Crypto++ 8.1 Free C++ class library of cryptographic schemes

Public Member Functions | Static Public Member Functions | List of all members
BlockingRng Class Reference

Wrapper class for /dev/random and /dev/srandom. More...

Inheritance diagram for BlockingRng:

## Public Member Functions
| BlockingRng ()
| Construct a BlockingRng.
void | GenerateBlock (byte *output, size_t size)
| Generate random array of bytes. More...
Public Member Functions inherited from RandomNumberGenerator
virtual void | IncorporateEntropy (const byte *input, size_t length)
| Update RNG state with additional unpredictable values. More...
virtual bool | CanIncorporateEntropy () const
| Determines if a generator can accept additional entropy. More...
virtual byte | GenerateByte ()
| Generate new random byte and return it. More...
virtual unsigned int | GenerateBit ()
| Generate new random bit and return it. More...
virtual word32 | GenerateWord32 (word32 min=0, word32 max=0xffffffffUL)
| Generate a random 32 bit word in the range min to max, inclusive. More...
virtual void | GenerateIntoBufferedTransformation (BufferedTransformation &target, const std::string &channel, lword length)
| Generate random bytes into a BufferedTransformation. More...
virtual void | DiscardBytes (size_t n)
| Generate and discard n bytes. More...
template<class IT >
void | Shuffle (IT begin, IT end)
| Randomly shuffle the specified array. More...
Public Member Functions inherited from Algorithm
| Algorithm (bool checkSelfTestStatus=true)
| Interface for all crypto algorithms. More...
virtual std::string | AlgorithmName () const
| Provides the name of this algorithm. More...
virtual std::string | AlgorithmProvider () const
| Retrieve the provider of this algorithm. More...
Public Member Functions inherited from Clonable
virtual Clonable * | Clone () const
| Copies this object. More...

## Static Public Member Functions
static const char * | StaticAlgorithmName ()

## Detailed Description

Wrapper class for /dev/random and /dev/srandom.

Encapsulates /dev/random on Linux, OS X and Unix; and /dev/srandom on the BSDs.

Note
  On Linux the /dev/random interface is effectively deprecated. According to the Kernel Crypto developers, /dev/urandom or getrandom(2) should be used instead. Also see [RFC PATCH v12 3/4] Linux Random Number Generator on the kernel-crypto mailing list.

Definition at line 118 of file osrng.h.

## Member Function Documentation

## ◆ GenerateBlock()

void BlockingRng::GenerateBlock | ( | byte * | output,
|  | size_t | size
| ) |  |
| virtual

Generate random array of bytes.

Parameters

  output | the byte buffer
  size | the length of the buffer, in bytes

GenerateIntoBufferedTransformation() calls are routed to GenerateBlock().

Reimplemented from RandomNumberGenerator.

Definition at line 209 of file osrng.cpp.

The documentation for this class was generated from the following files:

- osrng.h
- osrng.cpp