Golang log.Errorf函数代码示例

// NewBundler creates a new Bundler from the files passed in; these
// files should contain a list of valid root certificates and a list
// of valid intermediate certificates, respectively.
func NewBundler(caBundleFile, intBundleFile string) (*Bundler, error) {
	log.Debug("Loading CA bundle: ", caBundleFile)
	caBundle, err := ioutil.ReadFile(caBundleFile)
	if err != nil {
		log.Errorf("root bundle failed to load: %v", err)
		return nil, errors.Wrap(errors.RootError, errors.ReadFailed, err)
	}

	log.Debug("Loading Intermediate bundle: ", intBundleFile)
	intBundle, err := ioutil.ReadFile(intBundleFile)
	if err != nil {
		log.Errorf("intermediate bundle failed to load: %v", err)
		return nil, errors.Wrap(errors.IntermediatesError, errors.ReadFailed, err)
	}

	if _, err := os.Stat(IntermediateStash); err != nil && os.IsNotExist(err) {
		log.Infof("intermediate stash directory %s doesn't exist, creating", IntermediateStash)
		err = os.MkdirAll(IntermediateStash, 0755)
		if err != nil {
			log.Errorf("failed to create intermediate stash directory %s: %v",
				IntermediateStash, err)
			return nil, err
		}
		log.Infof("intermediate stash directory %s created", IntermediateStash)
	}
	return NewBundlerFromPEM(caBundle, intBundle)

}

// signWithCSR creates a new root certificate from signing a X509.CertificateRequest
// by a crypto.Signer.
func signWithCSR(tpl *x509.CertificateRequest, priv crypto.Signer, policy *config.Signing) (cert, csrPEM []byte, err error) {
	if policy == nil {
		policy = CAPolicy()
	}
	csrPEM, err = x509.CreateCertificateRequest(rand.Reader, tpl, priv)
	if err != nil {
		log.Errorf("failed to generate a CSR: %v", err)
		// The use of CertificateError was a matter of some
		// debate; it is the one edge case in which a new
		// error category specifically for CSRs might be
		// useful, but it was deemed that one edge case did
		// not a new category justify.
		err = cferr.Wrap(cferr.CertificateError, cferr.BadRequest, err)
		return
	}

	p := &pem.Block{
		Type:  "CERTIFICATE REQUEST",
		Bytes: csrPEM,
	}
	csrPEM = pem.EncodeToMemory(p)

	s, err := local.NewSigner(priv, nil, signer.DefaultSigAlgo(priv), nil)
	if err != nil {
		log.Errorf("failed to create signer: %v", err)
		return
	}
	s.SetPolicy(policy)

	signReq := signer.SignRequest{Request: string(csrPEM)}
	cert, err = s.Sign(signReq)
	return
}

// NewBundlerFromPEM creates a new Bundler from PEM-encoded root certificates and
// intermediate certificates.
func NewBundlerFromPEM(caBundlePEM, intBundlePEM []byte) (*Bundler, error) {
	b := &Bundler{
		RootPool:         x509.NewCertPool(),
		IntermediatePool: x509.NewCertPool(),
		KnownIssuers:     map[string]bool{},
	}

	log.Debug("parsing root certificates from PEM")
	roots, err := helpers.ParseCertificatesPEM(caBundlePEM)
	if err != nil {
		log.Errorf("failed to parse root bundle: %v", err)
		return nil, errors.New(errors.RootError, errors.ParseFailed)
	}

	log.Debug("parse intermediate certificates from PEM")
	var intermediates []*x509.Certificate
	if intermediates, err = helpers.ParseCertificatesPEM(intBundlePEM); err != nil {
		log.Errorf("failed to parse intermediate bundle: %v", err)
		return nil, errors.New(errors.IntermediatesError, errors.ParseFailed)
	}

	log.Debug("building certificate pools")
	for _, c := range roots {
		b.RootPool.AddCert(c)
		b.KnownIssuers[string(c.Signature)] = true
	}

	for _, c := range intermediates {
		b.IntermediatePool.AddCert(c)
		b.KnownIssuers[string(c.Signature)] = true
	}

	log.Debug("bundler set up")
	return b, nil
}

// makeBundle opens the file for writing, and listens for incoming
// certificates. These are PEM-encoded and written to file.
func makeBundle(filename string, bundler chan *x509.Certificate) {
	file, err := os.Create(filename)
	if err != nil {
		log.Errorf("%v", err)
		return
	}
	defer file.Close()

	var total int
	for {
		cert, ok := <-bundler
		if !ok {
			break
		}
		block := &pem.Block{
			Type:  "CERTIFICATE",
			Bytes: cert.Raw,
		}
		err = pem.Encode(file, block)
		if err != nil {
			log.Errorf("Failed to write PEM block: %v", err)
			break
		}
		total++
	}
	log.Infof("Wrote %d certificates.", total)
}

