mirror of https://github.com/helm/helm
Signed-off-by: xinjiexu <xinjiexu@tencent.com>pull/5048/head
xinjiexu
7 years ago
parent
eaa8cd761f
commit
284164c40c
@ -0,0 +1,65 @@
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/*
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Copyright The Helm 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 aesutil
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import (
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"bytes"
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"crypto/aes"
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"crypto/cipher"
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)
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// Padding ciphertext to multiples of blockSize
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func PKCS7Padding(ciphertext []byte, blockSize int) []byte {
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padding := blockSize - len(ciphertext)%blockSize
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padtext := bytes.Repeat([]byte{byte(padding)}, padding)
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return append(ciphertext, padtext...)
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}
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// UnPadding origData
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func PKCS7UnPadding(origData []byte) []byte {
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length := len(origData)
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unpadding := int(origData[length-1])
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return origData[:(length - unpadding)]
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}
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// AES encrypt orig data with key, and return encrypted data
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func AesEncrypt(origData, key []byte) ([]byte, error) {
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block, err := aes.NewCipher(key)
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if err != nil {
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return nil, err
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}
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blockSize := block.BlockSize()
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origData = PKCS7Padding(origData, blockSize)
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blockMode := cipher.NewCBCEncrypter(block, key[:blockSize])
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crypted := make([]byte, len(origData))
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blockMode.CryptBlocks(crypted, origData)
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return crypted, nil
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}
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// AES decrypt crypted with key, and return orig data
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func AesDecrypt(crypted, key []byte) ([]byte, error) {
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block, err := aes.NewCipher(key)
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if err != nil {
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return nil, err
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}
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blockSize := block.BlockSize()
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blockMode := cipher.NewCBCDecrypter(block, key[:blockSize])
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origData := make([]byte, len(crypted))
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blockMode.CryptBlocks(origData, crypted)
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origData = PKCS7UnPadding(origData)
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return origData, nil
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}
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@ -0,0 +1,112 @@
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/*
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Copyright The Helm 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 chartutil
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import (
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"k8s.io/helm/pkg/aesutil"
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"k8s.io/helm/pkg/proto/hapi/chart"
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)
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const ENCRYPTED_ANNOTATION_KEY = "encrypted"
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// Encrypt Data of templates and values in Chart with cipherKey
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func Encrypt(ch *chart.Chart, cipherKey string) (*chart.Chart, error) {
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cipherBytes := []byte(cipherKey)
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// encrypt templates and values
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ch, err := encryptChart(ch, cipherBytes)
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if err != nil {
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return ch, err
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}
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// encrypt dependencies
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for _, c := range ch.Dependencies {
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_, err := encryptChart(c, cipherBytes)
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if err != nil {
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return ch, err
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}
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}
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return ch, nil
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}
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func encryptChart(ch *chart.Chart, cipherBytes []byte) (*chart.Chart, error) {
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shouldEncrypt := false
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if len(ch.Metadata.Annotations) == 0 {
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shouldEncrypt = true
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} else if v, ok := ch.Metadata.Annotations[ENCRYPTED_ANNOTATION_KEY]; !ok || v != "true" {
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shouldEncrypt = true
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}
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if shouldEncrypt {
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for _, template := range ch.Templates {
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data, err := aesutil.AesEncrypt(template.Data, cipherBytes)
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if err != nil {
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return ch, err
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}
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template.Data = data
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}
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if ch.Values != nil {
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data, err := aesutil.AesEncrypt([]byte(ch.Values.Raw), cipherBytes)
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if err != nil {
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return ch, err
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}
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ch.Values.Raw = string(data)
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}
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if ch.Metadata.Annotations == nil {
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ch.Metadata.Annotations = map[string]string{}
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}
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ch.Metadata.Annotations[ENCRYPTED_ANNOTATION_KEY] = "true"
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}
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return ch, nil
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}
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// Decrypt Data of templates and values in Chart with cipherKey
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func Decrypt(ch *chart.Chart, cipherKey string) (*chart.Chart, error) {
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cipherBytes := []byte(cipherKey)
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// decrypt templates and values
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ch, err := decryptChart(ch, cipherBytes)
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if err != nil {
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return ch, err
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}
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// decrypt dependencies
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for _, c := range ch.Dependencies {
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_, err := decryptChart(c, cipherBytes)
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if err != nil {
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return ch, err
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}
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}
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return ch, nil
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}
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func decryptChart(ch *chart.Chart, cipherBytes []byte) (*chart.Chart, error) {
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if len(ch.Metadata.Annotations) > 0 {
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if v, ok := ch.Metadata.Annotations[ENCRYPTED_ANNOTATION_KEY]; ok && v == "true" {
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for _, template := range ch.Templates {
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data, err := aesutil.AesDecrypt(template.Data, cipherBytes)
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if err != nil {
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return ch, err
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}
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template.Data = data
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}
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if ch.Values != nil {
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data, err := aesutil.AesDecrypt([]byte(ch.Values.Raw), cipherBytes)
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if err != nil {
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return ch, err
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}
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ch.Values.Raw = string(data)
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}
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ch.Metadata.Annotations[ENCRYPTED_ANNOTATION_KEY] = "false"
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}
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}
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return ch, nil
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}
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