Security zh HK - Rudokhvist/ArchiSteamFarm GitHub Wiki
ASF currently supports the following encryption methods as a definition of ECryptoMethod:
| 值 | 名稱 |
|---|---|
| 0 | 明文 |
| 1 | AES |
| 2 | ProtectedDataForCurrentUser |
| 3 | EnvironmentVariable |
| 4 | 檔案： |
The exact description and comparison of them is available below.
In order to generate encrypted password, e.g. for SteamPassword usage, you should execute encrypt command with the appropriate encryption that you chose and your original plain-text password. Afterwards, put the encrypted string that you've got as SteamPassword bot config property, and finally change PasswordFormat to the one that matches your chosen encryption method. Some formats do not require encrypt command, for example EnvironmentVariable or File, just put appropriate path for them.
This is the most simple and insecure way of storing a password, defined as ECryptoMethod of 0. ASF expects the string to be a plain text - a password in its direct form. It's the easiest one to use, and 100% compatible with all the setups, therefore it's a default way of storing secrets, totally insecure for safe storage.
Considered secure by today standards, AES way of storing the password is defined as ECryptoMethod of 1. ASF expects the string to be a base64-encoded sequence of characters resulting in AES-encrypted byte array after translation, which then should be decrypted using included initialization vector and ASF encryption key.
The method above guarantees security as long as attacker doesn't know ASF encryption key which is being used for decryption as well as encryption of passwords. ASF allows you to specify key via --cryptkey command-line argument, which you should use for maximum security. If you decide to omit it, ASF will use its own key which is known and hardcoded into the application, meaning anybody can reverse the ASF encryption and get decrypted password. It still requires some effort and is not that easy to do, but possible, that's why you should almost always use AES encryption with your own --cryptkey which is kept in secret. AES method used in ASF provides security that should be satisfying and it's a balance between simplicity of PlainText and complexity of ProtectedDataForCurrentUser, but it's highly recommended to use it with custom --cryptkey. If used properly, guarantees decent security for safe storage.
Currently the most secure way of encrypting the password that ASF offers, and much safer than AES method explained above, is defined as ECryptoMethod of 2. The major advantage of this method is at the same time the major disadvantage - instead of using encryption key (like in AES), data is encrypted using login credentials of currently logged in user, which means that it's possible to decrypt the data only on the machine it was encrypted on, and in addition to that, only by the user who issued the encryption. This ensures that even if you send your entire Bot.json with encrypted SteamPassword using this method to somebody else, he will not be able to decrypt the password without direct access to your PC. This is excellent security measure, but at the same time has a major disadvantage of being least compatible, as the password encrypted using this method will be incompatible with any other user as well as machine - including your own if you decide to e.g. reinstall your operating system. Still, it's one of the best methods of storing passwords, and if you're worried about security of PlainText, and don't want to put password each time, then this is your best bet as long as you don't have to access your configs from any other machine than your own.
Please note that this option is available only for machines running Windows OS as of now.
Memory-based storage defined as ECryptoMethod of 3. ASF will read the password from the environment variable with given name specified in the password field (e.g. SteamPassword). For example, setting SteamPassword to ASF_PASSWORD_MYACCOUNT and PasswordFormat to 3 will cause ASF to evaluate ${ASF_PASSWORD_MYACCOUNT} environment variable and use whatever is assigned to it as the account password.
File-based storage (possibly outside of the ASF config directory) defined as ECryptoMethod of 4. ASF will read the password from the file path specified in the password field (e.g. SteamPassword). The specified path can be either absolute, or relative to ASF's "home" location (the folder with config directory inside, taking into account --path command-line argument). This method can be used for example with Docker secrets, which create such files for usage, but can also be used outside of Docker if you create appropriate file yourself. For example, setting SteamPassword to /etc/secrets/MyAccount.pass and PasswordFormat to 4 will cause ASF to read /etc/secrets/MyAccount.pass and use whatever is written to that file as the account password.
Remember to ensure that file containing the password is not readable by unauthorized users, as that defeats the whole purpose of using this method.
