From 6b85401d5c6b5ad449489f36867a9868b2a90227 Mon Sep 17 00:00:00 2001 From: hailin Date: Mon, 8 Dec 2025 09:02:24 -0800 Subject: [PATCH] fix(mnemonic): fix recovery-by-mnemonic using hash verification instead of address matching MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit ## Problem MPC wallet addresses have no cryptographic relationship with recovery mnemonics, so address-based verification always failed for account recovery. ## Solution Changed mnemonic verification from address matching to hash-based verification: - Mnemonic acts as identity credential, verified by hash stored in blockchain-service - Uses accountSequence to lookup stored mnemonic hash for verification ## Changes ### blockchain-service - recovery-mnemonic.adapter.ts: - generateMnemonic() now async, uses bcrypt (rounds=12) for secure hashing - verifyMnemonic() now async, supports both bcrypt and legacy SHA256 hashes - Added backward compatibility for existing SHA256 hashed mnemonics - mnemonic-verification.service.ts: - await verifyMnemonic() for async bcrypt comparison - address-derivation.service.ts: - await generateMnemonic() for async bcrypt hashing - package.json: added bcrypt dependency ### identity-service - user-application.service.ts: - Changed recoverByMnemonic() to use verifyMnemonicByAccount (hash verification) - Added rate limiting: 5 failed attempts per hour per accountSequence - Uses Redis to track failed verification attempts - redis.service.ts: - Added incr() and expire() methods for rate limiting - Added updateKeygenStatusAtomic() with Lua script for atomic state transitions - mpc-keygen-completed.handler.ts: - Uses atomic Redis update to prevent race conditions - blockchain-wallet.handler.ts: - Uses atomic Redis update for completed status ## Security Improvements - bcrypt with 12 rounds for mnemonic hashing (anti-brute-force) - Rate limiting prevents brute force attacks on mnemonic recovery - Atomic Redis operations prevent race conditions in wallet creation flow 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude --- .../blockchain-service/package-lock.json | 83 +++++++++++++++++-- .../services/blockchain-service/package.json | 2 + .../services/address-derivation.service.ts | 28 +++++-- .../services/mnemonic-verification.service.ts | 4 +- .../blockchain/recovery-mnemonic.adapter.ts | 40 ++++++--- .../blockchain-wallet.handler.ts | 10 ++- .../mpc-keygen-completed.handler.ts | 18 +++- .../services/user-application.service.ts | 28 ++++--- .../src/infrastructure/redis/redis.service.ts | 62 ++++++++++++++ 9 files changed, 228 insertions(+), 47 deletions(-) diff --git a/backend/services/blockchain-service/package-lock.json b/backend/services/blockchain-service/package-lock.json index 43aca0c0..ec29cf38 100644 --- a/backend/services/blockchain-service/package-lock.json +++ b/backend/services/blockchain-service/package-lock.json @@ -20,6 +20,7 @@ "@prisma/client": "^5.7.0", 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"peer": true, "dependencies": { "esrecurse": "^4.3.0", "estraverse": "^4.1.1" @@ -10014,7 +10081,6 @@ "integrity": "sha512-39nnKffWz8xN1BU/2c79n9nB9HDzo0niYUqx6xyqUnyoAnQyyWpOTdZEeiCch8BBu515t4wp9ZmgVfVhn9EBpw==", "dev": true, "license": "BSD-2-Clause", - "peer": true, "engines": { "node": ">=4.0" } @@ -10025,7 +10091,6 @@ "integrity": "sha512-eflK8wEtyOE6+hsaRVPxvUKYCpRgzLqDTb8krvAsRIwOGlHoSgYLgBXoubGgLd2fT41/OUYdb48v4k4WWHQurA==", "dev": true, "license": "MIT", - "peer": true, "dependencies": { "@types/json-schema": "^7.0.9", "ajv": "^8.9.0", diff --git a/backend/services/blockchain-service/package.json