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111 lines
3.8 KiB
C
111 lines
3.8 KiB
C
/* crypto/rand/rand_egd.c */
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/* Written by Ulf Moeller for the OpenSSL project. */
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/* ====================================================================
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* Copyright (c) 1998-2000 The OpenSSL Project. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* 3. All advertising materials mentioning features or use of this
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* software must display the following acknowledgment:
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* "This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
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*
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* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
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* endorse or promote products derived from this software without
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* prior written permission. For written permission, please contact
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* openssl-core@openssl.org.
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*
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* 5. Products derived from this software may not be called "OpenSSL"
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* nor may "OpenSSL" appear in their names without prior written
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* permission of the OpenSSL Project.
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*
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* 6. Redistributions of any form whatsoever must retain the following
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* acknowledgment:
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* "This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit (http://www.openssl.org/)"
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*
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* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
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* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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* ====================================================================
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*
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* This product includes cryptographic software written by Eric Young
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* (eay@cryptsoft.com). This product includes software written by Tim
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* Hudson (tjh@cryptsoft.com).
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*
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*/
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#include <openssl/rand.h>
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/* Query the EGD <URL: http://www.lothar.com/tech/crypto/>.
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*/
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#if defined(WIN32) || defined(VMS) || defined(__VMS)
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int RAND_egd(const char *path)
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{
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return(-1);
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}
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#else
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#include <openssl/opensslconf.h>
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#include OPENSSL_UNISTD
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <sys/un.h>
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#include <string.h>
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#ifndef offsetof
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# define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER)
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#endif
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int RAND_egd(const char *path)
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{
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int ret = -1;
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struct sockaddr_un addr;
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int len, num;
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int fd = -1;
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unsigned char buf[256];
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memset(&addr, 0, sizeof(addr));
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addr.sun_family = AF_UNIX;
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if (strlen(path) > sizeof(addr.sun_path))
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return (-1);
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strcpy(addr.sun_path,path);
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len = offsetof(struct sockaddr_un, sun_path) + strlen(path);
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fd = socket(AF_UNIX, SOCK_STREAM, 0);
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if (fd == -1) return (-1);
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if (connect(fd, (struct sockaddr *)&addr, len) == -1) goto err;
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buf[0] = 1;
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buf[1] = 255;
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write(fd, buf, 2);
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if (read(fd, buf, 1) != 1) goto err;
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if (buf[0] == 0) goto err;
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num = read(fd, buf, 255);
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if (num < 1) goto err;
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RAND_seed(buf, num);
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if (RAND_status() == 1)
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ret = num;
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err:
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if (fd != -1) close(fd);
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return(ret);
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}
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#endif
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