diff options
| author | Jeffrey Walton <noloader@gmail.com> | 2018-07-05 00:29:07 -0400 |
|---|---|---|
| committer | Jeffrey Walton <noloader@gmail.com> | 2018-07-05 00:29:07 -0400 |
| commit | dd31eb80c001d4571f89eb2be52dbdc022c60ae9 (patch) | |
| tree | 82eb884f4044984ec8d394316deebc5fe2cbf0ce /hc128.h | |
| parent | 93f46e43025a2ea36ec5c64eeb901e88ad1add38 (diff) | |
| download | cryptopp-git-dd31eb80c001d4571f89eb2be52dbdc022c60ae9.tar.gz | |
Add HC-128 stream cipher (GH #679)
Diffstat (limited to 'hc128.h')
| -rw-r--r-- | hc128.h | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/hc128.h b/hc128.h new file mode 100644 index 00000000..39f9df3d --- /dev/null +++ b/hc128.h @@ -0,0 +1,67 @@ +// hc128.h - written and placed in the public domain by Jeffrey Walton
+// based on public domain code by Hongjun Wu.
+//
+// The reference materials and source files are available at
+// The eSTREAM Project, http://www.ecrypt.eu.org/stream/e2-hc128.html.
+
+/// \file hc128.h
+/// \brief Classes for HC-128 stream cipher
+/// \sa <A HREF="http://www.ecrypt.eu.org/stream/e2-hc128.html">The
+/// eSTREAM Project | HC-128</A> and
+/// <A HREF="https://www.cryptopp.com/wiki/HC-128">Crypto++ Wiki | HC-128</A>.
+/// \since Crypto++ 7.1
+
+#ifndef CRYPTOPP_HC128_H
+#define CRYPTOPP_HC128_H
+
+#include "strciphr.h"
+#include "secblock.h"
+
+NAMESPACE_BEGIN(CryptoPP)
+
+/// \brief HC-128 stream cipher information
+/// \since Crypto++ 7.1
+struct HC128Info : public FixedKeyLength<16, SimpleKeyingInterface::UNIQUE_IV, 16>
+{
+ CRYPTOPP_STATIC_CONSTEXPR const char* StaticAlgorithmName() { return "HC-128"; }
+};
+
+/// \brief HC-128 stream cipher implementation
+/// \since Crypto++ 7.1
+class HC128Policy : public AdditiveCipherConcretePolicy<word32, 16>, public HC128Info
+{
+protected:
+ void CipherSetKey(const NameValuePairs ¶ms, const byte *key, size_t length);
+ void OperateKeystream(KeystreamOperation operation, byte *output, const byte *input, size_t iterationCount);
+ void CipherResynchronize(byte *keystreamBuffer, const byte *iv, size_t length);
+ bool CanOperateKeystream() const { return true; }
+ bool CipherIsRandomAccess() const { return false; }
+
+ void GenerateKeystream(word32* keystream);
+ void SetupUpdate();
+
+private:
+ word32 m_T[1024]; /* P[i] = T[i]; Q[i] = T[1024+i];*/
+ word32 m_X[16];
+ word32 m_Y[16];
+ word32 m_key[8];
+ word32 m_iv[8];
+ word32 m_ctr; /*counter1024 = i mod 1024 at the i-th step */
+};
+
+/// \brief HC-128 stream cipher
+/// \details HC-128 is a stream cipher developed by Hongjun Wu. HC-128 is one of the
+/// final four Profile 1 (software) ciphers selected for the eSTREAM Portfolio.
+/// \sa <A HREF="http://www.ecrypt.eu.org/stream/e2-hc128.html">The
+/// eSTREAM Project | HC-128</A> and
+/// <A HREF="https://www.cryptopp.com/wiki/HC-128">Crypto++ Wiki | HC-128</A>.
+/// \since Crypto++ 7.1
+struct HC128 : public HC128Info, public SymmetricCipherDocumentation
+{
+ typedef SymmetricCipherFinal<ConcretePolicyHolder<HC128Policy, AdditiveCipherTemplate<> >, HC128Info> Encryption;
+ typedef Encryption Decryption;
+};
+
+NAMESPACE_END
+
+#endif // CRYPTOPP_HC128_H
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