v2.0.0 Add support for ESP32S2 and update ESP-IDF to 4.4 (#4996)

This is very much still work in progress and much more will change before the final 2.0.0

Some APIs have changed. New libraries have been added. LittleFS included.

Co-authored-by: Seon Rozenblum <seonr@3sprockets.com>
Co-authored-by: Me No Dev <me-no-dev@users.noreply.github.com>
Co-authored-by: geeksville <kevinh@geeksville.com>
Co-authored-by: Mike Dunston <m_dunston@comcast.net>
Co-authored-by: Unexpected Maker <seon@unexpectedmaker.com>
Co-authored-by: Seon Rozenblum <seonr@3sprockets.com>
Co-authored-by: microDev <70126934+microDev1@users.noreply.github.com>
Co-authored-by: tobozo <tobozo@users.noreply.github.com>
Co-authored-by: bobobo1618 <bobobo1618@users.noreply.github.com>
Co-authored-by: lorol <lorolouis@gmail.com>
Co-authored-by: geeksville <kevinh@geeksville.com>
Co-authored-by: Limor "Ladyada" Fried <limor@ladyada.net>
Co-authored-by: Sweety <switi.mhaiske@espressif.com>
Co-authored-by: Loick MAHIEUX <loick111@gmail.com>
Co-authored-by: Larry Bernstone <lbernstone@gmail.com>
Co-authored-by: Valerii Koval <valeros@users.noreply.github.com>
Co-authored-by: 快乐的我531 <2302004040@qq.com>
Co-authored-by: chegewara <imperiaonline4@gmail.com>
Co-authored-by: Clemens Kirchgatterer <clemens@1541.org>
Co-authored-by: Aron Rubin <aronrubin@gmail.com>
Co-authored-by: Pete Lewis <601236+lewispg228@users.noreply.github.com>

tools/sdk/esp32/include/esp-tls/private_include/esp_tls_error_capture_internal.h

@@ -0,0 +1,62 @@
+// Copyright 2017-2019 Espressif Systems (Shanghai) PTE LTD
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#ifndef __ESP_TLS_ERROR_CAPTURE_INTERNAL_H__
+#define __ESP_TLS_ERROR_CAPTURE_INTERNAL_H__
+/**
+* Note: this is an implementation placeholder for error logger.
+* This version is internal to esp-tls component and only saves single esp_err of last occurred error
+*/
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * Error tracker logging macro to enable mapping tracking errors internally
+ * or using an external/global implementation
+ */
+#define ESP_INT_EVENT_TRACKER_CAPTURE(h, type, code)    esp_tls_internal_event_tracker_capture(h, type, code)
+
+/**
+ * @brief Internal tracker capture error
+ *
+ * This implementation saves latest errors of available types
+ *
+ * @param[in]  h        esp-tls error handle
+ * @param[in]  err_type Specific error type
+ * @param[int] code     Error code to capture
+ *
+ */
+void esp_tls_internal_event_tracker_capture(esp_tls_error_handle_t h, uint32_t type, int code);
+
+/**
+ * @brief Create internal tracker storage
+ *
+ * @return Error tracker handle if success or NULL if allocation error
+ */
+esp_tls_error_handle_t esp_tls_internal_event_tracker_create(void);
+
+/**
+ * @brief Destroy internal tracker storage
+ *
+ * @param[in]  h        esp-tls error handle
+ */
+ void esp_tls_internal_event_tracker_destroy(esp_tls_error_handle_t h);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif //__ESP_TLS_ERROR_CAPTURE_INTERNAL_H__