b/backend/services/blockchain-service/package.json index 1a7efd04..ce7c29f7 100644 --- a/backend/services/blockchain-service/package.json +++ b/backend/services/blockchain-service/package.json @@ -39,6 +39,7 @@ "@prisma/client": "^5.7.0", "@scure/bip32": "^1.3.2", "@scure/bip39": "^1.6.0", + "bcrypt": "^6.0.0", "bech32": "^2.0.0", "class-transformer": "^0.5.1", "class-validator": "^0.14.0", @@ -53,6 +54,7 @@ "@nestjs/cli": "^10.0.0", "@nestjs/schematics": "^10.0.0", "@nestjs/testing": "^10.0.0", + "@types/bcrypt": "^6.0.0", "@types/express": "^4.17.17", "@types/jest": "^29.5.2", "@types/node": "^20.3.1", diff --git a/backend/services/blockchain-service/src/application/services/address-derivation.service.ts b/backend/services/blockchain-service/src/application/services/address-derivation.service.ts index 3a318742..61d46a8b 100644 --- a/backend/services/blockchain-service/src/application/services/address-derivation.service.ts +++ b/backend/services/blockchain-service/src/application/services/address-derivation.service.ts @@ -82,24 +82,36 @@ export class AddressDerivationService { // 3. 生成恢复助记词 (与账户序列号关联) this.logger.log(`[MNEMONIC] Generating recovery mnemonic for account ${accountSequence}`); - const mnemonicResult = this.recoveryMnemonic.generateMnemonic({ + const mnemonicResult = await this.recoveryMnemonic.generateMnemonic({ userId: userId.toString(), publicKey, }); this.logger.log(`[MNEMONIC] Recovery mnemonic generated, hash: ${mnemonicResult.mnemonicHash.slice(0, 16)}...`); // 4. 存储恢复助记词到 blockchain-service 数据库 (使用 accountSequence 关联) - await this.prisma.recoveryMnemonic.create({ - data: { + // 检查是否已存在，避免重复创建 + const existingMnemonic = await this.prisma.recoveryMnemonic.findFirst({ + where: { accountSequence, - publicKey, - encryptedMnemonic: mnemonicResult.encryptedMnemonic, - mnemonicHash: mnemonicResult.mnemonicHash, status: 'ACTIVE', - isBackedUp: false, }, }); - this.logger.log(`[MNEMONIC] Recovery mnemonic saved for account ${accountSequence}`); + + if (existingMnemonic) { + this.logger.warn(`[MNEMONIC] Recovery mnemonic already exists for account ${accountSequence}, skipping creation`); + } else { + await this.prisma.recoveryMnemonic.create({ + data: { + accountSequence, + publicKey, + encryptedMnemonic: mnemonicResult.encryptedMnemonic, + mnemonicHash: mnemonicResult.mnemonicHash, + status: 'ACTIVE', + isBackedUp: false, + }, + }); + this.logger.log(`[MNEMONIC] Recovery mnemonic saved for account ${accountSequence}`); + } // 5. 发布钱包地址创建事件 (包含所有链的地址和助记词) const event = new WalletAddressCreatedEvent({ diff --git a/backend/services/blockchain-service/src/application/services/mnemonic-verification.service.ts b/backend/services/blockchain-service/src/application/services/mnemonic-verification.service.ts index 717b85c8..8965da00 100644 --- a/backend/services/blockchain-service/src/application/services/mnemonic-verification.service.ts +++ b/backend/services/blockchain-service/src/application/services/mnemonic-verification.service.ts @@ -48,8 +48,8 @@ export class MnemonicVerificationService { }; } - // 2. 使用 RecoveryMnemonicAdapter 验证哈希 - const result = this.recoveryMnemonic.verifyMnemonic(mnemonic, recoveryRecord.mnemonicHash); + // 2. 