Entra External ID Login in Ionic: One Capacitor Plugin for iOS, Android and Web
Adding sign-in to a hybrid app gets painful fast when you target Microsoft Entra External ID on iOS, Android and the web at once. The browser needs a redirect flow, iOS needs Keychain set up correctly, and Android wants a signature hash written in two different encodings. I built @nativelement/capacitor-msal-entra to hide that behind four calls: signIn , acquireTokenSilent , getAccount and…
Building a single Capacitor plugin, @nativelement/capacitor-msal-entra, simplifies adding Microsoft Entra External ID sign-in to hybrid apps across iOS, Android, and web platforms. This plugin abstracts away the complexities of implementing sign-in, token acquisition, account retrieval, and sign-out functions. It wraps MSAL Android, MSAL iOS, and @azure/msal-browser to provide secure token caching and silent renewal for a seamless user experience.
The tutorial outlines critical details like the Android signature hash encoding in msal_config.json versus raw encoding in the manifest, and the critical Keychain entitlement for iOS. It also explains why the signIn() method fails on the web and how to restore the session upon app startup. The plugin also addresses the case-sensitive domainHint and provides a comprehensive table of potential issues, their causes, and solutions.
The tutorial includes an Angular auth service, guard, and HTTP interceptor, along with backend token validation.
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