94 lines
3.0 KiB
C
94 lines
3.0 KiB
C
/*
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* This code originally came from here
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*
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* http://base64.sourceforge.net/b64.c
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*
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* with the following license:
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*
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* LICENCE: Copyright (c) 2001 Bob Trower, Trantor Standard Systems Inc.
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*
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* Permission is hereby granted, free of charge, to any person
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* obtaining a copy of this software and associated
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* documentation files (the "Software"), to deal in the
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* Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute,
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* sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so,
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* subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall
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* be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY
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* KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
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* WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
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* PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS
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* OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
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* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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* VERSION HISTORY:
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* Bob Trower 08/04/01 -- Create Version 0.00.00B
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*
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* I cleaned it up quite a bit to match the (linux kernel) style of the rest
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* of libwebsockets; this version is under LGPL2 like the rest of libwebsockets
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* since he explictly allows sublicensing, but I give the URL above so you can
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* get the original with Bob's super-liberal terms directly if you prefer.
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*/
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#include <stdio.h>
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#include <string.h>
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#include "private-libwebsockets.h"
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static const char encode[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
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"abcdefghijklmnopqrstuvwxyz0123456789+/";
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static const char decode[] = "|$$$}rstuvwxyz{$$$$$$$>?@ABCDEFGHIJKLMNOPQRSTUVW"
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"$$$$$$XYZ[\\]^_`abcdefghijklmnopq";
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LWS_VISIBLE int
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lws_b64_encode_string(const char *in, int in_len, char *out, int out_size)
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{
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unsigned char triple[3];
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int i;
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int len;
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int line = 0;
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int done = 0;
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while (in_len) {
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len = 0;
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for (i = 0; i < 3; i++) {
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if (in_len) {
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triple[i] = *in++;
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len++;
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in_len--;
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} else
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triple[i] = 0;
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}
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if (!len)
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continue;
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if (done + 4 >= out_size)
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return -1;
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*out++ = encode[triple[0] >> 2];
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*out++ = encode[((triple[0] & 0x03) << 4) |
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((triple[1] & 0xf0) >> 4)];
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*out++ = (len > 1 ? encode[((triple[1] & 0x0f) << 2) |
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((triple[2] & 0xc0) >> 6)] : '=');
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*out++ = (len > 2 ? encode[triple[2] & 0x3f] : '=');
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done += 4;
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line += 4;
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}
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if (done + 1 >= out_size)
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return -1;
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*out++ = '\0';
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return done;
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}
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