99 lines
2.3 KiB
Go
99 lines
2.3 KiB
Go
/*
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Copyright 2016 The Kubernetes Authors.
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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 certificates
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import (
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"crypto"
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"crypto/x509"
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"fmt"
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"io/ioutil"
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"os"
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certificates "k8s.io/kubernetes/pkg/apis/certificates/v1alpha1"
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"github.com/cloudflare/cfssl/config"
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"github.com/cloudflare/cfssl/helpers"
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"github.com/cloudflare/cfssl/signer"
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"github.com/cloudflare/cfssl/signer/local"
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)
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var onlySigningPolicy = &config.Signing{
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Default: &config.SigningProfile{
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Usage: []string{"signing"},
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Expiry: helpers.OneYear,
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ExpiryString: "8760h",
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},
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}
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type CFSSLSigner struct {
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ca *x509.Certificate
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priv crypto.Signer
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sigAlgo x509.SignatureAlgorithm
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}
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func NewCFSSLSigner(caFile, caKeyFile string) (*CFSSLSigner, error) {
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ca, err := ioutil.ReadFile(caFile)
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if err != nil {
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return nil, err
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}
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cakey, err := ioutil.ReadFile(caKeyFile)
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if err != nil {
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return nil, err
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}
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parsedCa, err := helpers.ParseCertificatePEM(ca)
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if err != nil {
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return nil, err
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}
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strPassword := os.Getenv("CFSSL_CA_PK_PASSWORD")
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password := []byte(strPassword)
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if strPassword == "" {
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password = nil
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}
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priv, err := helpers.ParsePrivateKeyPEMWithPassword(cakey, password)
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if err != nil {
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return nil, fmt.Errorf("Malformed private key %v", err)
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}
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return &CFSSLSigner{
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priv: priv,
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ca: parsedCa,
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sigAlgo: signer.DefaultSigAlgo(priv),
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}, nil
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}
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func (cs *CFSSLSigner) Sign(csr *certificates.CertificateSigningRequest) ([]byte, error) {
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var usages []string
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for _, usage := range csr.Spec.Usages {
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usages = append(usages, string(usage))
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}
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policy := &config.Signing{
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Default: &config.SigningProfile{
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Usage: usages,
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Expiry: helpers.OneYear,
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ExpiryString: "8760h",
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},
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}
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s, err := local.NewSigner(cs.priv, cs.ca, cs.sigAlgo, policy)
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if err != nil {
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return nil, err
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}
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return s.Sign(signer.SignRequest{
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Request: string(csr.Spec.Request),
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})
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}
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