Re: [stir] RFC 8224
Roman Shpount <roman@telurix.com> Tue, 20 April 2021 15:11 UTC
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From: Roman Shpount <roman@telurix.com>
Date: Tue, 20 Apr 2021 11:10:45 -0400
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To: "Peterson, Jon" <jon.peterson=40team.neustar@dmarc.ietf.org>
Cc: Chris Wendt <chris-ietf@chriswendt.net>, "Zerr, Brad" <BZerr@tnsi.com>, Eric Rescorla <ekr@rtfm.com>, Marc Petit-Huguenin <marc@petit-huguenin.org>, Christer Holmberg <christer.holmberg@ericsson.com>, IETF STIR Mail List <stir@ietf.org>, Cullen Jennings <fluffy@iii.ca>, "Toy, Arthur" <atoy@tnsi.com>
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Subject: Re: [stir] RFC 8224
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I have a border question: What if the destination is phone number + extension as in sip:+11231231212%231212@provider.com? The portion after the # has no meaning for transit providers but can be interpreted by the destination PBX. Best regards. _____________ Roman Shpount On Tue, Apr 20, 2021 at 10:50 AM Peterson, Jon <jon.peterson= 40team.neustar@dmarc.ietf.org> wrote: > > > I certainly think it was the intention of the canonicalization procedures > to resolve dial strings into globally routable numbers. While there are > always going to be some exceptions to this (service codes is an example, or > certain non-geographic freephone numbers, say), I think Chris is hitting on > the right point here. We sign calls so that a relying party on the > terminating side can validate them. If what the relying party receives is a > dial string that has no meaning in their network, what are we accomplishing? > > > > Jon Peterson > > Neustar, Inc. > > > > *From: *Chris Wendt <chris-ietf@chriswendt.net> > *Date: *Tuesday, April 20, 2021 at 7:22 AM > *To: *"Zerr, Brad" <BZerr@tnsi.com> > *Cc: *Christer Holmberg <christer.holmberg@ericsson.com>, Marc > Petit-Huguenin <marc@petit-huguenin.org>, Cullen Jennings <fluffy@iii.ca>, > IETF STIR Mail List <stir@ietf.org>, Eric Rescorla <ekr@rtfm.com>, > "Peterson, Jon" <jon.peterson@team.neustar>, "Toy, Arthur" <atoy@tnsi.com> > *Subject: *Re: [stir] RFC 8224 > > > > Hi Brad, > > > > I think maybe you are addressing the local mechanics since you are likely > focused on getting implementation correct, but i’m asking more high level > about why we are signing dialing codes as a dest, when this is application > specific and there is no chance this will mean anything to a terminating > provider or customer across NNI interface. In fact, seems like a real > potential security threat, which is why i’d like to get some feedback on > whether i’m not seeing why this would be potentially useful in the case of > STIR generically let alone STIR/SHAKEN specifically. > > > > -Chris > > > > On Apr 19, 2021, at 4:33 PM, Zerr, Brad <BZerr@tnsi.com> wrote: > > > > Good afternoon, Chris. > > > > I am a visual person, so thought it would be nice to lead off with the > call flow scenario to put this into context. This is a pretty typical call > flow scenario for