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Dependencies:   mbed

NetServices/services/http/util/base64.cpp@1:f5ac63519541, 2014-03-05 (annotated)

Committer:
Michael J. Spencer
Date:
Wed Mar 05 06:14:02 2014 -0800
Revision:
1:f5ac63519541
Initial commit.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Michael J. Spencer 1:f5ac63519541 1
Michael J. Spencer 1:f5ac63519541 2 /*
Michael J. Spencer 1:f5ac63519541 3 Copyright (c) 2010 Donatien Garnier (donatiengar [at] gmail [dot] com)
Michael J. Spencer 1:f5ac63519541 4
Michael J. Spencer 1:f5ac63519541 5 Permission is hereby granted, free of charge, to any person obtaining a copy
Michael J. Spencer 1:f5ac63519541 6 of this software and associated documentation files (the "Software"), to deal
Michael J. Spencer 1:f5ac63519541 7 in the Software without restriction, including without limitation the rights
Michael J. Spencer 1:f5ac63519541 8 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
Michael J. Spencer 1:f5ac63519541 9 copies of the Software, and to permit persons to whom the Software is
Michael J. Spencer 1:f5ac63519541 10 furnished to do so, subject to the following conditions:
Michael J. Spencer 1:f5ac63519541 11
Michael J. Spencer 1:f5ac63519541 12 The above copyright notice and this permission notice shall be included in
Michael J. Spencer 1:f5ac63519541 13 all copies or substantial portions of the Software.
Michael J. Spencer 1:f5ac63519541 14
Michael J. Spencer 1:f5ac63519541 15 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
Michael J. Spencer 1:f5ac63519541 16 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
Michael J. Spencer 1:f5ac63519541 17 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
Michael J. Spencer 1:f5ac63519541 18 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
Michael J. Spencer 1:f5ac63519541 19 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
Michael J. Spencer 1:f5ac63519541 20 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
Michael J. Spencer 1:f5ac63519541 21 THE SOFTWARE.
Michael J. Spencer 1:f5ac63519541 22 */
Michael J. Spencer 1:f5ac63519541 23
Michael J. Spencer 1:f5ac63519541 24 #include "base64.h"
Michael J. Spencer 1:f5ac63519541 25 //Originaly from Rolf's iputil.c
Michael J. Spencer 1:f5ac63519541 26
Michael J. Spencer 1:f5ac63519541 27 #ifdef __cplusplus
Michael J. Spencer 1:f5ac63519541 28 extern "C" {
Michael J. Spencer 1:f5ac63519541 29 #endif
Michael J. Spencer 1:f5ac63519541 30
Michael J. Spencer 1:f5ac63519541 31 #include <string.h>
Michael J. Spencer 1:f5ac63519541 32
Michael J. Spencer 1:f5ac63519541 33 unsigned int base64enc_len(const char* str) {
Michael J. Spencer 1:f5ac63519541 34 return (((strlen(str)-1)/3)+1)<<2;
Michael J. Spencer 1:f5ac63519541 35 }
Michael J. Spencer 1:f5ac63519541 36
Michael J. Spencer 1:f5ac63519541 37 void base64enc(const char *input, unsigned int length, char *output) {
Michael J. Spencer 1:f5ac63519541 38 static const char base64[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
Michael J. Spencer 1:f5ac63519541 39 unsigned int c, c1, c2, c3;
Michael J. Spencer 1:f5ac63519541 40 for(unsigned int i = 0, j = 0; i<length; i+=3,j+=4) {
Michael J. Spencer 1:f5ac63519541 41 c1 = ((((unsigned char)*((unsigned char *)&input[i]))));
Michael J. Spencer 1:f5ac63519541 42 c2 = (length>i+1)?((((unsigned char)*((unsigned char *)&input[i+1])))):0;
Michael J. Spencer 1:f5ac63519541 43 c3 = (length>i+2)?((((unsigned char)*((unsigned char *)&input[i+2])))):0;
Michael J. Spencer 1:f5ac63519541 44
Michael J. Spencer 1:f5ac63519541 45 c = ((c1 & 0xFC) >> 2);
Michael J. Spencer 1:f5ac63519541 46 output[j+0] = base64[c];
Michael J. Spencer 1:f5ac63519541 47 c = ((c1 & 0x03) << 4) | ((c2 & 0xF0) >> 4);
Michael J. Spencer 1:f5ac63519541 48 output[j+1] = base64[c];
Michael J. Spencer 1:f5ac63519541 49 c = ((c2 & 0x0F) << 2) | ((c3 & 0xC0) >> 6);
Michael J. Spencer 1:f5ac63519541 50 output[j+2] = (length>i+1)?base64[c]:'=';
Michael J. Spencer 1:f5ac63519541 51 c = (c3 & 0x3F);
Michael J. Spencer 1:f5ac63519541 52 output[j+3] = (length>i+2)?base64[c]:'=';
Michael J. Spencer 1:f5ac63519541 53 }
Michael J. Spencer 1:f5ac63519541 54 output[(((length-1)/3)+1)<<2] = '\0';
Michael J. Spencer 1:f5ac63519541 55 }
Michael J. Spencer 1:f5ac63519541 56
Michael J. Spencer 1:f5ac63519541 57 #ifdef __cplusplus
Michael J. Spencer 1:f5ac63519541 58 }
Michael J. Spencer 1:f5ac63519541 59 #endif
Michael J. Spencer 1:f5ac63519541 60