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SecurityTokenService.ValidateRequest Method

.NET Framework 4.5

Validates the security token request (RST) encapsulated by this instance.

Namespace:  System.IdentityModel
Assembly:  System.IdentityModel (in System.IdentityModel.dll)

protected virtual void ValidateRequest(
	RequestSecurityToken request


Type: System.IdentityModel.Protocols.WSTrust.RequestSecurityToken

A RequestSecurityToken that represents the request.


request is null.


The RequestType property of the request is not set to RequestTypes.Issue.


The KeyType property of the request is not null or one of the constants defined in the System.IdentityModel.Protocols.WSTrust.KeyTypes class.


The KeyType of the request is Bearer and the KeySize element is present, but its value is not equal to zero.


The STS does not support the request token type (based on the value of the TokenType property of the request).

The ValidateRequest method is called from the token issuance pipeline (the Issue method) to validate the incoming RST. The RST is validated against the requirements (policy) of the STS and an appropriate exception is thrown if it is not valid.

The default implementation of the SecurityTokenService class supports only the RST-RSTR pattern and only the Issue binding of the WS-Trust specification (the RequestType property of the request must be set to RequestTypes.Issue). The default implementation of this method enforces these requirements (and others noted in the exceptions section). You can override this method if you must enforce different validation requirements for your custom STS.

.NET Framework

Supported in: 4.6, 4.5

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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