Class: WebAuthn::FakeAuthenticator

Inherits:
Object
  • Object
show all
Defined in:
lib/webauthn/fake_authenticator.rb,
lib/webauthn/fake_authenticator/attestation_object.rb,
lib/webauthn/fake_authenticator/authenticator_data.rb

Defined Under Namespace

Classes: AttestationObject, AuthenticatorData

Instance Method Summary collapse

Constructor Details

#initializeFakeAuthenticator

Returns a new instance of FakeAuthenticator.



11
12
13
# File 'lib/webauthn/fake_authenticator.rb', line 11

def initialize
  @credentials = {}
end

Instance Method Details

#get_assertion(rp_id:, client_data_hash:, user_present: true, user_verified: false, backup_eligibility: false, backup_state: false, aaguid: AuthenticatorData::AAGUID, sign_count: nil, extensions: nil, allow_credentials: nil) ⇒ Object



50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
# File 'lib/webauthn/fake_authenticator.rb', line 50

def get_assertion(
  rp_id:,
  client_data_hash:,
  user_present: true,
  user_verified: false,
  backup_eligibility: false,
  backup_state: false,
  aaguid: AuthenticatorData::AAGUID,
  sign_count: nil,
  extensions: nil,
  allow_credentials: nil
)
  credential_options = credentials[rp_id]

  if credential_options
    allow_credentials ||= credential_options.keys
    credential_id = (credential_options.keys & allow_credentials).first
    unless credential_id
      raise "No matching credentials (allowed=#{allow_credentials}) " \
            "found for RP #{rp_id} among credentials=#{credential_options}"
    end

    credential = credential_options[credential_id]
    credential_key = credential[:credential_key]
    credential_sign_count = credential[:sign_count]

    authenticator_data = AuthenticatorData.new(
      rp_id_hash: hashed(rp_id),
      user_present: user_present,
      user_verified: user_verified,
      backup_eligibility: backup_eligibility,
      backup_state: backup_state,
      aaguid: aaguid,
      credential: nil,
      sign_count: sign_count || credential_sign_count,
      extensions: extensions
    ).serialize

    signature = credential_key.sign("SHA256", authenticator_data + client_data_hash)
    credential[:sign_count] += 1

    {
      credential_id: credential_id,
      authenticator_data: authenticator_data,
      signature: signature
    }
  else
    raise "No credentials found for RP #{rp_id}"
  end
end

#make_credential(rp_id:, client_data_hash:, user_present: true, user_verified: false, backup_eligibility: false, backup_state: false, attested_credential_data: true, sign_count: nil, extensions: nil) ⇒ Object



15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
# File 'lib/webauthn/fake_authenticator.rb', line 15

def make_credential(
  rp_id:,
  client_data_hash:,
  user_present: true,
  user_verified: false,
  backup_eligibility: false,
  backup_state: false,
  attested_credential_data: true,
  sign_count: nil,
  extensions: nil
)
  credential_id, credential_key, credential_sign_count = new_credential
  sign_count ||= credential_sign_count

  credentials[rp_id] ||= {}
  credentials[rp_id][credential_id] = {
    credential_key: credential_key,
    sign_count: sign_count + 1
  }

  AttestationObject.new(
    client_data_hash: client_data_hash,
    rp_id_hash: hashed(rp_id),
    credential_id: credential_id,
    credential_key: credential_key,
    user_present: user_present,
    user_verified: user_verified,
    backup_eligibility: backup_eligibility,
    backup_state: backup_state,
    attested_credential_data: attested_credential_data,
    sign_count: sign_count,
    extensions: extensions
  ).serialize
end