[FL-1682] Faster file receiving function. Storage management scripts. (#647)

* Storage-cli: the file write function is splitted into a function for working with text and function for raw data
* Storage-cli: read_chunks, renamed write_raw to write_chunk
* Storage-cli: fix typo
* SD Hal: fixed wrong read/write block address
* HAL-console: printf
* Storage benchmark: more popular sizes
* Toolbox: md5
* Storage-cli: better read_chunks function, md5 hash function
* Notification: fixed incorrect error message when loading settings
* Storage-cli: stat command
* Storage-cli: stat, "/" is also storage
* Scripts: add storage managment script
* Scripts, storage lib: send command with known response syntax instead of SOH
* Scripts: python3 from env
* Storage-cli: fixed mess with error texts
* Storage-cli: write, show welcome message only if we didn't have any errors
* Storage: poorly fixed folders copying
* Storage: close an old file if an error occurred while opening a new file
* Storage-cli: fixed storage info spacing
* Scripts: use positional arguments in storage.
* Scripts: explicit string encoding and decoding, documentation in comments.

Co-authored-by: あく <alleteam@gmail.com>

lib/toolbox/md5.h

@@ -0,0 +1,83 @@
+/**
+ * \file md5.h
+ *
+ * \brief MD5 message digest algorithm (hash function)
+ *
+ *  Copyright (C) 2006-2013, Brainspark B.V.
+ *
+ *  This file is part of PolarSSL (http://www.polarssl.org)
+ *  Lead Maintainer: Paul Bakker <polarssl_maintainer at polarssl.org>
+ *
+ *  All rights reserved.
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program 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 General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License along
+ *  with this program; if not, write to the Free Software Foundation, Inc.,
+ *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include <string.h>
+#include <stdint.h>
+#include <stdlib.h>
+
+/**
+ * \brief          MD5 context structure
+ */
+typedef struct {
+    uint32_t total[2]; /*!< number of bytes processed  */
+    uint32_t state[4]; /*!< intermediate digest state  */
+    unsigned char buffer[64]; /*!< data block being processed */
+} md5_context;
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * \brief          MD5 context setup
+ *
+ * \param ctx      context to be initialized
+ */
+void md5_starts(md5_context* ctx);
+
+/**
+ * \brief          MD5 process buffer
+ *
+ * \param ctx      MD5 context
+ * \param input    buffer holding the  data
+ * \param ilen     length of the input data
+ */
+void md5_update(md5_context* ctx, const unsigned char* input, size_t ilen);
+
+/**
+ * \brief          MD5 final digest
+ *
+ * \param ctx      MD5 context
+ * \param output   MD5 checksum result
+ */
+void md5_finish(md5_context* ctx, unsigned char output[16]);
+
+/* Internal use */
+void md5_process(md5_context* ctx, const unsigned char data[64]);
+
+/**
+ * \brief          Output = MD5( input buffer )
+ *
+ * \param input    buffer holding the  data
+ * \param ilen     length of the input data
+ * \param output   MD5 checksum result
+ */
+void md5(const unsigned char* input, size_t ilen, unsigned char output[16]);
+
+#ifdef __cplusplus
+}
+#endif