ADC (abbreviated dialing codes / short codes). I fit > into the green box below. As you can see, there is a lot of escaping and > putting # back into the correct fields. > > > > <image001.png> > > > > *From:* Chris Wendt <chris-ietf@chriswendt.net> > *Sent:* Monday, April 19, 2021 2:48 PM > *To:* Christer Holmberg <christer.holmberg@ericsson.com> > *Cc:* Zerr, Brad <BZerr@tnsi.com>; Marc Petit-Huguenin < > marc@petit-huguenin.org>; Cullen Jennings <fluffy@iii.ca>; IETF STIR Mail > List <stir@ietf.org>; Eric Rescorla <ekr@rtfm.com>; Jon Peterson < > jon.peterson@neustar.biz>; Toy, Arthur <atoy@tnsi.com> > *Subject:* Re: [stir] RFC 8224 > > > > Hi Brad, All, > > > > 1000082 is a technical report and not a normative document, however > doesn’t mean that fixes can’t or shouldn’t happen, but you or the folks > that participate should bring this back to IPNNI group. > > > > But maybe to take it up a level, I’m still struggling why you are sending > this dial string, signed back to a peering point. I’m just wondering do we > have something broken here and is this an IETF stir issue or IPNNI issue. > > > > Since this is IETF list, can anyone justify why we want to sign sip:*99 as > dest for any general SIP scenario? > > > > I really think part of STIR/SHAKEN initiative should be thinking about > what telephone identity is being used in To/From/PAID, and it think this is > something that needs cleaning up, especially across NNI, but i would argue > even intra network too, but I realize that is harder argument. > > > > So, not sure i’m missing something, but i’m a little puzzled why others > are not questioning this as well, thus i’m asking the question. > > > > -Chris > > > > > On Apr 8, 2021, at 4:25 PM, Christer Holmberg < > christer.holmberg@ericsson.com> wrote: > > > > Hi, > > > > I am not making ATIS contributions, but I am sure there is someone else > who can help you with that :) > > > > I still think the processing of the phone-context parameter is a question > mark, though. Maybe we need to add some text somewhere (unless I’ve missed > it). > > > > Regards, > > > > Christer > > > > *From:* Zerr, Brad <BZerr@tnsi.com> > *Sent:* torstai 8. huhtikuuta 2021 22.56 > *To:* Christer Holmberg <christer.holmberg@ericsson.com>; Marc > Petit-Huguenin <marc@petit-huguenin.org>; Chris Wendt < > chris-ietf@chriswendt.net> > *Cc:* Cullen Jennings <fluffy@iii.ca>; IETF STIR Mail List <stir@ietf.org>; > Eric Rescorla <ekr@rtfm.com>; Jon Peterson <jon.peterson@neustar.biz>; > Toy, Arthur <atoy@tnsi.com> > *Subject:* RE: [stir] RFC 8224 > > > > Fyi. Something like this in the document (ATIS-1000074 or 1000082) may go > a long way: > > > > <image001.png> > > > > *From:* Christer Holmberg <christer.holmberg@ericsson.com> > *Sent:* Thursday, April 8, 2021 2:34 PM > *To:* Zerr, Brad <BZerr@tnsi.com>; Marc Petit-Huguenin < > marc@petit-huguenin.org>; Chris Wendt <chris-ietf@chriswendt.net> > *Cc:* Cullen Jennings <fluffy@iii.ca>; IETF STIR Mail List <stir@ietf.org>; > Eric Rescorla <ekr@rtfm.com>; Jon Peterson <jon.peterson@neustar.biz>; > Toy, Arthur <atoy@tnsi.com> > *Subject:* RE: [stir] RFC 8224 > > > > Hi Brad, > > > > You take the telephone number from the To header, and place it into the > “dest”/”tn” claim of the PASSport. > > > > But, unfortunately # has to be escaped in the To header, and un-escaped in > the “dest”/”tn” claim, so you need to do a escaped-to-un-escaped conversion > when placing the phone number in the PASSport. > > > > Regards, > > > > Christer > > > > > > > > *From:* Zerr, Brad <BZerr@tnsi.com> > *Sent:* torstai 8. huhtikuuta 2021 22.27 > *To:* Christer Holmberg <christer.holmberg@ericsson.com>; Marc > Petit-Huguenin <marc@petit-huguenin.org>; Chris Wendt < > chris-ietf@chriswendt.net> > *Cc:* Cullen Jennings <fluffy@iii.ca>; IETF STIR Mail List <stir@ietf.org>; > Eric Rescorla <ekr@rtfm.com>; Jon Peterson <jon.peterson@neustar.biz>; > Toy, Arthur <atoy@tnsi.com> > *Subject:* RE: [stir] RFC 8224 > > > > Hi Christer, > > > > Can you describe how you determine that. According to ATIS-1000074-E, the > destination claim “tn” states to use the To header. > > > > <image002.png> > > > > *From:* Christer Holmberg <christer.holmberg@ericsson.com> > *Sent:* Thursday, April 8, 2021 2:21 PM > *To:* Zerr, Brad <BZerr@tnsi.com>; Marc Petit-Huguenin < > marc@petit-huguenin.org>; Chris Wendt <chris-ietf@chriswendt.net> > *Cc:* Cullen Jennings <fluffy@iii.ca>; IETF STIR Mail List <stir@ietf.org>; > Eric Rescorla <ekr@rtfm.com>; Jon Peterson <jon.peterson@neustar.biz>; > Toy, Arthur <atoy@tnsi.com> > *Subject:* Re: [stir] RFC 8224 > > > > Hi Brad, > > > > The ATIS text you reference is not for the To header. > > > > Regards, > > > > Christer > > > > Get Outlook for iOS > <https://urldefense.com/v3/__https://aka.ms/o0ukef__;!!N14HnBHF!q9wWho1cNUwvzcZ8DPi8PsgND6ZUxdV4-VKsWX8A7KKpPQawDODm4_Mp3zA$> > ------------------------------ > > *From:* Zerr, Brad <BZerr@tnsi.com> > *Sent:* Thursday, April 8, 2021 10:16:44 PM > *To:* Christer Holmberg <christer.holmberg@ericsson.com>; Marc > Petit-Huguenin <marc@petit-huguenin.org>; Chris Wendt < > chris-ietf@chriswendt.net> > *Cc:* Cullen Jennings <fluffy@iii.ca>; IETF STIR Mail List <stir@ietf.org>; > Eric Rescorla <ekr@rtfm.com>; Jon Peterson <jon.peterson@neustar.biz>; > Toy, Arthur <atoy@tnsi.com> > *Subject:* RE: [stir] RFC 8224 > > > > Hi all, > > > > From previous conversations, it was recommended that the # character in > the TO header needed to be escaped with %23 > > > > To: sip:%2355;phone-context=ims.mnc420.mcc312.3gppnetwork.org@ims.mnc420. > mcc312.3gppnetwork.org > <https://urldefense.com/v3/__http://mcc312.3gppnetwork.org/__;!!N14HnBHF!q9wWho1cNUwvzcZ8DPi8PsgND6ZUxdV4-VKsWX8A7KKpPQawDODmFbxZBbE$> > ;user=phone > > > > This seems to be at odds with ATIS 1000082 stating what the allowed > characters are. As you can see below from 1000082, the % is not as part of > this list. > > > > Recommendations? > > > > <image003.png> > > > > *From:* Christer Holmberg <christer.holmberg@ericsson.com> > *Sent:* Wednesday, April 7, 2021 4:00 PM > *To:* Marc Petit-Huguenin <marc@petit-huguenin.org>; Zerr, Brad < > BZerr@tnsi.com>; Chris Wendt <chris-ietf@chriswendt.net> > *Cc:* Cullen Jennings <fluffy@iii.ca>; IETF STIR Mail List <stir@ietf.org>; > Eric Rescorla <ekr@rtfm.com>; Jon Peterson <jon.peterson@neustar.biz>; > Toy, Arthur <atoy@tnsi.com> > *Subject:* RE: [stir] RFC 8224 > > > > Hi, > > >>>>> 1. Section 8.1: > >>>>> > >>>>> The origin is either in the From header or in the > P-Asserted-Identity header, in the example below we have both, but which > one to use is a matter of local policy, so we are going to process all 3 > (one in the From, two in the PAI): > >>>>> > >>>>> orig1: > >>>>> sip:+1xxxxxxxxxx@ims.mncxxxx.mccxxx.3gppnetwork.org;tag=p65539t1617 > >>>>> 20 > >>>>> 6731m169121c110882s1_1220390100-1617434405 > >>>>> orig2: sip:xxxxxxxxx@ims.mnc420.mcc312.3gppnetwork.org > >>>>> orig3: tel:xxxxxxxxx <xxxxxxxxx> > >>>>> > >>>>> The destination is always in the To header: > >>>>> > >>>>> dest: > >>>>> sip:*99;phone-context=ims.mncxxx.mccxxx.3gppnetwork.org@ims.mncxxx. > >>>>> mc > >>>>> cxxx.3gppnetwork.org > <https://urldefense.com/v3/__http://cxxx.3gppnetwork.org/__;!!N14HnBHF!q9wWho1cNUwvzcZ8DPi8PsgND6ZUxdV4-VKsWX8A7KKpPQawDODmPaMNhOA$> > ;user=phone > >>>>> > >>>>> 2. Section 8.1 > >>>>> > >>>>> Per this section, SIP URIs containing a user=phone parameter or tel > URI contain a phone numbers. Everything else does not contain a phone > number. > >>>>> > >>>>> Here only orig3 and dest contains a phone number, and need to be > canonicalized using section 8.3. The part subject to canonicalization is > the user part of the URI: > >>>>> > >>>>> orig3: xxxxxxxxx > >>>>> dest: *99;phone-context=ims.mncxxx.mccxxx.3gppnetwork.org > <https://urldefense.com/v3/__https://protect2.fireeye.com/v1/url?k=7c40792e-23db4012-7c4039b5-86b1886cfa64-568f8cb842251179&q=1&e=0857f501-f35f-4a5a-b9cc-18fdb5033d11&u=http*3A*2F*2Fims.mncxxx.mccxxx.3gppnetwork.org*2F__;JSUlJQ!!N14HnBHF!q9wWho1cNUwvzcZ8DPi8PsgND6ZUxdV4-VKsWX8A7KKpPQawDODm9qz1or8$> > >>>>> > >>>>> orig1 and orig2 are canonicalized using section 8.5. The input is > the whole URI: > >>>>> > >>>>> orig1: sip:+1xxxxxxxxxx@ims.mncxxxx.mccxxx.3gppnetwork.org > >>>>> orig2: ip:xxxxxxxxx@ims.mnc420.mcc312.3gppnetwork.org > >>>> > >>>> Where in Section 8 is it defined that phone-context is removed? > >>> > >>> It is removed by not being part of the username (or user part) portion > of a SIP URI: > >> > >> It is part of the user part. > >> > >> When user=phone is present, the user part is encoded as a > telephone-subscriber (RFC 2806), which may contain a phone-context. > > > > Right, I was thinking of user=phone. > > > > phone-context and the other parameters are removed when applying the > first bullet point in 8.3. > > well, the bullet only talks about specific characters, which means numeric > characters of the phone-context would remain... > > I think there should be explicit text about tel-URL parameters (in > addition to phone-context there are also others). > > Regards, > > Christer > > > > > > > Regards, > > > > Christer > > > > > > > > > > > > > > > > > > 8.1: > > > > "First, implementations