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View Code? Open in Web Editor NEWPort of BearSSL to Arduino
License: MIT License
Port of BearSSL to Arduino
License: MIT License
Here the connection might already by closed but there may still be data available in the client's buffer. To work correctly, it should be changed to
return c->read(buf, len);
I installed the BearSSL library latest version. I put the ArduinoBearSSLConfig.h
file in the same directory as my sketch, and modified it to uncomment the line:
#define ARDUINO_DISABLE_ECCX08
In my sketch I have
#include "ArduinoBearSSLConfig.h"
#include <ArduinoBearSSL.h>
But I get a compile error:
Error compiling for board Arduino/Genuino MKR1000
I also tried adding the #define
at the top of my sketch, but still get the compile error.
I thought I saw someone else using this library with MKR1000, so I must be missing something.
} else if (command == "9") {
AES128Class AES128;
int inputMessageIndex = receivedMessage.indexOf("$", commandIndex + 1);
String inputMessage = receivedMessage.substring(commandIndex + 1, inputMessageIndex);
int length = inputMessage.length();
char input[length + 1];
uint8_t UInput[length + 1];
inputMessage.toCharArray(input, length + 1);
convertCharToUint8(input, UInput, length);
AES128.runEnc(UApplicationKey, sizeof(UApplicationKey), UInput, length, UApplicationIV);
printHex(UInput, length);
} else if (command == "10") {
When attempting to run AES128 encryption the device will hard lock without crashing or panicking
How do you use Bearssl without using a crypto chip. How do you atrach the private, public, and certificate?
Thanks
Hello,
First of all Thanks for your work!
As this is my first ever comment on GitHub I'm not quite sure whether I am right here but anyways..
I do need to make my UNO WiFi Rev 2 an AWS "Thing". So I followed the instructions given here:
https://create.arduino.cc/projecthub/Arduino_Genuino/securely-connecting-an-arduino-mkr-wifi-1010-to-aws-iot-core-a9f365
Which went fine until compiling, as the Flash of the UNO is only 48kB which I overshot by 400%.
Searching the internet gave me no solution, only other people with the same problem. On https://www.bearssl.org/sizes.html I found a size calculator and some information making me guess, that it should be possible to shrink the library for that specific use case to a compiled size of less than 20kB. Alone - I don't know how and commenting out section by section is not .... efficient.
So: Is there a way to have that exact functionality as given in the first link but with no more than 30kB of compiled size? And if so, how would I do that?
Thank you!
Chris
P.S. Reducing the buffer size helped, but still > 100% of the available memory blocked and I can't assess how low I can go
I keep getting undefined reference to `_gettimeofday
issue when importing the ArduinoBearSSL library.
undefined reference to `_gettimeofday'
Linking .pio\build\teensy40\firmware.elf
c:/users/ganna/.platformio/packages/toolchain-gccarmnoneeabi/bin/../lib/gcc/arm-none-eabi/5.4.1/../../../../arm-none-eabi/lib/armv7e-m/fpu/fpv5-d16\libc.a(lib_a-gettimeofdayr.o): In function `_gettimeofday_r':
gettimeofdayr.c:(.text._gettimeofday_r+0x10): undefined reference to `_gettimeofday'
collect2.exe: error: ld returned 1 exit status
*** [.pio\build\teensy40\firmware.elf] Error 1
the fix mentioned arduino/Arduino#9413 seems to solve it.
But wanted to understand the reason for this issue? any help is appreciated.
Thanks
Digital Signatures are a very big need and they usually rely in PKCS1.5 algorithm.
Currently BearSSL provides the algorithmic implementation but it cannot be accessed through the ArduinoBearSSL library since the object layer is missing.
It would be great if this could be made and shared.
hello friend
how can I use this function so that it recevies Auto handshake without certificate???
exp : when using class esp8266secure can get data handshake & its dosent need cert.h class or function & gets the certificate automaticaly the same as chrome browser when searching the web site
thx
Good morning @per1234 ๐
After you've already successfully added CI to this repository may I ask you to add the corresponding CI badges to the README of this repository?
