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#include <stdint.h>
#include <string.h>
#include "cmd.h"
#define XORLEN 32
#define KEY "dM>}jdb,6gsnC$J^K 8(I5vyPemPs%;K"
#define LOCK_CMD "43iqr5$NB8SpN?Z/52{iVl>o|i!.'dsT"
#define UNLOCK_CMD "43iqr5$NB8SpN?Z/52{iVl>o|i!.'dsT"
static char cmd[XORLEN];
static inline void xor(const char *s, char *d, uint8_t n)
{
int i;
for (i = 0; i < n && s[i]; i++)
d[i] = s[i] ^ KEY[i];
}
int is_valid_cmd(const char *s, enum command c)
{
int rc;
char buf[XORLEN + 1];
xor(s, buf, XORLEN);
buf[XORLEN] = 0;
switch (c) {
case DOOR_LOCK:
rc = strcmp(LOCK_CMD, buf) == 0;
break;
case DOOR_UNLOCK:
rc = strcmp(UNLOCK_CMD, buf) == 0;
break;
default:
rc = 0;
break;
}
return rc;
}
char * get_cmd_hash(enum command c)
{
switch (c) {
case DOOR_LOCK:
xor(LOCK_CMD, cmd, XORLEN);
break;
case DOOR_UNLOCK:
xor(UNLOCK_CMD, cmd, XORLEN);
break;
default:
cmd[0] = 0;
break;
}
return cmd;
}
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