will ascertain if the user portion of the URI > > constitutes a telephone number. Telephone numbers most commonly > > appear in SIP header field values in the username portion of a SIP > > URI" > > > > 8.3: > > > > "Once an implementation has identified a telephone number, it must > > construct a number string." > > > > "o Implementations MUST drop any "+"s, internal dashes, parentheses, > > or other non-numeric characters, except for the "#" or "*" keys > > used in some special service numbers" > > > > > >> > >> > >> > >> On 4/7/21 9:54 AM, Christer Holmberg wrote: > >>> Hi, > >>> > >>>>> Maybe the problem with the To header is the phone-context parameter. > >>>>> The RFC 8224 procedures do not cover the presence of the parameter: > the parameter is not removed, nor is it added to the tn. And, the generic > SIP canonicalization procedures does not remove the parameter either. > >>>> > >>>> That is not my understanding of RFC 8224 section 8.1 and 8.3. > >>> > >>> What is your understanding? > >>> > >>> Regards, > >>> > >>> Christer > >>> > >>> > >>> > >>>> From: Zerr, Brad <BZerr@tnsi.com> > >>>> Sent: keskiviikko 7. huhtikuuta 2021 18.26 > >>>> To: Chris Wendt <chris-ietf@chriswendt.net>; Christer Holmberg > >>>> <christer.holmberg@ericsson.com> > >>>> Cc: Marc Petit-Huguenin <marc@petit-huguenin.org>; Cullen Jennings > >>>> <fluffy@iii.ca>; IETF STIR Mail List <stir@ietf.org>; Eric Rescorla > >>>> <ekr@rtfm.com>; Jon Peterson <jon.peterson@neustar.biz>; Toy, > >>>> Arthur <atoy@tnsi.com> > >>>> Subject: RE: [stir] RFC 8224 > >>>> > >>>> Hi Chris, > >>>> > >>>> Here is a little background that got this conversation going. > >>>> > >>>> One of our customers sent us a SIP INVITE so we could perform the > Stir-Shaken Signing for them. The customer performed the translations on > their MMTEL TAS to translate *55 to a 10 digit number. When we receive the > SIP INVITE for signing, it had the REQ-URI with the 10 digit number and the > TO header with *55, see below. Our applications rejected this because of > the TO header (whether it is right or wrong is to be determined). So we > start questioning how * and # short codes should be handled. > >>>> > >>>> FYI, I “x” out information to keep anonymous > >>>> > >>>> INVITE > >>>> sip:+xxxxxxxxxx;phone-context=imsmncXXXmccXXXXgppnetworkorg@ims.mnc > >>>> x x x.mcc3xxx.3gppnetwork.org > <https://urldefense.com/v3/__http://x.mcc3xxx.3gppnetwork.org/__;!!N14HnBHF!q9wWho1cNUwvzcZ8DPi8PsgND6ZUxdV4-VKsWX8A7KKpPQawDODm2TTnri4$>;user=phone > SIP/2.0 > >>>> To: > >>>> sip:*99;phone-context=ims.mncxxx.mccxxx.3gppnetwork.org@ims.mncxxx. > >>>> m > >>>> c > >>>> cxxx.3gppnetwork.org > <https://urldefense.com/v3/__http://cxxx.3gppnetwork.org/__;!!N14HnBHF!q9wWho1cNUwvzcZ8DPi8PsgND6ZUxdV4-VKsWX8A7KKpPQawDODmPaMNhOA$> > ;user=phone > >>>> From: > >>>> sip:+1xxxxxxxxxx@ims.mncxxxx.mccxxx.3gppnetwork.org;tag=p65539t1617 > >>>> 2 > >>>> 0 > >>>> 6731m169121c110882s1_1220390100-1617434405 > >>>> Call-ID: p65539t1617206731m169121c110882s2 > >>>> CSeq: 1 INVITE > >>>> Max-Forwards: 66 > >>>> Content-Length: 