forked from KolibriOS/kolibrios
124 lines
2.2 KiB
C
124 lines
2.2 KiB
C
|
|
#include "base64.h"
|
|
|
|
///===============
|
|
|
|
char base64_table[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
|
|
|
|
///===============
|
|
|
|
char* strchr (const char *s, int c)
|
|
{
|
|
do {
|
|
if (*s == c)
|
|
{
|
|
return (char*)s;
|
|
}
|
|
} while (*s++);
|
|
return (0);
|
|
}
|
|
|
|
///===============
|
|
|
|
int base64_encode(char inp[], char outp[], int len)
|
|
{
|
|
int i, j;
|
|
unsigned char chr[3];
|
|
|
|
for (i = 0, j=-1; i < len; i+=3)
|
|
{
|
|
chr[0] = (unsigned char) inp[i];
|
|
if (i < len)
|
|
{
|
|
chr[1] = (unsigned char) inp[i+1];
|
|
chr[2] = (unsigned char) inp[i+2];
|
|
}
|
|
|
|
outp[++j] = base64_table[ chr[0]>>2 ];
|
|
outp[++j] = base64_table[ ((chr[0] & 3) << 4) | (chr[1] >> 4) ];
|
|
|
|
outp[++j] = base64_table[ ((chr[1] & 15) << 2) | (chr[2] >> 6) ];
|
|
outp[++j] = base64_table[ chr[2] & 63 ];
|
|
}
|
|
|
|
switch (len%3)
|
|
{
|
|
case 1:
|
|
outp[j-1] = outp[j] = '=';
|
|
break;
|
|
|
|
case 2:
|
|
outp[j] = '=';
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
|
|
};
|
|
|
|
outp[j+1] = '\0';
|
|
|
|
return j+1;
|
|
}
|
|
|
|
///===============
|
|
|
|
int base64_decode(char inp[], char outp[], int len)
|
|
{
|
|
int i, j, k;
|
|
char chr[4];
|
|
|
|
for (i = 0, j=-1, k=0; i < len; i+=4)
|
|
{
|
|
chr[0] = strchr(base64_table, inp[i]) - base64_table;
|
|
|
|
chr[1] = strchr(base64_table, inp[i+1]) - base64_table;
|
|
|
|
if (inp[i+2] == '=')
|
|
{
|
|
chr[2] = 0;
|
|
k++;
|
|
}
|
|
else
|
|
chr[2] = strchr(base64_table, inp[i+2]) - base64_table;
|
|
|
|
if (inp[i+3] == '=')
|
|
{
|
|
chr[3] = 0;
|
|
k++;
|
|
}
|
|
else
|
|
chr[3] = strchr(base64_table, inp[i+3]) - base64_table;
|
|
|
|
outp[++j] = ((chr[0] << 2) | (chr[1] >> 4));
|
|
outp[++j] = ((chr[1] << 4) | (chr[2] >> 2));
|
|
outp[++j] = ((chr[2] & 0x03 )<< 6) | (chr[3] & 0x3f);
|
|
}
|
|
|
|
outp[j+1-k] = '\0';
|
|
|
|
return j+1-k;
|
|
}
|
|
|
|
///===============
|
|
|
|
#define NULL ((void*)0)
|
|
|
|
typedef struct
|
|
{
|
|
void *name;
|
|
void *function;
|
|
} export_t;
|
|
|
|
char szbase64_encode[]={"base64_encode"};
|
|
char szbase64_decode[]={"base64_decode"};
|
|
|
|
export_t EXPORTS[] =
|
|
{
|
|
{szbase64_encode, (void*) base64_encode},
|
|
{szbase64_decode, (void*) base64_decode},
|
|
{ NULL, NULL },
|
|
};
|
|
|
|
///===============
|