181 lines
4.5 KiB
Go
181 lines
4.5 KiB
Go
// Copyright or © or Copr. happyDNS (2020)
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//
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// contact@happydns.org
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//
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// This software is a computer program whose purpose is to provide a modern
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// interface to interact with DNS systems.
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//
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// This software is governed by the CeCILL license under French law and abiding
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// by the rules of distribution of free software. You can use, modify and/or
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// redistribute the software under the terms of the CeCILL license as
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// circulated by CEA, CNRS and INRIA at the following URL
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// "http://www.cecill.info".
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//
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// As a counterpart to the access to the source code and rights to copy, modify
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// and redistribute granted by the license, users are provided only with a
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// limited warranty and the software's author, the holder of the economic
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// rights, and the successive licensors have only limited liability.
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//
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// In this respect, the user's attention is drawn to the risks associated with
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// loading, using, modifying and/or developing or reproducing the software by
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// the user in light of its specific status of free software, that may mean
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// that it is complicated to manipulate, and that also therefore means that it
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// is reserved for developers and experienced professionals having in-depth
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// computer knowledge. Users are therefore encouraged to load and test the
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// software's suitability as regards their requirements in conditions enabling
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// the security of their systems and/or data to be ensured and, more generally,
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// to use and operate it in the same conditions as regards security.
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//
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// The fact that you are presently reading this means that you have had
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// knowledge of the CeCILL license and that you accept its terms.
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package svcs
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import (
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"bytes"
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"fmt"
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"net"
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"github.com/miekg/dns"
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"git.happydns.org/happydns/model"
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)
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type SSHFP struct {
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Algorithm uint8 `json:"algorithm"`
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Type uint8 `json:"type"`
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FingerPrint string `json:"fingerprint"`
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}
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type Server struct {
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A *net.IP `json:"A,omitempty" happydns:"label=ipv4,description=Server's IPv4"`
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AAAA *net.IP `json:"AAAA,omitempty" happydns:"label=ipv6,description=Server's IPv6"`
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SSHFP []*SSHFP `json:"SSHFP,omitempty" happydns:"label=SSH Fingerprint,description=Server's SSH fingerprint"`
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}
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func (s *Server) GetNbResources() int {
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return 1
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}
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func (s *Server) GenComment(origin string) string {
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var buffer bytes.Buffer
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if s.A != nil {
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buffer.WriteString(s.A.String())
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if s.AAAA != nil {
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buffer.WriteString("; ")
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}
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}
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if s.AAAA != nil {
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buffer.WriteString(s.AAAA.String())
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}
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if s.SSHFP != nil {
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buffer.WriteString(fmt.Sprintf(" + %d SSHFP", len(s.SSHFP)))
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}
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return buffer.String()
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}
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func (s *Server) GenRRs(domain string, ttl uint32) (rrs []dns.RR) {
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if s.A != nil {
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rrs = append(rrs, &dns.A{
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Hdr: dns.RR_Header{
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Name: domain,
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Rrtype: dns.TypeA,
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Class: dns.ClassINET,
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Ttl: ttl,
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},
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A: *s.A,
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})
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}
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if s.AAAA != nil {
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rrs = append(rrs, &dns.AAAA{
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Hdr: dns.RR_Header{
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Name: domain,
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Rrtype: dns.TypeAAAA,
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Class: dns.ClassINET,
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Ttl: ttl,
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},
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AAAA: *s.AAAA,
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})
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}
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for _, sshfp := range s.SSHFP {
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rrs = append(rrs, &dns.SSHFP{
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Hdr: dns.RR_Header{
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Name: domain,
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Rrtype: dns.TypeSSHFP,
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Class: dns.ClassINET,
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Ttl: ttl,
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},
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Algorithm: sshfp.Algorithm,
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Type: sshfp.Type,
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FingerPrint: sshfp.FingerPrint,
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})
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}
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return
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}
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func server_analyze(a *Analyzer) error {
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pool := map[string][]dns.RR{}
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for _, record := range a.searchRR(AnalyzerRecordFilter{Type: dns.TypeA}, AnalyzerRecordFilter{Type: dns.TypeAAAA}, AnalyzerRecordFilter{Type: dns.TypeSSHFP}) {
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domain := record.Header().Name
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pool[domain] = append(pool[domain], record)
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}
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next_pool:
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for dn, rrs := range pool {
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s := &Server{}
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for _, rr := range rrs {
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if rr.Header().Rrtype == dns.TypeA {
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if s.A != nil {
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continue next_pool
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}
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s.A = &rr.(*dns.A).A
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} else if rr.Header().Rrtype == dns.TypeAAAA {
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if s.AAAA != nil {
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continue next_pool
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}
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s.AAAA = &rr.(*dns.AAAA).AAAA
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} else if rr.Header().Rrtype == dns.TypeSSHFP {
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sshfp := rr.(*dns.SSHFP)
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s.SSHFP = append(s.SSHFP, &SSHFP{
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Algorithm: sshfp.Algorithm,
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Type: sshfp.Type,
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FingerPrint: sshfp.FingerPrint,
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})
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}
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}
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for _, rr := range rrs {
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a.useRR(rr, dn, s)
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}
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}
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return nil
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}
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func init() {
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RegisterService(
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func() happydns.Service {
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return &Server{}
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},
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server_analyze,
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ServiceInfos{
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Name: "Server",
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Description: "This is a server",
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Categories: []string{
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"server",
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},
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},
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100,
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)
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}
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