4fa6d9775c
Allow a user to provide an entire certificate chain to the ca issuer. Include that chain in all generated certificates Signed-off-by: Mike Bryant <m@ocado.com>
118 lines
3.3 KiB
Go
118 lines
3.3 KiB
Go
/*
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Copyright 2019 The Jetstack cert-manager contributors.
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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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http://www.apache.org/licenses/LICENSE-2.0
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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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*/
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package pki
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import (
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"crypto"
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"crypto/rsa"
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"crypto/x509"
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"encoding/pem"
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"github.com/jetstack/cert-manager/pkg/util/errors"
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)
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// DecodePrivateKeyBytes will decode a PEM encoded private key into a crypto.Signer.
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// It supports ECDSA and RSA private keys only. All other types will return err.
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func DecodePrivateKeyBytes(keyBytes []byte) (crypto.Signer, error) {
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// decode the private key pem
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block, _ := pem.Decode(keyBytes)
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if block == nil {
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return nil, errors.NewInvalidData("error decoding private key PEM block")
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}
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switch block.Type {
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case "EC PRIVATE KEY":
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key, err := x509.ParseECPrivateKey(block.Bytes)
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if err != nil {
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return nil, errors.NewInvalidData("error parsing ecdsa private key: %s", err.Error())
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}
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return key, nil
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case "RSA PRIVATE KEY":
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key, err := x509.ParsePKCS1PrivateKey(block.Bytes)
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if err != nil {
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return nil, errors.NewInvalidData("error parsing rsa private key: %s", err.Error())
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}
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err = key.Validate()
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if err != nil {
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return nil, errors.NewInvalidData("rsa private key failed validation: %s", err.Error())
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}
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return key, nil
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default:
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return nil, errors.NewInvalidData("unknown private key type: %s", block.Type)
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}
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}
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// DecodePKCS1PrivateKeyBytes will decode a PEM encoded RSA private key.
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func DecodePKCS1PrivateKeyBytes(keyBytes []byte) (*rsa.PrivateKey, error) {
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// decode the private key pem
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block, _ := pem.Decode(keyBytes)
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if block == nil {
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return nil, errors.NewInvalidData("error decoding private key PEM block")
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}
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// parse the private key
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key, err := x509.ParsePKCS1PrivateKey(block.Bytes)
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if err != nil {
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return nil, errors.NewInvalidData("error parsing private key: %s", err.Error())
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}
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// validate the private key
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if err = key.Validate(); err != nil {
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return nil, errors.NewInvalidData("private key failed validation: %s", err.Error())
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}
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return key, nil
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}
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// DecodeX509CertificateChainBytes will decode a PEM encoded x509 Certificate chain.
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func DecodeX509CertificateChainBytes(certBytes []byte) ([]*x509.Certificate, error) {
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certs := []*x509.Certificate{}
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var block *pem.Block
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for {
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// decode the tls certificate pem
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block, certBytes = pem.Decode(certBytes)
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if block == nil {
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break
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}
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// parse the tls certificate
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cert, err := x509.ParseCertificate(block.Bytes)
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if err != nil {
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return nil, errors.NewInvalidData("error parsing TLS certificate: %s", err.Error())
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}
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certs = append(certs, cert)
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}
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if len(certs) == 0 {
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return nil, errors.NewInvalidData("error decoding cert PEM block")
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}
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return certs, nil
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}
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// DecodeX509CertificateBytes will decode a PEM encoded x509 Certificate.
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func DecodeX509CertificateBytes(certBytes []byte) (*x509.Certificate, error) {
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certs, err := DecodeX509CertificateChainBytes(certBytes)
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if err != nil {
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return nil, err
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}
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return certs[0], nil
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}
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