Fix bug with managing redirection and keepAuthorization in Web cmdlets by CarloToso · Pull Request #18902 · PowerShell/PowerShell

CarloToso · 2023-01-07T15:30:54Z

PR Summary

The current behaviour of if (keepAuthorization && IsRedirectCode(response.StatusCode) && response.Headers.Location is not null) is wrong, I tested it by setting keepAuthorization = true --> this sets handleRetirect = true --> and then sets handler.AllowAutoRedirect = false. Without sessionRedirect (we can choose a better name) it ignores the MaximumRedirection parameter.

Test: maunally set keepAuthorization = true before the if, then
Invoke-WebRequest "http://mockbin.org/redirect/308?to=https://mockbin.org/redirect/302?to=https://mockbin.org/status/200" -MaximumRedirection 0 -SkipHttpErrorCheck --> expected 308, result 200

Proposed fix -->

bool sessionRedirect = WebSession.MaximumRedirection > 0 || WebSession.MaximumRedirection == -1;
if (keepAuthorization  && sessionRedirect && IsRedirectCode(response.StatusCode) && response.Headers.Location is not null)

PR Context

Fix Bug, merge before #18546 and #18894

iSazonov · 2023-01-07T17:56:29Z

@CarloToso Can you enhance our helper test tool - WebListener - to cover the scenario? Currently it supports redirection but not take into account authorization header (I guess we could use -Authentication Bear?). WebListener could return the auth token as-is and we could add tests to check that the header is removed by default and isn't removed with PreserveAuthorizationOnRedirect.

I see only reason we do custom redirection processing is that we want to keep the auth header. So I suggest rename keepAuthorization and handleRedirect parameters to keepAuthorizationOnRedirect. This simplify understanding the code.

CarloToso · 2023-01-07T18:14:02Z

@iSazonov we also need to handle redirection for #18546 and #18894, I can change keepAuthorization to keepAuthorizationOnRedirect but i think handleRedirect should stay as it is.

I don't know much about the helper tool test but I can look into it

iSazonov · 2023-01-07T19:20:04Z

but i think handleRedirect should stay as it is.

It is the same as keepAuthorization - we assign keepAuthorization to handleRedirect - this mislead.

...t.PowerShell.Commands.Utility/commands/utility/WebCmdlet/Common/WebRequestPSCmdlet.Common.cs

…Cmdlet/Common/WebRequestPSCmdlet.Common.cs Co-authored-by: xtqqczze <45661989+xtqqczze@users.noreply.github.com>

CarloToso · 2023-01-08T01:28:38Z

If we change it handleRedirect to keepAuthorization, it will be misleading after we add -PreserveHTTPMethodOnRedirect or -AllowInsicureRedirect. We could add something like this bool handleRedirect = keepAuthorizationOnRedirect || AllowInsicureRedirect || PreserveHTTPMethodOnRedirect

iSazonov · 2023-01-08T06:47:27Z

If we change it handleRedirect to keepAuthorization, it will be misleading after we add -PreserveHTTPMethodOnRedirect or -AllowInsicureRedirect. We could add something like this bool handleRedirect = keepAuthorizationOnRedirect || AllowInsicureRedirect || PreserveHTTPMethodOnRedirect

I don't see a problem here. As I said only reason we do manual redirect processing is that we want to keep auth header. So variable names should reflect to our intention. And comments could be updated too.

iSazonov · 2023-01-08T06:48:58Z

...t.PowerShell.Commands.Utility/commands/utility/WebCmdlet/Common/WebRequestPSCmdlet.Common.cs


            // Resume requires OutFile.
-            if (Resume.IsPresent && OutFile is null)
+            if (Resume && OutFile is null)


This reduces readability. 😕

CarloToso · 2023-01-10T22:39:56Z

@iSazonov It looks like there already are some tests that cover -PreserveAuthorizationOnRedirect

iSazonov · 2023-01-11T09:46:19Z

@iSazonov It looks like there already are some tests that cover -PreserveAuthorizationOnRedirect

Can you point these tests? I see there is Authorization controller but it doesn't cover redirection scenario.

CarloToso · 2023-01-11T12:17:38Z

@iSazonov I found the -PreserveAuthorizationOnRedirect parameter in WebCmdlet.Tests.ps1 and I think it covers this case

iSazonov · 2023-01-11T12:24:26Z

If the test is passed before the PR it is a broken test.

CarloToso · 2023-01-11T18:31:52Z

I think the tests are not broken, they just never checked for -MaximumRedirection + -PreserveAuthorizationOnRedirect

iSazonov

Please confirm that the new tests fail before the PR.

