forked from TrueCloudLab/restic
88 lines
2.8 KiB
Go
88 lines
2.8 KiB
Go
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// +build ignore
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/*
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* Minio Go Library for Amazon S3 Compatible Cloud Storage (C) 2017 Minio, 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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*/
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package main
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import (
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"bytes"
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"crypto/md5"
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"encoding/base64"
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"io/ioutil"
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"log"
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"net/http"
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minio "github.com/minio/minio-go"
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)
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func main() {
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// Note: YOUR-ACCESSKEYID, YOUR-SECRETACCESSKEY, my-testfile, my-bucketname and
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// my-objectname are dummy values, please replace them with original values.
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// New returns an Amazon S3 compatible client object. API compatibility (v2 or v4) is automatically
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// determined based on the Endpoint value.
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minioClient, err := minio.New("s3.amazonaws.com", "YOUR-ACCESSKEYID", "YOUR-SECRETACCESSKEY", true)
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if err != nil {
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log.Fatalln(err)
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}
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content := bytes.NewReader([]byte("Hello again"))
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key := []byte("32byteslongsecretkeymustprovided")
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h := md5.New()
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h.Write(key)
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encryptionKey := base64.StdEncoding.EncodeToString(key)
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encryptionKeyMD5 := base64.StdEncoding.EncodeToString(h.Sum(nil))
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// Amazon S3 does not store the encryption key you provide.
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// Instead S3 stores a randomly salted HMAC value of the
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// encryption key in order to validate future requests.
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// The salted HMAC value cannot be used to derive the value
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// of the encryption key or to decrypt the contents of the
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// encrypted object. That means, if you lose the encryption
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// key, you lose the object.
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var metadata = map[string][]string{
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"x-amz-server-side-encryption-customer-algorithm": []string{"AES256"},
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"x-amz-server-side-encryption-customer-key": []string{encryptionKey},
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"x-amz-server-side-encryption-customer-key-MD5": []string{encryptionKeyMD5},
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}
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// minioClient.TraceOn(os.Stderr) // Enable to debug.
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_, err = minioClient.PutObjectWithMetadata("mybucket", "my-encrypted-object.txt", content, metadata, nil)
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if err != nil {
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log.Fatalln(err)
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}
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var reqHeaders = minio.RequestHeaders{Header: http.Header{}}
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for k, v := range metadata {
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reqHeaders.Set(k, v[0])
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}
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coreClient := minio.Core{minioClient}
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reader, _, err := coreClient.GetObject("mybucket", "my-encrypted-object.txt", reqHeaders)
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if err != nil {
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log.Fatalln(err)
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}
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defer reader.Close()
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decBytes, err := ioutil.ReadAll(reader)
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if err != nil {
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log.Fatalln(err)
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}
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if !bytes.Equal(decBytes, []byte("Hello again")) {
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log.Fatalln("Expected \"Hello, world\", got %s", string(decBytes))
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}
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}
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