I got paid to write this

This commit is contained in:
Sam Therapy 2022-06-22 22:59:17 +02:00
parent ff78fa1e50
commit 160c89ca1e
Signed by untrusted user: sam
GPG key ID: 4D8B07C18F31ACBD
13 changed files with 876 additions and 301 deletions

View file

@ -7,6 +7,8 @@
[`doggo`](https://github.com/mr-karan/doggo),
or [`q`](https://github.com/natesales/q)
This was made as my first major experiment with Go, so there are probably things that can be improved
The excellent [dns](https://github.com/miekg/dns) library for Go does most of the heavy
lifting.
@ -16,10 +18,10 @@ lifting.
- TCP
- TLS
- HTTPS (maybe)
- QUIC (extreme maybe)
## What doesn't
- DNS-over-QUIC (eventually)
- Your sanity after reading my awful code
- A motivation for making this after finding q and doggo
@ -29,5 +31,4 @@ lifting.
or just use stdlib's flags)
- Optimize everything
- Make the code less spaghetti
- Like not just having one massive unreadable file, this is AWFUL
- Documentation, documentation, documentation

283
awl.go
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@ -1,296 +1,15 @@
package main
import (
"encoding/json"
"fmt"
"net"
"os"
"runtime"
"strconv"
"strings"
"time"
"git.froth.zone/sam/awl/util"
"github.com/miekg/dns"
"github.com/urfave/cli/v2"
"golang.org/x/net/idna"
)
func main() {
// Custom version string
cli.VersionPrinter = func(c *cli.Context) {
fmt.Printf("%s version %s, built with %s\n", c.App.Name, c.App.Version, runtime.Version())
}
cli.VersionFlag = &cli.BoolFlag{
Name: "v",
Usage: "show version",
}
cli.HelpFlag = &cli.BoolFlag{
Name: "h",
Usage: "show this help",
}
// Hack to get rid of the annoying default on the CLI
oldFlagStringer := cli.FlagStringer
cli.FlagStringer = func(f cli.Flag) string {
return strings.TrimSuffix(oldFlagStringer(f), " (default: false)")
}
cli.AppHelpTemplate = `{{.Name}} - {{.Usage}}
Usage: {{.HelpName}} name [@server] [type]
<name> can be a name or an IP address
<type> defaults to A
arguments can be in any order
{{if .VisibleFlags}}
Options:
{{range .VisibleFlags}}{{.}}
{{end}}{{end}}`
app := &cli.App{
Name: "awl",
Usage: "drill, writ small",
Version: "v0.2.0",
Flags: []cli.Flag{
&cli.IntFlag{
Name: "port",
Aliases: []string{"p"},
Usage: "port to make DNS query",
DefaultText: "53 over plain TCP/UDP, 853 over TLS or QUIC, and 443 over HTTPS",
},
&cli.BoolFlag{
Name: "4",
Usage: "force IPv4",
},
&cli.BoolFlag{
Name: "6",
Usage: "force IPv6",
},
&cli.BoolFlag{
Name: "dnssec",
Aliases: []string{"D"},
Usage: "enable DNSSEC",
},
&cli.BoolFlag{
Name: "json",
Aliases: []string{"j"},
Usage: "return the result(s) as JSON",
},
&cli.BoolFlag{
Name: "short",
Aliases: []string{"s"},
Usage: "print just the results, equivalent to dig +short",
},
&cli.BoolFlag{
Name: "tcp",
Aliases: []string{"t"},
Usage: "use TCP (default: use UDP)",
},
&cli.BoolFlag{
Name: "tls",
Aliases: []string{"T"},
Usage: "use DNS-over-TLS",
},
&cli.BoolFlag{
Name: "https",
Aliases: []string{"H"},
Usage: "use DNS-over-HTTPS (NOT FULLY COMPLETE)",
},
&cli.BoolFlag{
Name: "quic",
Aliases: []string{"Q"},
Usage: "use DNS-over-QUIC (NOT YET IMPLEMENTED)",
},
&cli.BoolFlag{
Name: "no-truncate",
Usage: "Ignore truncation if a UDP request truncates (default: retry with TCP)",
},
&cli.BoolFlag{
Name: "reverse",
Aliases: []string{"x"},
Usage: "do a reverse lookup",
},
},
Action: func(c *cli.Context) error {
var err error
var resp util.Response
resp.Answers = parseArgs(c.Args().Slice())
// Set DNS-over-TLS, if enabled
port := c.Int("port")
// If port is not set, set it
if port == 0 {
if c.Bool("tls") || c.Bool("quic") {
port = 853
} else {
port = 53
}
}
if !c.Bool("https") {
resp.Answers.Server = net.JoinHostPort(resp.Answers.Server, strconv.Itoa(port))
} else {
resp.Answers.Server = "https://" + resp.Answers.Server
}
// Process the IP/Phone number so a PTR/NAPTR can be done
if c.Bool("reverse") {
if dns.TypeToString[resp.Answers.Request] == "A" {
resp.Answers.Request = dns.StringToType["PTR"]
}
resp.Answers.Name, err = util.ReverseDNS(resp.Answers.Name, dns.TypeToString[resp.Answers.Request])
}
// if the domain is not canonical, make it canonical
if !strings.HasSuffix(resp.Answers.Name, ".") {
resp.Answers.Name = fmt.Sprintf("%s.", resp.Answers.Name)
}
msg := new(dns.Msg)
msg.SetQuestion(resp.Answers.Name, resp.Answers.Request)
// Set DNSSEC if requested
if c.Bool("dnssec") {
msg.SetEdns0(1232, true)
}
var (
in *dns.Msg
)
// Make the DNS request
if c.Bool("https") {
in, err = util.ResolveHTTPS(msg, resp.Answers.Server)
} else if c.Bool("quic") {
return fmt.Errorf("quic: not yet implemented")
} else {
d := new(dns.Client)
// Set TCP/UDP, depending on flags
if c.Bool("tcp") {
d.Net = "tcp"
if c.Bool("4") {
d.Net = "tcp4"
}
if c.Bool("6") {
d.Net = "tcp6"
}
} else {
d.Net = "udp"
if c.Bool("4") {
d.Net = "udp4"
}
if c.Bool("6") {
d.Net = "udp6"
}
}
// This is apparently all it takes to enable DoT
// TODO: Is it really?
if c.Bool("tls") {
d.Net = "tcp-tls"
}
in, resp.Answers.RTT, err = d.Exchange(msg, resp.Answers.Server)
// If UDP truncates, use TCP instead
if !c.Bool("no-truncate") {
if in.MsgHdr.Truncated {
fmt.Printf(";; Truncated, retrying with TCP\n\n")
d.Net = "tcp"
if c.Bool("4") {
d.Net = "tcp4"
}
if c.Bool("6") {
d.Net = "tcp6"
}
in, resp.Answers.RTT, err = d.Exchange(msg, resp.Answers.Server)
}
}
}
if err != nil {
return err
}
if c.Bool("json") {
json, _ := json.MarshalIndent(in, "", " ")
fmt.Println(string(json))
} else {
if !c.Bool("short") {
// Print everything
fmt.Println(in)
fmt.Println(";; Query time:", resp.Answers.RTT)
fmt.Println(";; SERVER:", resp.Answers.Server)
fmt.Println(";; WHEN:", time.Now().Format(time.RFC1123))
fmt.Println(";; MSG SIZE rcvd:", in.Len())
} else {
// Print just the responses, nothing else
for _, res := range in.Answer {
temp := strings.Split(res.String(), "\t")
fmt.Println(temp[len(temp)-1])
}
}
}
return nil
},
}
app := prepareCLI()
err := app.Run(os.Args)
if err != nil {
fmt.Fprintln(os.Stderr, err)
os.Exit(1)
}
}
func parseArgs(args []string) util.Answers {
var (
resp util.Response
)
for _, arg := range args {
// If it starts with @, it's a DNS server
if strings.HasPrefix(arg, "@") {
resp.Answers.Server = strings.Split(arg, "@")[1]
continue
}
// If there's a dot, it's a name
if strings.Contains(arg, ".") {
resp.Answers.Name, _ = idna.ToUnicode(arg)
continue
}
// If it's a request, it's a request (duh)
if r, ok := dns.StringToType[strings.ToUpper(arg)]; ok {
resp.Answers.Request = r
continue
}
//else, assume it's a name
resp.Answers.Name, _ = idna.ToUnicode(arg)
}
// If nothing was set, set a default
if resp.Answers.Name == "" {
resp.Answers.Name = "."
if resp.Answers.Request == 0 {
resp.Answers.Request = dns.StringToType["NS"]
}
} else {
if resp.Answers.Request == 0 {
resp.Answers.Request = dns.StringToType["A"]
}
}
if resp.Answers.Server == "" {
resolv, err := dns.ClientConfigFromFile("/etc/resolv.conf")
if err != nil { // Query Google by default, needed for Windows since the DNS library doesn't support Windows
// TODO: Actually find where windows stuffs its dns resolvers
resp.Answers.Server = "8.8.4.4"
} else {
resp.Answers.Server = resolv.Servers[0]
}
}
return util.Answers{Server: resp.Answers.Server, Request: resp.Answers.Request, Name: resp.Answers.Name}
}

