diff options
Diffstat (limited to 'src/cryptography/hazmat/primitives/asymmetric/utils.py')
| -rw-r--r-- | src/cryptography/hazmat/primitives/asymmetric/utils.py | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/src/cryptography/hazmat/primitives/asymmetric/utils.py b/src/cryptography/hazmat/primitives/asymmetric/utils.py index 0140e6c1..a1a40292 100644 --- a/src/cryptography/hazmat/primitives/asymmetric/utils.py +++ b/src/cryptography/hazmat/primitives/asymmetric/utils.py @@ -17,6 +17,10 @@ class _DSSSigValue(univ.Sequence): def decode_rfc6979_signature(signature): data = decoder.decode(signature, asn1Spec=_DSSSigValue()) + if data[1]: + raise ValueError( + "The signature contains bytes after the end of the ASN.1 sequence." + ) r = int(data[0].getComponentByName('r')) s = int(data[0].getComponentByName('s')) return (r, s) |