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Subject: Web Services Security Issues List 17

OASIS Web Services Security Issues List

Version 17, Modified on Wednesday June 11, 2003 08:43:44 -0700


This table include issues from the June 3 meeting minutes http://lists.oasis-open.org/archives/wss/200306/msg00025.html  and on the issues list through June 11.

The previous version of the issues list is at http://www.oasis-open.org/committees/download.php/2383/wss-issues-16.htm.  An archive of the discussion list can be found here: http://lists.oasis-open.org/archives/wss/.

If you identify items that are missing or need correction please contact John Shewchuk or Vijay Gajjala.


WSS ID Type Status Issue Resolution Owner(s)
1 Technical  Closed Can we have alternative mechanisms of signature and encryption other than XML DSIG and XML Encryption? Closed on 10/8/02 - http://lists.oasis-open.org/archives/wss/200210/msg00085.html Conformant implementations must support XML sig/enc and MAY support additional mechanisms. Closed
2 Procedural Closed Clarify the IP status and licensing terms for the submissions to the working group Closed on 9/24/02 - http://lists.oasis-open.org/archives/wss/200210/msg00011.html.  References Prateek Mishra's posting.  http://lists.oasis-open.org/archives/wss/200208/msg00011.html. Closed
3 Technical  Closed Proposal to Label Tokens to Indicate Their Semantics

F2F Topic - Ronald Monzillo and Anthony Nadalin will send out a proposed set of changes.


4 Technical  Closed Why is the token in the header, and not a child of KeyInfo? Chris talked with PHB.  Chris will write up a proposal. http://lists.oasis-open.org/archives/wss/200212/msg00037.html  Closed
5 Technical  Closed Within the KeyInfo, why not use a ds:RetrievalMethod? Chris talked with PHB. Depends on 4 and conversation with PHB.   http://lists.oasis-open.org/archives/wss/200212/msg00037.html Closed
6 Investigation Closed Will the authors of the roadmap submit it? Kelvin to update Road Map URL in WSS TC pages to the permanent URL. http://lists.oasis-open.org/archives/wss/200301/msg00073.html Closed
7 Technical  Closed Does WS-Security assume SOAP 1.1? Per Sept 4 minutes – it will support all versions of SOAP Closed
8 Investigation Closed Determine interest in a Use case document Formed a sub-committee, led by Erik Herring. http://lists.oasis-open.org/archives/wss/200210/msg00127.html Closed
9 Investigation Closed. Approach authors to submit the App Note to the TC http://lists.oasis-open.org/archives/wss/200301/msg00073.html Closed
10 Investigation Closed Investigate interop fest at some later time. http://lists.oasis-open.org/archives/wss/200301/msg00073.html. Closed planned interop event in the middle of June: http://lists.oasis-open.org/archives/wss/200304/msg00049.html Chair
11 Investigation Pending Pick date for OASIS submission date after initial drafts available http://lists.oasis-open.org/archives/wss/200306/msg00025.html

Pending: agenda item for F2F

12 Procedural Closed Remove all references to ws-routing and such References were removed. Closed
13 Technical Closed Element ordering in the Security tag. Editors instructed to clarify.  http://lists.oasis-open.org/archives/wss/200210/msg00085.html Closed
14 Technical Closed State that the recipient SHOULD authenticate the assertion issuer and ensure that the assertion has not been modified http://lists.oasis-open.org/archives/wss/200212/msg00037.html Closed
15 Technical Closed Core: Spec should indicate that it is based on the SOAP messaging model. http://lists.oasis-open.org/archives/wss/200212/msg00037.html Closed
16 Technical Closed Core: The spec should indicate that nonce and / or timestamp elements should be used to prevent replay. http://lists.oasis-open.org/archives/wss/200210/msg00085.html Closed
17 Technical Closed Core: Should SOAP nodes acting in a particular role create or update the appropriate timestamp element. Editors instructed to clarify. http://lists.oasis-open.org/archives/wss/200209/msg00094.html Closed
18 Technical Closed Core: No attribute or reference to the senders time. http://lists.oasis-open.org/archives/wss/200210/msg00085.html Closed
19 Technical Closed Core: Why is it necessary to special case a Username/Password POP token?



