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|
package challengestore
import (
"crypto/rand"
"encoding/base64"
"fmt"
bolt "go.etcd.io/bbolt"
"github.com/pkg/errors"
)
type Depot struct {
*bolt.DB
}
const challengeBucket = "scep_challenges"
// NewBoltDepot creates a depot.Depot backed by BoltDB.
func NewBoltDepot(db *bolt.DB) (*Depot, error) {
err := db.Update(func(tx *bolt.Tx) error {
_, err := tx.CreateBucketIfNotExists([]byte(challengeBucket))
if err != nil {
return fmt.Errorf("create bucket: %s", err)
}
return nil
})
if err != nil {
return nil, err
}
return &Depot{db}, nil
}
func (db *Depot) SCEPChallenge() (string, error) {
key := make([]byte, 24)
_, err := rand.Read(key)
if err != nil {
return "", err
}
challenge := base64.StdEncoding.EncodeToString(key)
err = db.Update(func(tx *bolt.Tx) error {
bucket := tx.Bucket([]byte(challengeBucket))
if bucket == nil {
return fmt.Errorf("bucket %q not found!", challengeBucket)
}
return bucket.Put([]byte(challenge), []byte(challenge))
})
if err != nil {
return "", err
}
return challenge, nil
}
func (db *Depot) HasChallenge(pw string) (bool, error) {
tx, err := db.Begin(true)
if err != nil {
return false, errors.Wrap(err, "begin transaction")
}
bkt := tx.Bucket([]byte(challengeBucket))
if bkt == nil {
return false, fmt.Errorf("bucket %q not found!", challengeBucket)
}
key := []byte(pw)
var matches bool
if chal := bkt.Get(key); chal != nil {
if err := bkt.Delete(key); err != nil {
return false, err
}
matches = true
}
return matches, tx.Commit()
}
|
