--- /dev/null
+/* 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.]
+ */
+
+/* We need to define this to get macros like S_IFBLK and S_IFCHR */
+#define _XOPEN_SOURCE 1
+
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "e_os.h"
+#include <openssl/crypto.h>
+#include <openssl/rand.h>
+#include <openssl/buffer.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;
+#if defined(S_IFBLK) && defined(S_IFCHR)
+ if (sb.st_mode & (S_IFBLK | S_IFCHR)) {
+ /* this file is a device. we don't want read an infinite number
+ * of bytes from a random device, nor do we want to use buffered
+ * I/O because we will waste system entropy.
+ */
+ bytes = (bytes == -1) ? 2048 : bytes; /* ok, is 2048 enough? */
+ setvbuf(in, NULL, _IONBF, 0); /* don't do buffered reads */
+ }
+#endif
+ 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;
+ struct stat sb;
+
+ i=stat(file,&sb);
+ if (i != -1) {
+#if defined(S_IFBLK) && defined(S_IFCHR)
+ if (sb.st_mode & (S_IFBLK | S_IFCHR)) {
+ /* this file is a device. we don't write back to it.
+ * we "succeed" on the assumption this is some sort
+ * of random device. Otherwise attempting to write to
+ * and chmod the device causes problems.
+ */
+ return(1);
+ }
+#endif
+ }
+
+#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;
+ int ok = 0;
+#ifdef __OpenBSD__
+ struct stat sb;
+#endif
+
+ if (OPENSSL_issetugid() == 0)
+ s=getenv("RANDFILE");
+ if (s != NULL && *s && strlen(s) + 1 < size)
+ {
+ if (BUF_strlcpy(buf,s,size) >= size)
+ return NULL;
+ }
+ else
+ {
+ if (OPENSSL_issetugid() == 0)
+ s=getenv("HOME");
+#ifdef DEFAULT_HOME
+ if (s == NULL)
+ {
+ s = DEFAULT_HOME;
+ }
+#endif
+ if (s && *s && strlen(s)+strlen(RFILE)+2 < size)
+ {
+ BUF_strlcpy(buf,s,size);
+#ifndef OPENSSL_SYS_VMS
+ BUF_strlcat(buf,"/",size);
+#endif
+ BUF_strlcat(buf,RFILE,size);
+ ok = 1;
+ }
+ else
+ buf[0] = '\0'; /* no file name */
+ }
+
+#ifdef __OpenBSD__
+ /* given that all random loads just fail if the file can't be
+ * seen on a stat, we stat the file we're returning, if it
+ * fails, use /dev/arandom instead. this allows the user to
+ * use their own source for good random data, but defaults
+ * to something hopefully decent if that isn't available.
+ */
+
+ if (!ok)
+ if (BUF_strlcpy(buf,"/dev/arandom",size) >= size) {
+ return(NULL);
+ }
+ if (stat(buf,&sb) == -1)
+ if (BUF_strlcpy(buf,"/dev/arandom",size) >= size) {
+ return(NULL);
+ }
+
+#endif
+ return(buf);
+ }
projects / bcm963xx.git / blobdiff