#include <crc.h>
Inheritance diagram for CRC32:
Definition at line 19 of file crc.h.
Public Member Functions | |
| CRC32 () | |
| void | Update (const byte *input, size_t length) |
| process more input | |
| void | TruncatedFinal (byte *hash, size_t size) |
| truncated version of Final() | |
| unsigned int | DigestSize () const |
| size of the hash returned by Final() | |
| std::string | AlgorithmName () const |
| returns name of this algorithm, not universally implemented yet | |
| void | UpdateByte (byte b) |
| byte | GetCrcByte (size_t i) const |
| HashTransformation & | Ref () |
| return a reference to this object, | |
| virtual byte * | CreateUpdateSpace (size_t &size) |
| request space to write input into | |
| virtual void | Final (byte *digest) |
| compute hash for current message, then restart for a new message | |
| virtual void | Restart () |
| discard the current state, and restart with a new message | |
| virtual unsigned int | BlockSize () const |
| block size of underlying compression function, or 0 if not block based | |
| virtual unsigned int | OptimalBlockSize () const |
| input to Update() should have length a multiple of this for optimal speed | |
| virtual unsigned int | OptimalDataAlignment () const |
| returns how input should be aligned for optimal performance | |
| virtual void | CalculateDigest (byte *digest, const byte *input, size_t length) |
| use this if your input is in one piece and you don't want to call Update() and Final() separately | |
| virtual bool | Verify (const byte *digest) |
| verify that digest is a valid digest for the current message, then reinitialize the object | |
| virtual bool | VerifyDigest (const byte *digest, const byte *input, size_t length) |
| use this if your input is in one piece and you don't want to call Update() and Verify() separately | |
| virtual void | CalculateTruncatedDigest (byte *digest, size_t digestSize, const byte *input, size_t length) |
| truncated version of CalculateDigest() | |
| virtual bool | TruncatedVerify (const byte *digest, size_t digestLength) |
| truncated version of Verify() | |
| virtual bool | VerifyTruncatedDigest (const byte *digest, size_t digestLength, const byte *input, size_t length) |
| truncated version of VerifyDigest() | |
| virtual Clonable * | Clone () const |
| this is not implemented by most classes yet | |
Static Public Attributes | |
| static const int | DIGESTSIZE = 4 |
Protected Member Functions | |
| void | ThrowIfInvalidTruncatedSize (size_t size) const |
| HashTransformation& HashTransformation::Ref | ( | ) | [inline, inherited] |
return a reference to this object,
This function is useful for passing a temporary HashTransformation object to a function that takes a non-const reference.
Definition at line 533 of file cryptlib.h.
| virtual void HashTransformation::Final | ( | byte * | digest | ) | [inline, virtual, inherited] |
compute hash for current message, then restart for a new message
Definition at line 543 of file cryptlib.h.
Referenced by PSSR_MEM_Base::ComputeMessageRepresentative(), PKCS1v15_SignatureMessageEncodingMethod::ComputeMessageRepresentative(), EMSA5Pad< T >::ComputeMessageRepresentative(), PKCS5_PBKDF2_HMAC< T >::DeriveKey(), DefaultEncryptor::FirstPut(), RandomPool::IncorporateEntropy(), PSSR_MEM_Base::RecoverMessageFromRepresentative(), HMAC_Base::TruncatedFinal(), ZlibCompressor::WritePoststreamTail(), and Gzip::WritePoststreamTail().
| virtual bool HashTransformation::Verify | ( | const byte * | digest | ) | [inline, virtual, inherited] |
verify that digest is a valid digest for the current message, then reinitialize the object
Default implementation is to call Final() and do a bitwise comparison between its output and digest.
Definition at line 569 of file cryptlib.h.
Referenced by HashVerificationFilter::LastPut(), Gunzip::ProcessPoststreamTail(), and PSSR_MEM_Base::RecoverMessageFromRepresentative().
1.5.2