akms-simulator.go

package main

import (
	"encoding/json"
	"io"
	"log"
	"net/http"
	"os"

	"github.com/sirupsen/logrus"
)

type LogFile struct {
	Source string            `json:"source"`
	Body   PushKSAKeyRequest `json:"body"`
}
type PushKSAKeyRequest struct {
	RequestID string   `json:"request_ID"`
	ProcessID string   `json:"process_ID"`
	KSAKeys   []KSAKey `json:"ksa_keys"`
}

type KSAKey struct {
	KeyID string `json:"key_ID"`
	Key   string `json:"key"`
}

func main() {
	logrus.Info("Starting AKMS Simulator...")

	http.HandleFunc("/api/v1/keys/push_ksa_key", handlePushKsaKey)
	http.HandleFunc("/debug/get_log_file", getLogFile)
	log.Fatal(http.ListenAndServe(":4444", nil))
}

func getLogFile(w http.ResponseWriter, r *http.Request) {
	logrus.Info("Log file requested")
	http.ServeFile(w, r, "akms-simulator.log")
}

func handlePushKsaKey(w http.ResponseWriter, r *http.Request) {
	if r.Method != http.MethodPost {
		http.Error(w, "Method not allowed", http.StatusMethodNotAllowed)
		logrus.Errorf("Method not allowed: %s", r.Method)
		return
	}

	body, err := io.ReadAll(r.Body)
	if err != nil {
		http.Error(w, "Failed to read request body", http.StatusInternalServerError)
		logrus.Errorf("Failed to read request body: %s", err)
		return
	}

	ip := r.RemoteAddr
	logstring := "Request came from: " + ip + "; Body: " + string(body)
	logrus.Info(logstring)

	var bodyObject PushKSAKeyRequest
	err = json.Unmarshal(body, &bodyObject)
	if err != nil {
		logrus.Errorf("Error parsing body into PushKSAKeyRequest: %s", err)
		return
	}

	logFile := LogFile{Source: ip, Body: bodyObject}
	jsonLogFile, err := json.Marshal(logFile)
	if err != nil {
		logrus.Errorf("Error marshaling logFile: %s", err)
		w.WriteHeader(http.StatusInternalServerError)
		return
	}

	// Append jsonLogFile to akms-logfile.log
	f, err := os.OpenFile("akms-simulator.log", os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0644)
	if err != nil {
		logrus.Errorf("Error opening log file: %s", err)
		w.WriteHeader(http.StatusInternalServerError)
		return
	}
	defer f.Close() //nolint:errcheck
	if _, err := f.Write(jsonLogFile); err != nil {
		logrus.Errorf("Error writing to log file: %s", err)
		w.WriteHeader(http.StatusInternalServerError)
		return
	}

	w.WriteHeader(http.StatusNoContent)
}