traefik/provider/acme/account.go

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package acme
import (
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"context"
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"crypto"
"crypto/rand"
"crypto/rsa"
"crypto/x509"
"github.com/containous/traefik/log"
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"github.com/xenolf/lego/acme"
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)
// Account is used to store lets encrypt registration info
type Account struct {
Email string
Registration *acme.RegistrationResource
PrivateKey []byte
KeyType acme.KeyType
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}
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const (
// RegistrationURLPathV1Regexp is a regexp which match ACME registration URL in the V1 format
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RegistrationURLPathV1Regexp = `^.*/acme/reg/\d+$`
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)
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// NewAccount creates an account
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func NewAccount(ctx context.Context, email string, keyTypeValue string) (*Account, error) {
keyType := GetKeyType(ctx, keyTypeValue)
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// Create a user. New accounts need an email and private key to start
privateKey, err := rsa.GenerateKey(rand.Reader, 4096)
if err != nil {
return nil, err
}
return &Account{
Email: email,
PrivateKey: x509.MarshalPKCS1PrivateKey(privateKey),
KeyType: keyType,
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}, nil
}
// GetEmail returns email
func (a *Account) GetEmail() string {
return a.Email
}
// GetRegistration returns lets encrypt registration resource
func (a *Account) GetRegistration() *acme.RegistrationResource {
return a.Registration
}
// GetPrivateKey returns private key
func (a *Account) GetPrivateKey() crypto.PrivateKey {
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privateKey, err := x509.ParsePKCS1PrivateKey(a.PrivateKey)
if err != nil {
log.WithoutContext().WithField(log.ProviderName, "acme").
Errorf("Cannot unmarshal private key %+v: %v", a.PrivateKey, err)
return nil
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}
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return privateKey
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}
// GetKeyType used to determine which algo to used
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func GetKeyType(ctx context.Context, value string) acme.KeyType {
logger := log.FromContext(ctx)
switch value {
case "EC256":
return acme.EC256
case "EC384":
return acme.EC384
case "RSA2048":
return acme.RSA2048
case "RSA4096":
return acme.RSA4096
case "RSA8192":
return acme.RSA8192
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case "":
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logger.Infof("The key type is empty. Use default key type %v.", acme.RSA4096)
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return acme.RSA4096
default:
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logger.Infof("Unable to determine the key type value %q: falling back on %v.", value, acme.RSA4096)
return acme.RSA4096
}
}