75 lines
2.1 KiB
Go
75 lines
2.1 KiB
Go
// Copyright 2020 the Pinniped contributors. All Rights Reserved.
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// SPDX-License-Identifier: Apache-2.0
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// Package config contains functionality to load/store api.Config's from/to
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// some source.
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package config
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import (
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"fmt"
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"io/ioutil"
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"sigs.k8s.io/yaml"
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"github.com/suzerain-io/pinniped/internal/constable"
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"github.com/suzerain-io/pinniped/pkg/config/api"
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)
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const (
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aboutAYear = 60 * 60 * 24 * 365
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about9Months = 60 * 60 * 24 * 30 * 9
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)
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// FromPath loads an api.Config from a provided local file path, inserts any
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// defaults (from the api.Config documentation), and verifies that the config is
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// valid (per the api.Config documentation).
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//
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// Note! The api.Config file should contain base64-encoded WebhookCABundle data.
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// This function will decode that base64-encoded data to PEM bytes to be stored
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// in the api.Config.
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func FromPath(path string) (*api.Config, error) {
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data, err := ioutil.ReadFile(path)
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if err != nil {
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return nil, fmt.Errorf("read file: %w", err)
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}
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var config api.Config
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if err := yaml.Unmarshal(data, &config); err != nil {
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return nil, fmt.Errorf("decode yaml: %w", err)
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}
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maybeSetAPIDefaults(&config.APIConfig)
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if err := validateAPI(&config.APIConfig); err != nil {
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return nil, fmt.Errorf("validate api: %w", err)
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}
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return &config, nil
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}
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func maybeSetAPIDefaults(apiConfig *api.APIConfigSpec) {
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if apiConfig.ServingCertificateConfig.DurationSeconds == nil {
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apiConfig.ServingCertificateConfig.DurationSeconds = int64Ptr(aboutAYear)
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}
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if apiConfig.ServingCertificateConfig.RenewBeforeSeconds == nil {
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apiConfig.ServingCertificateConfig.RenewBeforeSeconds = int64Ptr(about9Months)
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}
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}
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func validateAPI(apiConfig *api.APIConfigSpec) error {
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if *apiConfig.ServingCertificateConfig.DurationSeconds < *apiConfig.ServingCertificateConfig.RenewBeforeSeconds {
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return constable.Error("durationSeconds cannot be smaller than renewBeforeSeconds")
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}
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if *apiConfig.ServingCertificateConfig.RenewBeforeSeconds <= 0 {
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return constable.Error("renewBefore must be positive")
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}
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return nil
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}
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func int64Ptr(i int64) *int64 {
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return &i
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}
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