Hello All,
I am new to TLS topic. I am trying to integrate OTA example given in esp-idf (https://github.com/espressif/esp-idf/tr ... system/ota). I found following variable names declared as Extern.
extern const uint8_t server_cert_pem_start[] asm("_binary_ca_cert_pem_start");
extern const uint8_t server_cert_pem_end[] asm("_binary_ca_cert_pem_end");
on compilation I am getting error undeclared / undefined variable which is obvious.
I guess that these variables are declared in some other file or generated by script using .pem file as input. But the flow of generation I am not able to understand.
I have also generated ca_cert.pem and ce_key.pem file successfully as directed in the readme section.
It would be helpful if someone can help me to resolve the issue.
Thanks in advance
Gyanesh
ESP32 OTA Example pem file.
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- Posts: 10
- Joined: Wed Sep 05, 2018 8:02 am
Re: ESP32 OTA Example pem file.
Generate self-signed certificate and key:
openssl req -x509 -newkey rsa:2048 -keyout ca_key.pem -out ca_cert.pem -days 365
when ask you the Common Name type your host-name
after Copy the generate certificate to server_certs directory inside OTA example directory.
read the workflow.
openssl req -x509 -newkey rsa:2048 -keyout ca_key.pem -out ca_cert.pem -days 365
when ask you the Common Name type your host-name
after Copy the generate certificate to server_certs directory inside OTA example directory.
read the workflow.
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- Posts: 1
- Joined: Wed Dec 06, 2017 11:54 am
Re: ESP32 OTA Example pem file.
Thanks to All,
The problem is resolved now. Problem was that I was trying to integrate pem file with esp-idf version 2.x which is not updated to take care of pem file binary integration. I cloned updated idf and its compiled successfully.
Thanks again.
Gyanesh
The problem is resolved now. Problem was that I was trying to integrate pem file with esp-idf version 2.x which is not updated to take care of pem file binary integration. I cloned updated idf and its compiled successfully.
Thanks again.
Gyanesh
Re: ESP32 OTA Example pem file.
I am using esp-idf-v3.1 but still get this error. Please help
Re: ESP32 OTA Example pem file.
I integrate the OTA function to my firmware and following error occur during compilation. Please help
media/sf_ESP32/esp/simple_wifi/build/main/libmain.a(simple_wifi.o):(.literal.UserOTA+0xc): undefined reference to `_binary_ca_cert_pem_start'
media/sf_ESP32/esp/simple_wifi/build/main/libmain.a(simple_wifi.o):(.literal.UserOTA+0xc): undefined reference to `_binary_ca_cert_pem_start'
Re: ESP32 OTA Example pem file.
I had the same problem, solved it by adding the following line in component.mk
COMPONENT_EMBED_TXTFILES := ${PROJECT_PATH}/server_certs/ca_cert.pem
COMPONENT_EMBED_TXTFILES := ${PROJECT_PATH}/server_certs/ca_cert.pem
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- Posts: 2
- Joined: Thu Feb 20, 2020 10:43 am
Re: ESP32 OTA Example pem file.
i had to add below line to the CMakeLists file as well
set(COMPONENT_EMBED_TXTFILES ${PROJECT_PATH}/server_certs/ca_cert.pem)
set(COMPONENT_EMBED_TXTFILES ${PROJECT_PATH}/server_certs/ca_cert.pem)
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