Automatically Seeded Randomness Pool. More...
Public Member Functions | |
AutoSeededRandomPool (bool blocking=false, unsigned int seedSize=32) | |
Construct an AutoSeededRandomPool. | |
void | Reseed (bool blocking=false, unsigned int seedSize=32) |
Reseed an AutoSeededRandomPool. | |
bool | CanIncorporateEntropy () const |
Determines if a generator can accept additional entropy. | |
void | IncorporateEntropy (const byte *input, size_t length) |
Update RNG state with additional unpredictable values. | |
void | GenerateIntoBufferedTransformation (BufferedTransformation &target, const std::string &channel, lword size) |
Generate random bytes into a BufferedTransformation. | |
void | Put (const byte *input, size_t length) |
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 | GenerateBlock (byte *output, size_t size) |
Generate random array of bytes. | |
virtual void | DiscardBytes (size_t n) |
Generate and discard n bytes. | |
template<class IT > | |
void | Shuffle (IT begin, IT end) |
Randomly shuffle the specified array. | |
virtual std::string | AlgorithmName () const |
Provides the name of this algorithm. | |
virtual Clonable * | Clone () const |
Copies this object. |
Automatically Seeded Randomness Pool.
This class seeds itself using an operating system provided RNG.
Definition at line 140 of file osrng.h.
AutoSeededRandomPool::AutoSeededRandomPool | ( | bool | blocking = false , |
|
unsigned int | seedSize = 32 | |||
) | [inline, explicit] |
Construct an AutoSeededRandomPool.
blocking | controls seeding with BlockingRng or NonblockingRng | |
seedSize | the size of the seed, in bytes |
Use blocking to choose seeding with BlockingRng or NonblockingRng. The parameter is ignored if only one of these is available.
void AutoSeededRandomPool::Reseed | ( | bool | blocking = false , |
|
unsigned int | seedSize = 32 | |||
) |
Reseed an AutoSeededRandomPool.
blocking | controls seeding with BlockingRng or NonblockingRng | |
seedSize | the size of the seed, in bytes |
Definition at line 181 of file osrng.cpp.
References RandomPool::IncorporateEntropy().
bool RandomPool::CanIncorporateEntropy | ( | ) | const [inline, virtual, inherited] |
Determines if a generator can accept additional entropy.
Reimplemented from RandomNumberGenerator.
Definition at line 20 of file randpool.h.
void RandomPool::IncorporateEntropy | ( | const byte * | input, | |
size_t | length | |||
) | [virtual, inherited] |
Update RNG state with additional unpredictable values.
input | the entropy to add to the generator | |
length | the size of the input buffer |
NotImplemented |
A generator may or may not accept additional entropy. Call CanIncorporateEntropy() to test for the ability to use additional entropy.
If a derived class does not override IncorporateEntropy(), then the base class throws NotImplemented.
Reimplemented from RandomNumberGenerator.
Definition at line 26 of file randpool.cpp.
References HashTransformation::Final().
Referenced by Reseed().
void RandomPool::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 from RandomNumberGenerator.
Definition at line 35 of file randpool.cpp.
References BufferedTransformation::ChannelPut(), CRYPTOPP_COMPILE_ASSERT, SecBlock< T, A >::data(), SecBlock< T, A >::size(), and UnsignedMin().
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::GenerateBlock | ( | byte * | output, | |
size_t | size | |||
) | [virtual, inherited] |
Generate random array of bytes.
output | the byte buffer | |
size | the length of the buffer, in bytes |
All generated values are uniformly distributed over the range specified within the the contraints of a particular generator.
Reimplemented in Weak1::ARC4_Base, PublicBlumBlumShub, ClassNullRNG, KDF2_RNG, MersenneTwister< K, M, N, F, S >, NonblockingRng, BlockingRng, RDRAND, RDSEED, LC_RNG, AdditiveCipherTemplate< BASE >, FixedRNG, and AdditiveCipherTemplate< AbstractPolicyHolder< AdditiveCipherAbstractPolicy, CTR_ModePolicy > >.
Definition at line 329 of file cryptlib.cpp.
References RandomNumberGenerator::GenerateIntoBufferedTransformation().
Referenced by RandomNumberGenerator::GenerateByte(), RandomNumberGenerator::GenerateIntoBufferedTransformation(), RandomNumberGenerator::GenerateWord32(), SimpleKeyingInterface::GetNextIV(), Integer::Randomize(), and X917RNG::X917RNG().
void RandomNumberGenerator::DiscardBytes | ( | size_t | n | ) | [virtual, inherited] |
Generate and discard n bytes.
n | the number of bytes to generate and discard |
Reimplemented in Weak1::ARC4_Base, ClassNullRNG, MersenneTwister< K, M, N, F, S >, RDRAND, and RDSEED.
Definition at line 342 of file cryptlib.cpp.
References RandomNumberGenerator::GenerateIntoBufferedTransformation().
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 std::string Algorithm::AlgorithmName | ( | ) | const [inline, virtual, inherited] |
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 in Adler32, CCM_Base, CRC32, ClassNullRNG, AuthenticatedSymmetricCipher, DH_Domain< GROUP_PARAMETERS, COFACTOR_OPTION >, EAX_Base, StreamTransformationFilter, HashFilter, HashVerificationFilter, AuthenticatedDecryptionFilter, SignerFilter, SignatureVerificationFilter, GCM_Base, HMAC< T >, RDRAND, RDSEED, SHA3, BitBucket, and VMAC_Base.
Definition at line 488 of file cryptlib.h.
Referenced by BufferedTransformation::ChannelCreatePutSpace(), BufferedTransformation::ChannelFlush(), BufferedTransformation::ChannelMessageSeriesEnd(), BufferedTransformation::ChannelPut2(), TF_DecryptorBase::Decrypt(), TF_EncryptorBase::Encrypt(), StreamTransformation::ProcessLastBlock(), and PK_DefaultDecryptionFilter::Put2().
virtual Clonable* Clonable::Clone | ( | ) | const [inline, virtual, inherited] |
Copies this object.
NotImplemented |
Definition at line 464 of file cryptlib.h.