How to use altNames method of x509 Package

Best K6 code snippet using x509.altNames

pki_helpers.go

Source:pki_helpers.go

...307	if err != nil {308		return nil, errors.Wrapf(err, "unable to get first IP address from the given CIDR: %v", cfg.Networking.ServiceSubnet)309	}310	// create AltNames with defaults DNSNames/IPs311	altNames := &certutil.AltNames{312		DNSNames: []string{313			cfg.NodeRegistration.Name,314			"kubernetes",315			"kubernetes.default",316			"kubernetes.default.svc",317			fmt.Sprintf("kubernetes.default.svc.%s", cfg.Networking.DNSDomain),318		},319		IPs: []net.IP{320			internalAPIServerVirtualIP,321			advertiseAddress,322		},323	}324	// add cluster controlPlaneEndpoint if present (dns or ip)325	if len(cfg.ControlPlaneEndpoint) > 0 {326		if host, _, err := kubeadmutil.ParseHostPort(cfg.ControlPlaneEndpoint); err == nil {327			if ip := net.ParseIP(host); ip != nil {328				altNames.IPs = append(altNames.IPs, ip)329			} else {330				altNames.DNSNames = append(altNames.DNSNames, host)331			}332		} else {333			return nil, errors.Wrapf(err, "error parsing cluster controlPlaneEndpoint %q", cfg.ControlPlaneEndpoint)334		}335	}336	appendSANsToAltNames(altNames, cfg.APIServer.CertSANs, kubeadmconstants.APIServerCertName)337	return altNames, nil338}339// GetEtcdAltNames builds an AltNames object for generating the etcd server certificate.340// `advertise address` and localhost are included in the SAN since this is the interfaces the etcd static pod listens on.341// The user can override the listen address with `Etcd.ExtraArgs` and add SANs with `Etcd.ServerCertSANs`.342func GetEtcdAltNames(cfg *kubeadmapi.InitConfiguration) (*certutil.AltNames, error) {343	return getAltNames(cfg, kubeadmconstants.EtcdServerCertName)344}345// GetEtcdPeerAltNames builds an AltNames object for generating the etcd peer certificate.346// Hostname and `API.AdvertiseAddress` are included if the user chooses to promote the single node etcd cluster into a multi-node one (stacked etcd).347// The user can override the listen address with `Etcd.ExtraArgs` and add SANs with `Etcd.PeerCertSANs`.348func GetEtcdPeerAltNames(cfg *kubeadmapi.InitConfiguration) (*certutil.AltNames, error) {349	return getAltNames(cfg, kubeadmconstants.EtcdPeerCertName)350}351// getAltNames builds an AltNames object with the cfg and certName.352func getAltNames(cfg *kubeadmapi.InitConfiguration, certName string) (*certutil.AltNames, error) {353	// advertise address354	advertiseAddress := net.ParseIP(cfg.LocalAPIEndpoint.AdvertiseAddress)355	if advertiseAddress == nil {356		return nil, errors.Errorf("error parsing LocalAPIEndpoint AdvertiseAddress %v: is not a valid textual representation of an IP address",357			cfg.LocalAPIEndpoint.AdvertiseAddress)358	}359	// create AltNames with defaults DNSNames/IPs360	altNames := &certutil.AltNames{361		DNSNames: []string{cfg.NodeRegistration.Name, "localhost"},362		IPs:      []net.IP{advertiseAddress, net.IPv4(127, 0, 0, 1), net.IPv6loopback},363	}364	if cfg.Etcd.Local != nil {365		