mirror of
https://github.com/blendogames/quadrilateralcowboy.git
synced 2024-11-21 19:51:04 +00:00
285 lines
7 KiB
C
285 lines
7 KiB
C
/***************************************************************************
|
|
* _ _ ____ _
|
|
* Project ___| | | | _ \| |
|
|
* / __| | | | |_) | |
|
|
* | (__| |_| | _ <| |___
|
|
* \___|\___/|_| \_\_____|
|
|
*
|
|
* Copyright (C) 1998 - 2004, Daniel Stenberg, <daniel@haxx.se>, et al.
|
|
*
|
|
* This software is licensed as described in the file COPYING, which
|
|
* you should have received as part of this distribution. The terms
|
|
* are also available at http://curl.haxx.se/docs/copyright.html.
|
|
*
|
|
* You may opt to use, copy, modify, merge, publish, distribute and/or sell
|
|
* copies of the Software, and permit persons to whom the Software is
|
|
* furnished to do so, under the terms of the COPYING file.
|
|
*
|
|
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
|
|
* KIND, either express or implied.
|
|
*
|
|
* $Id: base64.c,v 1.28 2004/03/01 12:54:59 bagder Exp $
|
|
***************************************************************************/
|
|
|
|
/* Base64 encoding/decoding
|
|
*
|
|
* Test harnesses down the bottom - compile with -DTEST_ENCODE for
|
|
* a program that will read in raw data from stdin and write out
|
|
* a base64-encoded version to stdout, and the length returned by the
|
|
* encoding function to stderr. Compile with -DTEST_DECODE for a program that
|
|
* will go the other way.
|
|
*
|
|
* This code will break if int is smaller than 32 bits
|
|
*/
|
|
|
|
#include "setup.h"
|
|
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
|
|
#define _MPRINTF_REPLACE /* use our functions only */
|
|
#include <curl/mprintf.h>
|
|
|
|
#include "base64.h"
|
|
|
|
#ifdef CURLDEBUG
|
|
#include "memdebug.h"
|
|
#endif
|
|
|
|
static void decodeQuantum(unsigned char *dest, const char *src)
|
|
{
|
|
unsigned int x = 0;
|
|
int i;
|
|
for(i = 0; i < 4; i++) {
|
|
if(src[i] >= 'A' && src[i] <= 'Z')
|
|
x = (x << 6) + (unsigned int)(src[i] - 'A' + 0);
|
|
else if(src[i] >= 'a' && src[i] <= 'z')
|
|
x = (x << 6) + (unsigned int)(src[i] - 'a' + 26);
|
|
else if(src[i] >= '0' && src[i] <= '9')
|
|
x = (x << 6) + (unsigned int)(src[i] - '0' + 52);
|
|
else if(src[i] == '+')
|
|
x = (x << 6) + 62;
|
|
else if(src[i] == '/')
|
|
x = (x << 6) + 63;
|
|
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);
|
|
}
|
|
|
|
/*
|
|
* Curl_base64_decode()
|
|
*
|
|
* Given a base64 string at src, decode it into the memory pointed to by
|
|
* dest. Returns the length of the decoded data.
|
|
*/
|
|
size_t Curl_base64_decode(const char *src, char *dest)
|
|
{
|
|
int length = 0;
|
|
int equalsTerm = 0;
|
|
int i;
|
|
int numQuantums;
|
|
unsigned char lastQuantum[3];
|
|
size_t rawlen=0;
|
|
|
|
while((src[length] != '=') && src[length])
|
|
length++;
|
|
while(src[length+equalsTerm] == '=')
|
|
equalsTerm++;
|
|
|
|
numQuantums = (length + equalsTerm) / 4;
|
|
|
|
rawlen = (numQuantums * 3) - equalsTerm;
|
|
|
|
for(i = 0; i < numQuantums - 1; i++) {
|
|
decodeQuantum((unsigned char *)dest, src);
|
|
dest += 3; src += 4;
|
|
}
|
|
|
|
decodeQuantum(lastQuantum, src);
|
|
for(i = 0; i < 3 - equalsTerm; i++)
|
|
dest[i] = lastQuantum[i];
|
|
|
|
return rawlen;
|
|
}
|
|
|
|
/* ---- Base64 Encoding --- */
|
|
static char table64[]=
|
|
"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
|
|
|
|
/*
|
|
* Curl_base64_encode()
|
|
*
|
|
* Returns the length of the newly created base64 string. The third argument
|
|
* is a pointer to an allocated area holding the base64 data. If something
|
|
* went wrong, -1 is returned.
