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#ifndef QPDFCRYPTO_GNUTLS_HH
#define QPDFCRYPTO_GNUTLS_HH
#include <qpdf/QPDFCryptoImpl.hh>
#include <memory>
// gnutls headers must be last to prevent them from interfering with other headers. gnutls.h has to
// be included first.
#include <gnutls/gnutls.h>
// This comment prevents clang-format from putting crypto.h before gnutls.h
#include <gnutls/crypto.h>
class QPDFCrypto_gnutls: public QPDFCryptoImpl
{
public:
QPDFCrypto_gnutls();
virtual ~QPDFCrypto_gnutls();
virtual void provideRandomData(unsigned char* data, size_t len);
virtual void MD5_init();
virtual void MD5_update(unsigned char const* data, size_t len);
virtual void MD5_finalize();
virtual void MD5_digest(MD5_Digest);
virtual void RC4_init(unsigned char const* key_data, int key_len = -1);
virtual void RC4_process(unsigned char const* in_data, size_t len, unsigned char* out_data = 0);
virtual void RC4_finalize();
virtual void SHA2_init(int bits);
virtual void SHA2_update(unsigned char const* data, size_t len);
virtual void SHA2_finalize();
virtual std::string SHA2_digest();
virtual void rijndael_init(
bool encrypt,
unsigned char const* key_data,
size_t key_len,
bool cbc_mode,
unsigned char* cbc_block);
virtual void rijndael_process(unsigned char* in_data, unsigned char* out_data);
virtual void rijndael_finalize();
private:
void badBits();
gnutls_hash_hd_t hash_ctx;
gnutls_cipher_hd_t cipher_ctx;
int sha2_bits;
bool encrypt;
bool cbc_mode;
char digest[64];
unsigned char const* aes_key_data;
size_t aes_key_len;
};
#endif // QPDFCRYPTO_GNUTLS_HH
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