如何使用Open SAML库读取和解析SAML响应？
<samlp:Response Destination="http://localhost:8090/login/parsesamlresponse"
ID="s2b7c8f9c5cc59a1e9cd2c94e5f0673a3dc3bf9adb" InResponseTo="_768b456244fee16c5f5eccd396441150"
IssueInstant="2017-04-18T09:58:53Z" Version="2.0" xmlns:samlp="urn:oasis:names:tc:SAML:2.0:protocol">
<saml:Issuer xmlns:saml="urn:oasis:names:tc:SAML:2.0:assertion">https://idp.ssocircle.com</saml:Issuer>
<samlp:Status xmlns:samlp="urn:oasis:names:tc:SAML:2.0:protocol">
<samlp:StatusCode Value="urn:oasis:names:tc:SAML:2.0:status:Success"
xmlns:samlp="urn:oasis:names:tc:SAML:2.0:protocol"></samlp:StatusCode>
</samlp:Status>
<saml:Assertion ID="s2bd18a4853da5e4877b1d7fb05b34e64a716b821a" IssueInstant="2017-04-18T09:58:53Z"
Version="2.0" xmlns:saml="urn:oasis:names:tc:SAML:2.0:assertion">
<saml:Issuer>https://idp.ssocircle.com</saml: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/2000/09/xmldsig#rsa-sha1"/>
<ds:Reference URI="#s2bd18a4853da5e4877b1d7fb05b34e64a716b821a">
<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/2000/09/xmldsig#sha1"/>
<ds:DigestValue>0UTWYXT/00+eOatA7JkrFfByNXE=</ds:DigestValue>
</ds:Reference>
</ds:SignedInfo>
<ds:SignatureValue>
dLrZN+V5ULQIwoxbBbGbPJ/WRtgwP4W3AJfPpogjkd+9OXVixUCS8CYjwydPXiUdq/8zArX82J7j
25JlI1URE0D2oqiM74+HYW93jl5GS+3isEv+znEBdG3ZlWJ7pIOLWsUBwqAfZKMI9hNbcDk5i5BK
6Kz5AkKJxRRnqUpgs+7jEPhPE7uUfAd7eqxRi/JGoOC66BSpEYByeTo9dOCasXyljIaF0lWWIAgr
ETEkwYHSJFSY4xDQYfNAneOi69EDVUdNHdx749p2vde4/YuFNUYKJ+NEzCmHI3usvKEnVMjYC92U
DhwM9h50Rri77MJCL+bhIkXhUf3V3hrMskdECQ==
</ds:SignatureValue>
<ds:KeyInfo>
<ds:X509Data>
<ds:X509Certificate>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22/O93f4RFnFab7t23jRFcF0amQUOsDvltfJw7XCal8JdgPUg6TNC4Fy9XYv0OAHc3oDp3vl1Yj8
/1qBg6Rc39kehmD5v8SKYmpE7yFKxDF1ol9DKDG/LvClSvnuVP0b4BWdBAA9aJSFtdNGgEvpEUqG
kJ1osLVqCMvSYsUtHmapaX3hiM9RbX38jsSgsl44Rar5Ioc7KXOOZFGfEKyyUqucYpjWCOXJELAV
Azp7XTvA2q55u31hO0w8Yx4uEQKlmxDuZmxpMz4EWARyjHSAuDKEW1RJvUr6+5uA9qeOKxLiKN1j
o6eWAcl6Wr9MreXR9kFpS6kHllfdVSrJES4ST0uh1Jp4EYgmiyMmFCbUpKXifpsNWCLDenE3hllF
0+q3wIdu+4P82RIM71n7qVgnDnK29wnLhHDat9rkC62CIbonpkVYmnReX0jze+7twRanJOMCJ+lF
g16BDvBcG8u0n/wIDkHHitBI7bU1k6c6DydLQ+69h8SCo6sO9YuD+/3xAGKad4ImZ6vTwlB4zDCp
u6YgQWocWRXE+VkOb+RBfvP755PUaLfL63AFVlpOnEpIio5++UjNJRuPuAA=
</ds:X509Certificate>
</ds:X509Data>
</ds:KeyInfo>
</ds:Signature>
<saml:Subject>
<saml:NameID Format="urn:oasis:names:tc:SAML:2.0:nameid-format:transient"
NameQualifier="https://idp.ssocircle.com">1/hMNpzJNY7/xZ6vkTO0jexaIr3x</saml:NameID>
<saml:SubjectConfirmation Method="urn:oasis:names:tc:SAML:2.0:cm:bearer">
<saml:SubjectConfirmationData InResponseTo="_768b456244fee16c5f5eccd396441150"
NotOnOrAfter="2017-04-18T10:08:53Z" Recipient="http://localhost:8090/login/parsesamlresponse"/></saml:SubjectConfirmation>
</saml:Subject>
<saml:Conditions NotBefore="2017-04-18T09:48:53Z" NotOnOrAfter="2017-04-18T10:08:53Z">
<saml:AudienceRestriction>
<saml:Audience>NAB</saml:Audience>
</saml:AudienceRestriction>
</saml:Conditions>
<saml:AuthnStatement AuthnInstant="2017-04-18T09:58:29Z"
SessionIndex="s26e464ab9344c2d844486cb983c4624d3625f3a01">
<saml:AuthnContext>
<saml:AuthnContextClassRef>urn:oasis:names:tc:SAML:2.0:ac:classes:PasswordProtectedTransport</saml:AuthnContextClassRef>
</saml:AuthnContext>
</saml:AuthnStatement>
</saml:Assertion>
</samlp:Response>