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HTTP(S)终端节点使用样例

消息通知服务 SMN-示例代码:Go语言

Go语言 package demo import ( "bytes" "crypto" "crypto/rsa" "crypto/x509" "encoding/base64" "encoding/json" "encoding/pem" "fmt" "io/ioutil" ) type Message struct { Signature string `json:"signature"` Subject *string `json:"subject"` TopicUrn string `json:"topic_urn"` MessageId string `json:"message_id"` SignatureVersion string `json:"signature_version"` Type string `json:"type"` Message string `json:"message"` SubscribeUrl string `json:"subscribe_url"` UnsubscribeUrl string `json:"unsubscribe_url"` SigningCertUrl string `json:"signing_cert_url"` Timestamp string `json:"timestamp"` } func VerifyMessage(pemFile string, message string) bool { msg := Message{} err := json.Unmarshal([]byte(message), &msg) if err != nil { fmt.Println("Convert json to struct failed") return false } pemContent, err := ioutil.ReadFile(pemFile) if err != nil { fmt.Println("Read pem file failed") return false } certDerblock, _ := pem.Decode(pemContent) if certDerblock == nil { fmt.Println("Decode pem file failed") return false } cert, err := x509.ParseCertificate(certDerblock.Bytes) if err != nil { fmt.Println("Parse cert failed") return false } msgString := buildMessage(&msg) msgHash := crypto.SHA256.New() msgHash.Write([]byte(msgString)) msgHashSum := msgHash.Sum(nil) decodeSign, _ := base64.StdEncoding.DecodeString(msg.Signature) publicKey := cert.PublicKey.(*rsa.PublicKey) err = rsa.VerifyPKCS1v15(publicKey, crypto.SHA256, msgHashSum, decodeSign) if err != nil { fmt.Println("Verify failed") return false } else { fmt.Println("Verify success") return true } } func buildMessage(msg *Message) string { if msg.Type == "Notification" { return buildNotificationMessage(msg) } else if msg.Type == "SubscriptionConfirmation" || msg.Type == "UnsubscribeConfirmation" { return buildSubscriptionMessage(msg) } return "" } func buildNotificationMessage(msg *Message) string { buf := bytes.Buffer{} buf.WriteString("message\n" + msg.Message + "\n") buf.WriteString("message_id\n" + msg.MessageId + "\n") // msg中存在Subject字段不存在的场景，需要特殊处理 if msg.Subject != nil { buf.WriteString("subject\n" + *msg.Subject + "\n") } buf.WriteString("timestamp\n" + msg.Timestamp + "\n") buf.WriteString("topic_urn\n" + msg.TopicUrn + "\n") buf.WriteString("type\n" + msg.Type + "\n") return buf.String() } func buildSubscriptionMessage(msg *Message) string { buf := bytes.Buffer{} buf.WriteString("message\n" + msg.Message + "\n") buf.WriteString("message_id\n" + msg.MessageId + "\n") buf.WriteString("subscribe_url\n" + msg.SubscribeUrl + "\n") buf.WriteString("timestamp\n" + msg.Timestamp + "\n") buf.WriteString("topic_urn\n" + msg.TopicUrn + "\n") buf.WriteString("type\n" + msg.Type + "\n") return buf.String() } 该示例代码已在go 1.15版本上测试通过。

消息通知服务 SMN HTTP(S)终端节点使用样例