private static bool TryReadAttributeAs <T>(this XmlReader reader, string name, Func <string, T> convert, out T value)
{
if (!reader.TryReadAttribute(name, out var str))
{
return(Out.False(out value));
}
value = convert(str);
return(value != null);
}
public static bool TryReadElementContent(this XmlReader reader, string name, string ns, out string content)
{
if (!reader.IsStartElement(name, ns))
{
return(Out.False(out content));
}
var value = reader.ReadElementContentAsString();
content = value;
return(true);
}
protected virtual bool TryReadTokenType(XmlDictionaryReader reader, out Uri tokenType)
{
if (!reader.IsStartElement(Elements.TokenType, Namespace))
{
return(Out.False(out tokenType));
}
_ = reader.TryReadAttributeAsUri(Attributes.Uri, out var uri);
_ = reader.ReadOuterXml();
tokenType = uri;
return(true);
}
protected virtual bool TryReadClaimDialect(XmlDictionaryReader reader, out Uri claimDialect)
{
if (!reader.IsStartElement(Elements.ClaimDialect, Namespace))
{
return(Out.False(out claimDialect));
}
_ = reader.TryReadAttributeAsUri(Attributes.Uri, out var uri);
_ = reader.ReadOuterXml();
claimDialect = uri;
return(true);
}
public virtual bool TryReadEndpointReference(XmlDictionaryReader reader, out EndpointReference endpointReference)
{
if (!reader.IsStartElement(Elements.EndpointReference, Namespace))
{
return(Out.False(out endpointReference));
}
var endpoint = new EndpointReference();
ReadEndpointReferenceAttributes(reader, endpoint);
reader.ForEachChild(r => TryReadEndpointReferenceChild(r, endpoint));
endpointReference = endpoint;
return(true);
}
protected virtual bool TryReadAddress(XmlDictionaryReader reader, out Uri address)
{
if (!reader.TryReadElementContent(Elements.Address, Namespace, out var content))
{
return(Out.False(out address));
}
if (!Uri.IsWellFormedUriString(content, UriKind.Absolute))
{
return(Out.True(null, out address));
}
address = new Uri(content, UriKind.Absolute);
return(true);
}
protected virtual bool TryReadAutomaticPseudonyms(XmlDictionaryReader reader, out bool?automaticPseudonyms)
{
if (!reader.TryReadElementContent(Elements.AutomaticPseudonyms, Namespace, out var content))
{
return(Out.False(out automaticPseudonyms));
}
if (!bool.TryParse(content, out var parsed))
{
// The element has been read, but the contents of the element wasn't a valid boolean value. Default to false.
return(Out.True(false, out automaticPseudonyms));
}
automaticPseudonyms = parsed;
return(true);
}
public virtual bool TryReadClaimType(XmlDictionaryReader reader, out ClaimType claimType)
{
if (!reader.IsStartElement(Elements.ClaimType, Namespace))
{
return(Out.False(out claimType));
}
if (!reader.TryReadAttributeAsUri(Attributes.Uri, out var uri))
{
throw new InvalidOperationException($"Element {Elements.ClaimType} must have a valid {Attributes.Uri} attribute.");
}
var type = new ClaimType(uri);
if (reader.TryReadAttributeAsBoolean(Attributes.Optional, out var optional))
{
type.Optional = optional;
}
reader.ForEachChild(r =>
{
if (r.TryReadElementContent(Elements.DisplayName, Namespace, out var displayName))
{
type.DisplayName = displayName;
}
else if (r.TryReadElementContent(Elements.Description, Namespace, out var description))
{
type.Description = description;
}
else if (r.TryReadElementContent(Elements.DisplayValue, Namespace, out var displayValue))
{
type.DisplayValue = displayValue;
}
else if (r.TryReadElementContent(Elements.Value, Namespace, out var value))
{
type.Value = value;
}
else
{
return(false);
}
return(true);
});
claimType = type;
return(true);
}
protected virtual bool TryReadTokenTypesOffered(XmlDictionaryReader reader, out List <Uri> tokenTypes)
{
if (!reader.IsStartElement(Elements.TokenTypesOffered, Namespace))
{
return(Out.False(out tokenTypes));
}
var list = new List <Uri>();
