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- /* crypto/rand/randfile.c */
- /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
- * All rights reserved.
- *
- * This package is an SSL implementation written
- * by Eric Young (eay@cryptsoft.com).
- * The implementation was written so as to conform with Netscapes SSL.
- *
- * This library is free for commercial and non-commercial use as long as
- * the following conditions are aheared to. The following conditions
- * apply to all code found in this distribution, be it the RC4, RSA,
- * lhash, DES, etc., code; not just the SSL code. The SSL documentation
- * included with this distribution is covered by the same copyright terms
- * except that the holder is Tim Hudson (tjh@cryptsoft.com).
- *
- * Copyright remains Eric Young's, and as such any Copyright notices in
- * the code are not to be removed.
- * If this package is used in a product, Eric Young should be given attribution
- * as the author of the parts of the library used.
- * This can be in the form of a textual message at program startup or
- * in documentation (online or textual) provided with the package.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * "This product includes cryptographic software written by
- * Eric Young (eay@cryptsoft.com)"
- * The word 'cryptographic' can be left out if the rouines from the library
- * being used are not cryptographic related :-).
- * 4. If you include any Windows specific code (or a derivative thereof) from
- * the apps directory (application code) you must include an acknowledgement:
- * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
- *
- * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- * The licence and distribution terms for any publically available version or
- * derivative of this code cannot be changed. i.e. this code cannot simply be
- * copied and put under another distribution licence
- * [including the GNU Public Licence.]
- */
- #include <errno.h>
- #include <stdio.h>
- #include <stdlib.h>
- #include <string.h>
- #include "e_os.h"
- #include <openssl/crypto.h>
- #include <openssl/rand.h>
- #ifdef OPENSSL_SYS_VMS
- #include <unixio.h>
- #endif
- #ifndef NO_SYS_TYPES_H
- # include <sys/types.h>
- #endif
- #ifdef MAC_OS_pre_X
- # include <stat.h>
- #else
- # include <sys/stat.h>
- #endif
- #undef BUFSIZE
- #define BUFSIZE 1024
- #define RAND_DATA 1024
- /* #define RFILE ".rnd" - defined in ../../e_os.h */
- /* Note that these functions are intended for seed files only.
- * Entropy devices and EGD sockets are handled in rand_unix.c */
- int RAND_load_file(const char *file, long bytes)
- {
- /* If bytes >= 0, read up to 'bytes' bytes.
- * if bytes == -1, read complete file. */
- MS_STATIC unsigned char buf[BUFSIZE];
- struct stat sb;
- int i,ret=0,n;
- FILE *in;
- if (file == NULL) return(0);
- i=stat(file,&sb);
- /* If the state fails, put some crap in anyway */
- RAND_add(&sb,sizeof(sb),0);
- if (i < 0) return(0);
- if (bytes == 0) return(ret);
- in=fopen(file,"rb");
- if (in == NULL) goto err;
- for (;;)
- {
- if (bytes > 0)
- n = (bytes < BUFSIZE)?(int)bytes:BUFSIZE;
- else
- n = BUFSIZE;
- i=fread(buf,1,n,in);
- if (i <= 0) break;
- /* even if n != i, use the full array */
- RAND_add(buf,n,i);
- ret+=i;
- if (bytes > 0)
- {
- bytes-=n;
- if (bytes <= 0) break;
- }
- }
- fclose(in);
- OPENSSL_cleanse(buf,BUFSIZE);
- err:
- return(ret);
- }
- int RAND_write_file(const char *file)
- {
- unsigned char buf[BUFSIZE];
- int i,ret=0,rand_err=0;
- FILE *out = NULL;
- int n;
-
- #if defined(O_CREAT) && !defined(OPENSSL_SYS_WIN32)
- /* For some reason Win32 can't write to files created this way */
-
- /* chmod(..., 0600) is too late to protect the file,
- * permissions should be restrictive from the start */
- int fd = open(file, O_CREAT, 0600);
- if (fd != -1)
- out = fdopen(fd, "wb");
- #endif
- if (out == NULL)
- out = fopen(file,"wb");
- if (out == NULL) goto err;
- #ifndef NO_CHMOD
- chmod(file,0600);
- #endif
- n=RAND_DATA;
- for (;;)
- {
- i=(n > BUFSIZE)?BUFSIZE:n;
- n-=BUFSIZE;
- if (RAND_bytes(buf,i) <= 0)
- rand_err=1;
- i=fwrite(buf,1,i,out);
- if (i <= 0)
- {
- ret=0;
- break;
- }
- ret+=i;
- if (n <= 0) break;
- }
- #ifdef OPENSSL_SYS_VMS
- /* Try to delete older versions of the file, until there aren't
- any */
- {
- char *tmpf;
- tmpf = OPENSSL_malloc(strlen(file) + 4); /* to add ";-1" and a nul */
- if (tmpf)
- {
- strcpy(tmpf, file);
- strcat(tmpf, ";-1");
- while(delete(tmpf) == 0)
- ;
- rename(file,";1"); /* Make sure it's version 1, or we
- will reach the limit (32767) at
- some point... */
- }
- }
- #endif /* OPENSSL_SYS_VMS */
- fclose(out);
- OPENSSL_cleanse(buf,BUFSIZE);
- err:
- return (rand_err ? -1 : ret);
- }
- const char *RAND_file_name(char *buf, size_t size)
- {
- char *s=NULL;
- char *ret=NULL;
- if (OPENSSL_issetugid() == 0)
- s=getenv("RANDFILE");
- if (s != NULL)
- {
- if(strlen(s) >= size)
- return NULL;
- strcpy(buf,s);
- ret=buf;
- }
- else
- {
- if (OPENSSL_issetugid() == 0)
- s=getenv("HOME");
- #ifdef DEFAULT_HOME
- if (s == NULL)
- {
- s = DEFAULT_HOME;
- }
- #endif
- if (s != NULL && (strlen(s)+strlen(RFILE)+2 < size))
- {
- strcpy(buf,s);
- #ifndef OPENSSL_SYS_VMS
- strcat(buf,"/");
- #endif
- strcat(buf,RFILE);
- ret=buf;
- }
- else
- buf[0] = '\0'; /* no file name */
- }
- return(ret);
- }
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