Import of https://github.com/ciena/voltctl at commit 40d61fbf3f910ed4017cf67c9c79e8e1f82a33a5
Change-Id: I8464c59e60d76cb8612891db3303878975b5416c
diff --git a/vendor/k8s.io/client-go/util/keyutil/key.go b/vendor/k8s.io/client-go/util/keyutil/key.go
new file mode 100644
index 0000000..83c2c62
--- /dev/null
+++ b/vendor/k8s.io/client-go/util/keyutil/key.go
@@ -0,0 +1,323 @@
+/*
+Copyright 2018 The Kubernetes Authors.
+
+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.
+*/
+
+// Package keyutil contains utilities for managing public/private key pairs.
+package keyutil
+
+import (
+ "crypto"
+ "crypto/ecdsa"
+ "crypto/elliptic"
+ cryptorand "crypto/rand"
+ "crypto/rsa"
+ "crypto/x509"
+ "encoding/pem"
+ "fmt"
+ "io/ioutil"
+ "os"
+ "path/filepath"
+)
+
+const (
+ // ECPrivateKeyBlockType is a possible value for pem.Block.Type.
+ ECPrivateKeyBlockType = "EC PRIVATE KEY"
+ // RSAPrivateKeyBlockType is a possible value for pem.Block.Type.
+ RSAPrivateKeyBlockType = "RSA PRIVATE KEY"
+ // PrivateKeyBlockType is a possible value for pem.Block.Type.
+ PrivateKeyBlockType = "PRIVATE KEY"
+ // PublicKeyBlockType is a possible value for pem.Block.Type.
+ PublicKeyBlockType = "PUBLIC KEY"
+)
+
+// MakeEllipticPrivateKeyPEM creates an ECDSA private key
+func MakeEllipticPrivateKeyPEM() ([]byte, error) {
+ privateKey, err := ecdsa.GenerateKey(elliptic.P256(), cryptorand.Reader)
+ if err != nil {
+ return nil, err
+ }
+
+ derBytes, err := x509.MarshalECPrivateKey(privateKey)
+ if err != nil {
+ return nil, err
+ }
+
+ privateKeyPemBlock := &pem.Block{
+ Type: ECPrivateKeyBlockType,
+ Bytes: derBytes,
+ }
+ return pem.EncodeToMemory(privateKeyPemBlock), nil
+}
+
+// WriteKey writes the pem-encoded key data to keyPath.
+// The key file will be created with file mode 0600.
+// If the key file already exists, it will be overwritten.
+// The parent directory of the keyPath will be created as needed with file mode 0755.
+func WriteKey(keyPath string, data []byte) error {
+ if err := os.MkdirAll(filepath.Dir(keyPath), os.FileMode(0755)); err != nil {
+ return err
+ }
+ return ioutil.WriteFile(keyPath, data, os.FileMode(0600))
+}
+
+// LoadOrGenerateKeyFile looks for a key in the file at the given path. If it
+// can't find one, it will generate a new key and store it there.
+func LoadOrGenerateKeyFile(keyPath string) (data []byte, wasGenerated bool, err error) {
+ loadedData, err := ioutil.ReadFile(keyPath)
+ // Call verifyKeyData to ensure the file wasn't empty/corrupt.
+ if err == nil && verifyKeyData(loadedData) {
+ return loadedData, false, err
+ }
+ if !os.IsNotExist(err) {
+ return nil, false, fmt.Errorf("error loading key from %s: %v", keyPath, err)
+ }
+
+ generatedData, err := MakeEllipticPrivateKeyPEM()
+ if err != nil {
+ return nil, false, fmt.Errorf("error generating key: %v", err)
+ }
+ if err := WriteKey(keyPath, generatedData); err != nil {
+ return nil, false, fmt.Errorf("error writing key to %s: %v", keyPath, err)
+ }
+ return generatedData, true, nil
+}
+
+// MarshalPrivateKeyToPEM converts a known private key type of RSA or ECDSA to
+// a PEM encoded block or returns an error.
