feat: Add DNS provider for Czechia

providers/dns/czechia/czechia.go

@@ -0,0 +1,159 @@
+// Package czechia implements a DNS provider for solving the DNS-01 challenge using Czechia.
+package czechia
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"net/http"
+	"time"
+
+	"github.com/go-acme/lego/v4/challenge/dns01"
+	"github.com/go-acme/lego/v4/platform/config/env"
+	"github.com/go-acme/lego/v4/providers/dns/czechia/internal"
+	"github.com/go-acme/lego/v4/providers/dns/internal/clientdebug"
+)
+
+// Environment variables names.
+const (
+	envNamespace = "CZECHIA_"
+
+	EnvToken = envNamespace + "TOKEN"
+
+	EnvTTL                = envNamespace + "TTL"
+	EnvPropagationTimeout = envNamespace + "PROPAGATION_TIMEOUT"
+	EnvPollingInterval    = envNamespace + "POLLING_INTERVAL"
+	EnvHTTPTimeout        = envNamespace + "HTTP_TIMEOUT"
+)
+
+// Config is used to configure the creation of the DNSProvider.
+type Config struct {
+	Token string
+
+	PropagationTimeout time.Duration
+	PollingInterval    time.Duration
+	TTL                int
+	HTTPClient         *http.Client
+}
+
+// NewDefaultConfig returns a default configuration for the DNSProvider.
+func NewDefaultConfig() *Config {
+	return &Config{
+		TTL:                env.GetOrDefaultInt(EnvTTL, dns01.DefaultTTL),
+		PropagationTimeout: env.GetOrDefaultSecond(EnvPropagationTimeout, dns01.DefaultPropagationTimeout),
+		PollingInterval:    env.GetOrDefaultSecond(EnvPollingInterval, dns01.DefaultPollingInterval),
+		HTTPClient: &http.Client{
+			Timeout: env.GetOrDefaultSecond(EnvHTTPTimeout, 30*time.Second),
+		},
+	}
+}
+
+// DNSProvider implements the challenge.Provider interface.
+type DNSProvider struct {
+	config *Config
+	client *internal.Client
+}
+
+// NewDNSProvider returns a DNSProvider instance configured for Czechia.
+func NewDNSProvider() (*DNSProvider, error) {
+	values, err := env.Get(EnvToken)
+	if err != nil {
+		return nil, fmt.Errorf("czechia: %w", err)
+	}
+
+	config := NewDefaultConfig()
+	config.Token = values[EnvToken]
+
+	return NewDNSProviderConfig(config)
+}
+
+// NewDNSProviderConfig return a DNSProvider instance configured for Czechia.
+func NewDNSProviderConfig(config *Config) (*DNSProvider, error) {
+	if config == nil {
+		return nil, errors.New("czechia: the configuration of the DNS provider is nil")
+	}
+
+	client, err := internal.NewClient(config.Token)
+	if err != nil {
+		return nil, fmt.Errorf("czechia: %w", err)
+	}
+
+	if config.HTTPClient != nil {
+		client.HTTPClient = config.HTTPClient
+	}
+
+	client.HTTPClient = clientdebug.Wrap(client.HTTPClient)
+
+	return &DNSProvider{
+		config: config,
+		client: client,
+	}, nil
+}
+
+// Present creates a TXT record using the specified parameters.
+func (d *DNSProvider) Present(domain, token, keyAuth string) error {
+	ctx := context.Background()
+
+	info := dns01.GetChallengeInfo(domain, keyAuth)
+
+	authZone, err := dns01.FindZoneByFqdn(info.EffectiveFQDN)
+	if err != nil {
+		return fmt.Errorf("czechia: could not find zone for domain %q: %w", domain, err)
+	}
+
+	subDomain, err := dns01.ExtractSubDomain(info.EffectiveFQDN, authZone)
+	if err != nil {
+		return fmt.Errorf("czechia: %w", err)
+	}
+
+	record := internal.TXTRecord{
+		Hostname:    subDomain,
+		Text:        info.Value,
+		TTL:         d.config.TTL,
+		PublishZone: 1,
+	}
+
+	err = d.client.AddTXTRecord(ctx, dns01.UnFqdn(authZone), record)
+	if err != nil {
+		return fmt.Errorf("czechia: add TXT record: %w", err)
+	}
+
+	return nil
+}
+
+// CleanUp removes the TXT record matching the specified parameters.
+func (d *DNSProvider) CleanUp(domain, token, keyAuth string) error {
+	ctx := context.Background()
+
+	info := dns01.GetChallengeInfo(domain, keyAuth)
+
+	authZone, err := dns01.FindZoneByFqdn(info.EffectiveFQDN)
+	if err != nil {
+		return fmt.Errorf("czechia: could not find zone for domain %q: %w", domain, err)
+	}
+
+	subDomain, err := dns01.ExtractSubDomain(info.EffectiveFQDN, authZone)
+	if err != nil {
+		return fmt.Errorf("czechia: %w", err)
+	}
+
+	record := internal.TXTRecord{
+		Hostname:    subDomain,
+		Text:        info.Value,
+		TTL:         d.config.TTL,
+		PublishZone: 1,
+	}
+
+	err = d.client.DeleteTXTRecord(ctx, dns01.UnFqdn(authZone), record)
+	if err != nil {
+		return fmt.Errorf("czechia: delete TXT record: %w", err)
+	}
+
+	return nil
+}
+
+// Timeout returns the timeout and interval to use when checking for DNS propagation.
+// Adjusting here to cope with spikes in propagation times.
+func (d *DNSProvider) Timeout() (timeout, interval time.Duration) {
+	return d.config.PropagationTimeout, d.config.PollingInterval
+}