if certName == kubeadmconstants.EtcdServerCertName {366			appendSANsToAltNames(altNames, cfg.Etcd.Local.ServerCertSANs, kubeadmconstants.EtcdServerCertName)367		} else if certName == kubeadmconstants.EtcdPeerCertName {368			appendSANsToAltNames(altNames, cfg.Etcd.Local.PeerCertSANs, kubeadmconstants.EtcdPeerCertName)369		}370	}371	return altNames, nil372}373// appendSANsToAltNames parses SANs from as list of strings and adds them to altNames for use on a specific cert374// altNames is passed in with a pointer, and the struct is modified375// valid IP address strings are parsed and added to altNames.IPs as net.IP's376// RFC-1123 compliant DNS strings are added to altNames.DNSNames as strings377// RFC-1123 compliant wildcard DNS strings are added to altNames.DNSNames as strings378// certNames is used to print user facing warningsÂ and should be the name of the cert the altNames will be used for379func appendSANsToAltNames(altNames *certutil.AltNames, SANs []string, certName string) {380	for _, altname := range SANs {381		if ip := net.ParseIP(altname); ip != nil {382			altNames.IPs = append(altNames.IPs, ip)383		} else if len(validation.IsDNS1123Subdomain(altname)) == 0 {384			altNames.DNSNames = append(altNames.DNSNames, altname)385		} else if len(validation.IsWildcardDNS1123Subdomain(altname)) == 0 {386			altNames.DNSNames = append(altNames.DNSNames, altname)387		} else {388			fmt.Printf(389				"[certificates] WARNING: '%s' was not added to the '%s' SAN, because it is not a valid IP or RFC-1123 compliant DNS entry\n",390				altname,391				certName,392			)393		}394	}395}396// EncodeCSRPEM returns PEM-encoded CSR data397func EncodeCSRPEM(csr *x509.CertificateRequest) []byte {398	block := pem.Block{399		Type:  certutil.CertificateRequestBlockType,400		Bytes: csr.Raw,401	}402	return pem.EncodeToMemory(&block)403}404func parseCSRPEM(pemCSR []byte) (*x509.CertificateRequest, error) {405	block, _ := pem.Decode(pemCSR)406	if block == nil {407		return nil, errors.New("data doesn't contain a valid certificate request")408	}409	if block.Type != certutil.CertificateRequestBlockType {410		return nil, errors.Errorf("expected block type %q, but PEM had type %q", certutil.CertificateRequestBlockType, block.Type)411	}412	return x509.ParseCertificateRequest(block.Bytes)413}414// CertificateRequestFromFile returns the CertificateRequest from a given PEM-encoded file.415// Returns an error if the file could not be read or if the CSR could not be parsed.416func CertificateRequestFromFile(file string) (*x509.CertificateRequest, error) {417	pemBlock, err := ioutil.ReadFile(file)418	if err != nil {419		return nil, errors.Wrap(err, "failed to read file")420	}421	csr, err := parseCSRPEM(pemBlock)422	if err != nil {423		return nil, errors.Wrapf(err, "error reading certificate request file %s", file)424	}425	return csr, nil426}427// NewCSR creates a new CSR428func NewCSR(cfg CertConfig, key crypto.Signer) (*x509.CertificateRequest, error) {429	template := &x509.CertificateRequest{430		Subject: