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1 : : /* apps/app_rand.c */
2 : : /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3 : : * All rights reserved.
4 : : *
5 : : * This package is an SSL implementation written
6 : : * by Eric Young (eay@cryptsoft.com).
7 : : * The implementation was written so as to conform with Netscapes SSL.
8 : : *
9 : : * This library is free for commercial and non-commercial use as long as
10 : : * the following conditions are aheared to. The following conditions
11 : : * apply to all code found in this distribution, be it the RC4, RSA,
12 : : * lhash, DES, etc., code; not just the SSL code. The SSL documentation
13 : : * included with this distribution is covered by the same copyright terms
14 : : * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15 : : *
16 : : * Copyright remains Eric Young's, and as such any Copyright notices in
17 : : * the code are not to be removed.
18 : : * If this package is used in a product, Eric Young should be given attribution
19 : : * as the author of the parts of the library used.
20 : : * This can be in the form of a textual message at program startup or
21 : : * in documentation (online or textual) provided with the package.
22 : : *
23 : : * Redistribution and use in source and binary forms, with or without
24 : : * modification, are permitted provided that the following conditions
25 : : * are met:
26 : : * 1. Redistributions of source code must retain the copyright
27 : : * notice, this list of conditions and the following disclaimer.
28 : : * 2. Redistributions in binary form must reproduce the above copyright
29 : : * notice, this list of conditions and the following disclaimer in the
30 : : * documentation and/or other materials provided with the distribution.
31 : : * 3. All advertising materials mentioning features or use of this software
32 : : * must display the following acknowledgement:
33 : : * "This product includes cryptographic software written by
34 : : * Eric Young (eay@cryptsoft.com)"
35 : : * The word 'cryptographic' can be left out if the rouines from the library
36 : : * being used are not cryptographic related :-).
37 : : * 4. If you include any Windows specific code (or a derivative thereof) from
38 : : * the apps directory (application code) you must include an acknowledgement:
39 : : * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40 : : *
41 : : * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42 : : * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43 : : * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44 : : * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45 : : * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46 : : * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47 : : * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 : : * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49 : : * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50 : : * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51 : : * SUCH DAMAGE.
52 : : *
53 : : * The licence and distribution terms for any publically available version or
54 : : * derivative of this code cannot be changed. i.e. this code cannot simply be
55 : : * copied and put under another distribution licence
56 : : * [including the GNU Public Licence.]
57 : : */
58 : : /* ====================================================================
59 : : * Copyright (c) 1998-2000 The OpenSSL Project. All rights reserved.
60 : : *
61 : : * Redistribution and use in source and binary forms, with or without
62 : : * modification, are permitted provided that the following conditions
63 : : * are met:
64 : : *
65 : : * 1. Redistributions of source code must retain the above copyright
66 : : * notice, this list of conditions and the following disclaimer.
67 : : *
68 : : * 2. Redistributions in binary form must reproduce the above copyright
69 : : * notice, this list of conditions and the following disclaimer in
70 : : * the documentation and/or other materials provided with the
71 : : * distribution.
72 : : *
73 : : * 3. All advertising materials mentioning features or use of this
74 : : * software must display the following acknowledgment:
75 : : * "This product includes software developed by the OpenSSL Project
76 : : * for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
77 : : *
78 : : * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
79 : : * endorse or promote products derived from this software without
80 : : * prior written permission. For written permission, please contact
81 : : * openssl-core@openssl.org.
82 : : *
83 : : * 5. Products derived from this software may not be called "OpenSSL"
84 : : * nor may "OpenSSL" appear in their names without prior written
85 : : * permission of the OpenSSL Project.
86 : : *
87 : : * 6. Redistributions of any form whatsoever must retain the following
88 : : * acknowledgment:
89 : : * "This product includes software developed by the OpenSSL Project
90 : : * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
91 : : *
92 : : * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
93 : : * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
94 : : * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
95 : : * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
96 : : * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
97 : : * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
98 : : * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
99 : : * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
100 : : * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
101 : : * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
102 : : * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
103 : : * OF THE POSSIBILITY OF SUCH DAMAGE.
104 : : * ====================================================================
105 : : *
106 : : * This product includes cryptographic software written by Eric Young
107 : : * (eay@cryptsoft.com). This product includes software written by Tim
108 : : * Hudson (tjh@cryptsoft.com).
