static void asc2bin (u_int8_t *bin, u_int8_t *asc, u_int16_t len)
{
int i;
for (i = 0; i < len; i += 2, asc += 2)
{
*bin++ = hexchar2bin(asc);
}
}
int hex2bin2(const char *hex, unsigned char *buf, size_t *len)
{
size_t count = 0;
char debugString[2048];
while (*hex != '\0' && count < *len)
{
// skip all that is not a hex char
while (!ISHEXCHAR(*hex) && *hex != '\0')
hex++;
if (*hex == '\0')
break;
// The nex char should be a hex char too
if (ISHEXCHAR(hex[1]))
buf[count++] = (unsigned char)(16 * hexchar2bin(*hex) + hexchar2bin(hex[1]));
else
{
printf("ERR: invalid input in hex string: expected a hex char after '%c'\n", *hex);
sprintf_s(debugString, 2047, "ERR: invalid input in hex string: expected a hex char after '%c'\n", *hex);
DebugMessage(debugString);
return -1;
}
hex += 2;
}
if (count >= *len)
{
printf("ERR: hex string too large (should be max %d bytes\n", (int) *len);
sprintf_s(debugString, 2047, "ERR: hex string too large (should be max %d bytes\n", *len);
DebugMessage(debugString);
return -1;
}
*len = count;
return 0;
}