20 Technical Closed Core: Define security token propagation. http://lists.oasis-open.org/archives/wss/200212/msg00037.html
21 Technical Closed Core: Update definition of a security token to reflect role in defining key or broaden definition. Was related to 2 and 22.  http://lists.oasis-open.org/archives/wss/200210/msg00127.html
22 Technical Closed Core: Should the spec preclude security tokens whose purpose is other than to convey or bind a key to an identity or entity? Editors to clarify by added "entity" instead of "client".  http://lists.oasis-open.org/archives/wss/200212/msg00037.html 
23 Technical Closed Core: Make Proof-of-Possession a fundamental type or relationship within [sic] within the ws-security model? http://lists.oasis-open.org/archives/wss/200212/msg00037.html Closed
24 Technical Closed Core: Why is it necessary to treat XML Signature elements as other than security tokens? http://lists.oasis-open.org/archives/wss/200212/msg00037.html Closed
25 Technical


Core: How can a Signature element occurring outside of the header be referenced? http://lists.oasis-open.org/archives/wss/200306/msg00025.html

Put scenarios on mailing list. Ron will dig up scenarios. The TC will try to close at the F2F. Ron will put a proposal to close this issue on the e-mail list.

Ronald Monzillo
26 Technical Closed Core: What does it mean to process a BinarySecurityToken?


27 Technical Closed Core: Reference element should have an @any to allow for attribute extensibility http://lists.oasis-open.org/archives/wss/200211/msg00184.html Closed
28 Technical Closed SAML Binding: Include the use of the URI attribute (on SecurityTokenReference) from the SS TC submission


29 Technical Closed SAML Binding: Should there be a reference form that carries what amounts to a SAML assertion Query such that the sender does not need to have acquired the assertion (to be able to apply it to a request)?


30 Technical


How should XML be explained. http://lists.oasis-open.org/archives/wss/200306/msg00025.html

Pending: Chris will send e-mail to editors with explanation of what they are to do.

31 Technical Pending Should use OASIS Namespace http://lists.oasis-open.org/archives/wss/200306/msg00025.html

Pending, waiting for OASIS to provoid solution. For now proceed as is.

Karl Best had formed committee to solve this problem. The target to resolve is in 2 or three months.
32 Technical Closed A couple of parameter values are prescribed (e.g. SHA-1 in the case of the password digest and “five minutes” in the case of message freshness).  The specification should be flexible in these respects. Closed  in Draft 4 of Core specs.  http://lists.oasis-open.org/archives/wss/200211/msg00184.html Closed
33 Technical Closed The specification should prescribe clear behaviour for all parties in regard to freshness safeguards.  And it should require that time values be enclosed in integrity mechanisms. Closed  in Draft 4 of Core specs.  http://lists.oasis-open.org/archives/wss/200211/msg00184.html Closed
34 Technical Closed <wsu:Created> appears to be just a convenient way for the originator to create a nonce.  Therefore, it seems unnecessary to require processing different from that required for the <wsu:Nonce> element. Closed  in Draft 4 of Core specs.  http://lists.oasis-open.org/archives/wss/200211/msg00184.html Closed
35 Technical Closed Is it necessary to support the HexBinary encoding of tokens? Closed  in Draft 4 of Core specs.  http://lists.oasis-open.org/archives/wss/200211/msg00184.html Closed
36 Technical Closed In section 10.2.2, why not just specify that the <Created> element type be xsd:dateTime?


