Crypto++
5.6.3
Free C++ class library of cryptographic schemes
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Hardware generated random numbers using RDRAND instruction. More...
Public Member Functions | |
std::string | AlgorithmName () const |
Provides the name of this algorithm. More... | |
RDRAND (unsigned int retries=8) | |
Construct a RDRAND generator. More... | |
unsigned int | GetRetries () const |
Retrieve the number of retries used by the generator. More... | |
void | SetRetries (unsigned int retries) |
Set the number of retries used by the generator. More... | |
virtual void | GenerateBlock (byte *output, size_t size) |
Generate random array of bytes. More... | |
virtual void | DiscardBytes (size_t n) |
Generate and discard n bytes. More... | |
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... | |
template<class IT > | |
void | Shuffle (IT begin, IT end) |
Randomly shuffle the specified array. More... | |
virtual Clonable * | Clone () const |
Copies this object. More... | |
Hardware generated random numbers using RDRAND instruction.
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inline |
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inlinevirtual |
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.
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inline |
Retrieve the number of retries used by the generator.
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inline |
Set the number of retries used by the generator.
retries | number of times GenerateBlock() will attempt to recover from a failed generation |
Definition at line 59 of file rdrand.h.
References GenerateBlock().
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inlinevirtual |
Generate random array of bytes.
output | the byte buffer |
size | the length of the buffer, in bytes |
Reimplemented from RandomNumberGenerator.
Definition at line 70 of file rdrand.h.
References DiscardBytes().
Referenced by SetRetries(), and RDSEED::SetRetries().
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inlinevirtual |
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.
Definition at line 84 of file rdrand.h.
Referenced by GenerateBlock(), and RDSEED::GenerateBlock().
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inlinevirtual |
Update RNG state with additional unpredictable values.
input | unused |
length | unused |
The operation is a nop for this generator.
Reimplemented from RandomNumberGenerator.
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inlinevirtualinherited |
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().
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virtualinherited |
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 ClassNullRNG, and PublicBlumBlumShub.
Definition at line 294 of file cryptlib.cpp.
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virtualinherited |
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 ClassNullRNG, and PublicBlumBlumShub.
Definition at line 289 of file cryptlib.cpp.
Referenced by TestDataNameValuePairs::GetVoidValue().
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virtualinherited |
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(), and Crop().
Referenced by MaurerProvablePrime(), PKCS_EncryptionPaddingScheme::MaxUnpaddedLength(), MihailescuProvablePrime(), and FilterTester::Put2().
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virtualinherited |
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 >, X917RNG, and RandomPool.
Definition at line 347 of file cryptlib.cpp.
References BufferedTransformation::ChannelPut(), SecBlock< T, A >::size(), and UnsignedMin().
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inlineinherited |
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.
Definition at line 1159 of file cryptlib.h.
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inlinevirtualinherited |
Copies this object.
NotImplemented |
Definition at line 464 of file cryptlib.h.