pkix.Name{431			CommonName:   cfg.CommonName,432			Organization: cfg.Organization,433		},434		DNSNames:    cfg.AltNames.DNSNames,435		IPAddresses: cfg.AltNames.IPs,436	}437	csrBytes, err := x509.CreateCertificateRequest(cryptorand.Reader, template, key)438	if err != nil {439		return nil, errors.Wrap(err, "failed to create a CSR")440	}441	return x509.ParseCertificateRequest(csrBytes)442}443// EncodeCertPEM returns PEM-endcoded certificate data444func EncodeCertPEM(cert *x509.Certificate) []byte {445	block := pem.Block{446		Type:  CertificateBlockType,447		Bytes: cert.Raw,448	}449	return pem.EncodeToMemory(&block)450}451// EncodePublicKeyPEM returns PEM-encoded public data452func EncodePublicKeyPEM(key crypto.PublicKey) ([]byte, error) {453	der, err := x509.MarshalPKIXPublicKey(key)454	if err != nil {455		return []byte{}, err456	}457	block := pem.Block{458		Type:  PublicKeyBlockType,459		Bytes: der,460	}461	return pem.EncodeToMemory(&block), nil462}463// NewPrivateKey creates an RSA private key464func NewPrivateKey(keyType x509.PublicKeyAlgorithm) (crypto.Signer, error) {465	if keyType == x509.ECDSA {466		return ecdsa.GenerateKey(elliptic.P256(), cryptorand.Reader)467	}468	return rsa.GenerateKey(cryptorand.Reader, rsaKeySize)469}470// NewSignedCert creates a signed certificate using the given CA certificate and key471func NewSignedCert(cfg *CertConfig, key crypto.Signer, caCert *x509.Certificate, caKey crypto.Signer) (*x509.Certificate, error) {472	serial, err := cryptorand.Int(cryptorand.Reader, new(big.Int).SetInt64(math.MaxInt64))473	if err != nil {474		return nil, err475	}476	if len(cfg.CommonName) == 0 {477		return nil, errors.New("must specify a CommonName")478	}479	if len(cfg.Usages) == 0 {480		return nil, errors.New("must specify at least one ExtKeyUsage")481	}482	RemoveDuplicateAltNames(&cfg.AltNames)483	certTmpl := x509.Certificate{484		Subject: pkix.Name{485			CommonName:   cfg.CommonName,486			Organization: cfg.Organization,487		},488		DNSNames:     cfg.AltNames.DNSNames,489		IPAddresses:  cfg.AltNames.IPs,490		SerialNumber: serial,491		NotBefore:    caCert.NotBefore,492		NotAfter:     time.Now().Add(kubeadmconstants.CertificateValidity).UTC(),493		KeyUsage:     x509.KeyUsageKeyEncipherment | x509.KeyUsageDigitalSignature,494		ExtKeyUsage:  cfg.Usages,495	}496	certDERBytes, err := x509.CreateCertificate(cryptorand.Reader, &certTmpl, caCert, key.Public(), caKey)497	if err != nil {498		return nil, err499	}500	return x509.ParseCertificate(certDERBytes)501}502// RemoveDuplicateAltNames removes duplicate items in altNames.503func RemoveDuplicateAltNames(altNames *certutil.AltNames) {504	if altNames == nil {505		return506	}507	if altNames.DNSNames != nil {508		altNames.DNSNames = sets.NewString(altNames.DNSNames...).List()509	}510	ipsKeys := make(map[string]struct{})511	var ips []net.IP512	for _, one := range altNames.IPs {513		if _, ok := ipsKeys[one.String()]; !ok {514			ipsKeys[one.String()] = struct{}{}515			ips = append(ips, one)516		}517	}518	altNames.IPs = ips519}...

