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| 1 | +import * as assert from 'assert'; |
| 2 | +import * as sinon from 'sinon'; |
| 3 | +import { derivePasskeyPrfKey } from '../../../../src/bitgo/passkey/derivePasskeyPrfKey'; |
| 4 | + |
| 5 | +describe('derivePasskeyPrfKey', function () { |
| 6 | + const mockDevices = [ |
| 7 | + { |
| 8 | + otpDeviceId: 'device-1', |
| 9 | + authenticatorInfo: { credID: 'cred-aaa', fmt: 'none' as const, publicKey: 'pk-1' }, |
| 10 | + prfSalt: 'salt-aaa', |
| 11 | + encryptedPrv: 'enc-prv-1', |
| 12 | + }, |
| 13 | + { |
| 14 | + otpDeviceId: 'device-2', |
| 15 | + authenticatorInfo: { credID: 'cred-bbb', fmt: 'none' as const, publicKey: 'pk-2' }, |
| 16 | + prfSalt: 'salt-bbb', |
| 17 | + encryptedPrv: 'enc-prv-2', |
| 18 | + }, |
| 19 | + ]; |
| 20 | + |
| 21 | + function makeWallet(devices: typeof mockDevices | undefined) { |
| 22 | + return { |
| 23 | + getEncryptedUserKeychain: sinon.stub().resolves({ |
| 24 | + id: 'keychain-id', |
| 25 | + pub: 'xpub123', |
| 26 | + encryptedPrv: 'encrypted-prv', |
| 27 | + type: 'independent', |
| 28 | + webauthnDevices: devices, |
| 29 | + }), |
| 30 | + }; |
| 31 | + } |
| 32 | + |
| 33 | + afterEach(function () { |
| 34 | + sinon.restore(); |
| 35 | + }); |
| 36 | + |
| 37 | + it('should return a hex string on happy path', async function () { |
| 38 | + const prfResult = new Uint8Array([0xde, 0xad, 0xbe, 0xef]).buffer; |
| 39 | + |
| 40 | + const mockProvider = { |
| 41 | + create: sinon.stub(), |
| 42 | + get: sinon.stub().resolves({ |
| 43 | + prfResult, |
| 44 | + credentialId: 'cred-aaa', |
| 45 | + otpCode: 'otp-123', |
| 46 | + }), |
| 47 | + }; |
| 48 | + |
| 49 | + const wallet = makeWallet(mockDevices); |
| 50 | + |
| 51 | + const result = await derivePasskeyPrfKey({ |
| 52 | + bitgo: {} as any, |
| 53 | + wallet: wallet as any, |
| 54 | + provider: mockProvider, |
| 55 | + }); |
| 56 | + |
| 57 | + // derivePassword converts ArrayBuffer to hex |
| 58 | + assert.strictEqual(result, 'deadbeef'); |
| 59 | + assert.ok(mockProvider.get.calledOnce); |
| 60 | + // Verify evalByCredential was passed |
| 61 | + const getCallArgs = mockProvider.get.firstCall.args[0]; |
| 62 | + assert.strictEqual(getCallArgs.evalByCredential['cred-aaa'], 'salt-aaa'); |
| 63 | + assert.strictEqual(getCallArgs.evalByCredential['cred-bbb'], 'salt-bbb'); |
| 64 | + }); |
| 65 | + |
| 66 | + it("should throw 'No passkey devices available' when no devices", async function () { |
| 67 | + const wallet = makeWallet(undefined); |
| 68 | + const mockProvider = { create: sinon.stub(), get: sinon.stub() }; |
| 69 | + |
| 70 | + await assert.rejects( |
| 71 | + () => derivePasskeyPrfKey({ bitgo: {} as any, wallet: wallet as any, provider: mockProvider }), |
| 72 | + (err: Error) => { |
| 73 | + assert.strictEqual(err.message, 'No passkey devices available'); |
| 74 | + return true; |
| 75 | + } |
| 76 | + ); |
| 77 | + }); |
| 78 | + |
| 79 | + it("should throw 'No passkey devices available' when devices array is empty", async function () { |
| 80 | + const wallet = makeWallet([] as any); |
| 81 | + const mockProvider = { create: sinon.stub(), get: sinon.stub() }; |
| 82 | + |
| 83 | + await assert.rejects( |
| 84 | + () => derivePasskeyPrfKey({ bitgo: {} as any, wallet: wallet as any, provider: mockProvider }), |
| 85 | + (err: Error) => { |
| 86 | + assert.strictEqual(err.message, 'No passkey devices available'); |
| 87 | + return true; |
| 88 | + } |
| 89 | + ); |
| 90 | + }); |
| 91 | + |
| 92 | + it("should throw 'No passkey devices available with a valid PRF salt' when no device has prfSalt", async function () { |
| 93 | + const devicesWithoutSalt = [ |
| 94 | + { |
| 95 | + otpDeviceId: 'device-1', |
| 96 | + authenticatorInfo: { credID: 'cred-aaa', fmt: 'none' as const, publicKey: 'pk-1' }, |
| 97 | + prfSalt: '', // empty — buildEvalByCredential skips falsy prfSalt |
| 98 | + encryptedPrv: 'enc-prv-1', |
| 99 | + }, |
| 100 | + ]; |
| 101 | + |
| 102 | + const wallet = makeWallet(devicesWithoutSalt as any); |
| 103 | + const mockProvider = { create: sinon.stub(), get: sinon.stub() }; |
| 104 | + |
| 105 | + await assert.rejects( |
| 106 | + () => derivePasskeyPrfKey({ bitgo: {} as any, wallet: wallet as any, provider: mockProvider }), |
| 107 | + (err: Error) => { |
| 108 | + assert.strictEqual(err.message, 'No passkey devices available with a valid PRF salt'); |
| 109 | + return true; |
| 110 | + } |
| 111 | + ); |
| 112 | + }); |
| 113 | + |
| 114 | + it("should throw 'Could not identify which passkey device was used' when credentialId not found", async function () { |
| 115 | + const mockProvider = { |
| 116 | + create: sinon.stub(), |
| 117 | + get: sinon.stub().resolves({ |
| 118 | + prfResult: new ArrayBuffer(32), |
| 119 | + credentialId: 'unknown-cred-id', |
| 120 | + otpCode: 'otp-123', |
| 121 | + }), |
| 122 | + }; |
| 123 | + |
| 124 | + const wallet = makeWallet(mockDevices); |
| 125 | + |
| 126 | + await assert.rejects( |
| 127 | + () => derivePasskeyPrfKey({ bitgo: {} as any, wallet: wallet as any, provider: mockProvider }), |
| 128 | + (err: Error) => { |
| 129 | + assert.strictEqual(err.message, 'Could not identify which passkey device was used'); |
| 130 | + return true; |
| 131 | + } |
| 132 | + ); |
| 133 | + }); |
| 134 | +}); |
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