Crypto++  5.6.5
Free C++ class library of cryptographic schemes
pkcspad.h
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1 // pkcspad.h - originally written and placed in the public domain by Wei Dai
2 
3 /// \file pkcspad.h
4 /// \brief Classes for PKCS padding schemes
5 /// \details PKCS #1 v1.5, v2.0 and P1363a allow MD2, MD5, SHA1, SHA224, SHA256, SHA384,
6 /// SHA512, Tiger and RipeMd-160 to be instantiated.
7 
8 #ifndef CRYPTOPP_PKCSPAD_H
9 #define CRYPTOPP_PKCSPAD_H
10 
11 #include "cryptlib.h"
12 #include "pubkey.h"
13 #include "hashfwd.h"
14 
15 #ifdef CRYPTOPP_IS_DLL
16 #include "sha.h"
17 #endif
18 
19 NAMESPACE_BEGIN(CryptoPP)
20 
21 /// \brief PKCS #1 v1.5 Encryption Padding Scheme
22 /// \sa <a href="http://www.weidai.com/scan-mirror/ca.html#cem_PKCS1-1.5">EME-PKCS1-v1_5</a>
24 {
25 public:
26  CRYPTOPP_STATIC_CONSTEXPR const char* StaticAlgorithmName() {return "EME-PKCS1-v1_5";}
27 
28  size_t MaxUnpaddedLength(size_t paddedLength) const;
29  void Pad(RandomNumberGenerator &rng, const byte *raw, size_t inputLength, byte *padded, size_t paddedLength, const NameValuePairs &parameters) const;
30  DecodingResult Unpad(const byte *padded, size_t paddedLength, byte *raw, const NameValuePairs &parameters) const;
31 };
32 
33 /// \brief PKCS #1 decoration data structure
34 template <class H> class PKCS_DigestDecoration
35 {
36 public:
37  static const byte decoration[];
38  static const unsigned int length;
39 };
40 
41 // PKCS_DigestDecoration can be instantiated with the following
42 // classes as specified in PKCS #1 v2.0 and P1363a
43 // SHA1, SHA224, SHA256, SHA384, SHA512, Tiger, RIPEMD160, MD2, MD5
44 
45 #if defined(CRYPTOPP_IS_DLL)
46 CRYPTOPP_DLL_TEMPLATE_CLASS PKCS_DigestDecoration<SHA1>;
47 CRYPTOPP_DLL_TEMPLATE_CLASS PKCS_DigestDecoration<SHA224>;
48 CRYPTOPP_DLL_TEMPLATE_CLASS PKCS_DigestDecoration<SHA256>;
49 CRYPTOPP_DLL_TEMPLATE_CLASS PKCS_DigestDecoration<SHA384>;
50 CRYPTOPP_DLL_TEMPLATE_CLASS PKCS_DigestDecoration<SHA512>;
51 // http://github.com/weidai11/cryptopp/issues/517
52 CRYPTOPP_DLL_TEMPLATE_CLASS PKCS_DigestDecoration<SHA3_256>;
53 CRYPTOPP_DLL_TEMPLATE_CLASS PKCS_DigestDecoration<SHA3_384>;
54 CRYPTOPP_DLL_TEMPLATE_CLASS PKCS_DigestDecoration<SHA3_512>;
55 #endif
56 
57 // https://github.com/weidai11/cryptopp/issues/300 and
58 // https://github.com/weidai11/cryptopp/issues/533
59 #if defined(__clang__)
60 template<> const byte PKCS_DigestDecoration<SHA1>::decoration[];
61 template<> const unsigned int PKCS_DigestDecoration<SHA1>::length;
62 template<> const byte PKCS_DigestDecoration<SHA224>::decoration[];
63 template<> const unsigned int PKCS_DigestDecoration<SHA224>::length;
64 template<> const byte PKCS_DigestDecoration<SHA256>::decoration[];
65 template<> const unsigned int PKCS_DigestDecoration<SHA256>::length;
66 template<> const byte PKCS_DigestDecoration<SHA384>::decoration[];
67 template<> const unsigned int PKCS_DigestDecoration<SHA384>::length;
68 template<> const byte PKCS_DigestDecoration<SHA512>::decoration[];
69 template<> const unsigned int PKCS_DigestDecoration<SHA512>::length;
