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Add M365 Login plugin: Microsoft Entra ID sign-in for existing users

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Adds a WordPress plugin that places a customisable "Sign in with
Microsoft" button on wp-login.php and signs existing users in via the
OpenID Connect authorization code flow with PKCE. Users are matched by
e-mail address only; no accounts are created.

Security: single-use state/nonce bound to an HttpOnly cookie, ID token
signature verification against Microsoft's JWKS (RS256 only) with
issuer/audience/tenant/expiry/nonce checks, optional tenant pinning,
account binding to the Microsoft object ID, e-mail domain allow-list,
client secret encrypted at rest (AES-256-GCM).

Admin: settings screen with connection, button and security tabs, live
button preview, colour presets, media-library icon picker, redirect URI
copy button and tenant connectivity test.

Packaging for WordPress.org: readme.txt with External services section,
GPL-2.0 license, uninstall.php, POT + German translations, .distignore,
build script, PHPCS config and CI running Plugin Check.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01JJxAHYdMfKPoN4koRc4Ci2
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friloo 2026-09-22 14:21:10 +00:00
commit 3e3e87b399
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phpcs.xml.dist Normal file
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<?xml version="1.0"?>
<ruleset name="M365 Login">
<description>WordPress Coding Standards for the M365 Login plugin.</description>
<file>.</file>
<exclude-pattern>/vendor/*</exclude-pattern>
<exclude-pattern>/node_modules/*</exclude-pattern>
<exclude-pattern>/build/*</exclude-pattern>
<exclude-pattern>/bin/*</exclude-pattern>
<arg name="extensions" value="php"/>
<arg name="colors"/>
<arg value="sp"/>
<arg name="parallel" value="8"/>
<rule ref="WordPress">
<exclude name="Generic.Commenting.DocComment.MissingShort"/>
</rule>
<rule ref="WordPress-Extra"/>
<rule ref="WordPress-Docs"/>
<config name="minimum_wp_version" value="6.0"/>
<config name="testVersion" value="7.4-"/>
<rule ref="PHPCompatibilityWP"/>
<rule ref="WordPress.WP.I18n">
<properties>
<property name="text_domain" type="array">
<element value="m365-login"/>
</property>
</properties>
</rule>
<rule ref="WordPress.NamingConventions.PrefixAllGlobals">
<properties>
<property name="prefixes" type="array">
<element value="m365_login"/>
<element value="M365_LOGIN"/>
<element value="M365_Login"/>
</property>
</properties>
</rule>
</ruleset>