109 : : *
110 : : */
111 : :
112 : : #define NON_MAIN
113 : : #include "apps.h"
114 : : #undef NON_MAIN
115 : : #include <openssl/bio.h>
116 : : #include <openssl/rand.h>
117 : :
118 : :
119 : : static int seeded = 0;
120 : : static int egdsocket = 0;
121 : :
122 : 83 : int app_RAND_load_file(const char *file, BIO *bio_e, int dont_warn)
123 : : {
124 : 83 : int consider_randfile = (file == NULL);
125 : : char buffer[200];
126 : :
127 : : #ifdef OPENSSL_SYS_WINDOWS
128 : : BIO_printf(bio_e,"Loading 'screen' into random state -");
129 : : BIO_flush(bio_e);
130 : : RAND_screen();
131 : : BIO_printf(bio_e," done\n");
132 : : #endif
133 : :
134 [ + + ]: 83 : if (file == NULL)
135 : 71 : file = RAND_file_name(buffer, sizeof buffer);
136 [ - + ]: 12 : else if (RAND_egd(file) > 0)
137 : : {
138 : : /* we try if the given filename is an EGD socket.
139 : : if it is, we don't write anything back to the file. */
140 : 0 : egdsocket = 1;
141 : 0 : return 1;
142 : : }
143 [ + - ][ + + ]: 83 : if (file == NULL || !RAND_load_file(file, -1))
144 : : {
145 [ - + ]: 1 : if (RAND_status() == 0)
146 : : {
147 [ # # ]: 0 : if (!dont_warn)
148 : : {
149 : 0 : BIO_printf(bio_e,"unable to load 'random state'\n");
150 : 0 : BIO_printf(bio_e,"This means that the random number generator has not been seeded\n");
151 : 0 : BIO_printf(bio_e,"with much random data.\n");
152 [ # # ]: 0 : if (consider_randfile) /* explanation does not apply when a file is explicitly named */
153 : : {
154 : 0 : BIO_printf(bio_e,"Consider setting the RANDFILE environment variable to point at a file that\n");
155 : 0 : BIO_printf(bio_e,"'random' data can be kept in (the file will be overwritten).\n");
156 : : }
157 : : }
158 : : return 0;
159 : : }
160 : : }
161 : 83 : seeded = 1;
162 : 83 : return 1;
163 : : }
164 : :
165 : 0 : long app_RAND_load_files(char *name)
166 : : {
167 : : char *p,*n;
168 : : int last;
169 : 0 : long tot=0;
170 : : int egd;
171 : :
172 : : for (;;)
173 : : {
174 : 0 : last=0;
175 [ # # ]: 0 : for (p=name; ((*p != '\0') && (*p != LIST_SEPARATOR_CHAR)); p++);
176 [ # # ]: 0 : if (*p == '\0') last=1;
177 : 0 : *p='\0';
178 : 0 : n=name;
179 : 0 : name=p+1;
180 [ # # ]: 0 : if (*n == '\0') break;
181 : :
182 : 0 : egd=RAND_egd(n);
183 [ # # ]: 0 : if (egd > 0)
184 : 0 : tot+=egd;
185 : : else
186 : 0 : tot+=RAND_load_file(n,-1);
187 [ # # ]: 0 : if (last) break;
188 : : }
189 [ # # ]: 0 : if (tot > 512)
190 : 0 : app_RAND_allow_write_file();
191 : 0 : return(tot);
192 : : }
193 : :
194 : 104 : int app_RAND_write_file(const char *file, BIO *bio_e)
195 : : {
196 : : char buffer[200];
197 : :
198 [ + - ][ + + ]: 104 : if (egdsocket || !seeded)
199 : : /* If we did not manage to read the seed file,
200 : : * we should not write a low-entropy seed file back --
201 : : * it would suppress a crucial warning the next time
202 : : * we want to use it. */
203 : : return 0;
204 : :
205 [ + + ]: 83 : if (file == NULL)
206 : 71 : file = RAND_file_name(buffer, sizeof buffer);
207 [ + - ][ - + ]: 83 : if (file == NULL || !RAND_write_file(file))
208 : : {
209 : 0 : BIO_printf(bio_e,"unable to write 'random state'\n");
210 : 0 : return 0;
211 : : }
212 : : return 1;
213 : : }
214 : :
215 : 0 : void app_RAND_allow_write_file(void)
216 : : {
217 : 0 : seeded = 1;
218 : 0 : }
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