feat: Ability to enable DNSSEC for Route53 zone

modules/zones/README.md

@@ -24,7 +24,11 @@ No modules.
 
 | Name | Type |
 |------|------|
+| [aws_kms_key.this](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/kms_key) | resource |
+| [aws_route53_hosted_zone_dnssec.this](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/route53_hosted_zone_dnssec) | resource |
+| [aws_route53_key_signing_key.this](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/route53_key_signing_key) | resource |
 | [aws_route53_zone.this](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/route53_zone) | resource |
+| [aws_caller_identity.current](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/data-sources/caller_identity) | data source |
 
 ## Inputs
 

modules/zones/main.tf

@@ -1,3 +1,5 @@
+data "aws_caller_identity" "current" {}
+
 resource "aws_route53_zone" "this" {
   for_each = { for k, v in var.zones : k => v if var.create }
 
@@ -21,3 +23,77 @@ resource "aws_route53_zone" "this" {
     var.tags
   )
 }
+
+resource "aws_kms_key" "this" {
+  for_each = {
+    for k, v in var.zones :
+    k => v
+    if var.create
+    && lookup(v, "dnssec", null) == "enable"
+    && lookup(v, "ksk", null) == null
+  }
+
+  customer_master_key_spec = "ECC_NIST_P256"
+  deletion_window_in_days  = 7
+  key_usage                = "SIGN_VERIFY"
+  policy = jsonencode({
+    Statement = [
+      {
+        Action = [
+          "kms:DescribeKey",
+          "kms:GetPublicKey",
+          "kms:Sign",
+          "kms:Verify",
+        ],
+        Effect = "Allow"
+        Principal = {
+          Service = "dnssec-route53.amazonaws.com"
+        }
+        Resource = "*"
+        Sid      = "Allow Route 53 DNSSEC Service for ${lookup(each.value, "domain_name", each.key)}",
+      },
+      {
+        Action = "kms:*"
+        Effect = "Allow"
+        Principal = {
+          AWS = "arn:aws:iam::${data.aws_caller_identity.current.account_id}:root"
+        }
+        Resource = "*"
+        Sid      = "Enable IAM User Permissions for ${lookup(each.value, "domain_name", each.key)}"
+      },
+    ]
+    Version = "2012-10-17"
+  })
+
+  tags = merge(
+    lookup(each.value, "tags", {}),
+    var.tags
+  )
+}
+
+resource "aws_route53_key_signing_key" "this" {
+  for_each = {
+    for k, v in var.zones :
+    k => v
+    if var.create
+    && lookup(v, "dnssec", null) == "enable"
+  }
+
+  hosted_zone_id             = aws_route53_zone.this["${each.key}"].id
+  key_management_service_arn = !(length(lookup(each.value, "ksk", "")) > 0) ? try(aws_kms_key.this["${each.key}"].arn, null) : try(var.zones["${each.key}"].ksk, null)
+  name                       = aws_route53_zone.this["${each.key}"].name
+}
+
+resource "aws_route53_hosted_zone_dnssec" "this" {
+  for_each = {
+    for k, v in var.zones :
+    k => v
+    if var.create
+    && lookup(v, "dnssec", null) == "enable"
+  }
+
+  depends_on = [
+    aws_route53_key_signing_key.this
+  ]
+  hosted_zone_id = aws_route53_key_signing_key.this["${each.key}"].hosted_zone_id
+}