Beispiel #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")
}
Beispiel #2
0
func testLockAgent(agent Agent, t *testing.T) {
	if err := agent.Add(AddedKey{PrivateKey: testPrivateKeys["rsa"], Comment: "comment 1"}); err != nil {
		t.Errorf("Add: %v", err)
	}
	if err := agent.Add(AddedKey{PrivateKey: testPrivateKeys["dsa"], Comment: "comment dsa"}); err != nil {
		t.Errorf("Add: %v", err)
	}
	if keys, err := agent.List(); err != nil {
		t.Errorf("List: %v", err)
	} else if len(keys) != 2 {
		t.Errorf("Want 2 keys, got %v", keys)
	}

	passphrase := []byte("secret")
	if err := agent.Lock(passphrase); err != nil {
		t.Errorf("Lock: %v", err)
	}

	if keys, err := agent.List(); err != nil {
		t.Errorf("List: %v", err)
	} else if len(keys) != 0 {
		t.Errorf("Want 0 keys, got %v", keys)
	}

	signer, _ := ssh.NewSignerFromKey(testPrivateKeys["rsa"])
	if _, err := agent.Sign(signer.PublicKey(), []byte("hello")); err == nil {
		t.Fatalf("Sign did not fail")
	}

	if err := agent.Remove(signer.PublicKey()); err == nil {
		t.Fatalf("Remove did not fail")
	}

	if err := agent.RemoveAll(); err == nil {
		t.Fatalf("RemoveAll did not fail")
	}

	if err := agent.Unlock(nil); err == nil {
		t.Errorf("Unlock with wrong passphrase succeeded")
	}
	if err := agent.Unlock(passphrase); err != nil {
		t.Errorf("Unlock: %v", err)
	}

	if err := agent.Remove(signer.PublicKey()); err != nil {
		t.Fatalf("Remove: %v", err)
	}

	if keys, err := agent.List(); err != nil {
		t.Errorf("List: %v", err)
	} else if len(keys) != 1 {
		t.Errorf("Want 1 keys, got %v", keys)
	}
}
Beispiel #3
0
func testAgentInterface(t *testing.T, agent Agent, key interface{}, cert *ssh.Certificate, lifetimeSecs uint32) {
	signer, err := ssh.NewSignerFromKey(key)
	if err != nil {
		t.Fatalf("NewSignerFromKey(%T): %v", key, err)
	}
	// The agent should start up empty.
	if keys, err := agent.List(); err != nil {
		t.Fatalf("RequestIdentities: %v", err)
	} else if len(keys) > 0 {
		t.Fatalf("got %d keys, want 0: %v", len(keys), keys)
	}

	// Attempt to insert the key, with certificate if specified.
	var pubKey ssh.PublicKey
	if cert != nil {
		err = agent.Add(AddedKey{
			PrivateKey:   key,
			Certificate:  cert,
			Comment:      "comment",
			LifetimeSecs: lifetimeSecs,
		})
		pubKey = cert
	} else {
		err = agent.Add(AddedKey{PrivateKey: key, Comment: "comment", LifetimeSecs: lifetimeSecs})
		pubKey = signer.PublicKey()
	}
	if err != nil {
		t.Fatalf("insert(%T): %v", key, err)
	}

	// Did the key get inserted successfully?
	if keys, err := agent.List(); err != nil {
		t.Fatalf("List: %v", err)
	} else if len(keys) != 1 {
		t.Fatalf("got %v, want 1 key", keys)
	} else if keys[0].Comment != "comment" {
		t.Fatalf("key comment: got %v, want %v", keys[0].Comment, "comment")
	} else if !bytes.Equal(keys[0].Blob, pubKey.Marshal()) {
		t.Fatalf("key mismatch")
	}

	// Can the agent make a valid signature?
	data := []byte("hello")
	sig, err := agent.Sign(pubKey, data)
	if err != nil {
		t.Fatalf("Sign(%s): %v", pubKey.Type(), err)
	}

	if err := pubKey.Verify(data, sig); err != nil {
		t.Fatalf("Verify(%s): %v", pubKey.Type(), err)
	}
}
func init() {
	var err error

	n := len(testdata.PEMBytes)
	testPrivateKeys = make(map[string]interface{}, n)
	testSigners = make(map[string]ssh.Signer, n)
	testPublicKeys = make(map[string]ssh.PublicKey, n)
	for t, k := range testdata.PEMBytes {
		testPrivateKeys[t], err = ssh.ParseRawPrivateKey(k)
		if err != nil {
			panic(fmt.Sprintf("Unable to parse test key %s: %v", t, err))
		}
		testSigners[t], err = ssh.NewSignerFromKey(testPrivateKeys[t])
		if err != nil {
			panic(fmt.Sprintf("Unable to create signer for test key %s: %v", t, err))
		}
		testPublicKeys[t] = testSigners[t].PublicKey()
	}

	// Create a cert and sign it for use in tests.
	testCert := &ssh.Certificate{
		Nonce:           []byte{},                       // To pass reflect.DeepEqual after marshal & parse, this must be non-nil
		ValidPrincipals: []string{"gopher1", "gopher2"}, // increases test coverage
		ValidAfter:      0,                              // unix epoch
		ValidBefore:     ssh.CertTimeInfinity,           // The end of currently representable time.
		Reserved:        []byte{},                       // To pass reflect.DeepEqual after marshal & parse, this must be non-nil
		Key:             testPublicKeys["ecdsa"],
		SignatureKey:    testPublicKeys["rsa"],
		Permissions: ssh.Permissions{
			CriticalOptions: map[string]string{},
			Extensions:      map[string]string{},
		},
	}
	testCert.SignCert(rand.Reader, testSigners["rsa"])
	testPrivateKeys["cert"] = testPrivateKeys["ecdsa"]
	testSigners["cert"], err = ssh.NewCertSigner(testCert, testSigners["ecdsa"])
	if err != nil {
		panic(fmt.Sprintf("Unable to create certificate signer: %v", err))
	}
}
Beispiel #5
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
}