Hello Team,
The ATECC608B-TNGTLS comes pre-configured and pre-provisioned with default thumbprint certificates and keys which can be used the cloud infrastructure would not require verification of the thumbprint certificate by a certificate authority. Can ArduinoBearSSL along with ArduinoECCX08 leverage this functionality eliminating the need to create a CSR ( coming from this tutorial ) and register it with AWS using Multi-Account Registration?
This is needed for seamless access to Let'sEncrypt-enabled websites
I am trying to use the HMACSHA256 signing capability on an ESP32 but I also need the HTTPClient.
When I include the HTTPClient.h, which depends on WiFiClientSecure.h in your sample, I get a redeclaration issue.
Sample code:
/*
ArduinoBearSSL SHA256
This sketch demonstrates how to create a SHA256 hash and HMAC
for an input string.
This example code is in the public domain.
*/
#include <HTTPClient.h>
#include <ArduinoBearSSL.h>
#include "SHA256.h"
#ifdef ARDUINO_ARCH_MEGAAVR
// Create the object
SHA256Class SHA256;
#endif
void setup() {
Serial.begin(9600);
while (!Serial);
// expect 0xE3B0C44298FC1C149AFBF4C8996FB92427AE41E4649B934CA495991B7852B855
printSHA256("");
// expect 0xD7A8FBB307D7809469CA9ABCB0082E4F8D5651E46D3CDB762D02D0BF37C9E592
printSHA256("The quick brown fox jumps over the lazy dog");
// expect 0xB613679A0814D9EC772F95D778C35FC5FF1697C493715653C6C712144292C5AD
printHMACSHA256("", "");
// expect 0xF7BC83F430538424B13298E6AA6FB143EF4D59A14946175997479DBC2D1A3CD8
printHMACSHA256("key", "The quick brown fox jumps over the lazy dog");
}
void loop() {
}
void printSHA256(const char* str) {
Serial.print("SHA256 of '");
Serial.print(str);
Serial.print("' is 0x");
SHA256.beginHash();
SHA256.print(str);
SHA256.endHash();
printResult();
}
void printHMACSHA256(const char* secret, const char* str) {
Serial.print("HMAC-SHA256 of '");
Serial.print(str);
Serial.print("' with secret '");
Serial.print(secret);
Serial.print("' is 0x");
SHA256.beginHmac(secret);
SHA256.print(str);
SHA256.endHmac();
printResult();
}
void printResult()
{
while (SHA256.available()) {
byte b = SHA256.read();
if (b < 16) {
Serial.print("0");
}
Serial.print(b, HEX);
}
Serial.println();
}
Error:
In file included from d:\Onedrive - Microsoft\Documents\Arduino\libraries\ArduinoBearSSL\src/ArduinoBearSSL.h:35,
from C:\Users\kevinsay\AppData\Local\Temp\.arduinoIDE-unsaved2023911-24336-1vv5l1k.d1vj\SHA256\SHA256.ino:11:
d:\Onedrive - Microsoft\Documents\Arduino\libraries\ArduinoBearSSL\src/SHA1.h:50:18: error: 'SHA1Class SHA1' redeclared as different kind of symbol
extern SHA1Class SHA1;
^~~~
In file included from C:\Users\kevinsay\AppData\Local\Arduino15\packages\esp32\hardware\esp32\2.0.11/tools/sdk/esp32s3/include/hal/include/hal/sha_types.h:25,
from C:\Users\kevinsay\AppData\Local\Arduino15\packages\esp32\hardware\esp32\2.0.11/tools/sdk/esp32s3/include/mbedtls/port/include/sha512_alt.h:28,
from C:\Users\kevinsay\AppData\Local\Arduino15\packages\esp32\hardware\esp32\2.0.11/tools/sdk/esp32s3/include/mbedtls/mbedtls/include/mbedtls/sha512.h:69,
from C:\Users\kevinsay\AppData\Local\Arduino15\packages\esp32\hardware\esp32\2.0.11/tools/sdk/esp32s3/include/mbedtls/mbedtls/include/mbedtls/entropy.h:34,
from C:\Users\kevinsay\AppData\Local\Arduino15\packages\esp32\hardware\esp32\2.0.11\libraries\WiFiClientSecure\src/ssl_client.h:11,
from C:\Users\kevinsay\AppData\Local\Arduino15\packages\esp32\hardware\esp32\2.0.11\libraries\WiFiClientSecure\src/WiFiClientSecure.h:26,
from C:\Users\kevinsay\AppData\Local\Arduino15\packages\esp32\hardware\esp32\2.0.11\libraries\HTTPClient\src/HTTPClient.h:37,
