3.3.7

cores/esp32/MD5Builder.cpp

@@ -0,0 +1,87 @@
+/*
+  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 "HEXBuilder.h"
+#include "MD5Builder.h"
+
+void MD5Builder::begin(void) {
+  memset(_buf, 0x00, ESP_ROM_MD5_DIGEST_LEN);
+  esp_rom_md5_init(&_ctx);
+}
+
+void MD5Builder::add(const uint8_t *data, size_t len) {
+  esp_rom_md5_update(&_ctx, data, len);
+}
+
+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) {
+      free(buf);
+      return false;
+    }
+
+    // Update MD5 with buffer payload
+    esp_rom_md5_update(&_ctx, buf, numBytesRead);
+
+    // update available number of bytes
+    maxLengthLeft -= numBytesRead;
+    bytesAvailable = stream.available();
+  }
+  free(buf);
+  return true;
+}
+
+void MD5Builder::calculate(void) {
+  esp_rom_md5_final(_buf, &_ctx);
+}
+
+void MD5Builder::getBytes(uint8_t *output) {
+  memcpy(output, _buf, ESP_ROM_MD5_DIGEST_LEN);
+}
+
+void MD5Builder::getChars(char *output) {
+  bytes2hex(output, ESP_ROM_MD5_DIGEST_LEN * 2 + 1, _buf, ESP_ROM_MD5_DIGEST_LEN);
+}
+
+String MD5Builder::toString(void) {
+  char out[(ESP_ROM_MD5_DIGEST_LEN * 2) + 1];
+  getChars(out);
+  return String(out);
+}