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From "Colm O hEigeartaigh (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (WSS-399) WSS4J: cannot set DigestMethod for KEYTRANSPORT_RSAOEP though requested by W3C
Date Mon, 13 Aug 2012 10:00:38 GMT

    [ https://issues.apache.org/jira/browse/WSS-399?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13433033#comment-13433033
] 

Colm O hEigeartaigh commented on WSS-399:
-----------------------------------------


In WSS4J 1.6.8 you will be able to configure a digest algorithm to use with RSA OAEP either
programmatically via WSSecEncrypt or else via the "encryptionDigestAlgorithm" configuration
tag.

Colm.
                
> WSS4J: cannot set DigestMethod for KEYTRANSPORT_RSAOEP though requested by W3C
> ------------------------------------------------------------------------------
>
>                 Key: WSS-399
>                 URL: https://issues.apache.org/jira/browse/WSS-399
>             Project: WSS4J
>          Issue Type: Bug
>          Components: WSS4J Core
>    Affects Versions: 1.6.7
>         Environment: any
>            Reporter: Stefan
>            Assignee: Colm O hEigeartaigh
>             Fix For: 1.6.8
>
>
> As stated on http://www.w3.org/TR/xmlenc-core/#sec-RSA-OAEP (and http://java.net/projects/metro/lists/users/archive/2008-05/message/12)
there should be the possibility to set the message digest that is listed as MANDATORY (and
shall be set in the generated output).
> QUOTE:
> 5.4.2 RSA-OAEP
> Identifier:
>     http://www.w3.org/2001/04/xmlenc#rsa-oaep-mgf1p (REQUIRED)
> The RSAES-OAEP-ENCRYPT algorithm, as specified in RFC 2437 [PKCS1], takes three parameters.
The two user specified parameters are a MANDATORY message digest function and an OPTIONAL
encoding octet string OAEPparams. The message digest function is indicated by the Algorithm
attribute of a child ds:DigestMethod element and the mask generation function, the third parameter,
is always MGF1 with SHA1 (mgf1SHA1Identifier). Both the message digest and mask generation
functions are used in the EME-OAEP-ENCODE operation as part of RSAES-OAEP-ENCRYPT. The encoding
octet string is the base64 decoding of the content of an optional OAEPparams child element
. If no OAEPparams child is provided, a null string is used.

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