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 |
12 | NON_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) |
24 | int RAND_query_egd_bytes(const char *path, unsigned char *buf, int bytes) |
25 | { |
26 | return -1; |
27 | } |
28 | |
29 | int RAND_egd(const char *path) |
30 | { |
31 | return -1; |
32 | } |
33 | |
34 | int 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 |
52 | struct 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 | |
60 | int 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 | |
139 | int 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 | |
151 | int RAND_egd(const char *path) |
152 | { |
153 | return RAND_egd_bytes(path, 255); |
154 | } |
155 | |
156 | # endif |
157 | |
158 | #endif |
159 | |