We have a RESTful webservices application running on AWS EC2 instance.We have a requirement for calling a third party api,which needs JWT token signed with CA certificate to trust our api call.We have created CA certificate using Amazon certificate manager and imported it in Amazon ELB containing the ec2 instance. How can we access the private key of the certificate from our application for signing the JWT token?
You cannot access the private key for the certificates stored in ACM. You will need to acquire a CA certificate for signing the JWT. Then install the certificate on your EC2 instance so that the signing code can access it.
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Looking to use a custom certificate for in-transit encryption between the EMR nodes. Since I'm not using DHCP option set with own domain, the EMR instances will have their private DNS of the type *.us-west-1.compute.internal
Is it worth issuing a certificate (corp CA) to cover *.us-west-1.compute.internal and use that certificate for encryption? Would this certificate provide better security comparing to a self-signed certificate with the same CN?
I have an application which uses the certificate from Java key store which is physically stored on ec2 machine.I want to use the certificate from ACM directly at runtime without storing it on ec2 server.
You can't export AWS ACM certificates. From docs:
You cannot export a publicly trusted ACM certificate or its private key.
If you want to use them with your instances, you either have to front it with load balancer or CloudFront where you can deploy the ACM certs. Other options on how you can use ACM are listed here.
I'm trying to import the certificate of domain from AWS certificate manager (ACM) on one account to another ... How can I do that ?
You can't export an ACM certificate from one AWS Region to another or from one AWS account to another. This is because the default AWS Key Management Service (AWS KMS) key used to encrypt the private key of the certificate is unique for each AWS Region and AWS account. For more information, see ACM private key security.
You can create multiple ACM certificates with the same domain name across different AWS Regions and accounts. You can then use these certificates with services that run on AWS Certificate Manager.
useful link: https://aws.amazon.com/premiumsupport/knowledge-center/acm-export-certificate/
We are thinking of using our own Private Certificate Authority within AWS. Using the information provided here were able to create a private certificate and import it into ACM. However when we try to refer this private certificate when creating a Custom Domain in ApiGateway(via terraform) we get an error that the certificate does not exist. If we try to create the custom domain via the AWS console, the certificate doesnt show up at all.. Do certificates have any iam policy associated with them?
ACM's Private Certificate Authority is only for internal use within your company:
This service is for enterprise customers building a public key infrastructure (PKI) inside the AWS cloud and intended for private use within an organization
Certificates issued by a private CA are trusted only within your organization, not on the internet.
You can't use them on API Gateway. For that you require public certificates which you can get for free from ACM.
If your private certificate is managed by ACM, you should be able to use it on API gateway:
With ACM Private CA you can choose to delegate certificate management to ACM for certificates used with ACM-integrated services, such as Elastic Load Balancing and API Gateway.
We have a application running in Windows EC2 and we dont have any ELB or ALB for the application.
Can we use AWS private CA on this?
Please refer this URL:
https://docs.aws.amazon.com/acm/latest/userguide/acm-services.html
As per this URL, we must use Elastic load balancing/Amazon cloud Front/ AWS Elastic Beanstalk/ Amazon API Gateway AWS CloudFormation services to integrate AWS certificate manager. We are not using any of these services in our application.
Thanks,
Subhadeep
ACM Private CA certificates can be used with any platform, inside or outside of AWS, but this service creates a private certificate authority -- for use in a private infrastructure, like a corporate network.
This is not something used for public web sites.
A private CA handles the issuance, validation and revocation of private certificates within a private network (i.e. not the public internet).
https://aws.amazon.com/certificate-manager/faqs/#acm-private-ca