mirror of
https://github.com/juanfont/headscale.git
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41f6740ddd
tests for that feature. Other fixes: clean up a few typos in comments. Fix a bug that caused the tests to run four times each. Be more consistent in the use of log rather than fmt to print errors and notices.
124 lines
2.9 KiB
Go
124 lines
2.9 KiB
Go
package headscale
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import (
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"crypto/rand"
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"encoding/hex"
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"log"
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"time"
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)
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const errorAuthKeyNotFound = Error("AuthKey not found")
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const errorAuthKeyExpired = Error("AuthKey expired")
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const errorAuthKeyNotReusableAlreadyUsed = Error("AuthKey not reusable already used")
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// PreAuthKey describes a pre-authorization key usable in a particular namespace
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type PreAuthKey struct {
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ID uint64 `gorm:"primary_key"`
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Key string
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NamespaceID uint
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Namespace Namespace
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Reusable bool
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Ephemeral bool `gorm:"default:false"`
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CreatedAt *time.Time
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Expiration *time.Time
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}
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// CreatePreAuthKey creates a new PreAuthKey in a namespace, and returns it
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func (h *Headscale) CreatePreAuthKey(namespaceName string, reusable bool, ephemeral bool, expiration *time.Time) (*PreAuthKey, error) {
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n, err := h.GetNamespace(namespaceName)
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if err != nil {
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return nil, err
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}
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db, err := h.db()
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if err != nil {
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log.Printf("Cannot open DB: %s", err)
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return nil, err
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}
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defer db.Close()
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now := time.Now().UTC()
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kstr, err := h.generateKey()
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if err != nil {
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return nil, err
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}
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k := PreAuthKey{
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Key: kstr,
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NamespaceID: n.ID,
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Namespace: *n,
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Reusable: reusable,
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Ephemeral: ephemeral,
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CreatedAt: &now,
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Expiration: expiration,
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}
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db.Save(&k)
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return &k, nil
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}
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// GetPreAuthKeys returns the list of PreAuthKeys for a namespace
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func (h *Headscale) GetPreAuthKeys(namespaceName string) (*[]PreAuthKey, error) {
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n, err := h.GetNamespace(namespaceName)
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if err != nil {
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return nil, err
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}
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db, err := h.db()
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if err != nil {
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log.Printf("Cannot open DB: %s", err)
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return nil, err
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}
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defer db.Close()
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keys := []PreAuthKey{}
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if err := db.Preload("Namespace").Where(&PreAuthKey{NamespaceID: n.ID}).Find(&keys).Error; err != nil {
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return nil, err
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}
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return &keys, nil
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}
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// checkKeyValidity does the heavy lifting for validation of the PreAuthKey coming from a node
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// If returns no error and a PreAuthKey, it can be used
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func (h *Headscale) checkKeyValidity(k string) (*PreAuthKey, error) {
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db, err := h.db()
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if err != nil {
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return nil, err
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}
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defer db.Close()
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pak := PreAuthKey{}
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if db.Preload("Namespace").First(&pak, "key = ?", k).RecordNotFound() {
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return nil, errorAuthKeyNotFound
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}
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if pak.Expiration != nil && pak.Expiration.Before(time.Now()) {
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return nil, errorAuthKeyExpired
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}
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if pak.Reusable || pak.Ephemeral { // we don't need to check if has been used before
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return &pak, nil
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}
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machines := []Machine{}
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if err := db.Preload("AuthKey").Where(&Machine{AuthKeyID: uint(pak.ID)}).Find(&machines).Error; err != nil {
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return nil, err
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}
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if len(machines) != 0 {
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return nil, errorAuthKeyNotReusableAlreadyUsed
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}
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// missing here validation on current usage
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return &pak, nil
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}
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func (h *Headscale) generateKey() (string, error) {
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size := 24
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bytes := make([]byte, size)
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if _, err := rand.Read(bytes); err != nil {
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return "", err
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}
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return hex.EncodeToString(bytes), nil
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}
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