forked from Archive/PX4-Autopilot
497 lines
12 KiB
C
497 lines
12 KiB
C
/****************************************************************************
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* apps/include/netutils/base64.h
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*
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* This file is part of the NuttX RTOS:
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*
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* Copyright (C) 2012 Gregory Nutt. All rights reserved.
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* Author: Darcy Gong
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <ctype.h>
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#include <apps/netutils/urldecode.h>
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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#ifdef CONFIG_CODECS_URLCODE
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# define IS_HEX_CHAR(ch) \
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((ch >= '0' && ch <= '9') || \
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(ch >= 'a' && ch <= 'f') || \
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(ch >= 'A' && ch <= 'F'))
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# define HEX_VALUE(ch, value) \
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if (ch >= '0' && ch <= '9') \
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{ \
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value = ch - '0'; \
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} \
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else if (ch >= 'a' && ch <= 'f') \
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{ \
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value = ch - 'a' + 10; \
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} \
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else \
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{ \
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value = ch - 'A' + 10; \
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}
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#endif
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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/****************************************************************************
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* Name: from_hex
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*
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* Description:
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* Converts a hex character to its integer value,
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*
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****************************************************************************/
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#ifdef CONFIG_CODECS_URLCODE_NEWMEMORY
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static char from_hex(char ch)
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{
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return isdigit(ch) ? ch - '0' : tolower(ch) - 'a' + 10;
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}
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#endif
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/****************************************************************************
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* Name:
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*
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* Description:
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* Converts an integer value to its hex character,
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*
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****************************************************************************/
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#ifdef CONFIG_CODECS_URLCODE_NEWMEMORY
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static char to_hex(char code)
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{
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static const char hex[] = "0123456789abcdef";
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return hex[code & 15];
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}
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#endif
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/****************************************************************************
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* Name: int2h
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*
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* Description:
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* Convert a single character to a 2 digit hex str a terminating '\0' is
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* added
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*
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****************************************************************************/
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#ifdef CONFIG_CODECS_AVR_URLCODE
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static void int2h(char c, char *hstr)
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{
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hstr[1] = (c & 0xf) + '0';
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if ((c & 0xf) > 9)
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{
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hstr[1] = (c & 0xf) - 10 + 'a';
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}
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c = (c >> 4) & 0xf;
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hstr[0] = c + '0';
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if (c > 9)
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{
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hstr[0] = c - 10 + 'a';
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}
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hstr[2] = '\0';
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}
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#endif
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/****************************************************************************
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* Name: h2int
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*
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* Description:
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* Convert a single hex digit character to its integer value.
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*
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****************************************************************************/
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#ifdef CONFIG_CODECS_AVR_URLCODE
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static unsigned char h2int(char c)
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{
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if (c >= '0' && c <= '9')
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{
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return ((unsigned char)c - '0');
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}
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if (c >= 'a' && c <= 'f')
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{
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return ((unsigned char)c - 'a' + 10);
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}
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if (c >= 'A' && c <= 'F')
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{
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return ((unsigned char)c - 'A' + 10);
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}
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return 0;
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}
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#endif
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name:
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*
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* Description:
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* Returns a url-encoded version of str.
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*
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* IMPORTANT: be sure to free() the returned string after use.
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*
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****************************************************************************/
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#ifdef CONFIG_CODECS_URLCODE_NEWMEMORY
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char *url_encode(char *str)
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{
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char *pstr = str;
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char *buf = malloc(strlen(str) * 3 + 1);
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char *pbuf = buf;
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while (*pstr)
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{
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if (isalnum(*pstr) || *pstr == '-' || *pstr == '_' || *pstr == '.' || *pstr == '~')
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{
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*pbuf++ = *pstr;
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}
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else if (*pstr == ' ')
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{
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*pbuf++ = '+';
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}
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else
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{
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*pbuf++ = '%';
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*pbuf++ = to_hex(*pstr >> 4);
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*pbuf++ = to_hex(*pstr & 15);
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}
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pstr++;
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}
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*pbuf = '\0';
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return buf;
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}
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#endif
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/****************************************************************************
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* Name: url_decode
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*
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* Description:
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* Returns a url-decoded version of str.
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*
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* IMPORTANT: be sure to free() the returned string after use.
