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Updated OpenSSH utility scripts to fix file permissions (markdown)

Yanbing 2017-06-02 20:07:39 -07:00
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OpenSSH-utility-scripts-to-fix-file-permissions.md

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Powershell utility scripts are included starting release [v0.0.15.0](https://github.com/PowerShell/Win32-OpenSSH/releases/tag/v0.0.15.0) to automatically fix the permissions on various keys and configuration files for host and user. [Secure protection of various files](https://github.com/PowerShell/Win32-OpenSSH/wiki/Security-protection-of-various-files-in-Win32-OpenSSH) explains why secure enforcement is needed.
- `FixHostFilePermissions.ps1`: checks and fixes the below permissions on default host files:
- user's authorized_keys located at `$env:systemdrive\Users\...\.ssh\authorized_keys`
- host keys generated by `ssh-keygen.exe -A` in the same folder of the script
- sshd_config in the same folder of the script
**`FixHostFilePermissions.ps1`**
It checks and fixes the below permissions on default host files:
- user's authorized_keys located at `$env:systemdrive\Users\...\.ssh\authorized_keys`
- host keys generated by `ssh-keygen.exe -A` in the same folder of the script
- sshd_config in the same folder of the script
```PowerShell
# script prompt to confirm you want to update each permission if Quiet is not specified
.\FixHostFilePermissions.ps1
```
- `FixUserFilePermissions.ps1`: checks and fixes the below file permissions for user's default files:
- user's ssh_config located at `~\.ssh\config`
- user's keys located at `~\.ssh\id_rsa`, `~\.ssh\id_rsa.pub`
- user's keys located at `~\.ssh\id_dsa`, `~\.ssh\id_dsa.pub`
**`FixUserFilePermissions.ps1`**
It checks and fixes the below file permissions for user's default files:
- user's ssh_config located at `~\.ssh\config`
- user's keys located at `~\.ssh\id_rsa`, `~\.ssh\id_rsa.pub`
- user's keys located at `~\.ssh\id_dsa`, `~\.ssh\id_dsa.pub`
```PowerShell
# -Quiet suppresses prompting to confirm you want to update each permission
.\FixUserFilePermissions.ps1 -Quiet
```
- Powershell module `OpenSSHUtils.psm1` checks and fixes customer specified files.
- Function `Fix-HostSSHDConfigPermissions` fixes the sshd_config file specified by user
- Function `Fix-HostKeyPermissions` fixes the permission for host keys specified by user; **Note that to keep the host private keys secure, it is recommended to register them with ssh-agent following
**`OpenSSHUtils.psm1` module**
It checks and fixes permissions on customer specified files.
- Function `Fix-HostSSHDConfigPermissions` fixes the sshd_config file specified by user
- Function `Fix-HostKeyPermissions` fixes the permission for host keys specified by user; **Note that to keep the host private keys secure, it is recommended to register them with ssh-agent following
steps in [link](https://github.com/PowerShell/Win32-OpenSSH/wiki/Install-Win32-OpenSSH)**, but this function makes sure 'NT Service\sshd' has Read permission to the host keys for now in case they are not registered yet.
- Function `Fix-UserKeyPermissions` fixes the the permissions for user's key files specified by user
- Function `Fix-AuthorizedKeyPermissions` fixes the permissions for the authorized_keys file specified by user
- Function `Fix-UserSSHConfigPermissions` fixes the permissions for user's ssh config specified by user
- Function `Fix-UserKeyPermissions` fixes the the permissions for user's key files specified by user
- Function `Fix-AuthorizedKeyPermissions` fixes the permissions for the authorized_keys file specified by user
- Function `Fix-UserSSHConfigPermissions` fixes the permissions for user's ssh config specified by user
```PowerShell
Import-Module .\OpenSSHUtils.psm1 -Force