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OIDC: Skip nonce for mobile flow to fix app login

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Some IdPs (e.g. Authentik) don't echo the nonce in the id_token for
the authorization code flow, causing "nonce mismatch, got: undefined"
errors when the mobile app attempts SSO login. The mobile flow already
uses PKCE which provides equivalent replay protection, so nonce is not
needed. Web flow continues to use nonce for defense-in-depth.
This commit is contained in:
Denis Arnst 2026-02-13 12:31:31 +01:00
parent 67f8eb6815
commit a6848065e1
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2 changed files with 7 additions and 7 deletions
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8
test/server/auth/OidcAuthStrategy.test.js
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@ -693,8 +693,8 @@ describe('OidcAuthStrategy', function () {
sinon.stub(strategy, 'verifyUser').resolves(mockUser)
// Pre-populate Map as if getAuthorizationUrl stored mobile session
// Note: mobile flow does not use nonce (relies on PKCE instead)
strategy.openIdAuthSession.set('mobile-state', {
nonce: 'mobile-nonce',
sso_redirect_uri: 'http://localhost/auth/openid/mobile-redirect',
mobile_redirect_uri: 'audiobookshelf://oauth'
})
@ -711,9 +711,9 @@ describe('OidcAuthStrategy', function () {
// Should delete the Map entry after use
expect(strategy.openIdAuthSession.has('mobile-state')).to.be.false
// Should use mobile nonce and code_verifier from query
// Should use code_verifier from query; nonce is undefined for mobile flow
const [, , checks] = mockClient.callback.firstCall.args
expect(checks.nonce).to.equal('mobile-nonce')
expect(checks.nonce).to.be.undefined
expect(checks.code_verifier).to.equal('mobile-verifier')
})
@ -965,7 +965,7 @@ describe('OidcAuthStrategy', function () {
expect(strategy.openIdAuthSession.has('mob-state')).to.be.true
const stored = strategy.openIdAuthSession.get('mob-state')
expect(stored.mobile_redirect_uri).to.equal('audiobookshelf://oauth')
expect(stored.nonce).to.equal('mock-nonce')
expect(stored.nonce).to.be.undefined
expect(stored.sso_redirect_uri).to.include('/auth/openid/mobile-redirect')
})