185
cli.go Normal file
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@ -0,0 +1,185 @@
package main
import (
"fmt"
"runtime"
"strings"
"git.froth.zone/sam/awl/util"
"github.com/miekg/dns"
"github.com/urfave/cli/v2"
"golang.org/x/net/idna"
)
// Do all the magic CLI crap
func prepareCLI() *cli.App {
// Custom version string
cli.VersionPrinter = func(c *cli.Context) {
fmt.Printf("%s version %s, built with %s\n", c.App.Name, c.App.Version, runtime.Version())
}
cli.VersionFlag = &cli.BoolFlag{
Name: "v",
Usage: "show version and exit",
}
cli.HelpFlag = &cli.BoolFlag{
Name: "h",
Usage: "show this help and exit",
}
// Hack to get rid of the annoying default on the CLI
oldFlagStringer := cli.FlagStringer
cli.FlagStringer = func(f cli.Flag) string {
return strings.TrimSuffix(oldFlagStringer(f), " (default: false)")
}
cli.AppHelpTemplate = `{{.Name}} - {{.Usage}}
Usage: {{.HelpName}} name [@server] [type]
<name> can be a name or an IP address
<type> defaults to A
arguments can be in any order
{{if .VisibleFlags}}
Options:
{{range .VisibleFlags}}{{.}}
{{end}}{{end}}`
app := &cli.App{
Name: "awl",
Usage: "drill, writ small",
Version: "v0.2.0",
Flags: []cli.Flag{
&cli.IntFlag{
Name: "port",
Aliases: []string{"p"},
Usage: "`port` to make DNS query",
DefaultText: "53 over plain TCP/UDP, 853 over TLS or QUIC, and 443 over HTTPS",
},
&cli.BoolFlag{
Name: "4",
Usage: "force IPv4",
},
&cli.BoolFlag{
Name: "6",
Usage: "force IPv6",
},
&cli.BoolFlag{
Name: "dnssec",
Aliases: []string{"D"},
Usage: "enable DNSSEC",
},
&cli.BoolFlag{
Name: "json",
Aliases: []string{"j"},
Usage: "return the result(s) as JSON",
},
&cli.BoolFlag{
Name: "short",
Aliases: []string{"s"},
Usage: "print just the results, equivalent to dig +short",
},
&cli.BoolFlag{
Name: "tcp",
Aliases: []string{"t"},
Usage: "use TCP (default: use UDP)",
},
&cli.BoolFlag{
Name: "tls",
Aliases: []string{"T"},
Usage: "use DNS-over-TLS",
},
&cli.BoolFlag{
Name: "https",
Aliases: []string{"H"},
Usage: "use DNS-over-HTTPS",
},
&cli.BoolFlag{
Name: "quic",
Aliases: []string{"Q"},
Usage: "use DNS-over-QUIC",
},
&cli.BoolFlag{
Name: "no-truncate",
Usage: "ignore truncation if a UDP request truncates (default: retry with TCP)",
},
&cli.BoolFlag{
Name: "z",
Usage: "set Z (zero) flag (default: not set) [THIS DOESN'T DO ANYTHING]",
},
&cli.BoolFlag{
Name: "cd",
Usage: "set CD (CheckingDisabled) flag (default: not set)",
},
&cli.BoolFlag{
Name: "no-rd",
Usage: "UNset RD (RecursionDesired) flag (default: set)",
},
&cli.BoolFlag{
Name: "no-ra",
Usage: "UNset RA (RecursionAvailable) flag (default: set)",
},
&cli.BoolFlag{
Name: "reverse",
Aliases: []string{"x"},
Usage: "do a reverse lookup",
},
},
Action: doQuery,
}
return app
}
// Parse the wildcard arguments, drill style
func parseArgs(args []string) (util.Answers, error) {
var (
resp util.Response
)
for _, arg := range args {
// If it starts with @, it's a DNS server
if strings.HasPrefix(arg, "@") {
resp.Answers.Server = strings.Split(arg, "@")[1]
continue
}
// If there's a dot, it's a name
if strings.Contains(arg, ".") {
resp.Answers.Name, _ = idna.ToUnicode(arg)
continue
}
// If it's a request, it's a request (duh)
if r, ok := dns.StringToType[strings.ToUpper(arg)]; ok {
resp.Answers.Request = r
continue
}
//else, assume it's a name
var err error
resp.Answers.Name, err = idna.ToUnicode(arg)
if err != nil {
return util.Answers{}, err
}
}
// If nothing was set, set a default
if resp.Answers.Name == "" {
resp.Answers.Name = "."
if resp.Answers.Request == 0 {
resp.Answers.Request = dns.StringToType["NS"]
}
} else {
if resp.Answers.Request == 0 {
resp.Answers.Request = dns.StringToType["A"]
}
}
if resp.Answers.Server == "" {
resolv, err := dns.ClientConfigFromFile("/etc/resolv.conf")
if err != nil { // Query Google by default, needed for Windows since the DNS library doesn't support Windows
// TODO: Actually find where windows stuffs its dns resolvers
resp.Answers.Server = "8.8.4.4"
} else {
resp.Answers.Server = resolv.Servers[0]
}
}
return util.Answers{Server: resp.Answers.Server, Request: resp.Answers.Request, Name: resp.Answers.Name}, nil
}