...t.PowerShell.Commands.Utility/commands/utility/WebCmdlet/Common/WebRequestPSCmdlet.Common.cs

test/powershell/Modules/Microsoft.PowerShell.Utility/WebCmdlets.Tests.ps1

...t.PowerShell.Commands.Utility/commands/utility/WebCmdlet/Common/WebRequestPSCmdlet.Common.cs

iSazonov · 2023-01-12T10:48:51Z

@CarloToso Please resolve merge conflicts.

iSazonov · 2023-01-12T12:10:02Z

@CarloToso Please resolve merge conflict again.

iSazonov · 2023-01-12T17:04:21Z

...t.PowerShell.Commands.Utility/commands/utility/WebCmdlet/Common/WebRequestPSCmdlet.Common.cs

+                bool keepAuthorizationOnRedirect = WebSession is not null
+                                                   && WebSession.Headers is not null
+                                                   && PreserveAuthorizationOnRedirect.IsPresent
+                                                   && WebSession.Headers.ContainsKey(HttpKnownHeaderNames.Authorization);
+


It seems PreserveAuthorizationOnRedirect.IsPresent should be on first place.

iSazonov · 2023-01-12T17:42:27Z

...t.PowerShell.Commands.Utility/commands/utility/WebCmdlet/Common/WebRequestPSCmdlet.Common.cs

+                if (handleRedirect
+                    && WebSession.MaximumRedirection is not 0
+                    && IsRedirectCode(response.StatusCode)
+                    && response.Headers.Location is not null)


Why is AllowInsecureRedirect removed?

We merged #18546 without tests. Time to add tests for AllowInsecureRedirect

Added some tests #18939, AllowInsecureRedirect is in handleRedirect after this PR (line 1422)

iSazonov · 2023-01-13T12:38:41Z

/rebase

iSazonov · 2023-01-13T12:45:46Z

@CarloToso Please rebase to get tests.

…Redirection

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This PR has 47 quantified lines of changes. In general, a change size of upto 200 lines is ideal for the best PR experience!

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ghost · 2023-03-14T22:27:46Z

🎉v7.4.0-preview.2 has been released which incorporates this pull request.:tada:

Handy links:

Release Notes

fix bug with managing redirection

4ad575b

CarloToso requested a review from PaulHigin as a code owner January 7, 2023 15:30

pull-request-quantifier-deprecated bot added the Extra Small label Jan 7, 2023

ghost assigned adityapatwardhan Jan 7, 2023

iSazonov requested a review from adityapatwardhan January 7, 2023 17:15

iSazonov added the CL-General Indicates that a PR should be marked as a general cmdlet change in the Change Log label Jan 7, 2023

xtqqczze reviewed Jan 7, 2023

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...t.PowerShell.Commands.Utility/commands/utility/WebCmdlet/Common/WebRequestPSCmdlet.Common.cs Outdated Show resolved Hide resolved

CarloToso and others added 5 commits January 8, 2023 00:48

Update src/Microsoft.PowerShell.Commands.Utility/commands/utility/Web…

a1671df

…Cmdlet/Common/WebRequestPSCmdlet.Common.cs Co-authored-by: xtqqczze <45661989+xtqqczze@users.noreply.github.com>

keepAuthorization --> keepAuthorizationOnRedirect

8510729

remove useless IsPresent

e378ef2

missed two keepAuthorizationOnRedirect

2a9f147

bool handleRedirect = keepAuthorizationOnRedirect

f5b6d1d

better handleRedirect if logic

e48bd39

iSazonov reviewed Jan 8, 2023

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CarloToso added 2 commits January 8, 2023 13:12

revert Resume.IsPresent

1345784

keepAuthorizationOnRedirect --> handleRedirect

3ed7bd7

CarloToso mentioned this pull request Jan 8, 2023

Add PreserveHttpMethodOnRedirect switch to Web cmdlets #18894

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22 tasks

iSazonov changed the title ~~fix bug with managing redirection~~ Fix bug with managing redirection Jan 9, 2023

add test

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...t.PowerShell.Commands.Utility/commands/utility/WebCmdlet/Common/WebRequestPSCmdlet.Common.cs Outdated Show resolved Hide resolved

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ghost added the Waiting on Author The PR was reviewed and requires changes or comments from the author before being accept label Jan 12, 2023

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ghost removed the Waiting on Author The PR was reviewed and requires changes or comments from the author before being accept label Jan 12, 2023

Merge branch 'master' into Fix-handleRedirect-with-MaximumRedirection

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Merge branch 'master' into Fix-handleRedirect-with-MaximumRedirection

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CarloToso added 2 commits January 12, 2023 18:12

reorder keepAuthorizationOnRedirect

2771457

fix error

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CarloToso mentioned this pull request Jan 13, 2023

Add tests for Allowinsecureredirect parameter in Web cmdlets #18939

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Merge branch 'PowerShell:master' into Fix-handleRedirect-with-Maximum…

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…Redirection

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iSazonov assigned iSazonov and unassigned adityapatwardhan Jan 13, 2023

iSazonov changed the title ~~Fix bug with managing redirection~~ Fix bug with managing redirection and keepAuthorization in Web cmdlets Jan 13, 2023

iSazonov merged commit 282fc5f into PowerShell:master Jan 13, 2023

CarloToso deleted the Fix-handleRedirect-with-MaximumRedirection branch January 13, 2023 14:16

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