37 Technical Closed lines 193-195: Where does the threat of replay attacks belong to? To the first or the second group? Closed  in Draft 4 of Core specs.  http://lists.oasis-open.org/archives/wss/200211/msg00184.html Closed
38 Technical Closed line 238: Since this is a normative text, how "inappropriate claims" is defined here? Pending owner’s examination of changes in Draft 4.  http://lists.oasis-open.org/archives/wss/200211/msg00184.html Closed
39 Technical Closed Lines 251-255: Since the UrenameToken element does not have password digest, what is the purpose of the Nonce and Created elements here?  http://lists.oasis-open.org/archives/wss/200212/msg00037.html Closed
40 Technical Closed Paragraphs in lines 535-537 and 538-540 repeat each other and one of them needs to be eliminated. Closed. http://lists.oasis-open.org/archives/wss/200211/msg00044.html Closed
41 Technical Closed Line 1016: what specification's section 4.5.3 does it refer to? The above text implies XML Encryption. It should be explicit. Closed. http://lists.oasis-open.org/archives/wss/200211/msg00044.html Closed
42 Technical Closed Line 1155: the meaning of "materially" is unclear. Pending Konstantine’s review of current text. http://lists.oasis-open.org/archives/wss/200211/msg00184.html Closed
43 Technical Closed Lines 1430, 1431: The clause "these elements be included in the signature" is unclear. What does "included in the signature" mean? Should they be signed? Closed. http://lists.oasis-open.org/archives/wss/200211/msg00044.html Closed
44 Technical Closed SAML Cannonicalization http://lists.oasis-open.org/archives/wss/200212/msg00037.html Closed
45 Technical Closed WS_Security Core, Draft 3 uses "Multiple trust domains" on Lines 114 and 141 but never defines this term.  "End-to-end message level security" on line 141 is also not defined.  http://lists.oasis-open.org/archives/wss/200212/msg00037.html Closed
46 Technical


WSDL definitions - It seems to me that a stand-alone specification should just define the semantics of its elements.  If an application wants those semantics, then the application WSDL should specify the header as being required.


Hal: follow up and find out what the real issue is. Hal followed up: http://lists.oasis-open.org/archives/wss/200305/msg00006.html

47 Technical Closed Add example.  Working Draft 3.  Page 21, Section 7.1, lines 644-648, recommends that <wsse:SecurityTokenReference> element should be used as direct children of <ds:KeyInfo> elements to retrieve signing and encryption certificate when using XML Signature and XML Encryption. Although in section 8.4, there is a XML Signature example for using <wsse:SecurityTokenReferences> element within the <ds:signature>'s <ds:KeyInfo> element, there is no examples provided to using SecurityTokenReference element for XML Encryption in section 9. E.g., Section 9.2 does have a <wsse:KeyIdentifier> contained within the <xenc:EncryptedKey> element. However, it does not have the <wsse:securityTokenReference> element encapsulating the <wsse:KeyIdentifier> as specified in section 7.3.



48 Technical Closed Make URI attribute required.  Working Draft 3. Page 22, Section 7.2, lines 662, indicates that SecurityTokenReference/Reference/@URI is an optional attribute. However, the corresponding XML Schema for WS-Security core specification does not explicitly specify the the attribute "URI" of the ReferenceType complex type as an optional attribute by use of "use=optional". I suggest that the URI attribute be required rather than be optional as stated on line 662.