from C:\Users\kevinsay\AppData\Local\Temp\.arduinoIDE-unsaved2023911-24336-1vv5l1k.d1vj\SHA256\SHA256.ino:10:
C:\Users\kevinsay\AppData\Local\Arduino15\packages\esp32\hardware\esp32\2.0.11/tools/sdk/esp32s3/include/esp_rom/include/esp32s3/rom/sha.h:25:5: note: previous declaration 'SHA_TYPE SHA1'
SHA1 = 0,
^~~~
exit status 1
Compilation error: exit status 1
I'm using ArduinoBearSSL to connect to server with TLS and its works with the 1.5.0 release butnot with the 1.6.0 release. Going back through the commits trying each it breaks with this change: #31
The server does have a certificate with an ECDSA key.
Is there some bug, or am I suppose to explicitly call setEccVrfy/setEccSign now? And if so what would the arg be?
I'm opening this issue to know if it would be possible to make ArduinoECCX08 optional?
Indeed, I'm currently using ArduinoBearSSL on an Arduino MKR NB 1500 but without using the ArduinoECCX08 (thanks to setEccVrfy
, setEccSign
, etc.).
I'm planning to continue to use ArduinoBearSSL on a STM32 board so I made some modifications to protect all the ArduinoECC08 specific code by ifndef ARDUINO_DISABLE_ECCX08
.
Ideally, I would like to upstream this modification but I'm not sure if it makes sense for you and I don't know if there is a standard way to declare or manage optional dependency in the Arduino world (i.e. if Arduino was autotools/cmake/meson based, I would declare an option such as --disable-eccx08).
uploading root certificate of www.google.com:443
on an Arduino MKR Wifi 1010 and connecting afterwards to it with the example WifiSSLClient
works perfectly.
But all my trials to connect via port 8883 TLS encrypted with a ca_certificate failed. I tried a local MQTTS-Broker and also the test.mosquitto.org broker. Uploading certificates onto the board for the domains
finished with no errors, but the connection fails. It shows a -2
error code when asking with MqttClient.connectError()
for it. The MqttClient
object is derived from BearSSLClient
.
I also posted this issue in the arduino.cc forum:
https://forum.arduino.cc/t/mqtts-with-arduino-mkr-wifi-1010/1094414
I'm trying to use ArduinoBearSSL on an Arduino Nano 33 IoT board to talk to a server that requires mutual TLS, but can't get it to work. I'm guessing its because the server is using a custom certificate which ArduinoBearSSL doesn't know about.
I've tried using setInsecure(BearSSLClient::SNI::Insecure) but that I think must also disables presenting the client certificate thats set with sslClient.setEccSlot call, so the TLS connection still fails.
How can I set a custom CA certificate? Is there any API to do that?
TIA!
I am having a weird problem: everything works fine when my eps8266ex (esp-01s) is connected to my ASUS Router that connects to my modem. However, when I try to connect to an old Access Point, the bot connection stops working and apparently it jam's the entire connection to that Access Point. This access point is connected to the Asus Router.
The Router seems to be working fine with my laptop, I use it daily and the performance is OK. I have tried many different versions of the esp8266 core (from 2.4.2 onwards) with no success.
The error I am getting is this:
20:30:59.796 -> connected with Coxinha-Sala, channel 3
20:30:59.796 -> dhcp client start...
20:30:59.831 -> ip:192.168.20.28,mask:255.255.255.0,gw:192.168.20.1
20:31:00.043 -> BSSL:_connectSSL: start connection
20:31:00.315 -> BSSL:_wait_for_handshake: failed
20:31:00.315 -> BSSL:Couldn't connect. Error = 'Unknown error code.'
