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Try using github.com/ThomsonReutersEikon/go-ntlm (via omniboost's copy) #145

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Try using github.com/ThomsonReutersEikon/go-ntlm (via omniboost's copy) #145

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22f10a0
Try using github.com/ThomsonReutersEikon/go-ntlm (via omniboost's copy)
samuong Apr 25, 2025
47d3a49
Remove hard-coded password
samuong Apr 25, 2025
0250bf0
Add error check
samuong Apr 25, 2025
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29 changes: 24 additions & 5 deletions authenticator.go
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Original file line number Diff line number Diff line change
@@ -1,4 +1,4 @@
// Copyright 2019, 2021, 2024 The Alpaca Authors
// Copyright 2019, 2021, 2024, 2025 The Alpaca Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
Expand All @@ -23,6 +23,7 @@ import (
"os"
"strings"

"github.com/ThomsonReutersEikon/go-ntlm/ntlm"
"github.com/samuong/go-ntlmssp"
)

Expand All @@ -34,6 +35,10 @@ type authenticator struct {

func (a authenticator) do(req *http.Request, rt http.RoundTripper) (*http.Response, error) {
hostname, _ := os.Hostname() // in case of error, just use the zero value ("") as hostname
// XXX: github.com/ThomsonReutersEikon/go-ntlm doesn't seem to have a
// way to generate a negotiate message (or even a hardcoded one in the
// library?). Use the one from github.com/Azure/go-ntlmssp, and hope
// that it works ¯\_(ツ)_/¯
negotiate, err := ntlmssp.NewNegotiateMessage(a.domain, hostname)
if err != nil {
log.Printf("Error creating NTLM Type 1 (Negotiate) message: %v", err)
Expand All @@ -49,20 +54,34 @@ func (a authenticator) do(req *http.Request, rt http.RoundTripper) (*http.Respon
return resp, nil
}
resp.Body.Close()
challenge, err := base64.StdEncoding.DecodeString(
challengeBytes, err := base64.StdEncoding.DecodeString(
strings.TrimPrefix(resp.Header.Get("Proxy-Authenticate"), "NTLM "))
if err != nil {
log.Printf("Error decoding NTLM Type 2 (Challenge) message: %v", err)
return nil, err
}
authenticate, err := ntlmssp.ProcessChallengeWithHash(
challenge, a.domain, a.username, a.hash)
challenge, err := ntlm.ParseChallengeMessage(challengeBytes)
if err != nil {
log.Printf("Error parsing NTLM Type 2 (Challenge) message: %v", err)
return nil, err
}
session, err := ntlm.CreateClientSession(ntlm.Version2, ntlm.ConnectionlessMode)
if err != nil {
log.Printf("Error creating NTLM client session: %v", err)
return nil, err
}
session.SetUserInfo(a.username, os.Getenv("ALPACA_PASSWORD"), a.domain)
if err := session.ProcessChallengeMessage(challenge); err != nil {
log.Printf("Error processing NTLM Type 2 (Challenge) message: %v", err)
return nil, err
}
authenticate, err := session.GenerateAuthenticateMessage()
if err != nil {
log.Printf("Error processing NTLM Type 2 (Challenge) message: %v", err)
return nil, err
}
req.Header.Set("Proxy-Authorization",
"NTLM "+base64.StdEncoding.EncodeToString(authenticate))
"NTLM "+base64.StdEncoding.EncodeToString(authenticate.Bytes()))
return rt.RoundTrip(req)
}

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3 changes: 3 additions & 0 deletions go.mod
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Original file line number Diff line number Diff line change
Expand Up @@ -15,6 +15,7 @@ require (
)

require (
github.com/ThomsonReutersEikon/go-ntlm v0.0.0-00010101000000-000000000000
github.com/alessio/shellescape v1.4.1 // indirect
github.com/danieljoos/wincred v1.2.0 // indirect
github.com/davecgh/go-spew v1.1.1 // indirect
Expand All @@ -26,3 +27,5 @@ require (
gopkg.in/sourcemap.v1 v1.0.5 // indirect
gopkg.in/yaml.v3 v3.0.1 // indirect
)

replace github.com/ThomsonReutersEikon/go-ntlm => github.com/omniboost/ThomsonReutersEikon-go-ntlm v0.0.0-20200629081634-2b904c46aa41
2 changes: 2 additions & 0 deletions go.sum
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Original file line number Diff line number Diff line change
Expand Up @@ -10,6 +10,8 @@ github.com/godbus/dbus/v5 v5.1.0 h1:4KLkAxT3aOY8Li4FRJe/KvhoNFFxo0m6fNuFUO8QJUk=
github.com/godbus/dbus/v5 v5.1.0/go.mod h1:xhWf0FNVPg57R7Z0UbKHbJfkEywrmjJnf7w5xrFpKfA=
github.com/keybase/go-keychain v0.0.0-20231219164618-57a3676c3af6 h1:IsMZxCuZqKuao2vNdfD82fjjgPLfyHLpR41Z88viRWs=
github.com/keybase/go-keychain v0.0.0-20231219164618-57a3676c3af6/go.mod h1:3VeWNIJaW+O5xpRQbPp0Ybqu1vJd/pm7s2F473HRrkw=
github.com/omniboost/ThomsonReutersEikon-go-ntlm v0.0.0-20200629081634-2b904c46aa41 h1:g5MhOh7x3/HJ4hjx1U8UuCqbmlTwAdkNe5tPL/17q3g=
github.com/omniboost/ThomsonReutersEikon-go-ntlm v0.0.0-20200629081634-2b904c46aa41/go.mod h1:1GjY7cBv+3oSiN701BVraCLtLPchBiGIB6t7hnMowSA=
github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
github.com/robertkrimen/otto v0.4.0 h1:/c0GRrK1XDPcgIasAsnlpBT5DelIeB9U/Z/JCQsgr7E=
Expand Down