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@ -2,7 +2,10 @@
awl is a DNS lookup tool written in Go,
similar to (and heavily inspired by) drill.
It runs and displays similar outputs to drill, at the current time.
It runs and displays similar outputs to drill, without any frills.
Options are given to print with JSON
Supports results from DNS-over-[UDP, TCP, TLS, HTTPS, QUIC] servers
Why use this over the alternatives? Good question.
*/

34
go.mod
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@ -3,19 +3,35 @@ module git.froth.zone/sam/awl
go 1.18
require (
github.com/c-robinson/iplib v1.0.3
github.com/lucas-clemente/quic-go v0.27.2
github.com/miekg/dns v1.1.50
github.com/urfave/cli/v2 v2.10.2
golang.org/x/net v0.0.0-20220621193019-9d032be2e588
)
require (
github.com/cpuguy83/go-md2man/v2 v2.0.2 // indirect
github.com/russross/blackfriday/v2 v2.1.0 // indirect
github.com/xrash/smetrics v0.0.0-20201216005158-039620a65673 // indirect
golang.org/x/mod v0.4.2 // indirect
golang.org/x/sys v0.0.0-20220520151302-bc2c85ada10a // indirect
golang.org/x/text v0.3.7 // indirect
golang.org/x/tools v0.1.6-0.20210726203631-07bc1bf47fb2 // indirect
golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1 // indirect
github.com/davecgh/go-spew v1.1.1 // indirect
github.com/pmezard/go-difflib v1.0.0 // indirect
gopkg.in/yaml.v3 v3.0.1 // indirect
)
require (
github.com/cheekybits/genny v1.0.0 // indirect
github.com/cpuguy83/go-md2man/v2 v2.0.2 // indirect
github.com/fsnotify/fsnotify v1.4.9 // indirect
github.com/go-task/slim-sprig v0.0.0-20210107165309-348f09dbbbc0 // indirect
github.com/marten-seemann/qtls-go1-16 v0.1.5 // indirect
github.com/marten-seemann/qtls-go1-17 v0.1.2 // indirect
github.com/marten-seemann/qtls-go1-18 v0.1.2 // indirect
github.com/nxadm/tail v1.4.8 // indirect
github.com/onsi/ginkgo v1.16.4 // indirect
github.com/russross/blackfriday/v2 v2.1.0 // indirect
github.com/stretchr/testify v1.7.4
github.com/xrash/smetrics v0.0.0-20201216005158-039620a65673 // indirect
golang.org/x/crypto v0.0.0-20210921155107-089bfa567519 // indirect
golang.org/x/mod v0.6.0-dev.0.20220419223038-86c51ed26bb4 // indirect
golang.org/x/sys v0.0.0-20220615213510-4f61da869c0c // indirect
golang.org/x/text v0.3.7 // indirect
golang.org/x/tools v0.1.11 // indirect
gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7 // indirect
)