20:31:00.315 -> numNewMessages: 0
20:31:01.539 -> BSSL:_connectSSL: start connection
20:31:01.810 -> BSSL:_wait_for_handshake: failed
20:31:01.810 -> BSSL:Couldn't connect. Error = 'Unknown error code.'
20:31:01.810 -> numNewMessages: 0
20:31:03.039 -> BSSL:_connectSSL: start connection
20:31:03.313 -> BSSL:_wait_for_handshake: failed
20:31:03.313 -> BSSL:Couldn't connect. Error = 'Unknown error code.'
20:31:03.313 -> numNewMessages: 0
20:31:04.546 -> BSSL:_connectSSL: start connection
20:31:04.784 -> BSSL:_wait_for_handshake: failed
20:31:04.784 -> BSSL:Couldn't connect. Error = 'Unknown error code.'
20:31:04.784 -> numNewMessages: 0
20:31:05.783 -> state: 5 -> 2 (3c0)
20:31:05.783 -> rm 0
20:31:05.783 -> BSSL:connect: Unable to connect TCP socket
20:31:05.783 -> numNewMessages: 0
20:31:06.793 -> reconnect
20:31:06.793 -> state: 2 -> 0 (0)
20:31:06.793 -> BSSL:connect: Unable to connect TCP socket
20:31:06.793 -> numNewMessages: 0
20:31:06.929 -> scandone
20:31:06.929 -> state: 0 -> 2 (b0) 20:31:06.929 -> state: 2 -> 3 (0)
20:31:06.929 -> state: 3 -> 5 (10) 20:31:06.929 -> add 0
20:31:06.929 -> aid 2 20:31:06.929 -> cnt
20:31:07.794 -> BSSL:connect: Unable to connect TCP socket
20:31:07.794 -> numNewMessages: 0
20:31:07.827 ->
and my source code (very simple):
#include <ESP8266WiFi.h>
#include <WiFiClientSecure.h>
#include <ESP8266WebServer.h>
#include <ESP8266mDNS.h>
#include <UniversalTelegramBot.h>
#ifndef STASSID
#define STASSID "Coxinha-Sala"
#define STAPSK "mercadolivrez"
#define BOTTOKEN "1041453184:AAH4WVWmWLyQ62btyxV5-gWqetUZB_306GY"
#endif
const char* ssid = STASSID;
const char* password = STAPSK;
const char* bot_token = BOTTOKEN;
ESP8266WebServer server(80);
const int ledPin = 2;
WiFiClientSecure client;
UniversalTelegramBot *bot;
const int Bot_mtbs = 1000; //mean time between scan messages
long Bot_lasttime; //last time messages' scan has been done
void handleRoot() {
digitalWrite(ledPin, LOW);
server.send(200, "text/plain", "hello from esp8266!");
delay(300);
digitalWrite(ledPin, HIGH);
}
void setup(void) {
pinMode(ledPin, OUTPUT);
digitalWrite(ledPin, 0);
Serial.begin(115200);
startLedSequence();
WiFi.mode(WIFI_STA);
WiFi.begin(ssid, password);
Serial.println("");
// Wait for connection
while (WiFi.status() != WL_CONNECTED) {
delay(500);
Serial.print(".");
}
Serial.println("");
Serial.print("Connected to ");
Serial.println(ssid);
Serial.print("IP address: ");
Serial.println(WiFi.localIP());
if (MDNS.begin("esp8266")) {
Serial.println("MDNS responder started");
}
server.on("/", handleRoot);
server.on("/inline", {
server.send(200, "text/plain", "this works as well");
});
server.onNotFound(handleNotFound);
server.begin();
Serial.println("HTTP server started");
client.setInsecure();
bot = new UniversalTelegramBot(bot_token, client);
Serial.println(ESP.getFullVersion());
}
void loop(void) {
server.handleClient();
MDNS.update();
if (millis() > Bot_lasttime + Bot_mtbs) {
int numNewMessages = bot->getUpdates(bot->last_message_received + 1) + 0;
Serial.println("numNewMessages: " + (String)numNewMessages);
while (numNewMessages) {
Serial.println("Message received from: " + bot->messages[0].from_id);
// handleNewMessages(numNewMessages);
numNewMessages = bot->getUpdates(bot->last_message_received + 1);
}
Bot_lasttime = millis();
}
}
void startLedSequence() {
Serial.println("Starting...");
digitalWrite(ledPin, HIGH); // Turn the LED off by making the voltage HIGH
Serial.println("ledPin off");
Serial.println("Starting led sequence completed.");
}
void handleNewMessages(int numNewMessages) {
Serial.println("Received " + String(numNewMessages) + " new request(s)...");
}
Hello team,
I failed to send a long data(> 512bytes), using BearSSLClient::write(const uint8_t *buf, size_t size)
Suppose that buf stored 600 bytes data and br_sslio_write()
could send 512 bytes at maximum each call.
