SSH Authentication with FileVault Encryption on macOS
By
ingve
A respectable bake. You'd come back tomorrow for another.
Summary
This technical documentation explains how SSH authentication works when FileVault is enabled on macOS. When FileVault encrypts the data volume, it remains locked until user authentication, which affects OpenSSH since its configuration files are stored on that encrypted volume. However, the article notes that password authentication via SSH is still possible when Remote Login is enabled, even during this locked state.
Key quotes
· 4 pulledWhen FileVault is enabled, the data volume is locked and unavailable during and after booting, until an account has been authenticated using a password
The macOS version of OpenSSH stores all of its configuration files, both system-wide and per-account, in the data volume
Therefore, the usually configured authentication methods and shell access are not available during this time
However, when Remote Login is enabled, it is possible to perform password authentication using SSH even in this situation
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