|
|
*
|
|
*/
|
|
size_t Curl_base64_encode(const char *inp, size_t insize, char **outptr)
|
|
{
|
|
unsigned char ibuf[3];
|
|
unsigned char obuf[4];
|
|
int i;
|
|
int inputparts;
|
|
char *output;
|
|
char *base64data;
|
|
|
|
char *indata = (char *)inp;
|
|
|
|
if(0 == insize)
|
|
insize = strlen(indata);
|
|
|
|
base64data = output = (char*)malloc(insize*4/3+4);
|
|
if(NULL == output)
|
|
return 0;
|
|
|
|
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] = (ibuf [0] & 0xFC) >> 2;
|
|
obuf [1] = ((ibuf [0] & 0x03) << 4) | ((ibuf [1] & 0xF0) >> 4);
|
|
obuf [2] = ((ibuf [1] & 0x0F) << 2) | ((ibuf [2] & 0xC0) >> 6);
|
|
obuf [3] = ibuf [2] & 0x3F;
|
|
|
|
switch(inputparts) {
|
|
case 1: /* only one byte read */
|
|
sprintf(output, "%c%c==",
|
|
table64[obuf[0]],
|
|
table64[obuf[1]]);
|
|
break;
|
|
case 2: /* two bytes read */
|
|
sprintf(output, "%c%c%c=",
|
|
table64[obuf[0]],
|
|
table64[obuf[1]],
|
|
table64[obuf[2]]);
|
|
break;
|
|
default:
|
|
sprintf(output, "%c%c%c%c",
|
|
table64[obuf[0]],
|
|
table64[obuf[1]],
|
|
table64[obuf[2]],
|
|
table64[obuf[3]] );
|
|
break;
|
|
}
|
|
output += 4;
|
|
}
|
|
*output=0;
|
|
*outptr = base64data; /* make it return the actual data memory */
|
|
|
|
return strlen(base64data); /* return the length of the new data */
|
|
}
|
|
/* ---- End of Base64 Encoding ---- */
|
|
|
|
/************* TEST HARNESS STUFF ****************/
|
|
|
|
|
|
#ifdef TEST_ENCODE
|
|
/* encoding test harness. Read in standard input and write out the length
|
|
* returned by Curl_base64_encode, followed by the base64'd data itself
|
|
*/
|
|
#include <stdio.h>
|
|
|
|
#define TEST_NEED_SUCK
|
|
void *suck(int *);
|
|
|
|
int main(int argc, char **argv, char **envp)
|
|
{
|
|
char *base64;
|
|
size_t base64Len;
|
|
unsigned char *data;
|
|
int dataLen;
|
|
|
|
data = (unsigned char *)suck(&dataLen);
|
|
base64Len = Curl_base64_encode(data, dataLen, &base64);
|
|
|
|
fprintf(stderr, "%d\n", base64Len);
|
|
fprintf(stdout, "%s", base64);
|
|
|
|
free(base64); free(data);
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
#ifdef TEST_DECODE
|
|
/* decoding test harness. Read in a base64 string from stdin and write out the
|
|
* length returned by Curl_base64_decode, followed by the decoded data itself
|
|
*
|
|
* gcc -DTEST_DECODE base64.c -o base64 mprintf.o memdebug.o
|
|
*/
|
|
#include <stdio.h>
|
|
|
|
#define TEST_NEED_SUCK
|
|
void *suck(int *);
|
|
|
|
int main(int argc, char **argv, char **envp)
|
|
{
|
|
char *base64;
|
|
int base64Len;
|
|
unsigned char *data;
|
|
int dataLen;
|
|
int i, j;
|
|
|
|
base64 = (char *)suck(&base64Len);
|
|
data = (unsigned char *)malloc(base64Len * 3/4 + 8);
|
|
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)
|
|
printf("%c", isgraph(data[i+j])?data[i+j]:'.');
|
|
else
|
|
break;
|
|
puts("");
|
|
}
|
|
|
|
free(base64); free(data);
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
#ifdef TEST_NEED_SUCK
|
|
/* this function 'sucks' in as much as possible from stdin */
|
|
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
|