X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/d05005c11f6c702273be30d4c306e94081df06aa..bf2c43c76e2819be443ab1d830ab68d9569d66b1:/src/common/base64.cpp?ds=sidebyside

diff --git a/src/common/base64.cpp b/src/common/base64.cpp
index 2fb58c5b29..5ee3a7a3c7 100644
--- a/src/common/base64.cpp
+++ b/src/common/base64.cpp
@@ -3,12 +3,15 @@
 // Purpose:     implementation of BASE64 encoding/decoding functions
 // Author:      Charles Reimers, Vadim Zeitlin
 // Created:     2007-06-18
-// RCS-ID:      $Id$
 // Licence:     wxWindows licence
 ///////////////////////////////////////////////////////////////////////////////
 
 #include "wx/wxprec.h"
 
+#ifdef __BORLANDC__
+    #pragma hdrstop
+#endif
+
 #if wxUSE_BASE64
 
 #include "wx/base64.h"
@@ -16,9 +19,9 @@
 size_t
 wxBase64Encode(char *dst, size_t dstLen, const void *src_, size_t srcLen)
 {
-    wxCHECK_MSG( src_, wxCONV_FAILED, _T("NULL input buffer") );
+    wxCHECK_MSG( src_, wxCONV_FAILED, wxT("NULL input buffer") );
 
-    const unsigned char *src = wx_static_cast(const unsigned char *, src_);
+    const unsigned char *src = static_cast<const unsigned char *>(src_);
 
     static const char b64[] =
         "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
@@ -69,9 +72,9 @@ wxBase64Decode(void *dst_, size_t dstLen,
                wxBase64DecodeMode mode,
                size_t *posErr)
 {
-    wxCHECK_MSG( src, wxCONV_FAILED, _T("NULL input buffer") );
+    wxCHECK_MSG( src, wxCONV_FAILED, wxT("NULL input buffer") );
 
-    unsigned char *dst = wx_static_cast(unsigned char *, dst_);
+    unsigned char *dst = static_cast<unsigned char *>(dst_);
 
     size_t decLen = 0;
 
@@ -118,7 +121,7 @@ wxBase64Decode(void *dst_, size_t dstLen,
     const char *p;
     for ( p = src; srcLen; p++, srcLen-- )
     {
-        const unsigned char c = decode[(int)*p]; // cast to suppress warnings
+        const unsigned char c = decode[static_cast<unsigned char>(*p)];
         switch ( c )
         {
             case WSP:
@@ -132,7 +135,7 @@ wxBase64Decode(void *dst_, size_t dstLen,
 
                 // force the loop to stop and an error to be returned
                 n = -1;
-                srcLen = 0;
+                srcLen = 1;
                 break;
 
             case PAD:
@@ -156,7 +159,7 @@ wxBase64Decode(void *dst_, size_t dstLen,
                 {
                     // force the loop terminate with an error
                     n = -1;
-                    srcLen = 0;
+                    srcLen = 1;
                 }
                 break;
 
@@ -165,7 +168,7 @@ wxBase64Decode(void *dst_, size_t dstLen,
                 {
                     // nothing is allowed after the end so provoke error return
                     n = -1;
-                    srcLen = 0;
+                    srcLen = 1;
                     break;
                 }
 
@@ -183,8 +186,15 @@ wxBase64Decode(void *dst_, size_t dstLen,
 
                 // undo the bit shifting done during encoding
                 *dst++ = in[0] << 2 | in[1] >> 4;
-                *dst++ = in[1] << 4 | in[2] >> 2;
-                *dst++ = in[2] << 6 | in[3];
+
+                // be careful to not overwrite the output buffer with NUL pad
+                // bytes
+                if ( padLen != 2 )
+                {
+                    *dst++ = in[1] << 4 | in[2] >> 2;
+                    if ( !padLen )
+                        *dst++ = in[2] << 6 | in[3];
+                }
             }
 
             n = 0;
@@ -194,7 +204,11 @@ wxBase64Decode(void *dst_, size_t dstLen,
     if ( n )
     {
         if ( posErr )
-            *posErr = p - src;
+        {
+            // notice that the error was on a previous position as we did one
+            // extra "p++" in the loop line after it
+            *posErr = p - src - 1;
+        }
 
         return wxCONV_FAILED;
     }
@@ -208,7 +222,7 @@ wxMemoryBuffer wxBase64Decode(const char *src,
                               size_t *posErr)
 {
     wxMemoryBuffer buf;
-    wxCHECK_MSG( src, buf, _T("NULL input buffer") );
+    wxCHECK_MSG( src, buf, wxT("NULL input buffer") );
 
     if ( srcLen == wxNO_LEN )
         srcLen = strlen(src);