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68 lines
2.9 KiB
Markdown
68 lines
2.9 KiB
Markdown
# OpenSSL Client Example
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(See the README.md file in the upper level 'examples' directory for more information about examples.)
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This example shows how to set up esp openssl client and communicate over ssl transport layer.
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## How to use example
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### Python scripts
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Script example_test.py could be used as a client part to the ESP-OPENSSL server demo,
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```
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python example_test.py
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```
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Note that this script is used in automated tests, as well, so the IDF test framework packages need to be imported;
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please add `$IDF_PATH/tools/ci/python_packages` to `PYTHONPATH`.
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### Hardware Required
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This example can be executed on any ESP32 board, the only required interface is WiFi and connection to internet.
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### Configure the project
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* Open the project configuration menu (`idf.py menuconfig`)
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* Configure Wi-Fi or Ethernet under "Example Connection Configuration" menu. See "Establishing Wi-Fi or Ethernet Connection" section in [examples/protocols/README.md](../../README.md) for more details.
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* Configure the openssl client endpoint URI under "Example Configuration", if "OPENSSL_CLIENT_URI_FROM_STDIN" is selected then the example application will connect to the URI it reads from stdin (used for testing)
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* When using Make build system, set `Default serial port` under `Serial flasher config`.
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* When using OPENSSL_CLIENT_URI_FROM_STRING configure target domain and port number under "Example Configuration"
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* Please note that verification mode is VERIFY_PEER by default, that's why during connection to public host('www.baidu.com') it's needed to use
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appropriate certificates('baidu_ca.crt'), or it is needed to change verify mode to VERIFY_NONE.
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### Build and Flash
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Build the project and flash it to the board, then run monitor tool to view serial output:
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```
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idf.py -p PORT flash monitor
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```
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(To exit the serial monitor, type ``Ctrl-]``.)
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See the Getting Started Guide for full steps to configure and use ESP-IDF to build projects.
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## Example Output
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```
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I (2601) esp_netif_handlers: example_connect: sta ip: 192.168.1.191, mask: 255.255.255.0, gw: 192.168.1.1
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I (2601) example_connect: Got IPv4 event: Interface "example_connect: sta" address: 192.168.1.191
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I (3601) example_connect: Got IPv6 event: Interface "example_connect: sta" address: fe80:0000:0000:0000:260a:c4ff:fee7:a660, type: ESP_IP6_ADDR_IS_LINK_LOCAL
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I (3601) example_connect: Connected to example_connect: sta
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I (3611) example_connect: - IPv4 address: 192.168.1.191
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I (3611) example_connect: - IPv6 address: fe80:0000:0000:0000:260a:c4ff:fee7:a660, type: ESP_IP6_ADDR_IS_LINK_LOCAL
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I (3631) openssl_example: Test started
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I (3631) openssl_example: Trying connect to www.baidu.com port 443 ...
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I (3641) openssl_example: DNS lookup succeeded. IP=103.235.46.39
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I (4101) openssl_example: OK
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I (4101) openssl_example: Create SSL obj
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I (4101) openssl_example: OK
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I (4101) openssl_example: SSL verify mode = 0 connected to www.baidu.com port 443 ...
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I (8091) openssl_example: OK
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I (8091) openssl_example: SSL Connection Succeed
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```
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