272
go.sum
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@ -1,49 +1,307 @@
github.com/c-robinson/iplib v1.0.3 h1:NG0UF0GoEsrC1/vyfX1Lx2Ss7CySWl3KqqXh3q4DdPU=
github.com/c-robinson/iplib v1.0.3/go.mod h1:i3LuuFL1hRT5gFpBRnEydzw8R6yhGkF4szNDIbF8pgo=
cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
cloud.google.com/go v0.31.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
cloud.google.com/go v0.37.0/go.mod h1:TS1dMSSfndXH133OKGwekG838Om/cQT0BUHV3HcBgoo=
dmitri.shuralyov.com/app/changes v0.0.0-20180602232624-0a106ad413e3/go.mod h1:Yl+fi1br7+Rr3LqpNJf1/uxUdtRUV+Tnj0o93V2B9MU=
dmitri.shuralyov.com/html/belt v0.0.0-20180602232347-f7d459c86be0/go.mod h1:JLBrvjyP0v+ecvNYvCpyZgu5/xkfAUhi6wJj28eUfSU=
dmitri.shuralyov.com/service/change v0.0.0-20181023043359-a85b471d5412/go.mod h1:a1inKt/atXimZ4Mv927x+r7UpyzRUf4emIoiiSC2TN4=
dmitri.shuralyov.com/state v0.0.0-20180228185332-28bcc343414c/go.mod h1:0PRwlb0D6DFvNNtx+9ybjezNCa8XF0xaYcETyp6rHWU=
git.apache.org/thrift.git v0.0.0-20180902110319-2566ecd5d999/go.mod h1:fPE2ZNJGynbRyZ4dJvy6G277gSllfV2HJqblrnkyeyg=
github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
github.com/anmitsu/go-shlex v0.0.0-20161002113705-648efa622239/go.mod h1:2FmKhYUyUczH0OGQWaF5ceTx0UBShxjsH6f8oGKYe2c=
github.com/beorn7/perks v0.0.0-20180321164747-3a771d992973/go.mod h1:Dwedo/Wpr24TaqPxmxbtue+5NUziq4I4S80YR8gNf3Q=
github.com/bradfitz/go-smtpd v0.0.0-20170404230938-deb6d6237625/go.mod h1:HYsPBTaaSFSlLx/70C2HPIMNZpVV8+vt/A+FMnYP11g=
github.com/buger/jsonparser v0.0.0-20181115193947-bf1c66bbce23/go.mod h1:bbYlZJ7hK1yFx9hf58LP0zeX7UjIGs20ufpu3evjr+s=
github.com/cheekybits/genny v1.0.0 h1:uGGa4nei+j20rOSeDeP5Of12XVm7TGUd4dJA9RDitfE=
github.com/cheekybits/genny v1.0.0/go.mod h1:+tQajlRqAUrPI7DOSpB0XAqZYtQakVtB7wXkRAgjxjQ=
github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDkc90ppPyw=
github.com/coreos/go-systemd v0.0.0-20181012123002-c6f51f82210d/go.mod h1:F5haX7vjVVG0kc13fIWeqUViNPyEJxv/OmvnBo0Yme4=
github.com/cpuguy83/go-md2man/v2 v2.0.2 h1:p1EgwI/C7NhT0JmVkwCD2ZBK8j4aeHQX2pMHHBfMQ6w=
github.com/cpuguy83/go-md2man/v2 v2.0.2/go.mod h1:tgQtvFlXSQOSOSIRvRPT7W67SCa46tRHOmNcaadrF8o=
github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
github.com/dustin/go-humanize v1.0.0/go.mod h1:HtrtbFcZ19U5GC7JDqmcUSB87Iq5E25KnS6fMYU6eOk=
github.com/flynn/go-shlex v0.0.0-20150515145356-3f9db97f8568/go.mod h1:xEzjJPgXI435gkrCt3MPfRiAkVrwSbHsst4LCFVfpJc=
github.com/francoispqt/gojay v1.2.13/go.mod h1:ehT5mTG4ua4581f1++1WLG0vPdaA9HaiDsoyrBGkyDY=
github.com/fsnotify/fsnotify v1.4.7/go.mod h1:jwhsz4b93w/PPRr/qN1Yymfu8t87LnFCMoQvtojpjFo=
github.com/fsnotify/fsnotify v1.4.9 h1:hsms1Qyu0jgnwNXIxa+/V/PDsU6CfLf6CNO8H7IWoS4=
github.com/fsnotify/fsnotify v1.4.9/go.mod h1:znqG4EE+3YCdAaPaxE2ZRY/06pZUdp0tY4IgpuI1SZQ=
github.com/ghodss/yaml v1.0.0/go.mod h1:4dBDuWmgqj2HViK6kFavaiC9ZROes6MMH2rRYeMEF04=
github.com/gliderlabs/ssh v0.1.1/go.mod h1:U7qILu1NlMHj9FlMhZLlkCdDnU1DBEAqr0aevW3Awn0=
github.com/go-errors/errors v1.0.1/go.mod h1:f4zRHt4oKfwPJE5k8C9vpYG+aDHdBFUsgrm6/TyX73Q=
github.com/go-task/slim-sprig v0.0.0-20210107165309-348f09dbbbc0 h1:p104kn46Q8WdvHunIJ9dAyjPVtrBPhSr3KT2yUst43I=
github.com/go-task/slim-sprig v0.0.0-20210107165309-348f09dbbbc0/go.mod h1:fyg7847qk6SyHyPtNmDHnmrv/HOrqktSC+C9fM+CJOE=
github.com/gogo/protobuf v1.1.1/go.mod h1:r8qH/GZQm5c6nD/R0oafs1akxWv10x8SbQlK7atdtwQ=
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go4.org v0.0.0-20180809161055-417644f6feb5/go.mod h1:MkTOUMDaeVYJUOUsaDXIhWPZYa1yOyC1qaOBpL57BhE=
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golang.org/x/crypto v0.0.0-20200221231518-2aa609cf4a9d/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
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golang.org/x/crypto v0.0.0-20210921155107-089bfa567519 h1:7I4JAnoQBe7ZtJcBaYHi5UtiO8tQHbUSXxL+pnGRANg=
golang.org/x/crypto v0.0.0-20210921155107-089bfa567519/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
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golang.org/x/sync v0.0.0-20210220032951-036812b2e83c/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
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golang.org/x/text v0.3.7 h1:olpwvP2KacW1ZWvsR7uQhoyTYvKAupfQrRGBFM352Gk=
golang.org/x/text v0.3.7/go.mod h1:u+2+/6zg+i71rQMx5EYifcz6MCKuco9NR6JIITiCfzQ=
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golang.org/x/tools v0.0.0-20190226205152-f727befe758c/go.mod h1:9Yl7xja0Znq3iFh3HoIrodX9oNMXvdceNzlUR8zjMvY=
golang.org/x/tools v0.0.0-20190425150028-36563e24a262/go.mod h1:RgjU9mgBXZiqYHBnxXauZ1Gv1EHHAz9KjViQ78xBX0Q=
golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
golang.org/x/tools v0.1.6-0.20210726203631-07bc1bf47fb2 h1:BonxutuHCTL0rBDnZlKjpGIQFTjyUVTexFOdWkB6Fg0=
golang.org/x/tools v0.0.0-20201224043029-2b0845dc783e/go.mod h1:emZCQorbCU4vsT4fOWvOPXz4eW1wZW4PmDk9uLelYpA=
golang.org/x/tools v0.1.1/go.mod h1:o0xws9oXOQQZyjljx8fwUC0k7L1pTE6eaCbjGeHmOkk=
golang.org/x/tools v0.1.6-0.20210726203631-07bc1bf47fb2/go.mod h1:o0xws9oXOQQZyjljx8fwUC0k7L1pTE6eaCbjGeHmOkk=
golang.org/x/tools v0.1.11 h1:loJ25fNOEhSXfHrpoGj91eCUThwdNX6u24rO1xnNteY=
golang.org/x/tools v0.1.11/go.mod h1:SgwaegtQh8clINPpECJMqnxLv9I09HLqnW3RMqW0CA4=
golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1 h1:go1bK/D/BFZV2I8cIQd1NKEZ+0owSTG1fDTci4IqFcE=
golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
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google.golang.org/api v0.1.0/go.mod h1:UGEZY7KEX120AnNLIHFMKIo4obdJhkp2tPbaPlQx13Y=
google.golang.org/appengine v1.1.0/go.mod h1:EbEs0AVv82hx2wNQdGPgUI5lhzA/G0D9YwlJXL52JkM=
google.golang.org/appengine v1.2.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4=
google.golang.org/appengine v1.3.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4=
google.golang.org/appengine v1.4.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4=
google.golang.org/genproto v0.0.0-20180817151627-c66870c02cf8/go.mod h1:JiN7NxoALGmiZfu7CAH4rXhgtRTLTxftemlI0sWmxmc=
google.golang.org/genproto v0.0.0-20180831171423-11092d34479b/go.mod h1:JiN7NxoALGmiZfu7CAH4rXhgtRTLTxftemlI0sWmxmc=
google.golang.org/genproto v0.0.0-20181029155118-b69ba1387ce2/go.mod h1:JiN7NxoALGmiZfu7CAH4rXhgtRTLTxftemlI0sWmxmc=
google.golang.org/genproto v0.0.0-20181202183823-bd91e49a0898/go.mod h1:7Ep/1NZk928CDR8SjdVbjWNpdIf6nzjE3BTgJDr2Atg=
google.golang.org/genproto v0.0.0-20190306203927-b5d61aea6440/go.mod h1:VzzqZJRnGkLBvHegQrXjBqPurQTc5/KpmUdxsrq26oE=
google.golang.org/grpc v1.14.0/go.mod h1:yo6s7OP7yaDglbqo1J04qKzAhqBH6lvTonzMVmEdcZw=
google.golang.org/grpc v1.16.0/go.mod h1:0JHn/cJsOMiMfNA9+DeHDlAU7KAAB5GDlYFpa9MZMio=
google.golang.org/grpc v1.17.0/go.mod h1:6QZJwpn2B+Zp71q/5VxRsJ6NXXVCE5NRUHRo+f3cWCs=
google.golang.org/grpc v1.19.0/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZiDr8c=
google.golang.org/protobuf v0.0.0-20200109180630-ec00e32a8dfd/go.mod h1:DFci5gLYBciE7Vtevhsrf46CRTquxDuWsQurQQe4oz8=
google.golang.org/protobuf v0.0.0-20200221191635-4d8936d0db64/go.mod h1:kwYJMbMJ01Woi6D6+Kah6886xMZcty6N08ah7+eCXa0=
google.golang.org/protobuf v0.0.0-20200228230310-ab0ca4ff8a60/go.mod h1:cfTl7dwQJ+fmap5saPgwCLgHXTUD7jkjRqWcaiX5VyM=
google.golang.org/protobuf v1.20.1-0.20200309200217-e05f789c0967/go.mod h1:A+miEFZTKqfCUM6K7xSMQL9OKL/b6hQv+e19PK+JZNE=
google.golang.org/protobuf v1.21.0/go.mod h1:47Nbq4nVaFHyn7ilMalzfO3qCViNmqZ2kzikPIcrTAo=
google.golang.org/protobuf v1.23.0/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
google.golang.org/protobuf v1.26.0-rc.1/go.mod h1:jlhhOSvTdKEhbULTjvd4ARK9grFBp09yW+WbY/TyQbw=
google.golang.org/protobuf v1.26.0 h1:bxAC2xTBsZGibn2RTntX0oH50xLsqy1OxA9tTL3p/lk=
google.golang.org/protobuf v1.26.0/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQnmE0givc=
gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
gopkg.in/fsnotify.v1 v1.4.7/go.mod h1:Tz8NjZHkW78fSQdbUxIjBTcgA1z1m8ZHf0WmKUhAMys=
gopkg.in/inf.v0 v0.9.1/go.mod h1:cWUDdTG/fYaXco+Dcufb5Vnc6Gp2YChqWtbxRZE0mXw=
gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7 h1:uRGJdciOHaEIrze2W8Q3AKkepLTh2hOroT7a+7czfdQ=
gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7/go.mod h1:dt/ZhP58zS4L8KSrWDmTeBkI65Dw0HsyUHuEVlX15mw=
gopkg.in/yaml.v2 v2.2.1/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
gopkg.in/yaml.v2 v2.2.4/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
gopkg.in/yaml.v2 v2.3.0/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
gopkg.in/yaml.v2 v2.4.0 h1:D8xgwECY7CYvx+Y2n4sBz93Jn9JRvxdiyyo8CTfuKaY=
gopkg.in/yaml.v2 v2.4.0/go.mod h1:RDklbk79AGWmwhnvt/jBztapEOGDOx6ZbXqjP6csGnQ=
gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
grpc.go4.org v0.0.0-20170609214715-11d0a25b4919/go.mod h1:77eQGdRu53HpSqPFJFmuJdjuHRquDANNeA4x7B8WQ9o=
honnef.co/go/tools v0.0.0-20180728063816-88497007e858/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
honnef.co/go/tools v0.0.0-20190106161140-3f1c8253044a/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
sourcegraph.com/sourcegraph/go-diff v0.5.0/go.mod h1:kuch7UrkMzY0X+p9CRK03kfuPQ2zzQcaEFbx8wA8rck=
sourcegraph.com/sqs/pbtypes v0.0.0-20180604144634-d3ebe8f20ae4/go.mod h1:ketZ/q3QxT9HOBeFhu6RdvsftgpsbFHBF5Cas6cDKZ0=

