forked from TrueCloudLab/lego
87 lines
2 KiB
Go
87 lines
2 KiB
Go
package acme
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import (
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"crypto/rsa"
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"crypto/sha256"
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"crypto/tls"
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"encoding/hex"
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"fmt"
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"net"
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"net/http"
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)
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type tlsSNIChallenge struct {
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jws *jws
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validate validateFunc
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iface string
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port string
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}
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func (t *tlsSNIChallenge) Solve(chlng challenge, domain string) error {
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// FIXME: https://github.com/ietf-wg-acme/acme/pull/22
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// Currently we implement this challenge to track boulder, not the current spec!
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logf("[INFO][%s] acme: Trying to solve TLS-SNI-01", domain)
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// Generate the Key Authorization for the challenge
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keyAuth, err := getKeyAuthorization(chlng.Token, &t.jws.privKey.PublicKey)
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if err != nil {
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return err
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}
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cert, err := t.generateCertificate(keyAuth)
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if err != nil {
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return err
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}
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// Allow for CLI port override
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port := "443"
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if t.port != "" {
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port = t.port
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}
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iface := ""
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if t.iface != "" {
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iface = t.iface
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}
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tlsConf := new(tls.Config)
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tlsConf.Certificates = []tls.Certificate{cert}
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listener, err := tls.Listen("tcp", net.JoinHostPort(iface, port), tlsConf)
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if err != nil {
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return fmt.Errorf("Could not start HTTPS server for challenge -> %v", err)
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}
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defer listener.Close()
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go http.Serve(listener, nil)
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return t.validate(t.jws, domain, chlng.URI, challenge{Resource: "challenge", Type: chlng.Type, Token: chlng.Token, KeyAuthorization: keyAuth})
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}
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func (t *tlsSNIChallenge) generateCertificate(keyAuth string) (tls.Certificate, error) {
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zBytes := sha256.Sum256([]byte(keyAuth))
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z := hex.EncodeToString(zBytes[:sha256.Size])
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// generate a new RSA key for the certificates
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tempPrivKey, err := generatePrivateKey(rsakey, 2048)
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if err != nil {
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return tls.Certificate{}, err
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}
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rsaPrivKey := tempPrivKey.(*rsa.PrivateKey)
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rsaPrivPEM := pemEncode(rsaPrivKey)
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domain := fmt.Sprintf("%s.%s.acme.invalid", z[:32], z[32:])
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tempCertPEM, err := generatePemCert(rsaPrivKey, domain)
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if err != nil {
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return tls.Certificate{}, err
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}
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certificate, err := tls.X509KeyPair(tempCertPEM, rsaPrivPEM)
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if err != nil {
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return tls.Certificate{}, err
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}
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return certificate, nil
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}
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