1/*
2 * Copyright 2000-2018 The OpenSSL Project Authors. All Rights Reserved.
3 *
4 * Licensed under the Apache License 2.0 (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
8 */
9
10#include <openssl/opensslconf.h>
11#ifdef OPENSSL_NO_EGD
12NON_EMPTY_TRANSLATION_UNIT
13#else
14
15# include <openssl/crypto.h>
16# include <openssl/e_os2.h>
17# include <openssl/rand.h>
18
19/*
20 * Query an EGD
21 */
22
23# if defined(OPENSSL_SYS_WIN32) || defined(OPENSSL_SYS_VMS) || defined(OPENSSL_SYS_MSDOS) || defined(OPENSSL_SYS_VXWORKS) || defined(OPENSSL_SYS_VOS) || defined(OPENSSL_SYS_UEFI)
24int RAND_query_egd_bytes(const char *path, unsigned char *buf, int bytes)
25{
26 return -1;
27}
28
29int RAND_egd(const char *path)
30{
31 return -1;
32}
33
34int RAND_egd_bytes(const char *path, int bytes)
35{
36 return -1;
37}
38
39# else
40
41# include <unistd.h>
42# include <stddef.h>
43# include <sys/types.h>
44# include <sys/socket.h>
45# ifndef NO_SYS_UN_H
46# ifdef OPENSSL_SYS_VXWORKS
47# include <streams/un.h>
48# else
49# include <sys/un.h>
50# endif
51# else
52struct sockaddr_un {
53 short sun_family; /* AF_UNIX */
54 char sun_path[108]; /* path name (gag) */
55};
56# endif /* NO_SYS_UN_H */
57# include <string.h>
58# include <errno.h>
59
60int RAND_query_egd_bytes(const char *path, unsigned char *buf, int bytes)
61{
62 FILE *fp = NULL;
63 struct sockaddr_un addr;
64 int mybuffer, ret = -1, i, numbytes, fd;
65 unsigned char tempbuf[255];
66
67 if (bytes > (int)sizeof(tempbuf))
68 return -1;
69
70 /* Make socket. */
71 memset(&addr, 0, sizeof(addr));
72 addr.sun_family = AF_UNIX;
73 if (strlen(path) >= sizeof(addr.sun_path))
74 return -1;
75 strcpy(addr.sun_path, path);
76 i = offsetof(struct sockaddr_un, sun_path) + strlen(path);
77 fd = socket(AF_UNIX, SOCK_STREAM, 0);
78 if (fd == -1 || (fp = fdopen(fd, "r+")) == NULL)
79 return -1;
80 setbuf(fp, NULL);
81
82 /* Try to connect */
83 for ( ; ; ) {
84 if (connect(fd, (struct sockaddr *)&addr, i) == 0)
85 break;
86# ifdef EISCONN
87 if (errno == EISCONN)
88 break;
89# endif
90 switch (errno) {
91# ifdef EINTR
92 case EINTR:
93# endif
94# ifdef EAGAIN
95 case EAGAIN:
96# endif
97# ifdef EINPROGRESS
98 case EINPROGRESS:
99# endif
100# ifdef EALREADY
101 case EALREADY:
102# endif
103 /* No error, try again */
104 break;
105 default:
106 ret = -1;
107 goto err;
108 }
109 }
110
111 /* Make request, see how many bytes we can get back. */
112 tempbuf[0] = 1;
113 tempbuf[1] = bytes;
114 if (fwrite(tempbuf, sizeof(char), 2, fp) != 2 || fflush(fp) == EOF)
115 goto err;
116 if (fread(tempbuf, sizeof(char), 1, fp) != 1 || tempbuf[0] == 0)
117 goto err;
118 numbytes = tempbuf[0];
119
120 /* Which buffer are we using? */
121 mybuffer = buf == NULL;
122 if (mybuffer)
123 buf = tempbuf;
124
125 /* Read bytes. */
126 i = fread(buf, sizeof(char), numbytes, fp);
127 if (i < numbytes)
128 goto err;
129 ret = numbytes;
130 if (mybuffer)
131 RAND_add(tempbuf, i, i);
132
133 err:
134 if (fp != NULL)
135 fclose(fp);
136 return ret;
137}
138
139int RAND_egd_bytes(const char *path, int bytes)
140{
141 int num;
142
143 num = RAND_query_egd_bytes(path, NULL, bytes);
144 if (num < 0)
145 return -1;
146 if (RAND_status() != 1)
147 return -1;
148 return num;
149}
150
151int RAND_egd(const char *path)
152{
153 return RAND_egd_bytes(path, 255);
154}
155
156# endif
157
158#endif
159