manager_test.go

Source:manager_test.go

1/*2Copyright 2019 The Kubernetes Authors.3Licensed under the Apache License, Version 2.0 (the "License");4you may not use this file except in compliance with the License.5You may obtain a copy of the License at6    http://www.apache.org/licenses/LICENSE-2.07Unless required by applicable law or agreed to in writing, software8distributed under the License is distributed on an "AS IS" BASIS,9WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.10See the License for the specific language governing permissions and11limitations under the License.12*/13package renewal14import (15	"crypto/x509"16	"crypto/x509/pkix"17	"fmt"18	"net"19	"os"20	"path/filepath"21	"testing"22	"time"23	certutil "k8s.io/client-go/util/cert"24	kubeadmapi "k8s.io/kubernetes/cmd/kubeadm/app/apis/kubeadm"25	certtestutil "k8s.io/kubernetes/cmd/kubeadm/app/util/certs"26	"k8s.io/kubernetes/cmd/kubeadm/app/util/pkiutil"27	testutil "k8s.io/kubernetes/cmd/kubeadm/test"28)29var (30	testCACertCfg = &pkiutil.CertConfig{31		Config: certutil.Config{CommonName: "kubernetes"},32	}33	testCACert, testCAKey, _ = pkiutil.NewCertificateAuthority(testCACertCfg)34	testCertCfg = &pkiutil.CertConfig{35		Config: certutil.Config{36			CommonName:   "test-common-name",37			Organization: []string{"sig-cluster-lifecycle"},38			AltNames: certutil.AltNames{39				IPs:      []net.IP{net.ParseIP("10.100.0.1")},40				DNSNames: []string{"test-domain.space"},41			},42			Usages: []x509.ExtKeyUsage{x509.ExtKeyUsageClientAuth},43		},44	}45)46func TestNewManager(t *testing.T) {47	tests := []struct {48		name                 string49		cfg                  *kubeadmapi.ClusterConfiguration50		expectedCertificates int51	}{52		{53			name:                 "cluster with local etcd",54			cfg:                  &kubeadmapi.ClusterConfiguration{},55			expectedCertificates: 10, //[admin apiserver apiserver-etcd-client apiserver-kubelet-client controller-manager etcd/healthcheck-client etcd/peer etcd/server front-proxy-client scheduler]56		},57		{58			name: "cluster with external etcd",59			cfg: &kubeadmapi.ClusterConfiguration{60				Etcd: kubeadmapi.Etcd{61					External: &kubeadmapi.ExternalEtcd{},62				},63			},64			expectedCertificates: 6, // [admin apiserver apiserver-kubelet-client controller-manager front-proxy-client scheduler]65		},66	}67	for _, test := range tests {68		t.Run(test.name, func(t *testing.T) {69			rm, err := NewManager(test.cfg, "")70			if err != nil {71				t.Fatalf("Failed to create the certificate renewal manager: %v", err)72			}73			if len(rm.Certificates()) != test.expectedCertificates {74				t.Errorf("Expected %d certificates, saw %d", test.expectedCertificates, len(rm.Certificates()))75			}76		})77	}78}79func TestRenewUsingLocalCA(t *testing.T) {80	dir := testutil.SetupTempDir(t)81	defer os.RemoveAll(dir)82	if err := pkiutil.WriteCertAndKey(dir, "ca", testCACert, testCAKey); err != nil {83		t.Fatalf("couldn't write out CA certificate to %s", dir)84	}85	cfg := &kubeadmapi.ClusterConfiguration{86		CertificatesDir: dir,87	}88	rm, err := NewManager(cfg, dir)89	if err != nil {90		t.Fatalf("Failed to create the certificate renewal manager: %v", err)91	}92	tests := []struct {93		name           string94		certName       string95		createCertFunc func() *x509.Certificate96	}{97		{98			name:     "Certificate renewal for a PKI certificate",99			certName: "apiserver",100			createCertFunc: func() *x509.Certificate {101				return writeTestCertificate(t, dir, "apiserver", testCACert, testCAKey)102			},103		},104		{105			name:     "Certificate renewal for a certificate embedded in a kubeconfig file",106			certName: "admin.conf",107			createCertFunc: func() *x509.Certificate {108				return writeTestKubeconfig(t, dir, "admin.conf", testCACert, testCAKey)109			},110		},111	}112	for _, test := range tests {113		t.Run(test.name, func(t *testing.T) {114			cert := test.createCertFunc()115			time.Sleep(1 * time.Second)116			_, err := rm.RenewUsingLocalCA(test.certName)117			if err != nil {118				t.Fatalf("error renewing certificate: %v", err)119			}120			newCert, err := rm.certificates[test.certName].readwriter.Read()121			if err != nil {122				t.Fatalf("error reading renewed certificate: %v", err)123			}124			if newCert.SerialNumber.Cmp(cert.SerialNumber) == 0 {125				t.Fatal("expected new certificate, but renewed certificate has same