diff options
Diffstat (limited to 'crypto/src/asn1/DerInteger.cs')
| -rw-r--r-- | crypto/src/asn1/DerInteger.cs | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/crypto/src/asn1/DerInteger.cs b/crypto/src/asn1/DerInteger.cs index 3610de588..5b240d281 100644 --- a/crypto/src/asn1/DerInteger.cs +++ b/crypto/src/asn1/DerInteger.cs @@ -70,7 +70,18 @@ namespace Org.BouncyCastle.Asn1 public DerInteger( byte[] bytes) { - this.bytes = bytes; + if (bytes.Length > 1) + { + if (bytes[0] == 0 && (bytes[1] & 0x80) == 0) + { + throw new ArgumentException("malformed integer"); + } + if (bytes[0] == (byte)0xff && (bytes[1] & 0x80) != 0) + { + throw new ArgumentException("malformed integer"); + } + } + this.bytes = Arrays.Clone(bytes); } public BigInteger Value |