mirror of https://github.com/pulumi/pulumi.git
119 lines
3.1 KiB
Go
119 lines
3.1 KiB
Go
// Copyright 2016-2023, Pulumi Corporation.
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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 workspace
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import (
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"archive/zip"
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"bytes"
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"fmt"
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"io"
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"net/http"
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"net/url"
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"os"
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"path/filepath"
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"strings"
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)
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// Sanitize archive file pathing from "G305: Zip Slip vulnerability"
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func sanitizeArchivePath(d, t string) (v string, err error) {
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v = filepath.Join(d, t)
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if strings.HasPrefix(v, filepath.Clean(d)) {
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return v, nil
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}
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return "", fmt.Errorf("%s: %s", "content filepath is tainted", t)
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}
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func isZIPTemplateURL(templateNamePathOrURL string) bool {
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parsedURL, err := url.Parse(templateNamePathOrURL)
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if err != nil {
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return false
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}
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return parsedURL.Path != "" && strings.HasSuffix(parsedURL.Path, ".zip")
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}
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func retrieveZIPTemplates(templateURL string) (TemplateRepository, error) {
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var err error
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// Create a temp dir.
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var temp string
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if temp, err = os.MkdirTemp("", "pulumi-template-"); err != nil {
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return TemplateRepository{}, err
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}
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parsedURL, err := url.Parse(templateURL)
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if err != nil {
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return TemplateRepository{}, err
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}
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var fullPath string
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if fullPath, err = RetrieveZIPTemplateFolder(parsedURL, temp); err != nil {
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return TemplateRepository{}, fmt.Errorf("failed to retrieve zip archive: %w", err)
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}
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return TemplateRepository{
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Root: temp,
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SubDirectory: fullPath,
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ShouldDelete: true,
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}, nil
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}
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func RetrieveZIPTemplateFolder(templateURL *url.URL, tempDir string) (string, error) {
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packageRequest, err := http.NewRequest(http.MethodGet, templateURL.String(), bytes.NewReader([]byte{}))
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if err != nil {
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return "", err
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}
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packageRequest.Header.Set("Accept", "application/zip")
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packageResponse, err := http.DefaultClient.Do(packageRequest)
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if err != nil {
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return "", err
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}
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packageResponseBody, err := io.ReadAll(packageResponse.Body)
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if err != nil {
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return "", err
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}
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archive, err := zip.NewReader(bytes.NewReader(packageResponseBody), int64(len(packageResponseBody)))
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if err != nil {
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return "", err
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}
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for _, file := range archive.File {
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filePath, err := sanitizeArchivePath(tempDir, file.Name)
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if err != nil {
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return "", err
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}
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if file.FileHeader.FileInfo().IsDir() {
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err = os.MkdirAll(filePath, 0o777)
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if err != nil {
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return "", err
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}
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} else {
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fileReader, err := file.Open()
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if err != nil {
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return "", err
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}
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defer fileReader.Close()
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destinationFile, err := os.Create(filePath)
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if err != nil {
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return "", err
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}
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defer destinationFile.Close()
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_, err = io.Copy(destinationFile, fileReader) // #nosec G110
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if err != nil {
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return "", err
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}
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}
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}
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return tempDir, nil
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}
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