X-Git-Url: https://git.openssl.org/gitweb/?p=openssl.git;a=blobdiff_plain;f=crypto%2Fo_fopen.c;h=f08f99b414f5ce475ec6716690e8f78741ff3e80;hp=a3a006574d70a15c4e0c76d8072643ccc8cbe6d9;hb=bfb10b975818d1887d676d309fcc21a765611f6d;hpb=e8aa8b6c8f6d4e2b2bbd5e5721d977b0a6aa3cee

diff --git a/crypto/o_fopen.c b/crypto/o_fopen.c
index a3a006574d..f08f99b414 100644
--- a/crypto/o_fopen.c
+++ b/crypto/o_fopen.c
@@ -1,5 +1,5 @@
 /*
- * Copyright 2016 The OpenSSL Project Authors. All Rights Reserved.
+ * Copyright 2016-2018 The OpenSSL Project Authors. All Rights Reserved.
  *
  * Licensed under the OpenSSL license (the "License").  You may not use
  * this file except in compliance with the License.  You can obtain a copy
@@ -7,11 +7,35 @@
  * https://www.openssl.org/source/license.html
  */
 
+# if defined(__linux) || defined(__sun) || defined(__hpux)
+/*
+ * Following definition aliases fopen to fopen64 on above mentioned
+ * platforms. This makes it possible to open and sequentially access files
+ * larger than 2GB from 32-bit application. It does not allow to traverse
+ * them beyond 2GB with fseek/ftell, but on the other hand *no* 32-bit
+ * platform permits that, not with fseek/ftell. Not to mention that breaking
+ * 2GB limit for seeking would require surgery to *our* API. But sequential
+ * access suffices for practical cases when you can run into large files,
+ * such as fingerprinting, so we can let API alone. For reference, the list
+ * of 32-bit platforms which allow for sequential access of large files
+ * without extra "magic" comprise *BSD, Darwin, IRIX...
+ */
+#  ifndef _FILE_OFFSET_BITS
+#   define _FILE_OFFSET_BITS 64
+#  endif
+# endif
+
 #include "internal/cryptlib.h"
 
 #if !defined(OPENSSL_NO_STDIO)
 
 # include <stdio.h>
+# ifdef _WIN32
+#  include <windows.h>
+# endif
+# ifdef __DJGPP__
+#  include <unistd.h>
+# endif
 
 FILE *openssl_fopen(const char *filename, const char *mode)
 {
@@ -61,13 +85,14 @@ FILE *openssl_fopen(const char *filename, const char *mode)
     {
         char *newname = NULL;
 
-        if (!HAS_LFN_SUPPORT(filename)) {
+        if (pathconf(filename, _PC_NAME_MAX) <= 12) {  /* 8.3 file system? */
             char *iterator;
             char lastchar;
 
-            newname = OPENSSL_malloc(strlen(filename) + 1);
-            if (newname == NULL)
+            if ((newname = OPENSSL_malloc(strlen(filename) + 1)) == NULL) {
+                CRYPTOerr(CRYPTO_F_OPENSSL_FOPEN, ERR_R_MALLOC_FAILURE);
                 return NULL;
+            }
 
             for (iterator = newname, lastchar = '\0';
                 *filename; filename++, iterator++) {