Initial import

1 files changed, 326 insertions, 0 deletions

diff --git a/openssl/crypto/rand/randfile.c b/openssl/crypto/rand/randfile.c
new file mode 100644
index 00000000..bc7d9c58
--- /dev/null
+++ b/openssl/crypto/rand/randfile.c
@@ -0,0 +1,326 @@
+/* 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 500
+
+#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
+#ifndef OPENSSL_NO_POSIX_IO
+# include <sys/stat.h>
+#endif
+
+#ifdef _WIN32
+#define stat	_stat
+#define chmod	_chmod
+#define open	_open
+#define fdopen	_fdopen
+#endif
+
+#undef BUFSIZE
+#define BUFSIZE	1024
+#define RAND_DATA 1024
+
+#ifdef OPENSSL_SYS_VMS
+/* This declaration is a nasty hack to get around vms' extension to fopen
+ * for passing in sharing options being disabled by our /STANDARD=ANSI89 */
+static FILE *(*const vms_fopen)(const char *, const char *, ...) =
+    (FILE *(*)(const char *, const char *, ...))fopen;
+#define VMS_OPEN_ATTRS "shr=get,put,upd,del","ctx=bin,stm","rfm=stm","rat=none","mrs=0"
+#endif
+
+/* #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];
+#ifndef OPENSSL_NO_POSIX_IO
+	struct stat sb;
+#endif
+	int i,ret=0,n;
+	FILE *in;
+
+	if (file == NULL) return(0);
+
+#ifndef OPENSSL_NO_POSIX_IO
+#ifdef PURIFY
+	/* struct stat can have padding and unused fields that may not be
+	 * initialized in the call to stat(). We need to clear the entire
+	 * structure before calling RAND_add() to avoid complaints from
+	 * applications such as Valgrind.
+	 */
+	memset(&sb, 0, sizeof(sb));
+#endif
+	if (stat(file,&sb) < 0) return(0);
+	RAND_add(&sb,sizeof(sb),0.0);
+#endif
+	if (bytes == 0) return(ret);
+
+#ifdef OPENSSL_SYS_VMS
+	in=vms_fopen(file,"rb",VMS_OPEN_ATTRS);
+#else
+	in=fopen(file,"rb");
+#endif
+	if (in == NULL) goto err;
+#if defined(S_IFBLK) && defined(S_IFCHR) && !defined(OPNESSL_NO_POSIX_IO)
+	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? */
+#ifndef OPENSSL_NO_SETVBUF_IONBF
+	  setvbuf(in, NULL, _IONBF, 0); /* don't do buffered reads */
+#endif /* ndef OPENSSL_NO_SETVBUF_IONBF */
+	}
+#endif
+	for (;;)
+		{
+		if (bytes > 0)
+			n = (bytes < BUFSIZE)?(int)bytes:BUFSIZE;
+		else
+			n = BUFSIZE;
+		i=fread(buf,1,n,in);
+		if (i <= 0) break;
+#ifdef PURIFY
+		RAND_add(buf,i,(double)i);
+#else
+		/* even if n != i, use the full array */
+		RAND_add(buf,n,(double)i);
+#endif
+		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;
+#ifndef OPENSSL_NO_POSIX_IO
+	struct stat sb;
+	
+	i=stat(file,&sb);
+	if (i != -1) { 
+#if defined(S_ISBLK) && defined(S_ISCHR)
+	  if (S_ISBLK(sb.st_mode) || S_ISCHR(sb.st_mode)) {
+	    /* 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
+	}
+#endif
+
+#if defined(O_CREAT) && !defined(OPENSSL_NO_POSIX_IO) && !defined(OPENSSL_SYS_VMS)
+	{
+#ifndef O_BINARY
+#define O_BINARY 0
+#endif
+	/* chmod(..., 0600) is too late to protect the file,
+	 * permissions should be restrictive from the start */
+	int fd = open(file, O_WRONLY|O_CREAT|O_BINARY, 0600);
+	if (fd != -1)
+		out = fdopen(fd, "wb");
+	}
+#endif
+
+#ifdef OPENSSL_SYS_VMS
+	/* VMS NOTE: Prior versions of this routine created a _new_
+	 * version of the rand file for each call into this routine, then
+	 * deleted all existing versions named ;-1, and finally renamed
+	 * the current version as ';1'. Under concurrent usage, this
+	 * resulted in an RMS race condition in rename() which could
+	 * orphan files (see vms message help for RMS$_REENT). With the
+	 * fopen() calls below, openssl/VMS now shares the top-level
+	 * version of the rand file. Note that there may still be
+	 * conditions where the top-level rand file is locked. If so, this
+	 * code will then create a new version of the rand file. Without
+	 * the delete and rename code, this can result in ascending file
+	 * versions that stop at version 32767, and this routine will then
+	 * return an error. The remedy for this is to recode the calling
+	 * application to avoid concurrent use of the rand file, or
+	 * synchronize usage at the application level. Also consider
+	 * whether or not you NEED a persistent rand file in a concurrent
+	 * use situation. 
+	 */
+
+	out = vms_fopen(file,"rb+",VMS_OPEN_ATTRS);
+	if (out == NULL)
+		out = vms_fopen(file,"wb",VMS_OPEN_ATTRS);
+#else
+	if (out == NULL)
+		out = fopen(file,"wb");
+#endif
+	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;
+                }
+
+	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;
+#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);
+			}
+		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 (!buf[0])
+		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);
+	}