49 Technical Closed Working Draft 3. Page 26, Section 8.4, lines 852-856, indicates a specifialized type of <ds:KeyInfo> element that although is compatible with Section 7.1, I am concerned that the core specification is silent on the subject of acceptability of processing a signature element that uses an in-line X.509 data (representing, e.g., a signing certificate). What processing behaiour is expected from WS-Security compliant system that may receive a SOAP message that contains a signature element in its SOAP security header, i.e., <wsse:security>, that has a <ds:KeyInfo> element that does not contain <wsse:SecurityTokenReference> element rather contains an in-line X509 data pertaining to the signing cert? I think the specification needs to clearl state that all <ds:KeyInfo> instances that contain in-line cert data are also acceptable in addition to <SecurityTokenReference> element option if indeed we are allowing such in-line X509 cert data type of KeyInfo element be part of signature elements. The motivation of using SecurityTokenReference is mostly in the use case where the same signing certificate, for example, may be used to generate multiple signature elements (i.e., when same signing cert is used for signing multiple SOAP message parts) within a <wsse:Security> header. Having specific wordings of minimum requirements of what a SOAP/WS-Security sending and receiving application must support w.r.t. KeyInfo elements will help in security interoperability tests.


50 Technical Closed Sections 7.1 (beginning at line 617 of Draft 3 of the core) through 7.3 define the Security Token Reference Element, Direct References and Key Identifiers. I find the use of these varying forms of references confusing. Perhaps Direct References and Key Identifiers are the 2 forms of STRs, but it looks like there is also a n elemental form of STR that is neither a direct reference or a key identifier.


51 Technical Closed The example beginning at line 637, seems to contain a "direct reference" (in the section on STRs), which makes thedistinction between STR's and direct references difficult (for me) to understand. http://lists.oasis-open.org/archives/wss/200211/msg00057.html Closed
52 Technical Closed The example in section 3.4 (line 278) seems to have been set up to do a reference bywsu:id attribute value, although the reference is done by URI where the value of theURI is the attribute value. Is this the prefered use model? or would we expect a simpleSTR with a wsu:id value as apposed to a Direct reference/URI to be used? The description of key identifiers seems to imply that Direct references are theprefered form of reference, and where they cannot be used a key identifier isrecommended.



53 Technical Closed Section 6.1 Usernames  and Passwords, beginning at line 422, defines the use of the <wsse:UsernameToken> element "as a way of providing a username and optional password information". The definition of this tokenmakes no mention of its potential value in defining the key to supportthe signing or encryption of the attached SOAP message.  I realize that the
core document is intended to serve as a framework, but it seems less thanobvious from the description that these tokens could be used to identifya signing (or encryption key); which perhaps is the most significant usecase that features such tokens.

The example in section 3.4  beginning at line 248,  seems to depict the useof such tokens (as revealed by lines 299-300), as a means to carrya password derived signing key. However, the importance of this example,warrants further discussion in section 6.1.


54 Technical Closed i) Lines 180 to 184: It is not clear to me whether this definition is meant to describe a case of delegation where the client and sender are two different entities or whether the sender is the channel acting on behalf or a client.  From the definition on lines 217 to 223 it appears that delegation is not intended.  Either way I believe this paragraph should be clarified.

ii) Line 294: Should read Lines (005) to (009) .

iii) Line 461: I believe that this line should read - "This required element specifies the username of the authenticated party or the party to be authenticated"  NOT "of the authenticating party."  A clarifying question - am I correct in believing that this specification does not intend to prohibit the receiving party from using the username and password to authenticate the client?

iv) Lines 534 & 535: I believe that these lines should read " ... binary or XML tokens ..", not just "binary tokens"

v) Lines 575 to 588: Are these lines needed since we RECOMMEND that Exclusive Canonicalization be used?

vi) Section 6.3.2:  We say in the WSS-SAML specification to use the assertion id to reference SAML tokens, not to use the wsu:Id and license id for XrML?  This section should state this and shouldn't unequivocally use "SHOULD" for the wsu:id attribute.

vii) Section 7.1 & 7.2: These sections also don't mention assertion id's for SAML and license id's for XrML.

viii) Section 7.4:  This section only discusses BinarySecurityTokens.  SAML also has a KeyInfo token.

i) to be corrected in drafts - pending.

ii) corrected in draft 4 of core specs - pending.

iii) need to correct draft - pending

iv) closed.

v) closed.

vii) closed.

viii) closed.

