chore: update linter. (#1278)

.golangci.toml

@@ -38,7 +38,10 @@
     "nestif", # too many false-positive
     "goerr113", # not relevant
     "noctx",
-    "nlreturn",
+    "nlreturn", # not relevant
+    "wrapcheck",
+    "tparallel", # not relevant
+    "exhaustivestruct", # too many false-positive
   ]
 
 [issues]
@@ -63,13 +66,13 @@
     text = "string `(bar|foo)` has (\\d+) occurrences, make it a constant"
   [[issues.exclude-rules]]
     path = "certcrypto/crypto.go"
-    text = "`(tlsFeatureExtensionOID|ocspMustStapleFeature)` is a global variable"
+    text = "(tlsFeatureExtensionOID|ocspMustStapleFeature) is a global variable"
   [[issues.exclude-rules]]
     path = "challenge/dns01/nameserver.go"
-    text = "`(defaultNameservers|recursiveNameservers|dnsTimeout|fqdnSoaCache|muFqdnSoaCache)` is a global variable"
+    text = "(defaultNameservers|recursiveNameservers|dnsTimeout|fqdnSoaCache|muFqdnSoaCache) is a global variable"
   [[issues.exclude-rules]]
     path = "challenge/dns01/nameserver_test.go"
-    text = "`findXByFqdnTestCases` is a global variable"
+    text = "findXByFqdnTestCases is a global variable"
   [[issues.exclude-rules]]
     path = "challenge/http01/domain_matcher.go"
     text = "string `Host` has \\d occurrences, make it a constant"
@@ -81,28 +84,25 @@
     text = "Function 'parseForwardedHeader' has too many statements"
   [[issues.exclude-rules]]
     path = "challenge/tlsalpn01/tls_alpn_challenge.go"
-    text = "`idPeAcmeIdentifierV1` is a global variable"
+    text = "idPeAcmeIdentifierV1 is a global variable"
   [[issues.exclude-rules]]
     path = "log/logger.go"
-    text = "`Logger` is a global variable"
+    text = "Logger is a global variable"
-  [[issues.exclude-rules]]
-    path = "cmd/lego/main.go"
-    text = "`version` is a global variable"
   [[issues.exclude-rules]]
     path = "e2e/(dnschallenge/)?[\\d\\w]+_test.go"
-    text = "`load` is a global variable"
+    text = "load is a global variable"
   [[issues.exclude-rules]]
     path = "providers/dns/([\\d\\w]+/)*[\\d\\w]+_test.go"
-    text = "`envTest` is a global variable"
+    text = "envTest is a global variable"
   [[issues.exclude-rules]]
     path = "providers/dns/namecheap/namecheap_test.go"
-    text = "`testCases` is a global variable"
+    text = "testCases is a global variable"
   [[issues.exclude-rules]]
     path = "providers/dns/acmedns/acmedns_test.go"
-    text = "`(errorClientErr|errorStorageErr|egTestAccount)` is a global variable"
+    text = "egTestAccount is a global variable"
   [[issues.exclude-rules]]
     path = "providers/http/memcached/memcached_test.go"
-    text = "`memcachedHosts` is a global variable"
+    text = "memcachedHosts is a global variable"
   [[issues.exclude-rules]]
     path = "providers/dns/sakuracloud/client_test.go"
     text = "cyclomatic complexity 13 of func `(TestDNSProvider_cleanupTXTRecord_concurrent|TestDNSProvider_addTXTRecord_concurrent)` is high"

README.md

@@ -8,6 +8,7 @@ Let's Encrypt client and ACME library written in Go.
 
 ## Features
 
+- ACME v2 [RFC 8555](https://tools.ietf.org/html/rfc8555) 
 - Register with CA
 - Obtain certificates, both from scratch or with an existing CSR
 - Renew certificates

acme/api/account.go

@@ -38,6 +38,7 @@ func (a *AccountService) NewEAB(accMsg acme.Account, kid, hmacEncoded string) (a
 	if err != nil {
 		return acme.ExtendedAccount{}, fmt.Errorf("acme: error signing eab content: %w", err)
 	}
+
 	accMsg.ExternalAccountBinding = eabJWS
 
 	return a.New(accMsg)

