Automatically Seeded X9.17 RNG.
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| AutoSeededX917RNG (bool blocking=false, bool autoSeed=true) |
| Construct an AutoSeededX917RNG. More...
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void | Reseed (bool blocking=false, const byte *input=NULL, size_t length=0) |
| Reseed an AutoSeededX917RNG. More...
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void | Reseed (const byte *key, size_t keylength, const byte *seed, const byte *timeVector) |
| Deterministically reseed an AutoSeededX917RNG for testing. More...
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bool | CanIncorporateEntropy () const |
| Determines if a generator can accept additional entropy. More...
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void | IncorporateEntropy (const byte *input, size_t length) |
| Update RNG state with additional unpredictable values. More...
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void | GenerateIntoBufferedTransformation (BufferedTransformation &target, const std::string &channel, lword length) |
| Generate random bytes into a BufferedTransformation. More...
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std::string | AlgorithmProvider () const |
| Retrieve the provider of this algorithm. More...
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Public Member Functions inherited from RandomNumberGenerator |
virtual byte | GenerateByte () |
| Generate new random byte and return it. More...
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virtual unsigned int | GenerateBit () |
| Generate new random bit and return it. More...
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virtual word32 | GenerateWord32 (word32 min=0, word32 max=0xffffffffUL) |
| Generate a random 32 bit word in the range min to max, inclusive. More...
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virtual void | GenerateBlock (byte *output, size_t size) |
| Generate random array of bytes. More...
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virtual void | DiscardBytes (size_t n) |
| Generate and discard n bytes. More...
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template<class IT > |
void | Shuffle (IT begin, IT end) |
| Randomly shuffle the specified array. More...
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| Algorithm (bool checkSelfTestStatus=true) |
| Interface for all crypto algorithms. More...
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virtual std::string | AlgorithmName () const |
| Provides the name of this algorithm. More...
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virtual Clonable * | Clone () const |
| Copies this object. More...
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static std::string | StaticAlgorithmName () |
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template<class BLOCK_CIPHER>
class AutoSeededX917RNG< BLOCK_CIPHER >
Automatically Seeded X9.17 RNG.
- Template Parameters
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BLOCK_CIPHER | a block cipher AutoSeededX917RNG is from ANSI X9.17 Appendix C, seeded using an OS provided RNG. If 3-key TripleDES (DES_EDE3) is used, then its a X9.17 conforming generator. If AES is used, then its a X9.31 conforming generator. Though ANSI X9 prescribes 3-key TripleDES, the template parameter BLOCK_CIPHER can be any BlockTransformation derived class. You should reseed the generator after a fork() to avoid multiple generators with the same internal state. |
- See also
- X917RNG, DefaultAutoSeededRNG
Definition at line 190 of file osrng.h.
◆ AutoSeededX917RNG()
template<class BLOCK_CIPHER >
◆ Reseed() [1/2]
template<class BLOCK_CIPHER >
void AutoSeededX917RNG< BLOCK_CIPHER >::Reseed |
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bool |
blocking = false , |
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const byte * |
input = NULL , |
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size_t |
length = 0 |
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Reseed an AutoSeededX917RNG.
- Parameters
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blocking | controls seeding with BlockingRng or NonblockingRng |
input | additional entropy to add to the generator |
length | the size of the additional entropy, in bytes Internally, the generator uses SHA256 to extract the entropy from from the seed and then stretch the material for the block cipher's key and initialization vector. |
Definition at line 244 of file osrng.h.
◆ Reseed() [2/2]
template<class BLOCK_CIPHER >
void AutoSeededX917RNG< BLOCK_CIPHER >::Reseed |
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const byte * |
key, |
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size_t |
keylength, |
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const byte * |
seed, |
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const byte * |
timeVector |
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Deterministically reseed an AutoSeededX917RNG for testing.
- Parameters
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key | the key to use for the deterministic reseeding |
keylength | the size of the key, in bytes |
seed | the seed to use for the deterministic reseeding |
timeVector | a time vector to use for deterministic reseeding This is a testing interface for testing purposes, and should NOT be used in production. |
Definition at line 238 of file osrng.h.
◆ CanIncorporateEntropy()
template<class BLOCK_CIPHER >
◆ IncorporateEntropy()
template<class BLOCK_CIPHER >
void AutoSeededX917RNG< BLOCK_CIPHER >::IncorporateEntropy |
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const byte * |
input, |
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size_t |
length |
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inlinevirtual |
Update RNG state with additional unpredictable values.
- Parameters
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input | the entropy to add to the generator |
length | the size of the input buffer |
- Exceptions
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Reimplemented from RandomNumberGenerator.
Definition at line 227 of file osrng.h.
◆ GenerateIntoBufferedTransformation()
template<class BLOCK_CIPHER >
◆ AlgorithmProvider()
template<class BLOCK_CIPHER >
Retrieve the provider of this algorithm.
- Returns
- the algorithm provider The algorithm provider can be a name like "C++", "SSE", "NEON", "AESNI", "ARMv8" and "Power8". C++ is standard C++ code. Other labels, like SSE, usually indicate a specialized implementation using instructions from a higher instruction set architecture (ISA). Future labels may include external hardware like a hardware security module (HSM). Generally speaking Wei Dai's original IA-32 ASM code falls under "SSE2". Labels like "SSSE3" and "SSE4.1" follow after Wei's code and use intrinsics instead of ASM. Algorithms which combine different instructions or ISAs provide the dominant one. For example on x86
AES/GCM
returns "AESNI" rather than "CLMUL" or "AES+SSE4.1" or "AES+CLMUL" or "AES+SSE4.1+CLMUL".
- Note
- Provider is not universally implemented yet.
- Since
- Crypto++ 8.0
Reimplemented from Algorithm.
Definition at line 274 of file osrng.h.
The documentation for this class was generated from the following file: