void PEM_StripEncapsulatedBoundary(BufferedTransformation& bt, const SecByteBlock& pre, const SecByteBlock& post)
{
ByteQueue temp;
SecByteBlock::const_iterator it;
int n = 1, prePos = -1, postPos = -1;
while(bt.AnyRetrievable() && n++)
{
SecByteBlock line, unused;
PEM_ReadLine(bt, line, unused);
// The write associated with an empty line must to occur. Otherwise, we loose the CR or LF
// in an ecrypted private key between the control fields and the encapsulated text.
//if(line.empty())
// continue;
it = Search(line, pre);
if(it != line.end())
{
prePos = n;
continue;
}
it = Search(line, post);
if(it != line.end())
{
postPos = n;
continue;
}
PEM_WriteLine(temp, line);
}
if(prePos == -1)
{
string msg = "PEM_StripEncapsulatedBoundary: '";
msg += string((char*)pre.data(), pre.size()) + "' not found";
throw InvalidDataFormat(msg);
}
if(postPos == -1)
{
string msg = "PEM_StripEncapsulatedBoundary: '";
msg += string((char*)post.data(), post.size()) + "' not found";
throw InvalidDataFormat(msg);
}
if(prePos > postPos)
throw InvalidDataFormat("PEM_StripEncapsulatedBoundary: header boundary follows footer boundary");
temp.TransferTo(bt);
}
void PutDecodedDatumInto(const TestData &data, const char *name, BufferedTransformation &target)
{
std::string s1 = GetRequiredDatum(data, name), s2;
while (!s1.empty())
{
while (s1[0] == ' ')
{
s1 = s1.substr(1);
if (s1.empty())
return; //avoid invalid read if s1 is empty
}
int repeat = 1;
if (s1[0] == 'r')
{
repeat = atoi(s1.c_str()+1);
s1 = s1.substr(s1.find(' ')+1);
}
s2 = ""; // MSVC 6 doesn't have clear();
if (s1[0] == '\"')
{
s2 = s1.substr(1, s1.find('\"', 1)-1);
s1 = s1.substr(s2.length() + 2);
}
else if (s1.substr(0, 2) == "0x")
{
StringSource(s1.substr(2, s1.find(' ')), true, new HexDecoder(new StringSink(s2)));
s1 = s1.substr(STDMIN(s1.find(' '), s1.length()));
}
else
{
StringSource(s1.substr(0, s1.find(' ')), true, new HexDecoder(new StringSink(s2)));
s1 = s1.substr(STDMIN(s1.find(' '), s1.length()));
}
ByteQueue q;
while (repeat--)
{
q.Put((const byte *)s2.data(), s2.size());
if (q.MaxRetrievable() > 4*1024 || repeat == 0)
q.TransferTo(target);
}
}
}