/// <summary>
/// Checks whether a given claim exists
/// </summary>
/// <param name="principal">The principal.</param>
/// <param name="claimType">Type of the claim.</param>
/// <returns>true/false</returns>
public static bool ClaimExists(this IClaimsPrincipal principal, string claimType)
{
Contract.Requires(principal != null);
Contract.Requires(!String.IsNullOrEmpty(claimType));
return principal.ClaimExists(c =>
c.ClaimType.Equals(claimType, StringComparison.OrdinalIgnoreCase));
}
/// <summary>
/// Checks whether a given claim exists
/// </summary>
/// <param name="identity">The identity.</param>
/// <param name="claimType">Type of the claim.</param>
/// <returns>true/false</returns>
public static bool ClaimExists(this IClaimsIdentity identity, string claimType)
{
Contract.Requires(identity != null);
Contract.Requires(identity.Claims != null);
Contract.Requires(!String.IsNullOrEmpty(claimType));
return identity.ClaimExists(c =>
c.ClaimType.Equals(claimType, StringComparison.OrdinalIgnoreCase));
}
/// <summary>
/// Demands a specific claim.
/// </summary>
/// <param name="identity">The principal.</param>
/// <param name="predicate">The search predicate.</param>
public static void DemandClaim(this IClaimsIdentity identity, Predicate<Claim> predicate)
{
Contract.Requires(identity != null);
Contract.Requires(identity.Claims != null);
Contract.Requires(predicate != null);
if (!identity.ClaimExists(predicate))
{
throw new SecurityException("Demand for Claim failed");
}
}