#include "tagspriv.h" static const uint8_t d[] = {	66,66,66,66,66,66,66,66,66,66,64,66,66,66,66,66,66,66,66,66,66,66,66,66,66,	66,66,66,66,66,66,66,66,66,66,66,66,66,66,66,66,66,66,62,66,66,66,63,52,53,	54,55,56,57,58,59,60,61,66,66,66,65,66,66,66, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,	10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,66,66,66,66,66,66,26,27,28,	29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,66,66,	66,66,66,66,66,66,66,66,66,66,66,66,66,66,66,66,66,66,66,66,66,66,66,66,66,	66,66,66,66,66,66,66,66,66,66,66,66,66,66,66,66,66,66,66,66,66,66,66,66,66,	66,66,66,66,66,66,66,66,66,66,66,66,66,66,66,66,66,66,66,66,66,66,66,66,66,	66,66,66,66,66,66,66,66,66,66,66,66,66,66,66,66,66,66,66,66,66,66,66,66,66,	66,66,66,66,66,66,66,66,66,66,66,66,66,66,66,66,66,66,66,66,66,66,66,66,66,	66,66,66,66,66,66};enum {	B64_WHITESPACE = 64,	B64_EQUALS,	B64_INVALID,}; intdebase64(uint8_t *in, int insz, uint8_t *out, int outsz){	uint8_t *end = in + insz;	uint8_t iter = 0;	uint32_t buf = 0;	int len = 0; 	while(in < end){		uint8_t c = d[*in++]; 		switch(c){		case B64_WHITESPACE:			continue;		case B64_INVALID:			return -1;		case B64_EQUALS:			in = end;			continue;		default:			buf = buf << 6 | c;			if(++iter == 4){				if((len += 3) > outsz)					return -1;				*out++ = (buf >> 16) & 0xff;				*out++ = (buf >> 8) & 0xff;				*out++ = buf & 0xff;				buf = 0;				iter = 0;			}		}	} 	if(iter == 3){		if((len += 2) > outsz)			return -1;		*out++ = (buf >> 10) & 0xff;		*out++ = (buf >> 2) & 0xff;	}else if(iter == 2){		if(++len > outsz)			return -1;		*out++ = (buf >> 4) & 0xff;	} 	return len;}