seahaven-site/terraform/s3.tf

resource "aws_s3_bucket" "origin" {
  bucket = local.bucket_name
}

resource "aws_s3_bucket_public_access_block" "origin" {
  bucket = aws_s3_bucket.origin.id

  block_public_acls       = true
  block_public_policy     = true
  ignore_public_acls      = true
  restrict_public_buckets = true
}

resource "aws_s3_bucket_ownership_controls" "origin" {
  bucket = aws_s3_bucket.origin.id

  rule {
    object_ownership = "BucketOwnerEnforced"
  }
}

resource "aws_s3_bucket_server_side_encryption_configuration" "origin" {
  bucket = aws_s3_bucket.origin.id

  rule {
    apply_server_side_encryption_by_default {
      sse_algorithm = "AES256"
    }
  }
}

resource "aws_s3_bucket_versioning" "origin" {
  bucket = aws_s3_bucket.origin.id

  versioning_configuration {
    status = "Enabled"
  }
}

data "aws_iam_policy_document" "origin_ssl_only" {
  statement {
    sid    = "DenyInsecureTransport"
    effect = "Deny"

    principals {
      type        = "*"
      identifiers = ["*"]
    }

    actions = ["s3:*"]
    resources = [
      aws_s3_bucket.origin.arn,
      "${aws_s3_bucket.origin.arn}/*",
    ]

    condition {
      test     = "Bool"
      variable = "aws:SecureTransport"
      values   = ["false"]
    }
  }

  statement {
    sid    = "AllowCloudFrontOacRead"
    effect = "Allow"

    principals {
      type        = "Service"
      identifiers = ["cloudfront.amazonaws.com"]
    }

    actions = [
      "s3:GetObject",
    ]
    resources = [
      "${aws_s3_bucket.origin.arn}/*",
    ]

    condition {
      test     = "StringEquals"
      variable = "AWS:SourceArn"
      values   = [aws_cloudfront_distribution.site.arn]
    }
  }
}

resource "aws_s3_bucket_policy" "origin" {
  bucket = aws_s3_bucket.origin.id
  policy = data.aws_iam_policy_document.origin_ssl_only.json
}