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fido2-net-lib https://github.com/abergs/fido2-net-lib を分析している (2018/08/29) 。
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| { | |
| "status": "ok", | |
| "errorMessage": "", | |
| "rp": { | |
| "id": "localhost", | |
| "name": "Fido2 test" | |
| }, | |
| "user": { | |
| "name": "aaa@example.com", | |
| "id": "YWFhQGV4YW1wbGUuY29t", | |
| "displayName": "Display aaa@example.com" | |
| }, | |
| "challenge": "8P0YAYk-sxYVM0Xmt7Irow", | |
| "pubKeyCredParams": [ | |
| { | |
| "type": "public-key", | |
| "alg": -7 | |
| }, | |
| { | |
| "type": "public-key", | |
| "alg": -257 | |
| } | |
| ], | |
| "timeout": 60000, | |
| "attestation": "none", | |
| "authenticatorSelection": null, | |
| "excludeCredentials": [] | |
| } |
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| { | |
| "id": "4F-FJ5PWB2MsnBYC9qBOo9DjSIyHPGeoyNJlR1Cc3LOyOygSu0HGKdvB5ln-7hIP8Cyo6s5krsKkiDxNaRu3BA", | |
| "rawId": "4F-FJ5PWB2MsnBYC9qBOo9DjSIyHPGeoyNJlR1Cc3LOyOygSu0HGKdvB5ln-7hIP8Cyo6s5krsKkiDxNaRu3BA", | |
| "type": "public-key", | |
| "response": { | |
| "AttestationObject": "o2NmbXRkbm9uZWdhdHRTdG10oGhhdXRoRGF0YVjESZYN5YgOjGh0NBcPZHZgW4_krrmihjLHmVzzuoMdl2NBAAAAAAAAAAAAAAAAAAAAAAAAAAAAQOBfhSeT1gdjLJwWAvagTqPQ40iMhzxnqMjSZUdQnNyzsjsoErtBxinbweZZ_u4SD_AsqOrOZK7CpIg8TWkbtwSlAQIDJiABIVggjXJiXxbIKez0-7iKeN9BLn9WSRUjGuBZT2KAzxuzvdYiWCAgv0KMHPO69DiXQntyKfueL2Fb9DpaEQrene0hZoaTsQ", | |
| "clientDataJson": "eyJjaGFsbGVuZ2UiOiI4UDBZQVlrLXN4WVZNMFhtdDdJcm93Iiwib3JpZ2luIjoiaHR0cHM6Ly9sb2NhbGhvc3Q6NDQzMjkiLCJ0eXBlIjoid2ViYXV0aG4uY3JlYXRlIn0" | |
| } | |
| } |
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| { | |
| "status": "ok", | |
| "errorMessage": "", | |
| "result": { | |
| "publicKey": "pQECAyYgASFYII1yYl8WyCns9Pu4injfQS5_VkkVIxrgWU9igM8bs73WIlggIL9CjBzzuvQ4l0J7cin7ni9hW_Q6WhEK3p3tIWaGk7E", | |
| "credentialId": "4F-FJ5PWB2MsnBYC9qBOo9DjSIyHPGeoyNJlR1Cc3LOyOygSu0HGKdvB5ln-7hIP8Cyo6s5krsKkiDxNaRu3BA", | |
| "user": { | |
| "name": "aaa@example.com", | |
| "id": "YWFhQGV4YW1wbGUuY29t", | |
| "displayName": "Display aaa@example.com" | |
| } | |
| } | |
| } |
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| aaa@example.com |
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| { | |
| "status": "ok", | |
| "errorMessage": "", | |
| "challenge": "TDmWbzrQ9gIHkbs6dw78mA", | |
| "timeout": 60000, | |
| "rpId": "localhost", | |
| "allowCredentials": [ | |
| { | |
| "type": "public-key", | |
| "id": "4F-FJ5PWB2MsnBYC9qBOo9DjSIyHPGeoyNJlR1Cc3LOyOygSu0HGKdvB5ln-7hIP8Cyo6s5krsKkiDxNaRu3BA", | |
| "transports": [] | |
| } | |
| ], | |
| "userVerification": "discouraged" | |
| } |
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| { | |
| "id": "4F-FJ5PWB2MsnBYC9qBOo9DjSIyHPGeoyNJlR1Cc3LOyOygSu0HGKdvB5ln-7hIP8Cyo6s5krsKkiDxNaRu3BA", | |
| "rawId": "4F-FJ5PWB2MsnBYC9qBOo9DjSIyHPGeoyNJlR1Cc3LOyOygSu0HGKdvB5ln-7hIP8Cyo6s5krsKkiDxNaRu3BA", | |
| "type": "public-key", | |
| "response": { | |
| "authenticatorData": "SZYN5YgOjGh0NBcPZHZgW4_krrmihjLHmVzzuoMdl2MBAAAAEw", | |
| "clientDataJson": "eyJjaGFsbGVuZ2UiOiJURG1XYnpyUTlnSUhrYnM2ZHc3OG1BIiwib3JpZ2luIjoiaHR0cHM6Ly9sb2NhbGhvc3Q6NDQzMjkiLCJ0eXBlIjoid2ViYXV0aG4uZ2V0In0", | |
| "signature": "MEUCIQDHjPF36rA_5LIXfUs8ZBI-HbQ68YRWa2z3tNVAWWqOPwIgMr_aeefHsqJJrCWkZwYO1h5ciU83dKGlQW8qOcbsJcU" | |
| } | |
| } |
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| { | |
| "CredentialId": "qD7spwzSO7q1W3F7r84aUud9yHq37aufS72jHaeckZfIbHHl9LNNzZwRohJjs9v7MjaiW/FiI/IImg1kZ9lGIQ==", | |
| "Counter": 21 | |
| } |
認証（Assertion）
assertionOptions WebAPI
- 引数：POST（username）
- 戻り値：navigator.credentials.get()メソッドへの引数を生成して返す。
- JavaScript
- 戻り値の一部のメンバがJavaScriptで以下のように変換される。
Uint8Array.from(atob(string.replace(/-/g, "+").replace(/_/g, "/")), c => c.charCodeAt(0))- challenge
- allowCredentials.id
- navigator.credentials.get()メソッドの引数に渡されて戻り値を受け取る。
- 戻り値の一部のメンバは、JavaScriptで変換される。
- id: 変換無し
- rawId: base64enc
- type: 変換無し
- response
- authenticatorData: base64enc
- clientDataJson: base64enc
- signature: base64enc
- 戻り値の一部のメンバがJavaScriptで以下のように変換される。
makeAssertion WebAPI
- 引数：POST（JSON）
- 処理内容：navigator.credentials.get()メソッドの戻り値の署名を公開鍵で検証して認証する。
- 戻り値：JSONを生成してはいるが、
- JavaScript
戻り値は、そのまま捨てられている。
参考
コミュニティとのやり取り
passwordless-lib/fido2-net-lib#26
W3Cの仕様の分析
- マイクロソフト系技術情報 Wiki
https://techinfoofmicrosofttech.osscons.jp/
2019/03/03
Preview版の再分析
https://gist.github.com/daisukenishino2/f09fb400fa2186aead4b6f8cad59ab38
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登録（Attestation）
makeCredentialOptions WebAPI
makeCredential WebAPI
戻り値は、そのまま捨てられている。