int EVP_EncodeBlock(unsigned char *t, unsigned char *f, int dlen)
int EVP_EncodeBlock(unsigned char *t, const unsigned char *f, int dlen)
int EVP_EncodeBlock(unsigned char *t, unsigned char *f, int dlen)	{	int i,ret=0;	unsigned long l;	for (i=dlen; i > 0; i-=3)		{		if (i >= 3)			{			l=	(((unsigned long)f[0])<<16L)|				(((unsigned long)f[1])<< 8L)|f[2];			*(t++)=conv_bin2ascii(l>>18L);			*(t++)=conv_bin2ascii(l>>12L);			*(t++)=conv_bin2ascii(l>> 6L);			*(t++)=conv_bin2ascii(l     );			}		else			{			l=((unsigned long)f[0])<<16L;			if (i == 2) l|=((unsigned long)f[1]<<8L);			*(t++)=conv_bin2ascii(l>>18L);			*(t++)=conv_bin2ascii(l>>12L);			*(t++)=(i == 1)?'=':conv_bin2ascii(l>> 6L);			*(t++)='=';			}		ret+=4;		f+=3;		}	*t='\0';	return(ret);	}