mirror of
https://github.com/qpdf/qpdf.git
synced 2024-11-10 23:20:58 +00:00
6c39aa8763
Use PointerHolder in several places where manually memory allocation and deallocation were being used. This helps to protect against memory leaks when exceptions are thrown in surprising places.
49 lines
1010 B
C++
49 lines
1010 B
C++
#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 = PointerHolder<unsigned char>(
|
|
true, new unsigned char[out_bufsize]);
|
|
}
|
|
|
|
Pl_RC4::~Pl_RC4()
|
|
{
|
|
}
|
|
|
|
void
|
|
Pl_RC4::write(unsigned char* data, size_t len)
|
|
{
|
|
if (this->outbuf.getPointer() == 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, bytes, outbuf.getPointer());
|
|
p += bytes;
|
|
getNext()->write(outbuf.getPointer(), bytes);
|
|
}
|
|
}
|
|
|
|
void
|
|
Pl_RC4::finish()
|
|
{
|
|
this->outbuf = 0;
|
|
this->getNext()->finish();
|
|
}
|