acme/api/api.go

@@ -90,14 +90,14 @@ func (a *Core) retrievablePost(uri string, content []byte, response interface{})
 		var err error
 		resp, err = a.signedPost(uri, content, response)
 		if err != nil {
-			switch err.(type) {
 			// Retry if the nonce was invalidated
-			case *acme.NonceError:
+			var e *acme.NonceError
-				return err
+			if errors.As(err, &e) {
-			default:
-				cancel()
 				return err
 			}
+
+			cancel()
+			return err
 		}
 
 		return nil
@@ -109,7 +109,7 @@ func (a *Core) retrievablePost(uri string, content []byte, response interface{})
 
 	err := backoff.RetryNotify(operation, backoff.WithContext(bo, ctx), notify)
 	if err != nil {
-		return nil, err
+		return resp, err
 	}
 
 	return resp, nil

challenge/tlsalpn01/tls_alpn_challenge_server.go

@@ -2,6 +2,7 @@ package tlsalpn01
 
 import (
 	"crypto/tls"
+	"errors"
 	"fmt"
 	"net"
 	"net/http"
@@ -87,7 +88,7 @@ func (s *ProviderServer) CleanUp(domain, token, keyAuth string) error {
 	}
 
 	// Server was created, close it.
-	if err := s.listener.Close(); err != nil && err != http.ErrServerClosed {
+	if err := s.listener.Close(); err != nil && errors.Is(err, http.ErrServerClosed) {
 		return err
 	}
 

cmd/hook.go

@@ -29,7 +29,7 @@ func launchHook(hook string, meta map[string]string) error {
 		fmt.Println(string(output))
 	}
 
-	if ctxCmd.Err() == context.DeadlineExceeded {
+	if errors.Is(ctxCmd.Err(), context.DeadlineExceeded) {
 		return errors.New("hook timed out")
 	}
 

providers/dns/acmedns/acmedns.go

@@ -109,10 +109,10 @@ func (d *DNSProvider) Present(domain, _, keyAuth string) error {
 	// Check if credentials were previously saved for this domain.
 	account, err := d.storage.Fetch(domain)
 	// Errors other than goacmeDNS.ErrDomainNotFound are unexpected.
-	if err != nil && err != goacmedns.ErrDomainNotFound {
+	if err != nil && !errors.Is(err, goacmedns.ErrDomainNotFound) {
 		return err
 	}
-	if err == goacmedns.ErrDomainNotFound {
+	if errors.Is(err, goacmedns.ErrDomainNotFound) {
 		// The account did not exist. Create a new one and return an error
 		// indicating the required one-time manual CNAME setup.
 		return d.register(domain, fqdn)

providers/dns/azure/azure.go

@@ -182,8 +182,8 @@ func (d *DNSProvider) Present(domain, token, keyAuth string) error {
 	// Get existing record set
 	rset, err := rsc.Get(ctx, d.config.ResourceGroup, zone, relative, dns.TXT)
 	if err != nil {
-		detailedError, ok := err.(autorest.DetailedError)
+		var detailed *autorest.DetailedError
-		if !ok || detailedError.StatusCode != http.StatusNotFound {
+		if !errors.As(err, detailed) || detailed.StatusCode != http.StatusNotFound {
 			return fmt.Errorf("azure: %w", err)
 		}
 	}
@@ -276,7 +276,7 @@ func getAuthorizer(config *Config) (autorest.Authorizer, error) {
 
 		spToken, err := credentialsConfig.ServicePrincipalToken()
 		if err != nil {
-			return nil, fmt.Errorf("failed to get oauth token from client credentials: %v", err)
+			return nil, fmt.Errorf("failed to get oauth token from client credentials: %w", err)
 		}
 
 		spToken.SetSender(config.HTTPClient)

providers/dns/cloudflare/cloudflare.go

@@ -77,6 +77,7 @@ func NewDNSProvider() (*DNSProvider, error) {
 			[]string{"CLOUDFLARE_ZONE_API_TOKEN", "CF_ZONE_API_TOKEN", "CLOUDFLARE_DNS_API_TOKEN", "CF_DNS_API_TOKEN"},
 		)
 		if errT != nil {
+			// nolint:errorlint
 			return nil, fmt.Errorf("cloudflare: %v or %v", err, errT)
 		}
 	}

