diff options
Diffstat (limited to 'certServiceK8sExternalProvider/src/cmpv2provisioner/cmpv2_provisioner.go')
| -rw-r--r-- | certServiceK8sExternalProvider/src/cmpv2provisioner/cmpv2_provisioner.go | 164 |
1 files changed, 164 insertions, 0 deletions
diff --git a/certServiceK8sExternalProvider/src/cmpv2provisioner/cmpv2_provisioner.go b/certServiceK8sExternalProvider/src/cmpv2provisioner/cmpv2_provisioner.go new file mode 100644 index 00000000..a51b8425 --- /dev/null +++ b/certServiceK8sExternalProvider/src/cmpv2provisioner/cmpv2_provisioner.go @@ -0,0 +1,164 @@ +/* + * ============LICENSE_START======================================================= + * oom-certservice-k8s-external-provider + * ================================================================================ + * Copyright (c) 2019 Smallstep Labs, Inc. + * Modifications copyright (C) 2020 Nokia. All rights reserved. + * ================================================================================ + * This source code was copied from the following git repository: + * https://github.com/smallstep/step-issuer + * The source code was modified for usage in the ONAP project. + * ================================================================================ + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * ============LICENSE_END========================================================= + */ + +package cmpv2provisioner + +import ( + "bytes" + "context" + "crypto/x509" + "encoding/base64" + "encoding/pem" + "fmt" + certmanager "github.com/jetstack/cert-manager/pkg/apis/certmanager/v1" + "k8s.io/apimachinery/pkg/types" + "onap.org/oom-certservice/k8s-external-provider/src/cmpv2api" + ctrl "sigs.k8s.io/controller-runtime" + "sync" +) + +var collection = new(sync.Map) + +type CertServiceCA struct { + name string + url string + key []byte +} + +func New(cmpv2Issuer *cmpv2api.CMPv2Issuer, key []byte) (*CertServiceCA, error) { + + ca := CertServiceCA{} + ca.name = cmpv2Issuer.Name + ca.url = cmpv2Issuer.Spec.URL + ca.key = key + + log := ctrl.Log.WithName("cmpv2-provisioner") + log.Info("Configuring CA: ", "name", ca.name, "url", ca.url, "key", ca.key) + + return &ca, nil +} + +func Load(namespacedName types.NamespacedName) (*CertServiceCA, bool) { + provisioner, ok := collection.Load(namespacedName) + if !ok { + return nil, ok + } + certServiceCAprovisioner, ok := provisioner.(*CertServiceCA) + return certServiceCAprovisioner, ok +} + +func Store(namespacedName types.NamespacedName, provisioner *CertServiceCA) { + collection.Store(namespacedName, provisioner) +} + +func (ca *CertServiceCA) Sign(ctx context.Context, certificateRequest *certmanager.CertificateRequest) ([]byte, []byte, error) { + log := ctrl.Log.WithName("certservice-provisioner") + log.Info("Signing certificate: ", "cert-name", certificateRequest.Name) + + key, _ := base64.RawStdEncoding.DecodeString(string(ca.key)) + log.Info("CA: ", "name", ca.name, "url", ca.url, "key", key) + + crPEM := certificateRequest.Spec.Request + csrBase64 := crPEM + log.Info("Csr PEM: ", "bytes", csrBase64) + + csr, err := decodeCSR(crPEM) + if err != nil { + return nil, nil, err + } + + cert := x509.Certificate{} + cert.Raw = csr.Raw + + // TODO + // write here code which will call CertServiceCA and sign CSR + // END + + encodedPEM, err := encodeX509(&cert) + if err != nil { + return nil, nil, err + } + + signedPEM := encodedPEM + trustedCA := encodedPEM + + log.Info("Successfully signed: ", "cert-name", certificateRequest.Name) + log.Info("Signed cert PEM: ", "bytes", signedPEM) + log.Info("Trusted CA PEM: ", "bytes", trustedCA) + + return signedPEM, trustedCA, nil +} + +// TODO JM utility methods - will be used in "real" implementation + +// decodeCSR decodes a certificate request in PEM format and returns the +func decodeCSR(data []byte) (*x509.CertificateRequest, error) { + block, rest := pem.Decode(data) + if block == nil || len(rest) > 0 { + return nil, fmt.Errorf("unexpected CSR PEM on sign request") + } + if block.Type != "CERTIFICATE REQUEST" { + return nil, fmt.Errorf("PEM is not a certificate request") + } + csr, err := x509.ParseCertificateRequest(block.Bytes) + if err != nil { + return nil, fmt.Errorf("error parsing certificate request: %v", err) + } + if err := csr.CheckSignature(); err != nil { + return nil, fmt.Errorf("error checking certificate request signature: %v", err) + } + return csr, nil +} + +// encodeX509 will encode a *x509.Certificate into PEM format. +func encodeX509(cert *x509.Certificate) ([]byte, error) { + caPem := bytes.NewBuffer([]byte{}) + err := pem.Encode(caPem, &pem.Block{Type: "CERTIFICATE", Bytes: cert.Raw}) + if err != nil { + return nil, err + } + return caPem.Bytes(), nil +} + +// generateSubject returns the first SAN that is not 127.0.0.1 or localhost. The +// CSRs generated by the Certificate resource have always those SANs. If no SANs +// are available `certservice-issuer-certificate` will be used as a subject is always +// required. +func generateSubject(sans []string) string { + if len(sans) == 0 { + return "certservice-issuer-certificate" + } + for _, s := range sans { + if s != "127.0.0.1" && s != "localhost" { + return s + } + } + return sans[0] +} + +func decode(cert string) []byte { + bytes, _ := base64.RawStdEncoding.DecodeString(cert) + return bytes +} |