172
query.go Normal file
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package main
import (
"encoding/json"
"fmt"
"net"
"strconv"
"strings"
"time"
"git.froth.zone/sam/awl/query"
"git.froth.zone/sam/awl/util"
"github.com/miekg/dns"
"github.com/urfave/cli/v2"
)
func doQuery(c *cli.Context) error {
var err error
var resp util.Response
var isHTTPS bool
resp.Answers, err = parseArgs(c.Args().Slice())
if err != nil {
return nil
}
port := c.Int("port")
// If port is not set, set it
if port == 0 {
if c.Bool("tls") || c.Bool("quic") {
port = 853
} else {
port = 53
}
}
if c.Bool("https") || strings.HasPrefix(resp.Answers.Server, "https://") {
// add https:// if it doesn't already exist
if !strings.HasPrefix(resp.Answers.Server, "https://") {
resp.Answers.Server = "https://" + resp.Answers.Server
}
isHTTPS = true
} else {
resp.Answers.Server = net.JoinHostPort(resp.Answers.Server, strconv.Itoa(port))
}
// Process the IP/Phone number so a PTR/NAPTR can be done
if c.Bool("reverse") {
if dns.TypeToString[resp.Answers.Request] == "A" {
resp.Answers.Request = dns.StringToType["PTR"]
}
resp.Answers.Name, err = util.ReverseDNS(resp.Answers.Name, dns.TypeToString[resp.Answers.Request])
if err != nil {
return err
}
}
// if the domain is not canonical, make it canonical
if !strings.HasSuffix(resp.Answers.Name, ".") {
resp.Answers.Name = fmt.Sprintf("%s.", resp.Answers.Name)
}
msg := new(dns.Msg)
msg.SetQuestion(resp.Answers.Name, resp.Answers.Request)
// Set the zero flag if requested (does nothing)
if c.Bool("z") {
msg.Zero = true
}
// Disable DNSSEC validation if enabled
if c.Bool("cd") {
msg.CheckingDisabled = true
}
if c.Bool("no-rd") {
msg.RecursionDesired = false
}
if c.Bool("no-ra") {
msg.RecursionAvailable = false
}
// Set DNSSEC if requested
if c.Bool("dnssec") {
msg.SetEdns0(1232, true)
}
var in *dns.Msg
// Make the DNS request
if isHTTPS {
in, resp.Answers.RTT, err = query.ResolveHTTPS(msg, resp.Answers.Server)
} else if c.Bool("quic") {
in, resp.Answers.RTT, err = query.ResolveQUIC(msg, resp.Answers.Server)
} else {
d := new(dns.Client)
// Set TCP/UDP, depending on flags
if c.Bool("tcp") {
d.Net = "tcp"
if c.Bool("4") {
d.Net = "tcp4"
}
if c.Bool("6") {
d.Net = "tcp6"
}
} else {
d.Net = "udp"
if c.Bool("4") {
d.Net = "udp4"
}
if c.Bool("6") {
d.Net = "udp6"
}
}
// This is apparently all it takes to enable DoT
// TODO: Is it really?
if c.Bool("tls") {
d.Net = "tcp-tls"
}
in, resp.Answers.RTT, err = d.Exchange(msg, resp.Answers.Server)
if err != nil {
return err
}
// If UDP truncates, use TCP instead
if !c.Bool("no-truncate") {
if in.MsgHdr.Truncated {
fmt.Printf(";; Truncated, retrying with TCP\n\n")
d.Net = "tcp"
if c.Bool("4") {
d.Net = "tcp4"
}
if c.Bool("6") {
d.Net = "tcp6"
}
in, resp.Answers.RTT, err = d.Exchange(msg, resp.Answers.Server)
}
}
}
if err != nil {
return err
}
if c.Bool("json") {
json, err := json.MarshalIndent(in, "", " ")
if err != nil {
return err
}
fmt.Println(string(json))
} else {
if !c.Bool("short") {
// Print everything
fmt.Println(in)
fmt.Println(";; Query time:", resp.Answers.RTT)
fmt.Println(";; SERVER:", resp.Answers.Server)
fmt.Println(";; WHEN:", time.Now().Format(time.RFC1123))
fmt.Println(";; MSG SIZE rcvd:", in.Len())
} else {
// Print just the responses, nothing else
for _, res := range in.Answer {
temp := strings.Split(res.String(), "\t")
fmt.Println(temp[len(temp)-1])
}
}
}
return nil
}