70 
71 // http://github.com/weidai11/cryptopp/issues/517
72 template<> const byte PKCS_DigestDecoration<SHA3_256>::decoration[];
73 template<> const unsigned int PKCS_DigestDecoration<SHA3_256>::length;
74 template<> const byte PKCS_DigestDecoration<SHA3_384>::decoration[];
75 template<> const unsigned int PKCS_DigestDecoration<SHA3_384>::length;
76 template<> const byte PKCS_DigestDecoration<SHA3_512>::decoration[];
77 template<> const unsigned int PKCS_DigestDecoration<SHA3_512>::length;
78 
79 template<> const byte PKCS_DigestDecoration<Weak1::MD2>::decoration[];
80 template<> const unsigned int PKCS_DigestDecoration<Weak1::MD2>::length;
81 template<> const byte PKCS_DigestDecoration<Weak1::MD5>::decoration[];
82 template<> const unsigned int PKCS_DigestDecoration<Weak1::MD5>::length;
83 #endif
84 
85 /// \brief PKCS #1 v1.5 Signature Encoding Scheme
86 /// \sa <a href="http://www.weidai.com/scan-mirror/sig.html#sem_PKCS1-1.5">EMSA-PKCS1-v1_5</a>
88 {
89 public:
90  CRYPTOPP_STATIC_CONSTEXPR const char* CRYPTOPP_API StaticAlgorithmName() {return "EMSA-PKCS1-v1_5";}
91 
92  size_t MinRepresentativeBitLength(size_t hashIdentifierSize, size_t digestSize) const
93  {return 8 * (digestSize + hashIdentifierSize + 10);}
94 
95  void ComputeMessageRepresentative(RandomNumberGenerator &rng,
96  const byte *recoverableMessage, size_t recoverableMessageLength,
97  HashTransformation &hash, HashIdentifier hashIdentifier, bool messageEmpty,
98  byte *representative, size_t representativeBitLength) const;
99 
101  {
102  template <class H> struct HashIdentifierLookup2
103  {
104  static HashIdentifier Lookup()
105  {
107  }
108  };
109  };
110 };
111 
112 /// \brief PKCS #1 version 1.5, for use with RSAES and RSASS
113 /// \dontinclude pkcspad.h
114 
116 {
119 };
120 
121 NAMESPACE_END
122 
123 #endif
const char * Pad()
bool
Definition: argnames.h:72
Forward declarations for hash functions used in signature encoding methods.
This file contains helper classes/functions for implementing public key algorithms.
Abstract base classes that provide a uniform interface to this library.
Message encoding method for public key encryption.
Definition: pubkey.h:208
Interface for random number generators.
Definition: cryptlib.h:1327
Base class for public key signature standard classes.
Definition: pubkey.h:2197
PKCS #1 v1.5 Encryption Padding Scheme.
Definition: pkcspad.h:23
Returns a decoding results.
Definition: cryptlib.h:253
Interface for message encoding method for public key signature schemes.
Definition: pubkey.h:391
PKCS #1 version 1.5, for use with RSAES and RSASS .
Definition: pkcspad.h:115
Base class for public key encryption standard classes.
Definition: pubkey.h:2192
PKCS #1 v1.5 Signature Encoding Scheme.
Definition: pkcspad.h:87
Classes for SHA-1 and SHA-2 family of message digests.
Interface for hash functions and data processing part of MACs.
Definition: cryptlib.h:1065
PKCS #1 decoration data structure.
Definition: pkcspad.h:34
Crypto++ library namespace.
Interface for retrieving values given their names.
Definition: cryptlib.h:291