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path: root/cmd/acme/main.go
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// ACME CLI tool
package main

import (
	"flag"
	"log"

	"dim13.org/acme"
)

var (
	confName        = flag.String("conf", "", "configuration file")
	forceRenew      = flag.Bool("force", false, "force renew")
	httpSol, tlsSol acme.Solver
)

func dialProvider(p provider) error {
	log.Println("Dial", p.Directory)
	prov, err := acme.DialProvider(p.Directory)
	if err != nil {
		return err
	}
	for _, a := range p.Account {
		if err := loadAccount(prov, a); err != nil {
			return err
		}
	}
	return nil
}

func loadAccount(prov *acme.Provider, a account) error {
	var mustRegister bool
	key, err := a.Load()
	if err != nil {
		key, err = acme.NewKey(a.KeySize)
		if err != nil {
			return err
		}
		if err := a.Save(key); err != nil {
			return err
		}
		mustRegister = true
	}

	acc, err := acme.NewAccount(key)
	if err != nil {
		return err
	}

	if mustRegister {
		con, err := acme.NewContacts(a.Mail, a.Phone)
		if err != nil {
			return err
		}

		log.Println("Register", con)
		if err := prov.Register(acc, con); err != nil {
			return err
		}
	}

	for _, d := range a.Domain {
		if err := requestCert(prov, acc, d); err != nil {
			return err
		}
	}
	return nil
}

func requestCert(prov *acme.Provider, acc *acme.Account, d domain) error {
	c, err := d.Load()
	if err != nil {
		return err
	}
	if c.Leaf != nil && !d.renew(c.Leaf) && !*forceRenew {
		log.Println("valid until", c.Leaf.NotAfter, "skip")
		return nil
	}

	key, err := acme.NewKey(d.KeySize)
	if err != nil {
		return err
	}

	des := acme.NewDesire(key, d.Altnames)
	if d.Webroot != "" {
		des.RegisterSolver(acme.NewWebrootSolver(d.Webroot))
	} else if httpSol != nil {
		des.RegisterSolver(httpSol)
	}

	if tlsSol != nil {
		des.RegisterSolver(tlsSol)
	}

	log.Println("Authorize", d.Altnames)
	if err := prov.Authorize(acc, des); err != nil {
		return err
	}

	log.Println("Request bundle")
	cert, err := prov.Bundle(acc, des)
	if err != nil {
		return err
	}

	log.Println("Save", d.CrtFile, d.KeyFile)
	if err := d.Save(cert); err != nil {
		return err
	}

	return nil
}

func main() {
	flag.Parse()

	conf, err := LoadConfig(*confName)
	if err != nil {
		log.Fatal(err)
	}

	httpSol, err = acme.NewHTTPSolver(conf.Listen)
	if err != nil {
		log.Println("HTTP Solver", err)
	}
	tlsSol, err = acme.NewTLSSolver(conf.ListenTLS)
	if err != nil {
		log.Println("TLS Solver", err)
	}

	for _, p := range conf.Provider {
		if err := dialProvider(p); err != nil {
			log.Fatal(err)
		}
	}
}