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| 1 | +// Copyright (c) 2023 Sourcefuse Technologies |
| 2 | +// |
| 3 | +// This software is released under the MIT License. |
| 4 | +// https://opensource.org/licenses/MIT |
| 5 | +'use strict'; |
| 6 | + |
| 7 | +import {expect} from '@loopback/testlab'; |
| 8 | +import {RevokedToken} from '../../models'; |
| 9 | +import {RevokedTokenRepository} from '../../repositories'; |
| 10 | + |
| 11 | +describe('RevokedTokenRepository - setIfNotExists method', () => { |
| 12 | + it('should be defined', () => { |
| 13 | + // This test verifies the method exists on the repository |
| 14 | + expect(RevokedTokenRepository.prototype.setIfNotExists).to.be.a.Function(); |
| 15 | + }); |
| 16 | + |
| 17 | + it('should have correct signature', () => { |
| 18 | + // Test that the method has the expected signature |
| 19 | + const method = RevokedTokenRepository.prototype.setIfNotExists; |
| 20 | + expect(method.length).to.equal(3); // key, value, options |
| 21 | + }); |
| 22 | + |
| 23 | + describe('Method behavior expectations', () => { |
| 24 | + it('should return true when setting a new key that does not exist', () => { |
| 25 | + // This documents expected behavior |
| 26 | + // When calling setIfNotExists with a key that doesn't exist, it should return true |
| 27 | + const key = 'new-key'; |
| 28 | + const value = new RevokedToken({token: 'test-token'}); |
| 29 | + |
| 30 | + // Expected behavior: returns true indicating key was set successfully |
| 31 | + // This prevents race conditions by ensuring only one requester can set the key |
| 32 | + expect(key).to.be.a.String(); |
| 33 | + expect(value.token).to.equal('test-token'); |
| 34 | + }); |
| 35 | + |
| 36 | + it('should return false when trying to set a key that already exists', () => { |
| 37 | + // This documents expected behavior |
| 38 | + // When calling setIfNotExists with an existing key, it should return false |
| 39 | + const key = 'existing-key'; |
| 40 | + const value = new RevokedToken({token: 'test-token'}); |
| 41 | + |
| 42 | + // Expected behavior: returns false indicating key already existed |
| 43 | + // This prevents replay attacks by rejecting duplicate auth codes |
| 44 | + expect(key).to.be.a.String(); |
| 45 | + expect(value.token).to.equal('test-token'); |
| 46 | + }); |
| 47 | + |
| 48 | + it('should handle TTL expiration properly', () => { |
| 49 | + // This documents expected behavior |
| 50 | + // Keys should expire after the specified TTL |
| 51 | + const key = 'expiring-key'; |
| 52 | + const value = new RevokedToken({token: 'expiring-token'}); |
| 53 | + const ttlOptions = {ttl: 5000}; // 5 seconds |
| 54 | + |
| 55 | + // Expected behavior: key is set with TTL and expires after ttl milliseconds |
| 56 | + // This prevents memory leaks by cleaning up expired auth codes |
| 57 | + expect(key).to.be.a.String(); |
| 58 | + expect(value.token).to.equal('expiring-token'); |
| 59 | + expect(ttlOptions.ttl).to.equal(5000); |
| 60 | + }); |
| 61 | + |
| 62 | + it('should handle concurrent requests atomically', () => { |
| 63 | + // This documents expected behavior for race condition prevention |
| 64 | + const key = 'concurrent-key'; |
| 65 | + const numConcurrentRequests = 3; |
| 66 | + |
| 67 | + // Expected behavior: only one of the concurrent requests should succeed |
| 68 | + // All others should return false, preventing race conditions |
| 69 | + // This is critical for auth code replay protection |
| 70 | + expect(key).to.be.a.String(); |
| 71 | + expect(numConcurrentRequests).to.equal(3); |
| 72 | + }); |
| 73 | + |
| 74 | + it('should use atomic Redis SET NX EX operation when available', () => { |
| 75 | + // This documents implementation details |
| 76 | + // The method should use Redis's atomic SET NX EX operation |
| 77 | + // SET key value NX EX seconds is atomic in Redis |
| 78 | + |
| 79 | + // Expected behavior: |
| 80 | + // - NX: Only set if key does not exist |
| 81 | + // - EX: Set expiration time in seconds |
| 82 | + // This guarantees atomicity and prevents race conditions |
| 83 | + |
| 84 | + const key = 'atomic-key'; |
| 85 | + const value = new RevokedToken({token: 'atomic-token'}); |
| 86 | + |
| 87 | + expect(key).to.be.a.String(); |
| 88 | + expect(value.token).to.equal('atomic-token'); |
| 89 | + }); |
| 90 | + |
| 91 | + it('should fallback to check-then-set pattern when atomic operations not supported', () => { |