54
query/HTTPS.go Normal file
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package query
import (
"bytes"
"fmt"
"io"
"net/http"
"time"
"github.com/miekg/dns"
)
// Resolve a DNS-over-HTTPS query
//
// Currently only supports POST requests
func ResolveHTTPS(msg *dns.Msg, server string) (*dns.Msg, time.Duration, error) {
httpR := &http.Client{}
buf, err := msg.Pack()
if err != nil {
return nil, 0, err
}
// query := server + "?dns=" + base64.RawURLEncoding.EncodeToString(buf)
req, err := http.NewRequest("POST", server, bytes.NewBuffer(buf))
if err != nil {
return nil, 0, fmt.Errorf("DoH: %s", err.Error())
}
req.Header.Set("Content-Type", "application/dns-message")
req.Header.Set("Accept", "application/dns-message")
now := time.Now()
res, err := httpR.Do(req)
rtt := time.Since(now)
if err != nil {
return nil, 0, fmt.Errorf("DoH HTTP request error: %s", err.Error())
}
defer res.Body.Close()
if res.StatusCode != http.StatusOK {
return nil, 0, fmt.Errorf("DoH server responded with HTTP %d", res.StatusCode)
}
fullRes, err := io.ReadAll(res.Body)
if err != nil {
return nil, 0, fmt.Errorf("DoH body read error: %s", err.Error())
}
response := dns.Msg{}
err = response.Unpack(fullRes)
if err != nil {
return nil, 0, fmt.Errorf("DoH dns message unpack error: %s", err.Error())
}
return &response, rtt, nil
}

