mirror of
https://github.com/zerotier/ZeroTierOne.git
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99 lines
2.9 KiB
C
99 lines
2.9 KiB
C
/* 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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#include "impl/aes.h"
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#include "impl/ec.h"
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#include "impl/misc.h"
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#include "impl/types.h"
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#include "anode.h"
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int AnodeAddress_calc_short_id(
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const AnodeAddress *address,
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AnodeAddressId *short_address_id)
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{
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unsigned char digest[16];
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switch(AnodeAddress_get_type(address)) {
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case ANODE_ADDRESS_ANODE_256_40:
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Anode_aes_digest(address->bits,ANODE_ADDRESS_LENGTH_ANODE_256_40,digest);
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break;
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default:
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return ANODE_ERR_ADDRESS_INVALID;
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}
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*((uint64_t *)short_address_id->bits) = ((uint64_t *)digest)[0] ^ ((uint64_t *)digest)[1];
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return 0;
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}
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int AnodeAddress_get_zone(const AnodeAddress *address,AnodeZone *zone)
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{
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switch(AnodeAddress_get_type(address)) {
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case ANODE_ADDRESS_ANODE_256_40:
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*((uint32_t *)&(zone->bits[0])) = *((uint32_t *)&(address->bits[1]));
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return 0;
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}
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return ANODE_ERR_ADDRESS_INVALID;
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}
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int AnodeAddress_to_string(const AnodeAddress *address,char *buf,int len)
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{
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const unsigned char *inptr;
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char *outptr;
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unsigned int i;
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switch(AnodeAddress_get_type(address)) {
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case ANODE_ADDRESS_ANODE_256_40:
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if (len < (((ANODE_ADDRESS_LENGTH_ANODE_256_40 / 5) * 8) + 1))
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return ANODE_ERR_BUFFER_TOO_SMALL;
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inptr = (const unsigned char *)address->bits;
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outptr = buf;
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for(i=0;i<(ANODE_ADDRESS_LENGTH_ANODE_256_40 / 5);++i) {
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Anode_base32_5_to_8(inptr,outptr);
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inptr += 5;
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outptr += 8;
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}
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*outptr = (char)0;
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return ((ANODE_ADDRESS_LENGTH_ANODE_256_40 / 5) * 8);
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}
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return ANODE_ERR_ADDRESS_INVALID;
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}
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int AnodeAddress_from_string(const char *str,AnodeAddress *address)
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{
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const char *blk_start = str;
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const char *ptr = str;
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unsigned int address_len = 0;
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while (*ptr) {
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if ((unsigned long)(ptr - blk_start) == 8) {
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if ((address_len + 5) > sizeof(address->bits))
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return ANODE_ERR_ADDRESS_INVALID;
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Anode_base32_8_to_5(blk_start,(unsigned char *)&(address->bits[address_len]));
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address_len += 5;
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blk_start = ptr;
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}
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++ptr;
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}
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if (ptr != blk_start)
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return ANODE_ERR_ADDRESS_INVALID;
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if (AnodeAddress_get_type(address) != ANODE_ADDRESS_ANODE_256_40)
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return ANODE_ERR_ADDRESS_INVALID;
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return 0;
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}
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