Hello,
I was wondering if you could help me with an issue I am having regarding making https requests. My code seems to crash whenever I make an https request with esp_http_client but works fine for http requests. As an aside, I followed the instructions from this post to import esp_http_client.
Below is my task that runs once a wifi connection is established:
void send_http_request(void *arg){
ulTaskNotifyTake(pdTRUE, portMAX_DELAY);
esp_http_client_config_t http_config = {
.url = "https://www.howsmyssl.com",
.event_handler = http_event_handle,
.method = HTTP_METHOD_GET,
.cert_pem = "-----BEGIN CERTIFICATE-----\n ..."
};
esp_http_client_handle_t client = esp_http_client_init(&http_config);
ESP_LOGI(WIFI_TASK_NAME, "Watermark: %i, free heap size: %i, %i", uxTaskGetStackHighWaterMark(NULL),
esp_get_free_heap_size(),
esp_get_minimum_free_heap_size());
esp_err_t err = esp_http_client_perform(client);
if (err == ESP_OK) {
ESP_LOGI(WIFI_TASK_NAME, "Status = %d, content_length = %d",
esp_http_client_get_status_code(client),
esp_http_client_get_content_length(client));
}else{
ESP_LOGI(WIFI_TASK_NAME, "send_http_request(): %i, %s", err, esp_err_to_name(err));
}
esp_http_client_cleanup(client);
for(;;){}
}
The code seems to crash on the following line:
esp_err_t err = esp_http_client_perform(client);
with the following console output:
I (918) WIFI_TASK: Event = 0004
I (918) WIFI_TASK: SYSTEM_EVENT_STA_CONNECTED
I (3328) event: sta ip: 192.168.7.104, mask: 255.255.255.0, gw: 192.168.7.1
I (3328) WIFI_TASK: Event = 0007
I (3328) WIFI_TASK: SYSTEM_EVENT_STA_GOT_IP:192.168.7.104
I (3338) WIFI_TASK: Watermark: 2520, free heap size: 229772, 219344
E (3448) esp-tls: mbedtls_ssl_handshake returned -0x1c
I (3448) esp-tls: Certificate verified.
Guru Meditation Error: Core 0 panic'ed (LoadProhibited). Exception was unhandled.
Core 0 register dump:
PC : 0x40127124 PS : 0x00060a30 A0 : 0x80127a8d A1 : 0x3ffb95a0
xtensa-esp32-elf-addr2line -pfiaC -e /Users/vp/esp/Pebble_ESP32_Firmware/build/esp32_app 0x40127124: [Errno 2] No such file or directory
A2 : 0xc6351bff A3 : 0x00000190 A4 : 0x3ffb9510 A5 : 0x0000000c
A6 : 0x3ffb9260 A7 : 0x00000003 A8 : 0x80123660 A9 : 0x3ffb9590
A10 : 0xc6351bff A11 : 0x00000000 A12 : 0x00000190 A13 : 0x3ffba36c
A14 : 0x3ffb91d0 A15 : 0x00000019 SAR : 0x00000004 EXCCAUSE: 0x0000001c
EXCVADDR: 0xc6351c07 LBEG : 0x4000c46c LEND : 0x4000c477 LCOUNT : 0x00000000
xtensa-esp32-elf-addr2line -pfiaC -e /Users/vp/esp/Pebble_ESP32_Firmware/build/esp32_app 0x4000c46c: [Errno 2] No such file or directory
xtensa-esp32-elf-addr2line -pfiaC -e /Users/vp/esp/Pebble_ESP32_Firmware/build/esp32_app 0x4000c477: [Errno 2] No such file or directory
ELF file SHA256: e1b2cfd4353c7e3aaee1938c143dae2d2a224974d3f4b14c207552fa68671d98
Backtrace: 0x40127124:0x3ffb95a0 0x40127a8a:0x3ffb95c0 0x4015473c:0x3ffb95e0 0x40154f7b:0x3ffb9600 0x40154fbf:0x3ffb9620 0x401542bb:0x3ffb9640 0x40157489:0x3ffb9660 0x4014c274:0x3ffb9680 0x4014c5df:0x3ffb96a0 0x400d6f75:0x3ffb96c0
xtensa-esp32-elf-addr2line -pfiaC -e /Users/vp/esp/Pebble_ESP32_Firmware/build/esp32_app 0x40127124: [Errno 2] No such file or directory
