mirror of
https://github.com/zerotier/ZeroTierOne.git
synced 2024-12-24 23:26:41 +00:00
67 lines
2.1 KiB
C
67 lines
2.1 KiB
C
/* libanode: the Anode C reference implementation
|
|
* Copyright (C) 2009 Adam Ierymenko <adam.ierymenko@gmail.com>
|
|
*
|
|
* This program 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/>. */
|
|
|
|
#ifndef _SPARK_WRAPPER_H
|
|
#define _SPARK_WRAPPER_H
|
|
|
|
#include <openssl/sha.h>
|
|
#include "../libanode/aes128.h"
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
/* Spark uses SHA-256 with hash length 32 */
|
|
#define SPARK_HASH_LENGTH 32
|
|
|
|
// Wrap a segment for forward propagation
|
|
static inline void Spark_wrap(void *data,unsigned long len,void *plaintext_hash_buf,void *global_hash_buf)
|
|
{
|
|
unsigned char expkey[ANODE_AES128_EXP_KEY_SIZE];
|
|
|
|
SHA256((const unsigned char *)data,len,(unsigned char *)plaintext_hash_buf);
|
|
|
|
Anode_aes128_expand_key(expkey,(const unsigned char *)plaintext_hash_buf);
|
|
Anode_aes128_cfb_encrypt(expkey,((const unsigned char *)plaintext_hash_buf) + 16,(unsigned char *)data,len);
|
|
|
|
SHA256((const unsigned char *)data,len,(unsigned char *)global_hash_buf);
|
|
}
|
|
|
|
// Unwrap a segment and check its integrity
|
|
static inline int Spark_unwrap(void *data,unsigned long len,const void *plaintext_hash)
|
|
{
|
|
unsigned char expkey[ANODE_AES128_EXP_KEY_SIZE];
|
|
unsigned char check_hash[32];
|
|
unsigned long i;
|
|
|
|
Anode_aes128_expand_key(expkey,(const unsigned char *)plaintext_hash);
|
|
Anode_aes128_cfb_decrypt(expkey,((const unsigned char *)plaintext_hash) + 16,(unsigned char *)data,len);
|
|
|
|
SHA256((const unsigned char *)data,len,check_hash);
|
|
|
|
for(i=0;i<32;++i) {
|
|
if (check_hash[i] != ((const unsigned char *)plaintext_hash)[i])
|
|
return 0;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif
|