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<td style="vertical-align: top;; padding: 0; border-collapse: collapse; padding-right: 5px; font-size: 20px; line-height: 30px; mso-line-height-rule: exactly" class="page-title-pattern-header-container"> <span class="page-title-pattern-header" style="font-family: Arial, sans-serif; padding: 0; font-size: 20px; line-height: 30px; mso-text-raise: 2px; mso-line-height-rule: exactly; vertical-align: middle"> <a href="https://shibboleth.atlassian.net/browse/JOIDC-97?atlOrigin=eyJpIjoiMWQ4MDcxYTAzZDM0NDczMWI2MDczZjM4NWYzYmYwY2EiLCJwIjoiaiJ9" style="color: #3b73af; text-decoration: none">Re: support C_HASH in ID_Token also for Authorization Code Flow with PKCE</a> </span> </td>
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<td class="text-paragraph-pattern-container mobile-resize-text " style="padding: 0; border-collapse: collapse; padding: 0 0 10px"> <p style="margin: 10px 0 0; margin-top: 0">In the OIDC core spec, the _c_hash_ claim is only mentioned under the section <b>3.3. Authentication using the Hybrid Flow</b>. Over there, it’s specified that it’s required when id_token is issued from the authorization endpoint together with the authorization code. So, it clearly refers to hybrid flow only. In the sections for the authorization code flow and implicit flow (3.1 and 3.2), the claim _c_hash_ is not mentioned at all.</p> </td>
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