Migrate to go-acme/lego.

vendor/github.com/go-acme/lego/providers/dns/exec/exec.go

@@ -0,0 +1,107 @@
+// Package exec implements a DNS provider which runs a program for adding/removing the DNS record.
+package exec
+
+import (
+	"errors"
+	"fmt"
+	"os"
+	"os/exec"
+	"time"
+
+	"github.com/go-acme/lego/challenge/dns01"
+	"github.com/go-acme/lego/log"
+	"github.com/go-acme/lego/platform/config/env"
+)
+
+// Config Provider configuration.
+type Config struct {
+	Program            string
+	Mode               string
+	PropagationTimeout time.Duration
+	PollingInterval    time.Duration
+}
+
+// NewDefaultConfig returns a default configuration for the DNSProvider
+func NewDefaultConfig() *Config {
+	return &Config{
+		PropagationTimeout: env.GetOrDefaultSecond("EXEC_PROPAGATION_TIMEOUT", dns01.DefaultPropagationTimeout),
+		PollingInterval:    env.GetOrDefaultSecond("EXEC_POLLING_INTERVAL", dns01.DefaultPollingInterval),
+	}
+}
+
+// DNSProvider adds and removes the record for the DNS challenge by calling a
+// program with command-line parameters.
+type DNSProvider struct {
+	config *Config
+}
+
+// NewDNSProvider returns a new DNS provider which runs the program in the
+// environment variable EXEC_PATH for adding and removing the DNS record.
+func NewDNSProvider() (*DNSProvider, error) {
+	values, err := env.Get("EXEC_PATH")
+	if err != nil {
+		return nil, fmt.Errorf("exec: %v", err)
+	}
+
+	config := NewDefaultConfig()
+	config.Program = values["EXEC_PATH"]
+	config.Mode = os.Getenv("EXEC_MODE")
+
+	return NewDNSProviderConfig(config)
+}
+
+// NewDNSProviderConfig returns a new DNS provider which runs the given configuration
+// for adding and removing the DNS record.
+func NewDNSProviderConfig(config *Config) (*DNSProvider, error) {
+	if config == nil {
+		return nil, errors.New("the configuration is nil")
+	}
+
+	return &DNSProvider{config: config}, nil
+}
+
+// Present creates a TXT record to fulfill the dns-01 challenge.
+func (d *DNSProvider) Present(domain, token, keyAuth string) error {
+	var args []string
+	if d.config.Mode == "RAW" {
+		args = []string{"present", "--", domain, token, keyAuth}
+	} else {
+		fqdn, value := dns01.GetRecord(domain, keyAuth)
+		args = []string{"present", fqdn, value}
+	}
+
+	cmd := exec.Command(d.config.Program, args...)
+
+	output, err := cmd.CombinedOutput()
+	if len(output) > 0 {
+		log.Println(string(output))
+	}
+
+	return err
+}
+
+// CleanUp removes the TXT record matching the specified parameters
+func (d *DNSProvider) CleanUp(domain, token, keyAuth string) error {
+	var args []string
+	if d.config.Mode == "RAW" {
+		args = []string{"cleanup", "--", domain, token, keyAuth}
+	} else {
+		fqdn, value := dns01.GetRecord(domain, keyAuth)
+		args = []string{"cleanup", fqdn, value}
+	}
+
+	cmd := exec.Command(d.config.Program, args...)
+
+	output, err := cmd.CombinedOutput()
+	if len(output) > 0 {
+		log.Println(string(output))
+	}
+
+	return err
+}
+
+// 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
+}