// NewSourceFromFile reads the named file into an InMemorySource.
// The file read by this function must contain whitespace-separated OCSP
// responses. Each OCSP response must be in base64-encoded DER form (i.e.,
// PEM without headers or whitespace).  Invalid responses are ignored.
// This function pulls the entire file into an InMemorySource.
func NewSourceFromFile(responseFile string) (Source, error) {
	fileContents, err := ioutil.ReadFile(responseFile)
	if err != nil {
		return nil, err
	}

	responsesB64 := regexp.MustCompile("\\s").Split(string(fileContents), -1)
	src := InMemorySource{}
	for _, b64 := range responsesB64 {
		// if the line/space is empty just skip
		if b64 == "" {
			continue
		}
		der, tmpErr := base64.StdEncoding.DecodeString(b64)
		if tmpErr != nil {
			log.Errorf("Base64 decode error on: %s", b64)
			continue
		}

		response, tmpErr := ocsp.ParseResponse(der, nil)
		if tmpErr != nil {
			log.Errorf("OCSP decode error on: %s", b64)
			continue
		}

		src[response.SerialNumber.String()] = der
	}

	log.Infof("Read %d OCSP responses", len(src))
	return src, nil
}

// LoadPlatforms reads the file content as a json object array and convert it
// to Platforms.
func LoadPlatforms(filename string) {
	// Attempt to load root certificate metadata
	log.Debug("Loading platform metadata: ", filename)
	bytes, err := ioutil.ReadFile(filename)
	if err != nil {
		log.Errorf("platform metadata failed to load: %v", err)
	}
	var rawPlatforms []Platform
	if bytes != nil {
		err = json.Unmarshal(bytes, &rawPlatforms)
		if err != nil {
			log.Errorf("platform metadata failed to parse: %v", err)
		}
	}

	for _, platform := range rawPlatforms {
		ok := platform.ParseAndLoad()
		if !ok {
			log.Errorf("fail to finalize the parsing of platform metadata:", err)
		} else {
			log.Infof("Platform metadata is loaded: %v %v", platform.Name, len(platform.KeyStore))
			Platforms = append(Platforms, platform)
		}
	}
}

// A Responder can process both GET and POST requests.  The mapping
// from an OCSP request to an OCSP response is done by the Source;
// the Responder simply decodes the request, and passes back whatever
// response is provided by the source.
func (rs Responder) ServeHTTP(response http.ResponseWriter, request *http.Request) {
	// Read response from request
	var requestBody []byte
	var err error
	switch request.Method {
	case "GET":
		re := regexp.MustCompile("^.*/")
		base64Request := re.ReplaceAllString(request.RequestURI, "")
		base64Request, err = url.QueryUnescape(base64Request)
		if err != nil {
			return
		}
		requestBody, err = base64.StdEncoding.DecodeString(base64Request)
		if err != nil {
			return
		}
	case "POST":
		requestBody, err = ioutil.ReadAll(request.Body)
		if err != nil {
			response.WriteHeader(http.StatusBadRequest)
			return
		}
	default:
		response.WriteHeader(http.StatusMethodNotAllowed)
		return
	}
	// TODO log request
	b64Body := base64.StdEncoding.EncodeToString(requestBody)
	log.Infof("Received OCSP request: %s", b64Body)

	// All responses after this point will be OCSP.
	// We could check for the content type of the request, but that
	// seems unnecessariliy restrictive.
	response.Header().Add("Content-Type", "application/ocsp-response")

	// Parse response as an OCSP request
	// XXX: This fails if the request contains the nonce extension.
	//      We don't intend to support nonces anyway, but maybe we
	//      should return unauthorizedRequest instead of malformed.
	ocspRequest, err := ocsp.ParseRequest(requestBody)
	if err != nil {
		log.Errorf("Error decoding request body: %s", b64Body)
		response.Write(malformedRequestErrorResponse)
		return
	}

