Add PrivateCA CertificateAuthority data source (#5750) (#11182)

* Add CA ds

* Provider

* Fmt

* Add CA datasource

* Write docs

* Check err

Signed-off-by: Modular Magician <magic-modules@google.com>

.changelog/5750.txt

@@ -0,0 +1,3 @@
+```release-note:new-datasource
+google_privateca_certificate_authority
+```

google/data_source_certificate_authority.go

@@ -0,0 +1,76 @@
+package google
+
+import (
+	"fmt"
+
+	"github.com/hashicorp/terraform-plugin-sdk/v2/helper/schema"
+)
+
+func dataSourcePrivatecaCertificateAuthority() *schema.Resource {
+	dsSchema := datasourceSchemaFromResourceSchema(resourcePrivatecaCertificateAuthority().Schema)
+	addOptionalFieldsToSchema(dsSchema, "project")
+	addOptionalFieldsToSchema(dsSchema, "location")
+	addOptionalFieldsToSchema(dsSchema, "pool")
+	addOptionalFieldsToSchema(dsSchema, "certificate_authority_id")
+
+	dsSchema["pem_csr"] = &schema.Schema{
+		Type:     schema.TypeString,
+		Computed: true,
+	}
+
+	return &schema.Resource{
+		Read:   dataSourcePrivatecaCertificateAuthorityRead,
+		Schema: dsSchema,
+	}
+}
+
+func dataSourcePrivatecaCertificateAuthorityRead(d *schema.ResourceData, meta interface{}) error {
+	config := meta.(*Config)
+	userAgent, err := generateUserAgentString(d, config.userAgent)
+	if err != nil {
+		return fmt.Errorf("Error generating user agent: %s", err)
+	}
+
+	id, err := replaceVars(d, config, "projects/{{project}}/locations/{{location}}/caPools/{{pool}}/certificateAuthorities/{{certificate_authority_id}}")
+	if err != nil {
+		return fmt.Errorf("Error constructing id: %s", err)
+	}
+
+	d.SetId(id)
+
+	err = resourcePrivatecaCertificateAuthorityRead(d, meta)
+	if err != nil {
+		return err
+	}
+
+	// pem_csr is only applicable for SUBORDINATE CertificateAuthorities
+	if d.Get("type") == "SUBORDINATE" {
+		url, err := replaceVars(d, config, "{{PrivatecaBasePath}}projects/{{project}}/locations/{{location}}/caPools/{{pool}}/certificateAuthorities/{{certificate_authority_id}}:fetch")
+		if err != nil {
+			return err
+		}
+
+		billingProject := ""
+
+		project, err := getProject(d, config)
+		if err != nil {
+			return fmt.Errorf("Error fetching project for CertificateAuthority: %s", err)
+		}
+		billingProject = project
+
+		// err == nil indicates that the billing_project value was found
+		if bp, err := getBillingProject(d, config); err == nil {
+			billingProject = bp
+		}
+
+		res, err := sendRequest(config, "GET", billingProject, url, userAgent, nil)
+		if err != nil {
+			return handleNotFoundError(err, d, fmt.Sprintf("PrivatecaCertificateAuthority %q", d.Id()))
+		}
+		if err := d.Set("pem_csr", res["pemCsr"]); err != nil {
+			return fmt.Errorf("Error fetching CertificateAuthority: %s", err)
+		}
+	}
+
+	return nil
+}

