add dovecot auth

cmd/warehost-auth-dovecot/config.go

@@ -0,0 +1,24 @@
+package main
+
+import (
+	"io/ioutil"
+	"log"
+
+	"gopkg.in/yaml.v2"
+)
+
+// Config of warehost webserver
+type Config struct {
+	Database string `yaml:"database"`
+}
+
+// ReadConfigFile reads a config models by path to a yml file
+func ReadConfigFile(path string) *Config {
+	config := &Config{}
+	file, _ := ioutil.ReadFile(path)
+	err := yaml.Unmarshal(file, &config)
+	if err != nil {
+		log.Fatal(err)
+	}
+	return config
+}

cmd/warehost-auth-dovecot/config.yml.example

@@ -0,0 +1,2 @@
+---
+database: "host=localhost user=warehost dbname=warehost password=hallo sslmode=disable"

cmd/warehost-auth-dovecot/main.go

@@ -0,0 +1,56 @@
+package main
+
+import (
+	"bufio"
+	"os"
+	"os/exec"
+
+	"database/sql"
+	_ "github.com/lib/pq"
+
+	libpassword "dev.sum7.eu/sum7/warehost/lib/password"
+)
+
+var (
+	configFile string
+	username   string
+	password   string
+	execCmd    string
+	config     *Config
+	db         *sql.DB
+	err        error
+)
+
+func main() {
+	configFile = os.Args[1]
+	execCmd = os.Args[2]
+
+	pipe := os.NewFile(uintptr(3), "/dev/fd/3")
+	defer pipe.Close()
+	in := bufio.NewReader(pipe)
+	data, _ := in.ReadBytes(0)
+	username = string(data[:len(data)-1])
+	data, _ = in.ReadBytes(0)
+	password = string(data[:len(data)-1])
+
+	config = ReadConfigFile(configFile)
+
+	db, err = sql.Open("postgres", config.Database)
+	if err != nil {
+		os.Exit(1)
+	}
+	defer db.Close()
+
+	var realPassword string
+	err = db.QueryRow("select password from login where mail = $1", username).Scan(&realPassword)
+	if err != nil {
+		os.Exit(1)
+	}
+
+	output, _ := libpassword.Validate(realPassword, password)
+	if output {
+		exec.Command("bash", "-c", execCmd).Run()
+	} else {
+		os.Exit(1)
+	}
+}