nodejs digest authentication failing

0 votes

I'm attempting to send an HTTP GET request and use the digest method to authenticate after obtaining the authentication header. Even though my code generates identical authentication responses to Firefox and curl when given the same authentication request, I keep getting a 401 Unauthorized response. With the same results, I tried the popular Nodejs module "request." The output of two queries from tcpdump is shown below. The first is a success from Firefox:

15:18:03.615255 IP 192.168.18.1.33966 > 192.168.20.220.30005: tcp 0
....E..<..@.@.............u5K3........9..\.........
"`..........
15:18:03.634223 IP 192.168.20.220.30005 > 192.168.18.1.33966: tcp 0
....E..<..@.=...........u5......K3.................
.g.t"`......
15:18:03.634269 IP 192.168.18.1.33966 > 192.168.20.220.30005: tcp 0
....E..4..@.@.............u5K3.........s.T.....
"`...g.t
15:18:03.735485 IP 192.168.18.1.33966 > 192.168.20.220.30005: tcp 290
....E..V..@.@.............u5K3.........s.v.....
"`...g.tGET / HTTP/1.1
Host: 192.168.20.220:30005
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:27.0) Gecko/20100101 Firefox/27.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
Connection: keep-alive


15:18:03.753943 IP 192.168.20.220.30005 > 192.168.18.1.33966: tcp 0
X........c@.=..2........u5......K3.1..
.g.."`..
15:18:03.762129 IP 192.168.20.220.30005 > 192.168.18.1.33966: tcp 228
X........d@.=..M........u5......K3.1..
.g.."`..HTTP/1.1 401 Unauthorized
Content-Length: 0
WWW-Authenticate: Digest realm="IgdAuthentication", domain="/", nonce="ZDE4NTY3ZmM6NmYyMzA3NjM6YmQ5NGY3YTA=", qop="auth", algorithm=MD5, opaque="5ccc09c403ebaf9f0171e9517f40e41" 


15:18:03.762172 IP 192.168.18.1.33966 > 192.168.20.220.30005: tcp 0
....E..4..@.@.............u5K3.1.......{.T.....
"`...g..
15:18:06.215945 IP 192.168.18.1.33966 > 192.168.20.220.30005: tcp 564
....E..h..@.@.............u5K3.1.......{.......
"`...g..GET / HTTP/1.1
Host: 192.168.20.220:30005
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:27.0) Gecko/20100101 Firefox/27.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
Connection: keep-alive
Authorization: Digest username="admin", realm="IgdAuthentication", nonce="ZDE4NTY3ZmM6NmYyMzA3NjM6YmQ5NGY3YTA=", uri="/", algorithm=MD5, response="ae43f4fcaf71340f9c360877dad87c66", opaque="5ccc09c403ebaf9f0171e9517f40e41", qop=auth, nc=00000001, cnonce="9d1ea29022ec08d6"


15:18:06.244925 IP 192.168.20.220.30005 > 192.168.18.1.33966: tcp 38
....E..Z.e@.=..
........u5......K3.e.....Q.....
.g.."`..HTTP/1.1 200 OK
Content-Length: 0

The second is from my code which fails:

15:19:08.589647 IP 192.168.18.1.33972 > 192.168.20.220.30005: tcp 0
....E..<..@.@.............u5a.........9..\.........
"`A.........
15:19:08.608304 IP 192.168.20.220.30005 > 192.168.18.1.33972: tcp 0
....E..<..@.=...........u5....#<a.......aN.........
.h.<"`A.....
15:19:08.608333 IP 192.168.18.1.33972 > 192.168.20.220.30005: tcp 0
....E..4..@.@.............u5a.....#=...s.T.....
"`A..h.<
15:19:08.608872 IP 192.168.18.1.33972 > 192.168.20.220.30005: tcp 70
....E..z..@.@.............u5a.....#=...s.......
"`A..h.<GET / HTTP/1.1
Host: 192.168.20.220:30005
Connection: keep-alive


15:19:08.626556 IP 192.168.20.220.30005 > 192.168.18.1.33972: tcp 0
....E..4.r@.=..#........u5....#=a......@.......
.h.O"`A.
15:19:08.631951 IP 192.168.20.220.30005 > 192.168.18.1.33972: tcp 228
....E....s@.=..>........u5....#=a......@A......
.h.Q"`A.HTTP/1.1 401 Unauthorized
Content-Length: 0
WWW-Authenticate: Digest realm="IgdAuthentication", domain="/", nonce="YmM4ZWY0YjE6MWY4ZjVkMmQ6IGIwNjdkZWI=", qop="auth", algorithm=MD5, opaque="5ccc09c403ebaf9f0171e9517f40e41" 


