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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,114 @@ | ||
| /* | ||
| Copyright 2016 The Kubernetes Authors. | ||
| Licensed 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 audit | ||
|
|
||
| import ( | ||
| "bufio" | ||
| "fmt" | ||
| "io" | ||
| "net" | ||
| "net/http" | ||
| "time" | ||
|
|
||
| "github.com/pborman/uuid" | ||
|
|
||
| "k8s.io/kubernetes/pkg/api" | ||
| utilnet "k8s.io/kubernetes/pkg/util/net" | ||
| ) | ||
|
|
||
| var _ http.ResponseWriter = &auditResponseWriter{} | ||
|
|
||
| type auditResponseWriter struct { | ||
| http.ResponseWriter | ||
| out io.Writer | ||
| id string | ||
| } | ||
|
|
||
| func (a *auditResponseWriter) WriteHeader(code int) { | ||
| fmt.Fprintf(a.out, "%s AUDIT: id=%q response=\"%d\"\n", time.Now().Format(time.RFC3339Nano), a.id, code) | ||
| a.ResponseWriter.WriteHeader(code) | ||
| } | ||
|
|
||
| // fancyResponseWriterDelegator implements http.CloseNotifier, http.Flusher and | ||
| // http.Hijacker which are needed to make certain http operation (eg. watch, rsh, etc) | ||
| // working. | ||
| type fancyResponseWriterDelegator struct { | ||
| *auditResponseWriter | ||
| } | ||
|
|
||
| func (f *fancyResponseWriterDelegator) CloseNotify() <-chan bool { | ||
| return f.ResponseWriter.(http.CloseNotifier).CloseNotify() | ||
| } | ||
|
|
||
| func (f *fancyResponseWriterDelegator) Flush() { | ||
| f.ResponseWriter.(http.Flusher).Flush() | ||
| } | ||
|
|
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| func (f *fancyResponseWriterDelegator) Hijack() (net.Conn, *bufio.ReadWriter, error) { | ||
| return f.ResponseWriter.(http.Hijacker).Hijack() | ||
| } | ||
|
|
||
| var _ http.CloseNotifier = &fancyResponseWriterDelegator{} | ||
| var _ http.Flusher = &fancyResponseWriterDelegator{} | ||
| var _ http.Hijacker = &fancyResponseWriterDelegator{} | ||
|
|
||
| // WithAudit decorates a http.Handler with audit logging information for all the | ||
| // requests coming to the server. Each audit log contains two entries: | ||
| // 1. the request line containing: | ||
| // - unique id allowing to match the response line (see 2) | ||
| // - source ip of the request | ||
| // - HTTP method being invoked | ||
| // - original user invoking the operation | ||
| // - impersonated user for the operation | ||
| // - namespace of the request or <none> | ||
| // - uri is the full URI as requested | ||
| // 2. the response line containing: | ||
| // - the unique id from 1 | ||
| // - response code | ||
| func WithAudit(handler http.Handler, requestContextMapper api.RequestContextMapper, out io.Writer) http.Handler { | ||
| return http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) { | ||
| ctx, _ := requestContextMapper.Get(req) | ||
| user, _ := api.UserFrom(ctx) | ||
| asuser := req.Header.Get("Impersonate-User") | ||
| if len(asuser) == 0 { | ||
| asuser = "<self>" | ||
| } | ||
| namespace := api.NamespaceValue(ctx) | ||
| if len(namespace) == 0 { | ||
| namespace = "<none>" | ||
| } | ||
| id := uuid.NewRandom().String() | ||
|
|
||
| fmt.Fprintf(out, "%s AUDIT: id=%q ip=%q method=%q user=%q as=%q namespace=%q uri=%q\n", | ||
| time.Now().Format(time.RFC3339Nano), id, utilnet.GetClientIP(req), req.Method, user.GetName(), asuser, namespace, req.URL) | ||
| respWriter := decorateResponseWriter(w, out, id) | ||
| handler.ServeHTTP(respWriter, req) | ||
| }) | ||
| } | ||
|
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| func decorateResponseWriter(responseWriter http.ResponseWriter, out io.Writer, id string) http.ResponseWriter { | ||
| delegate := &auditResponseWriter{ResponseWriter: responseWriter, out: out, id: id} | ||
| // check if the ResponseWriter we're wrapping is the fancy one we need | ||
| // or if the basic is sufficient | ||
| _, cn := responseWriter.(http.CloseNotifier) | ||
| _, fl := responseWriter.(http.Flusher) | ||
| _, hj := responseWriter.(http.Hijacker) | ||
| if cn && fl && hj { | ||
| return &fancyResponseWriterDelegator{delegate} | ||
| } | ||
| return delegate | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,58 @@ | ||
| /* | ||
| Copyright 2016 The Kubernetes Authors. | ||
| Licensed 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 audit | ||
|
|
||
| import ( | ||
| "bufio" | ||
| "io/ioutil" | ||
| "net" | ||
| "net/http" | ||
| "reflect" | ||
| "testing" | ||
| ) | ||
|
|
||
| type simpleResponseWriter struct { | ||
| http.ResponseWriter | ||
| } | ||
|
|
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| func (*simpleResponseWriter) WriteHeader(code int) {} | ||
|
|
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| type fancyResponseWriter struct { | ||
| simpleResponseWriter | ||
| } | ||
|
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| func (*fancyResponseWriter) CloseNotify() <-chan bool { return nil } | ||
|
|
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| func (*fancyResponseWriter) Flush() {} | ||
|
|
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| func (*fancyResponseWriter) Hijack() (net.Conn, *bufio.ReadWriter, error) { return nil, nil, nil } | ||
|
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| func TestConstructResponseWriter(t *testing.T) { | ||
| actual := decorateResponseWriter(&simpleResponseWriter{}, ioutil.Discard, "") | ||
| switch v := actual.(type) { | ||
| case *auditResponseWriter: | ||
| default: | ||
| t.Errorf("Expected auditResponseWriter, got %v", reflect.TypeOf(v)) | ||
| } | ||
|
|
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| actual = decorateResponseWriter(&fancyResponseWriter{}, ioutil.Discard, "") | ||
| switch v := actual.(type) { | ||
| case *fancyResponseWriterDelegator: | ||
| default: | ||
| t.Errorf("Expected fancyResponseWriterDelegator, got %v", reflect.TypeOf(v)) | ||
| } | ||
| } |
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