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db_deptoken.go
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db_deptoken.go
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package builtin
import (
"bytes"
"context"
"crypto/rsa"
"crypto/x509"
"encoding/json"
"github.com/boltdb/bolt"
"github.com/micromdm/micromdm/pkg/crypto"
"github.com/micromdm/micromdm/platform/config"
)
const (
depTokenBucket = "mdm.DEPToken"
)
func (db *DB) AddToken(consumerKey string, json []byte) error {
err := db.Update(func(tx *bolt.Tx) error {
b, err := tx.CreateBucketIfNotExists([]byte(depTokenBucket))
if err != nil {
return err
}
return b.Put([]byte(consumerKey), json)
})
if err != nil {
return err
}
if err := db.Publisher.Publish(context.TODO(), config.DEPTokenTopic, json); err != nil {
return err
}
return nil
}
func (db *DB) DEPTokens() ([]config.DEPToken, error) {
var result []config.DEPToken
err := db.View(func(tx *bolt.Tx) error {
b := tx.Bucket([]byte(depTokenBucket))
if b == nil {
return nil
}
c := b.Cursor()
prefix := []byte("CK_")
for k, v := c.Seek(prefix); k != nil && bytes.HasPrefix(k, prefix); k, v = c.Next() {
var depToken config.DEPToken
err := json.Unmarshal(v, &depToken)
if err != nil {
// TODO: log problematic DEP token, or remove altogether?
continue
}
result = append(result, depToken)
}
return nil
})
return result, err
}
func (db *DB) DEPKeypair() (key *rsa.PrivateKey, cert *x509.Certificate, err error) {
var keyBytes, certBytes []byte
err = db.View(func(tx *bolt.Tx) error {
b := tx.Bucket([]byte(depTokenBucket))
if b == nil {
return nil
}
keyBytes = b.Get([]byte("key"))
certBytes = b.Get([]byte("certificate"))
return nil
})
if err != nil {
return
}
if keyBytes == nil || certBytes == nil {
// if there is no certificate or private key then generate
key, cert, err = generateAndStoreDEPKeypair(db)
} else {
key, err = x509.ParsePKCS1PrivateKey(keyBytes)
if err != nil {
return
}
cert, err = x509.ParseCertificate(certBytes)
if err != nil {
return
}
}
return
}
func generateAndStoreDEPKeypair(db *DB) (key *rsa.PrivateKey, cert *x509.Certificate, err error) {
key, cert, err = crypto.SimpleSelfSignedRSAKeypair("micromdm-dep-token", 365)
if err != nil {
return
}
pkBytes := x509.MarshalPKCS1PrivateKey(key)
certBytes := cert.Raw
err = db.Update(func(tx *bolt.Tx) error {
b, err := tx.CreateBucketIfNotExists([]byte(depTokenBucket))
if err != nil {
return err
}
err = b.Put([]byte("key"), pkBytes)
if err != nil {
return err
}
err = b.Put([]byte("certificate"), certBytes)
if err != nil {
return err
}
return nil
})
return
}