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package acme
import (
"crypto"
"crypto/x509"
"encoding/base64"
"encoding/pem"
"fmt"
"net/http"
)
func (c Client) decodeCertificateChain(body []byte, resp *http.Response, account Account) ([]*x509.Certificate, error) {
var certs []*x509.Certificate
for {
var p *pem.Block
p, body = pem.Decode(body)
if p == nil {
break
}
cert, err := x509.ParseCertificate(p.Bytes)
if err != nil {
return certs, fmt.Errorf("acme: error parsing certificate: %v", err)
}
certs = append(certs, cert)
}
up := fetchLink(resp, "up")
if up != "" {
upCerts, err := c.FetchCertificates(account, up)
if err != nil {
return certs, fmt.Errorf("acme: error fetching up cert: %v", err)
}
if len(upCerts) != 0 {
certs = append(certs, upCerts...)
}
}
return certs, nil
}
// FetchCertificates downloads a certificate chain from a url given in an order certificate.
func (c Client) FetchCertificates(account Account, certificateURL string) ([]*x509.Certificate, error) {
resp, body, err := c.postRaw(0, certificateURL, account.URL, account.PrivateKey, "", []int{http.StatusOK})
if err != nil {
return nil, err
}
return c.decodeCertificateChain(body, resp, account)
}
// FetchAllCertificates downloads a certificate chain from a url given in an order certificate, as well as any alternate certificates if provided.
// Returns a mapping of certificate urls to the certificate chain.
func (c Client) FetchAllCertificates(account Account, certificateURL string) (map[string][]*x509.Certificate, error) {
resp, body, err := c.postRaw(0, certificateURL, account.URL, account.PrivateKey, "", []int{http.StatusOK})
if err != nil {
return nil, err
}
certChain, err := c.decodeCertificateChain(body, resp, account)
if err != nil {
return nil, err
}
certs := map[string][]*x509.Certificate{
certificateURL: certChain,
}
alternates := fetchLinks(resp, "alternate")
for _, altURL := range alternates {
altResp, altBody, err := c.postRaw(0, altURL, account.URL, account.PrivateKey, "", []int{http.StatusOK})
if err != nil {
return certs, fmt.Errorf("acme: error fetching alt cert chain at %q - %v", altURL, err)
}
altCertChain, err := c.decodeCertificateChain(altBody, altResp, account)
if err != nil {
return certs, fmt.Errorf("acme: error decoding alt cert chain at %q - %v", altURL, err)
}
certs[altURL] = altCertChain
}
return certs, nil
}
// RevokeCertificate revokes a given certificate given the certificate key or account key, and a reason.
func (c Client) RevokeCertificate(account Account, cert *x509.Certificate, key crypto.Signer, reason int) error {
revokeReq := struct {
Certificate string `json:"certificate"`
Reason int `json:"reason"`
}{
Certificate: base64.RawURLEncoding.EncodeToString(cert.Raw),
Reason: reason,
}
kid := ""
if key == account.PrivateKey {
kid = account.URL
}
if _, err := c.post(c.dir.RevokeCert, kid, key, revokeReq, nil, http.StatusOK); err != nil {
return err
}
return nil
}
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