examples: update default root-ca for aws_iot demos

diff --git a/examples/protocols/aws_iot/README.md b/examples/protocols/aws_iot/README.md
index e64fcc8b5772fc28c96c4909f56bf2a00b457753..4a898d1df5189a893654718fc7c54b0d763d4da0 100644 (file)
--- a/examples/protocols/aws_iot/README.md
+++ b/examples/protocols/aws_iot/README.md
@@ -14,6 +14,16 @@ The [Getting Started section of the AWS IoT Developer Guide](http://docs.aws.ama
 
 To build and use this example, follow all the AWS IoT Getting Started steps from the beginning ("Sign in to the AWS Iot Console") up until "Configuring Your Device". For configuring the device, these are the steps:
 
+# Authentication (Based on X.509 certificates)
+
+### Device Authentication
+
+AWS IoT can use AWS IoT-generated certificates or certificates signed by a CA certificate for device authentication. To use a certificate that is not created by AWS IoT, you must register a CA certificate. All device certificates must be signed by the CA certificate you register. Please refer to guide at https://docs.aws.amazon.com/iot/latest/developerguide/device-certs-your-own.html for step-by-step instructions to register custom X.509 certificates.
+
+### Server Authentication
+
+Server certificates allow devices to verify that they're communicating with AWS IoT and not another server impersonating AWS IoT. By default [Amazon Root CA 1](https://www.amazontrust.com/repository/AmazonRootCA1.pem) (signed by Amazon Trust Services Endpoints CA) is embedded in applications, for more information please refer to https://docs.aws.amazon.com/iot/latest/developerguide/managing-device-certs.html#server-authentication
+
 ## Configuring Your Device
 
 ### Installing Private Key & Certificate

diff --git a/examples/protocols/aws_iot/subscribe_publish/main/certs/aws-root-ca.pem b/examples/protocols/aws_iot/subscribe_publish/main/certs/aws-root-ca.pem
index b9514c5894990c0901ee242423bf12711e93b23a..a6f3e92af58ab857bfb8b8659de897ba069768a2 100644 (file)
--- a/examples/protocols/aws_iot/subscribe_publish/main/certs/aws-root-ca.pem
+++ b/examples/protocols/aws_iot/subscribe_publish/main/certs/aws-root-ca.pem
@@ -1,28 +1,20 @@
 -----BEGIN CERTIFICATE-----
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------END CERTIFICATE-----
\ No newline at end of file
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+-----END CERTIFICATE-----

diff --git a/examples/protocols/aws_iot/thing_shadow/main/certs/aws-root-ca.pem b/examples/protocols/aws_iot/thing_shadow/main/certs/aws-root-ca.pem
index b9514c5894990c0901ee242423bf12711e93b23a..a6f3e92af58ab857bfb8b8659de897ba069768a2 100644 (file)
--- a/examples/protocols/aws_iot/thing_shadow/main/certs/aws-root-ca.pem
+++ b/examples/protocols/aws_iot/thing_shadow/main/certs/aws-root-ca.pem
@@ -1,28 +1,20 @@
 -----BEGIN CERTIFICATE-----
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------END CERTIFICATE-----
\ No newline at end of file
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+-----END CERTIFICATE-----