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add OCSP status worker #336
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,167 @@ | ||
| package ocspStatus | ||
|
|
||
| import ( | ||
| "bytes" | ||
| "crypto" | ||
| "crypto/x509" | ||
| "encoding/base64" | ||
| "encoding/json" | ||
| "fmt" | ||
| "io/ioutil" | ||
| "net/http" | ||
| "time" | ||
|
|
||
| "github.com/mozilla/tls-observatory/logger" | ||
| "github.com/mozilla/tls-observatory/worker" | ||
| "golang.org/x/crypto/ocsp" | ||
| ) | ||
|
|
||
| var ( | ||
| workerName = "ocspStatus" | ||
| workerDesc = "Determines a certificate's status via OCSP'" | ||
|
|
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| httpClient = &http.Client{ | ||
| Transport: &http.Transport{ | ||
| TLSHandshakeTimeout: 30 * time.Second, | ||
| }, | ||
| Timeout: 60 * time.Second, | ||
| } | ||
|
|
||
| log = logger.GetLogger() | ||
| ) | ||
|
|
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| func init() { | ||
| runner := new(ocspStatus) | ||
|
|
||
| worker.RegisterPrinter(workerName, worker.Info{Runner: runner, Description: workerDesc}) | ||
| worker.RegisterWorker(workerName, worker.Info{Runner: runner, Description: workerDesc}) | ||
| } | ||
|
|
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| type Result struct { | ||
| Status int `json:"status"` | ||
| RevokedAt time.Time `json:"revoked_at,omitempty"` | ||
| } | ||
|
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| type ocspStatus struct{} | ||
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| func (w ocspStatus) Run(in worker.Input, resChan chan worker.Result) { | ||
| res := worker.Result{ | ||
| WorkerName: workerName, | ||
| Success: false, | ||
| } | ||
|
|
||
| x509Cert, err := in.Certificate.ToX509() | ||
| if err != nil { | ||
| resChan <- worker.Result{ | ||
| Success: false, | ||
| WorkerName: workerName, | ||
| Errors: []string{fmt.Sprintf("%s for certificate %d", err.Error(), in.Certificate.ID)}, | ||
| Result: nil, | ||
| } | ||
| return | ||
| } | ||
|
|
||
| issuerEncoded := in.CertificateChain.Certs[len(in.CertificateChain.Certs)-1] // last cert in chain | ||
| x509IssuerCertEncoded, err := base64.StdEncoding.DecodeString(issuerEncoded) | ||
| if err != nil { | ||
| resChan <- worker.Result{ | ||
| Success: false, | ||
| WorkerName: workerName, | ||
| Errors: []string{fmt.Sprintf("%s decoding issuer for certificate %d", err.Error(), in.Certificate.ID)}, | ||
| Result: nil, | ||
| } | ||
| return | ||
| } | ||
| x509Issuer, err := x509.ParseCertificate(x509IssuerCertEncoded) | ||
| if err != nil { | ||
| resChan <- worker.Result{ | ||
| Success: false, | ||
| WorkerName: workerName, | ||
| Errors: []string{fmt.Sprintf("%s parsing issuer for certificate %d", err.Error(), in.Certificate.ID)}, | ||
| Result: nil, | ||
| } | ||
| return | ||
| } | ||
|
|
||
| // grab OCSP response | ||
| opts := &ocsp.RequestOptions{ | ||
| Hash: crypto.SHA256, | ||
| } | ||
| req, err := ocsp.CreateRequest(x509Cert, x509Issuer, opts) | ||
| if err != nil { | ||
| resChan <- worker.Result{ | ||
| Success: false, | ||
| WorkerName: workerName, | ||
| Errors: []string{fmt.Sprintf("%s creating OCSP response for certificate %d", err.Error(), in.Certificate.ID)}, | ||
| Result: nil, | ||
| } | ||
| return | ||
| } | ||
| httpResponse, err := http.Post(x509Cert.OCSPServer[0], "application/ocsp-request", bytes.NewReader(req)) | ||
| if err != nil { | ||
| resChan <- worker.Result{ | ||
| Success: false, | ||
| WorkerName: workerName, | ||
| Errors: []string{fmt.Sprintf("%s making OCSP response for certificate %d", err.Error(), in.Certificate.ID)}, | ||
| Result: nil, | ||
| } | ||
| return | ||
| } | ||
|
|
||
| // parse response | ||
| output, err := ioutil.ReadAll(httpResponse.Body) | ||
| if err != nil { | ||
| resChan <- worker.Result{ | ||
| Success: false, | ||
| WorkerName: workerName, | ||
| Errors: []string{fmt.Sprintf("%s reading OCSP response for certificate %d", err.Error(), in.Certificate.ID)}, | ||
| Result: nil, | ||
| } | ||
| return | ||
| } | ||
| resp, err := ocsp.ParseResponse(output, x509Issuer) | ||
| if err != nil { | ||
| resChan <- worker.Result{ | ||
| Success: false, | ||
| WorkerName: workerName, | ||
| Errors: []string{fmt.Sprintf("%s parsing OCSP response for certificate %d", err.Error(), in.Certificate.ID)}, | ||
| Result: nil, | ||
| } | ||
| return | ||
| } | ||
|
|
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| status := Result{ | ||
| Status: resp.Status, | ||
| } | ||
| if resp.Status == ocsp.Revoked { | ||
| status.RevokedAt = resp.RevokedAt | ||
| } | ||
|
|
||
| out, err := json.Marshal(status) | ||
| if err != nil { | ||
| res.Success = false | ||
| res.Errors = append(res.Errors, err.Error()) | ||
| } else { | ||
| res.Success = true | ||
| res.Result = out | ||
| } | ||
| resChan <- res | ||
| } | ||
|
|
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| func (ocspStatus) AnalysisPrinter(input []byte, printAll interface{}) (results []string, err error) { | ||
| var result Result | ||
| if err = json.Unmarshal(input, &result); err != nil { | ||
| return nil, fmt.Errorf("ocspStatus Worker: failed to parse results: err=%v", err) | ||
| } | ||
|
|
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| results = []string{"* OCSP Status: "} | ||
| switch result.Status { | ||
| case ocsp.Good: | ||
| results = append(results, fmt.Sprintf(" - Not revoked")) | ||
| case ocsp.Revoked: | ||
| results = append(results, fmt.Sprintf(" - Revoked at %s\n", result.RevokedAt.Format(time.RFC3339))) | ||
| default: | ||
| results = append(results, fmt.Sprintf(" - Unknown status code %d\n", result.Status)) | ||
| } | ||
|
Contributor
There was a problem hiding this comment. Lets put everything on a single line like we did for the CAA and CRL workers. The output should be |
||
| return results, nil | ||
| } | ||
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The
revoked_atfield is still stored here, but it looks to be detected by.IsZero(), which doesn't really make sense as a revocation time anyway.The status field is always checked in the printer anyway.