15:19:08.631966 IP 192.168.18.1.33972 > 192.168.20.220.30005: tcp 0
....E..4..@.@.............u5a.....$!...{.T.....
"`A".h.Q
15:19:08.634442 IP 192.168.18.1.33973 > 192.168.20.220.30005: tcp 0
....E..<..@.@.
...........u5...$......9..\.........
"`A#........
15:19:08.653166 IP 192.168.20.220.30005 > 192.168.18.1.33973: tcp 0
....E..<..@.=...........u5....~w...%....3..........
.h.i"`A#....
15:19:08.653201 IP 192.168.18.1.33973 > 192.168.20.220.30005: tcp 0
....E..4..@.@.
...........u5...%..~x...s.T.....
"`A'.h.i
15:19:08.653534 IP 192.168.18.1.33973 > 192.168.20.220.30005: tcp 524
....E..@.   @.@.............u5...%..~x...s.`.....
"`A(.h.iGET / HTTP/1.1
Authorization: Digest username="admin", realm="IgdAuthentication", nonce="YmM4ZWY0YjE6MWY4ZjVkMmQ6IGIwNjdkZWI=", uri="/", algorithm=MD5, response="1d0539755e0e2ca204a9821027041e8b", qop=auth, nc=00000001, cnonce="MjMwMjkw", opaque="5ccc09c403ebaf9f0171e9517f40e41"
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:27.0) Gecko/20100101 Firefox/27.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: en-US,en;q=0.5
Host: 192.168.20.220:30005
Connection: keep-alive


15:19:08.672345 IP 192.168.20.220.30005 > 192.168.18.1.33973: tcp 0
Xi........@.=...........u5....~x...1..
.h.|"`A(
15:19:10.633047 IP 192.168.18.1.33972 > 192.168.20.220.30005: tcp 0
....E..4..@.@.............u5a.....$!...{.T.....
"`C..h.Q
15:19:10.651962 IP 192.168.20.220.30005 > 192.168.18.1.33972: tcp 0
....E..4.t@.=..!........u5....$!a......@.&.....
.h.8"`C.
15:19:10.651998 IP 192.168.18.1.33972 > 192.168.20.220.30005: tcp 0
....E..4..@.@.............u5a.....$"...{.T.....
"`C..h.8
15:19:10.653565 IP 192.168.18.1.33973 > 192.168.20.220.30005: tcp 0
....E..4.
@.@.
...........u5...1..~x...s.T.....
"`C..h.|
15:19:10.711119 IP 192.168.20.220.30005 > 192.168.18.1.33973: tcp 0
X_........@.=...........u5....~x...2..
.h.s"`C.
15:19:12.674799 IP 192.168.20.220.30005 > 192.168.18.1.33973: tcp 228
X.........@.=...........u5....~x...2..
.h.."`C.HTTP/1.1 401 Unauthorized
Content-Length: 0
WWW-Authenticate: Digest realm="IgdAuthentication", domain="/", nonce="YWU1ZjhkMWM6MzFmZjllMDA6YzAxNjY4MGM=", qop="auth", algorithm=MD5, opaque="5ccc09c403ebaf9f0171e9517f40e41"

What difference may there be between the two queries that is causing this?

May 31, 2022 in Node-js by Vaani
 • 7,020 points • 700 views

1 answer to this question.

0 votes

The problem is the charset output (default utf8)

So you need to convert the strreamed file from iso-8859-5 (charset of the file in gz) to utf8.

This works:

const fs = require('fs')
const request = require('request')
const zlib = require('zlib')
const iconv = require('iconv-lite');

var converterStream = iconv.decodeStream('iso-8859-5');

const out = fs.createWriteStream('out.srt');
request(`https://dl.opensubtitles.org/en/download/src-api/vrf-19ed0c61/filead/1954767944.gz`)
  .pipe(zlib.createGunzip())
  .pipe(converterStream)
  .pipe(out);
answered Jun 7, 2022 by Neha
 • 9,060 points

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