lego/providers/dns/exec/exec.go

100 lines
2.5 KiB
Go

package exec
import (
"errors"
"fmt"
"os"
"os/exec"
"strconv"
"github.com/xenolf/lego/acme"
"github.com/xenolf/lego/log"
"github.com/xenolf/lego/platform/config/env"
)
// Config Provider configuration.
type Config struct {
Program string
Mode string
}
// 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)
}
return NewDNSProviderConfig(&Config{
Program: values["EXEC_PATH"],
Mode: os.Getenv("EXEC_MODE"),
})
}
// 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
}
// NewDNSProviderProgram returns a new DNS provider which runs the given program
// for adding and removing the DNS record.
// Deprecated: use NewDNSProviderConfig instead
func NewDNSProviderProgram(program string) (*DNSProvider, error) {
if len(program) == 0 {
return nil, errors.New("the program is undefined")
}
return NewDNSProviderConfig(&Config{Program: program})
}
// Present creates a TXT record to fulfil 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, ttl := acme.DNS01Record(domain, keyAuth)
args = []string{"present", fqdn, value, strconv.Itoa(ttl)}
}
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, ttl := acme.DNS01Record(domain, keyAuth)
args = []string{"cleanup", fqdn, value, strconv.Itoa(ttl)}
}
cmd := exec.Command(d.config.Program, args...)
output, err := cmd.CombinedOutput()
if len(output) > 0 {
log.Println(string(output))
}
return err
}