serial number")126			}127			if !newCert.NotAfter.After(cert.NotAfter) {128				t.Fatalf("expected new certificate with updated expiration, but renewed certificate has same NotAfter value: saw %s, expected greather than %s", newCert.NotAfter, cert.NotAfter)129			}130			certtestutil.AssertCertificateIsSignedByCa(t, newCert, testCACert)131			certtestutil.AssertCertificateHasClientAuthUsage(t, newCert)132			certtestutil.AssertCertificateHasOrganizations(t, newCert, testCertCfg.Organization...)133			certtestutil.AssertCertificateHasCommonName(t, newCert, testCertCfg.CommonName)134			certtestutil.AssertCertificateHasDNSNames(t, newCert, testCertCfg.AltNames.DNSNames...)135			certtestutil.AssertCertificateHasIPAddresses(t, newCert, testCertCfg.AltNames.IPs...)136		})137	}138}139func TestCreateRenewCSR(t *testing.T) {140	dir := testutil.SetupTempDir(t)141	defer os.RemoveAll(dir)142	outdir := filepath.Join(dir, "out")143	if err := os.MkdirAll(outdir, 0755); err != nil {144		t.Fatalf("couldn't create %s", outdir)145	}146	if err := pkiutil.WriteCertAndKey(dir, "ca", testCACert, testCAKey); err != nil {147		t.Fatalf("couldn't write out CA certificate to %s", dir)148	}149	cfg := &kubeadmapi.ClusterConfiguration{150		CertificatesDir: dir,151	}152	rm, err := NewManager(cfg, dir)153	if err != nil {154		t.Fatalf("Failed to create the certificate renewal manager: %v", err)155	}156	tests := []struct {157		name           string158		certName       string159		createCertFunc func() *x509.Certificate160	}{161		{162			name:     "Creation of a CSR request for renewal of a PKI certificate",163			certName: "apiserver",164			createCertFunc: func() *x509.Certificate {165				return writeTestCertificate(t, dir, "apiserver", testCACert, testCAKey)166			},167		},168		{169			name:     "Creation of a CSR request for renewal of a certificate embedded in a kubeconfig file",170			certName: "admin.conf",171			createCertFunc: func() *x509.Certificate {172				return writeTestKubeconfig(t, dir, "admin.conf", testCACert, testCAKey)173			},174		},175	}176	for _, test := range tests {177		t.Run(test.name, func(t *testing.T) {178			test.createCertFunc()179			time.Sleep(1 * time.Second)180			err := rm.CreateRenewCSR(test.certName, outdir)181			if err != nil {182				t.Fatalf("error renewing certificate: %v", err)183			}184			file := fmt.Sprintf("%s.key", test.certName)185			if _, err := os.Stat(filepath.Join(outdir, file)); os.IsNotExist(err) {186				t.Errorf("Expected file %s does not exist", file)187			}188			file = fmt.Sprintf("%s.csr", test.certName)189			if _, err := os.Stat(filepath.Join(outdir, file)); os.IsNotExist(err) {190				t.Errorf("Expected file %s does not exist", file)191			}192		})193	}194}195func TestCertToConfig(t *testing.T) {196	expectedConfig := &certutil.Config{197		CommonName:   "test-common-name",198		Organization: []string{"sig-cluster-lifecycle"},199		AltNames: certutil.AltNames{200			IPs:      []net.IP{net.ParseIP("10.100.0.1")},201			DNSNames: []string{"test-domain.space"},202		},203		Usages: []x509.ExtKeyUsage{x509.ExtKeyUsageClientAuth},204	}205	cert := &x509.Certificate{206		Subject: pkix.Name{207			CommonName:   "test-common-name",208			Organization: []string{"sig-cluster-lifecycle"},209		},210		ExtKeyUsage: []x509.ExtKeyUsage{x509.ExtKeyUsageClientAuth},211		DNSNames:    []string{"test-domain.space"},212		IPAddresses: []net.IP{net.ParseIP("10.100.0.1")},213	}214	cfg := certToConfig(cert)215	if cfg.CommonName != expectedConfig.CommonName {216		t.Errorf("expected common name %q, got %q", expectedConfig.CommonName, cfg.CommonName)217	}218	if len(cfg.Organization) != 1 || cfg.Organization[0] != expectedConfig.Organization[0] {219		t.Errorf("expected organization %v, got %v", expectedConfig.Organization, cfg.Organization)220	}221	if len(cfg.Usages) != 1 || cfg.Usages[0] != expectedConfig.Usages[0] {222		t.Errorf("expected ext key usage %v, got %v", expectedConfig.Usages, cfg.Usages)223	}224	if len(cfg.AltNames.IPs) != 1 || cfg.AltNames.IPs[0].String() != expectedConfig.AltNames.IPs[0].String() {225		t.Errorf("expected SAN IPs %v, got %v", expectedConfig.AltNames.IPs, cfg.AltNames.IPs)226	}227	if len(cfg.AltNames.DNSNames) != 1 || cfg.AltNames.DNSNames[0] != expectedConfig.AltNames.DNSNames[0] {228		t.Errorf("expected SAN DNSNames %v, got %v", expectedConfig.AltNames.DNSNames, cfg.AltNames.DNSNames)229	}230}...