55 Technical Closed Is it really appropriate to endorse a claim via encryption? Perhaps line 209 in 3.1
should be changed to read: "that is digitally signed by the authority."

Editorial comment - the word "unendorse" can be misinterpreted as some sort of revocation.
I'd argue, remove it from line 208 ("A claim can be endorsed by a trusted authority.") and
then begin line 213 with "A claim may be trusted without explicit endorsement if there is ..."

Editorial - line 362 in 4.2, spell out "Post-Schema Validation InfoSet". I guess this last paragraph says that for non-schema aware processors, support for wsu:Id is optional but recommended? Wouldn't it be better to require support regardless of implementation?


56 Technical Closed General issue with the use of the "utility" namespace for defining elements and attributes used in wsse. It has not been explicitly stated anywhere that I am aware of that the WS-Security TC is responsible for defining this namespace and its associated schema. WS-Security cannot just presume the existence of the utility namespace schema.  ... If there is an expectation that "utility" is to be a truly general Web Services Utility namespace, then it may need to be defined by another TC with input from other Web Services-oriented bodies. But then, again, WSS won't be able to presume its existence at this time.



57 Technical Closed [Section 4.2 and elsewhere] I do not see any value in using "wsu:Id" when the base XML schema ID Type is available. This is especially true since "wsu:Id" is simply defined in utility as just being of type "xsd:ID".  I believe it can only lead to confusion (and minor additional processing overhead). I recommend removing the use of wsu:Id in vavor of the base xsd:ID.

Related to 56.


58 Technical Closed Various editorial comments


59 Technical Closed Various editorial comments on XrML binding

Thomas sent mail closing this.


60 Technical Closed Proposal for processing rules.  It seems that for certain bindings of WSS (SAML and XrML in particular) there may be a more straight-forward way of describing processing rules. Currently, the bindings for these have processing rules described under "proof-of-possession" (in other words, you start with the token and then try to figure out if there is proof of possession, without even knowing if you need to do that for the purposes of that message). Recall that SAML and XrML express, among other things, things like "A can do B upon C." A statement such as "A can do B upon C" doesn't have any inherent processing rules that need to be associated to it necessarily. A better way might be to look at the message. For instance, if the message is encrypted, we only need an identification of the key that can decrypt it, not a statement like "A can do B upon C." If the message is signed using a key (say k), we need to validate the signature (say it succeeds), check the semantics of the message (say that it is that Alice is requesting two tickets (to see a movie)), check that the request is fresh (say that it is), check that Alice is authenticated to k (say that she is), check that "Alice can request upon tickets" (say that she can), and, finally, process the request and generate the response. (Also, as Phill pointed out in his recent e-mail, we ought to also indicate where the callers should put -- and the receivers expect to find -- the tokens for each of these steps in order to avoid the cost of figuring out the chains on the server side.) In this way, it is clear what the intent and processing rules of the token are, once we establish that there is first some processing to determine what it is we are trying to prove with the tokens based on the message coming in. I think this is clearer rather than just looking at the tokens and explaining some of the things we can prove with them.


61 Technical Closed

Proposed change in wording to address lines [813]-[820] in merged draft 8, 12 Dec 2002. 

"An XML signature may also be used to prove that the claims in a token apply to the signer. Proving possession of a key associated with a token key claim supports applying the other token claims with the signer. The relying party acceptance of the claims may depend on confidence in the token integrity, such as validation of an authority signature on the token. Multiple tokens may have a key claim for a signature and may be referenced from the signature using a SecurityTokenReference. A key claim can be an X.509 Certificate token, or a Kerberos service ticket token to give two examples."

Frederick: Wording on doc is fine: http://lists.oasis-open.org/archives/wss/200302/msg00066.html


62 Technical Open Versioning Mechanisms.


The TC has to decide whether to address the versioning issue.  If it is decided to address this issue, then put a concrete proposal on the mailing list. 

