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    RE: iSCSI: Security (SRP)


    • To: "Ofer Biran" <BIRAN@il.ibm.com>
    • Subject: RE: iSCSI: Security (SRP)
    • From: "Lee Xing" <lxing@Crossroads.com>
    • Date: Wed, 19 Dec 2001 10:29:22 -0600
    • Cc: <ips@ece.cmu.edu>
    • content-class: urn:content-classes:message
    • Content-Transfer-Encoding: 8bit
    • Content-Type: text/plain;charset="iso-8859-1"
    • Disposition-Notification-To: "Lee Xing" <lxing@Crossroads.com>
    • Sender: owner-ips@ece.cmu.edu
    • Thread-Index: AcGIdlq2pAhVDq2OSWW3gcwN941qzQAMsrFw
    • Thread-Topic: iSCSI: Security (SRP)

    Ofer,
    
    Should we specify which encoding method to use?  It seems Base64 is probably better for this.
    
    Thanks.
    
    
    Lee
    
    -----Original Message-----
    From: Ofer Biran [mailto:BIRAN@il.ibm.com]
    Sent: Wednesday, December 19, 2001 4:17 AM
    To: Lee Xing
    Cc: ips@ece.cmu.edu
    Subject: Re: iSCSI: Security (SRP)
    
    
    
    Lee,
    
    Appendix A. iSCSI Security and Integrity
    ...
    02 Authentication
    ...
    Where U, N, g, s, A, B, M and H(A | M | K) are defined in [RFC2945]
    (using the SHA1 hash function, i.e., SRP-SHA1).
    U is a text string, N,g,s,A,B,M and H(A | M | K) are binary items and
    their binary length (not the encoded length) MUST not exceed 1024
    
    And on Section 3.10.4 Text :
    
    Character strings are represented as plain text. Binary items can be
    encoded using their decimal representation (with or without leading
    zeros) or hexadecimal representation (e.g., 8190 is 0x1ffe).  Upper
    and lower case letters may be used interchangeably in hexadecimal
    notation (i.e., 0x1aBc, 0x1AbC, 0X1aBc and 0x1ABC are equivalent).
    Binary items can also be encoded using the more compact Base64
    encoding as specified by [RFC2045] preceded by the 0b.
    
    
    Regards,
       Ofer
    
    Ofer Biran
    Storage and Systems Technology
    IBM Research Lab in Haifa
    biran@il.ibm.com  972-4-8296253
    
    
    "Lee Xing" <lxing@Crossroads.com>@ece.cmu.edu on 14/12/2001 23:03:44
    
    Sent by:  owner-ips@ece.cmu.edu
    
    
    To:   <ips@ece.cmu.edu>
    cc:
    Subject:  iSCSI: Security (SRP)
    
    
    
    Hi,
    
    I got a question on iSCSI security-SRP, and would appreciate it if someone
    could help.
    
    Based on iSCSI v.09, several key=value pairs are used to exchange SRP
    parameters and keys.  Such as:
    
    SRP_N=<N>
    SRP_g=<g>
    SRP_s=<s>
    SRP_A=<A>
    SRP_B=<B>
    SRP_M=<M>
    SRP_HM=<HM>
    
    The question is what types of data formats should be used for each
    key=value pair?  Should decimal, hex, base64 or something else be used?  It
    seems iSCSI v.09 or RTF2945 don't specify it.
    
    Thanks.
    
    
    Lee Xing
    Crossroads Systems, Inc.
    
    
    
    
    
    


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Last updated: Wed Dec 19 12:18:11 2001
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