providers/dns/czechia/czechia.toml

@@ -0,0 +1,22 @@
+Name = "Czechia"
+Description = ''''''
+URL = "https://www.czechia.com/"
+Code = "czechia"
+Since = "v4.33.0"
+
+Example = '''
+CZECHIA_TOKEN="xxxxxxxxxxxxxxxxxxxxx" \
+lego --dns czechia -d '*.example.com' -d example.com run
+'''
+
+[Configuration]
+  [Configuration.Credentials]
+    CZECHIA_TOKEN = "Authorization token"
+  [Configuration.Additional]
+    CZECHIA_POLLING_INTERVAL = "Time between DNS propagation check in seconds (Default: 2)"
+    CZECHIA_PROPAGATION_TIMEOUT = "Maximum waiting time for DNS propagation in seconds (Default: 60)"
+    CZECHIA_TTL = "The TTL of the TXT record used for the DNS challenge in seconds (Default: 120)"
+    CZECHIA_HTTP_TIMEOUT = "API request timeout in seconds (Default: 30)"
+
+[Links]
+  API = "https://api.czechia.com/swagger/index.html"

providers/dns/czechia/czechia_test.go

@@ -0,0 +1,165 @@
+package czechia
+
+import (
+	"net/http/httptest"
+	"net/url"
+	"testing"
+
+	"github.com/go-acme/lego/v4/platform/tester"
+	"github.com/go-acme/lego/v4/platform/tester/servermock"
+	"github.com/stretchr/testify/require"
+)
+
+const envDomain = envNamespace + "DOMAIN"
+
+var envTest = tester.NewEnvTest(EnvToken).WithDomain(envDomain)
+
+func TestNewDNSProvider(t *testing.T) {
+	testCases := []struct {
+		desc     string
+		envVars  map[string]string
+		expected string
+	}{
+		{
+			desc: "success",
+			envVars: map[string]string{
+				EnvToken: "secret",
+			},
+		},
+		{
+			desc:     "missing credentials",
+			envVars:  map[string]string{},
+			expected: "czechia: some credentials information are missing: CZECHIA_TOKEN",
+		},
+	}
+
+	for _, test := range testCases {
+		t.Run(test.desc, func(t *testing.T) {
+			defer envTest.RestoreEnv()
+
+			envTest.ClearEnv()
+
+			envTest.Apply(test.envVars)
+
+			p, err := NewDNSProvider()
+
+			if test.expected == "" {
+				require.NoError(t, err)
+				require.NotNil(t, p)
+				require.NotNil(t, p.config)
+				require.NotNil(t, p.client)
+			} else {
+				require.EqualError(t, err, test.expected)
+			}
+		})
+	}
+}
+
+func TestNewDNSProviderConfig(t *testing.T) {
+	testCases := []struct {
+		desc     string
+		token    string
+		expected string
+	}{
+		{
+			desc:  "success",
+			token: "secret",
+		},
+		{
+			desc:     "missing credentials",
+			expected: "czechia: credentials missing",
+		},
+	}
+
+	for _, test := range testCases {
+		t.Run(test.desc, func(t *testing.T) {
+			config := NewDefaultConfig()
+			config.Token = test.token
+
+			p, err := NewDNSProviderConfig(config)
+
+			if test.expected == "" {
+				require.NoError(t, err)
+				require.NotNil(t, p)
+				require.NotNil(t, p.config)
+				require.NotNil(t, p.client)
+			} else {
+				require.EqualError(t, err, test.expected)
+			}
+		})
+	}
+}
+
+func TestLivePresent(t *testing.T) {
+	if !envTest.IsLiveTest() {
+		t.Skip("skipping live test")
+	}
+
+	envTest.RestoreEnv()
+
+	provider, err := NewDNSProvider()
+	require.NoError(t, err)
+
+	err = provider.Present(envTest.GetDomain(), "", "123d==")
+	require.NoError(t, err)
+}
+
+func TestLiveCleanUp(t *testing.T) {
+	if !envTest.IsLiveTest() {
+		t.Skip("skipping live test")
+	}
+
+	envTest.RestoreEnv()
+
+	provider, err := NewDNSProvider()
+	require.NoError(t, err)
+
+	err = provider.CleanUp(envTest.GetDomain(), "", "123d==")
+	require.NoError(t, err)
+}
+
+func mockBuilder() *servermock.Builder[*DNSProvider] {
+	return servermock.NewBuilder(
+		func(server *httptest.Server) (*DNSProvider, error) {
+			config := NewDefaultConfig()
+			config.Token = "secret"
+			config.HTTPClient = server.Client()
+
+			p, err := NewDNSProviderConfig(config)
+			if err != nil {
+				return nil, err
+			}
+
+			p.client.BaseURL, _ = url.Parse(server.URL)
+
+			return p, nil
+		},
+		servermock.CheckHeader().
+			WithJSONHeaders().
+			With("AuthorizationToken", "secret"),
+	)
+}
+
+func TestDNSProvider_Present(t *testing.T) {
+	provider := mockBuilder().
+		Route("POST /DNS/example.com/TXT",
+			servermock.Noop(),
+			servermock.CheckRequestJSONBodyFromInternal("add_txt_record-request.json"),
+		).
+		Build(t)
+
+	err := provider.Present("example.com", "abc", "123d==")
+	require.NoError(t, err)
+}
+
+func TestDNSProvider_CleanUp(t *testing.T) {
+	provider := mockBuilder().
+		Route("DELETE /DNS/example.com/TXT",
+			servermock.Noop(),
+			servermock.CheckRequestJSONBodyFromInternal("add_txt_record-request.json"),
+		).
+		Build(t)
+
+	err := provider.CleanUp("example.com", "abc", "123d==")
+	require.NoError(t, err)
+}