+func MarshalPrivateKeyToPEM(privateKey crypto.PrivateKey) ([]byte, error) {
+ switch t := privateKey.(type) {
+ case *ecdsa.PrivateKey:
+ derBytes, err := x509.MarshalECPrivateKey(t)
+ if err != nil {
+ return nil, err
+ }
+ block := &pem.Block{
+ Type: ECPrivateKeyBlockType,
+ Bytes: derBytes,
+ }
+ return pem.EncodeToMemory(block), nil
+ case *rsa.PrivateKey:
+ block := &pem.Block{
+ Type: RSAPrivateKeyBlockType,
+ Bytes: x509.MarshalPKCS1PrivateKey(t),
+ }
+ return pem.EncodeToMemory(block), nil
+ default:
+ return nil, fmt.Errorf("private key is not a recognized type: %T", privateKey)
+ }
+}
+
+// PrivateKeyFromFile returns the private key in rsa.PrivateKey or ecdsa.PrivateKey format from a given PEM-encoded file.
+// Returns an error if the file could not be read or if the private key could not be parsed.
+func PrivateKeyFromFile(file string) (interface{}, error) {
+ data, err := ioutil.ReadFile(file)
+ if err != nil {
+ return nil, err
+ }
+ key, err := ParsePrivateKeyPEM(data)
+ if err != nil {
+ return nil, fmt.Errorf("error reading private key file %s: %v", file, err)
+ }
+ return key, nil
+}
+
+// PublicKeysFromFile returns the public keys in rsa.PublicKey or ecdsa.PublicKey format from a given PEM-encoded file.
+// Reads public keys from both public and private key files.
+func PublicKeysFromFile(file string) ([]interface{}, error) {
+ data, err := ioutil.ReadFile(file)
+ if err != nil {
+ return nil, err
+ }
+ keys, err := ParsePublicKeysPEM(data)
+ if err != nil {
+ return nil, fmt.Errorf("error reading public key file %s: %v", file, err)
+ }
+ return keys, nil
+}
+
+// verifyKeyData returns true if the provided data appears to be a valid private key.
+func verifyKeyData(data []byte) bool {
+ if len(data) == 0 {
+ return false
+ }
+ _, err := ParsePrivateKeyPEM(data)
+ return err == nil
+}
+
+// ParsePrivateKeyPEM returns a private key parsed from a PEM block in the supplied data.
+// Recognizes PEM blocks for "EC PRIVATE KEY", "RSA PRIVATE KEY", or "PRIVATE KEY"
+func ParsePrivateKeyPEM(keyData []byte) (interface{}, error) {
+ var privateKeyPemBlock *pem.Block
+ for {
+ privateKeyPemBlock, keyData = pem.Decode(keyData)
+ if privateKeyPemBlock == nil {
+ break
+ }
+
+ switch privateKeyPemBlock.Type {
+ case ECPrivateKeyBlockType:
+ // ECDSA Private Key in ASN.1 format
+ if key, err := x509.ParseECPrivateKey(privateKeyPemBlock.Bytes); err == nil {
+ return key, nil
+ }
+ case RSAPrivateKeyBlockType:
+ // RSA Private Key in PKCS#1 format
+ if key, err := x509.ParsePKCS1PrivateKey(privateKeyPemBlock.Bytes); err == nil {
+ return key, nil
+ }
+ case PrivateKeyBlockType:
+ // RSA or ECDSA Private Key in unencrypted PKCS#8 format
+ if key, err := x509.ParsePKCS8PrivateKey(privateKeyPemBlock.Bytes); err == nil {
+ return key, nil
+ }
+ }
+
+ // tolerate non-key PEM blocks for compatibility with things like "EC PARAMETERS" blocks
+ // originally, only the first PEM block was parsed and expected to be a key block
+ }
+
+ // we read all the PEM blocks and didn't recognize one
+ return nil, fmt.Errorf("data does not contain a valid RSA or ECDSA private key")
+}
+
+// ParsePublicKeysPEM is a helper function for reading an array of rsa.PublicKey or ecdsa.PublicKey from a PEM-encoded byte array.
+// Reads public keys from both public and private key files.
