797d29bcf3
This work made possible by Tailscale: https://tailscale.com - thank you to the Tailscale team! * Implement custom GetCertificate callback Useful if another entity is managing certificates and can provide its own dynamically during handshakes. * Refactor CustomGetCertificate into OnDemandConfig * Set certs to managed=true This is only sorta true, but it allows handshake-time maintenance of the certificates that are cached from CustomGetCertificate. Our background maintenance routine skips certs that are OnDemand so it should be fine. * Change CustomGetCertificate into interface value Instead of a function * Case-insensitive subject name comparison Hostnames are case-insensitive Also add context to GetCertificate * Export a couple of outrageously useful functions * Allow multiple custom certificate getters Also minor refactoring and enhancements * Fix tests * Rename Getter -> Manager; refactor And don't cache externally managed certs * Minor updates to comments
101 lines
2.6 KiB
Go
101 lines
2.6 KiB
Go
// Copyright 2015 Matthew Holt
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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 certmagic
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import (
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"bytes"
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"crypto"
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"crypto/ecdsa"
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"crypto/ed25519"
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"crypto/elliptic"
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"crypto/rand"
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"crypto/rsa"
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"crypto/x509"
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"testing"
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)
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func TestEncodeDecodeRSAPrivateKey(t *testing.T) {
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privateKey, err := rsa.GenerateKey(rand.Reader, 128) // make tests faster; small key size OK for testing
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if err != nil {
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t.Fatal(err)
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}
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// test save
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savedBytes, err := PEMEncodePrivateKey(privateKey)
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if err != nil {
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t.Fatal("error saving private key:", err)
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}
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// test load
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loadedKey, err := PEMDecodePrivateKey(savedBytes)
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if err != nil {
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t.Error("error loading private key:", err)
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}
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// test load (should fail)
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_, err = PEMDecodePrivateKey(savedBytes[2:])
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if err == nil {
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t.Error("loading private key should have failed")
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}
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// verify loaded key is correct
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if !privateKeysSame(privateKey, loadedKey) {
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t.Error("Expected key bytes to be the same, but they weren't")
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}
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}
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func TestSaveAndLoadECCPrivateKey(t *testing.T) {
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privateKey, err := ecdsa.GenerateKey(elliptic.P384(), rand.Reader)
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if err != nil {
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t.Fatal(err)
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}
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// test save
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savedBytes, err := PEMEncodePrivateKey(privateKey)
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if err != nil {
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t.Fatal("error saving private key:", err)
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}
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// test load
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loadedKey, err := PEMDecodePrivateKey(savedBytes)
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if err != nil {
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t.Error("error loading private key:", err)
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}
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// verify loaded key is correct
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if !privateKeysSame(privateKey, loadedKey) {
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t.Error("Expected key bytes to be the same, but they weren't")
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}
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}
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// privateKeysSame compares the bytes of a and b and returns true if they are the same.
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func privateKeysSame(a, b crypto.PrivateKey) bool {
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return bytes.Equal(privateKeyBytes(a), privateKeyBytes(b))
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}
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// privateKeyBytes returns the bytes of DER-encoded key.
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func privateKeyBytes(key crypto.PrivateKey) []byte {
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var keyBytes []byte
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switch key := key.(type) {
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case *rsa.PrivateKey:
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keyBytes = x509.MarshalPKCS1PrivateKey(key)
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case *ecdsa.PrivateKey:
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keyBytes, _ = x509.MarshalECPrivateKey(key)
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case ed25519.PrivateKey:
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return key
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}
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return keyBytes
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}
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