	// Look up OCSP response from source
	ocspResponse, found := rs.Source.Response(ocspRequest)
	if !found {
		log.Errorf("No response found for request: %s", b64Body)
		response.Write(unauthorizedErrorResponse)
		return
	}

	// Write OCSP response to response
	response.WriteHeader(http.StatusOK)
	response.Write(ocspResponse)
}

// createAndWriteca.RootCA creates a Certificate authority for a new Swarm Cluster.
// We're copying CreateAndWriteca.RootCA, so we can have smaller key-sizes for tests
func createAndWriteRootCA(rootCN string, paths ca.CertPaths, expiry time.Duration) (ca.RootCA, error) {
	// Create a simple CSR for the CA using the default CA validator and policy
	req := cfcsr.CertificateRequest{
		CN:         rootCN,
		KeyRequest: cfcsr.NewBasicKeyRequest(),
		CA:         &cfcsr.CAConfig{Expiry: ca.RootCAExpiration},
	}

	// Generate the CA and get the certificate and private key
	cert, _, key, err := initca.New(&req)
	if err != nil {
		return ca.RootCA{}, err
	}

	// Convert the key given by initca to an object to create a ca.RootCA
	parsedKey, err := helpers.ParsePrivateKeyPEM(key)
	if err != nil {
		log.Errorf("failed to parse private key: %v", err)
		return ca.RootCA{}, err
	}

	// Convert the certificate into an object to create a ca.RootCA
	parsedCert, err := helpers.ParseCertificatePEM(cert)
	if err != nil {
		return ca.RootCA{}, err
	}

	// Create a Signer out of the private key
	signer, err := local.NewSigner(parsedKey, parsedCert, cfsigner.DefaultSigAlgo(parsedKey), ca.SigningPolicy(expiry))
	if err != nil {
		log.Errorf("failed to create signer: %v", err)
		return ca.RootCA{}, err
	}

	// Ensure directory exists
	err = os.MkdirAll(filepath.Dir(paths.Cert), 0755)
	if err != nil {
		return ca.RootCA{}, err
	}

	// Write the Private Key and Certificate to disk, using decent permissions
	if err := ioutils.AtomicWriteFile(paths.Cert, cert, 0644); err != nil {
		return ca.RootCA{}, err
	}
	if err := ioutils.AtomicWriteFile(paths.Key, key, 0600); err != nil {
		return ca.RootCA{}, err
	}

	// Create a Pool with our Root CA Certificate
	pool := x509.NewCertPool()
	if !pool.AppendCertsFromPEM(cert) {
		return ca.RootCA{}, fmt.Errorf("failed to append certificate to cert pool")
	}

	return ca.RootCA{Signer: signer, Key: key, Cert: cert, Pool: pool}, nil
}

// createAndWriteRootCA creates a Certificate authority for a new Swarm Cluster.
// We're copying ca.CreateRootCA, so we can have smaller key-sizes for tests
func createAndWriteRootCA(rootCN string, paths ca.CertPaths, expiry time.Duration) (ca.RootCA, error) {
	cert, key, err := CreateRootCertAndKey(rootCN)
	if err != nil {
		return ca.RootCA{}, err
	}

	// Convert the key given by initca to an object to create a ca.RootCA
	parsedKey, err := helpers.ParsePrivateKeyPEM(key)
	if err != nil {
		log.Errorf("failed to parse private key: %v", err)
		return ca.RootCA{}, err
	}

	// Convert the certificate into an object to create a ca.RootCA
	parsedCert, err := helpers.ParseCertificatePEM(cert)
	if err != nil {
		return ca.RootCA{}, err
	}

	// Create a Signer out of the private key
	signer, err := local.NewSigner(parsedKey, parsedCert, cfsigner.DefaultSigAlgo(parsedKey), ca.SigningPolicy(expiry))
	if err != nil {
		log.Errorf("failed to create signer: %v", err)
		return ca.RootCA{}, err
	}

	// Ensure directory exists
	err = os.MkdirAll(filepath.Dir(paths.Cert), 0755)
	if err != nil {
		return ca.RootCA{}, err
	}

	// Write the Private Key and Certificate to disk, using decent permissions
	if err := ioutils.AtomicWriteFile(paths.Cert, cert, 0644); err != nil {
		return ca.RootCA{}, err
	}
	if err := ioutils.AtomicWriteFile(paths.Key, key, 0600); err != nil {
		return ca.RootCA{}, err
	}

