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/**
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* Copyright 2023 Google LLC
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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# tfdoc:file:description Workload Identity Federation provider definitions.
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locals {
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identity_providers = {
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for k, v in var.federated_identity_providers : k => merge(
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v,
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lookup(local.identity_providers_defs, v.issuer, {})
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)
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}
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identity_providers_defs = {
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# https://docs.github.com/en/actions/deployment/security-hardening-your-deployments/about-security-hardening-with-openid-connect
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github = {
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attribute_mapping = {
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"google.subject" = "assertion.sub"
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"attribute.sub" = "assertion.sub"
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"attribute.actor" = "assertion.actor"
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"attribute.repository" = "assertion.repository"
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"attribute.repository_owner" = "assertion.repository_owner"
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"attribute.ref" = "assertion.ref"
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}
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issuer_uri = "https://token.actions.githubusercontent.com"
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principal_tpl = "principal://iam.googleapis.com/%s/subject/repo:%s:ref:refs/heads/%s"
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principalset_tpl = "principalSet://iam.googleapis.com/%s/attribute.repository/%s"
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}
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# https://docs.gitlab.com/ee/ci/secrets/id_token_authentication.html#token-payload
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gitlab = {
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attribute_mapping = {
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"google.subject" = "assertion.sub"
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"attribute.sub" = "assertion.sub"
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"attribute.environment" = "assertion.environment"
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"attribute.environment_protected" = "assertion.environment_protected"
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"attribute.namespace_id" = "assertion.namespace_id"
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"attribute.namespace_path" = "assertion.namespace_path"
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"attribute.pipeline_id" = "assertion.pipeline_id"
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"attribute.pipeline_source" = "assertion.pipeline_source"
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"attribute.project_id" = "assertion.project_id"
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"attribute.project_path" = "assertion.project_path"
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"attribute.repository" = "assertion.project_path"
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"attribute.ref" = "assertion.ref"
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"attribute.ref_protected" = "assertion.ref_protected"
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"attribute.ref_type" = "assertion.ref_type"
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}
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issuer_uri = "https://gitlab.com"
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principal_tpl = "principalSet://iam.googleapis.com/%s/attribute.sub/project_path:%s:ref_type:branch:ref:%s"
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principalset_tpl = "principalSet://iam.googleapis.com/%s/attribute.repository/%s"
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}
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}
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}
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resource "google_iam_workload_identity_pool" "default" {
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provider = google-beta
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count = length(local.identity_providers) > 0 ? 1 : 0
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project = module.automation-project.project_id
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workload_identity_pool_id = "${var.prefix}-bootstrap"
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}
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resource "google_iam_workload_identity_pool_provider" "default" {
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provider = google-beta
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for_each = local.identity_providers
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project = module.automation-project.project_id
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workload_identity_pool_id = (
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google_iam_workload_identity_pool.default.0.workload_identity_pool_id
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)
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workload_identity_pool_provider_id = "${var.prefix}-bootstrap-${each.key}"
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attribute_condition = each.value.attribute_condition
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attribute_mapping = each.value.attribute_mapping
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oidc {
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# Setting an empty list configures allowed_audiences to the url of the provider
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allowed_audiences = each.value.custom_settings.audiences
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# If users don't provide an issuer_uri, we set the public one for the plaform choosed.
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issuer_uri = (
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each.value.custom_settings.issuer_uri != null
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? each.value.custom_settings.issuer_uri
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: try(each.value.issuer_uri, null)
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)
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}
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}
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