[Enhancement]: Support ECDSA certificates for aws_acm_certificate resources

[robmoss2k]

Description

As of 2022-11-08, ACM supports ECDSA certificates. Please add support for this parameter.

Affected Resource(s) and/or Data Source(s)

aws_acm_certificate resource
aws_acm_certificate data source

Potential Terraform Configuration

resource "aws_acm_certificate" "ecdsa" {
  ...
  key_algorithm = "EC_prime256v1"
}

References

https://aws.amazon.com/about-aws/whats-new/2022/11/aws-certificate-manager-elliptic-curve-digital-signature-algorithm-tls-certificates/
https://docs.aws.amazon.com/acm/latest/userguide/acm-certificate.html#algorithms
https://docs.aws.amazon.com/acm/latest/APIReference/API_RequestCertificate.html#API_RequestCertificate_RequestSyntax

Would you like to implement a fix?

I wouldn't know how.

[github-actions]

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[ewbankkit]

Requires AWS SDK for Go v1.44.133: #27712.

[JamesJJ]

PR #27781 should resolve this for the aws_acm_certificate resource, and allow you to request ECDSA certificates from ACM.

Personally, I'd suggest combining the existing data source with the tls_certificate data source if you need to determine the algorithm of an ACM certificate that was created/imported outside of terraform, for example:

data "aws_acm_certificate" "example" {
  domain    = "www.example.com"
  types     = ["AMAZON_ISSUED"]
  key_types = ["RSA_2048", "EC_prime256v1", "EC_secp384r1"]
}

data "tls_certificate" "example" {
  content = data.aws_acm_certificate.example.certificate
}

output "signature_algorithm" {
  value = data.tls_certificate.example.certificates[0].signature_algorithm
}

Outputs:

signature_algorithm = "ECDSA-SHA256"