132 lines
3.6 KiB
Go
132 lines
3.6 KiB
Go
package api
|
|
|
|
import (
|
|
"crypto/x509"
|
|
"encoding/pem"
|
|
"errors"
|
|
"io/ioutil"
|
|
"net/http"
|
|
|
|
"github.com/go-acme/lego/v4/acme"
|
|
"github.com/go-acme/lego/v4/certcrypto"
|
|
"github.com/go-acme/lego/v4/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, _, err := c.get(certURL, bundle)
|
|
if err != nil {
|
|
return nil, nil, err
|
|
}
|
|
|
|
return cert.Cert, cert.Issuer, nil
|
|
}
|
|
|
|
// GetAll the certificates and the alternate certificates.
|
|
// bundle' is only applied if the issuer is provided by the 'up' link.
|
|
func (c *CertificateService) GetAll(certURL string, bundle bool) (map[string]*acme.RawCertificate, error) {
|
|
cert, headers, err := c.get(certURL, bundle)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
certs := map[string]*acme.RawCertificate{certURL: cert}
|
|
|
|
// URLs of "alternate" link relation
|
|
// - https://tools.ietf.org/html/rfc8555#section-7.4.2
|
|
alts := getLinks(headers, "alternate")
|
|
|
|
for _, alt := range alts {
|
|
altCert, _, err := c.get(alt, bundle)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
certs[alt] = altCert
|
|
}
|
|
|
|
return certs, 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, bundle bool) (*acme.RawCertificate, http.Header, error) {
|
|
if len(certURL) == 0 {
|
|
return nil, nil, errors.New("certificate[get]: empty URL")
|
|
}
|
|
|
|
resp, err := c.core.postAsGet(certURL, nil)
|
|
if err != nil {
|
|
return nil, nil, err
|
|
}
|
|
|
|
data, err := ioutil.ReadAll(http.MaxBytesReader(nil, resp.Body, maxBodySize))
|
|
if err != nil {
|
|
return nil, resp.Header, err
|
|
}
|
|
|
|
cert := c.getCertificateChain(data, resp.Header, bundle, certURL)
|
|
|
|
return cert, resp.Header, err
|
|
}
|
|
|
|
// getCertificateChain Returns the certificate and the issuer certificate.
|
|
func (c *CertificateService) getCertificateChain(cert []byte, headers http.Header, bundle bool, certURL string) *acme.RawCertificate {
|
|
// 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 &acme.RawCertificate{Cert: cert, Issuer: issuer}
|
|
}
|
|
|
|
// 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(headers, "up")
|
|
|
|
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 &acme.RawCertificate{Cert: cert, Issuer: issuer}
|
|
}
|
|
|
|
// 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, false)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
_, err = x509.ParseCertificate(cert.Cert)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
return certcrypto.PEMEncode(certcrypto.DERCertificateBytes(cert.Cert)), nil
|
|
}
|