使用 RecoveryMnemonicAdapter 验证哈希 (bcrypt 是异步的) + const result = await this.recoveryMnemonic.verifyMnemonic(mnemonic, recoveryRecord.mnemonicHash); if (result.valid) { this.logger.log(`Mnemonic verified successfully for account ${accountSequence}`); diff --git a/backend/services/blockchain-service/src/infrastructure/blockchain/recovery-mnemonic.adapter.ts b/backend/services/blockchain-service/src/infrastructure/blockchain/recovery-mnemonic.adapter.ts index 1c6fd159..49580269 100644 --- a/backend/services/blockchain-service/src/infrastructure/blockchain/recovery-mnemonic.adapter.ts +++ b/backend/services/blockchain-service/src/infrastructure/blockchain/recovery-mnemonic.adapter.ts @@ -10,6 +10,7 @@ import { validateMnemonic, entropyToMnemonic } from '@scure/bip39'; import { wordlist } from '@scure/bip39/wordlists/english'; import { createHash, createCipheriv, createDecipheriv, randomBytes } from 'crypto'; import { ConfigService } from '@nestjs/config'; +import * as bcrypt from 'bcrypt'; export interface GenerateMnemonicParams { userId: string; @@ -52,7 +53,7 @@ export class RecoveryMnemonicAdapter { * 2. 从熵生成 12 词 BIP39 助记词 * 3. 加密存储 */ - generateMnemonic(params: GenerateMnemonicParams): GenerateMnemonicResult { + async generateMnemonic(params: GenerateMnemonicParams): Promise { const { userId, publicKey } = params; this.logger.log(`Generating recovery mnemonic for user=${userId}, publicKey=${publicKey.slice(0, 16)}...`); @@ -83,8 +84,8 @@ export class RecoveryMnemonicAdapter { // 加密助记词 const encryptedMnemonic = this.encryptMnemonic(mnemonic); - // 计算助记词哈希 (用于验证，不可逆) - const mnemonicHash = this.hashMnemonic(mnemonic); + // 计算助记词哈希 (用于验证，不可逆，使用 bcrypt) + const mnemonicHash = await this.hashMnemonic(mnemonic); this.logger.log(`Recovery mnemonic generated: hash=${mnemonicHash.slice(0, 16)}...`); @@ -97,16 +98,26 @@ export class RecoveryMnemonicAdapter { } /** - * 验证助记词是否正确 + * 验证助记词是否正确 (异步，使用 bcrypt) */ - verifyMnemonic(mnemonic: string, expectedHash: string): VerifyMnemonicResult { + async verifyMnemonic(mnemonic: string, expectedHash: string): Promise { if (!validateMnemonic(mnemonic, wordlist)) { return { valid: false, message: 'Invalid mnemonic format' }; } - const hash = this.hashMnemonic(mnemonic); - if (hash !== expectedHash) { - return { valid: false, message: 'Mnemonic does not match' }; + // 兼容旧的 SHA256 hash 和新的 bcrypt hash + if (expectedHash.startsWith('$2')) { + // bcrypt hash + const isValid = await bcrypt.compare(mnemonic, expectedHash); + if (!isValid) { + return { valid: false, message: 'Mnemonic does not match' }; + } + } else { + // 旧的 SHA256 hash (兼容性) + const hash = this.hashMnemonicSha256(mnemonic); + if (hash !== expectedHash) { + return { valid: false, message: 'Mnemonic does not match' }; + } } return { valid: true }; @@ -146,9 +157,18 @@ export class RecoveryMnemonicAdapter { } /** - * 计算助记词哈希 (不可逆) + * 计算助记词哈希 (使用 bcrypt，抗暴力破解) */ - private hashMnemonic(mnemonic: string): string { + private async hashMnemonic(mnemonic: string): Promise { + // bcrypt rounds = 12, 足够安全且不会太慢 + const hash = await bcrypt.hash(mnemonic, 12); + return hash; + } + + /** + * SHA256 哈希 (兼容旧数据) + */ + private hashMnemonicSha256(mnemonic: string): string { const hash1 = createHash('sha256').update(mnemonic).digest(); const hash2 = createHash('sha256').update(hash1).digest(); return hash2.toString('hex'); diff --git a/backend/services/identity-service/src/application/event-handlers/blockchain-wallet.handler.ts b/backend/services/identity-service/src/application/event-handlers/blockchain-wallet.handler.ts index 82b62906..ffaa79f1 100644 --- a/backend/services/identity-service/src/application/event-handlers/blockchain-wallet.handler.ts +++ b/backend/services/identity-service/src/application/event-handlers/blockchain-wallet.handler.ts @@ -110,6 +110,7 @@ export class BlockchainWalletHandler implements OnModuleInit { } // 5. Update Redis status to completed (include mnemonic for first-time retrieval) + // Uses