int Convert::ToBase64CharArray(ByteArray& inArray, int offsetIn, int length, CharArray& outArray, int offsetOut)
{
using namespace Security;
if(inArray.IsNull())
throw ArgumentNullException(L"inArray");
if (outArray.IsNull())
throw ArgumentNullException(L"outArray");
if(offsetIn < 0 || length < 0 || offsetOut < 0)
throw ArgumentOutOfRangeException(L"offsetIn, length, offsetOut < 0");
// avoid integer overflow
if(offsetIn > (int)inArray.Length() - length)
throw ArgumentOutOfRangeException(L"offsetIn + length > array.Length");
// note: normally ToBase64Transform doesn't support multiple block processing
ByteArray outArr = Cryptography::Base64Helper::TransformFinalBlock(inArray, offsetIn, length);
Text::ASCIIEncoding enc;
CharArray cOutArr = enc.GetChars(outArr);
// avoid integer overflow
if(offsetOut > (int)(outArray.Length() - cOutArr.Length()) )
throw ArgumentOutOfRangeException(L"offsetOut + cOutArr.Length > outArray.Length");
outArray.Base(offsetOut);
for(int32 i = 0; i < (int32)cOutArr.Length(); ++i)
outArray[i] = cOutArr[i];
outArray.Base(0);
return (int)cOutArr.Length();
}
ByteArray Convert::FromBase64CharArray(CharArray& inArray, int offset, int length)
{
if(inArray.IsNull())
throw ArgumentNullException(L"inArray");
if(offset < 0)
throw ArgumentOutOfRangeException(L"offset < 0");
if(length < 0)
throw ArgumentOutOfRangeException(L"length < 0");
// avoid integer overflow
if(offset > (int)inArray.Length() - length)
throw ArgumentOutOfRangeException(L"offset + length > array.Length");
return InternalFromBase64CharArray(inArray, offset, length);
}