/// <summary>
/// Creates a new association of a given type at an OpenID Provider.
/// </summary>
/// <param name="protocol">The protocol.</param>
/// <param name="associationType">Type of the association (i.e. HMAC-SHA1 or HMAC-SHA256)</param>
/// <param name="associationUse">A value indicating whether the new association will be used privately by the Provider for "dumb mode" authentication
/// or shared with the Relying Party for "smart mode" authentication.</param>
/// <param name="associationStore">The Provider's association store.</param>
/// <param name="securitySettings">The security settings of the Provider.</param>
/// <returns>
/// The newly created association.
/// </returns>
/// <remarks>
/// The new association is NOT automatically put into an association store. This must be done by the caller.
/// </remarks>
internal static HmacShaAssociation Create(Protocol protocol, string associationType, AssociationRelyingPartyType associationUse, IProviderAssociationStore associationStore, ProviderSecuritySettings securitySettings)
{
Requires.NotNull(protocol, "protocol");
Requires.NotNullOrEmpty(associationType, "associationType");
Requires.NotNull(associationStore, "associationStore");
Requires.NotNull(securitySettings, "securitySettings");
int secretLength = HmacShaAssociation.GetSecretLength(protocol, associationType);
// Generate the secret that will be used for signing
byte[] secret = MessagingUtilities.GetCryptoRandomData(secretLength);
TimeSpan lifetime;
if (associationUse == AssociationRelyingPartyType.Smart)
{
if (!securitySettings.AssociationLifetimes.TryGetValue(associationType, out lifetime))
{
lifetime = DefaultMaximumLifetime;
}
}
else
{
lifetime = HmacShaAssociation.DumbSecretLifetime;
}
string handle = associationStore.Serialize(secret, DateTime.UtcNow + lifetime, associationUse == AssociationRelyingPartyType.Dumb);
Assumes.True(protocol != null); // All the way up to the method call, the condition holds, yet we get a Requires failure next
Assumes.True(secret != null);
Assumes.True(!string.IsNullOrEmpty(associationType));
var result = HmacShaAssociation.Create(protocol, associationType, handle, secret, lifetime);
return(result);
}
/// <summary>
/// Creates a new association of a given type at an OpenID Provider.
/// </summary>
/// <param name="protocol">The protocol.</param>
/// <param name="associationType">Type of the association (i.e. HMAC-SHA1 or HMAC-SHA256)</param>
/// <param name="associationUse">A value indicating whether the new association will be used privately by the Provider for "dumb mode" authentication
/// or shared with the Relying Party for "smart mode" authentication.</param>
/// <param name="associationStore">The Provider's association store.</param>
/// <param name="securitySettings">The security settings of the Provider.</param>
/// <returns>
/// The newly created association.
/// </returns>
/// <remarks>
/// The new association is NOT automatically put into an association store. This must be done by the caller.
/// </remarks>
internal static HmacShaAssociation Create(Protocol protocol, string associationType, AssociationRelyingPartyType associationUse, IProviderAssociationStore associationStore, ProviderSecuritySettings securitySettings) {
Requires.NotNull(protocol, "protocol");
Requires.NotNullOrEmpty(associationType, "associationType");
Requires.NotNull(associationStore, "associationStore");
Requires.NotNull(securitySettings, "securitySettings");
Contract.Ensures(Contract.Result<HmacShaAssociation>() != null);
int secretLength = HmacShaAssociation.GetSecretLength(protocol, associationType);
// Generate the secret that will be used for signing
byte[] secret = MessagingUtilities.GetCryptoRandomData(secretLength);
TimeSpan lifetime;
if (associationUse == AssociationRelyingPartyType.Smart) {
if (!securitySettings.AssociationLifetimes.TryGetValue(associationType, out lifetime)) {
lifetime = DefaultMaximumLifetime;
}
} else {
lifetime = HmacShaAssociation.DumbSecretLifetime;
}
string handle = associationStore.Serialize(secret, DateTime.UtcNow + lifetime, associationUse == AssociationRelyingPartyType.Dumb);
Contract.Assert(protocol != null); // All the way up to the method call, the condition holds, yet we get a Requires failure next
Contract.Assert(secret != null);
Contract.Assert(!string.IsNullOrEmpty(associationType));
var result = HmacShaAssociation.Create(protocol, associationType, handle, secret, lifetime);
return result;
}
