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#include <qpdf/Pl_RC4.hh>
#include <qpdf/QUtil.hh>
Pl_RC4::Pl_RC4(char const* identifier, Pipeline* next,
unsigned char const* key_data, int key_len,
size_t out_bufsize) :
Pipeline(identifier, next),
out_bufsize(out_bufsize),
rc4(key_data, key_len)
{
this->outbuf = new unsigned char[out_bufsize];
}
Pl_RC4::~Pl_RC4()
{
if (this->outbuf)
{
delete [] this->outbuf;
this->outbuf = 0;
}
}
void
Pl_RC4::write(unsigned char* data, size_t len)
{
if (this->outbuf == 0)
{
throw std::logic_error(
this->identifier +
": Pl_RC4: write() called after finish() called");
}
size_t bytes_left = len;
unsigned char* p = data;
while (bytes_left > 0)
{
size_t bytes =
(bytes_left < this->out_bufsize ? bytes_left : out_bufsize);
bytes_left -= bytes;
rc4.process(p, (int)bytes, outbuf);
p += bytes;
getNext()->write(outbuf, bytes);
}
}
void
Pl_RC4::finish()
{
if (this->outbuf)
{
delete [] this->outbuf;
this->outbuf = 0;
}
this->getNext()->finish();
}
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