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2deff6b6e1
The URL to fetch the configuration for a talos node is given by the
talos.config kernel parameter. We add support for 4 variables ${uuid},
${serial}, ${mac} and ${hostname} which substitute the device UUID,
DMI-sourced serial number, MAC address of the first network interface to
be up and the hostname respectively.
Fixes #3272
Signed-off-by: Philipp Sauter <philipp.sauter@siderolabs.com>
51 lines
1.2 KiB
Go
51 lines
1.2 KiB
Go
// This Source Code Form is subject to the terms of the Mozilla Public
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// License, v. 2.0. If a copy of the MPL was not distributed with this
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// file, You can obtain one at http://mozilla.org/MPL/2.0/.
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package keys
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import (
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"fmt"
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"github.com/talos-systems/talos/internal/pkg/smbios"
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)
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// NodeIDKeyHandler generates the key based on current node information
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// and provided template string.
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type NodeIDKeyHandler struct{}
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// NewNodeIDKeyHandler creates new NodeIDKeyHandler.
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func NewNodeIDKeyHandler() (*NodeIDKeyHandler, error) {
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return &NodeIDKeyHandler{}, nil
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}
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// GetKey implements KeyHandler interface.
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func (h *NodeIDKeyHandler) GetKey(options ...KeyOption) ([]byte, error) {
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opts, err := NewDefaultOptions(options)
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if err != nil {
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return nil, err
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}
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s, err := smbios.GetSMBIOSInfo()
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if err != nil {
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return nil, err
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}
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machineUUID := s.SystemInformation.UUID
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if machineUUID == "" {
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return nil, fmt.Errorf("machine UUID is not populated %s", machineUUID)
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}
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// primitive entropy check
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counts := map[rune]int{}
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for _, s := range machineUUID {
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counts[s]++
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if counts[s] > len(machineUUID)/2 {
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return nil, fmt.Errorf("machine UUID %s entropy check failed", machineUUID)
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}
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}
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return []byte(machineUUID + opts.PartitionLabel), nil
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}
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