atomic operation to ensure proper state transition const statusData: WalletCompletedStatusData = { status: 'completed', userId, @@ -119,13 +120,18 @@ export class BlockchainWalletHandler implements OnModuleInit { updatedAt: new Date().toISOString(), }; - await this.redisService.set( + const updated = await this.redisService.updateKeygenStatusAtomic( `${KEYGEN_STATUS_PREFIX}${userId}`, JSON.stringify(statusData), + 'completed', KEYGEN_STATUS_TTL, ); - this.logger.log(`[STATUS] Keygen status updated to 'completed' for user: ${userId}`); + if (updated) { + this.logger.log(`[STATUS] Keygen status updated to 'completed' for user: ${userId}`); + } else { + this.logger.log(`[STATUS] Status not updated for user: ${userId} (unexpected - completed should always succeed)`); + } // Log all addresses addresses.forEach((addr) => { diff --git a/backend/services/identity-service/src/application/event-handlers/mpc-keygen-completed.handler.ts b/backend/services/identity-service/src/application/event-handlers/mpc-keygen-completed.handler.ts index 3e4bfc02..8e5ed9e1 100644 --- a/backend/services/identity-service/src/application/event-handlers/mpc-keygen-completed.handler.ts +++ b/backend/services/identity-service/src/application/event-handlers/mpc-keygen-completed.handler.ts @@ -88,6 +88,9 @@ export class MpcKeygenCompletedHandler implements OnModuleInit { * From mpc-service, keygen is complete with public key. * Update status to "deriving" - blockchain-service will now derive addresses * and send WalletAddressCreated event which BlockchainWalletHandler will process. + * + * Uses atomic Redis update to ensure status only advances forward: + * pending -> generating -> deriving -> completed */ private async handleKeygenCompleted(payload: KeygenCompletedPayload): Promise { const { publicKey, extraPayload } = payload; @@ -100,10 +103,12 @@ export class MpcKeygenCompletedHandler implements OnModuleInit { const { userId, username } = extraPayload; this.logger.log(`[STATUS] Keygen completed: userId=${userId}, username=${username}`); this.logger.log(`[STATUS] Public key: ${publicKey?.substring(0, 30)}...`); - this.logger.log(`[STATUS] Waiting for blockchain-service to derive addresses...`); try { + this.logger.log(`[STATUS] Waiting for blockchain-service to derive addresses...`); + // Update status to "deriving" - waiting for blockchain-service + // Uses atomic operation to ensure we don't overwrite higher-priority status const statusData: KeygenStatusData = { status: 'deriving', userId, @@ -111,14 +116,19 @@ export class MpcKeygenCompletedHandler implements OnModuleInit { updatedAt: new Date().toISOString(), }; - await this.redisService.set( + const updated = await this.redisService.updateKeygenStatusAtomic( `${KEYGEN_STATUS_PREFIX}${userId}`, JSON.stringify(statusData), + 'deriving', KEYGEN_STATUS_TTL, ); - this.logger.log(`[STATUS] Keygen status updated to 'deriving' for user: ${userId}`); - this.logger.log(`[STATUS] blockchain-service will derive addresses and send WalletAddressCreated event`); + if (updated) { + this.logger.log(`[STATUS] Keygen status updated to 'deriving' for user: ${userId}`); + this.logger.log(`[STATUS] blockchain-service will derive addresses and send WalletAddressCreated event`); + } else { + this.logger.log(`[STATUS] Status not updated for user: ${userId} (current status has higher priority)`); + } } catch (error) { this.logger.error(`[ERROR] Failed to update keygen status: ${error}`, error); } diff --git a/backend/services/identity-service/src/application/services/user-application.service.ts