Anyone interested in looking at what other groups have invented contact John or Hal - Hal, Phil, John to participate so far. This group to report back with a proposal.

Jerry will make a propsal.  http://lists.oasis-open.org/archives/wss/200306/msg00036.html

63 Technical Closed XML Token Wrapper


64 Procedural Closed Add glossary http://lists.oasis-open.org/archives/wss/200301/msg00073.html. Terminology section is like a glossary. No additional action required. http://lists.oasis-open.org/archives/wss/200304/msg00049.html Editors
65 Technical Closed Adding support for biometric authentication to the UserName security token. http://lists.oasis-open.org/archives/wss/200301/msg00073.html. Closed, pending changes from Phil. http://lists.oasis-open.org/archives/wss/200304/msg00048.html TC

Phil Griffin

66 Technical Closed Open transform http://lists.oasis-open.org/archives/wss/200302/msg00017.html

Add subsection to section 7 to define the case where the a security token can be a subelement of a STR. Related note: http://lists.oasis-open.org/archives/wss/200303/msg00002.html

67 Technical Open Resolve usage labels. http://lists.oasis-open.org/archives/wss/200306/msg00025.html

This will be an action item for F2F. Hal will prepare an overview for F2F.

68 Technical Closed Review username password hash encryption issues http://lists.oasis-open.org/archives/wss/200302/msg00017.html
Chris: no uniform way to express which shared secret to use, but could define QName values for this.
69 Technical Pending The specification is vague on the topic of Key Identifiers. http://lists.oasis-open.org/archives/wss/200306/msg00025.html

Chris to send mail to editors.

70 Technical Open The specification needs to clarify usage of S:mustUnderstand. There were several opinions on what understanding would include: understanding and processing <wsse:Security> header element and all its sub elements when the header element is tagged with mustUnderstand="1", understanding but not processing, tagging all child elements with explicit S:mustUnderstand values of "0" or "1"... http://lists.oasis-open.org/archives/wss/200306/msg00025.html

F2F agenda item

71 Technical Open Inconsistent token pre-pending rules http://lists.oasis-open.org/archives/wss/200306/msg00025.html

Continue to discuss on list.  If no decision, discuss at F2F.

72 Technical Open Awkward status of message timestamps in WSS core http://lists.oasis-open.org/archives/wss/200306/msg00025.html

Continue to discuss on list.  If no decision, discuss at F2F.

73 Technical Open What tokens are allowed within TokenReference? Add an embedded reference, but this isn't well defined. http://lists.oasis-open.org/archives/wss/200306/msg00025.html

Editors have not yet made a proposal.  Chris will contact the editors to pull this together.

74 Technical Open Encrypting a password. Points of discussion:
1. Should we encrypt password, username or the entire UsernameToken element? 2. Should we add an XCBF parameter to Username token? Should this be used in interop? 3. If interop model is viewed as guidance from the TC on secure usages, shouldn't it be secure completely? 4. How do we balance against existing deployments, which require passwords in the clear?

The Interop issues, which are part of this issue, have been closed.  Open: text for Security Considerations needs to be done.  Hal has sent proposed text.  Please review.

75 Technical Resolved Denial of service attacks and error reporting.


Use standard SOAP language. Must generate a fault, however, generating a fault does not mean sending a fault.  Review editorial changes.

76 Technical Pending X.509 profile issue 1: Is it desirable to use same element as reference and referrent? http://lists.oasis-open.org/archives/wss/200306/msg00025.html

To wait for Tim to join the discussion.

Tim Moses
77 Technical Pending X.509 profile issue 2: In Section 3.4, the proposal should be more fully described. Why would one not just put the wsu:id in the ds:keyName element of the ds:keyInfo http://lists.oasis-open.org/archives/wss/200306/msg00025.html

To wait for Tim to join the discussion.

