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