WebAuthn Response Decoder #8
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| Preview URL: | https://38bad63e.tools-passkeys-dev.pages.dev |
| Branch Preview URL: | https://mm-feat-decode-response.tools-passkeys-dev.pages.dev |
MasterKale
commented
Jan 17, 2026
Comment on lines
+40
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+64
| // DEBUG - Registration | ||
| setTimeout(() => { | ||
| flask.updateCode(`{ | ||
| "id": "0PjLmk8beadc6I1u5bMrZv6rg0JlTfkp", | ||
| "rawId": "0PjLmk8beadc6I1u5bMrZv6rg0JlTfkp", | ||
| "response": { | ||
| "attestationObject": "o2NmbXRkbm9uZWdhdHRTdG10oGhhdXRoRGF0YVicdKbqkhPJnC90siSSsyDPQCYqlMGpUKA5fyklC2CEHvBdAAAAALraVWanqkAfvZZFYZpVEg0AGND4y5pPG3mnXOiNbuWzK2b-q4NCZU35KaUBAgMmIAEhWCBqFugix1y1gg-sUzr8JhsvI-b8Dc5lAUSqlLL4vKTcziJYIE-InBmgUVIpTbCN2D_h5UYzWhA7wJlP0a5CAYdSkb4Q", | ||
| "clientDataJSON": "eyJ0eXBlIjoid2ViYXV0aG4uY3JlYXRlIiwiY2hhbGxlbmdlIjoiMVVlLWZCZXkyR3p3QXQteU9LRWROUUloYXV1Vmw1QkRFcy1lLWZqUEdfTlBmU2ZIT0YwQUJ0LWQ1SG1UaWJhSV82SkZ1cHQ1bmp3dmNxWTVNSmpNdGciLCJvcmlnaW4iOiJodHRwczovL3dlYmF1dGhuLmlvIiwiY3Jvc3NPcmlnaW4iOmZhbHNlfQ", | ||
| "transports": [ | ||
| "internal", | ||
| "hybrid" | ||
| ], | ||
| "publicKeyAlgorithm": -7, | ||
| "publicKey": "MFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAEahboIsdctYIPrFM6_CYbLyPm_A3OZQFEqpSy-Lyk3M5PiJwZoFFSKU2wjdg_4eVGM1oQO8CZT9GuQgGHUpG-EA", | ||
| "authenticatorData": "dKbqkhPJnC90siSSsyDPQCYqlMGpUKA5fyklC2CEHvBdAAAAALraVWanqkAfvZZFYZpVEg0AGND4y5pPG3mnXOiNbuWzK2b-q4NCZU35KaUBAgMmIAEhWCBqFugix1y1gg-sUzr8JhsvI-b8Dc5lAUSqlLL4vKTcziJYIE-InBmgUVIpTbCN2D_h5UYzWhA7wJlP0a5CAYdSkb4Q" | ||
| }, | ||
| "type": "public-key", | ||
| "clientExtensionResults": { | ||
| "credProps": { | ||
| "rk": true | ||
| } | ||
| }, | ||
| "authenticatorAttachment": "platform" | ||
| }`); | ||
| }, 10); |
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MasterKale
commented
Jan 17, 2026
| } | ||
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| /** | ||
| * |
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This PR adds a WebAuthn response decoder that is capable of parsing both registration and authentication responses into a more human-readable representation.
(I ported over https://debugger.simplewebauthn.dev to here and made it VanillaJS)
I vendored some deps to try and reduce this project's reliance on sites like unpkg.com. I used importmaps for the deps that would support it, but for the ones that don't have ESM builds available I want to try and find more modern libraries that will support this.
TODO
json-viewer(pick a theme from https://pfau-software.de/json-viewer/demo/ first)Screenshots
Initial State
Registration
Authentication