tls_util.go

Source:tls_util.go

...42	IPs      []net.IP43}44// NewAltNames parses given addrs into either ip or dns name, and returns Altnames for them.45func NewAltNames(addrs []string) AltNames {46	var altNames AltNames47	for _, addr := range addrs {48		if ip := net.ParseIP(addr); ip != nil {49			altNames.IPs = append(altNames.IPs, ip)50		} else {51			altNames.DNSNames = append(altNames.DNSNames, addr)52		}53	}54	return altNames55}56// NewPrivateKey returns randomly generated RSA private key.57func NewPrivateKey() (*rsa.PrivateKey, error) {58	return rsa.GenerateKey(rand.Reader, rsaKeySize)59}60// EncodePublicKeyPEM encodes the given public key pem and returns bytes (base64).61func EncodePublicKeyPEM(key *rsa.PublicKey) ([]byte, error) {62	der, err := x509.MarshalPKIXPublicKey(key)63	if err != nil {64		return []byte{}, err65	}66	block := pem.Block{67		Type:  "PUBLIC KEY",68		Bytes: der,...

altNames

Using AI Code Generation

1import (2func main() {3    cert, err := ioutil.ReadFile("cert.pem")4    if err != nil {5        fmt.Println("Error reading file")6    }7    block, _ := pem.Decode(cert)8    if block == nil {9        fmt.Println("Error decoding cert")10    }11    x509cert, err := x509.ParseCertificate(block.Bytes)12    if err != nil {13        fmt.Println("Error parsing cert")14    }15    fmt.Println(x509cert.DNSNames)16}

altNames

Using AI Code Generation

1import (2func main() {3    cert, err := ioutil.ReadFile("cert.pem")4    if err != nil {5        fmt.Println("Error reading file:", err)6    }7    block, _ := pem.Decode(cert)8    if block == nil {9        fmt.Println("Error decoding PEM file")10    }11    x509cert, err := x509.ParseCertificate(block.Bytes)12    if err != nil {13        fmt.Println("Error parsing X509 cert:", err)14    }15    fmt.Println(x509cert.DNSNames)16}17import (18func main() {19    cert, err := ioutil.ReadFile("cert.pem")20    if err != nil {21        fmt.Println("Error reading file:", err)22    }23    block, _ := pem.Decode(cert)24    if block == nil {25        fmt.Println("Error decoding PEM file")26    }27    x509cert, err := x509.ParseCertificate(block.Bytes)28    if err != nil {29        fmt.Println("Error parsing X509 cert:", err)30    }31    var SAN struct {32    }33    _, err = asn1.Unmarshal(x509cert.Extensions[0].Value, &SAN)34    if err != nil {35        fmt.Println("Error parsing subject alternate name:", err)36    }37    fmt.Println(SAN.Names)38}39import (40func main() {41    cert, err := ioutil.ReadFile("cert.pem")42    if err != nil {43        fmt.Println("Error reading file:", err)44    }45    block, _ := pem.Decode(cert)46    if block == nil {47        fmt.Println("Error decoding PEM file")48    }49    x509cert, err := x509.ParseCertificate(block.Bytes)50    if err != nil {

altNames

Using AI Code Generation

1CertificateFactory cf = CertificateFactory.getInstance("X.509");2InputStream caInput = new BufferedInputStream(new FileInputStream("ca.crt"));3Certificate ca;4try {5    ca = cf.generateCertificate(caInput);6    System.out.println("ca=" + ((X509Certificate) ca).getSubjectDN());7} finally {8    caInput.close();9}10CertificateFactory cf = CertificateFactory.getInstance("X.509");11InputStream caInput = new BufferedInputStream(new FileInputStream("ca.crt"));12Certificate ca;13try {14    ca = cf.generateCertificate(caInput);15    System.out.println("ca=" + ((X509Certificate) ca).getSubjectDN());16} finally {17    caInput.close();18}19CertificateFactory cf = CertificateFactory.getInstance("X.509");20InputStream caInput = new BufferedInputStream(new FileInputStream("ca.crt"));21Certificate ca;22try {23    ca = cf.generateCertificate(caInput);24    System.out.println("ca=" + ((X509Certificate) ca).getSubjectDN());25} finally {26    caInput.close();27}28CertificateFactory cf = CertificateFactory.getInstance("X.509");29InputStream caInput = new BufferedInputStream(new FileInputStream("ca.crt"));30Certificate ca;31try {32    ca = cf.generateCertificate(caInput);33    System.out.println("ca=" + ((X509Certificate) ca).getSubjectDN());34} finally {35    caInput.close();36}37CertificateFactory cf = CertificateFactory.getInstance("X.509");38InputStream caInput = new BufferedInputStream(new FileInputStream("ca.crt"));39Certificate ca;40try {41    ca = cf.generateCertificate(caInput);42    System.out.println("ca=" + ((X509Certificate) ca).getSubjectDN());43} finally {44    caInput.close();45}46CertificateFactory cf = CertificateFactory.getInstance("X.509");47InputStream caInput = new BufferedInputStream(new FileInputStream("ca.crt"));48Certificate ca;49try {50    ca = cf.generateCertificate(caInput);51    System.out.println("ca=" + ((X509Certificate) ca).getSubjectDN());52} finally {53    caInput.close();54}