Call write(buf, 600)
Expected behavior
write()
sends 600 bytes and returns 600
Current behavior
write()
sends 1024 bytes and returns 1024
Detail:
write(buf, 600)
while
loop
br_sslio_write()
sends 512 bytes from &buf[0]
and returns 512, buf points at &buf[512], written = 512written < size
is truewhile
loop
br_sslio_write()
sends 512 bytes from &buf[512]
and returns 512, buf points at &buf[1024], written = 1024written < size
is false and escaping from the loopwrite()
returns 1024To fix this issue, I'd like to change here
from:
int result = br_sslio_write(&_ioc, buf, size);
to:
int result = br_sslio_write(&_ioc, buf, size - written);
Good day,
We are developing an Arduino based device that sends an https post to a server. We use the Arduino MKR Zero and an ethernet shield. When we use this function:
sslClient.setInsecure(BearSSLClient::SNI::Insecure);
We get this error when the compilation is done:
'class BearSSLClient' has no member named 'setInsecure'
Do you know what could be the origin of this error?
The problem of #56 is even bigger: ::ClientRead()
and ::ClientWrite()
are called in bearssl ssl_io.c. If the socket client connection (Client *c
) is lost or reset by the peer, both c->read(buf, len)
and c->write(buf, len)
will return a 0 (at least on the ESP32 but I think this is standard behavior also on an Arduino) thus causing an infinite loop in static int run_until(br_sslio_context *ctx, unsigned target)
in ssl_io.c.
In my situation this problem occurs on a bad WiFi connection, but I think it may also occur on a bad tcp/ip connection or if the peer closes the connection.
One solution would be to add a timeout in the run_until()
function, but I think it is better not to touch the original library. So I made adaptations to ::ClientRead()
and ::ClientWrite()
that involve static variables, which I think is a bad programming habit, but this is the only way to record a state between calls to these functions.
I did not introduce a new timeout value, but use the value of the socket client c->getTimeout()
.
int BearSSLClient::clientRead(void *ctx, unsigned char *buf, size_t len)
{
static bool notAvailableFlag = false;
static uint32_t lastNotAvailableMillis;
Client* c = (Client*)ctx;
if (!c->connected() && !c->available()) {
return -1; // connection lost or closed by peer (in ssl_io.c low_read, which points to this function, fails on a -1. which it should if a connection is lost)
}
int result = c->read(buf, len);
if (result == 0) {
if(notAvailableFlag) {
if(millis() - lastNotAvailableMillis > c->getTimeout()) {
notAvailableFlag = false; // for the next round
return -1; // timout read (in ssl_io.c low_read, which points to this function, fails on a -1. which it should if a connection is lost or closed by peer)
}
} else {
notAvailableFlag = true; // First time no data available
lastNotAvailableMillis = millis();
}
delay(10); // Needed?