providers/dns/edgedns/edgedns.go

@@ -223,6 +223,6 @@ func isNotFound(err error) bool {
 		return false
 	}
 
-	e, ok := err.(configdns.ConfigDNSError)
+	var e configdns.ConfigDNSError
-	return ok && e.NotFound()
+	return errors.As(err, &e) && e.NotFound()
 }

providers/dns/gcloud/googlecloud.go

@@ -241,11 +241,10 @@ func (d *DNSProvider) applyChanges(zone string, change *dns.Change) error {
 
 	chg, err := d.client.Changes.Create(d.config.Project, zone, change).Do()
 	if err != nil {
-		if v, ok := err.(*googleapi.Error); ok {
+		var v *googleapi.Error
-			if v.Code == http.StatusNotFound {
+		if errors.As(err, &v) && v.Code == http.StatusNotFound {
 			return nil
 		}
-		}
 
 		data, _ := json.Marshal(change)
 		return fmt.Errorf("failed to perform changes [zone %s, change %s]: %w", zone, string(data), err)

providers/dns/inwx/inwx.go

@@ -126,15 +126,15 @@ func (d *DNSProvider) Present(domain, token, keyAuth string) error {
 
 	_, err = d.client.Nameservers.CreateRecord(request)
 	if err != nil {
-		switch er := err.(type) {
+		var er *goinwx.ErrorResponse
-		case *goinwx.ErrorResponse:
+		if errors.As(err, &er) {
 			if er.Message == "Object exists" {
 				return nil
 			}
 			return fmt.Errorf("inwx: %w", err)
-		default:
-			return fmt.Errorf("inwx: %w", err)
 		}
+
+		return fmt.Errorf("inwx: %w", err)
 	}
 
 	return nil

providers/dns/joker/provider_dmapi.go

@@ -26,6 +26,7 @@ func newDmapiProvider() (*dmapiProvider, error) {
 		var errU error
 		values, errU = env.Get(EnvUsername, EnvPassword)
 		if errU != nil {
+			// nolint:errorlint
 			return nil, fmt.Errorf("joker: %v or %v", errU, err)
 		}
 	}

providers/dns/joker/provider_svc.go

@@ -21,7 +21,7 @@ type svcProvider struct {
 func newSvcProvider() (*svcProvider, error) {
 	values, err := env.Get(EnvUsername, EnvPassword)
 	if err != nil {
-		return nil, fmt.Errorf("joker: %v", err)
+		return nil, fmt.Errorf("joker: %w", err)
 	}
 
 	config := NewDefaultConfig()

providers/dns/ns1/ns1.go

@@ -95,7 +95,7 @@ func (d *DNSProvider) Present(domain, token, keyAuth string) error {
 	record, _, err := d.client.Records.Get(zone.Zone, dns01.UnFqdn(fqdn), "TXT")
 
 	// Create a new record
-	if err == rest.ErrRecordMissing || record == nil {
+	if errors.Is(err, rest.ErrRecordMissing) || record == nil {
 		log.Infof("Create a new record for [zone: %s, fqdn: %s, domain: %s]", zone.Zone, fqdn, domain)
 
 		record = dns.NewRecord(zone.Zone, dns01.UnFqdn(fqdn), "TXT")

providers/dns/pdns/client.go

@@ -2,6 +2,7 @@ package pdns
 
 import (
 	"encoding/json"
+	"errors"
 	"fmt"
 	"io"
 	"net/http"
@@ -172,7 +173,7 @@ func (d *DNSProvider) sendRequest(method, uri string, body io.Reader) (json.RawM
 	var msg json.RawMessage
 	err = json.NewDecoder(resp.Body).Decode(&msg)
 	if err != nil {
-		if err == io.EOF {
+		if errors.Is(err, io.EOF) {
 			// empty body
 			return nil, nil
 		}

providers/dns/sakuracloud/client.go

@@ -1,6 +1,7 @@
 package sakuracloud
 
 import (
+	"errors"
 	"fmt"
 	"net/http"
 	"strings"
@@ -70,9 +71,11 @@ func (d *DNSProvider) getHostedZone(domain string) (*sacloud.DNS, error) {
 
 	res, err := d.client.Reset().WithNameLike(zoneName).Find()
 	if err != nil {
-		if notFound, ok := err.(api.Error); ok && notFound.ResponseCode() == http.StatusNotFound {
+		var notFound api.Error
+		if errors.As(err, &notFound) && notFound.ResponseCode() == http.StatusNotFound {
 			return nil, fmt.Errorf("zone %s not found on SakuraCloud DNS: %w", zoneName, err)
 		}
+
 		return nil, fmt.Errorf("API call failed: %w", err)
 	}
 

