mirror of
https://github.com/k3s-io/k3s.git
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106 lines
3.9 KiB
Go
106 lines
3.9 KiB
Go
/*
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Copyright 2017 The Kubernetes Authors.
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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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http://www.apache.org/licenses/LICENSE-2.0
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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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package flag
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import (
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"crypto/tls"
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"fmt"
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"k8s.io/apimachinery/pkg/util/sets"
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)
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// ciphers maps strings into tls package cipher constants in
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// https://golang.org/pkg/crypto/tls/#pkg-constants
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var ciphers = map[string]uint16{
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"TLS_RSA_WITH_RC4_128_SHA": tls.TLS_RSA_WITH_RC4_128_SHA,
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"TLS_RSA_WITH_3DES_EDE_CBC_SHA": tls.TLS_RSA_WITH_3DES_EDE_CBC_SHA,
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"TLS_RSA_WITH_AES_128_CBC_SHA": tls.TLS_RSA_WITH_AES_128_CBC_SHA,
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"TLS_RSA_WITH_AES_256_CBC_SHA": tls.TLS_RSA_WITH_AES_256_CBC_SHA,
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"TLS_RSA_WITH_AES_128_CBC_SHA256": tls.TLS_RSA_WITH_AES_128_CBC_SHA256,
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"TLS_RSA_WITH_AES_128_GCM_SHA256": tls.TLS_RSA_WITH_AES_128_GCM_SHA256,
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"TLS_RSA_WITH_AES_256_GCM_SHA384": tls.TLS_RSA_WITH_AES_256_GCM_SHA384,
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"TLS_ECDHE_ECDSA_WITH_RC4_128_SHA": tls.TLS_ECDHE_ECDSA_WITH_RC4_128_SHA,
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"TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA": tls.TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA,
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"TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA": tls.TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA,
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"TLS_ECDHE_RSA_WITH_RC4_128_SHA": tls.TLS_ECDHE_RSA_WITH_RC4_128_SHA,
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"TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA": tls.TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA,
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"TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA": tls.TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA,
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"TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA": tls.TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA,
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"TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256": tls.TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256,
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"TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256": tls.TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256,
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"TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256": tls.TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,
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"TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256": tls.TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,
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"TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384": tls.TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,
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"TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384": tls.TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,
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"TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305": tls.TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,
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"TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305": tls.TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,
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}
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func TLSCipherPossibleValues() []string {
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cipherKeys := sets.NewString()
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for key := range ciphers {
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cipherKeys.Insert(key)
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}
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return cipherKeys.List()
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}
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func TLSCipherSuites(cipherNames []string) ([]uint16, error) {
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if len(cipherNames) == 0 {
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return nil, nil
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}
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ciphersIntSlice := make([]uint16, 0)
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for _, cipher := range cipherNames {
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intValue, ok := ciphers[cipher]
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if !ok {
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return nil, fmt.Errorf("Cipher suite %s not supported or doesn't exist", cipher)
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}
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ciphersIntSlice = append(ciphersIntSlice, intValue)
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}
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return ciphersIntSlice, nil
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}
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var versions = map[string]uint16{
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"VersionTLS10": tls.VersionTLS10,
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"VersionTLS11": tls.VersionTLS11,
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"VersionTLS12": tls.VersionTLS12,
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}
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func TLSPossibleVersions() []string {
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versionsKeys := sets.NewString()
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for key := range versions {
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versionsKeys.Insert(key)
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}
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return versionsKeys.List()
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}
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func TLSVersion(versionName string) (uint16, error) {
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if len(versionName) == 0 {
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return DefaultTLSVersion(), nil
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}
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if version, ok := versions[versionName]; ok {
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return version, nil
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}
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return 0, fmt.Errorf("unknown tls version %q", versionName)
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}
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func DefaultTLSVersion() uint16 {
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// Can't use SSLv3 because of POODLE and BEAST
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// Can't use TLSv1.0 because of POODLE and BEAST using CBC cipher
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// Can't use TLSv1.1 because of RC4 cipher usage
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return tls.VersionTLS12
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}
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