1 /* crypto/rand/randfile.c */
2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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.
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).
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.
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
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)"
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
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.]
63 #include <sys/types.h>
65 #include <sys/types.h>
73 #include <openssl/rand.h>
77 #define RAND_DATA 1024
79 /* #define RFILE ".rand" - defined in ../../e_os.h */
81 int RAND_load_file(const char *file, long bytes)
83 MS_STATIC unsigned char buf[BUFSIZE];
88 if (file == NULL) return(0);
91 /* If the state fails, put some crap in anyway */
92 RAND_seed(&sb,sizeof(sb));
95 if (bytes <= 0) return(ret);
98 if (in == NULL) goto err;
101 n=(bytes < BUFSIZE)?(int)bytes:BUFSIZE;
104 /* even if n != i, use the full array */
108 if (bytes <= 0) break;
111 memset(buf,0,BUFSIZE);
116 int RAND_write_file(const char *file)
118 unsigned char buf[BUFSIZE];
123 /* Under VMS, fopen(file, "wb") will craete a new version of the
124 same file. This is not good, so let's try updating an existing
125 one, and create file only if it doesn't already exist. This
126 should be completely harmless on system that have no file
127 versions. -- Richard Levitte */
128 out=fopen(file,"rb+");
129 if (out == NULL && errno == ENOENT)
132 out=fopen(file,"wb");
134 if (out == NULL) goto err;
139 i=(n > BUFSIZE)?BUFSIZE:n;
142 i=fwrite(buf,1,i,out);
152 memset(buf,0,BUFSIZE);
157 char *RAND_file_name(char *buf, int size)
162 s=getenv("RANDFILE");
165 strncpy(buf,s,size-1);
172 if (s == NULL) return(RFILE);
173 if (((int)(strlen(s)+strlen(RFILE)+2)) > size)