Re: [pve-devel] [PATCH v3 manager] pve6to7: add check for pool permissions

[Lorenz Stechauner <l.stechauner@proxmox.com>]

changes to v2:
* using simple parser to parse user roles
* moved checks to an own sub

On 17.06.21 10:39, Lorenz Stechauner wrote:
> the two checks make sure that:
> * no user defined role 'PVEPoolUser' exists
> * the user gets a hint for roles only containing Pool.Allocate and
>      not Pool.Audit
>
> a very simple parser for user.cfg was implemented to be able to
> parse the (in pve 6 invalid) Pool.Audit permission
>
> Signed-off-by: Lorenz Stechauner <l.stechauner@proxmox.com>
> ---
>   PVE/CLI/pve6to7.pm | 48 +++++++++++++++++++++++++++++++++++++++++++++-
>   1 file changed, 47 insertions(+), 1 deletion(-)
>
> diff --git a/PVE/CLI/pve6to7.pm b/PVE/CLI/pve6to7.pm
> index 90f92a55..4fe606f3 100644
> --- a/PVE/CLI/pve6to7.pm
> +++ b/PVE/CLI/pve6to7.pm
> @@ -9,6 +9,7 @@ use PVE::API2::LXC;
>   use PVE::API2::Qemu;
>   use PVE::API2::Certificates;
>   
> +use PVE::AccessControl;
>   use PVE::Ceph::Tools;
>   use PVE::Cluster;
>   use PVE::Corosync;
> @@ -16,10 +17,11 @@ use PVE::INotify;
>   use PVE::JSONSchema;
>   use PVE::RPCEnvironment;
>   use PVE::Storage;
> -use PVE::Tools qw(run_command);
> +use PVE::Tools qw(run_command split_list);
>   use PVE::QemuServer;
>   use PVE::VZDump::Common;
>   
> +use File::Slurp;
>   use Term::ANSIColor;
>   
>   use PVE::CLIHandler;
> @@ -601,6 +603,49 @@ sub check_cifs_credential_location {
>       log_pass("no CIFS credentials at outdated location found.") if !$found;
>   }
>   
> +sub check_custom_pool_roles {
> +    log_info("Checking custom roles for pool permissions..");
> +
> +    my $raw = read_file('/etc/pve/user.cfg');
> +
> +    my $roles = {};
> +    while ($raw =~ /^\s*role:(.*?):(.*?):(.*?)\s*$/gm) {
> +	my ($role, $privlist) = ($1, $2);
> +
> +	if (!PVE::AccessControl::verify_rolename($role, 1)) {
> +	    warn "user config - ignore role '$role' - invalid characters in role name\n";
> +	    next;
> +	}
> +
> +	$roles->{$role} = {} if !$roles->{$role};
> +	foreach my $priv (split_list($privlist)) {
> +	    $roles->{$role}->{$priv} = 1;
> +	}
> +    }
> +
> +    foreach my $role (sort keys %{$roles}) {
> +	if (PVE::AccessControl::role_is_special($role)) {
> +	    next;
> +	}
> +
> +	if ($role eq "PVEPoolUser") {
> +	    # the user created a custom role named PVEPoolUser
> +	    log_fail("Custom role '$role' has a restricted name - a built-in role 'PVEPoolUser' will be available with the upgrade");
> +	} else {
> +	    log_pass("Custom role '$role' has no restricted name");
> +	}
> +
> +	my $perms = $roles->{$role};
> +	if ($perms->{'Pool.Allocate'} && $perms->{'Pool.Audit'}) {
> +	    log_pass("Custom role '$role' contains updated pool permissions");
> +	} elsif ($perms->{'Pool.Allocate'}) {
> +	    log_warn("Custom role '$role' contains permission 'Pool.Allocate' - to ensure same behavior add 'Pool.Audit' to this role");
> +	} else {
> +	    log_pass("Custom role '$role' contains no permissions that need to be updated");
> +	}
> +    }
> +}
> +
>   sub check_misc {
>       print_header("MISCELLANEOUS CHECKS");
>       my $ssh_config = eval { PVE::Tools::file_get_contents('/root/.ssh/config') };
> @@ -693,6 +738,7 @@ sub check_misc {
>   
>       check_backup_retention_settings();
>       check_cifs_credential_location();
> +    check_custom_pool_roles();
>   }
>   
>   __PACKAGE__->register_method ({