1 /* crypto/rand/rand_egd.c */
2 /* Written by Ulf Moeller for the OpenSSL project. */
3 /* ====================================================================
4 * Copyright (c) 1998-2000 The OpenSSL Project. All rights reserved.
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in
15 * the documentation and/or other materials provided with the
18 * 3. All advertising materials mentioning features or use of this
19 * software must display the following acknowledgment:
20 * "This product includes software developed by the OpenSSL Project
21 * for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
23 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
24 * endorse or promote products derived from this software without
25 * prior written permission. For written permission, please contact
26 * openssl-core@openssl.org.
28 * 5. Products derived from this software may not be called "OpenSSL"
29 * nor may "OpenSSL" appear in their names without prior written
30 * permission of the OpenSSL Project.
32 * 6. Redistributions of any form whatsoever must retain the following
34 * "This product includes software developed by the OpenSSL Project
35 * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
37 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
38 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
39 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
40 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
41 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
42 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
43 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
44 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
45 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
46 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
47 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
48 * OF THE POSSIBILITY OF SUCH DAMAGE.
49 * ====================================================================
51 * This product includes cryptographic software written by Eric Young
52 * (eay@cryptsoft.com). This product includes software written by Tim
53 * Hudson (tjh@cryptsoft.com).
57 #include <openssl/rand.h>
59 /* Query the EGD <URL: http://www.lothar.com/tech/crypto/>.
62 #if defined(WIN32) || defined(VMS) || defined(__VMS)
63 int RAND_egd(const char *path)
68 #include <openssl/opensslconf.h>
69 #include OPENSSL_UNISTD
70 #include <sys/types.h>
71 #include <sys/socket.h>
76 # define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER)
79 int RAND_egd(const char *path)
82 struct sockaddr_un addr;
85 unsigned char buf[256];
87 memset(&addr, 0, sizeof(addr));
88 addr.sun_family = AF_UNIX;
89 if (strlen(path) > sizeof(addr.sun_path))
91 strcpy(addr.sun_path,path);
92 len = offsetof(struct sockaddr_un, sun_path) + strlen(path);
93 fd = socket(AF_UNIX, SOCK_STREAM, 0);
94 if (fd == -1) return (-1);
95 if (connect(fd, (struct sockaddr *)&addr, len) == -1) goto err;
99 if (read(fd, buf, 1) != 1) goto err;
100 if (buf[0] == 0) goto err;
101 num = read(fd, buf, 255);
102 if (num < 1) goto err;
104 if (RAND_status() == 1)
107 if (fd != -1) close(fd);