providers/dns/yandex/yandex.go

@@ -58,7 +58,7 @@ type DNSProvider struct {
 func NewDNSProvider() (*DNSProvider, error) {
 	values, err := env.Get(EnvPddToken)
 	if err != nil {
-		return nil, fmt.Errorf("yandex: %v", err)
+		return nil, fmt.Errorf("yandex: %w", err)
 	}
 
 	config := NewDefaultConfig()
@@ -79,7 +79,7 @@ func NewDNSProviderConfig(config *Config) (*DNSProvider, error) {
 
 	client, err := internal.NewClient(config.PddToken)
 	if err != nil {
-		return nil, fmt.Errorf("yandex: %v", err)
+		return nil, fmt.Errorf("yandex: %w", err)
 	}
 
 	if config.HTTPClient != nil {
@@ -95,7 +95,7 @@ func (d *DNSProvider) Present(domain, token, keyAuth string) error {
 
 	rootDomain, subDomain, err := splitDomain(fqdn)
 	if err != nil {
-		return fmt.Errorf("yandex: %v", err)
+		return fmt.Errorf("yandex: %w", err)
 	}
 
 	data := internal.Record{
@@ -108,7 +108,7 @@ func (d *DNSProvider) Present(domain, token, keyAuth string) error {
 
 	_, err = d.client.AddRecord(data)
 	if err != nil {
-		return fmt.Errorf("yandex: %v", err)
+		return fmt.Errorf("yandex: %w", err)
 	}
 
 	return nil
@@ -120,12 +120,12 @@ func (d *DNSProvider) CleanUp(domain, token, keyAuth string) error {
 
 	rootDomain, subDomain, err := splitDomain(fqdn)
 	if err != nil {
-		return fmt.Errorf("yandex: %v", err)
+		return fmt.Errorf("yandex: %w", err)
 	}
 
 	records, err := d.client.GetRecords(rootDomain)
 	if err != nil {
-		return fmt.Errorf("yandex: %v", err)
+		return fmt.Errorf("yandex: %w", err)
 	}
 
 	var record *internal.Record
@@ -148,7 +148,7 @@ func (d *DNSProvider) CleanUp(domain, token, keyAuth string) error {
 
 	_, err = d.client.RemoveRecord(data)
 	if err != nil {
-		return fmt.Errorf("yandex: %v", err)
+		return fmt.Errorf("yandex: %w", err)
 	}
 	return nil
 }

registration/registar.go

@@ -58,8 +58,8 @@ func (r *Registrar) Register(options RegisterOptions) (*Resource, error) {
 	account, err := r.core.Accounts.New(accMsg)
 	if err != nil {
 		// FIXME seems impossible
-		errorDetails, ok := err.(acme.ProblemDetails)
+		var errorDetails acme.ProblemDetails
-		if !ok || errorDetails.HTTPStatus != http.StatusConflict {
+		if !errors.As(err, &errorDetails) || errorDetails.HTTPStatus != http.StatusConflict {
 			return nil, err
 		}
 	}
@@ -81,9 +81,9 @@ func (r *Registrar) RegisterWithExternalAccountBinding(options RegisterEABOption
 
 	account, err := r.core.Accounts.NewEAB(accMsg, options.Kid, options.HmacEncoded)
 	if err != nil {
-		errorDetails, ok := err.(acme.ProblemDetails)
 		// FIXME seems impossible
-		if !ok || errorDetails.HTTPStatus != http.StatusConflict {
+		var errorDetails acme.ProblemDetails
+		if !errors.As(err, &errorDetails) || errorDetails.HTTPStatus != http.StatusConflict {
 			return nil, err
 		}
 	}
@@ -96,7 +96,7 @@ func (r *Registrar) RegisterWithExternalAccountBinding(options RegisterEABOption
 // This is similar to the Register function,
 // but acting on an existing registration link and resource.
 func (r *Registrar) QueryRegistration() (*Resource, error) {
-	if r == nil || r.user == nil {
+	if r == nil || r.user == nil || r.user.GetRegistration() == nil {
 		return nil, errors.New("acme: cannot query the registration of a nil client or user")
 	}