xtensa-esp32-elf-addr2line -pfiaC -e /Users/vp/esp/Pebble_ESP32_Firmware/build/esp32_app 0x40127a8a: [Errno 2] No such file or directory
xtensa-esp32-elf-addr2line -pfiaC -e /Users/vp/esp/Pebble_ESP32_Firmware/build/esp32_app 0x4015473c: [Errno 2] No such file or directory
xtensa-esp32-elf-addr2line -pfiaC -e /Users/vp/esp/Pebble_ESP32_Firmware/build/esp32_app 0x40154f7b: [Errno 2] No such file or directory
xtensa-esp32-elf-addr2line -pfiaC -e /Users/vp/esp/Pebble_ESP32_Firmware/build/esp32_app 0x40154fbf: [Errno 2] No such file or directory
xtensa-esp32-elf-addr2line -pfiaC -e /Users/vp/esp/Pebble_ESP32_Firmware/build/esp32_app 0x401542bb: [Errno 2] No such file or directory
xtensa-esp32-elf-addr2line -pfiaC -e /Users/vp/esp/Pebble_ESP32_Firmware/build/esp32_app 0x40157489: [Errno 2] No such file or directory
xtensa-esp32-elf-addr2line -pfiaC -e /Users/vp/esp/Pebble_ESP32_Firmware/build/esp32_app 0x4014c274: [Errno 2] No such file or directory
xtensa-esp32-elf-addr2line -pfiaC -e /Users/vp/esp/Pebble_ESP32_Firmware/build/esp32_app 0x4014c5df: [Errno 2] No such file or directory
xtensa-esp32-elf-addr2line -pfiaC -e /Users/vp/esp/Pebble_ESP32_Firmware/build/esp32_app 0x400d6f75: [Errno 2] No such file or directory
Rebooting...
ets Jun 8 2016 00:22:57
I generated my certificate using the following command:
openssl s_client -showcerts -connect https://httpbin.org/deflate </dev/null 2>/dev/null|openssl x509 -outform PEM >mycertfile.pem
and pasted into the http_config initialization.
I’ve narrowed it down to the following function call
case ESP_TLS_HANDSHAKE:
ESP_LOGD(TAG, "handshake in progress...");
ret = mbedtls_ssl_handshake(&tls->ssl);
...
which is located in
esp_tls.c
This is what returns the error code -0x1c.
Since that function errors it causes
esp_tls_conn_delete()
to be called in the follow code below (in the file esp_tls.c) and this crashes the system.
esp_tls_t *esp_tls_conn_new(const char *hostname, int hostlen, int port, const esp_tls_cfg_t *cfg)
{
esp_tls_t *tls = (esp_tls_t *)calloc(1, sizeof(esp_tls_t));
if (!tls) {
return NULL;
}
/* esp_tls_conn_new() API establishes connection in a blocking manner thus this loop ensures that esp_tls_conn_new()
API returns only after connection is established unless there is an error*/
while (1) {
int ret = esp_tls_low_level_conn(hostname, hostlen, port, cfg, tls);
if (ret == 1) {
return tls;
} else if (ret == -1) {
ESP_LOGE(TAG, "Failed to open new connection");
esp_tls_conn_delete(tls);
return NULL;
}
}
return NULL;
}
Things to Note
- The following line in the console log:
E (3448) esp-tls: mbedtls_ssl_handshake returned -0x1c
I (3448) esp-tls: Certificate verified.
and I think -0x1c represents the following errors
#define MBEDTLS_ERR_MPI_DIVISION_BY_ZERO -0x000C /**< The input argument for division is zero, which is not allowed. */
#define MBEDTLS_ERR_MPI_ALLOC_FAILED -0x0010 /**< Memory allocation failed. */
-
However I do print out the amount of space left on the line above and there does seem to be enough
-
I’m not sure why the following line keeps printing since the file does exist
/Users/vp/esp/Pebble_ESP32_Firmware/build/esp32_app 0x400d6f75: [Errno 2] No such file or directory
If anyone could help that would be great! Thanks!
