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