LSH-224 and LSH-256 hash base class. More...
#include <lsh.h>
Inheritance diagram for LSH256_Base:
Public Member Functions | |
| unsigned int | BlockSize () const |
| Provides the block size of the compression function. | |
| unsigned int | DigestSize () const |
| Provides the digest size of the hash. | |
| unsigned int | OptimalDataAlignment () const |
| Provides input and output data alignment for optimal performance. | |
| void | Restart () |
| Restart the hash. | |
| void | Update (const byte *input, size_t size) |
| Updates a hash with additional input. | |
| void | TruncatedFinal (byte *hash, size_t size) |
| Computes the hash of the current message. | |
| std::string | AlgorithmProvider () const |
| Retrieve the provider of this algorithm. | |
| Public Member Functions inherited from HashTransformation | |
| HashTransformation & | Ref () |
| Provides a reference to this object. | |
| virtual byte * | CreateUpdateSpace (size_t &size) |
| Request space which can be written into by the caller. | |
| virtual void | Final (byte *digest) |
| Computes the hash of the current message. | |
| unsigned int | TagSize () const |
| Provides the tag size of the hash. | |
| virtual unsigned int | OptimalBlockSize () const |
| Provides the input block size most efficient for this hash. | |
| virtual void | CalculateDigest (byte *digest, const byte *input, size_t length) |
| Updates the hash with additional input and computes the hash of the current message. | |
| virtual bool | Verify (const byte *digest) |
| Verifies the hash of the current message. | |
| virtual bool | VerifyDigest (const byte *digest, const byte *input, size_t length) |
| Updates the hash with additional input and verifies the hash of the current message. | |
| virtual void | CalculateTruncatedDigest (byte *digest, size_t digestSize, const byte *input, size_t length) |
| Updates the hash with additional input and computes the hash of the current message. | |
| virtual bool | TruncatedVerify (const byte *digest, size_t digestLength) |
| Verifies the hash of the current message. | |
| virtual bool | VerifyTruncatedDigest (const byte *digest, size_t digestLength, const byte *input, size_t length) |
| Updates the hash with additional input and verifies the hash of the current message. | |
| Public Member Functions inherited from Algorithm | |
| Algorithm (bool checkSelfTestStatus=true) | |
| Interface for all crypto algorithms. | |
| virtual std::string | AlgorithmName () const |
| Provides the name of this algorithm. | |
| Public Member Functions inherited from Clonable | |
| virtual Clonable * | Clone () const |
| Copies this object. | |
Static Public Attributes | |
| static const int | BLOCKSIZE = 128 |
| Block size, in bytes. | |
Detailed Description
LSH-224 and LSH-256 hash base class.
LSH256_Base is the base class for both LSH-224 and LSH-256
- Since
- Crypto++ 8.6
Constructor & Destructor Documentation
◆ ~LSH256_Base()
Member Function Documentation
◆ BlockSize()
|
inlinevirtual |
Provides the block size of the compression function.
- Returns
- block size of the compression function, in bytes
BlockSize() will return 0 if the hash is not block based or does not have an equivalent block size. For example, Keccak and SHA-3 do not have a block size, but they do have an equivalent block size called rate expressed as r.
Reimplemented from HashTransformation.
◆ DigestSize()
|
inlinevirtual |
Provides the digest size of the hash.
- Returns
- the digest size of the hash.
Implements HashTransformation.
◆ OptimalDataAlignment()
|
inlinevirtual |
Provides input and output data alignment for optimal performance.
- Returns
- the input data alignment that provides optimal performance
- See also
- GetAlignment() and OptimalBlockSize()
Reimplemented from HashTransformation.
◆ Restart()
|
virtual |
Restart the hash.
Discards the current state, and restart for a new message
Reimplemented from HashTransformation.
◆ Update()
|
virtual |
Updates a hash with additional input.
- Parameters
-
input the additional input as a buffer length the size of the buffer, in bytes
Implements HashTransformation.
◆ TruncatedFinal()
|
virtual |
Computes the hash of the current message.
- Parameters
-
digest a pointer to the buffer to receive the hash digestSize the size of the truncated digest, in bytes
TruncatedFinal() calls Final() and then copies digestSize bytes to digest. The hash is restarted the hash for the next message.
- Precondition
COUNTOF(digest) <= DigestSize()orCOUNTOF(digest) <= HASH::DIGESTSIZEensures the output byte buffer is a valid size.
Implements HashTransformation.
◆ AlgorithmProvider()
|
virtual |
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.
Member Data Documentation
◆ BLOCKSIZE
|
static |
The documentation for this class was generated from the following file:
