Crypto++  8.2
Free C++ class library of cryptographic schemes
md2.h
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1 // md2.h - originally written and placed in the public domain by Wei Dai
2 
3 /// \file md2.h
4 /// \brief Classes for the MD2 message digest
5 /// \since Crypto++ 3.0
6 
7 #ifndef CRYPTOPP_MD2_H
8 #define CRYPTOPP_MD2_H
9 
10 #include "cryptlib.h"
11 #include "secblock.h"
12 
13 NAMESPACE_BEGIN(CryptoPP)
14 
15 namespace Weak1 {
16 
17 /// \brief MD2 message digest
18 /// \sa <a href="http://www.cryptolounge.org/wiki/MD2">MD2</a>
19 /// \since Crypto++ 3.0
20 class MD2 : public HashTransformation
21 {
22 public:
23  MD2();
24  void Update(const byte *input, size_t length);
25  void TruncatedFinal(byte *hash, size_t size);
26  unsigned int DigestSize() const {return DIGESTSIZE;}
27  unsigned int BlockSize() const {return BLOCKSIZE;}
28  CRYPTOPP_STATIC_CONSTEXPR const char* StaticAlgorithmName() {return "MD2";}
29 
30  CRYPTOPP_CONSTANT(DIGESTSIZE = 16)
31  CRYPTOPP_CONSTANT(BLOCKSIZE = 16)
32 
33 private:
34  void Transform();
35  void Init();
36  SecByteBlock m_X, m_C, m_buf;
37  unsigned int m_count;
38 };
39 
40 }
41 #if CRYPTOPP_ENABLE_NAMESPACE_WEAK >= 1
42 namespace Weak {using namespace Weak1;} // import Weak1 into CryptoPP::Weak
43 #else
44 using namespace Weak1; // import Weak1 into CryptoPP with warning
45 #ifdef __GNUC__
46 #warning "You may be using a weak algorithm that has been retained for backwards compatibility. Please '#define CRYPTOPP_ENABLE_NAMESPACE_WEAK 1' before including this .h file and prepend the class name with 'Weak::' to remove this warning."
47 #else
48 #pragma message("You may be using a weak algorithm that has been retained for backwards compatibility. Please '#define CRYPTOPP_ENABLE_NAMESPACE_WEAK 1' before including this .h file and prepend the class name with 'Weak::' to remove this warning.")
49 #endif
50 #endif
51 
52 NAMESPACE_END
53 
54 #endif
unsigned int DigestSize() const
Provides the digest size of the hash.
Definition: md2.h:26
Abstract base classes that provide a uniform interface to this library.
SecBlock<byte> typedef.
Definition: secblock.h:1058
Classes and functions for secure memory allocations.
unsigned int BlockSize() const
Provides the block size of the compression function.
Definition: md2.h:27
MD2 message digest.
Definition: md2.h:20
Interface for hash functions and data processing part of MACs.
Definition: cryptlib.h:1113
Crypto++ library namespace.
Namespace containing weak and wounded algorithms.
Definition: arc4.cpp:14