tools/sdk/esp32/include/esp-tls/private_include/esp_tls_mbedtls.h

@@ -0,0 +1,112 @@
+// Copyright 2019 Espressif Systems (Shanghai) PTE LTD
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#pragma once
+#include "esp_tls.h"
+
+/**
+ * Internal Callback API for mbedtls_ssl_read
+ */
+ssize_t esp_mbedtls_read(esp_tls_t *tls, char *data, size_t datalen);
+
+/**
+ * Internal callback API for mbedtls_ssl_write
+ */
+ssize_t esp_mbedtls_write(esp_tls_t *tls, const char *data, size_t datalen);
+
+/**
+ * Internal Callback for mbedtls_handshake
+ */
+int esp_mbedtls_handshake(esp_tls_t *tls, const esp_tls_cfg_t *cfg);
+
+/**
+ * Internal Callback for mbedtls_cleanup , frees up all the memory used by mbedtls
+ */
+void esp_mbedtls_cleanup(esp_tls_t *tls);
+
+/**
+ * Internal Callback for Certificate verification for mbedtls
+ */
+void esp_mbedtls_verify_certificate(esp_tls_t *tls);
+
+/**
+ * Internal Callback for deleting the mbedtls connection
+ */
+void esp_mbedtls_conn_delete(esp_tls_t *tls);
+
+/**
+ * Internal Callback for mbedtls_get_bytes_avail
+ */
+ssize_t esp_mbedtls_get_bytes_avail(esp_tls_t *tls);
+
+/**
+ * Internal Callback for creating ssl handle for mbedtls
+ */
+esp_err_t esp_create_mbedtls_handle(const char *hostname, size_t hostlen, const void *cfg, esp_tls_t *tls);
+
+/**
+ * mbedTLS function for Initializing socket wrappers
+ */
+static inline void esp_mbedtls_net_init(esp_tls_t *tls)
+{
+    mbedtls_net_init(&tls->server_fd);
+}
+
+#ifdef CONFIG_ESP_TLS_SERVER
+/**
+ * Internal Callback for set_server_config
+ *
+ * /note :- can only be used with mbedtls ssl library
+ */
+esp_err_t set_server_config(esp_tls_cfg_server_t *cfg, esp_tls_t *tls);
+
+/**
+ * Internal Callback for mbedtls_server_session_create
+ *
+ * /note :- The function can only be used with mbedtls ssl library
+ */
+int esp_mbedtls_server_session_create(esp_tls_cfg_server_t *cfg, int sockfd, esp_tls_t *tls);
+
+/**
+ * Internal Callback for mbedtls_server_session_delete
+ *
+ * /note :- The function can only be used with mbedtls ssl library
+ */
+void esp_mbedtls_server_session_delete(esp_tls_t *tls);
+#endif
+
+/**
+ * Internal Callback for set_client_config_function
+ */
+esp_err_t set_client_config(const char *hostname, size_t hostlen, esp_tls_cfg_t *cfg, esp_tls_t *tls);
+
+/**
+ * Internal Callback for mbedtls_init_global_ca_store
+ */
+esp_err_t esp_mbedtls_init_global_ca_store(void);
+
+/**
+ * Callback function for setting global CA store data for TLS/SSL using mbedtls
+ */
+esp_err_t esp_mbedtls_set_global_ca_store(const unsigned char *cacert_pem_buf, const unsigned int cacert_pem_bytes);
+
+/**
+ * Internal Callback for esp_tls_global_ca_store
+ */
+mbedtls_x509_crt *esp_mbedtls_get_global_ca_store(void);
+
+/**
+ * Callback function for freeing global ca store for TLS/SSL using mbedtls
+ */
+void esp_mbedtls_free_global_ca_store(void);

tools/sdk/esp32/include/esp-tls/private_include/esp_tls_wolfssl.h

@@ -0,0 +1,93 @@
+// Copyright 2019 Espressif Systems (Shanghai) PTE LTD
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#pragma once
+#include "esp_tls.h"
+
+/**
+ * Internal Callback for creating ssl handle for wolfssl
+ */
+int esp_create_wolfssl_handle(const char *hostname, size_t hostlen, const void *cfg, esp_tls_t *tls);
+
+/**
+ * Internal Callback for wolfssl_handshake
+ */
+int esp_wolfssl_handshake(esp_tls_t *tls, const esp_tls_cfg_t *cfg);
+
+/**
+ * Internal Callback API for wolfssl_ssl_read
+ */
+ssize_t esp_wolfssl_read(esp_tls_t *tls, char *data, size_t datalen);
+
+/**
+ * Internal callback API for wolfssl_ssl_write
+ */
+ssize_t esp_wolfssl_write(esp_tls_t *tls, const char *data, size_t datalen);
+
+/**
+ * Internal Callback for wolfssl_cleanup , frees up all the memory used by wolfssl
+ */
+void esp_wolfssl_cleanup(esp_tls_t *tls);
+
+/**
+ * Internal Callback for Certificate verification for wolfssl
+ */
+void esp_wolfssl_verify_certificate(esp_tls_t *tls);
+
+/**
+ * Internal Callback for deleting the wolfssl connection
+ */
+void esp_wolfssl_conn_delete(esp_tls_t *tls);
+
+/**
+ * Internal Callback for wolfssl_get_bytes_avail
+ */
+ssize_t esp_wolfssl_get_bytes_avail(esp_tls_t *tls);
+
+/**
+ * Callback function for setting global CA store data for TLS/SSL using wolfssl
+ */
+esp_err_t esp_wolfssl_set_global_ca_store(const unsigned char *cacert_pem_buf, const unsigned int cacert_pem_bytes);
+
+/**
+ * Callback function for freeing global ca store for TLS/SSL using wolfssl
+ */
+void esp_wolfssl_free_global_ca_store(void);
+
+/**
+ *
+ * Callback function for Initializing the global ca store for TLS?SSL using wolfssl
+ */
+esp_err_t esp_wolfssl_init_global_ca_store(void);
+
+/**
+ * wolfSSL function for Initializing socket wrappers (no-operation for wolfSSL)
+ */
+static inline void esp_wolfssl_net_init(esp_tls_t *tls)
+{
+}
+
+#ifdef CONFIG_ESP_TLS_SERVER
+
+/**
+ * Function to Create ESP-TLS Server session with wolfssl Stack
+ */
+int esp_wolfssl_server_session_create(esp_tls_cfg_server_t *cfg, int sockfd, esp_tls_t *tls);
+
+/*
+ * Delete Server Session
+ */
+void esp_wolfssl_server_session_delete(esp_tls_t *tls);
+
+#endif