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SAML tokens carry statements that are sets of claims made by one entity about another entity.
For example, in federated security scenarios, the statements are made by a security token service about a user in the system.
XMLSignature Wrapping attacks (XSW) in SAML based applications like open saml Secure validation of SAML assertions SAML document validation consists of the following steps: 1.
Parsing the XML document, which includes structure validation based on supplied schema; 2.
This proof satisfies the relying party that the SAML token was, in fact, issued to that user.
For example, in a typical scenario: In WCF, statements in SAML tokens are modeled as Saml Attribute objects, which can be populated directly from Claim objects, provided the Claim object has a Right property of Possess Property and the Resource property is of type String.
p EF x VQ3DNY5U/ohrh U1HL5JMd UFmp Iap Ed78b F9BHRuh Vs Jf28LCONRea M9zm BF2w Fx1FU7w Sc WO2oo UBl39g XVUi CTtb IOflwr Hwyb Lq NA5k Amssvsucwdw ZGNOAle N6/P1iqe PGh Db/u9VGff CTKq4ZPON93j2y1i X3XUw Vih Alyy48o Fzart/xt4MZVEMjc6s4Z8q MJ2256gjj IDPLBC73du NLFnk If Hc Esxr AR/v Fv TT1p7e Pzx3sb Gv1Zjrh AUVV1ZGx Ojt/NZp UAea IWTbex4UIt XSYwuhes F83Lmw Fuy63Kiwt1cf DUfx Wo PLMf GVDf5SRZ6N8ydp GQH2g== AAA LOGIN_FAILED 378 0 : User user2 - Client_ip 10.252.112.191 - Failure_reason "External authentication server denied access" - Browser Mozilla/5.0 (Windows NT 6.3; WOW64) Apple Web Kit/537.36 (KHTML, like Gecko) Chrome/35.0.1916.153 Safari/537.36 AAATM Message 383 0 : "SAMLIDP: Checking whether current flow is SAML Id P flow, input U0FNTEl EUDEAMz M5N2Y4Mm Y3YTRh YWMy OTEy YWIz Mm Rm MTg3Yj Zi YWNk MDVOTct Yjkw Yz Uy ZTA0MTBj Jk Zvcm Nl QXV0a G49Zm Fsc2UA" AAATM Message 384 0 : "No certificate found for signing assertion, trying to send unsigned assertion" AAATM Message 452 0 : "SAML verify digest: digest algorithm 1, input for digest: The following message is seen when an SAML response assertion is successfully sent to the SP: AAATM Message 516 0 : "SAMLIDP: Successfully sent assertion to " For troubleshooting in SP side, use siteminder agent/SPS and siteminder server logs (and samtracedefault.log).
Validation can be done in two ways; validation of XML, during parsing or after marshalling, or validation of the SAMLObjects.
When SAML tokens are received in messages, the various statements in the SAML token are turned into IAuthorization Policy objects that are placed into the Authorization Context.