2017-06-19 11:56:55 +00:00
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// Copyright 2017 Vector Creations Ltd
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package test
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import (
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"crypto/rand"
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"crypto/rsa"
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"crypto/x509"
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"encoding/base64"
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"encoding/pem"
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2022-02-01 16:36:17 +00:00
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"errors"
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2017-06-19 11:56:55 +00:00
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"fmt"
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"math/big"
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"os"
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2020-09-23 10:07:57 +00:00
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"strings"
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2017-06-19 11:56:55 +00:00
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"time"
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)
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const (
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// ServerKeyFile is the name of the file holding the matrix server private key.
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ServerKeyFile = "server_key.pem"
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// TLSCertFile is the name of the file holding the TLS certificate used for federation.
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TLSCertFile = "tls_cert.pem"
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// TLSKeyFile is the name of the file holding the TLS key used for federation.
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TLSKeyFile = "tls_key.pem"
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)
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2017-08-31 11:28:58 +00:00
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// NewMatrixKey generates a new ed25519 matrix server key and writes it to a file.
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2017-09-20 09:59:19 +00:00
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func NewMatrixKey(matrixKeyPath string) (err error) {
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var data [35]byte
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_, err = rand.Read(data[:])
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if err != nil {
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return err
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}
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keyOut, err := os.OpenFile(matrixKeyPath, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0600)
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if err != nil {
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return err
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}
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2017-09-20 09:59:19 +00:00
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defer (func() {
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err = keyOut.Close()
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})()
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2020-09-23 10:07:57 +00:00
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keyID := base64.RawURLEncoding.EncodeToString(data[:])
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keyID = strings.ReplaceAll(keyID, "-", "")
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keyID = strings.ReplaceAll(keyID, "_", "")
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2017-09-20 13:15:38 +00:00
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err = pem.Encode(keyOut, &pem.Block{
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Type: "MATRIX PRIVATE KEY",
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Headers: map[string]string{
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"Key-ID": fmt.Sprintf("ed25519:%s", keyID[:6]),
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},
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Bytes: data[3:],
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})
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return err
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}
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const certificateDuration = time.Hour * 24 * 365 * 10
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2022-02-01 16:36:17 +00:00
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func generateTLSTemplate(dnsNames []string) (*rsa.PrivateKey, *x509.Certificate, error) {
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priv, err := rsa.GenerateKey(rand.Reader, 4096)
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if err != nil {
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return nil, nil, err
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}
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notBefore := time.Now()
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notAfter := notBefore.Add(certificateDuration)
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serialNumberLimit := new(big.Int).Lsh(big.NewInt(1), 128)
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serialNumber, err := rand.Int(rand.Reader, serialNumberLimit)
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if err != nil {
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return nil, nil, err
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}
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template := x509.Certificate{
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SerialNumber: serialNumber,
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NotBefore: notBefore,
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NotAfter: notAfter,
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KeyUsage: x509.KeyUsageKeyEncipherment | x509.KeyUsageDigitalSignature,
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ExtKeyUsage: []x509.ExtKeyUsage{x509.ExtKeyUsageServerAuth},
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BasicConstraintsValid: true,
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DNSNames: dnsNames,
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}
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return priv, &template, nil
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}
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func writeCertificate(tlsCertPath string, derBytes []byte) error {
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certOut, err := os.Create(tlsCertPath)
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if err != nil {
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return err
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}
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defer certOut.Close() // nolint: errcheck
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return pem.Encode(certOut, &pem.Block{Type: "CERTIFICATE", Bytes: derBytes})
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}
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func writePrivateKey(tlsKeyPath string, priv *rsa.PrivateKey) error {
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keyOut, err := os.OpenFile(tlsKeyPath, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0600)
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if err != nil {
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return err
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}
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defer keyOut.Close() // nolint: errcheck
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err = pem.Encode(keyOut, &pem.Block{
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Type: "RSA PRIVATE KEY",
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Bytes: x509.MarshalPKCS1PrivateKey(priv),
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})
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return err
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}
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// NewTLSKey generates a new RSA TLS key and certificate and writes it to a file.
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func NewTLSKey(tlsKeyPath, tlsCertPath string) error {
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priv, template, err := generateTLSTemplate(nil)
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if err != nil {
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return err
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}
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// Self-signed certificate: template == parent
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derBytes, err := x509.CreateCertificate(rand.Reader, template, template, &priv.PublicKey, priv)
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if err != nil {
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return err
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}
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if err = writeCertificate(tlsCertPath, derBytes); err != nil {
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return err
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}
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return writePrivateKey(tlsKeyPath, priv)
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}
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func NewTLSKeyWithAuthority(serverName, tlsKeyPath, tlsCertPath, authorityKeyPath, authorityCertPath string) error {
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priv, template, err := generateTLSTemplate([]string{serverName})
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if err != nil {
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return err
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}
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// load the authority key
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dat, err := os.ReadFile(authorityKeyPath)
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if err != nil {
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return err
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}
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block, _ := pem.Decode([]byte(dat))
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if block == nil || block.Type != "RSA PRIVATE KEY" {
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return errors.New("authority .key is not a valid pem encoded rsa private key")
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}
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authorityPriv, err := x509.ParsePKCS1PrivateKey(block.Bytes)
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if err != nil {
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return err
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}
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// load the authority certificate
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dat, err = os.ReadFile(authorityCertPath)
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if err != nil {
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return err
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}
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block, _ = pem.Decode([]byte(dat))
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if block == nil || block.Type != "CERTIFICATE" {
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return errors.New("authority .crt is not a valid pem encoded x509 cert")
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}
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var caCerts []*x509.Certificate
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caCerts, err = x509.ParseCertificates(block.Bytes)
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if err != nil {
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return err
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}
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if len(caCerts) != 1 {
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return errors.New("authority .crt contains none or more than one cert")
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}
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authorityCert := caCerts[0]
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// Sign the new certificate using the authority's key/cert
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derBytes, err := x509.CreateCertificate(rand.Reader, template, authorityCert, &priv.PublicKey, authorityPriv)
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if err != nil {
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return err
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}
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if err = writeCertificate(tlsCertPath, derBytes); err != nil {
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return err
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}
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return writePrivateKey(tlsKeyPath, priv)
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}
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