mirror of
https://github.com/gogrlx/nats-server.git
synced 2026-04-02 03:38:42 -07:00
84 lines
2.1 KiB
Go
84 lines
2.1 KiB
Go
// Copyright 2023 The NATS 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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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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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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package certidp
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import (
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"encoding/base64"
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"fmt"
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"io"
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"net/http"
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"strings"
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"time"
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"golang.org/x/crypto/ocsp"
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)
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func FetchOCSPResponse(link *ChainLink, opts *OCSPPeerConfig, log *Log) ([]byte, error) {
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if link == nil || link.Leaf == nil || link.Issuer == nil || opts == nil || log == nil {
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return nil, fmt.Errorf(ErrInvalidChainlink)
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}
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timeout := time.Duration(opts.Timeout * float64(time.Second))
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if timeout <= 0*time.Second {
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timeout = DefaultOCSPResponderTimeout
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}
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getRequestBytes := func(u string, hc *http.Client) ([]byte, error) {
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resp, err := hc.Get(u)
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if err != nil {
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return nil, err
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}
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defer resp.Body.Close()
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if resp.StatusCode != http.StatusOK {
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return nil, fmt.Errorf(ErrBadResponderHTTPStatus, resp.StatusCode)
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}
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return io.ReadAll(resp.Body)
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}
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// Request documentation:
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// https://tools.ietf.org/html/rfc6960#appendix-A.1
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reqDER, err := ocsp.CreateRequest(link.Leaf, link.Issuer, nil)
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if err != nil {
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return nil, err
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}
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reqEnc := base64.StdEncoding.EncodeToString(reqDER)
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responders := *link.OCSPWebEndpoints
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if len(responders) == 0 {
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return nil, fmt.Errorf(ErrNoAvailOCSPServers)
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}
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var raw []byte
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hc := &http.Client{
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Timeout: timeout,
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}
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for _, u := range responders {
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url := u.String()
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log.Debugf(DbgMakingCARequest, url)
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url = strings.TrimSuffix(url, "/")
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raw, err = getRequestBytes(fmt.Sprintf("%s/%s", url, reqEnc), hc)
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if err == nil {
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break
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}
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}
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if err != nil {
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return nil, fmt.Errorf(ErrFailedWithAllRequests, err)
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}
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return raw, nil
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}
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