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[auth] Add Athenz authentication provider (#227)
* feat: add athenz authentication provider * style: fix style errors
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,179 @@ | ||
| // 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. | ||
|
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| package auth | ||
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| import ( | ||
| "crypto/tls" | ||
| "encoding/base64" | ||
| "errors" | ||
| "io/ioutil" | ||
| "regexp" | ||
| "strings" | ||
| "time" | ||
|
|
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| 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 | ||
| ) | ||
|
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| 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 | ||
| } | ||
|
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| type privateKeyURI struct { | ||
| Scheme string | ||
| MediaTypeAndEncodingType string | ||
| Data string | ||
| Path string | ||
| } | ||
|
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| 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 | ||
| } | ||
|
|
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| 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)) | ||
| } | ||
|
|
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| return &athenzAuthProvider{ | ||
| providerDomain: providerDomain, | ||
| tenantDomain: tenantDomain, | ||
| tenantService: tenantService, | ||
| privateKey: privateKey, | ||
| keyID: fixedKeyID, | ||
| principalHeader: principalHeader, | ||
| ztsURL: strings.TrimSuffix(ztsURL, "/"), | ||
| zmsNewTokenBuilder: zms.NewTokenBuilder, | ||
| ztsNewRoleToken: ztsNewRoleToken, | ||
| } | ||
| } | ||
|
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| func (p *athenzAuthProvider) Init() error { | ||
| uriSt := parseURI(p.privateKey) | ||
| var keyData []byte | ||
|
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| 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) | ||
| } | ||
|
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| tb, err := p.zmsNewTokenBuilder(p.tenantDomain, p.tenantService, keyData, p.keyID) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| p.tokenBuilder = tb | ||
|
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| 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 | ||
|
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| return nil | ||
| } | ||
|
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| func (p *athenzAuthProvider) Name() string { | ||
| return "athenz" | ||
| } | ||
|
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| func (p *athenzAuthProvider) GetTLSCertificate() (*tls.Certificate, error) { | ||
| return nil, nil | ||
| } | ||
|
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| func (p *athenzAuthProvider) GetData() ([]byte, error) { | ||
| tok, err := p.roleToken.RoleTokenValue() | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
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| return []byte(tok), nil | ||
| } | ||
|
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| func (p *athenzAuthProvider) Close() error { | ||
| return nil | ||
| } | ||
|
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| func parseURI(uri string) privateKeyURI { | ||
| var uriSt privateKeyURI | ||
| // scheme mediatype[;base64] path file | ||
| const expression = `^(?:([^:/?#]+):)(?:([;/\\\-\w]*),)?(?:/{0,2}((?:[^?#/]*/)*))?([^?#]*)` | ||
|
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| // 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] | ||
| } | ||
|
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| return uriSt | ||
| } |
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