Security Scol plugin
rng.h
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1// rng.h - originally written and placed in the public domain by Wei Dai
2
8
9#ifndef CRYPTOPP_RNG_H
10#define CRYPTOPP_RNG_H
11
12#include "cryptlib.h"
13#include "filters.h"
14#include "smartptr.h"
15
16NAMESPACE_BEGIN(CryptoPP)
17
18
23{
24public:
27 LC_RNG(word32 init_seed)
28 : seed(init_seed) {}
29
30 void GenerateBlock(byte *output, size_t size);
31
32 word32 GetSeed() {return seed;}
33
34private:
35 word32 seed;
36
37 static const word32 m;
38 static const word32 q;
39 static const word16 a;
40 static const word16 r;
41};
42
49class CRYPTOPP_DLL X917RNG : public RandomNumberGenerator, public NotCopyable
50{
51public:
68 X917RNG(BlockTransformation *cipher, const byte *seed, const byte *deterministicTimeVector = NULLPTR);
69
70 void GenerateIntoBufferedTransformation(BufferedTransformation &target, const std::string &channel, lword size);
71
72private:
74 const unsigned int m_size; // S, blocksize of cipher
75 SecByteBlock m_datetime; // DT, buffer for enciphered timestamp
76 SecByteBlock m_randseed, m_lastBlock, m_deterministicTimeVector;
77};
78
84class MaurerRandomnessTest : public Bufferless<Sink>
85{
86public:
89
90 size_t Put2(const byte *inString, size_t length, int messageEnd, bool blocking);
91
94 // BytesNeeded() returns how many more bytes of input is needed by the test
95 // GetTestValue() should not be called before BytesNeeded()==0
96 unsigned int BytesNeeded() const {return n >= (Q+K) ? 0 : Q+K-n;}
97
98 // returns a number between 0.0 and 1.0, describing the quality of the
99 // random numbers entered
100 double GetTestValue() const;
101
102private:
103 enum {L=8, V=256, Q=2000, K=2000};
104 double sum;
105 unsigned int n;
106 unsigned int tab[V];
107};
108
109NAMESPACE_END
110
111#endif
Interface for the data processing part of block ciphers.
Definition cryptlib.h:856
Interface for buffered transformations.
Definition cryptlib.h:1652
Base class for bufferless filters.
Definition simple.h:120
Linear Congruential Generator (LCG)
Definition rng.h:23
LC_RNG(word32 init_seed)
Construct a Linear Congruential Generator (LCG)
Definition rng.h:27
Maurer's Universal Statistical Test for Random Bit Generators.
Definition rng.h:85
MaurerRandomnessTest()
Construct a MaurerRandomnessTest.
Definition rng.cpp:135
unsigned int BytesNeeded() const
Provides the number of bytes of input is needed by the test.
Definition rng.h:96
size_t Put2(const byte *inString, size_t length, int messageEnd, bool blocking)
Input multiple bytes for processing.
Definition rng.cpp:142
Ensures an object is not copyable.
Definition misc.h:239
Interface for random number generators.
Definition cryptlib.h:1435
virtual void GenerateIntoBufferedTransformation(BufferedTransformation &target, const std::string &channel, lword length)
Generate random bytes into a BufferedTransformation.
Definition cryptlib.cpp:324
ANSI X9.17 RNG.
Definition rng.h:50
Pointer that overloads operator ->
Definition smartptr.h:38
unsigned int word32
32-bit unsigned datatype
Definition config_int.h:62
unsigned short word16
16-bit unsigned datatype
Definition config_int.h:59
word64 lword
Large word type.
Definition config_int.h:158
Abstract base classes that provide a uniform interface to this library.
Implementation of BufferedTransformation's attachment interface.
Classes for automatic resource management.