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*
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****************************************************************************/
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#ifdef CONFIG_CODECS_URLCODE_NEWMEMORY
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char *url_decode(char *str)
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{
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char *pstr = str;
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char *buf = malloc(strlen(str) + 1);
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char *pbuf = buf;
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while (*pstr)
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{
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if (*pstr == '%')
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{
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if (pstr[1] && pstr[2])
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{
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*pbuf++ = from_hex(pstr[1]) << 4 | from_hex(pstr[2]);
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pstr += 2;
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}
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}
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else if (*pstr == '+')
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{
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*pbuf++ = ' ';
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}
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else
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{
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*pbuf++ = *pstr;
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}
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pstr++;
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}
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*pbuf = '\0';
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return buf;
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}
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#endif
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/****************************************************************************
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* Name: urlencode
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****************************************************************************/
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#ifdef CONFIG_CODECS_URLCODE
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char *urlencode(const char *src, const int src_len, char *dest, int *dest_len)
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{
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static const unsigned char hex_chars[] = "0123456789ABCDEF";
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const unsigned char *pSrc;
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const unsigned char *pEnd;
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char *pDest;
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pDest = dest;
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pEnd = (unsigned char *)src + src_len;
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for (pSrc = (unsigned char *)src; pSrc < pEnd; pSrc++)
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{
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if ((*pSrc >= '0' && *pSrc <= '9') ||
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(*pSrc >= 'a' && *pSrc <= 'z') ||
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(*pSrc >= 'A' && *pSrc <= 'Z') ||
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(*pSrc == '_' || *pSrc == '-' || *pSrc == '.' || *pSrc == '~'))
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{
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*pDest++ = *pSrc;
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}
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else if (*pSrc == ' ')
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{
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*pDest++ = '+';
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}
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else
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{
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*pDest++ = '%';
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*pDest++ = hex_chars[(*pSrc) >> 4];
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*pDest++ = hex_chars[(*pSrc) & 0x0F];
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}
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}
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*pDest = '\0';
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*dest_len = pDest - dest;
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return dest;
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}
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#endif
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/****************************************************************************
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* Name: urldecode
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****************************************************************************/
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#ifdef CONFIG_CODECS_URLCODE
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char *urldecode(const char *src, const int src_len, char *dest, int *dest_len)
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{
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const unsigned char *pSrc;
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const unsigned char *pEnd;
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char *pDest;
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unsigned char cHigh;
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unsigned char cLow;
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int valHigh;
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int valLow;
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pDest = dest;
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pSrc = (unsigned char *)src;
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pEnd = (unsigned char *)src + src_len;
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while (pSrc < pEnd)
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{
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if (*pSrc == '%' && pSrc + 2 < pEnd)
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{
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cHigh = *(pSrc + 1);
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cLow = *(pSrc + 2);
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if (IS_HEX_CHAR(cHigh) && IS_HEX_CHAR(cLow))
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{
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HEX_VALUE(cHigh, valHigh)
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HEX_VALUE(cLow, valLow)
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*pDest++ = (valHigh << 4) | valLow;
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pSrc += 3;
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}
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else
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{
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*pDest++ = *pSrc;
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pSrc++;
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}
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}
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else if (*pSrc == '+')
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{
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*pDest++ = ' ';
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pSrc++;
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}
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else
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{
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*pDest++ = *pSrc;
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pSrc++;
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}
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}
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*pDest = '\0';
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*dest_len = pDest - dest;
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return dest;
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}
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#endif
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/****************************************************************************
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* Name: urlencode_len
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****************************************************************************/
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#ifdef CONFIG_CODECS_URLCODE
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int urlencode_len(const char *src, const int src_len)
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{
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const unsigned char *pSrc;
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const unsigned char *pEnd;
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int len = 0;
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pEnd = (unsigned char *)src + src_len;
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for (pSrc = (unsigned char *)src; pSrc < pEnd; pSrc++)
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{
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if ((*pSrc >= '0' && *pSrc <= '9') ||
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(*pSrc >= 'a' && *pSrc <= 'z') ||
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(*pSrc >= 'A' && *pSrc <= 'Z') ||
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(*pSrc == '_' || *pSrc == '-' || *pSrc == '.' || *pSrc == '~' || *pSrc == ' '))
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{
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len++;
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}
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else
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{
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len+=3;
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}
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}
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return len;
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}
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#endif
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/****************************************************************************
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* Name: urldecode_len
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****************************************************************************/
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#ifdef CONFIG_CODECS_URLCODE
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int urldecode_len(const char *src, const int src_len)
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{
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const unsigned char *pSrc;
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const unsigned char *pEnd;
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int len = 0;
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unsigned char cHigh;
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unsigned char cLow;
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pSrc = (unsigned char *)src;
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pEnd = (unsigned char *)src + src_len;
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while (pSrc < pEnd)
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{
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if (*pSrc == '%' && pSrc + 2 < pEnd)
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{
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cHigh = *(pSrc + 1);
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cLow = *(pSrc + 2);
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if (IS_HEX_CHAR(cHigh) && IS_HEX_CHAR(cLow))
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{
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pSrc += 2;
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}
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}
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len++;
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pSrc++;
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}
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return len;
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}
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#endif
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/****************************************************************************
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* Name: urlrawdecode
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*
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* Description:
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* decode a url string e.g "hello%20joe" or "hello+joe" becomes "hello joe"
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*
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****************************************************************************/
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#ifdef CONFIG_CODECS_AVR_URLCODE
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void urlrawdecode(char *urlbuf)
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{
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char c;
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char *dst;
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dst = urlbuf;
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while ((c = *urlbuf))
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{
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if (c == '+')
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{
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c = ' ';
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}
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if (c == '%')
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{
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urlbuf++;
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c = *urlbuf;
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urlbuf++;
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c = (h2int(c) << 4) | h2int(*urlbuf);
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}
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*dst = c;
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dst++;
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urlbuf++;
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}
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*dst = '\0';
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}
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#endif
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/****************************************************************************
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* Name: urlrawencode
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*
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* Description:
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* There must be enoug space in urlbuf. In the worst case that is 3 times
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* the length of str
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*
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****************************************************************************/
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#ifdef CONFIG_CODECS_AVR_URLCODE
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void urlrawencode(char *str, char *urlbuf)
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{
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char c;
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while ((c = *str))
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{
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if (c == ' ' || isalnum(c) || c == '_' || c == '-' || c == '.' || c == '~')
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{
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if (c == ' ')
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{
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c = '+';
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}
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*urlbuf = c;
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str++;
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urlbuf++;
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continue;
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}
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*urlbuf = '%';
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urlbuf++;
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int2h(c, urlbuf);
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urlbuf++;
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urlbuf++;
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str++;
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}
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*urlbuf = '\0';
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}
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#endif
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