/// <summary>
/// Initializes a new instance of the <see cref="DsaDigitalSignature" /> class.
/// </summary>
/// <param name="key">The DSA key.</param>
/// <exception cref="System.ArgumentNullException">key</exception>
public DsaDigitalSignature(DsaKey key)
{
if (key == null)
{
throw new ArgumentNullException("key");
}
this._key = key;
this._hash = HashAlgorithmFactory.CreateSHA1();
}
/// <summary>
/// Initializes a new instance of the <see cref="RsaDigitalSignature"/> class.
/// </summary>
/// <param name="rsaKey">The RSA key.</param>
public RsaDigitalSignature(RsaKey rsaKey)
: base(new ObjectIdentifier(1, 3, 14, 3, 2, 26), new RsaCipher(rsaKey))
{
_hash = HashAlgorithmFactory.CreateSHA1();
}