118 lines
3.1 KiB
C++
118 lines
3.1 KiB
C++
/*
|
|
Copyright (c) 2015 Hristo Gochkov. All rights reserved.
|
|
This file is part of the esp8266 core for Arduino environment.
|
|
|
|
This library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
This library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with this library; if not, write to the Free Software
|
|
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
#include <Arduino.h>
|
|
#include <MD5Builder.h>
|
|
|
|
uint8_t hex_char_to_byte(uint8_t c)
|
|
{
|
|
return (c >= 'a' && c <= 'f') ? (c - ((uint8_t)'a' - 0xa)) :
|
|
(c >= 'A' && c <= 'F') ? (c - ((uint8_t)'A' - 0xA)) :
|
|
(c >= '0' && c<= '9') ? (c - (uint8_t)'0') : 0;
|
|
}
|
|
|
|
void MD5Builder::begin(void)
|
|
{
|
|
memset(_buf, 0x00, 16);
|
|
MD5Init(&_ctx);
|
|
}
|
|
|
|
void MD5Builder::add(uint8_t * data, uint16_t len)
|
|
{
|
|
MD5Update(&_ctx, data, len);
|
|
}
|
|
|
|
void MD5Builder::addHexString(const char * data)
|
|
{
|
|
uint16_t i, len = strlen(data);
|
|
uint8_t * tmp = (uint8_t*)malloc(len/2);
|
|
if(tmp == NULL) {
|
|
return;
|
|
}
|
|
for(i=0; i<len; i+=2) {
|
|
uint8_t high = hex_char_to_byte(data[i]);
|
|
uint8_t low = hex_char_to_byte(data[i+1]);
|
|
tmp[i/2] = (high & 0x0F) << 4 | (low & 0x0F);
|
|
}
|
|
add(tmp, len/2);
|
|
free(tmp);
|
|
}
|
|
|
|
bool MD5Builder::addStream(Stream & stream, const size_t maxLen)
|
|
{
|
|
const int buf_size = 512;
|
|
int maxLengthLeft = maxLen;
|
|
uint8_t * buf = (uint8_t*) malloc(buf_size);
|
|
|
|
if(!buf) {
|
|
return false;
|
|
}
|
|
|
|
int bytesAvailable = stream.available();
|
|
while((bytesAvailable > 0) && (maxLengthLeft > 0)) {
|
|
|
|
// determine number of bytes to read
|
|
int readBytes = bytesAvailable;
|
|
if(readBytes > maxLengthLeft) {
|
|
readBytes = maxLengthLeft ; // read only until max_len
|
|
}
|
|
if(readBytes > buf_size) {
|
|
readBytes = buf_size; // not read more the buffer can handle
|
|
}
|
|
|
|
// read data and check if we got something
|
|
int numBytesRead = stream.readBytes(buf, readBytes);
|
|
if(numBytesRead< 1) {
|
|
return false;
|
|
}
|
|
|
|
// Update MD5 with buffer payload
|
|
MD5Update(&_ctx, buf, numBytesRead);
|
|
|
|
// update available number of bytes
|
|
maxLengthLeft -= numBytesRead;
|
|
bytesAvailable = stream.available();
|
|
}
|
|
free(buf);
|
|
return true;
|
|
}
|
|
|
|
void MD5Builder::calculate(void)
|
|
{
|
|
MD5Final(_buf, &_ctx);
|
|
}
|
|
|
|
void MD5Builder::getBytes(uint8_t * output)
|
|
{
|
|
memcpy(output, _buf, 16);
|
|
}
|
|
|
|
void MD5Builder::getChars(char * output)
|
|
{
|
|
for(uint8_t i = 0; i < 16; i++) {
|
|
sprintf(output + (i * 2), "%02x", _buf[i]);
|
|
}
|
|
}
|
|
|
|
String MD5Builder::toString(void)
|
|
{
|
|
char out[33];
|
|
getChars(out);
|
|
return String(out);
|
|
}
|