sdkconfig
#
# mbedTLS
#
CONFIG_MBEDTLS_INTERNAL_MEM_ALLOC=y
CONFIG_MBEDTLS_DEFAULT_MEM_ALLOC=
CONFIG_MBEDTLS_CUSTOM_MEM_ALLOC=
CONFIG_MBEDTLS_ASYMMETRIC_CONTENT_LEN=y
CONFIG_MBEDTLS_SSL_IN_CONTENT_LEN=8192
CONFIG_MBEDTLS_SSL_OUT_CONTENT_LEN=4096
CONFIG_MBEDTLS_DEBUG=
CONFIG_MBEDTLS_ECP_RESTARTABLE=y
CONFIG_MBEDTLS_CMAC_C=y
CONFIG_MBEDTLS_HARDWARE_AES=y
CONFIG_MBEDTLS_HARDWARE_MPI=
CONFIG_MBEDTLS_HARDWARE_SHA=
CONFIG_MBEDTLS_HAVE_TIME=y
CONFIG_MBEDTLS_HAVE_TIME_DATE=
CONFIG_MBEDTLS_TLS_SERVER_AND_CLIENT=
CONFIG_MBEDTLS_TLS_SERVER_ONLY=
CONFIG_MBEDTLS_TLS_CLIENT_ONLY=y
CONFIG_MBEDTLS_TLS_DISABLED=
CONFIG_MBEDTLS_TLS_CLIENT=y
CONFIG_MBEDTLS_TLS_ENABLED=y
#
# TLS Key Exchange Methods
#
CONFIG_MBEDTLS_PSK_MODES=
CONFIG_MBEDTLS_KEY_EXCHANGE_RSA=y
CONFIG_MBEDTLS_KEY_EXCHANGE_DHE_RSA=y
CONFIG_MBEDTLS_KEY_EXCHANGE_ELLIPTIC_CURVE=y
CONFIG_MBEDTLS_KEY_EXCHANGE_ECDHE_RSA=y
CONFIG_MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA=y
CONFIG_MBEDTLS_KEY_EXCHANGE_ECDH_ECDSA=y
CONFIG_MBEDTLS_KEY_EXCHANGE_ECDH_RSA=y
CONFIG_MBEDTLS_SSL_RENEGOTIATION=y
CONFIG_MBEDTLS_SSL_PROTO_SSL3=
CONFIG_MBEDTLS_SSL_PROTO_TLS1=y
CONFIG_MBEDTLS_SSL_PROTO_TLS1_1=y
CONFIG_MBEDTLS_SSL_PROTO_TLS1_2=y
CONFIG_MBEDTLS_SSL_PROTO_DTLS=
CONFIG_MBEDTLS_SSL_ALPN=y
CONFIG_MBEDTLS_SSL_SESSION_TICKETS=y
#
# Symmetric Ciphers
#
CONFIG_MBEDTLS_AES_C=y
CONFIG_MBEDTLS_CAMELLIA_C=
CONFIG_MBEDTLS_DES_C=
CONFIG_MBEDTLS_RC4_DISABLED=y
CONFIG_MBEDTLS_RC4_ENABLED_NO_DEFAULT=
CONFIG_MBEDTLS_RC4_ENABLED=
CONFIG_MBEDTLS_BLOWFISH_C=
CONFIG_MBEDTLS_XTEA_C=
CONFIG_MBEDTLS_CCM_C=y
CONFIG_MBEDTLS_GCM_C=y
CONFIG_MBEDTLS_RIPEMD160_C=
#
# Certificates
#
CONFIG_MBEDTLS_PEM_PARSE_C=y
CONFIG_MBEDTLS_PEM_WRITE_C=y
CONFIG_MBEDTLS_X509_CRL_PARSE_C=y
CONFIG_MBEDTLS_X509_CSR_PARSE_C=y
CONFIG_MBEDTLS_ECP_C=y
CONFIG_MBEDTLS_ECDH_C=y
CONFIG_MBEDTLS_ECDSA_C=y
CONFIG_MBEDTLS_ECP_DP_SECP192R1_ENABLED=y
CONFIG_MBEDTLS_ECP_DP_SECP224R1_ENABLED=y
CONFIG_MBEDTLS_ECP_DP_SECP256R1_ENABLED=y
CONFIG_MBEDTLS_ECP_DP_SECP384R1_ENABLED=y
CONFIG_MBEDTLS_ECP_DP_SECP521R1_ENABLED=y
CONFIG_MBEDTLS_ECP_DP_SECP192K1_ENABLED=y
CONFIG_MBEDTLS_ECP_DP_SECP224K1_ENABLED=y
CONFIG_MBEDTLS_ECP_DP_SECP256K1_ENABLED=y
CONFIG_MBEDTLS_ECP_DP_BP256R1_ENABLED=y
CONFIG_MBEDTLS_ECP_DP_BP384R1_ENABLED=y
CONFIG_MBEDTLS_ECP_DP_BP512R1_ENABLED=y
CONFIG_MBEDTLS_ECP_DP_CURVE25519_ENABLED=y
CONFIG_MBEDTLS_ECP_NIST_OPTIM=y