providers/dns/czechia/internal/client.go

@@ -0,0 +1,124 @@
+package internal
+
+import (
+	"bytes"
+	"context"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"io"
+	"net/http"
+	"net/url"
+	"time"
+
+	"github.com/go-acme/lego/v4/providers/dns/internal/errutils"
+	"github.com/go-acme/lego/v4/providers/dns/internal/useragent"
+)
+
+const defaultBaseURL = "https://api.czechia.com/api"
+
+const authorizationTokenHeader = "AuthorizationToken"
+
+// Client the Czechia API client.
+type Client struct {
+	token string
+
+	BaseURL    *url.URL
+	HTTPClient *http.Client
+}
+
+// NewClient creates a new Client.
+func NewClient(token string) (*Client, error) {
+	if token == "" {
+		return nil, errors.New("credentials missing")
+	}
+
+	baseURL, _ := url.Parse(defaultBaseURL)
+
+	return &Client{
+		token:      token,
+		BaseURL:    baseURL,
+		HTTPClient: &http.Client{Timeout: 10 * time.Second},
+	}, nil
+}
+
+func (c *Client) AddTXTRecord(ctx context.Context, domain string, record TXTRecord) error {
+	endpoint := c.BaseURL.JoinPath("DNS", domain, "TXT")
+
+	req, err := newJSONRequest(ctx, http.MethodPost, endpoint, record)
+	if err != nil {
+		return err
+	}
+
+	return c.do(req, nil)
+}
+
+func (c *Client) DeleteTXTRecord(ctx context.Context, domain string, record TXTRecord) error {
+	endpoint := c.BaseURL.JoinPath("DNS", domain, "TXT")
+
+	req, err := newJSONRequest(ctx, http.MethodDelete, endpoint, record)
+	if err != nil {
+		return err
+	}
+
+	return c.do(req, nil)
+}
+
+func (c *Client) do(req *http.Request, result any) error {
+	useragent.SetHeader(req.Header)
+
+	req.Header.Set(authorizationTokenHeader, c.token)
+
+	resp, err := c.HTTPClient.Do(req)
+	if err != nil {
+		return errutils.NewHTTPDoError(req, err)
+	}
+
+	defer func() { _ = resp.Body.Close() }()
+
+	if resp.StatusCode/100 != 2 {
+		raw, _ := io.ReadAll(resp.Body)
+
+		return errutils.NewUnexpectedStatusCodeError(req, resp.StatusCode, raw)
+	}
+
+	if result == nil {
+		return nil
+	}
+
+	raw, err := io.ReadAll(resp.Body)
+	if err != nil {
+		return errutils.NewReadResponseError(req, resp.StatusCode, err)
+	}
+
+	err = json.Unmarshal(raw, result)
+	if err != nil {
+		return errutils.NewUnmarshalError(req, resp.StatusCode, raw, err)
+	}
+
+	return nil
+}
+
+func newJSONRequest(ctx context.Context, method string, endpoint *url.URL, payload any) (*http.Request, error) {
+	buf := new(bytes.Buffer)
+
+	if payload != nil {
+		err := json.NewEncoder(buf).Encode(payload)
+		if err != nil {
+			return nil, fmt.Errorf("failed to create request JSON body: %w", err)
+		}
+	}
+
+	req, err := http.NewRequestWithContext(ctx, method, endpoint.String(), buf)
+	if err != nil {
+		return nil, fmt.Errorf("unable to create request: %w", err)
+	}
+
+	req.Header.Set("Accept", "application/json")
+
+	if payload != nil {
+		req.Header.Set("Content-Type", "application/json")
+	}
+
+	return req, nil
+}

