DesKeyGenerator
using Org.BouncyCastle.Crypto.Parameters;
using Org.BouncyCastle.Security;
using System;
namespace Org.BouncyCastle.Crypto.Generators
{
public class DesKeyGenerator : CipherKeyGenerator
{
public DesKeyGenerator()
{
}
internal DesKeyGenerator(int defaultStrength)
: base(defaultStrength)
{
}
protected override void EngineInit(KeyGenerationParameters parameters)
{
base.EngineInit(parameters);
if (strength == 0 || strength == 7)
strength = 8;
else if (strength != 8) {
throw new ArgumentException("DES key must be " + 64.ToString() + " bits long.");
}
}
protected override byte[] EngineGenerateKey()
{
byte[] array = new byte[8];
do {
random.NextBytes(array);
DesParameters.SetOddParity(array);
} while (DesParameters.IsWeakKey(array, 0));
return array;
}
protected override KeyParameter EngineGenerateKeyParameter()
{
return KeyParameter.Create(strength, random, delegate(Span<byte> bytes, SecureRandom random) {
do {
random.NextBytes(bytes);
DesParameters.SetOddParity(bytes);
} while (DesParameters.IsWeakKey(bytes));
});
}
}
}