Removing thumbprint check from PKeyAuth challenge #1828
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melissaahn
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fadidurah
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May 22, 2023
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Please double check the failing tests. |
rpdome
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May 22, 2023
melissaahn
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May 25, 2023
### Summary In the PKeyAuth protocol, the non-interactive flow can send a [thumbprint-based certificate challenge](https://learn.microsoft.com/en-us/openspecs/windows_protocols/ms-pkap/31066cbf-2462-4cb6-b0b9-68af2f21a5d0). This thumbprint is meant to serve as a hint to the client side to cross-check the thumbprint of the current device certificate. While we have logic for this check, it currently isn't being used due to [this line always returning true](https://github.com/AzureAD/microsoft-authentication-library-common-for-android/blob/478f706bf412b3bcc754ec90152568cb23826670/common4j/src/main/com/microsoft/identity/common/java/challengehandlers/PKeyAuthChallenge.java#L148) (go into the isValidIssuer method to see why). Additionally, the thumbprint is (supposedly, based on me asking some folks) hashed with SHA-1, and we're currently working to remove most of our use of SHA-1. [The iOS team has already removed their thumbprint verification logic](AzureAD/microsoft-authentication-library-for-objc#871), so we're going to do the same. This PR removes the logic related to the PKeyAuth thumbprint. No additions are being made. ### Related PRs - Broker: AzureAD/ad-accounts-for-android#2290 - MSAL: AzureAD/microsoft-authentication-library-for-android#1828 - ADAL: AzureAD/azure-activedirectory-library-for-android#1733
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Summary
Please see the common PR for description: AzureAD/microsoft-authentication-library-common-for-android#2045