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4ec2d4d2 UM |
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. | |
5 | * | |
6 | * Redistribution and use in source and binary forms, with or without | |
7 | * modification, are permitted provided that the following conditions | |
8 | * are met: | |
9 | * | |
10 | * 1. Redistributions of source code must retain the above copyright | |
11 | * notice, this list of conditions and the following disclaimer. | |
12 | * | |
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 | |
16 | * distribution. | |
17 | * | |
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/)" | |
22 | * | |
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. | |
27 | * | |
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. | |
31 | * | |
32 | * 6. Redistributions of any form whatsoever must retain the following | |
33 | * acknowledgment: | |
34 | * "This product includes software developed by the OpenSSL Project | |
35 | * for use in the OpenSSL Toolkit (http://www.openssl.org/)" | |
36 | * | |
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 | * ==================================================================== | |
50 | * | |
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). | |
54 | * | |
55 | */ | |
56 | ||
57 | #include <openssl/rand.h> | |
58 | ||
59 | /* Query the EGD <URL: http://www.lothar.com/tech/crypto/>. | |
60 | */ | |
61 | ||
7c0dc41c | 62 | #if defined(WIN32) || defined(VMS) || defined(__VMS) |
4ec2d4d2 UM |
63 | int RAND_egd(const char *path) |
64 | { | |
65 | return(-1); | |
66 | } | |
67 | #else | |
68 | #include <openssl/opensslconf.h> | |
69 | #include OPENSSL_UNISTD | |
70 | #include <sys/types.h> | |
71 | #include <sys/socket.h> | |
72 | #include <sys/un.h> | |
fd74679a | 73 | #include <string.h> |
4ec2d4d2 UM |
74 | |
75 | #ifndef offsetof | |
76 | # define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER) | |
77 | #endif | |
78 | ||
79 | int RAND_egd(const char *path) | |
80 | { | |
81 | int ret = -1; | |
82 | struct sockaddr_un addr; | |
83 | int len, num; | |
84 | int fd = -1; | |
85 | unsigned char buf[256]; | |
86 | ||
87 | memset(&addr, 0, sizeof(addr)); | |
88 | addr.sun_family = AF_UNIX; | |
89 | if (strlen(path) > sizeof(addr.sun_path)) | |
90 | return (-1); | |
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); | |
8d5b4ee1 | 95 | if (connect(fd, (struct sockaddr *)&addr, len) == -1) goto err; |
4ec2d4d2 UM |
96 | buf[0] = 1; |
97 | buf[1] = 255; | |
98 | write(fd, buf, 2); | |
99 | if (read(fd, buf, 1) != 1) goto err; | |
e64dceab | 100 | if (buf[0] == 0) goto err; |
4ec2d4d2 UM |
101 | num = read(fd, buf, 255); |
102 | if (num < 1) goto err; | |
103 | RAND_seed(buf, num); | |
104 | if (RAND_status() == 1) | |
105 | ret = num; | |
106 | err: | |
107 | if (fd != -1) close(fd); | |
108 | return(ret); | |
109 | } | |
110 | #endif |