test(e2e): Provide public ca key to UI tests (#4478)

enos/modules/test_e2e_ui/main.tf

@@ -63,6 +63,16 @@ variable "target_port" {
   type        = string
   default     = ""
 }
+variable "target_ca_key" {
+  description = "CA Private Key (base64 encoded)"
+  type        = string
+  default     = ""
+}
+variable "target_ca_key_public" {
+  description = "CA Public Key (base64 encoded)"
+  type        = string
+  default     = ""
+}
 variable "vault_addr" {
   description = "External network address of Vault. Will be converted to a URL below"
   type        = string
@@ -161,6 +171,8 @@ resource "enos_local_exec" "run_e2e_test" {
     E2E_TARGET_PORT               = var.target_port
     E2E_SSH_USER                  = var.target_user
     E2E_SSH_KEY_PATH              = local.aws_ssh_private_key_path
+    E2E_SSH_CA_KEY                = var.target_ca_key
+    E2E_SSH_CA_KEY_PUBLIC         = var.target_ca_key_public
     VAULT_ADDR                    = local.vault_addr
     VAULT_TOKEN                   = var.vault_root_token
     E2E_VAULT_ADDR                = local.vault_addr_internal