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better checking of dht keys

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License: MIT
Signed-off-by: Jeromy <why@ipfs.io>
This commit is contained in:
Jeromy 2016-07-05 13:24:13 -07:00
parent 3e54fb47a9
commit b56d481080
1 changed files with 6 additions and 1 deletions
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7
routing/record/validation.go
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@ -3,11 +3,13 @@ package record
import (
"bytes"
"errors"
"fmt"
key "github.com/ipfs/go-ipfs/blocks/key"
path "github.com/ipfs/go-ipfs/path"
pb "github.com/ipfs/go-ipfs/routing/dht/pb"
ci "gx/ipfs/QmUWER4r4qMvaCnX5zREcfyiWN7cXN9g3a7fkRqNz8qWPP/go-libp2p-crypto"
mh "gx/ipfs/QmYf7ng2hG5XBtJA3tN34DQ2GUN5HNksEw1rLDkmr6vGku/go-multihash"
u "gx/ipfs/QmZNVWh8LLjAavuQ2JXuFmuYH3C11xo988vSgp7UQrTRj1/go-ipfs-util"
)
@ -73,7 +75,7 @@ func (v Validator) IsSigned(k key.Key) (bool, error) {
// verifies that the passed in record value is the PublicKey
// that matches the passed in key.
func ValidatePublicKeyRecord(k key.Key, val []byte) error {
if len(k) != 38 {
if len(k) < 5 {
return errors.New("invalid public key record key")
}
@ -83,6 +85,9 @@ func ValidatePublicKeyRecord(k key.Key, val []byte) error {
}
keyhash := []byte(k[4:])
if _, err := mh.Cast(keyhash); err != nil {
return fmt.Errorf("key did not contain valid multihash: %s", err)
}
pkh := u.Hash(val)
if !bytes.Equal(keyhash, pkh) {