gvpe/src/hkdf.h

/*
    hkdf.h -- RFC 5869 HKDF implementation
    Copyright (C) 2013      Marc Lehmann <gvpe@schmorp.de>
 
    This file is part of GVPE.

    GVPE is free software; you can redistribute it and/or modify it
    under the terms of the GNU General Public License as published by the
    Free Software Foundation; either version 3 of the License, or (at your
    option) any later version.
   
    This program is distributed in the hope that it will be useful, but
    WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General
    Public License for more details.
   
    You should have received a copy of the GNU General Public License along
    with this program; if not, see <http://www.gnu.org/licenses/>.
   
    Additional permission under GNU GPL version 3 section 7
   
    If you modify this Program, or any covered work, by linking or
    combining it with the OpenSSL project's OpenSSL library (or a modified
    version of that library), containing parts covered by the terms of the
    OpenSSL or SSLeay licenses, the licensors of this Program grant you
    additional permission to convey the resulting work.  Corresponding
    Source for a non-source form of such a combination shall include the
    source code for the parts of OpenSSL used as well as that of the
    covered work.
*/

#ifndef HKDF_H__
#define HKDF_H__

#include "global.h"

// see RFC5869
struct hkdf
{
  HMAC_CTX ctx;
  u8 prk[EVP_MAX_MD_SIZE];

  hkdf (const void *salt = 0, int len = 0, const EVP_MD *xtr_hash = EVP_sha512 ());
  ~hkdf ();

  void extract (const void *ikm, int len);
  void extract_done (const EVP_MD *prf_hash = 0);

  void expand (void *okm, int len, const void *info = 0, int infolen = 0);

  static void verify ();
};

#endif

Revision:	1.2
Committed:	Wed Jul 17 04:36:03 2013 UTC (13 years, 2 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.1:	+2 -4 lines
Log Message:	* empty log message *
#	User	Rev	Content
1	root	1.1	/*
2			hkdf.h -- RFC 5869 HKDF implementation
3			Copyright (C) 2013 Marc Lehmann <gvpe@schmorp.de>
4
5			This file is part of GVPE.
6
7			GVPE is free software; you can redistribute it and/or modify it
8			under the terms of the GNU General Public License as published by the
9			Free Software Foundation; either version 3 of the License, or (at your
10			option) any later version.
11
12			This program is distributed in the hope that it will be useful, but
13			WITHOUT ANY WARRANTY; without even the implied warranty of
14			MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
15			Public License for more details.
16
17			You should have received a copy of the GNU General Public License along
18			with this program; if not, see <http://www.gnu.org/licenses/>.
19
20			Additional permission under GNU GPL version 3 section 7
21
22			If you modify this Program, or any covered work, by linking or
23			combining it with the OpenSSL project's OpenSSL library (or a modified
24			version of that library), containing parts covered by the terms of the
25			OpenSSL or SSLeay licenses, the licensors of this Program grant you
26			additional permission to convey the resulting work. Corresponding
27			Source for a non-source form of such a combination shall include the
28			source code for the parts of OpenSSL used as well as that of the
29			covered work.
30			*/
31
32			#ifndef HKDF_H__
33			#define HKDF_H__
34
35			#include "global.h"
36
37			// see RFC5869
38			struct hkdf
39			{
40			HMAC_CTX ctx;
41			u8 prk[EVP_MAX_MD_SIZE];
42
43	root	1.2	hkdf (const void salt = 0, int len = 0, const EVP_MD xtr_hash = EVP_sha512 ());
44	root	1.1	~hkdf ();
45
46			void extract (const void *ikm, int len);
47	root	1.2	void extract_done (const EVP_MD *prf_hash = 0);
48	root	1.1
49			void expand (void okm, int len, const void info = 0, int infolen = 0);
50
51			static void verify ();
52			};
53
54			#endif
55