Classes for SipHash message authentication code. More...

#include "cryptlib.h"
#include "secblock.h"
#include "misc.h"

Include dependency graph for siphash.h:

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Classes
class	SipHash_Info< T_128bit >
	SipHash message authentication code information. More...

class	SipHash_Base< C, D, T_128bit >
	SipHash message authentication code base class. More...

class	SipHash< C, D, T_128bit >
	SipHash message authentication code. More...

Detailed Description

Classes for SipHash message authentication code.

SipHash computes a 64-bit or 128-bit message authentication code from a variable-length message and 128-bit secret key. It was designed to be efficient even for short inputs, with performance comparable to non-cryptographic hash functions.

To create a SipHash-2-4 object with a 64-bit MAC use code similar to the following.

  SecByteBlock key(16);
  prng.GenerateBlock(key, key.size());

  SipHash<2,4,false> hash(key, key.size());
  hash.Update(...);
  hash.Final(...);

To create a SipHash-2-4 object with a 128-bit MAC use code similar to the following.

  SecByteBlock key(16);
  prng.GenerateBlock(key, key.size());

  SipHash<2,4,true> hash(key, key.size());
  hash.Update(...);
  hash.Final(...);

See also: Jean-Philippe Aumasson and Daniel J. Bernstein SipHash: a fast short-input PRF

Since: Crypto++ 5.7

Definition in file siphash.h.