	// Create a Pool with our Root CA Certificate
	pool := x509.NewCertPool()
	if !pool.AppendCertsFromPEM(cert) {
		return ca.RootCA{}, errors.New("failed to append certificate to cert pool")
	}

	return ca.RootCA{
		Signer: signer,
		Key:    key,
		Cert:   cert,
		Pool:   pool,
		Digest: digest.FromBytes(cert),
	}, nil
}

// registerHandlers instantiates various handlers and assoicate them to corresponding endpoints.
func registerHandlers() error {
	log.Info("Setting up signer endpoint")
	signHandler, err := api.NewSignHandler(Config.caFile, Config.caKeyFile)
	if err != nil {
		log.Warningf("endpoint '/api/v1/cfssl/sign' is disabled: %v", err)
	} else {
		http.Handle("/api/v1/cfssl/sign", signHandler)
	}

	log.Info("Setting up bundler endpoint")
	bundleHandler, err := api.NewBundleHandler(Config.caBundleFile, Config.intBundleFile)
	if err != nil {
		log.Warningf("endpoint '/api/v1/cfssl/bundle' is disabled: %v", err)
	} else {
		http.Handle("/api/v1/cfssl/bundle", bundleHandler)
	}

	log.Info("Setting up CSR endpoint")
	generatorHandler, err := api.NewGeneratorHandler(api.CSRValidate)
	if err != nil {
		log.Errorf("Failed to set up CSR endpoint: %v", err)
		return err
	}
	http.Handle("/api/v1/cfssl/newkey", generatorHandler)

	log.Info("Setting up new cert endpoint")
	newCertGenerator, err := api.NewCertGeneratorHandler(api.CSRValidate,
		Config.caFile, Config.caKeyFile)
	if err != nil {
		log.Errorf("endpoint '/api/v1/cfssl/newcert' is disabled")
	} else {
		http.Handle("/api/v1/cfssl/newcert", newCertGenerator)
	}

	log.Info("Setting up initial CA endpoint")
	http.Handle("/api/v1/cfssl/init_ca", api.NewInitCAHandler())

	if Config.remote != "" {
		log.Info("Remote CFSSL endpoint given, setting up remote certificate generator")
		if rcg, err := api.NewRemoteCertGenerator(api.CSRValidate, Config.remote); err != nil {
			log.Errorf("Failed to set up remote certificate generator: %v", err)
			return err
		} else {
			http.Handle("/api/v1/cfssl/remotecert", rcg)
		}
	}

	log.Info("Handler set up complete.")
	return nil
}

// HandleError is the centralised error handling and reporting.
func HandleError(w http.ResponseWriter, err error) (code int) {
	if err == nil {
		return http.StatusOK
	}
	msg := err.Error()
	httpCode := http.StatusInternalServerError

	// If it is recognized as HttpError emitted from cfssl,
	// we rewrite the status code accordingly. If it is a
	// cfssl error, set the http status to StatusBadRequest
	switch err := err.(type) {
	case *errors.HTTPError:
		httpCode = err.StatusCode
		code = err.StatusCode
	case *errors.Error:
		httpCode = http.StatusBadRequest
		code = err.ErrorCode
		msg = err.Message
	}

	response := NewErrorResponse(msg, code)
	jsonMessage, err := json.Marshal(response)
	if err != nil {
		log.Errorf("Failed to marshal JSON: %v", err)
	} else {
		msg = string(jsonMessage)
	}
	http.Error(w, msg, httpCode)
	return code
}

// NewCertGeneratorHandler builds a new handler for generating
// certificates directly from certificate requests; the validator covers
// the certificate request and the CA's key and certificate are used to
// sign the generated request. If remote is not an empty string, the
// handler will send signature requests to the CFSSL instance contained
// in remote.
func NewCertGeneratorHandler(validator Validator, caFile, caKeyFile string, policy *config.Signing) (http.Handler, error) {
	var err error
	log.Info("setting up new generator / signer")
	cg := new(CertGeneratorHandler)

	if policy == nil {
		policy = &config.Signing{
			Default:  config.DefaultConfig(),
			Profiles: nil,
		}
	}

	root := universal.Root{
		Config: map[string]string{
			"ca-file":     caFile,
			"ca-key-file": caKeyFile,
		},
	}
	if cg.signer, err = universal.NewSigner(root, policy); err != nil {
		log.Errorf("setting up signer failed: %v", err)
		return nil, err
	}