providers/dns/czechia/internal/client_test.go

@@ -0,0 +1,67 @@
+package internal
+
+import (
+	"net/http/httptest"
+	"net/url"
+	"testing"
+
+	"github.com/go-acme/lego/v4/platform/tester/servermock"
+	"github.com/stretchr/testify/require"
+)
+
+func mockBuilder() *servermock.Builder[*Client] {
+	return servermock.NewBuilder[*Client](
+		func(server *httptest.Server) (*Client, error) {
+			client, err := NewClient("secret")
+			if err != nil {
+				return nil, err
+			}
+
+			client.BaseURL, _ = url.Parse(server.URL)
+			client.HTTPClient = server.Client()
+
+			return client, nil
+		},
+		servermock.CheckHeader().
+			WithJSONHeaders().
+			With(authorizationTokenHeader, "secret"),
+	)
+}
+
+func TestClient_AddTXTRecord(t *testing.T) {
+	client := mockBuilder().
+		Route("POST /DNS/example.com/TXT",
+			servermock.Noop(),
+			servermock.CheckRequestJSONBodyFromFixture("add_txt_record-request.json"),
+		).
+		Build(t)
+
+	record := TXTRecord{
+		Hostname:    "_acme-challenge",
+		Text:        "ADw2sEd82DUgXcQ9hNBZThJs7zVJkR5v9JeSbAb9mZY",
+		TTL:         120,
+		PublishZone: 1,
+	}
+
+	err := client.AddTXTRecord(t.Context(), "example.com", record)
+	require.NoError(t, err)
+}
+
+func TestClient_DeleteTXTRecord(t *testing.T) {
+	client := mockBuilder().
+		Route("DELETE /DNS/example.com/TXT",
+			servermock.Noop(),
+			servermock.CheckRequestJSONBodyFromFixture("add_txt_record-request.json"),
+		).
+		Build(t)
+
+	record := TXTRecord{
+		Hostname:    "_acme-challenge",
+		Text:        "ADw2sEd82DUgXcQ9hNBZThJs7zVJkR5v9JeSbAb9mZY",
+		TTL:         120,
+		PublishZone: 1,
+	}
+
+	err := client.DeleteTXTRecord(t.Context(), "example.com", record)
+	require.NoError(t, err)
+}

providers/dns/czechia/internal/fixtures/add_txt_record-request.json

@@ -0,0 +1,6 @@
+{
+  "hostName": "_acme-challenge",
+  "text": "ADw2sEd82DUgXcQ9hNBZThJs7zVJkR5v9JeSbAb9mZY",
+  "ttl": 120,
+  "publishZone": 1
+}

providers/dns/czechia/internal/fixtures/delete_txt_record-request.json

@@ -0,0 +1,6 @@
+{
+  "hostName": "_acme-challenge",
+  "text": "ADw2sEd82DUgXcQ9hNBZThJs7zVJkR5v9JeSbAb9mZY",
+  "ttl": 120,
+  "publishZone": 1
+}

providers/dns/czechia/internal/types.go

@@ -0,0 +1,8 @@
+package internal
+
+type TXTRecord struct {
+	Hostname    string `json:"hostName,omitempty"`
+	Text        string `json:"text,omitempty"`
+	TTL         int    `json:"ttl,omitempty"`
+	PublishZone int    `json:"publishZone,omitempty"`
+}