Tim Moses
78 Technical Pending X.509 profile issue 3: Under what circumstances would one need to reference an X.509 certificate containing an encryption key? http://lists.oasis-open.org/archives/wss/200305/msg00026.html

Tim Moses will have a chance review in June.

Tim Moses
79 Technical Pending X.509 profile issue 4: It might be necessary to carry more than one certificate. It should be explained which element needs to be duplicated in order to convey multiple certificates. http://lists.oasis-open.org/archives/wss/200305/msg00026.html

Tim Moses will have a chance review in June.

Tim Moses
80 Technical Open X.509 profile issue 5: Suggest MUST use common error codes http://lists.oasis-open.org/archives/wss/200303/msg00036.html

Phil: incorporated into latest draft. Waiting for confirmation from Tim Moses?

Tim Moses
81 Technical Closed Question on STR usage attribute: Does the definition of the usage attribute of STR allow for the
association of multiple usage annotations with an STR?

Will fix in schema. Fixed in schema?

82 Procedural Open Scrub specs and update links to other specifications Kelvin Lawrence:
83 Technical Close <xenc:EncryptedData> element should precede the <xenc:EncryptedKey/> element in the
interop scenario.

Closed as there were no comments.

84 Technical Open Comment on Core Spec and Interop Scenario #3 - Decryption Transform. Ordering semantics of the <wsse:Security> header can not be used in all cases to determine the encryption and signature ordering. Perhaps we should require use of the Decryption Transform on all
signatures or at least in every case when both encryption and signatures are being used.
Hal has written an email:


Needs to be reviewed. Hal proposed text for issue: http://lists.oasis-open.org/archives/wss/200306/msg00003.html

85 Procedural Closed. Post a draft of F2F questions. Paul Cotton has posted draft. http://lists.oasis-open.org/archives/wss/200304/msg00009.html  TC
86 Technical Open Non-repudiation proposal to be included as part of WS-Security http://lists.oasis-open.org/archives/wss/200304/msg00016.html TC
87 Technical Open Add a profile for XKMS to WS-Security. Currently no owner for this. TC
88 Procedural Open Wrap up and release dates for version 1.0 http://lists.oasis-open.org/archives/wss/200305/msg00000.html Kelvin to meet with Chris and draft a proposal. Others can indicate critical dates. TC
89 Technical Open Proposal for making BinaryToken and XML Token to be abstract types.  http://lists.oasis-open.org/archives/wss/200305/msg00046.html TC
90 Technical Open Clarification needed on wsse:Embedded. Is the motivation for wsse:Embedded to have the token literally embedded in an STR? If so, the examples with wsu:Id seem incorrect. http://lists.oasis-open.org/archives/wss/200305/msg00028.html TC
91 Technical Open Interop spec mustUnderstand uses "true" where as SOAP mustUnderstand attribute is either "1" or "0". The interop schema doesn't validate against SOAP schema. http://lists.oasis-open.org/archives/wss/200305/msg00025.html . Fixed in draft 3. Propose we close. TC
92 Technical Closed Should we support "multiple recipient" case for encryption? A possible use of multiple EncryptedKey elements in different security headers is to enable multiple roles, possessing distinct private asymmetric keys, to get access to the same data, encrypted with the same symmetric key. In this scenario, the intermediary, should perform the decryptions indicated in the Security header labeled with its role, passing the result to its local application. The problem is there is no way to distinguish this case versus Super encryption case where multiple encryption headers might also exist. http://lists.oasis-open.org/archives/wss/200305/msg00022.htmlnot a separate issue, part of the order of decryption issue. No one commented, so if you want support multiple recipient case for encryption, you're on your own
93 Technical Closed Error in WSS interop example #2. http://lists.oasis-open.org/archives/wss/200305/msg00005.html

Fixed in latest draft. Closed.