altNames

Using AI Code Generation

1import (2func main() {3    cert, err := x509.ParseCertificate(certFile)4    if err != nil {5        fmt.Println("Error parsing certificate:", err)6        os.Exit(1)7    }8    fmt.Println(cert.DNSNames)9}

altNames

Using AI Code Generation

1import (2func main() {3    certPEMBlock, err := ioutil.ReadFile("/etc/ssl/certs/ssl-cert-snakeoil.pem")4    if err != nil {5        fmt.Println("Error reading file")6    }7    certDERBlock, _ := pem.Decode(certPEMBlock)8    cert, err := x509.ParseCertificate(certDERBlock.Bytes)9    if err != nil {10        fmt.Println("Error parsing certificate")11    }12    fmt.Println(cert.DNSNames)13}14import (15func main() {16    certPEMBlock, err := ioutil.ReadFile("/etc/ssl/certs/ssl-cert-snakeoil.pem")17    if err != nil {18        fmt.Println("Error reading file")19    }20    certDERBlock, _ := pem.Decode(certPEMBlock)21    cert, err := x509.ParseCertificate(certDERBlock.Bytes)22    if err != nil {23        fmt.Println("Error parsing certificate")24    }25    fmt.Println(cert.Subject.CommonName)26}27import (28func main() {29    certPEMBlock, err := ioutil.ReadFile("/etc/ssl/certs/ssl-cert-snakeoil.pem")30    if err != nil {31        fmt.Println("Error reading file")32    }33    certDERBlock, _ := pem.Decode(certPEMBlock)34    cert, err := x509.ParseCertificate(certDERBlock.Bytes)35    if err != nil {36        fmt.Println("Error parsing certificate")37    }38    fmt.Println(cert.Subject.CommonName)39}40import (41func main() {42    certPEMBlock, err := ioutil.ReadFile("/etc/ssl/certs/ssl-cert-snakeoil.pem")43    if err != nil {44        fmt.Println("Error reading file")45    }

altNames

Using AI Code Generation

1import (2func main() {3	certPool := x509.NewCertPool()4	cert, err := ioutil.ReadFile("cert.pem")5	if err != nil {6		log.Fatal(err)7	}8	certPool.AppendCertsFromPEM(cert)9	client := &http.Client{10		Transport: &http.Transport{11			TLSClientConfig: &tls.Config{12			},13		},14	}15	if err != nil {16		log.Fatal(err)17	}18	defer resp.Body.Close()19	body, err := ioutil.ReadAll(resp.Body)20	if err != nil {21		log.Fatal(err)22	}23	fmt.Println(string(body))24}25import (26func main() {27	certPool := x509.NewCertPool()28	cert, err := ioutil.ReadFile("cert.pem")29	if err != nil {30		log.Fatal(err)31	}32	certPool.AppendCertsFromPEM(cert)33	client := &http.Client{34		Transport: &http.Transport{35			TLSClientConfig: &tls.Config{36			},37		},38	}39	if err != nil {40		log.Fatal(err)41	}42	defer resp.Body.Close()43	body, err := ioutil.ReadAll(resp.Body)44	if err != nil {45		log.Fatal(err)46	}47	fmt.Println(string(body))48}49import (50func main() {

altNames

Using AI Code Generation

1import "crypto/x509"2import "fmt"3import "encoding/pem"4import "os"5func main() {6    certPEMBlock, err := os.ReadFile(certFile)7    if err != nil {8        panic(err)9    }10    certDERBlock, _ := pem.Decode(certPEMBlock)11    if certDERBlock == nil {12        panic("failed to parse certificate PEM")13    }14    cert, err := x509.ParseCertificate(certDERBlock.Bytes)15    if err != nil {16        panic(err)17    }18    fmt.Println(cert.DNSNames)19    fmt.Println(cert.IPAddresses)20    fmt.Println(cert.EmailAddresses)21}

Automation Testing Tutorials

Learn to execute automation testing from scratch with LambdaTest Learning Hub. Right from setting up the prerequisites to run your first automation test, to following best practices and diving deeper into advanced test scenarios. LambdaTest Learning Hubs compile a list of step-by-step guides to help you be proficient with different test automation frameworks i.e. Selenium, Cypress, TestNG etc.