mirror of
https://github.com/espressif/arduino-esp32
synced 2024-09-21 10:28:04 +00:00
100 lines
2.7 KiB
C++
100 lines
2.7 KiB
C++
/*
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Copyright (c) 2015 Hristo Gochkov. All rights reserved.
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This file is part of the esp8266 core for Arduino environment.
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <Arduino.h>
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#include <HEXBuilder.h>
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#include <MD5Builder.h>
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void MD5Builder::begin(void) {
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memset(_buf, 0x00, ESP_ROM_MD5_DIGEST_LEN);
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esp_rom_md5_init(&_ctx);
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}
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void MD5Builder::add(const uint8_t *data, size_t len) {
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esp_rom_md5_update(&_ctx, data, len);
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}
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void MD5Builder::addHexString(const char *data) {
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size_t len = strlen(data);
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uint8_t *tmp = (uint8_t *)malloc(len / 2);
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if (tmp == NULL) {
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return;
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}
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hex2bytes(tmp, len / 2, data);
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add(tmp, len / 2);
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free(tmp);
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}
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bool MD5Builder::addStream(Stream &stream, const size_t maxLen) {
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const int buf_size = 512;
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int maxLengthLeft = maxLen;
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uint8_t *buf = (uint8_t *)malloc(buf_size);
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if (!buf) {
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return false;
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}
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int bytesAvailable = stream.available();
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while ((bytesAvailable > 0) && (maxLengthLeft > 0)) {
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// determine number of bytes to read
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int readBytes = bytesAvailable;
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if (readBytes > maxLengthLeft) {
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readBytes = maxLengthLeft; // read only until max_len
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}
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if (readBytes > buf_size) {
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readBytes = buf_size; // not read more the buffer can handle
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}
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// read data and check if we got something
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int numBytesRead = stream.readBytes(buf, readBytes);
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if (numBytesRead < 1) {
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free(buf);
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return false;
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}
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// Update MD5 with buffer payload
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esp_rom_md5_update(&_ctx, buf, numBytesRead);
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// update available number of bytes
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maxLengthLeft -= numBytesRead;
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bytesAvailable = stream.available();
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}
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free(buf);
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return true;
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}
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void MD5Builder::calculate(void) {
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esp_rom_md5_final(_buf, &_ctx);
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}
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void MD5Builder::getBytes(uint8_t *output) {
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memcpy(output, _buf, ESP_ROM_MD5_DIGEST_LEN);
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}
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void MD5Builder::getChars(char *output) {
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bytes2hex(output, ESP_ROM_MD5_DIGEST_LEN * 2 + 1, _buf, ESP_ROM_MD5_DIGEST_LEN);
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}
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String MD5Builder::toString(void) {
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char out[(ESP_ROM_MD5_DIGEST_LEN * 2) + 1];
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getChars(out);
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return String(out);
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}
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