1 files changed, 271 insertions, 0 deletions
diff --git a/cpp/src/Ice/Base64.cpp b/cpp/src/Ice/Base64.cpp
new file mode 100644
index 00000000000..9f241146534
--- /dev/null
+++ b/cpp/src/Ice/Base64.cpp
@@ -0,0 +1,271 @@
+// **********************************************************************
+//
+// Copyright (c) 2003-2007 ZeroC, Inc. All rights reserved.
+//
+// This copy of Ice is licensed to you under the terms described in the
+// ICE_LICENSE file included in this distribution.
+//
+// **********************************************************************
+
+#include <Ice/Base64.h>
+#ifdef __BCPLUSPLUS__
+#  include <iterator>
+#endif
+
+using namespace std;
+
+string
+IceInternal::Base64::encode(const vector<unsigned char>& plainSeq)
+{
+    string retval;
+
+    if(plainSeq.size() == 0) 
+    {
+        return retval;
+    }
+ 
+    // Reserve enough space for the returned base64 string
+    size_t base64Bytes = (((plainSeq.size() * 4) / 3) + 1);
+    size_t newlineBytes = (((base64Bytes * 2) / 76) + 1);
+    size_t totalBytes = base64Bytes + newlineBytes;
+ 
+    retval.reserve(totalBytes);
+
+    unsigned char by1 = 0;
+    unsigned char by2 = 0;
+    unsigned char by3 = 0;
+    unsigned char by4 = 0;
+    unsigned char by5 = 0;
+    unsigned char by6 = 0;
+    unsigned char by7 = 0;
+
+    for(size_t i = 0; i < plainSeq.size(); i += 3)
+    {
+        by1 = plainSeq[i];
+        by2 = 0;
+        by3 = 0;
+
+        if((i + 1) < plainSeq.size())
+        {
+            by2 = plainSeq[i+1];
+        }
+
+        if((i + 2) < plainSeq.size())
+        {
+            by3 = plainSeq[i+2];
+        }
+ 
+        by4 = by1 >> 2;
+        by5 = ((by1 & 0x3) << 4) | (by2 >> 4);
+        by6 = ((by2 & 0xf) << 2) | (by3 >> 6);
+        by7 = by3 & 0x3f;
+
+        retval += encode(by4);
+        retval += encode(by5);
+ 
+        if((i + 1) < plainSeq.size())
+        {
+            retval += encode(by6);
+        }
+        else
+        {
+            retval += "=";
+        }
+ 
+        if((i + 2) < plainSeq.size())
+        {
+            retval += encode(by7);
+        }
+        else
+        {
+            retval += "=";
+        }
+    }
+
+    string outString;
+    outString.reserve(totalBytes);
+    string::iterator iter = retval.begin();
+
+    while((retval.end() - iter) > 76)
+    {
+        copy(iter, iter+76, back_inserter(outString));
+        outString += "\r\n";
+        iter += 76;
+    }
+
+    copy(iter, retval.end(), back_inserter(outString));
+
+    return outString;
+}
+
+vector<unsigned char>
+IceInternal::Base64::decode(const string& str)
+{
+    string newStr;
+
+    newStr.reserve(str.length());
+
+    for(size_t j = 0; j < str.length(); j++)
+    {
+        if(isBase64(str[j]))
+        {
+            newStr += str[j];
+        }
+    }
+
+    vector<unsigned char> retval;
+
+    if(newStr.length() == 0)
+    {
+        return retval;
+    }
+
+    // Note: This is how we were previously computing the size of the return
+    //       sequence.  The method below is more efficient (and correct).
+    // size_t lines = str.size() / 78;
+    // size_t totalBytes = (lines * 76) + (((str.size() - (lines * 78)) * 3) / 4);
+
+    // Figure out how long the final sequence is going to be.
+    size_t totalBytes = (newStr.size() * 3 / 4) + 1;
+
+    retval.reserve(totalBytes);
+
+    unsigned char by1 = 0;
+    unsigned char by2 = 0;
+    unsigned char by3 = 0;
+    unsigned char by4 = 0;
+
+    char c1, c2, c3, c4;
+
+    for(size_t i = 0; i < newStr.length(); i += 4)
+    {
+        c1 = 'A';
+        c2 = 'A';
+        c3 = 'A';
+        c4 = 'A';
+
+        c1 = newStr[i];
+
+        if((i + 1) < newStr.length())
+        {
+            c2 = newStr[i + 1];
+        }
+
+        if((i + 2) < newStr.length())
+        {
+            c3 = newStr[i + 2];
+        }
+
+        if((i + 3) < newStr.length())
+        {
+            c4 = newStr[i + 3];
+        }
+
+        by1 = decode(c1);
+        by2 = decode(c2);
+        by3 = decode(c3);
+        by4 = decode(c4);
+
+        retval.push_back((by1 << 2) | (by2 >> 4));
+
+        if(c3 != '=')
+        {
+            retval.push_back(((by2 & 0xf) << 4) | (by3 >> 2));
+        }
+
+        if(c4 != '=')
+        {
+            retval.push_back(((by3 & 0x3) << 6) | by4);
+        }
+    }
+
+    return retval;
+}
+
+bool
+IceInternal::Base64::isBase64(char c)
+{
+    if(c >= 'A' && c <= 'Z')
+    {
+        return true;
+    }
+
+    if(c >= 'a' && c <= 'z')
+    {
+        return true;
+    }
+
+    if(c >= '0' && c <= '9')
+    {
+        return true;
+    }
+
+    if(c == '+')
+    {
+        return true;
+    }
+
+    if(c == '/')
+    {
+        return true;
+    }
+
+    if(c == '=')
+    {
+        return true;
+    }
+
+    return false;
+}
+
+char
+IceInternal::Base64::encode(unsigned char uc)
+{
+    if(uc < 26)
+    {
+        return 'A' + uc;
+    }
+    
+    if(uc < 52)
+    {
+        return 'a' + (uc - 26);
+    }
+    
+    if(uc < 62)
+    {
+        return '0' + (uc - 52);
+    }
+    
+    if(uc == 62)
+    {
+        return '+';
+    }
+
+    return '/';
+}
+
+unsigned char
+IceInternal::Base64::decode(char c)
+{
+    if(c >= 'A' && c <= 'Z')
+    {
+        return c - 'A';
+    }
+
+    if(c >= 'a' && c <= 'z')
+    {
+        return c - 'a' + 26;
+    }
+
+    if(c >= '0' && c <= '9')
+    {
+        return c - '0' + 52;
+    }
+
+    if(c == '+')
+    {
+        return 62;
+    }
+ 
+    return 63;
+}