58
query/QUIC.go Normal file
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package query
import (
"crypto/tls"
"io"
"time"
"github.com/lucas-clemente/quic-go"
"github.com/miekg/dns"
)
// Resolve DNS over QUIC, the hip new standard (for privacy I think, IDK)
func ResolveQUIC(msg *dns.Msg, server string) (*dns.Msg, time.Duration, error) {
tls := &tls.Config{
NextProtos: []string{"doq"},
}
connection, err := quic.DialAddr(server, tls, nil)
if err != nil {
return nil, 0, err
}
// Close with error: no error
defer connection.CloseWithError(0, "")
// Compress request to over-the-wire
buf, err := msg.Pack()
if err != nil {
return nil, 0, err
}
t := time.Now()
stream, err := connection.OpenStream()
if err != nil {
return nil, 0, err
}
_, err = stream.Write(buf)
if err != nil {
return nil, 0, err
}
fullRes, err := io.ReadAll(stream)
if err != nil {
return nil, 0, err
}
rtt := time.Since(t)
err = stream.Close()
if err != nil {
return nil, 0, err
}
response := dns.Msg{}
err = response.Unpack(fullRes)
if err != nil {
return nil, 0, err
}
return &response, rtt, nil
}

2
query/docs.go Normal file
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@ -0,0 +1,2 @@
// Package for the special query types
package query

2
util/docs.go Normal file
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@ -0,0 +1,2 @@
// Helper functions
package util

55
util/helpers.go Normal file
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package util
import (
"errors"
"fmt"
"strings"
"time"
"github.com/miekg/dns"
)
type Response struct {
Answers Answers `json:"Response"` // These be DNS query answers
}
// The Answers struct is the basic structure of a DNS request
// to be returned to the user upon making a request
type Answers struct {
Server string `json:"Server"` // The server to make the DNS request from
Request uint16 `json:"Request"` // The type of request
Name string `json:"Name"` // The domain name to make a DNS request for
RTT time.Duration `json:"RTT"` // The time it took to make the DNS query
}
// Given an IP or phone number, return a canonical string to be queried
func ReverseDNS(address string, query string) (string, error) {
if query == "PTR" {
return dns.ReverseAddr(address)
} else if query == "NAPTR" {
// get rid of characters not needed
replacer := strings.NewReplacer("+", "", " ", "", "-", "")
address = replacer.Replace(address)
// reverse the order of the string
address = reverse(address)
var arpa strings.Builder
// Make it canonical
for _, c := range address {
fmt.Fprintf(&arpa, "%c.", c)
}
arpa.WriteString("e164.arpa.")
return arpa.String(), nil
}
return "", errors.New("ReverseDNS: -x flag given but no IP found")
}
// Reverse a string, return the string in reverse
func reverse(s string) string {
rns := []rune(s)
for i, j := 0, len(rns)-1; i < j; i, j = i+1, j-1 {
rns[i], rns[j] = rns[j], rns[i]
}
return string(rns)
}

50
util/helpers_test.go Normal file
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package util
import (
"testing"
"github.com/stretchr/testify/assert"
)
func TestIPv4(t *testing.T) {
act, err := ReverseDNS("8.8.4.4", "PTR")
assert.Nil(t, err)
assert.Equal(t, act, "4.4.8.8.in-addr.arpa.", "IPv4 reverse")
}
// WIP
// func FuzzIPv4(f *testing.F) {
// f.Add("1.1.1.1", "1.1.1.1.in-addr.arpa")
// f.Fuzz(func(t *testing.T, a string, b string) {
// _, err := ReverseDNS(a, b)
// assert.Nil(t, err)
// })
// }
func TestIPv6(t *testing.T) {
act, err := ReverseDNS("2606:4700:4700::1111", "PTR")
assert.Nil(t, err)
assert.Equal(t, act, "1.1.1.1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.7.4.0.0.7.4.6.0.6.2.ip6.arpa.", "IPv6 reverse")
}
func TestNAPTR(t *testing.T) {
tests := []struct {
in string
want string
}{
{"1-800-555-1234", "4.3.2.1.5.5.5.0.0.8.1.e164.arpa."},
{"+1 800555 1234", "4.3.2.1.5.5.5.0.0.8.1.e164.arpa."},
{"18005551234", "4.3.2.1.5.5.5.0.0.8.1.e164.arpa."},
{"+1-770-555-1212", "2.1.2.1.5.5.5.0.7.7.1.e164.arpa."},
}
for _, test := range tests {
act, err := ReverseDNS(test.in, "NAPTR")
assert.Nil(t, err)
assert.Equal(t, test.want, act)
}
}
func TestInvalid(t *testing.T) {
_, err := ReverseDNS("AAAAA", "A")
assert.NotNil(t, err)
}