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