} else {
notAvailableFlag = false; // This flag was set but new data is available, so start again
}
#ifdef DEBUGSERIAL
DEBUGSERIAL.print("BearSSLClient::clientRead - ");
DEBUGSERIAL.print(result);
DEBUGSERIAL.print(" - ");
for (size_t i = 0; i < result; i++) {
byte b = buf[i];
if (b < 16) {
DEBUGSERIAL.print("0");
}
DEBUGSERIAL.print(b, HEX);
}
DEBUGSERIAL.println();
#endif
return result;
}
int BearSSLClient::clientWrite(void *ctx, const unsigned char *buf, size_t len)
{
static bool notAvailableForWriteFlag = false;
static uint32_t lastNotAvailableForWriteMillis;
Client* c = (Client*)ctx;
if (!c->connected()) {
return -1; // connection lost or closed by peer (in ssl_io.c low_write, which points to this function, fails on a -1. which it should if a connection is lost)
}
int result = c->write(buf, len);
if (result == 0) {
if(notAvailableForWriteFlag) {
if(millis() - lastNotAvailableForWriteMillis > c->getTimeout()) {
notAvailableForWriteFlag = false; // for the next round
return -1; // timout write (in ssl_io.c low_write, which points to this function, fails on a -1. which it should if a connection is lost or closed by peer)
}
} else {
notAvailableForWriteFlag = true; // First time impossible to write data to peer
lastNotAvailableForWriteMillis = millis();
}
delay(10); // Needed?
} else {
notAvailableForWriteFlag = false; // This flag was set but new data was written, so start again
}
#ifdef DEBUGSERIAL
DEBUGSERIAL.print("BearSSLClient::clientWrite - ");
DEBUGSERIAL.print(len);
DEBUGSERIAL.print(" - ");
for (size_t i = 0; i < len; i++) {
byte b = buf[i];
if (b < 16) {
DEBUGSERIAL.print("0");
}
DEBUGSERIAL.print(b, HEX);
}
DEBUGSERIAL.println();
#endif
return result;
}
Thank you for this great library. It works great but is using more than 60% of my available RAM. Is there any way to reduce the BearSSL memory usage (with compilation or linking options, removing some BearSSL source code ...etc)?
Hi @per1234 ๐ I was wondering if you could add the usual Arduino CI support package for this repository? I just noticed that we don't have any CI in place here.
Needed for MQTT to AWS IoT per https://docs.aws.amazon.com/iot/latest/developerguide/protocols.html (if you have the default MQTTs port filtered out).
Support is in BearSSL, so it should just be a matter of exposing the possibility to configure.
hello friend
how can I use this function so that it recevies Auto handshake without certificate???
exp : when using class esp8266secure can get data handshake & its dosent need cert.h class or function & gets the certificate automaticaly the same as chrome browser when searching the web site
thx
In BearSSLClient.h line 40-45 the values for BEAR_SSL_CLIENT_OBUF_SIZE
and BEAR_SSL_CLIENT_IBUF_SIZE
are calculated.
ArduinoBearSSL/src/BearSSLClient.h
Lines 40 to 46 in 5c27869
By writing so, BEAR_SSL_CLIENT_OBUF_SIZE
will be computed to be 512+85 = 597.
I would expect BEAR_SSL_CLIENT_IBUF_SIZE
to be 8192 + 85 + 325 - 597 = 8005
But by using defines the code for BEAR_SSL_CLIENT_IBUF_SIZE
actually compiles to 8192 + 85 + 325 - 512 + 85 = 8175
I don't know if this is intended behaviour. If it's not, things can be fixed by just adding some parenthesis
#ifndef BEAR_SSL_CLIENT_OBUF_SIZE
#define BEAR_SSL_CLIENT_OBUF_SIZE (512 + 85)
#endif
#ifndef BEAR_SSL_CLIENT_IBUF_SIZE
#define BEAR_SSL_CLIENT_IBUF_SIZE (8192 + 85 + 325 - BEAR_SSL_CLIENT_OBUF_SIZE)
#endif
Besides the canned examples (in another libary) there is no documentation how to use the library or support in the forum.
BearSSL reference is not a 1 for 1 match for the functions in this library so it can not be readily referenced.
Some basic documentation or usable references would be helpful.
Thanks
Bruce
Do you plan on making a new release any time soon?
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