SAP Knowledge Base Article - Preview

3270067 - SPNEGO fails after upgrading OS and received error Illegal key size

Symptom

SPNEGO based SSO has been configured for JAVA server, after upgrading OS, SSO failed.
In TSHW trace, following error is observed:

SPNEGORealm: <YOUR AD SERVICE ACCOUNT>
Enabled: true
Description: 
User mapping: SPNEGOUserMapping: mode = XXXXl,XXXX, source = XXX
Default user groups: []
Default user roles: []
SPNEGOKey: code = 17, type = aes128-cts-hmac-sha1-96
SPNEGOKey: code = 3, type = des-cbc-md5
SPNEGOKey: code = 23, type = rc4-hmac
.....
com.sap.security.core.server.jaas.SPNegoLoginModule                     OPTIONAL    ok          exception  true                  Could not validate SPNEGO token. Reason: Illegal key size


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Environment

  • Netweaver Application Server Java
  • Microsoft Active Directory Service

Product

SAP NetWeaver Application Server for Java all versions

Keywords

SPNego, JVM, JAVA system, portal, ntlm, SSO via SPNego, Single Sign-On via SPNego , KBA , BC-JAS-SEC-LGN , Logon, SSO , Problem

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