+func ParsePublicKeysPEM(keyData []byte) ([]interface{}, error) {
+ var block *pem.Block
+ keys := []interface{}{}
+ for {
+ // read the next block
+ block, keyData = pem.Decode(keyData)
+ if block == nil {
+ break
+ }
+
+ // test block against parsing functions
+ if privateKey, err := parseRSAPrivateKey(block.Bytes); err == nil {
+ keys = append(keys, &privateKey.PublicKey)
+ continue
+ }
+ if publicKey, err := parseRSAPublicKey(block.Bytes); err == nil {
+ keys = append(keys, publicKey)
+ continue
+ }
+ if privateKey, err := parseECPrivateKey(block.Bytes); err == nil {
+ keys = append(keys, &privateKey.PublicKey)
+ continue
+ }
+ if publicKey, err := parseECPublicKey(block.Bytes); err == nil {
+ keys = append(keys, publicKey)
+ continue
+ }
+
+ // tolerate non-key PEM blocks for backwards compatibility
+ // originally, only the first PEM block was parsed and expected to be a key block
+ }
+
+ if len(keys) == 0 {
+ return nil, fmt.Errorf("data does not contain any valid RSA or ECDSA public keys")
+ }
+ return keys, nil
+}
+
+// parseRSAPublicKey parses a single RSA public key from the provided data
+func parseRSAPublicKey(data []byte) (*rsa.PublicKey, error) {
+ var err error
+
+ // Parse the key
+ var parsedKey interface{}
+ if parsedKey, err = x509.ParsePKIXPublicKey(data); err != nil {
+ if cert, err := x509.ParseCertificate(data); err == nil {
+ parsedKey = cert.PublicKey
+ } else {
+ return nil, err
+ }
+ }
+
+ // Test if parsed key is an RSA Public Key
+ var pubKey *rsa.PublicKey
+ var ok bool
+ if pubKey, ok = parsedKey.(*rsa.PublicKey); !ok {
+ return nil, fmt.Errorf("data doesn't contain valid RSA Public Key")
+ }
+
+ return pubKey, nil
+}
+
+// parseRSAPrivateKey parses a single RSA private key from the provided data
+func parseRSAPrivateKey(data []byte) (*rsa.PrivateKey, error) {
+ var err error
+
+ // Parse the key
+ var parsedKey interface{}
+ if parsedKey, err = x509.ParsePKCS1PrivateKey(data); err != nil {
+ if parsedKey, err = x509.ParsePKCS8PrivateKey(data); err != nil {
+ return nil, err
+ }
+ }
+
+ // Test if parsed key is an RSA Private Key
+ var privKey *rsa.PrivateKey
+ var ok bool
+ if privKey, ok = parsedKey.(*rsa.PrivateKey); !ok {
+ return nil, fmt.Errorf("data doesn't contain valid RSA Private Key")
+ }
+
+ return privKey, nil
+}
+
+// parseECPublicKey parses a single ECDSA public key from the provided data
+func parseECPublicKey(data []byte) (*ecdsa.PublicKey, error) {
+ var err error
+
+ // Parse the key
+ var parsedKey interface{}
+ if parsedKey, err = x509.ParsePKIXPublicKey(data); err != nil {
+ if cert, err := x509.ParseCertificate(data); err == nil {
+ parsedKey = cert.PublicKey
+ } else {
+ return nil, err
+ }
+ }
+
+ // Test if parsed key is an ECDSA Public Key
+ var pubKey *ecdsa.PublicKey
+ var ok bool
+ if pubKey, ok = parsedKey.(*ecdsa.PublicKey); !ok {
+ return nil, fmt.Errorf("data doesn't contain valid ECDSA Public Key")
+ }
+
+ return pubKey, nil
+}
+
+// parseECPrivateKey parses a single ECDSA private key from the provided data
+func parseECPrivateKey(data []byte) (*ecdsa.PrivateKey, error) {
+ var err error
+
+ // Parse the key
+ var parsedKey interface{}
+ if parsedKey, err = x509.ParseECPrivateKey(data); err != nil {
+ return nil, err
+ }
+
+ // Test if parsed key is an ECDSA Private Key
+ var privKey *ecdsa.PrivateKey
+ var ok bool
+ if privKey, ok = parsedKey.(*ecdsa.PrivateKey); !ok {
+ return nil, fmt.Errorf("data doesn't contain valid ECDSA Private Key")
+ }
+
+ return privKey, nil
+}