diff options
Diffstat (limited to 'crypto/src/crypto/agreement/ECDHCBasicAgreement.cs')
| -rw-r--r-- | crypto/src/crypto/agreement/ECDHCBasicAgreement.cs | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/crypto/src/crypto/agreement/ECDHCBasicAgreement.cs b/crypto/src/crypto/agreement/ECDHCBasicAgreement.cs index 89be7061e..1c9ae45f9 100644 --- a/crypto/src/crypto/agreement/ECDHCBasicAgreement.cs +++ b/crypto/src/crypto/agreement/ECDHCBasicAgreement.cs @@ -29,7 +29,7 @@ namespace Org.BouncyCastle.Crypto.Agreement public class ECDHCBasicAgreement : IBasicAgreement { - private ECPrivateKeyParameters key; + private ECPrivateKeyParameters privKey; public virtual void Init( ICipherParameters parameters) @@ -39,12 +39,12 @@ namespace Org.BouncyCastle.Crypto.Agreement parameters = ((ParametersWithRandom) parameters).Parameters; } - this.key = (ECPrivateKeyParameters)parameters; + this.privKey = (ECPrivateKeyParameters)parameters; } public virtual int GetFieldSize() { - return (key.Parameters.Curve.FieldSize + 7) / 8; + return (privKey.Parameters.Curve.FieldSize + 7) / 8; } public virtual BigInteger CalculateAgreement( @@ -52,8 +52,10 @@ namespace Org.BouncyCastle.Crypto.Agreement { ECPublicKeyParameters pub = (ECPublicKeyParameters) pubKey; ECDomainParameters parameters = pub.Parameters; + if (!parameters.Equals(privKey.Parameters)) + throw new InvalidOperationException("ECDHC public key has wrong domain parameters"); - BigInteger hd = parameters.H.Multiply(key.D).Mod(parameters.N); + BigInteger hd = parameters.H.Multiply(privKey.D).Mod(parameters.N); ECPoint P = pub.Q.Multiply(hd).Normalize(); |