	cg.generator = &csr.Generator{Validator: validator}

	return api.HTTPHandler{Handler: cg, Methods: []string{"POST"}}, nil
}

// NewFromSigner creates a new root certificate from a crypto.Signer.
func NewFromSigner(req *csr.CertificateRequest, priv crypto.Signer) (cert, csrPEM []byte, err error) {
	policy := CAPolicy()
	if req.CA != nil {
		if req.CA.Expiry != "" {
			policy.Default.ExpiryString = req.CA.Expiry
			policy.Default.Expiry, err = time.ParseDuration(req.CA.Expiry)
			if err != nil {
				return nil, nil, err
			}
		}

		signer.MaxPathLen = req.CA.PathLength
		if req.CA.PathLength != 0 && req.CA.PathLenZero == true {
			log.Infof("ignore invalid 'pathlenzero' value")
		} else {
			signer.MaxPathLenZero = req.CA.PathLenZero
		}
	}

	csrPEM, err = csr.Generate(priv, req)
	if err != nil {
		return nil, nil, err
	}

	s, err := local.NewSigner(priv, nil, signer.DefaultSigAlgo(priv), nil)
	if err != nil {
		log.Errorf("failed to create signer: %v", err)
		return
	}
	s.SetPolicy(policy)

	signReq := signer.SignRequest{Request: string(csrPEM)}
	cert, err = s.Sign(signReq)
	return
}

// Generate creates a new CSR from a CertificateRequest structure and
// an existing key. The KeyRequest field is ignored.
func Generate(priv crypto.Signer, req *CertificateRequest) (csr []byte, err error) {
	sigAlgo := helpers.SignerAlgo(priv, crypto.SHA256)
	if sigAlgo == x509.UnknownSignatureAlgorithm {
		return nil, cferr.New(cferr.PrivateKeyError, cferr.Unavailable)
	}

	var tpl = x509.CertificateRequest{
		Subject:            req.Name(),
		SignatureAlgorithm: sigAlgo,
	}

	for i := range req.Hosts {
		if ip := net.ParseIP(req.Hosts[i]); ip != nil {
			tpl.IPAddresses = append(tpl.IPAddresses, ip)
		} else {
			tpl.DNSNames = append(tpl.DNSNames, req.Hosts[i])
		}
	}

	csr, err = x509.CreateCertificateRequest(rand.Reader, &tpl, priv)
	if err != nil {
		log.Errorf("failed to generate a CSR: %v", err)
		err = cferr.Wrap(cferr.CSRError, cferr.BadRequest, err)
		return
	}
	block := pem.Block{
		Type:  "CERTIFICATE REQUEST",
		Bytes: csr,
	}

	log.Info("encoded CSR")
	csr = pem.EncodeToMemory(&block)
	return
}

// New creates a new root certificate from the certificate request.
func New(req *csr.CertificateRequest) (cert, csrPEM, key []byte, err error) {
	policy := CAPolicy()
	if req.CA != nil {
		if req.CA.Expiry != "" {
			policy.Default.ExpiryString = req.CA.Expiry
			policy.Default.Expiry, err = time.ParseDuration(req.CA.Expiry)
			if err != nil {
				return
			}
		}

		policy.Default.CAConstraint.MaxPathLen = req.CA.PathLength
		if req.CA.PathLength != 0 && req.CA.PathLenZero == true {
			log.Infof("ignore invalid 'pathlenzero' value")
		} else {
			policy.Default.CAConstraint.MaxPathLenZero = req.CA.PathLenZero
		}
	}

	g := &csr.Generator{Validator: validator}
	csrPEM, key, err = g.ProcessRequest(req)
	if err != nil {
		log.Errorf("failed to process request: %v", err)
		key = nil
		return
	}

	priv, err := helpers.ParsePrivateKeyPEM(key)
	if err != nil {
		log.Errorf("failed to parse private key: %v", err)
		return
	}

	s, err := local.NewSigner(priv, nil, signer.DefaultSigAlgo(priv), policy)
	if err != nil {
		log.Errorf("failed to create signer: %v", err)
		return
	}

	signReq := signer.SignRequest{Hosts: req.Hosts, Request: string(csrPEM)}
	cert, err = s.Sign(signReq)

	return

}