import * as plugins from '../../plugins.js'; import * as paths from '../../paths.js'; import { Email } from '../core/classes.email.js'; // MtaService reference removed const readFile = plugins.util.promisify(plugins.fs.readFile); const writeFile = plugins.util.promisify(plugins.fs.writeFile); const generateKeyPair = plugins.util.promisify(plugins.crypto.generateKeyPair); export class DKIMCreator { keysDir; storageManager; // StorageManager instance constructor(keysDir = paths.keysDir, storageManager) { this.keysDir = keysDir; this.storageManager = storageManager; } async getKeyPathsForDomain(domainArg) { return { privateKeyPath: plugins.path.join(this.keysDir, `${domainArg}-private.pem`), publicKeyPath: plugins.path.join(this.keysDir, `${domainArg}-public.pem`), }; } // Check if a DKIM key is present and creates one and stores it to disk otherwise async handleDKIMKeysForDomain(domainArg) { try { await this.readDKIMKeys(domainArg); } catch (error) { console.log(`No DKIM keys found for ${domainArg}. Generating...`); await this.createAndStoreDKIMKeys(domainArg); const dnsValue = await this.getDNSRecordForDomain(domainArg); await plugins.smartfs.directory(paths.dnsRecordsDir).recursive().create(); await plugins.smartfs.file(plugins.path.join(paths.dnsRecordsDir, `${domainArg}.dkimrecord.json`)).write(JSON.stringify(dnsValue, null, 2)); } } async handleDKIMKeysForEmail(email) { const domain = email.from.split('@')[1]; await this.handleDKIMKeysForDomain(domain); } // Read DKIM keys - always use storage manager, migrate from filesystem if needed async readDKIMKeys(domainArg) { // Try to read from storage manager first if (this.storageManager) { try { const [privateKey, publicKey] = await Promise.all([ this.storageManager.get(`/email/dkim/${domainArg}/private.key`), this.storageManager.get(`/email/dkim/${domainArg}/public.key`) ]); if (privateKey && publicKey) { return { privateKey, publicKey }; } } catch (error) { // Fall through to migration check } // Check if keys exist in filesystem and migrate them to storage manager const keyPaths = await this.getKeyPathsForDomain(domainArg); try { const [privateKeyBuffer, publicKeyBuffer] = await Promise.all([ readFile(keyPaths.privateKeyPath), readFile(keyPaths.publicKeyPath), ]); // Convert the buffers to strings const privateKey = privateKeyBuffer.toString(); const publicKey = publicKeyBuffer.toString(); // Migrate to storage manager console.log(`Migrating DKIM keys for ${domainArg} from filesystem to StorageManager`); await Promise.all([ this.storageManager.set(`/email/dkim/${domainArg}/private.key`, privateKey), this.storageManager.set(`/email/dkim/${domainArg}/public.key`, publicKey) ]); return { privateKey, publicKey }; } catch (error) { if (error.code === 'ENOENT') { // Keys don't exist anywhere throw new Error(`DKIM keys not found for domain ${domainArg}`); } throw error; } } else { // No storage manager, use filesystem directly const keyPaths = await this.getKeyPathsForDomain(domainArg); const [privateKeyBuffer, publicKeyBuffer] = await Promise.all([ readFile(keyPaths.privateKeyPath), readFile(keyPaths.publicKeyPath), ]); const privateKey = privateKeyBuffer.toString(); const publicKey = publicKeyBuffer.toString(); return { privateKey, publicKey }; } } // Create a DKIM key pair - changed to public for API access async createDKIMKeys() { const { privateKey, publicKey } = await generateKeyPair('rsa', { modulusLength: 2048, publicKeyEncoding: { type: 'spki', format: 'pem' }, privateKeyEncoding: { type: 'pkcs1', format: 'pem' }, }); return { privateKey, publicKey }; } // Store a DKIM key pair - uses storage manager if available, else disk async storeDKIMKeys(privateKey, publicKey, privateKeyPath, publicKeyPath) { // Store in storage manager if available if (this.storageManager) { // Extract domain from path (e.g., /path/to/keys/example.com-private.pem -> example.com) const match = privateKeyPath.match(/\/([^\/]+)-private\.pem$/); if (match) { const domain = match[1]; await Promise.all([ this.storageManager.set(`/email/dkim/${domain}/private.key`, privateKey), this.storageManager.set(`/email/dkim/${domain}/public.key`, publicKey) ]); } } // Also store to filesystem for backward compatibility await Promise.all([writeFile(privateKeyPath, privateKey), writeFile(publicKeyPath, publicKey)]); } // Create a DKIM key pair and store it to disk - changed to public for API access async createAndStoreDKIMKeys(domain) { const { privateKey, publicKey } = await this.createDKIMKeys(); const keyPaths = await this.getKeyPathsForDomain(domain); await this.storeDKIMKeys(privateKey, publicKey, keyPaths.privateKeyPath, keyPaths.publicKeyPath); console.log(`DKIM keys for ${domain} created and stored.`); } // Changed to public for API access async getDNSRecordForDomain(domainArg) { await this.handleDKIMKeysForDomain(domainArg); const keys = await this.readDKIMKeys(domainArg); // Remove the PEM header and footer and newlines const pemHeader = '-----BEGIN PUBLIC KEY-----'; const pemFooter = '-----END PUBLIC KEY-----'; const keyContents = keys.publicKey .replace(pemHeader, '') .replace(pemFooter, '') .replace(/\n/g, ''); // Now generate the DKIM DNS TXT record const dnsRecordValue = `v=DKIM1; h=sha256; k=rsa; p=${keyContents}`; return { name: `mta._domainkey.${domainArg}`, type: 'TXT', dnsSecEnabled: null, value: dnsRecordValue, }; } /** * Get DKIM key metadata for a domain */ async getKeyMetadata(domain, selector = 'default') { if (!this.storageManager) { return null; } const metadataKey = `/email/dkim/${domain}/${selector}/metadata`; const metadataStr = await this.storageManager.get(metadataKey); if (!metadataStr) { return null; } return JSON.parse(metadataStr); } /** * Save DKIM key metadata */ async saveKeyMetadata(metadata) { if (!this.storageManager) { return; } const metadataKey = `/email/dkim/${metadata.domain}/${metadata.selector}/metadata`; await this.storageManager.set(metadataKey, JSON.stringify(metadata)); } /** * Check if DKIM keys need rotation */ async needsRotation(domain, selector = 'default', rotationIntervalDays = 90) { const metadata = await this.getKeyMetadata(domain, selector); if (!metadata) { // No metadata means old keys, should rotate return true; } const now = Date.now(); const keyAgeMs = now - metadata.createdAt; const keyAgeDays = keyAgeMs / (1000 * 60 * 60 * 24); return keyAgeDays >= rotationIntervalDays; } /** * Rotate DKIM keys for a domain */ async rotateDkimKeys(domain, currentSelector = 'default', keySize = 2048) { console.log(`Rotating DKIM keys for ${domain}...`); // Generate new selector based on date const now = new Date(); const newSelector = `key${now.getFullYear()}${String(now.getMonth() + 1).padStart(2, '0')}`; // Create new keys with custom key size const { privateKey, publicKey } = await generateKeyPair('rsa', { modulusLength: keySize, publicKeyEncoding: { type: 'spki', format: 'pem' }, privateKeyEncoding: { type: 'pkcs1', format: 'pem' }, }); // Store new keys with new selector const newKeyPaths = await this.getKeyPathsForSelector(domain, newSelector); // Store in storage manager if available if (this.storageManager) { await Promise.all([ this.storageManager.set(`/email/dkim/${domain}/${newSelector}/private.key`, privateKey), this.storageManager.set(`/email/dkim/${domain}/${newSelector}/public.key`, publicKey) ]); } // Also store to filesystem await this.storeDKIMKeys(privateKey, publicKey, newKeyPaths.privateKeyPath, newKeyPaths.publicKeyPath); // Save metadata for new keys const metadata = { domain, selector: newSelector, createdAt: Date.now(), previousSelector: currentSelector, keySize }; await this.saveKeyMetadata(metadata); // Update metadata for old keys const oldMetadata = await this.getKeyMetadata(domain, currentSelector); if (oldMetadata) { oldMetadata.rotatedAt = Date.now(); await this.saveKeyMetadata(oldMetadata); } console.log(`DKIM keys rotated