b/backend/services/identity-service/src/application/services/user-application.service.ts index f6333fdb..9d3f7410 100644 --- a/backend/services/identity-service/src/application/services/user-application.service.ts +++ b/backend/services/identity-service/src/application/services/user-application.service.ts @@ -156,27 +156,31 @@ export class UserApplicationService { if (!account) throw new ApplicationError('账户序列号不存在'); if (!account.isActive) throw new ApplicationError('账户已冻结或注销'); - // 获取账户的钱包地址用于验证 - const expectedAddresses: Array<{ chainType: string; address: string }> = []; - const kavaWallet = account.getWalletAddress(ChainType.KAVA); - if (kavaWallet) { - expectedAddresses.push({ chainType: 'KAVA', address: kavaWallet.address }); + // 检查验证失败次数限制 (防止暴力破解) + const failKey = `mnemonic:fail:${command.accountSequence}`; + const failCountStr = await this.redisService.get(failKey); + const failCount = failCountStr ? parseInt(failCountStr, 10) : 0; + if (failCount >= 5) { + throw new ApplicationError('验证次数过多，请1小时后重试'); } - if (expectedAddresses.length === 0) { - throw new ApplicationError('账户没有关联的钱包地址'); - } - - // 调用 blockchain-service 验证助记词 - const verifyResult = await this.blockchainClient.verifyMnemonic({ + // 调用 blockchain-service 验证助记词 hash + // 助记词作为身份凭证，通过 hash 匹配验证，不需要与钱包地址关联 + const verifyResult = await this.blockchainClient.verifyMnemonicByAccount({ + accountSequence: command.accountSequence, mnemonic: command.mnemonic, - expectedAddresses, }); if (!verifyResult.valid) { + // 记录失败次数 + await this.redisService.incr(failKey); + await this.redisService.expire(failKey, 3600); // 1小时过期 throw new ApplicationError('助记词错误'); } + // 验证成功，清除失败计数 + await this.redisService.delete(failKey); + account.addDevice(command.newDeviceId, command.deviceName); account.recordLogin(); await this.userRepository.save(account); diff --git a/backend/services/identity-service/src/infrastructure/redis/redis.service.ts b/backend/services/identity-service/src/infrastructure/redis/redis.service.ts index d4626787..8628096c 100644 --- a/backend/services/identity-service/src/infrastructure/redis/redis.service.ts +++ b/backend/services/identity-service/src/infrastructure/redis/redis.service.ts @@ -44,6 +44,68 @@ export class RedisService implements OnModuleDestroy { await this.client.expire(key, seconds); } + /** + * 原子更新 keygen 状态 + * 使用 Lua 脚本确保状态只能向前推进: pending < generating < deriving < completed + * failed 状态只有在当前不是 completed 时才能设置 + * + * @returns true 如果更新成功, false 如果当前状态优先级更高 + */ + async updateKeygenStatusAtomic( + key: string, + newStatusData: string, + newStatus: string, + ttlSeconds: number, + ): Promise { + // 状态优先级：completed > failed > deriving > generating > pending + // 数字越大优先级越高 + const luaScript = ` + local key = KEYS[1] + local newData = ARGV[1] + local newStatus = ARGV[2] + local ttl = tonumber(ARGV[3]) + + -- 定义状态优先级 + local priority = { + pending = 1, + generating = 2, + deriving = 3, + failed = 4, + completed = 5 + } + + local newPriority = priority[newStatus] or 0 + + -- 获取当前状态 + local currentData = redis.call('GET', key) + if currentData then + local current = cjson.decode(currentData) + local currentStatus = current.status or 'pending' + local currentPriority = priority[currentStatus] or 0 + + -- 只有新状态优先级更高时才更新 + if newPriority <= currentPriority then + return 0 -- 不更新 + end + end + + -- 更新状态 + redis.call('SET', key, newData, 'EX', ttl) + return 1 -- 更新成功 + `; + + const result = await this.client.eval( + luaScript, + 1, + key, + newStatusData, + newStatus, + ttlSeconds.toString(), + ); + + return result === 1; + } + onModuleDestroy() { this.client.disconnect(); }