IBM Support

IT28464: IBM STERLING B2B INTEGRATOR V5.2.6.3 DOES NOT SUPPORT DIFFIE-HELLMAN-GROUP-EXCHANGE-SHA256 AND NEW PROTOCOL HANDSHAKE

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APAR status

  • Closed as program error.

Error description

  • While connecting to new versions of SFTP Servers, IBM
    Sterling b2B Integrator is unable to connect using
    diffie-hellman-group-exchange-sha256.
    
    
    The following error message is displayed :
    
    [2019-03-11 05:02:03.2] ERROR 000000000000 GLOBAL_SCOPE
    Session.beginSession(BSR,R,PT) runnable caught exception
    java.io.IOException
       at
    com.sterlingcommerce.woodstock.ssh.maverick.PsSshTransport.creat
    ePsSshTransport(PsSshTransport.java:123)
       at
    com.sterlingcommerce.woodstock.ssh.maverick.PsSshTransport.<init
    >(PsSshTransport.java:82)
       at
    com.sterlingcommerce.woodstock.services.sftpclient.client.Sessio
    n$1.run(Session.java:244)
       at
    EDU.oswego.cs.dl.util.concurrent.PooledExecutor$Worker.run(Unkno
    wn Source)
       at java.lang.Thread.run(Thread.java:798)
    [2019-03-11 05:02:03.2] ERROR Session.failedSequence(S,R)
    Connection Failure! Could not complete connection to specified
    host :
    [2019-03-11 05:03:05.092] ERROR Session.failedSequence(S,R) No
    such file.: No such file. :
    [2019-03-11 05:18:05.228] ERROR Session.beginSession(BSR,R,PT)
    runnable caught exception. SSH_DISCONNECT_BY_APPLICATION:SFTP
    session channel closed by server.
    [2019-03-11 05:18:05.228] ERROR [1552277885228]
    com.maverick.ssh.SshException
    [2019-03-11 05:18:05.228] ERRORDTL
    [1552277885228]com.maverick.ssh.SshException:
    com.maverick.ssh.SshException
       at
    com.maverick.ssh.components.jce.DiffieHellmanGroupExchangeSha1.p
    erformClientExchange(Unknown Source)
       at com.maverick.ssh2.TransportProtocol.e(Unknown Source)
       at
    com.maverick.ssh2.TransportProtocol.processMessage(Unknown
    Source)
       at
    com.maverick.ssh2.TransportProtocol.startTransportProtocol(Unkno
    wn Source)
       at com.maverick.ssh2.Ssh2Client.connect(Unknown Source)
       at com.maverick.ssh.SshConnector.connect(Unknown Source)
       at com.maverick.ssh.SshConnector.connect(Unknown Source)
       at
    com.sterlingcommerce.woodstock.services.sftpclient.client.Sessio
    n$1.run(Session.java:269)
       at
    EDU.oswego.cs.dl.util.concurrent.PooledExecutor$Worker.run(Unkno
    wn Source)
       at java.lang.Thread.run(Thread.java:798)
    Caused by: com.maverick.ssh.SshException: Key exchange failed:
    Expected SSH_MSG_KEX_GEX_GROUP [id=3] [Unknown cause]
       ... 10 more
    

Local fix

  • STRRTC - 581126
    GB / GB
    Circumvention: None
    

Problem summary

  • USERS AFFECTED:
    ALL
    
    PROBLEM DESCRIPTION:
    SFTP Client Begin Session Service fails using
    diffie-hellman-group-exchange-sha256 in IBM Sterling
    B2B Integrator V5.2.6.3_9.
    
    PLATFORMS AFFECTED:
    ALL
    

Problem conclusion

  • RESOLUTION SUMMARY:
    
    A code fix is provided.
    
    DELIVERED IN:
    5020603_10
    

Temporary fix

Comments

APAR Information

  • APAR number

    IT28464

  • Reported component name

    STR B2B INTEGRA

  • Reported component ID

    5725D0600

  • Reported release

    526

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2019-03-15

  • Closed date

    2019-05-13

  • Last modified date

    2019-05-17

  • APAR is sysrouted FROM one or more of the following:

  • APAR is sysrouted TO one or more of the following:

Fix information

  • Fixed component name

    STR B2B INTEGRA

  • Fixed component ID

    5725D0600

Applicable component levels

[{"Business Unit":{"code":"BU059","label":"IBM Software w\/o TPS"},"Product":{"code":"SS3JSW","label":"IBM Sterling B2B Integrator"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"5.2.6","Edition":"","Line of Business":{"code":"LOB02","label":"AI Applications"}}]

Document Information

Modified date:
17 May 2019