big integer from buffer bug

DesktopEditor/common/BigInteger.h

@@ -55,18 +55,10 @@ public:
 
         for (int i = 0; i < size; i++)
         {
-            int val = 0;
-            char _c = data[i];
-            if (_c >= '0' && _c <= '9')
-                val = _c - '0';
-            else if (_c >= 'A' && _c <= 'F')
-                val = 10 + _c - 'A';
-            else if (_c >= 'a' && _c <= 'f')
-                val = 10 + _c - 'a';
+            CBigInteger tmp((int)data[i]);
 
-            CBigInteger tmp(val);
             for (int j = size - 1 - i; j > 0; --j)
-                tmp *= 10;
+                tmp *= 256;
 
             *this += tmp;
         }

DesktopEditor/xmlsec/test/windows_list_serts/main.cpp

@@ -39,6 +39,10 @@ void main(void)
         CBigInteger val3 = int1 * int2;
 
         CBigInteger int3("66A1F302407647974D18D489855371B5", 16);
+
+        unsigned char buffer[16] = { 0x66, 0xA1, 0xF3, 0x02, 0x40, 0x76, 0x47, 0x97, 0x4D, 0x18, 0xD4, 0x89, 0x85, 0x53, 0x71, 0xB5 };
+        CBigInteger val4(buffer, 16);
+
         std::string sValue = int3.ToString();
     }