我正在使用Grails 3.3.9中的Spring Security SAML Grails Plugin。我已经阅读了文档，但我不明白如何为用户分配角色。我以前使用Spring Security Core和LDAP插件的组合来验证用户，现在我转而使用SAML来支持单点登录。在SAML文档中，我看到需要设置以下内容
Property | Syntax | Example Value | Description
userGroupAttribute | String Value | 'memberOf'| Corresponds to the Role Designator in the SAML Assertion from the IDP
userGroupToRoleMapping | Map [Spring Security Role: Saml Assertion Role] | [ROLE_MY_APP_ROLE: 'CN=MYSAMLGROUP, OU=MyAppGroups, DC=myldap, DC=example, DC=com'] | This maps the Spring Security Roles in your application to the roles from the SAML Assertion. Only roles in this Map will be resolved.
在我的代码中，我设置了这样的属性：
grails.plugin.springsecurity.saml.userGroupAttribute = 'Group'
grails.plugin.springsecurity.saml.userGroupToRoleMapping = [ROLE_USER:'CN=USERS,CN=Groups,DC=trknow,DC=com',
ROLE_ADMIN:'CN=ADMINS,OU=Groups,DC=trknow,DC=com']
我使用ADFS作为我的IDP，所有属性都从Microsoft Active Directory中删除。根据我的idp xml文件，userGroupAttribute被命名为'Group'。
<samlp:Response Consent="urn:oasis:names:tc:SAML:2.0:consent:unspecified"
Destination="https://sso.trknow.com:8443/sammy/saml/SSO"
ID="_59831374-4e0c-4664-8431-016293d16ecb" IssueInstant="2019-03-29T19:03:00.075Z" Version="2.0"
xmlns:samlp="urn:oasis:names:tc:SAML:2.0:protocol">
<Issuer xmlns="urn:oasis:names:tc:SAML:2.0:assertion">http://federation.trknow.com/adfs/services/trust</Issuer>
<samlp:Status><samlp:StatusCode Value="urn:oasis:names:tc:SAML:2.0:status:Success"/></samlp:Status>
<Assertion ID="_8a9e9831-1d74-4e74-a5ee-928f3739c663" IssueInstant="2019-03-29T19:03:00.074Z"
Version="2.0" xmlns="urn:oasis:names:tc:SAML:2.0:assertion">
<Issuer>http://federation.trknow.com/adfs/services/trust</Issuer>
<ds:Signature xmlns:ds="http://www.w3.org/2000/09/xmldsig#">
<ds:SignedInfo><ds:CanonicalizationMethod Algorithm="http://www.w3.org/2001/10/xml-exc-c14n#"/><ds:SignatureMethod Algorithm="http://www.w3.org/2001/04/xmldsig-more#rsa-sha256"/>
<ds:Reference URI="#_8a9e9831-1d74-4e74-a5ee-928f3739c663">
<ds:Transforms><ds:Transform Algorithm="http://www.w3.org/2000/09/xmldsig#enveloped-signature"/><ds:Transform Algorithm="http://www.w3.org/2001/10/xml-exc-c14n#"/></ds:Transforms><ds:DigestMethod Algorithm="http://www.w3.org/2001/04/xmlenc#sha256"/>
<ds:DigestValue>hAeKlB*Truncated*</ds:DigestValue>
</ds:Reference>
</ds:SignedInfo>
<ds:SignatureValue>Umiu*Truncated*</ds:SignatureValue>
<KeyInfo xmlns="http://www.w3.org/2000/09/xmldsig#">
<ds:X509Data>
<ds:X509Certificate>MIIC5*Truncated*</ds:X509Certificate>
</ds:X509Data>
</KeyInfo>
</ds:Signature>
<Subject>
<NameID>john.willi</NameID>
<SubjectConfirmation Method="urn:oasis:names:tc:SAML:2.0:cm:bearer"><SubjectConfirmationData NotOnOrAfter="2019-03-29T19:08:00.075Z"
Recipient="https://sso.trknow.com:8443/sammy/saml/SSO"/></SubjectConfirmation>
</Subject>
