Ejemplo n.º 1
0
func (c *client) insertCert(s interface{}, cert *ssh.Certificate, comment string, constraints []byte) error {
	var req []byte
	switch k := s.(type) {
	case *rsa.PrivateKey:
		if len(k.Primes) != 2 {
			return fmt.Errorf("agent: unsupported RSA key with %d primes", len(k.Primes))
		}
		k.Precompute()
		req = ssh.Marshal(rsaCertMsg{
			Type:        cert.Type(),
			CertBytes:   cert.Marshal(),
			D:           k.D,
			Iqmp:        k.Precomputed.Qinv,
			P:           k.Primes[0],
			Q:           k.Primes[1],
			Comments:    comment,
			Constraints: constraints,
		})
	case *dsa.PrivateKey:
		req = ssh.Marshal(dsaCertMsg{
			Type:      cert.Type(),
			CertBytes: cert.Marshal(),
			X:         k.X,
			Comments:  comment,
		})
	case *ecdsa.PrivateKey:
		req = ssh.Marshal(ecdsaCertMsg{
			Type:      cert.Type(),
			CertBytes: cert.Marshal(),
			D:         k.D,
			Comments:  comment,
		})
	default:
		return fmt.Errorf("agent: unsupported key type %T", s)
	}

	// if constraints are present then the message type needs to be changed.
	if len(constraints) != 0 {
		req[0] = agentAddIdConstrained
	}

	signer, err := ssh.NewSignerFromKey(s)
	if err != nil {
		return err
	}
	if bytes.Compare(cert.Key.Marshal(), signer.PublicKey().Marshal()) != 0 {
		return errors.New("agent: signer and cert have different public key")
	}

	resp, err := c.call(req)
	if err != nil {
		return err
	}
	if _, ok := resp.(*successAgentMsg); ok {
		return nil
	}
	return errors.New("agent: failure")
}
Ejemplo n.º 2
0
// Insert adds a private key to the keyring. If a certificate
// is given, that certificate is added as public key. Note that
// any constraints given are ignored.
func (r *keyring) Add(key AddedKey) error {
	r.mu.Lock()
	defer r.mu.Unlock()
	if r.locked {
		return errLocked
	}
	signer, err := ssh.NewSignerFromKey(key.PrivateKey)

	if err != nil {
		return err
	}

	if cert := key.Certificate; cert != nil {
		signer, err = ssh.NewCertSigner(cert, signer)
		if err != nil {
			return err
		}
	}

	r.keys = append(r.keys, privKey{signer, key.Comment})

	return nil
}