92 lines
2.3 KiB
Go
92 lines
2.3 KiB
Go
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// Copyright 2019 Drone IO, Inc.
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//
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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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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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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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package encrypt
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import (
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"crypto/aes"
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"crypto/cipher"
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"crypto/rand"
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"encoding/base64"
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"encoding/json"
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"io"
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"net/http"
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"github.com/drone/drone-go/drone"
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"github.com/drone/drone/core"
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"github.com/drone/drone/handler/api/render"
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"github.com/go-chi/chi"
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)
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type respEncrypted struct {
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Data string `json:"data"`
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}
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// Handler returns an http.HandlerFunc that processes http
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// requests to create an encrypted secret.
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func Handler(repos core.RepositoryStore) http.HandlerFunc {
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return func(w http.ResponseWriter, r *http.Request) {
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namespace := chi.URLParam(r, "owner")
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name := chi.URLParam(r, "name")
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repo, err := repos.FindName(r.Context(), namespace, name)
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if err != nil {
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render.NotFound(w, err)
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return
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}
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in := new(drone.Secret)
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err = json.NewDecoder(r.Body).Decode(in)
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if err != nil {
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render.BadRequest(w, err)
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return
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}
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// the secret is encrypted with a per-repository 256-bit
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// key. If the key is missing or malformed we should
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// return an error to the client.
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encrypted, err := encrypt([]byte(in.Data), []byte(repo.Secret))
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if err != nil {
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render.InternalError(w, err)
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return
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}
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// the encrypted secret is embedded in the yaml
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// configuration file and is json-encoded for
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// inclusion as a !binary attribute.
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encoded := base64.URLEncoding.EncodeToString(encrypted)
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render.JSON(w, &respEncrypted{Data: encoded}, 200)
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}
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}
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func encrypt(plaintext, key []byte) (ciphertext []byte, err 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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gcm, err := cipher.NewGCM(block)
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if err != nil {
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return nil, err
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}
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nonce := make([]byte, gcm.NonceSize())
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_, err = io.ReadFull(rand.Reader, nonce)
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if err != nil {
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return nil, err
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}
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return gcm.Seal(nonce, nonce, plaintext, nil), nil
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}
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