| // Licensed to the Apache Software Foundation (ASF) under one |
| // or more contributor license agreements. See the NOTICE file |
| // distributed with this work for additional information |
| // regarding copyright ownership. The ASF licenses this file |
| // to you under the Apache License, Version 2.0 (the |
| // "License"); you may not use this file except in compliance |
| // with the License. You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, |
| // software distributed under the License is distributed on an |
| // "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| // KIND, either express or implied. See the License for the |
| // specific language governing permissions and limitations |
| // under the License. |
| |
| package auth |
| |
| import ( |
| "crypto/tls" |
| "encoding/base64" |
| "errors" |
| "io/ioutil" |
| "regexp" |
| "strings" |
| "time" |
| |
| zms "github.com/yahoo/athenz/libs/go/zmssvctoken" |
| zts "github.com/yahoo/athenz/libs/go/ztsroletoken" |
| ) |
| |
| const ( |
| minExpire = 2 * time.Hour |
| maxExpire = 24 * time.Hour |
| ) |
| |
| type athenzAuthProvider struct { |
| providerDomain string |
| tenantDomain string |
| tenantService string |
| privateKey string |
| keyID string |
| principalHeader string |
| ztsURL string |
| tokenBuilder zms.TokenBuilder |
| roleToken zts.RoleToken |
| zmsNewTokenBuilder func(domain, name string, privateKeyPEM []byte, keyVersion string) (zms.TokenBuilder, error) |
| ztsNewRoleToken func(tok zms.Token, domain string, opts zts.RoleTokenOptions) zts.RoleToken |
| } |
| |
| type privateKeyURI struct { |
| Scheme string |
| MediaTypeAndEncodingType string |
| Data string |
| Path string |
| } |
| |
| func NewAuthenticationAthenzWithParams(params map[string]string) (Provider, error) { |
| return NewAuthenticationAthenz( |
| params["providerDomain"], |
| params["tenantDomain"], |
| params["tenantService"], |
| params["privateKey"], |
| params["keyId"], |
| params["principalHeader"], |
| params["ztsUrl"], |
| ), nil |
| } |
| |
| func NewAuthenticationAthenz( |
| providerDomain string, |
| tenantDomain string, |
| tenantService string, |
| privateKey string, |
| keyID string, |
| principalHeader string, |
| ztsURL string) Provider { |
| var fixedKeyID string |
| if keyID == "" { |
| fixedKeyID = "0" |
| } else { |
| fixedKeyID = keyID |
| } |
| ztsNewRoleToken := func(tok zms.Token, domain string, opts zts.RoleTokenOptions) zts.RoleToken { |
| return zts.RoleToken(zts.NewRoleToken(tok, domain, opts)) |
| } |
| |
| return &athenzAuthProvider{ |
| providerDomain: providerDomain, |
| tenantDomain: tenantDomain, |
| tenantService: tenantService, |
| privateKey: privateKey, |
| keyID: fixedKeyID, |
| principalHeader: principalHeader, |
| ztsURL: strings.TrimSuffix(ztsURL, "/"), |
| zmsNewTokenBuilder: zms.NewTokenBuilder, |
| ztsNewRoleToken: ztsNewRoleToken, |
| } |
| } |
| |
| func (p *athenzAuthProvider) Init() error { |
| uriSt := parseURI(p.privateKey) |
| var keyData []byte |
| |
| if uriSt.Scheme == "data" { |
| if uriSt.MediaTypeAndEncodingType != "application/x-pem-file;base64" { |
| return errors.New("Unsupported mediaType or encodingType: " + uriSt.MediaTypeAndEncodingType) |
| } |
| key, err := base64.StdEncoding.DecodeString(uriSt.Data) |
| if err != nil { |
| return err |
| } |
| keyData = key |
| } else if uriSt.Scheme == "file" { |
| key, err := ioutil.ReadFile(uriSt.Path) |
| if err != nil { |
| return err |
| } |
| keyData = key |
| } else { |
| return errors.New("Unsupported URI Scheme: " + uriSt.Scheme) |
| } |
| |
| tb, err := p.zmsNewTokenBuilder(p.tenantDomain, p.tenantService, keyData, p.keyID) |
| if err != nil { |
| return err |
| } |
| p.tokenBuilder = tb |
| |
| roleToken := p.ztsNewRoleToken(p.tokenBuilder.Token(), p.providerDomain, zts.RoleTokenOptions{ |
| BaseZTSURL: p.ztsURL + "/zts/v1", |
| MinExpire: minExpire, |
| MaxExpire: maxExpire, |
| AuthHeader: p.principalHeader, |
| }) |
| p.roleToken = roleToken |
| |
| return nil |
| } |
| |
| func (p *athenzAuthProvider) Name() string { |
| return "athenz" |
| } |
| |
| func (p *athenzAuthProvider) GetTLSCertificate() (*tls.Certificate, error) { |
| return nil, nil |
| } |
| |
| func (p *athenzAuthProvider) GetData() ([]byte, error) { |
| tok, err := p.roleToken.RoleTokenValue() |
| if err != nil { |
| return nil, err |
| } |
| |
| return []byte(tok), nil |
| } |
| |
| func (p *athenzAuthProvider) Close() error { |
| return nil |
| } |
| |
| func parseURI(uri string) privateKeyURI { |
| var uriSt privateKeyURI |
| // scheme mediatype[;base64] path file |
| const expression = `^(?:([^:/?#]+):)(?:([;/\\\-\w]*),)?(?:/{0,2}((?:[^?#/]*/)*))?([^?#]*)` |
| |
| // when expression cannot be parsed, then panics |
| re := regexp.MustCompile(expression) |
| if re.MatchString(uri) { |
| groups := re.FindStringSubmatch(uri) |
| uriSt.Scheme = groups[1] |
| uriSt.MediaTypeAndEncodingType = groups[2] |
| uriSt.Data = groups[4] |
| uriSt.Path = groups[3] + groups[4] |
| } |
| |
| return uriSt |
| } |