for ${domain}. New selector: ${newSelector}`); return newSelector; } /** * Get key paths for a specific selector */ async getKeyPathsForSelector(domain, selector) { return { privateKeyPath: plugins.path.join(this.keysDir, `${domain}-${selector}-private.pem`), publicKeyPath: plugins.path.join(this.keysDir, `${domain}-${selector}-public.pem`), }; } /** * Read DKIM keys for a specific selector */ async readDKIMKeysForSelector(domain, selector) { // Try to read from storage manager first if (this.storageManager) { try { const [privateKey, publicKey] = await Promise.all([ this.storageManager.get(`/email/dkim/${domain}/${selector}/private.key`), this.storageManager.get(`/email/dkim/${domain}/${selector}/public.key`) ]); if (privateKey && publicKey) { return { privateKey, publicKey }; } } catch (error) { // Fall through to migration check } // Check if keys exist in filesystem and migrate them to storage manager const keyPaths = await this.getKeyPathsForSelector(domain, selector); try { const [privateKeyBuffer, publicKeyBuffer] = await Promise.all([ readFile(keyPaths.privateKeyPath), readFile(keyPaths.publicKeyPath), ]); const privateKey = privateKeyBuffer.toString(); const publicKey = publicKeyBuffer.toString(); // Migrate to storage manager console.log(`Migrating DKIM keys for ${domain}/${selector} from filesystem to StorageManager`); await Promise.all([ this.storageManager.set(`/email/dkim/${domain}/${selector}/private.key`, privateKey), this.storageManager.set(`/email/dkim/${domain}/${selector}/public.key`, publicKey) ]); return { privateKey, publicKey }; } catch (error) { if (error.code === 'ENOENT') { throw new Error(`DKIM keys not found for domain ${domain} with selector ${selector}`); } throw error; } } else { // No storage manager, use filesystem directly const keyPaths = await this.getKeyPathsForSelector(domain, selector); const [privateKeyBuffer, publicKeyBuffer] = await Promise.all([ readFile(keyPaths.privateKeyPath), readFile(keyPaths.publicKeyPath), ]); const privateKey = privateKeyBuffer.toString(); const publicKey = publicKeyBuffer.toString(); return { privateKey, publicKey }; } } /** * Get DNS record for a specific selector */ async getDNSRecordForSelector(domain, selector) { const keys = await this.readDKIMKeysForSelector(domain, selector); // Remove the PEM header and footer and newlines const pemHeader = '-----BEGIN PUBLIC KEY-----'; const pemFooter = '-----END PUBLIC KEY-----'; const keyContents = keys.publicKey .replace(pemHeader, '') .replace(pemFooter, '') .replace(/\n/g, ''); // Generate the DKIM DNS TXT record const dnsRecordValue = `v=DKIM1; h=sha256; k=rsa; p=${keyContents}`; return { name: `${selector}._domainkey.${domain}`, type: 'TXT', dnsSecEnabled: null, value: dnsRecordValue, }; } /** * Clean up old DKIM keys after grace period */ async cleanupOldKeys(domain, gracePeriodDays = 30) { if (!this.storageManager) { return; } // List all selectors for the domain const metadataKeys = await this.storageManager.list(`/email/dkim/${domain}/`); for (const key of metadataKeys) { if (key.endsWith('/metadata')) { const metadataStr = await this.storageManager.get(key); if (metadataStr) { const metadata = JSON.parse(metadataStr); // Check if key is rotated and past grace period if (metadata.rotatedAt) { const gracePeriodMs = gracePeriodDays * 24 * 60 * 60 * 1000; const now = Date.now(); if (now - metadata.rotatedAt > gracePeriodMs) { console.log(`Cleaning up old DKIM keys for ${domain} selector ${metadata.selector}`); // Delete key files const keyPaths = await this.getKeyPathsForSelector(domain, metadata.selector); try { await plugins.fs.promises.unlink(keyPaths.privateKeyPath); await plugins.fs.promises.unlink(keyPaths.publicKeyPath); } catch (error) { console.warn(`Failed to delete old key files: ${error.message}`); } // Delete metadata await this.storageManager.delete(key); } } } } } } } //# 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