Hardware generated random numbers using RDRAND instruction. More...
Public Member Functions | |
std::string | AlgorithmName () const |
Provides the name of this algorithm. | |
RDRAND (unsigned int retries=8) | |
Construct a RDRAND generator. | |
unsigned int | GetRetries () const |
Retrieve the number of retries used by the generator. | |
void | SetRetries (unsigned int retries) |
Set the number of retries used by the generator. | |
virtual void | GenerateBlock (byte *output, size_t size) |
Generate random array of bytes. | |
virtual void | DiscardBytes (size_t n) |
Generate and discard n bytes. | |
virtual void | IncorporateEntropy (const byte *input, size_t length) |
Update RNG state with additional unpredictable values. | |
virtual bool | CanIncorporateEntropy () const |
Determines if a generator can accept additional entropy. | |
virtual byte | GenerateByte () |
Generate new random byte and return it. | |
virtual unsigned int | GenerateBit () |
Generate new random bit and return it. | |
virtual word32 | GenerateWord32 (word32 min=0, word32 max=0xffffffffUL) |
Generate a random 32 bit word in the range min to max, inclusive. | |
virtual void | GenerateIntoBufferedTransformation (BufferedTransformation &target, const std::string &channel, lword length) |
Generate random bytes into a BufferedTransformation. | |
template<class IT > | |
void | Shuffle (IT begin, IT end) |
Randomly shuffle the specified array. | |
virtual Clonable * | Clone () const |
Copies this object. |
Hardware generated random numbers using RDRAND instruction.
Definition at line 37 of file rdrand.h.
RDRAND::RDRAND | ( | unsigned int | retries = 8 |
) | [inline] |
std::string RDRAND::AlgorithmName | ( | ) | const [inline, virtual] |
Provides the name of this algorithm.
The standard algorithm name can be a name like AES or AES/GCM. Some algorithms do not have standard names yet. For example, there is no standard algorithm name for Shoup's ECIES.
Reimplemented from Algorithm.
unsigned int RDRAND::GetRetries | ( | ) | const [inline] |
Retrieve the number of retries used by the generator.
void RDRAND::SetRetries | ( | unsigned int | retries | ) | [inline] |
Set the number of retries used by the generator.
retries | number of times GenerateBlock() will attempt to recover from a failed generation |
virtual void RDRAND::GenerateBlock | ( | byte * | output, | |
size_t | size | |||
) | [inline, virtual] |
Generate random array of bytes.
output | the byte buffer | |
size | the length of the buffer, in bytes |
Reimplemented from RandomNumberGenerator.
virtual void RDRAND::DiscardBytes | ( | size_t | n | ) | [inline, virtual] |
Generate and discard n bytes.
n | the number of bytes to generate and discard |
the RDSEED generator discards words, not bytes. If n is not a multiple of a machine word, then it is rounded up to that size.
Reimplemented from RandomNumberGenerator.
virtual void RDRAND::IncorporateEntropy | ( | const byte * | input, | |
size_t | length | |||
) | [inline, virtual] |
Update RNG state with additional unpredictable values.
input | unused | |
length | unused |
The operation is a nop for this generator.
Reimplemented from RandomNumberGenerator.
virtual bool RandomNumberGenerator::CanIncorporateEntropy | ( | ) | const [inline, virtual, inherited] |
Determines if a generator can accept additional entropy.
Reimplemented in ClassNullRNG, AutoSeededX917RNG< BLOCK_CIPHER >, and RandomPool.
Definition at line 1104 of file cryptlib.h.
Referenced by DL_SignerBase< SCHEME_OPTIONS::Element >::SignAndRestart().
byte RandomNumberGenerator::GenerateByte | ( | ) | [virtual, inherited] |
Generate new random byte and return it.
Default implementation calls GenerateBlock() with one byte.
All generated values are uniformly distributed over the range specified within the the contraints of a particular generator.
Reimplemented in PublicBlumBlumShub, and ClassNullRNG.
Definition at line 294 of file cryptlib.cpp.
References RandomNumberGenerator::GenerateBlock().
Referenced by RandomNumberGenerator::GenerateBit().
unsigned int RandomNumberGenerator::GenerateBit | ( | ) | [virtual, inherited] |
Generate new random bit and return it.
The default implementation calls GenerateByte() and return its lowest bit.
All generated values are uniformly distributed over the range specified within the the contraints of a particular generator.
Reimplemented in PublicBlumBlumShub, and ClassNullRNG.
Definition at line 289 of file cryptlib.cpp.
References RandomNumberGenerator::GenerateByte().
word32 RandomNumberGenerator::GenerateWord32 | ( | word32 | min = 0 , |
|
word32 | max = 0xffffffffUL | |||
) | [virtual, inherited] |
Generate a random 32 bit word in the range min to max, inclusive.
min | the lower bound of the range | |
max | the upper bound of the range |
The default implementation calls Crop() on the difference between max and min, and then returns the result added to min.
All generated values are uniformly distributed over the range specified within the the contraints of a particular generator.
Reimplemented in ClassNullRNG, and MersenneTwister< K, M, N, F, S >.
Definition at line 301 of file cryptlib.cpp.
References BitPrecision(), Crop(), and RandomNumberGenerator::GenerateBlock().
Referenced by MaurerProvablePrime(), and MihailescuProvablePrime().
void RandomNumberGenerator::GenerateIntoBufferedTransformation | ( | BufferedTransformation & | target, | |
const std::string & | channel, | |||
lword | length | |||
) | [virtual, inherited] |
Generate random bytes into a BufferedTransformation.
target | the BufferedTransformation object which receives the bytes | |
channel | the channel on which the bytes should be pumped | |
length | the number of bytes to generate |
The default implementation calls GenerateBlock() and pumps the result into the DEFAULT_CHANNEL of the target.
All generated values are uniformly distributed over the range specified within the the contraints of a particular generator.
Reimplemented in ClassNullRNG, AutoSeededX917RNG< BLOCK_CIPHER >, RandomPool, and X917RNG.
Definition at line 347 of file cryptlib.cpp.
References BufferedTransformation::ChannelPut(), RandomNumberGenerator::GenerateBlock(), SecBlock< T, A >::size(), and UnsignedMin().
Referenced by RandomNumberGenerator::DiscardBytes(), and RandomNumberGenerator::GenerateBlock().
void RandomNumberGenerator::Shuffle | ( | IT | begin, | |
IT | end | |||
) | [inline, inherited] |
Randomly shuffle the specified array.
begin | an iterator to the first element in the array | |
end | an iterator beyond the last element in the array |
The resulting permutation is uniformly distributed.
Reimplemented in ClassNullRNG.
Definition at line 1159 of file cryptlib.h.
virtual Clonable* Clonable::Clone | ( | ) | const [inline, virtual, inherited] |
Copies this object.
NotImplemented |
Definition at line 464 of file cryptlib.h.