sph_md2.h File Reference

#include <stddef.h>
#include "sph_types.h"

Go to the source code of this file.

Data Structures

struct  sph_md2_context

Defines

#define SPH_SIZE_md2   128

Functions

void sph_md2_init (void *cc)
void sph_md2 (void *cc, const void *data, size_t len)
void sph_md2_close (void *cc, void *dst)

Detailed Description

MD2 interface.

MD2 is described in RFC 1319. Note: RFC 1319 contains both pseudo-code for the algorithm, and a C implementation. The pseudo-code is erroneous; an errata is available on: http://www.rfc-editor.org/errata.html . This implementation is compatible with the corrected MD2 and the C reference implementation.

Warning:
A theoretical attack on MD2 has been published, which finds a second preimage with work factor 2^104, instead of the 2^128 which a good hash function with 128-bit output should feature. Use only with care.

==========================(LICENSE BEGIN)============================

Copyright (c) 2007-2010 Projet RNRT SAPHIR

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

===========================(LICENSE END)=============================

Author:
Thomas Pornin <thomas.pornin@cryptolog.com>

Define Documentation

#define SPH_SIZE_md2   128

Output size (in bits) for MD2.


Function Documentation

void sph_md2_init ( void *  cc  ) 

Initialize a MD2 context. This process performs no memory allocation.

Parameters:
cc the MD2 context (pointer to a sph_md2_context)
void sph_md2 ( void *  cc,
const void *  data,
size_t  len 
)

Process some data bytes. It is acceptable that len is zero (in which case this function does nothing).

Parameters:
cc the MD2 context
data the input data
len the input data length (in bytes)
void sph_md2_close ( void *  cc,
void *  dst 
)

Terminate the current MD2 computation and output the result into the provided buffer. The destination buffer must be wide enough to accomodate the result (16 bytes). The context is automatically reinitialized.

Parameters:
cc the MD2 context
dst the destination buffer
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