providers/saml: fix invalid SAML Response when assertion and response are signed

[BeryJu]

Details

closes #12306

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Checklist

• Local tests pass (ak test authentik/)
• The code has been formatted (make lint-fix)

If an API change has been made

• The API schema has been updated (make gen-build)

If changes to the frontend have been made

• The code has been formatted (make web)

If applicable

• The documentation has been updated
• The documentation has been formatted (make website)

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[BeryJu]

/cherry-pick version-2024.12

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 92.75%. Comparing base (9d15fa4) to head (423db43).
Report is 2 commits behind head on main.

✅ All tests successful. No failed tests found.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #12611      +/-   ##
==========================================
- Coverage   92.76%   92.75%   -0.01%     
==========================================
  Files         769      769              
  Lines       38828    38840      +12     
==========================================
+ Hits        36017    36026       +9     
- Misses       2811     2814       +3     

Flag	Coverage Δ
e2e	48.58% <15.38%> (-0.07%)	⬇️
integration	24.63% <0.00%> (-0.01%)	⬇️
unit	90.39% <100.00%> (+<0.01%)	⬆️

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[github-actions]

authentik PR Installation instructions

Instructions for docker-compose

Add the following block to your .env file:

AUTHENTIK_IMAGE=ghcr.io/goauthentik/dev-server
AUTHENTIK_TAG=gh-423db43052846b81c1024d80146ce49036074e5d
AUTHENTIK_OUTPOSTS__CONTAINER_IMAGE_BASE=ghcr.io/goauthentik/dev-%(type)s:gh-%(build_hash)s

For arm64, use these values:

AUTHENTIK_IMAGE=ghcr.io/goauthentik/dev-server
AUTHENTIK_TAG=gh-423db43052846b81c1024d80146ce49036074e5d-arm64
AUTHENTIK_OUTPOSTS__CONTAINER_IMAGE_BASE=ghcr.io/goauthentik/dev-%(type)s:gh-%(build_hash)s

Afterwards, run the upgrade commands from the latest release notes.

Instructions for Kubernetes

Add the following block to your values.yml file:

authentik:
    outposts:
        container_image_base: ghcr.io/goauthentik/dev-%(type)s:gh-%(build_hash)s
global:
    image:
        repository: ghcr.io/goauthentik/dev-server
        tag: gh-423db43052846b81c1024d80146ce49036074e5d

For arm64, use these values:

authentik:
    outposts:
        container_image_base: ghcr.io/goauthentik/dev-%(type)s:gh-%(build_hash)s
global:
    image:
        repository: ghcr.io/goauthentik/dev-server
        tag: gh-423db43052846b81c1024d80146ce49036074e5d-arm64

Afterwards, run the upgrade commands from the latest release notes.