228 lines
6.1 KiB
Go
228 lines
6.1 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 abstract
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import (
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"crypto/sha256"
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"encoding/base64"
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"encoding/hex"
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"fmt"
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"strings"
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"github.com/miekg/dns"
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"git.happydns.org/happydns/model"
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"git.happydns.org/happydns/services"
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"git.happydns.org/happydns/utils"
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)
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type OpenPGP struct {
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Username string `json:"username,omitempty"`
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Identifier string `json:"identifier,omitempty"`
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PublicKey happydns.HexaString `json:"pubkey"`
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}
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func (s *OpenPGP) GetNbResources() int {
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return 1
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}
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func (s *OpenPGP) GenComment(origin string) string {
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return fmt.Sprintf("%s", s.Username)
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}
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func (s *OpenPGP) GenRRs(domain string, ttl uint32, origin string) (rrs []dns.RR) {
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if len(s.PublicKey) > 0 {
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if s.Username != "" {
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s.Identifier = fmt.Sprintf("%x", sha256.Sum224([]byte(s.Username)))
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}
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rrs = append(rrs, &dns.OPENPGPKEY{
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Hdr: dns.RR_Header{
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Name: utils.DomainJoin(fmt.Sprintf("%s._openpgpkey", s.Identifier), domain),
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Rrtype: dns.TypeOPENPGPKEY,
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Class: dns.ClassINET,
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Ttl: ttl,
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},
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PublicKey: base64.StdEncoding.EncodeToString(s.PublicKey),
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})
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}
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return
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}
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type SMimeCert struct {
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Username string `json:"username,omitempty"`
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Identifier string `json:"identifier,omitempty"`
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CertUsage uint8 `json:"certusage"`
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Selector uint8 `json:"selector"`
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MatchingType uint8 `json:"matchingtype"`
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Certificate happydns.HexaString `json:"certificate"`
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}
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func (s *SMimeCert) GetNbResources() int {
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return 1
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}
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func (s *SMimeCert) GenComment(origin string) string {
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return fmt.Sprintf("%s", s.Username)
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}
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func (s *SMimeCert) GenRRs(domain string, ttl uint32, origin string) (rrs []dns.RR) {
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if len(s.Certificate) > 0 {
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if s.Username != "" {
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s.Identifier = fmt.Sprintf("%x", sha256.Sum224([]byte(s.Username)))
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}
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rrs = append(rrs, &dns.SMIMEA{
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Hdr: dns.RR_Header{
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Name: utils.DomainJoin(fmt.Sprintf("%s._smimecert", s.Identifier), domain),
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Rrtype: dns.TypeSMIMEA,
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Class: dns.ClassINET,
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Ttl: ttl,
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},
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Usage: s.CertUsage,
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Selector: s.Selector,
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MatchingType: s.MatchingType,
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Certificate: hex.EncodeToString(s.Certificate),
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})
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}
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return
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}
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func openpgpkey_analyze(a *svcs.Analyzer) (err error) {
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for _, record := range a.SearchRR(svcs.AnalyzerRecordFilter{Type: dns.TypeOPENPGPKEY, Contains: "._openpgpkey."}) {
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if openpgpkey, ok := record.(*dns.OPENPGPKEY); ok {
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domain := record.Header().Name
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domain = domain[strings.Index(domain, "._openpgpkey")+13:]
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identifier := strings.TrimSuffix(record.Header().Name, "._openpgpkey."+domain)
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var pubkey []byte
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pubkey, err = base64.StdEncoding.DecodeString(openpgpkey.PublicKey)
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if err != nil {
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return
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}
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err = a.UseRR(
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record,
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domain,
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&OpenPGP{
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Identifier: identifier,
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PublicKey: pubkey,
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},
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)
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if err != nil {
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return
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}
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}
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}
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return
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}
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func smimea_analyze(a *svcs.Analyzer) (err error) {
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for _, record := range a.SearchRR(svcs.AnalyzerRecordFilter{Type: dns.TypeSMIMEA, Contains: "._smimecert."}) {
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if smimecert, ok := record.(*dns.SMIMEA); ok {
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domain := record.Header().Name
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domain = domain[strings.Index(domain, "._smimecert")+12:]
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identifier := strings.TrimSuffix(record.Header().Name, "._smimecert."+domain)
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var cert []byte
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cert, err = hex.DecodeString(smimecert.Certificate)
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if err != nil {
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return
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}
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err = a.UseRR(
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record,
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domain,
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&SMimeCert{
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Identifier: identifier,
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CertUsage: smimecert.Usage,
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Selector: smimecert.Selector,
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MatchingType: smimecert.MatchingType,
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Certificate: cert,
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},
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)
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if err != nil {
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return
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}
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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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svcs.RegisterService(
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func() happydns.Service {
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return &OpenPGP{}
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},
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openpgpkey_analyze,
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svcs.ServiceInfos{
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Name: "PGP Key",
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Description: "Let users retrieve PGP key automatically.",
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Family: svcs.Abstract,
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Categories: []string{
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"email",
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},
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Restrictions: svcs.ServiceRestrictions{
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NearAlone: true,
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NeedTypes: []uint16{
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dns.TypeOPENPGPKEY,
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},
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},
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},
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1,
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)
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svcs.RegisterService(
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func() happydns.Service {
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return &SMimeCert{}
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},
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smimea_analyze,
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svcs.ServiceInfos{
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Name: "SMimeCert",
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Description: "Publish S/MIME certificate.",
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Family: svcs.Abstract,
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Categories: []string{
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"email",
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},
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Restrictions: svcs.ServiceRestrictions{
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NearAlone: true,
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NeedTypes: []uint16{
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dns.TypeSMIMEA,
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},
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},
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},
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1,
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)
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}
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