google/data_source_certificate_authority_test.go

@@ -0,0 +1,94 @@
+package google
+
+import (
+	"testing"
+
+	"github.com/hashicorp/terraform-plugin-sdk/v2/helper/resource"
+)
+
+func TestAccDataSourcePrivatecaCertificateAuthority_privatecaCertificateAuthorityBasicExample(t *testing.T) {
+	t.Parallel()
+
+	context := map[string]interface{}{
+		"pool_name":     BootstrapSharedCaPoolInLocation(t, "us-central1"),
+		"pool_location": "us-central1",
+		"random_suffix": randString(t, 10),
+	}
+
+	vcrTest(t, resource.TestCase{
+		PreCheck:     func() { testAccPreCheck(t) },
+		Providers:    testAccProviders,
+		CheckDestroy: testAccCheckPrivatecaCertificateAuthorityDestroyProducer(t),
+		Steps: []resource.TestStep{
+			{
+				Config: testAccDataSourcePrivatecaCertificateAuthority_privatecaCertificateAuthorityBasicExample(context),
+				Check: resource.ComposeTestCheckFunc(
+					resource.TestCheckResourceAttrSet("data.google_privateca_certificate_authority.default", "pem_csr"),
+				),
+			},
+		},
+	})
+}
+
+func testAccDataSourcePrivatecaCertificateAuthority_privatecaCertificateAuthorityBasicExample(context map[string]interface{}) string {
+	return Nprintf(`
+resource "google_privateca_certificate_authority" "default" {
+  // This example assumes this pool already exists.
+  // Pools cannot be deleted in normal test circumstances, so we depend on static pools
+  pool = "%{pool_name}"
+  certificate_authority_id = "tf-test-my-certificate-authority%{random_suffix}"
+  location = "%{pool_location}"
+  type = "SUBORDINATE"
+  config {
+    subject_config {
+      subject {
+        organization = "HashiCorp"
+        common_name = "my-certificate-authority"
+      }
+      subject_alt_name {
+        dns_names = ["hashicorp.com"]
+      }
+    }
+    x509_config {
+      ca_options {
+        is_ca = true
+        max_issuer_path_length = 10
+      }
+      key_usage {
+        base_key_usage {
+          digital_signature = true
+          content_commitment = true
+          key_encipherment = false
+          data_encipherment = true
+          key_agreement = true
+          cert_sign = true
+          crl_sign = true
+          decipher_only = true
+        }
+        extended_key_usage {
+          server_auth = true
+          client_auth = false
+          email_protection = true
+          code_signing = true
+          time_stamping = true
+        }
+      }
+    }
+  }
+  lifetime = "86400s"
+  key_spec {
+    algorithm = "RSA_PKCS1_4096_SHA256"
+  }
+}
+
+data "google_privateca_certificate_authority" "default" {
+	location = google_privateca_certificate_authority.default.location
+	pool = google_privateca_certificate_authority.default.pool
+	certificate_authority_id = google_privateca_certificate_authority.default.certificate_authority_id
+}
+
+output "csr" {
+	value = data.google_privateca_certificate_authority.default.pem_csr
+}
+`, context)
+}

google/provider.go

@@ -786,6 +786,7 @@ func Provider() *schema.Provider {
 			"google_monitoring_uptime_check_ips":                  dataSourceGoogleMonitoringUptimeCheckIps(),
 			"google_netblock_ip_ranges":                           dataSourceGoogleNetblockIpRanges(),
 			"google_organization":                                 dataSourceGoogleOrganization(),
+			"google_privateca_certificate_authority":              dataSourcePrivatecaCertificateAuthority(),
 			"google_project":                                      dataSourceGoogleProject(),
 			"google_projects":                                     dataSourceGoogleProjects(),
 			"google_project_organization_policy":                  dataSourceGoogleProjectOrganizationPolicy(),

website/docs/d/privateca_certificate_authority.html.markdown

@@ -0,0 +1,47 @@
+---
+subcategory: "Certificate Authority Service"
+layout: "google"
+page_title: "Google: google_privateca_certificate_authority"
+sidebar_current: "docs-google-datasource-privateca-certificate-authority"
+description: |-
+  Contains the data that describes a Certificate Authority
+---
+# google_privateca_certificate_authority
+
+Get info about a Google Cloud IAP Client.
+
+## Example Usage
+
+```tf
+data "google_privateca_certificate_authority" "default" {
+  location = "us-west1"
+  pool = "pool-name"
+  certificate_authority_id = "ca-id"
+}
+
+output "csr" {
+  value = data.google_privateca_certificate_authority.default.pem_csr
+}
+
+```
+
+## Argument Reference
+
+The following arguments are supported:
+
+* `location` - (Required) The location the certificate authority exists in.
+
+* `pool` - (Required) The name of the pool the certificate authority belongs to.
+
+* `certificate_authority_id` - (Required) ID of the certificate authority.
+
+- - -
+
+* `project` - (Optional) The ID of the project in which the resource belongs. If it
+    is not provided, the provider project is used.
+
+## Attributes Reference
+
+See [google_privateca_certificate_authority](https://registry.terraform.io/providers/hashicorp/google/latest/docs/resources/privateca_certificate_authority) resource for details of the available attributes.
+
+* `pem_csr` - The PEM-encoded signed certificate signing request (CSR). This is only set on subordinate certificate authorities.

website/google.erb

@@ -409,6 +409,16 @@
     <li>
     <a href="#">Certificate Authority Service</a>
     <ul class="nav">
+      <li>
+        <a href="#">Data Sources</a>
+        <ul class="nav nav-auto-expand">
+
+          <li>
+          <a href="/docs/providers/google/d/privateca_certificate_authority.html">google_privateca_certificate_authority</a>
+          </li>
+
+        </ul>
+      </li>
       <li>
         <a href="#">Resources</a>
         <ul class="nav nav-auto-expand">