circuitpython/ports/raspberrypi/common-hal/ssl/SSLContext.c
Jeff Epler c98174eea5
Add support for SSL client certificate (load_cert_chain)
Tested with badssl.com:

 1. Get client certificates from https://badssl.com/download/
 2. Convert public portion with `openssl x509 -in badssl.com-client.pem -out CIRCUITPY/cert.pem`
 3. Convert private portion with `openssl rsa -in badssl.com-client.pem -out CIRCUITPY/privkey.pem` and the password `badssl.com`
 4. Put wifi settings in CIRCUITPY/.env
 5. Run the below Python script:

```py
import os
import wifi
import socketpool
import ssl
import adafruit_requests

TEXT_URL = "https://client.badssl.com/"
wifi.radio.connect(os.getenv('WIFI_SSID'), os.getenv('WIFI_PASSWORD'))

pool = socketpool.SocketPool(wifi.radio)
context = ssl.create_default_context()
requests = adafruit_requests.Session(pool, context)

print(f"Fetching from {TEXT_URL} without certificate (should fail)")
response = requests.get(TEXT_URL)
print(f"{response.status_code=}, should be 400 Bad Request")
input("hit enter to continue\r")

print("Loading client certificate")
context.load_cert_chain("/cert.pem", "privkey.pem")
requests = adafruit_requests.Session(pool, context)

print(f"Fetching from {TEXT_URL} with certificate (should succeed)")
response = requests.get(TEXT_URL)
print(f"{response.status_code=}, should be 200 OK")
```
2022-10-10 15:10:53 -05:00

67 lines
2.5 KiB
C

/*
* This file is part of the MicroPython project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2020 Scott Shawcroft for Adafruit Industries
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "shared-bindings/ssl/SSLContext.h"
#include "shared-bindings/ssl/SSLSocket.h"
#include "shared-bindings/socketpool/SocketPool.h"
#include "py/runtime.h"
#include "py/stream.h"
#include "mbedtls/crt_bundle.h"
void common_hal_ssl_sslcontext_construct(ssl_sslcontext_obj_t *self) {
common_hal_ssl_sslcontext_set_default_verify_paths(self);
}
void common_hal_ssl_sslcontext_load_verify_locations(ssl_sslcontext_obj_t *self,
const char *cadata) {
self->crt_bundle_attach = NULL;
self->use_global_ca_store = false;
self->cacert_buf = (const unsigned char *)cadata;
self->cacert_bytes = strlen(cadata) + 1;
}
void common_hal_ssl_sslcontext_set_default_verify_paths(ssl_sslcontext_obj_t *self) {
self->crt_bundle_attach = crt_bundle_attach;
self->use_global_ca_store = true;
self->cacert_buf = NULL;
self->cacert_bytes = 0;
}
bool common_hal_ssl_sslcontext_get_check_hostname(ssl_sslcontext_obj_t *self) {
return self->check_name;
}
void common_hal_ssl_sslcontext_set_check_hostname(ssl_sslcontext_obj_t *self, bool value) {
self->check_name = value;
}
void common_hal_ssl_sslcontext_load_cert_chain(ssl_sslcontext_obj_t *self, mp_buffer_info_t *cert_buf, mp_buffer_info_t *key_buf) {
self->cert_buf = *cert_buf;
self->key_buf = *key_buf;
}