mirror of
https://github.com/curl/curl.git
synced 2024-11-27 05:50:21 +08:00
153 lines
3.5 KiB
C
153 lines
3.5 KiB
C
/*
|
|
* Copyright (c) 1995 - 1999 Kungliga Tekniska Högskolan
|
|
* (Royal Institute of Technology, Stockholm, Sweden).
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
*
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
*
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* 3. Neither the name of the Institute nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*/
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
#include <config.h>
|
|
#endif
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include "base64.h"
|
|
|
|
/* The last #include file should be: */
|
|
#ifdef MALLOCDEBUG
|
|
#include "memdebug.h"
|
|
#endif
|
|
|
|
static char base64[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
|
|
|
|
static int pos(char c)
|
|
{
|
|
char *p;
|
|
for(p = base64; *p; p++)
|
|
if(*p == c)
|
|
return p - base64;
|
|
return -1;
|
|
}
|
|
|
|
#if 1
|
|
int Curl_base64_encode(const void *data, int size, char **str)
|
|
{
|
|
char *s, *p;
|
|
int i;
|
|
int c;
|
|
const unsigned char *q;
|
|
|
|
p = s = (char*)malloc(size*4/3+4);
|
|
if (p == NULL)
|
|
return -1;
|
|
q = (const unsigned char*)data;
|
|
i=0;
|
|
for(i = 0; i < size;){
|
|
c=q[i++];
|
|
c*=256;
|
|
if(i < size)
|
|
c+=q[i];
|
|
i++;
|
|
c*=256;
|
|
if(i < size)
|
|
c+=q[i];
|
|
i++;
|
|
p[0]=base64[(c&0x00fc0000) >> 18];
|
|
p[1]=base64[(c&0x0003f000) >> 12];
|
|
p[2]=base64[(c&0x00000fc0) >> 6];
|
|
p[3]=base64[(c&0x0000003f) >> 0];
|
|
if(i > size)
|
|
p[3]='=';
|
|
if(i > size+1)
|
|
p[2]='=';
|
|
p+=4;
|
|
}
|
|
*p=0;
|
|
*str = s;
|
|
return strlen(s);
|
|
}
|
|
#endif
|
|
|
|
int Curl_base64_decode(const char *str, void *data)
|
|
{
|
|
const char *p;
|
|
unsigned char *q;
|
|
int c;
|
|
int x;
|
|
int done = 0;
|
|
q=(unsigned char*)data;
|
|
for(p=str; *p && !done; p+=4){
|
|
x = pos(p[0]);
|
|
if(x >= 0)
|
|
c = x;
|
|
else{
|
|
done = 3;
|
|
break;
|
|
}
|
|
c*=64;
|
|
|
|
x = pos(p[1]);
|
|
if(x >= 0)
|
|
c += x;
|
|
else
|
|
return -1;
|
|
c*=64;
|
|
|
|
if(p[2] == '=')
|
|
done++;
|
|
else{
|
|
x = pos(p[2]);
|
|
if(x >= 0)
|
|
c += x;
|
|
else
|
|
return -1;
|
|
}
|
|
c*=64;
|
|
|
|
if(p[3] == '=')
|
|
done++;
|
|
else{
|
|
if(done)
|
|
return -1;
|
|
x = pos(p[3]);
|
|
if(x >= 0)
|
|
c += x;
|
|
else
|
|
return -1;
|
|
}
|
|
if(done < 3)
|
|
*q++=(c&0x00ff0000)>>16;
|
|
|
|
if(done < 2)
|
|
*q++=(c&0x0000ff00)>>8;
|
|
if(done < 1)
|
|
*q++=(c&0x000000ff)>>0;
|
|
}
|
|
return q - (unsigned char*)data;
|
|
}
|