解碼SAML 2.0 64Base字符串

我一直在開發SAML 2.0 SSO。我在解碼64Base字符串時遇到問題，將其轉換爲xml，然後再讀取內容。解碼SAML 2.0 64Base字符串

下面是我一直使用的代碼：

Protected Function uf_getIDFromSAMLRequest(ByVal as_samlRequest As String) As String 
     Dim ms As New MemoryStream(Convert.FromBase64String(as_samlRequest)) 
     Dim decompress As New DeflateStream(ms, CompressionMode.Decompress) 
     Dim xmlMessageBytes As Byte() = New Byte() {} 
     Dim m1 As New MemoryStream(xmlMessageBytes) 
     decompress.CopyTo(m1) 
     Dim document As New XmlDocument() With { _ 
     .PreserveWhitespace = True _ 
     } 
     document.LoadXml(Encoding.UTF8.GetString(xmlMessageBytes)) 
     Return document.DocumentElement.Attributes("ID").InnerXml.ToString() 
End Function

下面是BASE64字符串加密的SAML請求：

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

我有一個例外：「發現無效的數據，同時解碼」在使用上面的代碼。

在使用SAML 2.0 Debugger它應該閱讀測試這種加密的SAML請求：

<samlp:AuthnRequest xmlns:samlp="urn:oasis:names:tc:SAML:2.0:protocol" ID="_bec424fa5103428909a30ff1e31168327f79474984" Version="2.0" IssueInstant="2007-12-10T11:39:34Z" ForceAuthn="false" IsPassive="false" ProtocolBinding="urn:oasis:names:tc:SAML:2.0:bindings:HTTP-POST" AssertionConsumerServiceURL="https://ifim-qa.prudential.com/sps/int-micronsystems/saml20/login"> 
    <saml:Issuer xmlns:saml="urn:oasis:names:tc:SAML:2.0:assertion"> 
     urn:mace:feide.no:services:no.feide.moodle 
    </saml:Issuer> 
    <samlp:NameIDPolicy xmlns:samlp="urn:oasis:names:tc:SAML:2.0:protocol" Format="urn:oasis:names:tc:SAML:2.0:nameid-format:persistent" SPNameQualifier="moodle.bridge.feide.no" AllowCreate="true" /> 
    <samlp:RequestedAuthnContext xmlns:samlp="urn:oasis:names:tc:SAML:2.0:protocol" Comparison="exact"> 
     <saml:AuthnContextClassRef xmlns:saml="urn:oasis:names:tc:SAML:2.0:assertion"> 
      urn:oasis:names:tc:SAML:2.0:ac:classes:PasswordProtectedTransport 
     </saml:AuthnContextClassRef> 
    </samlp:RequestedAuthnContext> 
</samlp:AuthnRequest>

感謝您的幫助提前！

來源

2011-06-06 jeff

那麼你實際上得到？ – AakashM 2011-06-06 09:44:35

我收到了一個異常「解碼時發現無效數據」。在使用該功能。 – jeff 2011-06-06 22:57:07

好吧，我得到它的工作使用下面的代碼：

Protected Function uf_getIDFromSAMLRequest(ByVal as_samlRequest As String) As String 
     Dim xmlMessageBytes As Byte() = Convert.FromBase64String(as_samlRequest) 
     Dim document As New XmlDocument() With { _ 
     .PreserveWhitespace = True _ 
     } 
     document.LoadXml(Encoding.UTF8.GetString(xmlMessageBytes)) 
     Return document.DocumentElement.Attributes("ID").InnerXml.ToString() 
End Function

來源

2011-06-07 01:12:52 jeff

解碼SAML 2.0 64Base字符串

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