Issue Summary

RangeError: Invalid key length in crypto.ts - Incorrect encoding used for CALENDSO_ENCRYPTION_KEY

The symmetric encryption/decryption functions in packages/lib/crypto.ts are using incorrect encoding (latin1) to decode the base64-encoded CALENDSO_ENCRYPTION_KEY environment variable. This causes a "RangeError: Invalid key length" error when trying to create AES256 ciphers, as the key length becomes 44 bytes instead of the required 32 bytes for AES256 encryption.

Steps to Reproduce

1. Set up a Cal.com development environment with a properly configured .env file
2. Ensure CALENDSO_ENCRYPTION_KEY is set to a base64-encoded 32-byte key (e.g., SW24Ctnk0foJJkBDsdIr4mW2n/kHOEFRfhU7bSbZ4Jc=)
3. Start the development server with yarn dev
4. Try to add an ICS Feed Calendar integration by making a POST request to /api/integrations/ics-feedcalendar/add
5. The error occurs during the encryption process in the API handler

Actual Results

• Application throws RangeError: Invalid key length at line 18 in crypto.ts
• Error occurs in crypto.createCipheriv(ALGORITHM, _key, iv) call
• Stack trace shows the error originates from symmetricEncrypt() function
• ICS Feed Calendar integration fails to save credentials
• Console shows: code: 'ERR_CRYPTO_INVALID_KEYLEN'

Expected Results

• Encryption/decryption functions should work correctly with base64-encoded keys
• ICS Feed Calendar integration should successfully save encrypted credentials
• No crypto-related errors when using properly configured environment variables
• The 32-byte base64 key should be correctly decoded to exactly 32 bytes for AES256

Evidence