While Generating SAS token issue

[VamsidharP39]

While Generating the SAS token, the variable sas_token is not fully populated. Even i kept delay to populate the variable sas_token

Using ESP8266: 2.7.4, Azure SDk for C 1.0.0-beta 4,

I am getting the variable not printed or populated fully.

static int generateSasToken(char sas_token, size_t size, const char device_key_d) { az_span signature_span = az_span_create((uint8_t)signature, sizeofarray(signature)); az_span out_signature_span; Serial.print(F("Free heap:")); Serial.println(ESP.getFreeHeap()); az_span encrypted_signature_span = az_span_create((uint8_t)encrypted_signature, sizeofarray(encrypted_signature)); delay(5000); printf("\n SAS token0: %s", encrypted_signature_span); uint32_t expiration = getSecondsSinceEpoch() + ONE_HOUR_IN_SECS;

// Get signature if (az_result_failed(az_iot_hub_client_sas_get_signature( &client, expiration, signature_span, &out_signature_span))) { Serial.println("Failed getting SAS signature"); return 1; } delay(5000); printf("\n SAS token1: %s", out_signature_span); // Base64-decode device key int base64_decoded_device_key_length = base64_decode_chars(device_key_d, strlen(device_key_d), base64_decoded_device_key);

if (base64_decoded_device_key_length == 0) { Serial.println("Failed base64 decoding device key"); return 1; }

// SHA-256 encrypt br_hmac_key_context kc; br_hmac_key_init( &kc, &br_sha256_vtable, base64_decoded_device_key, base64_decoded_device_key_length);

br_hmac_context hmac_ctx; br_hmac_init(&hmac_ctx, &kc, 32); br_hmac_update(&hmac_ctx, az_span_ptr(out_signature_span), az_span_size(out_signature_span)); br_hmac_out(&hmac_ctx, encrypted_signature);

// Base64 encode encrypted signature String b64enc_hmacsha256_signature = base64::encode(encrypted_signature, br_hmac_size(&hmac_ctx));

az_span b64enc_hmacsha256_signature_span = az_span_create( (uint8_t*)b64enc_hmacsha256_signature.c_str(), b64enc_hmacsha256_signature.length());

// URl-encode base64 encoded encrypted signature if (az_result_failed(az_iot_hub_client_sas_get_password( &client, expiration, b64enc_hmacsha256_signature_span, AZ_SPAN_EMPTY, sas_token, size, NULL))) { Serial.println("Failed getting SAS token"); return 1; } delay(5000); printf("\n SAS token2: %s", sas_token); Serial.println("SAS token generated!! "); return 0; }

IP address: 192.168.1.20 Setting time using SNTP...............pm open,type:2 0 ............done! client initialize done!! Free heap:12328

SAS token0: SAS token1: SmartStokIotHub2018Aug21.azure-devices.net%2Fdevices%2Fcalibration 1657001749 SAS token2: SharedAccessSignature sr=SmartStokIotHub2018Aug21.azure-devices.net%2Fdevices%2Fcalibration&sig=L5XIcs20mDZ2hxuVW0KSAS token generated!! In else before calling connectToAzureIoTHub Client ID: calibration Username: SmartStokIotHub2018Aug21.azure-devices.net/calibration/?api-version=2020-09-30&DeviceClientType=c/1.3.1(ard;esp8266) MQTT connecting ... ebPjQn%2F9Cb7Niv6wcoa3AnXI%3D&se=1657001749 SAS token: SharedAccessSignature sr=SmartStokIotHub2018Aug21.azure-devices.net%2Fdevices%2Fcalibration&sig=L5XIcs20mDZ2hxuVW0Ke

[VamsidharP39]

Closing the issue as it got resolved.