<Conditions NotBefore="2019-03-29T19:03:00.066Z" NotOnOrAfter="2019-03-29T20:03:00.066Z">
<AudienceRestriction>
<Audience>sso.sammy.com</Audience>
</AudienceRestriction>
</Conditions>
<AttributeStatement>
<Attribute Name="http://schemas.xmlsoap.org/ws/2005/05/identity/claims/emailaddress">
<AttributeValue>[email protected]</AttributeValue>
</Attribute>
<Attribute Name="http://schemas.xmlsoap.org/ws/2005/05/identity/claims/surname">
<AttributeValue>Williams</AttributeValue>
</Attribute>
<Attribute Name="http://schemas.xmlsoap.org/ws/2005/05/identity/claims/givenname">
<AttributeValue>John</AttributeValue>
</Attribute>
<Attribute Name="http://schemas.xmlsoap.org/claims/Group">
<AttributeValue>CN=ADMINS,OU=Groups,DC=trknow,DC=com</AttributeValue>
</Attribute>
<Attribute Name="http://schemas.microsoft.com/ws/2008/06/identity/claims/groupsid">
<AttributeValue>CN=ADMINS,OU=Groups,DC=trknow,DC=com</AttributeValue>
</Attribute>
<Attribute Name="http://schemas.microsoft.com/ws/2008/06/identity/claims/role">
<AttributeValue>ROLE_ADMIN</AttributeValue>
</Attribute>
</AttributeStatement>
<AuthnStatement AuthnInstant="2019-03-29T19:02:55.635Z"
SessionIndex="_8a9e9831-1d74-4e74-a5ee-928f3739c663">
<AuthnContext>
<AuthnContextClassRef>urn:oasis:names:tc:SAML:2.0:ac:classes:PasswordProtectedTransport</AuthnContextClassRef>
</AuthnContext>
</AuthnStatement>
</Assertion>
</samlp:Response>
我为saml插件启用了调试功能。当我进行身份验证时，我发现它分配了0个权限。到底是怎么回事？
2019-03-29 15:03:09.869 DEBUG --- [nio-8443-exec-9] o.g.p.s.s.SpringSamlUserDetailsService : UserClass class sammy.User
2019-03-29 15:03:09.878 DEBUG --- [nio-8443-exec-9] o.g.p.s.s.SpringSamlUserDetailsService : Generated User john.willi
2019-03-29 15:03:09.880 DEBUG --- [nio-8443-exec-9] o.g.p.s.s.SpringSamlUserDetailsService : Loading database roles for john.willi...
2019-03-29 15:03:09.890 DEBUG --- [nio-8443-exec-9] o.g.p.s.s.SpringSamlUserDetailsService : Returning Authorities with 0 Authorities Added
2019-03-29 15:03:09.890 DEBUG --- [nio-8443-exec-9] o.g.p.s.s.SpringSamlUserDetailsService : User Class class sammy.User
2019-03-29 15:03:09.890 DEBUG --- [nio-8443-exec-9] o.g.p.s.s.SpringSamlUserDetailsService : User - username john.willi
2019-03-29 15:03:09.890 DEBUG --- [nio-8443-exec-9] o.g.p.s.s.SpringSamlUserDetailsService : User - id null
2019-03-29 15:03:09.902 DEBUG --- [nio-8443-exec-9] o.g.p.s.s.SpringSamlUserDetailsService : User Details grails.plugin.springsecurity.userdetails.GrailsUser@492ab3cb: Username: john.willi; Password: [PROTECTED]; Enabled: true; AccountNonExpired: true; credentialsNonExpired: true; AccountNonLocked: true; Not granted any authorities
检查SpringSamlUserDetailsService并查看它如何添加GrantedAuthority。是使用Group或Role元素添加GrantedAuthority吗？也许它希望将一个group属性作为元素的名称http://schemas.xmlsoap.org/claims/Group而不仅仅是“Group”。