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console: Add protocol authentication
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,78 @@ | ||
| // Copyright © 2023 The Things Network Foundation, The Things Industries B.V. | ||
| // | ||
| // 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 middleware | ||
|
|
||
| import ( | ||
| "fmt" | ||
| "net/http" | ||
| "net/textproto" | ||
| "strings" | ||
|
|
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| "go.thethings.network/lorawan-stack/v3/pkg/auth" | ||
| ) | ||
|
|
||
| var ( | ||
| protocolHeader = textproto.CanonicalMIMEHeaderKey("Sec-WebSocket-Protocol") | ||
| authorizationHeader = textproto.CanonicalMIMEHeaderKey("Authorization") | ||
| connectionHeader = textproto.CanonicalMIMEHeaderKey("Connection") | ||
| upgradeHeader = textproto.CanonicalMIMEHeaderKey("Upgrade") | ||
| ) | ||
|
|
||
| func isWebSocketRequest(r *http.Request) bool { | ||
| h := r.Header | ||
| return strings.EqualFold(h.Get(connectionHeader), "upgrade") && | ||
| strings.EqualFold(h.Get(upgradeHeader), "websocket") | ||
| } | ||
|
|
||
| // ProtocolAuthentication returns a middleware that authenticates WebSocket requests using the subprotocol. | ||
| // The subprotocol must be prefixed with the given prefix. | ||
| // The token is extracted from the subprotocol and used to authenticate the request. | ||
| // If the token is valid, the subprotocol is removed from the request. | ||
| // If the token is invalid, the request is not authenticated. | ||
| func ProtocolAuthentication(prefix string) func(http.Handler) http.Handler { | ||
| prefixLen := len(prefix) | ||
| return func(next http.Handler) http.Handler { | ||
| return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) { | ||
| if !isWebSocketRequest(r) { | ||
| next.ServeHTTP(w, r) | ||
| return | ||
| } | ||
| if r.Header.Get(authorizationHeader) != "" { | ||
| next.ServeHTTP(w, r) | ||
| return | ||
| } | ||
| protocols := strings.Split(strings.TrimSpace(r.Header.Get(protocolHeader)), ",") | ||
| newProtocols := make([]string, 0, len(protocols)) | ||
| token := "" | ||
| for _, protocol := range protocols { | ||
| p := strings.TrimSpace(protocol) | ||
| if len(p) >= prefixLen && strings.EqualFold(prefix, p[:prefixLen]) { | ||
| token = p[prefixLen:] | ||
| continue | ||
| } | ||
| newProtocols = append(newProtocols, p) | ||
| } | ||
| if _, _, _, err := auth.SplitToken(token); err == nil { | ||
| if len(newProtocols) > 0 { | ||
| r.Header.Set(protocolHeader, strings.Join(newProtocols, ",")) | ||
| } else { | ||
| r.Header.Del(protocolHeader) | ||
| } | ||
| r.Header.Set(authorizationHeader, fmt.Sprintf("Bearer %s", token)) | ||
| } | ||
| next.ServeHTTP(w, r) | ||
| }) | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,16 @@ | ||
| // Copyright © 2023 The Things Network Foundation, The Things Industries B.V. | ||
| // | ||
| // 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 middleware implements the events middleware. | ||
| package middleware |
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