#include "setup.h"
#include <stdlib.h>
#include <string.h>
#define _MPRINTF_REPLACE
#include <curl/mprintf.h>
#include "urldata.h"
#include "easyif.h"
#include "base64.h"
#include "memory.h"
#include "memdebug.h"
static const char table64[]=
"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
static void decodeQuantum(unsigned char *dest, const char *src)
{
unsigned int x = 0;
int i;
char *found;
for(i = 0; i < 4; i++) {
if((found = strchr(table64, src[i])) != NULL)
x = (x << 6) + (unsigned int)(found - table64);
else if(src[i] == '=')
x = (x << 6);
}
dest[2] = (unsigned char)(x & 255);
x >>= 8;
dest[1] = (unsigned char)(x & 255);
x >>= 8;
dest[0] = (unsigned char)(x & 255);
}
size_t Curl_base64_decode(const char *src, unsigned char **outptr)
{
int length = 0;
int equalsTerm = 0;
int i;
int numQuantums;
unsigned char lastQuantum[3];
size_t rawlen=0;
unsigned char *newstr;
*outptr = NULL;
while((src[length] != '=') && src[length])
length++;
if(src[length] == '=') {
equalsTerm++;
if(src[length+equalsTerm] == '=')
equalsTerm++;
}
numQuantums = (length + equalsTerm) / 4;
if (numQuantums <= 0)
return 0;
rawlen = (numQuantums * 3) - equalsTerm;
newstr = malloc(rawlen+4);
if(!newstr)
return 0;
*outptr = newstr;
for(i = 0; i < numQuantums - 1; i++) {
decodeQuantum((unsigned char *)newstr, src);
newstr += 3; src += 4;
}
decodeQuantum(lastQuantum, src);
for(i = 0; i < 3 - equalsTerm; i++)
newstr[i] = lastQuantum[i];
newstr[i] = 0;
return rawlen;
}
size_t Curl_base64_encode(struct SessionHandle *data,
const char *inp, size_t insize, char **outptr)
{
unsigned char ibuf[3];
unsigned char obuf[4];
int i;
int inputparts;
char *output;
char *base64data;
#ifdef CURL_DOES_CONVERSIONS
char *convbuf = NULL;
#endif
char *indata = (char *)inp;
*outptr = NULL;
if(0 == insize)
insize = strlen(indata);
base64data = output = (char*)malloc(insize*4/3+4);
if(NULL == output)
return 0;
#ifdef CURL_DOES_CONVERSIONS
if(data) {
convbuf = (char*)malloc(insize);
if(!convbuf) {
free(output);
return 0;
}
memcpy(convbuf, indata, insize);
if(CURLE_OK != Curl_convert_to_network(data, convbuf, insize)) {
free(convbuf);
free(output);
return 0;
}
indata = convbuf;
}
#else
(void)data;
#endif
while(insize > 0) {
for (i = inputparts = 0; i < 3; i++) {
if(insize > 0) {
inputparts++;
ibuf[i] = *indata;
indata++;
insize--;
}
else
ibuf[i] = 0;
}
obuf[0] = (unsigned char) ((ibuf[0] & 0xFC) >> 2);
obuf[1] = (unsigned char) (((ibuf[0] & 0x03) << 4) | \
((ibuf[1] & 0xF0) >> 4));
obuf[2] = (unsigned char) (((ibuf[1] & 0x0F) << 2) | \
((ibuf[2] & 0xC0) >> 6));
obuf[3] = (unsigned char) (ibuf[2] & 0x3F);
switch(inputparts) {
case 1:
snprintf(output, 5, "%c%c==",
table64[obuf[0]],
table64[obuf[1]]);
break;
case 2:
snprintf(output, 5, "%c%c%c=",
table64[obuf[0]],
table64[obuf[1]],
table64[obuf[2]]);
break;
default:
snprintf(output, 5, "%c%c%c%c",
table64[obuf[0]],
table64[obuf[1]],
table64[obuf[2]],
table64[obuf[3]] );
break;
}
output += 4;
}
*output=0;
*outptr = base64data;
#ifdef CURL_DOES_CONVERSIONS
if(data)
free(convbuf);
#endif
return strlen(base64data);
}
#ifdef TEST_ENCODE
#include <stdio.h>
#define TEST_NEED_SUCK
void *suck(int *);
int main(int argc, argv_item_t argv[], char **envp)
{
char *base64;
size_t base64Len;
unsigned char *data;
int dataLen;
struct SessionHandle *handle = NULL;
#ifdef CURL_DOES_CONVERSIONS
handle = curl_easy_init();
if(handle == NULL) {
fprintf(stderr, "Error: curl_easy_init failed\n");
return 0;
}
#endif
data = (unsigned char *)suck(&dataLen);
base64Len = Curl_base64_encode(handle, data, dataLen, &base64);
fprintf(stderr, "%d\n", base64Len);
fprintf(stdout, "%s\n", base64);
free(base64); free(data);
#ifdef CURL_DOES_CONVERSIONS
curl_easy_cleanup(handle);
#endif
return 0;
}
#endif
#ifdef TEST_DECODE
#include <stdio.h>
#define TEST_NEED_SUCK
void *suck(int *);
int main(int argc, argv_item_t argv[], char **envp)
{
char *base64;
int base64Len;
unsigned char *data;
int dataLen;
int i, j;
#ifdef CURL_DOES_CONVERSIONS
struct SessionHandle *handle = curl_easy_init();
if(handle == NULL) {
fprintf(stderr, "Error: curl_easy_init failed\n");
return 0;
}
#endif
base64 = (char *)suck(&base64Len);
dataLen = Curl_base64_decode(base64, &data);
fprintf(stderr, "%d\n", dataLen);
for(i=0; i < dataLen; i+=0x10) {
printf("0x%02x: ", i);
for(j=0; j < 0x10; j++)
if((j+i) < dataLen)
printf("%02x ", data[i+j]);
else
printf(" ");
printf(" | ");
for(j=0; j < 0x10; j++)
if((j+i) < dataLen) {
#ifdef CURL_DOES_CONVERSIONS
if(CURLE_OK !=
Curl_convert_from_network(handle, &data[i+j], (size_t)1))
data[i+j] = '.';
#endif
printf("%c", ISGRAPH(data[i+j])?data[i+j]:'.');
} else
break;
puts("");
}
#ifdef CURL_DOES_CONVERSIONS
curl_easy_cleanup(handle);
#endif
free(base64); free(data);
return 0;
}
#endif
#ifdef TEST_NEED_SUCK
void *suck(int *lenptr)
{
int cursize = 8192;
unsigned char *buf = NULL;
int lastread;
int len = 0;
do {
cursize *= 2;
buf = (unsigned char *)realloc(buf, cursize);
memset(buf + len, 0, cursize - len);
lastread = fread(buf + len, 1, cursize - len, stdin);
len += lastread;
} while(!feof(stdin));
lenptr[0] = len;
return (void *)buf;
}
#endif