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61 lines
2.2 KiB
61 lines
2.2 KiB
/* libanode: the Anode C reference implementation |
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* Copyright (C) 2009-2010 Adam Ierymenko <adam.ierymenko@gmail.com> |
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* |
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* This program is free software: you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation, either version 3 of the License, or |
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* (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General 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 |
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* along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
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/* Elliptic curve glue -- hides OpenSSL code behind this source module */ |
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#ifndef _ANODE_EC_H |
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#define _ANODE_EC_H |
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#include "misc.h" |
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/* Right now, only one mode is supported: NIST-P-256. This is the only mode |
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* supported in the spec as well, and should be good for quite some time. |
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* If other modes are needed this code will need to be refactored. */ |
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/* NIST-P-256 prime size in bytes */ |
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#define ANODE_EC_PRIME_BYTES 32 |
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/* Sizes of key fields */ |
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#define ANODE_EC_GROUP NID_X9_62_prime256v1 |
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#define ANODE_EC_PUBLIC_KEY_BYTES (ANODE_EC_PRIME_BYTES + 1) |
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#define ANODE_EC_PRIVATE_KEY_BYTES ANODE_EC_PRIME_BYTES |
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/* Larger of public or private key bytes, used for buffers */ |
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#define ANODE_EC_MAX_BYTES ANODE_EC_PUBLIC_KEY_BYTES |
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struct AnodeECKey |
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{ |
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unsigned char key[ANODE_EC_MAX_BYTES]; |
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unsigned int bytes; |
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}; |
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struct AnodeECKeyPair |
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{ |
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struct AnodeECKey pub; |
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struct AnodeECKey priv; |
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void *internal_key; |
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}; |
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/* Key management functions */ |
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int AnodeECKeyPair_generate(struct AnodeECKeyPair *pair); |
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int AnodeECKeyPair_init(struct AnodeECKeyPair *pair,const struct AnodeECKey *pub,const struct AnodeECKey *priv); |
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void AnodeECKeyPair_destroy(struct AnodeECKeyPair *pair); |
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int AnodeECKeyPair_agree(const struct AnodeECKeyPair *my_key_pair,const struct AnodeECKey *their_pub_key,unsigned char *key_buf,unsigned int key_len); |
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/* Provides access to the secure PRNG used to generate keys */ |
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void AnodeEC_random(unsigned char *buf,unsigned int len); |
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#endif
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