[Bug] Incorrectly Encoded JWK Format in RSA Public Key Export

[gladjohn]

Library version used

pre release

.NET version

A recent pre-release regression was introduced in the RSA public key export function, leading to improperly encoded JSON Web Key (JWK) parameters.

Scenario

ConfidentialClient - service to service (AcquireTokenForClient)

Is this a new or an existing app?

This is a new app or experiment

Issue description and reproduction steps

• Export an in memory key.
• Observe the generated JWK string.
• Attempt to use the JWK in cryptographic operations or with external systems expecting a correctly formatted JWK.

Relevant code snippets

No response

Expected behavior

correct JWK expected that matches that one used in token validation

Identity provider

Microsoft Entra ID (Work and School accounts and Personal Microsoft accounts)

Regression

pre-release

Solution and workarounds

No response