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# SHA Class Reference

`#include <sha.h>`

Inheritance diagram for SHA:

List of all members.

## Detailed Description

SHA-1

Definition at line 9 of file sha.h.

## Public Types
enum | { DIGESTSIZE = 20 }
typedef BigEndian | ByteOrderClass
typedef IteratedHashBase< word32, HashTransformation >::HashWordType | HashWordType
## Public Member Functions
std::string | AlgorithmName () const
void | TruncatedFinal (byte *hash, unsigned int size)
| truncated version of Final()
unsigned int | DigestSize () const
unsigned int | OptimalBlockSize () const
void | Update (const byte *input, unsigned int length)
byte * | CreateUpdateSpace (unsigned int &size)
void | Restart ()
virtual void | Final (byte *digest)
| compute hash for current message, then restart for a new message
virtual void | CalculateDigest (byte *digest, const byte *input, unsigned int 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, unsigned int 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, unsigned int digestSize, const byte *input, unsigned int length)
| truncated version of CalculateDigest()
virtual bool | TruncatedVerify (const byte *digest, unsigned int digestLength)
| truncated version of Verify()
virtual bool | VerifyTruncatedDigest (const byte *digest, unsigned int digestLength, const byte *input, unsigned int length)
| truncated version of VerifyDigest()
virtual Clonable * | Clone () const
| this is not implemented by most classes yet
## Static Public Member Functions
void | Transform (word32 *digest, const word32 *data)
const char * | StaticAlgorithmName ()
void | CorrectEndianess (HashWordType *out, const HashWordType *in, unsigned int byteCount)
## Protected Member Functions
void | Init ()
void | vTransform (const word32 *data)
virtual void | vTransform (const HashWordType *data)=0
unsigned int | BlockSize () const
| block size of underlying compression function, or 0 if not block based
void | HashBlock (const HashWordType *input)
virtual void | HashBlock (const word32 *input)=0
word32 | GetBitCountHi () const
word32 | GetBitCountLo () const
virtual unsigned int | HashMultipleBlocks (const word32 *input, unsigned int length)
void | PadLastBlock (unsigned int lastBlockSize, byte padFirst=0x80)
void | ThrowIfInvalidTruncatedSize (unsigned int size) const
## Protected Attributes
SecBlock< word32 > | m_data
SecBlock< word32 > | m_digest

## Member Function Documentation

virtual void HashTransformation::Final | ( | byte * | digest | ) | `[inline, virtual, inherited]`

| compute hash for current message, then restart for a new message Precondition: size of digest == DigestSize(). Reimplemented in PKCS_DecoratedHashModule< H >, SignatureEncodingMethodWithRecovery, and EMSA2DecoratedHashModule< H >. Definition at line 526 of file cryptlib.h. Referenced by HashFilter::Put2(), PK_SignerBase< H >::SignAndRestart(), and PK_VerifierBase< H >::VerifyAndRestart().

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. Reimplemented in SignatureEncodingMethodWithRecovery. Definition at line 549 of file cryptlib.h. Referenced by VerifierWithRecoveryTemplate< TF, H >::VerifyAndRestart().

The documentation for this class was generated from the following files:

- sha.h
- sha.cpp