reader.ForEachChild(r =>
{
if (TryReadTokenType(reader, out var tokenType))
{
list.Add(tokenType);
return(true);
}
return(false);
});
tokenTypes = list;
return(true);
}
protected virtual bool TryReadLogicalServiceNamesOffered(XmlDictionaryReader reader, out List <Uri> logicalServiceNamesOffered)
{
if (!reader.IsStartElement(Elements.LogicalServiceNamesOffered, Namespace))
{
return(Out.False(out logicalServiceNamesOffered));
}
var list = new List <Uri>();
reader.ForEachChild(r =>
{
if (TryReadIssuerName(reader, out var issuerName))
{
list.Add(issuerName);
return(true);
}
return(false);
});
logicalServiceNamesOffered = list;
return(true);
}
protected virtual bool TryReadClaimTypes(XmlDictionaryReader reader, string name, string ns, out List <ClaimType> claimTypes)
{
if (!reader.IsStartElement(name, ns))
{
return(Out.False(out claimTypes));
}
var list = new List <ClaimType>();
reader.ForEachChild(r =>
{
if (WsAuthorizationSerializer.TryReadClaimType(reader, out var claimType))
{
list.Add(claimType);
return(true);
}
return(false);
});
claimTypes = list;
return(true);
}
protected virtual bool TryReadClaimDialectsOffered(XmlDictionaryReader reader, out List <Uri> claimDialectsOffered)
{
if (!reader.IsStartElement(Elements.ClaimDialectsOffered, Namespace))
{
return(Out.False(out claimDialectsOffered));
}
var list = new List <Uri>();
reader.ForEachChild(r =>
{
if (TryReadClaimDialect(reader, out var claimDialect))
{
list.Add(claimDialect);
return(true);
}
return(false);
});
claimDialectsOffered = list;
return(true);
}
public virtual bool TryReadEndpointReferenceCollection(XmlDictionaryReader reader, string name, string ns, out EndpointReferenceCollection endpointReferenceCollection)
{
if (!reader.IsStartElement(name, ns))
{
return(Out.False(out endpointReferenceCollection));
}
var collection = new EndpointReferenceCollection();
reader.ForEachChild(r =>
{
if (TryReadEndpointReference(r, out var endpointReference))
{
collection.Add(endpointReference);
return(true);
}
return(false);
});
endpointReferenceCollection = collection;
return(true);
}
protected override bool TryReadRoleDescriptor(XmlDictionaryReader reader, out RoleDescriptor role)
{
if (!reader.IsStartElement(Saml2MetadataConstants.Elements.RoleDescriptor, Saml2MetadataConstants.Namespace))
{
return(Out.False(out role));
}
var d = null as RoleDescriptor;
if (reader.TryReadFederationEndpointType(out var type))
{
if (type == FederationEndpointType.ApplicationService)
{
d = new ApplicationServiceDescriptor();
}
if (type == FederationEndpointType.AttributeService)
{
d = new AttributeServiceDescriptor();
}
if (type == FederationEndpointType.PseudonymService)
{
d = new PseudonymServiceDescriptor();
}
if (type == FederationEndpointType.SecurityTokenService)
{
d = new SecurityTokenServiceDescriptor();
}
}
if (d == null)
{
d = new RoleDescriptor();
}
ReadRoleDescriptorAttributes(reader, d);
reader.ForEachChild(r => TryReadRoleDescriptorChild(r, d), out var signature);
d.Signature = signature;
role = d;
return(true);
}
public static bool TryReadFederationEndpointType(this XmlDictionaryReader reader, out FederationEndpointType type)
{
if (!reader.TryReadAttribute(XsiConstants.Attributes.Type, XsiConstants.Namespace, out var value))
{
return(Out.False(out type));
}
if (value.IndexOf(':') < 0)
{
return(Out.False(out type));
}
var split = value.Split(':');
if (split.Length != 2)
{
return(Out.False(out type));
}
var prefix = split[0];
var ns = reader.LookupNamespace(prefix);
if (string.IsNullOrEmpty(ns))
{
return(Out.False(out type));
}
if (ns != WsFederationConstants.Namespace)
{
return(Out.False(out type));
}
var typeName = split[1];
if (typeName.EndsWith("Type"))
{
typeName = typeName.Remove(typeName.Length - 4);
}
return(Enum.TryParse(typeName, out type));
}