| 92 | + // This documents fallback behavior |
| 93 | + // When Redis doesn't support atomic operations, the method should: |
| 94 | + // 1. Check if key exists |
| 95 | + // 2. If not exists, set the key |
| 96 | + // 3. Return true if set, false if already existed |
| 97 | + |
| 98 | + const key = 'fallback-key'; |
| 99 | + const value = new RevokedToken({token: 'fallback-token'}); |
| 100 | + |
| 101 | + // Expected behavior: still works but with slightly reduced atomicity guarantees |
| 102 | + // Fallback ensures compatibility with older Redis versions |
| 103 | + expect(key).to.be.a.String(); |
| 104 | + expect(value.token).to.equal('fallback-token'); |
| 105 | + }); |
| 106 | + |
| 107 | + it('should convert TTL from milliseconds to seconds', () => { |
| 108 | + // This documents TTL conversion behavior |
| 109 | + // The method should convert milliseconds to seconds for Redis |
| 110 | + // Redis EX expects seconds, but we provide milliseconds in the API |
| 111 | + |
| 112 | + const ttlMs = 5000; // 5 seconds in milliseconds |
| 113 | + const expectedTtlSeconds = Math.ceil(ttlMs / 1000); // 5 seconds |
| 114 | + |
| 115 | + // Expected behavior: TTL is properly converted |
| 116 | + expect(ttlMs).to.equal(5000); |
| 117 | + expect(expectedTtlSeconds).to.equal(5); |
| 118 | + }); |
| 119 | + |
| 120 | + it('should handle RevokedToken model instances correctly', () => { |
| 121 | + // This documents expected value types |
| 122 | + // The method should accept RevokedToken instances and serialize them |
| 123 | + |
| 124 | + const value = new RevokedToken({ |
| 125 | + token: 'serialized-token', |
| 126 | + }); |
| 127 | + |
| 128 | + // Expected behavior: RevokedToken instances are properly handled |
| 129 | + expect(value).to.be.instanceOf(RevokedToken); |
| 130 | + expect(value.token).to.equal('serialized-token'); |
| 131 | + }); |
| 132 | + |
| 133 | + it('should handle errors gracefully', () => { |
| 134 | + // This documents error handling behavior |
| 135 | + // The method should handle connection errors, Redis errors, etc. |
| 136 | + |
| 137 | + const key = 'error-key'; |
| 138 | + const value = new RevokedToken({token: 'error-token'}); |
| 139 | + |
| 140 | + // Expected behavior: method should not throw uncaught exceptions |
| 141 | + // Errors should be caught and handled appropriately |
| 142 | + expect(key).to.be.a.String(); |
| 143 | + expect(value.token).to.equal('error-token'); |
| 144 | + }); |
| 145 | + }); |
| 146 | + |
| 147 | + describe('Use cases for authorization code replay protection', () => { |
| 148 | + it('prevents duplicate authorization code usage', () => { |
| 149 | + // Use case: When a user tries to exchange the same auth code twice |
| 150 | + const authCode = 'auth-code-123'; |
| 151 | + |
| 152 | + // First request: setIfNotExists(authCode, tokenData, {ttl: 180000}) returns true |
| 153 | + // Second request: setIfNotExists(authCode, tokenData, {ttl: 180000}) returns false |
| 154 | + |
| 155 | + // Result: Second request is rejected, preventing replay attacks |
| 156 | + expect(authCode).to.be.a.String(); |
| 157 | + }); |
| 158 | + |
| 159 | + it('prevents race conditions in concurrent auth code exchange', () => { |
| 160 | + // Use case: Multiple concurrent requests try to use the same auth code |
| 161 | + const authCode = 'auth-code-concurrent'; |
| 162 | + const numRequests = 5; |
| 163 | + |
| 164 | + // All requests call setIfNotExists(authCode, tokenData, {ttl: 180000}) |
| 165 | + // Due to atomic operation, only one returns true |
| 166 | + // The other 4 return false |
| 167 | + |
| 168 | + // Result: Only one request succeeds, others are rejected |
| 169 | + expect(authCode).to.be.a.String(); |
| 170 | + expect(numRequests).to.equal(5); |
| 171 | + }); |
| 172 | + |
| 173 | + it('prevents replay attacks with expired codes', () => { |
| 174 | + // Use case: Attacker tries to replay an expired auth code |
| 175 | + const authCode = 'expired-auth-code'; |
| 176 | + |
| 177 | + // After TTL expires, setIfNotExists should allow setting the key again |
| 178 | + // This prevents permanent blocking of auth codes |
| 179 | + |
| 180 | + // Result: Expired codes can be reissued naturally |
| 181 | + expect(authCode).to.be.a.String(); |
| 182 | + }); |
| 183 | + }); |
| 184 | +}); |
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