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#ifndef PL_SHA2_HH
#define PL_SHA2_HH
// Bits must be a supported number of bits, currently only 256, 384, or 512. Passing 0 as bits
// leaves the pipeline uncommitted, in which case resetBits must be called before the pipeline is
// used. If a next is provided, this pipeline sends its output to its successor unmodified. After
// calling finish, the SHA2 checksum of the data that passed through the pipeline is available.
// This pipeline is reusable; i.e., it is safe to call write() after calling finish(). The first
// call to write() after a call to finish() initializes a new SHA2 object. resetBits may also be
// called between finish and the next call to write.
#include <qpdf/Pipeline.hh>
#include <qpdf/QPDFCryptoImpl.hh>
#include <memory>
class Pl_SHA2: public Pipeline
{
public:
Pl_SHA2(int bits = 0, Pipeline* next = nullptr);
~Pl_SHA2() override = default;
void write(unsigned char const*, size_t) override;
void finish() override;
void resetBits(int bits);
std::string getHexDigest();
std::string getRawDigest();
private:
bool in_progress;
std::shared_ptr<QPDFCryptoImpl> crypto;
};
#endif // PL_SHA2_HH
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