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53 lines
1.3 KiB
C++
53 lines
1.3 KiB
C++
#ifndef __PL_AES_PDF_HH__
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#define __PL_AES_PDF_HH__
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#include <qpdf/Pipeline.hh>
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#include <qpdf/qpdf-config.h>
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// This pipeline implements AES-128 with CBC and block padding as
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// specified in the PDF specification.
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class Pl_AES_PDF: public Pipeline
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{
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public:
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// key_data should be a pointer to key_size bytes of data
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static unsigned int const key_size = 16;
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DLL_EXPORT
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Pl_AES_PDF(char const* identifier, Pipeline* next,
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bool encrypt, unsigned char const key[key_size]);
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DLL_EXPORT
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virtual ~Pl_AES_PDF();
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DLL_EXPORT
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virtual void write(unsigned char* data, int len);
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DLL_EXPORT
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virtual void finish();
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// For testing only; PDF always uses CBC
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DLL_EXPORT
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void disableCBC();
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// For testing only: use a fixed initialization vector for CBC
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DLL_EXPORT
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static void useStaticIV();
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private:
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void flush(bool discard_padding);
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void initializeVector();
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static unsigned int const buf_size = 16;
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static bool use_static_iv;
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bool encrypt;
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bool cbc_mode;
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bool first;
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unsigned int offset;
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unsigned char key[key_size];
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uint32_t rk[key_size + 28];
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unsigned char inbuf[buf_size];
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unsigned char outbuf[buf_size];
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unsigned char cbc_block[buf_size];
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unsigned int nrounds;
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};
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#endif // __PL_AES_PDF_HH__
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