Terraform (Windows) file to provision an AWS EC2 instance and associated RSA key pair then exports .pem SSH key to local device and outputs instance public IP for quick reference.

Terraform-Windows-SSH-KeyGen-Local.tf

/*
Created by CR11CS
https://github.com/CR11CS

Generates an SSH keypair and stores SSH key to local folder, then outputs your server public IP for quick reference.
Windows Compatible version (using PowerShell)
*/

############################ Generic Terraform AWS EC2 Config
terraform {
  required_version = "~>1.2.3"
  required_providers {
    aws = {
      source  = "hashicorp/aws"
      version = ">=4.16"
    }
  }
}

provider "aws" {
  region = "us-east-1"
}

resource "aws_instance" "example_server" {
  ami           = "ami-090fa75af13c156b4"
  instance_type = "t2.micro"
  key_name      = "myKey"
  // Waits for aws_key_pair resource generation first
  depends_on = [
    aws_key_pair.kp
  ]
}

// Output public IP for SSH
output "Server-IP" {
  value = aws_instance.example_server.public_ip
}

############################ AWS Key Pair Generate & Store Locally
resource "tls_private_key" "pk" {
  algorithm = "RSA"
  rsa_bits  = 4096
}

// Create aws_key_pair resource
resource "aws_key_pair" "kp" {
  key_name   = "myKey"
  public_key = chomp(tls_private_key.pk.public_key_openssh)

  // Executes local PowerShell code to write private key to local folder, same as downloading from EC2
  provisioner "local-exec" {
    command     = <<EOT
    '${tls_private_key.pk.private_key_pem}' | % {$_ -replace "`r", ""} | Set-Content -NoNewline ./'myKey.pem' -Force
    EOT
    interpreter = ["PowerShell", "-Command"]
  }
}