1 files changed, 273 insertions, 0 deletions

diff --git a/src/lib/libcrypto/rand/randfile.c b/src/lib/libcrypto/rand/randfile.c
new file mode 100644
index 0000000000..cfbec2ac1f
--- /dev/null
+++ b/src/lib/libcrypto/rand/randfile.c
@@ -0,0 +1,273 @@
+/* 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;
+        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 */
+        }
+        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 (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); 
+          }
+        }
+
+#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;
+        struct stat sb;
+
+        if (issetugid() == 0)
+                s=getenv("RANDFILE");
+        if (s != NULL && *s && strlen(s) + 1 < size)
+                {
+                if (strlcpy(buf,s,size) >= size)
+                        return NULL;
+                }
+        else
+                {
+                if (issetugid() == 0)
+                        s=getenv("HOME");
+#ifdef DEFAULT_HOME
+                if (s == NULL)
+                        {
+                        s = DEFAULT_HOME;
+                        }
+#endif
+                if (s && *s && strlen(s)+strlen(RFILE)+2 < size)
+                        {
+                        strlcpy(buf,s,size);
+#ifndef OPENSSL_SYS_VMS
+                        strlcat(buf,"/",size);
+#endif
+                        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 (strlcpy(buf,"/dev/arandom",size) >= size) {
+                        return(NULL);
+                }       
+        if (stat(buf,&sb) == -1)
+                if (strlcpy(buf,"/dev/arandom",size) >= size) {
+                        return(NULL);
+                }       
+
+#endif
+        return(buf);
+        }