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127 lines
3.6 KiB
Go
127 lines
3.6 KiB
Go
// Copyright (c) 2015-2021 MinIO, Inc.
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//
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// This file is part of MinIO Object Storage stack
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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package tls
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import (
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"strconv"
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"time"
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"github.com/minio/minio/internal/auth"
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"github.com/minio/minio/internal/config"
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"github.com/minio/pkg/env"
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)
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const (
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// EnvIdentityTLSEnabled is an environment variable that controls whether the X.509
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// TLS STS API is enabled. By default, if not set, it is enabled.
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EnvIdentityTLSEnabled = "MINIO_IDENTITY_TLS_ENABLE"
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// EnvIdentityTLSSkipVerify is an environment variable that controls whether
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// MinIO verifies the client certificate present by the client
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// when requesting temp. credentials.
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// By default, MinIO always verify the client certificate.
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//
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// The client certificate verification should only be skipped
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// when debugging or testing a setup since it allows arbitrary
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// clients to obtain temp. credentials with arbitrary policy
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// permissions - including admin permissions.
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EnvIdentityTLSSkipVerify = "MINIO_IDENTITY_TLS_SKIP_VERIFY"
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)
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// Config contains the STS TLS configuration for generating temp.
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// credentials and mapping client certificates to S3 policies.
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type Config struct {
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Enabled bool `json:"enabled"`
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// InsecureSkipVerify, if set to true, disables the client
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// certificate verification. It should only be set for
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// debugging or testing purposes.
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InsecureSkipVerify bool `json:"skip_verify"`
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}
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const (
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defaultExpiry time.Duration = 1 * time.Hour
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minExpiry time.Duration = 15 * time.Minute
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maxExpiry time.Duration = 365 * 24 * time.Hour
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)
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// GetExpiryDuration - return parsed expiry duration.
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func (l Config) GetExpiryDuration(dsecs string) (time.Duration, error) {
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if dsecs == "" {
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return defaultExpiry, nil
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}
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d, err := strconv.Atoi(dsecs)
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if err != nil {
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return 0, auth.ErrInvalidDuration
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}
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dur := time.Duration(d) * time.Second
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if dur < minExpiry || dur > maxExpiry {
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return 0, auth.ErrInvalidDuration
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}
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return dur, nil
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}
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// Lookup returns a new Config by merging the given K/V config
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// system with environment variables.
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func Lookup(kvs config.KVS) (Config, error) {
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if err := config.CheckValidKeys(config.IdentityTLSSubSys, kvs, DefaultKVS); err != nil {
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return Config{}, err
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}
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cfg := Config{}
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var err error
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v := env.Get(EnvIdentityTLSEnabled, "")
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if v == "" {
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return cfg, nil
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}
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cfg.Enabled, err = config.ParseBool(v)
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if err != nil {
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return Config{}, err
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}
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cfg.InsecureSkipVerify, err = config.ParseBool(env.Get(EnvIdentityTLSSkipVerify, kvs.Get(skipVerify)))
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if err != nil {
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return Config{}, err
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}
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return cfg, nil
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}
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const (
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skipVerify = "skip_verify"
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)
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// DefaultKVS is the the default K/V config system for
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// the STS TLS API.
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var DefaultKVS = config.KVS{
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config.KV{
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Key: skipVerify,
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Value: "off",
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},
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}
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// Help is the help and description for the STS API K/V configuration.
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var Help = config.HelpKVS{
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config.HelpKV{
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Key: skipVerify,
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Description: `trust client certificates without verification (default: 'off')`,
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Optional: true,
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Type: "on|off",
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},
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}
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