94 Technical Open Embedded missing from STR preferred. Embedded References were not added to the list in lines 642-648 http://lists.oasis-open.org/archives/wss/200306/msg00012.html TC
95 Technical Open The xmlenc schema does not specify anyAttribute; I think this means that the permitted attributes of EncryptedData are fixed, and the original unqualified Id attribute would then be correct.
http://lists.oasis-open.org/archives/wss/200306/msg00027.html Merlin Hughes
96 Technical Open Various edits.

Some small issues/edits from reading half of the doc.

i) Line 186:

The xsd: prefix is also used in the document.

ii) Line 490 and globally:

"A string label" is, to me, a slightly vague definition for ID attributes; would "An ID label" or some such be better?

iii) Line 544:

... The ValueType attribute s/allows/is/ a qualified name ...

iv) Line 547 and elsewhere:

If EncodingType is unspecified, I presume that means base 64; should we say this explicitly? We say 'default'
in some places, but the meaning of that is not altogether clear to me; I could misinterpret as schema default.

v) Lines 562-566:

Why is it RECOMMENDED that the namespace prefixes be declared within the wsse:BinarySecurityToken element? They have to be declared somewhere, in order for the QName to have meaning; so I'm not sure what this recommendation is adding. If anything, shouldn't we be requiring that exclusive c14n, if used, include any non-visibly-utilized namespace prefixes in its unsuppressed prefix list?

vi) Line 600:

... If a s/SecurityTokenRefeference/SecurityTokenReference is/ used outside ...

vii) Line 601:

... reference s/are// MUST be ...

viii) Line 615:

Does wsse:Usage deserve to be a global attribute? It only appears to be used once.

ix) Lines 703, 708 and elsewhere:

703: The ValueType attribute is used to optionally indicate
708: The optional EncodingType attribute is used to indicate

If we don't intend a different meaning, I'd suggest standardizing on the form of line 708.

x) Line 726:

... is used to s/embedded/embed/ a token ...

xi) Lines 730,733:


xii) Line 765:

... Additionally, s/defined for// e-mail addresses ...

xiii) Lines 768-777:

Is the font off?

http://lists.oasis-open.org/archives/wss/200306/msg00040.html Merlin Hughes
97 Technical Open i) Whitespace

The examples appear to have spaces around usernames, passwords, created. We should state whether or not whitespace is significant, and possibly update the examples. Is the encoded form of the Created element ' 2001...Z ' or '2001...Z'?

ii) Ordering

The schema doesn't specify an element order. Does our UsernameToken profile mandate the order Username,Password,Nonce?,Created? or is any order valid, or should we make the schema more strict?
http://lists.oasis-open.org/archives/wss/200306/msg00041.html Merlin Hughes
98 Technical Open Because Interop Scenario #3 uses two key pairs instead of four key pairs, it avoids a security threat in a way that was not apparent to me until a recent internal review. The basic issue is: when the responder encrypts the response, how does it determine that the public key it uses is that of the proper party and not some attacker.

Suppose each party has two key pairs, one for signatures and one for encryption. Let us assume the requester provides a certificate containing the public key to be used for encrypting the response. Checking to see if the certificate is valid is insufficient (and probably unnecessary). That would not prevent an attacker from substituting his or her own (perfectly
valid) certificate.

Interop scenario #3 does not have this problem, because the same key is used to sign the request, thus demonstrating that the requester knows the corresponding private key.

There is more than one way to solve this problem. One possible way would be to require that the SubjectName in the encryption certificate is the same as the one in the signature certificate. I do not think this is a good approach. For one thing there are a least a dozen reasons that even if both certs were issued to the same system entity (person), the SubjectNames won't match. Second it doesn't support the case where the requester and recipient are distinct.

A better solution would be to require that the encryption certificate (or at least the public key) fall under the signature of the request. This proves that the key came from the requester, which is what we are really trying to determine. This might be a good time to use /Usage={receiver}.
http://lists.oasis-open.org/archives/wss/200306/msg00044.html Hal Lockhart


Notes on Issues

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