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/* tinyproxy - A fast light-weight HTTP proxy
* this file Copyright (C) 2016-2018 rofl0r
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "base64.h"
static const char base64_tbl[64] =
"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
/*
rofl0r's base64 impl (taken from libulz)
takes count bytes from src, writing base64 encoded string into dst.
dst needs to be at least BASE64ENC_BYTES(count) + 1 bytes in size.
the string in dst will be zero-terminated.
*/
void base64enc(char *dst, const void* src, size_t count)
{
unsigned const char *s = src;
char* d = dst;
while(count) {
int i = 0, n = *s << 16;
s++;
count--;
if(count) {
n |= *s << 8;
s++;
count--;
i++;
}
if(count) {
n |= *s;
s++;
count--;
i++;
}
*d++ = base64_tbl[(n >> 18) & 0x3f];
*d++ = base64_tbl[(n >> 12) & 0x3f];
*d++ = i ? base64_tbl[(n >> 6) & 0x3f] : '=';
*d++ = i == 2 ? base64_tbl[n & 0x3f] : '=';
}
*d = 0;
}
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