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c97292b255
* Allow usage of root CA without a key. Fixes #6290 * Update modules/caddypki/crypto.go --------- Co-authored-by: Matt Holt <mholt@users.noreply.github.com>
104 lines
2.8 KiB
Go
104 lines
2.8 KiB
Go
// Copyright 2015 Matthew Holt and The Caddy Authors
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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 caddypki
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import (
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"bytes"
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"crypto"
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"crypto/x509"
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"encoding/pem"
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"fmt"
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"os"
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"github.com/caddyserver/certmagic"
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)
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func pemDecodeSingleCert(pemDER []byte) (*x509.Certificate, error) {
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pemBlock, remaining := pem.Decode(pemDER)
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if pemBlock == nil {
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return nil, fmt.Errorf("no PEM block found")
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}
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if len(remaining) > 0 {
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return nil, fmt.Errorf("input contained more than a single PEM block")
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}
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if pemBlock.Type != "CERTIFICATE" {
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return nil, fmt.Errorf("expected PEM block type to be CERTIFICATE, but got '%s'", pemBlock.Type)
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}
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return x509.ParseCertificate(pemBlock.Bytes)
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}
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func pemEncodeCert(der []byte) ([]byte, error) {
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return pemEncode("CERTIFICATE", der)
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}
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func pemEncode(blockType string, b []byte) ([]byte, error) {
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var buf bytes.Buffer
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err := pem.Encode(&buf, &pem.Block{Type: blockType, Bytes: b})
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return buf.Bytes(), err
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}
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func trusted(cert *x509.Certificate) bool {
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chains, err := cert.Verify(x509.VerifyOptions{})
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return len(chains) > 0 && err == nil
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}
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// KeyPair represents a public-private key pair, where the
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// public key is also called a certificate.
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type KeyPair struct {
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// The certificate. By default, this should be the path to
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// a PEM file unless format is something else.
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Certificate string `json:"certificate,omitempty"`
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// The private key. By default, this should be the path to
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// a PEM file unless format is something else.
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PrivateKey string `json:"private_key,omitempty"`
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// The format in which the certificate and private
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// key are provided. Default: pem_file
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Format string `json:"format,omitempty"`
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}
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// Load loads the certificate and key.
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func (kp KeyPair) Load() (*x509.Certificate, crypto.Signer, error) {
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switch kp.Format {
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case "", "pem_file":
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certData, err := os.ReadFile(kp.Certificate)
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if err != nil {
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return nil, nil, err
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}
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cert, err := pemDecodeSingleCert(certData)
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if err != nil {
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return nil, nil, err
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}
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var key crypto.Signer
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if kp.PrivateKey != "" {
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keyData, err := os.ReadFile(kp.PrivateKey)
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if err != nil {
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return nil, nil, err
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}
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key, err = certmagic.PEMDecodePrivateKey(keyData)
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if err != nil {
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return nil, nil, err
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}
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}
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return cert, key, nil
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default:
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return nil, nil, fmt.Errorf("unsupported format: %s", kp.Format)
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}
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}
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