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/* |
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hkdf.h -- RFC 5869 HKDF implementation |
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Copyright (C) 2013,2016 Marc Lehmann <gvpe@schmorp.de> |
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|
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This file is part of GVPE. |
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|
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GVPE is free software; you can redistribute it and/or modify it |
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under the terms of the GNU General Public License as published by the |
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Free Software Foundation; either version 3 of the License, or (at your |
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option) any later version. |
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|
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This program is distributed in the hope that it will be useful, but |
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WITHOUT ANY WARRANTY; without even the implied warranty of |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General |
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Public License for more details. |
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|
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You should have received a copy of the GNU General Public License along |
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with this program; if not, see <http://www.gnu.org/licenses/>. |
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|
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Additional permission under GNU GPL version 3 section 7 |
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|
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If you modify this Program, or any covered work, by linking or |
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combining it with the OpenSSL project's OpenSSL library (or a modified |
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version of that library), containing parts covered by the terms of the |
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OpenSSL or SSLeay licenses, the licensors of this Program grant you |
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additional permission to convey the resulting work. Corresponding |
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Source for a non-source form of such a combination shall include the |
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source code for the parts of OpenSSL used as well as that of the |
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covered work. |
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*/ |
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#ifndef HKDF_H__ |
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#define HKDF_H__ |
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#include "global.h" |
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#include "crypto.h" |
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// see RFC5869 |
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struct hkdf |
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{ |
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hmac ctx; |
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u8 prk[EVP_MAX_MD_SIZE]; |
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const void *salt; |
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int salt_len; |
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hkdf (const void *salt = 0, int len = 0, const EVP_MD *xtr_hash = EVP_sha512 ()); |
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void extract (const void *ikm, int len); |
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void extract_done (const EVP_MD *prf_hash = 0); |
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void expand (void *okm, int len, const void *info = 0, int infolen = 0); |
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static void verify (); |
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}; |
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#endif |
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