如果兼容性對您來說不是問題，並且您對ProtectedDataForCurrentUser方法的工作方式沒有問題，那麼將密碼存儲在ASF中是推薦選項，因為它提供最好的安全性。 AES方法對於那些仍想在他們想要的任何機器上使用他們的配置的人來說是一個不錯的選擇，而PlainText是存儲密碼的最簡單的方法，如果您不介意任何人都可以查看JSON配置文件。
請記住，如果攻擊者可以訪問您的PC，則所有這3種方法都被視為不安全。 ASF must be able to decrypt the encrypted passwords, and if the program running on your machine is capable of doing that, then any other program running on the same machine will be capable of doing so, too. ProtectedDataForCurrentUser是最安全的，因為即使使用同一台PC的其他用戶也無法解密，但如果有人能夠竊取您的登錄憑據和機器信息以及ASF配置文件，仍然可以解密數據 。
For advanced setups, you can utilize EnvironmentVariable and File. They have limited usability, the EnvironmentVariable will be a good idea if you'd prefer to obtain password through some kind of custom solution and store it in memory exclusively, while File is good for example with Docker secrets. Both of them are unencrypted however, so you basically move the risk from ASF config file to whatever you pick from those two.
In addition to encryption methods specified above, it's possible to also avoid specifying passwords entirely, for example as SteamPassword by using an empty string or null value. ASF will ask you for your password when it's required, and won't save it anywhere but keep in memory of currently running process, until you close it. While being the most secure method of dealing with passwords (they're not saved anywhere), it's also the most troublesome as you need to enter your password manually on each ASF run (when it's required). 如果這對您來說不是問題，那麼這是安全方面最好的選擇。
ASF不支持任何解密已加密密碼的方法，因為解密方法僅在內部用於訪問進程內的數據。 If you want to revert encryption procedure e.g. for moving ASF to other machine when using ProtectedDataForCurrentUser, then simply repeat the procedure from beginning in the new environment.
ASF currently supports the following hashing methods as a definition of EHashingMethod:
| 值 | 名稱 |
|---|---|
| 0 | 明文 |
| 1 | SCrypt |
| 2 | Pbkdf2 |
The exact description and comparison of them is available below.
In order to generate a hash, e.g. for IPCPassword usage, you should execute hash command with the appropriate hashing method that you chose and your original plain-text password. Afterwards, put the hashed string that you've got as IPCPassword ASF config property, and finally change IPCPasswordFormat to the one that matches your chosen hashing method.
This is the most simple and insecure way of hashing a password, defined as EHashingMethod of 0. ASF will generate hash matching the original input. It's the easiest one to use, and 100% compatible with all the setups, therefore it's a default way of storing secrets, totally insecure for safe storage.
Considered secure by today standards, SCrypt way of hashing the password is defined as EHashingMethod of 1. ASF will use the SCrypt implementation using 8 blocks, 8192 iterations, 32 hash length and encryption key as a salt to generate the array of bytes. The resulting bytes will then be encoded as base64 string.
ASF allows you to specify salt for this method via --cryptkey command-line argument, which you should use for maximum security. If you decide to omit it, ASF will use its own key which is known and hardcoded into the application, meaning hashing will be less secure. If used properly, guarantees decent security for safe storage.
Considered weak by today standards, Pbkdf2 way of hashing the password is defined as EHashingMethod of 2. ASF will use the Pbkdf2 implementation using 10000 iterations, 32 hash length and encryption key as a salt, with SHA-256 as a hmac algorithm to generate the array of bytes. The resulting bytes will then be encoded as base64 string.
ASF allows you to specify salt for this method via --cryptkey command-line argument, which you should use for maximum security. If you decide to omit it, ASF will use its own key which is known and hardcoded into the application, meaning hashing will be less secure.
If you'd like to use a hashing method for storing some secrets, such as IPCPassword, we recommend to use SCrypt with custom salt, as it provides a very decent security against brute-forcing attempts. Pbkdf2 is offered only for compatibility reasons, mainly because we already have a working (and needed) implementation of it for other use cases across Steam platform (e.g. parental pins). It's still considered secure, but weak compared to alternatives (e.g. SCrypt).