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/* |
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crypto.h -- openssl crypto wrappers |
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Copyright (C) 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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|
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#ifndef CRYPTO_H__ |
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#define CRYPTO_H__ |
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|
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#include <slog.h> |
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|
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#include <openssl/opensslv.h> |
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#include <openssl/hmac.h> |
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#include <openssl/evp.h> |
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|
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// openssl 0.9.8/1.0.0 compatibility |
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#if OPENSSL_VERSION_NUMBER < 0x10001000 |
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#define require101(exp) exp |
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#else |
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#define require101(exp) require (exp) |
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#endif |
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|
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/* this pretty much wraps the slightly weird openssl api */ |
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class hmac |
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{ |
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HMAC_CTX *ctx; |
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|
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public: |
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|
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hmac (); |
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~hmac (); |
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|
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void init (const void *key, int key_len, const EVP_MD *hash = 0) |
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{ |
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require101 (HMAC_Init_ex (ctx, key, key_len, hash, 0)); |
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} |
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|
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void init () |
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{ |
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require101 (HMAC_Init_ex (ctx, 0, 0, 0, 0)); |
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} |
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|
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void |
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add (const void *data, int len) |
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{ |
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require101 (HMAC_Update (ctx, (const unsigned char *)data, len)); |
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} |
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|
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void |
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digest (void *dgst) |
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{ |
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require101 (HMAC_Final (ctx, (unsigned char *)dgst, 0)); |
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} |
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|
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int |
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size () |
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{ |
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return HMAC_size (ctx); |
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} |
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}; |
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|
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/* cheap alloc/free wrapper only atm. */ |
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class cipher |
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{ |
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EVP_CIPHER_CTX *ctx; |
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|
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public: |
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|
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cipher (); |
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~cipher (); |
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|
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operator EVP_CIPHER_CTX *() |
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{ |
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return ctx; |
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} |
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}; |
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|
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#endif |
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|
