45 lines
1.4 KiB
Go
45 lines
1.4 KiB
Go
package services
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import (
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"bufio"
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"net"
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"strings"
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"time"
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)
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func NewIMAPHandler(log LoggerFunc) Handler {
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return func(conn net.Conn) {
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defer conn.Close()
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remote := conn.RemoteAddr().String()
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_, _ = conn.Write([]byte("* OK IMAP4rev1 Service Ready\r\n"))
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conn.SetDeadline(time.Now().Add(2 * time.Minute))
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scanner := bufio.NewScanner(conn)
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for scanner.Scan() {
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line := strings.TrimSpace(scanner.Text())
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if line == "" { continue }
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parts := strings.Fields(line)
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if len(parts) < 2 { continue }
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tag := parts[0]
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cmd := strings.ToUpper(parts[1])
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switch cmd {
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case "LOGIN":
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if len(parts) >= 4 {
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user := strings.Trim(parts[2], "\"")
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pass := strings.Trim(parts[3], "\"")
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log(Record{Timestamp: Now(), RemoteAddr: remoteIP(remote), RemotePort: remotePort(remote), Service: "imap", Details: map[string]string{"event":"login_attempt","username":user,"password":pass}})
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}
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_, _ = conn.Write([]byte(tag + " NO LOGIN failed\r\n"))
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case "CAPABILITY":
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_, _ = conn.Write([]byte("* CAPABILITY IMAP4rev1 AUTH=PLAIN\r\n"))
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_, _ = conn.Write([]byte(tag + " OK CAPABILITY completed\r\n"))
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case "LOGOUT":
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_, _ = conn.Write([]byte("* BYE IMAP4rev1 Server logging out\r\n"))
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_, _ = conn.Write([]byte(tag + " OK LOGOUT completed\r\n"))
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return
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default:
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_, _ = conn.Write([]byte(tag + " BAD Command not recognized\r\n"))
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}
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}
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}
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}
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