/// <summary> /// The string to pass as the assoc_type value in the OpenID protocol. /// </summary> /// <param name="protocol">The protocol version of the message that the assoc_type value will be included in.</param> /// <returns>The value that should be used for the openid.assoc_type parameter.</returns> internal abstract string GetAssociationType(Protocol protocol);
/// <summary>
/// Gets the OpenID protocol instance for the version in a message.
/// </summary>
/// <param name="message">The message.</param>
/// <returns>The OpenID protocol instance.</returns>
internal static Protocol GetProtocol(this IProtocolMessage message)
{
Requires.NotNull(message, "message");
return(Protocol.Lookup(message.Version));
}
/// <summary>
/// Determines whether a named association fits the security requirements.
/// </summary>
/// <param name="protocol">The protocol carrying the association.</param>
/// <param name="associationType">The value of the openid.assoc_type parameter.</param>
/// <returns>
/// <c>true</c> if the association is permitted given the security requirements; otherwise, <c>false</c>.
/// </returns>
internal bool IsAssociationInPermittedRange(Protocol protocol, string associationType)
{
int lengthInBits = HmacShaAssociation.GetSecretLength(protocol, associationType) * 8;
return(lengthInBits >= this.MinimumHashBitLength && lengthInBits <= this.MaximumHashBitLength);
}