGAIN:
|
||
|
|
# endif
|
||
|
|
/* No error, try again */
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
ret = -1;
|
||
|
|
goto err; /* failure */
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if (egdbuf[0] == 0)
|
||
|
|
goto err;
|
||
|
|
if (buf)
|
||
|
|
retrievebuf = buf + ret;
|
||
|
|
else
|
||
|
|
retrievebuf = tempbuf;
|
||
|
|
numbytes = 0;
|
||
|
|
while (numbytes != egdbuf[0]) {
|
||
|
|
num = read(fd, retrievebuf + numbytes, egdbuf[0] - numbytes);
|
||
|
|
if (num == 0)
|
||
|
|
goto err; /* descriptor closed */
|
||
|
|
else if (num > 0)
|
||
|
|
numbytes += num;
|
||
|
|
else {
|
||
|
|
switch (errno) {
|
||
|
|
# ifdef EINTR
|
||
|
|
case EINTR:
|
||
|
|
# endif
|
||
|
|
# ifdef EAGAIN
|
||
|
|
case EAGAIN:
|
||
|
|
# endif
|
||
|
|
/* No error, try again */
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
ret = -1;
|
||
|
|
goto err; /* failure */
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
ret += egdbuf[0];
|
||
|
|
bytes -= egdbuf[0];
|
||
|
|
if (!buf)
|
||
|
|
RAND_seed(tempbuf, egdbuf[0]);
|
||
|
|
}
|
||
|
|
err:
|
||
|
|
if (fd != -1)
|
||
|
|
close(fd);
|
||
|
|
return (ret);
|
||
|
|
}
|
||
|
|
|
||
|
|
int RAND_egd_bytes(const char *path, int bytes)
|
||
|
|
{
|
||
|
|
int num, ret = 0;
|
||
|
|
|
||
|
|
num = RAND_query_egd_bytes(path, NULL, bytes);
|
||
|
|
if (num < 1)
|
||
|
|
goto err;
|
||
|
|
if (RAND_status() == 1)
|
||
|
|
ret = num;
|
||
|
|
err:
|
||
|
|
return (ret);
|
||
|
|
}
|
||
|
|
|
||
|
|
int RAND_egd(const char *path)
|
||
|
|
{
|
||
|
|
return (RAND_egd_bytes(path, 255));
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif
|