mirror of
https://github.com/go-acme/lego.git
synced 2024-12-23 09:15:11 +02:00
100 lines
2.5 KiB
Go
100 lines
2.5 KiB
Go
package api
|
|
|
|
import (
|
|
"crypto/x509"
|
|
"encoding/pem"
|
|
"errors"
|
|
"io/ioutil"
|
|
"net/http"
|
|
|
|
"github.com/go-acme/lego/v3/acme"
|
|
"github.com/go-acme/lego/v3/certcrypto"
|
|
"github.com/go-acme/lego/v3/log"
|
|
)
|
|
|
|
// maxBodySize is the maximum size of body that we will read.
|
|
const maxBodySize = 1024 * 1024
|
|
|
|
type CertificateService service
|
|
|
|
// Get Returns the certificate and the issuer certificate.
|
|
// 'bundle' is only applied if the issuer is provided by the 'up' link.
|
|
func (c *CertificateService) Get(certURL string, bundle bool) ([]byte, []byte, error) {
|
|
cert, up, err := c.get(certURL)
|
|
if err != nil {
|
|
return nil, nil, err
|
|
}
|
|
|
|
// Get issuerCert from bundled response from Let's Encrypt
|
|
// See https://community.letsencrypt.org/t/acme-v2-no-up-link-in-response/64962
|
|
_, issuer := pem.Decode(cert)
|
|
if issuer != nil {
|
|
return cert, issuer, nil
|
|
}
|
|
|
|
issuer, err = c.getIssuerFromLink(up)
|
|
if err != nil {
|
|
// If we fail to acquire the issuer cert, return the issued certificate - do not fail.
|
|
log.Warnf("acme: Could not bundle issuer certificate [%s]: %v", certURL, err)
|
|
} else if len(issuer) > 0 {
|
|
// If bundle is true, we want to return a certificate bundle.
|
|
// To do this, we append the issuer cert to the issued cert.
|
|
if bundle {
|
|
cert = append(cert, issuer...)
|
|
}
|
|
}
|
|
|
|
return cert, issuer, nil
|
|
}
|
|
|
|
// Revoke Revokes a certificate.
|
|
func (c *CertificateService) Revoke(req acme.RevokeCertMessage) error {
|
|
_, err := c.core.post(c.core.GetDirectory().RevokeCertURL, req, nil)
|
|
return err
|
|
}
|
|
|
|
// get Returns the certificate and the "up" link.
|
|
func (c *CertificateService) get(certURL string) ([]byte, string, error) {
|
|
if len(certURL) == 0 {
|
|
return nil, "", errors.New("certificate[get]: empty URL")
|
|
}
|
|
|
|
resp, err := c.core.postAsGet(certURL, nil)
|
|
if err != nil {
|
|
return nil, "", err
|
|
}
|
|
|
|
cert, err := ioutil.ReadAll(http.MaxBytesReader(nil, resp.Body, maxBodySize))
|
|
if err != nil {
|
|
return nil, "", err
|
|
}
|
|
|
|
// The issuer certificate link may be supplied via an "up" link
|
|
// in the response headers of a new certificate.
|
|
// See https://tools.ietf.org/html/rfc8555#section-7.4.2
|
|
up := getLink(resp.Header, "up")
|
|
|
|
return cert, up, err
|
|
}
|
|
|
|
// getIssuerFromLink requests the issuer certificate
|
|
func (c *CertificateService) getIssuerFromLink(up string) ([]byte, error) {
|
|
if len(up) == 0 {
|
|
return nil, nil
|
|
}
|
|
|
|
log.Infof("acme: Requesting issuer cert from %s", up)
|
|
|
|
cert, _, err := c.get(up)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
_, err = x509.ParseCertificate(cert)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
return certcrypto.PEMEncode(certcrypto.DERCertificateBytes(cert)), nil
|
|
}
|