896 > >>>> Via: SIP/2.0/TCP > >>>> xxxxxxxxxx:5060;branch=z9hG4bK1a5ca0b3c42536a59ddec4c723f8774fk5555 > >>>> 5 > >>>> 5 yaaaaacaaaaaaaaaaaaa3Zqkv7yujk3t0qbaaiaiaaaaabqaaaaaaaqaaaaaa > >>>> Via: SIP/2.0/TCP xxxxxxx:5082;branch=z9hG4bK1220390081-337970536 > >>>> Route: > >>>> sip:xxxx.cgah.ims.mncxxx.mccxxx.3gppnetwork.org;callhalf=orig;lr > >>>> Route: > >>>> sip:3Zqkv7%2FcaGmGRV9neaaaacgloTpN3kFNU6jv2EObabaecaSdeaaaadsip%3A% > >>>> 2 > >>>> B > >>>> xxxxxxxx%40ims.mncxxx.mccxxx.3gppnetwork.orgOLxz6Geaeaqxxxxxxxxxxx% > >>>> 4 > >>>> 0 ims.mncxxx.mcc3xxx.3gppnetwork.org@xxxxxxxxxxxx:5060;lr > >>>> Record-Route: > >>>> sip:3Zqkv7%20caqmGRV9ngaaaaaQjv2EObabaeaaaaamsip%3A%2Bxxxxxxx%40ims. > >>>> m > >>>> ncxxx.mccxxx.3gppnetwork.org@scscf2.ims.mncxxxx.mccxxxx.3gppnetwork. > >>>> o > >>>> rg:5060;maddr=xxxxxxxxx;lr > >>>> Contact: > sip:p65539t1617206731m169121c110882s1@xxxxxxxx:5082;+g.3gpp.accesstype="cellular";+g.3gpp.icsi-ref="urn%3Aurn-7%3A3gpp-service.ims.icsi.mmtel<sip:p65539t1617206731m169121c110882s1@xxxxxxxx:5082;+g.3gpp.accesstype=%22cellular%22;+g.3gpp.icsi-ref=%22urn%3Aurn-7%3A3gpp-service.ims.icsi.mmtel > >" > >>>> Content-Type: application/sdp > >>>> Allow: REGISTER, REFER, NOTIFY, SUBSCRIBE, INFO, MESSAGE, PRACK, > >>>> UPDATE, INVITE, ACK, OPTIONS, CANCEL, BYE > >>>> Accept-Contact: > *;+g.3gpp.icsi-ref="urn%3Aurn-7%3A3gpp-service.ims.icsi.mmtel" > >>>> Supported: timer, 100rel, path, precondition, replaces > >>>> P-Asserted-Identity: > >>>> sip:xxxxxxxxx@ims.mnc420.mcc312.3gppnetwork.org > >>>> P-Asserted-Identity: tel:xxxxxxxxx <xxxxxxxxx> > >>>> Proxy-Authorization: Digest > >>>> uri=sip:*99;phone-context=ims.mnc4xxx.mccxxx.3gppnetwork.org@ims.mn > >>>> c > >>>> x > >>>> xx.mccxxx.3gppnetwork.org > <https://urldefense.com/v3/__http://xx.mccxxx.3gppnetwork.org/__;!!N14HnBHF!q9wWho1cNUwvzcZ8DPi8PsgND6ZUxdV4-VKsWX8A7KKpPQawDODmrKVq_1I$> > ;user=phone,response="",nonce="",realm="", > >>>> u > >>>> s > >>>> ername=xxxxxxxxxxxxxx@ims.mncxxx.mcc3xxx.3gppnetwork.org<mailto:xxx > >>>> x x xxxxxxxxx@ims.mncxxx.mcc3xxx.3gppnetwork.org> > >>>> P-Visited-Network-ID: ims.mnc420.mcc312.3gppnetwork.org > <https://urldefense.com/v3/__https://protect2.fireeye.com/v1/url?k=34ec8226-6b77bb1a-34ecc2bd-86b1886cfa64-e171fd55781981c8&q=1&e=0857f501-f35f-4a5a-b9cc-18fdb5033d11&u=http*3A*2F*2Fims.mnc420.mcc312.3gppnetwork.org*2F__;JSUlJQ!!N14HnBHF!q9wWho1cNUwvzcZ8DPi8PsgND6ZUxdV4-VKsWX8A7KKpPQawDODm_E69mA8$> > >>>> P-Access-Network-Info: > >>>> 3GPP-E-UTRAN-FDD;local-time-zone="2021-03-31T11:05:31-05:00";utran- > >>>> c > >>>> e > >>>> ll-id-3gpp=xxxxxxxxxxxxxxxxxxxxxxxx > >>>> Min-SE: 900 > >>>> Session-Expires: 1800 > >>>> P-Charging-Vector: > >>>> icid-value=pcscf2.ims.mncxxx.mcc3xxx.3gppnetw-1617-206731-149675;ic > >>>> i > >>>> d > >>>> -generated-at=pcscf2.ims.mncxxx.mccxxx.3gppnetwork.org > <https://urldefense.com/v3/__http://ims.mncxxx.mccxxx.3gppnetwork.org/__;!!N14HnBHF!q9wWho1cNUwvzcZ8DPi8PsgND6ZUxdV4-VKsWX8A7KKpPQawDODmzkbVY5k$> > ;orig-ioi=ims. > >>>> m > >>>> ncxxx.mccxxxx.3gppnetwork.org > <https://urldefense.com/v3/__https://protect2.fireeye.com/v1/url?k=eeef46a8-b1747f94-eeef0633-86b1886cfa64-e50d414254cbb27d&q=1&e=0857f501-f35f-4a5a-b9cc-18fdb5033d11&u=http*3A*2F*2Fncxxx.mccxxxx.3gppnetwork.org*2F__;JSUlJQ!!N14HnBHF!q9wWho1cNUwvzcZ8DPi8PsgND6ZUxdV4-VKsWX8A7KKpPQawDODmmgQ1NYU$> > >>>> User-Agent: Ericsson MTAS - CXP2010134/1 R20F14 > >>>> P-Charging-Function-Addresses: ccf="xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx" > >>>> P-Served-User: > >>>> sip:xxxxxxxxxxx@ims.mnc420.mcc312.3gppnetwork.org;sescase=orig;regs > >>>> t > >>>> a > >>>> te=reg > >>>> Feature-Caps: *;+g.3gpp.registration-token="<63b9cf28>" > >>>> P-Early-Media: supported > >>>> Session-ID: 7c386176b888d13d404845e189d6885b > >>>> > >>>> From: Chris Wendt > >>>> <chris-ietf@chriswendt.net<mailto:chris-ietf@chriswendt.net>> > >>>> Sent: Wednesday, April 7, 2021 10:10 AM > >>>> To: Christer Holmberg > >>>> <christer.holmberg@ericsson.com<mailto:christer.holmberg@ericsson.c > <christer.holmberg@ericsson.com%3cmailto:christer.holmberg@ericsson.c%0b>>>>> > o > >>>> m > >>>>>> > >>>> Cc: Zerr, Brad <BZerr@tnsi.com<mailto:BZerr@tnsi.com>>; Marc > >>>> Petit-Huguenin > >>>> <marc@petit-huguenin.org<mailto:marc@petit-huguenin.org>>; Cullen > >>>> Jennings <fluffy@iii.ca<mailto:fluffy@iii.ca>>; IETF STIR Mail List > >>>> <stir@ietf.org<mailto:stir@ietf.org>>; Eric Rescorla > >>>> <ekr@rtfm.com<mailto:ekr@rtfm.com>>; Jon Peterson > >>>> <jon.peterson@neustar.biz<mailto:jon.peterson@neustar.biz>>; Toy, > >>>> Arthur <atoy@tnsi.com<mailto:atoy@tnsi.com>> > >>>> Subject: Re: [stir] RFC 8224 > >>>> > >>>> This is a legit question for RFC8224 and agree with the answers, but > just in case it’s relevant you would not send these types of SIP URIs as > dest in context of STIR/SHAKEN (over NNI/peering relationship) which only > supports tel URIs currently. That may not be your use-case but just wanted > to clarify in case it was relevant. I would be curious to know the context > if you are willing to share though, i am guessing intra network use case > between device and app server? Definitely interested in those cases, for me > in context of delegate certs. > >>>> > >>>> -Chris > >>>> > >>>> > >>>> > >>>> On Apr 7, 2021, at 9:52 AM, Christer Holmberg < > christer.holmberg@ericsson.com<mailto:christer.holmberg@ericsson.com>> > wrote: > >>>> > >>>> Hi, > >>>> > >>>> ´*´ can be used as such in a SIP-URI, but ‘#’ would have to be > escaped. > >>>> > >>>> So: > >>>> > >>>> To: > >>>> sip:*55;phone-context=ims.mnc420.mcc312.3gppnetwork.org@ims.mnc420. > >>>> m > >>>> c > >>>> c312.3gppnetwork.org > <https://urldefense.com/v3/__http://c312.3gppnetwork.org/__;!!N14HnBHF!q9wWho1cNUwvzcZ8DPi8PsgND6ZUxdV4-VKsWX8A7KKpPQawDODmVfPlssk$> > ;user=phone > >>>> > >>>> …is ok, but; > >>>> > >>>> To: > >>>> sip:#55;phone-context=ims.mnc420.mcc312.3gppnetwork.org@ims.mnc420. > >>>> m > >>>> c > >>>> c312.3gppnetwork.org > <https://urldefense.com/v3/__http://c312.3gppnetwork.org/__;!!N14HnBHF!q9wWho1cNUwvzcZ8DPi8PsgND6ZUxdV4-VKsWX8A7KKpPQawDODmVfPlssk$> > ;user=phone<sip:*55;phone-context=ims.mnc420.mc > <https://urldefense.com/v3/__https://protect2.fireeye.com/v1/url?k=de790f19-81e23625-de794f82-86b1886cfa64-8040fe565ed6c82c&q=1&e=0857f501-f35f-4a5a-b9cc-18fdb5033d11&u=http*3A*2F*2Fims.mnc420.mc*2F__;JSUlJQ!!N14HnBHF!q9wWho1cNUwvzcZ8DPi8PsgND6ZUxdV4-VKsWX8A7KKpPQawDODmXz7Bjus$> > >>>> c > >>>> 3 12.3gppnetwork.org@ims.mnc420.mcc312.3gppnetwork.org;user=phone> > >>>> > >>>> …is NOT ok. Instead: > >>>> > >>>> To: > >>>> sip:%2355;phone-context=ims.mnc420.mcc312.3gppnetwork.org@ims.mnc420. > >>>> mcc312.3gppnetwork.org > <https://urldefense.com/v3/__http://mcc312.3gppnetwork.org/__;!!N14HnBHF!q9wWho1cNUwvzcZ8DPi8PsgND6ZUxdV4-VKsWX8A7KKpPQawDODmFbxZBbE$> > ;user=phone > >>>> > >>>> …will have to be used. > >>>> > >>>> Regards, > >>>> > >>>> Christer > >>>> > >>>> > >>>> > >>>> From: Zerr, Brad <BZerr@tnsi.com<mailto:BZerr@tnsi.com>> > >>>> Sent: keskiviikko 7. huhtikuuta 2021 14.27 > >>>> To: Christer Holmberg > >>>> <christer.holmberg@ericsson.com<mailto:christer.holmberg@ericsson.c > <christer.holmberg@ericsson.com%3cmailto:christer.holmberg@ericsson.c%0b>>>>> > o > >>>> m > >>>>>> ; Marc Petit-Huguenin > >>>> <marc@petit-huguenin.org<mailto:marc@petit-huguenin.org>>; Cullen > >>>> Jennings <fluffy@iii.ca<mailto:fluffy@iii.ca>>; IETF STIR Mail List > >>>> <stir@ietf.org<mailto:stir@ietf.org>> > >>>> Cc: chris-ietf@chriswendt.net<mailto:chris-ietf@chriswendt.net>; > >>>> Eric Rescorla <ekr@rtfm.com<mailto:ekr@rtfm.com>>; Jon Peterson > >>>> <jon.peterson@neustar.biz<mailto:jon.peterson@neustar.biz>>; Toy, > >>>> Arthur <atoy@tnsi.com<mailto:atoy@tnsi.com>> > >>>> Subject: RE: [stir] RFC 8224 > >>>> > >>>> Good Morning. > >>>> > >>>> Would you mind providing an example of what the TO header should look > like for both a * and # dial to help clear up? Assume they are leading > characters in the TO header. > >>>> > >>>> Example of what is being sent today: > >>>> > >>>> To: > >>>> sip:*55;phone-context=ims.mnc420.mcc312.3gppnetwork.org@ims.mnc420. > >>>> m > >>>> c > >>>> c312.3gppnetwork.org > <https://urldefense.com/v3/__http://c312.3gppnetwork.org/__;!!N14HnBHF!q9wWho1cNUwvzcZ8DPi8PsgND6ZUxdV4-VKsWX8A7KKpPQawDODmVfPlssk$> > ;user=phone > >>>> > >>>> To: > >>>> sip:#55;phone-context=ims.mnc420.mcc312.3gppnetwork.org@ims.mnc420. > >>>> m > >>>> c > >>>> c312.3gppnetwork.org > <https://urldefense.com/v3/__http://c312.3gppnetwork.org/__;!!N14HnBHF!q9wWho1cNUwvzcZ8DPi8PsgND6ZUxdV4-VKsWX8A7KKpPQawDODmVfPlssk$> > ;user=phone<sip:*55;phone-context=ims.mnc420.mc > <https://urldefense.com/v3/__https://protect2.fireeye.com/v1/url?k=8b69ba29-d4f28315-8b69fab2-86b1886cfa64-770258b0ccf0eabc&q=1&e=0857f501-f35f-4a5a-b9cc-18fdb5033d11&u=http*3A*2F*2Fims.mnc420.mc*2F__;JSUlJQ!!N14HnBHF!q9wWho1cNUwvzcZ8DPi8PsgND6ZUxdV4-VKsWX8A7KKpPQawDODmuZBnGaY$> > >>>> c > >>>> 3 12.3gppnetwork.org@ims.mnc420.mcc312.3gppnetwork.org;user=phone> > >>>> > >>>> From: Christer Holmberg > >>>> <christer.holmberg@ericsson.com<mailto:christer.holmberg@ericsson.c > <christer.holmberg@ericsson.com%3cmailto:christer.holmberg@ericsson.c%0b>>>>> > o > >>>> m > >>>>>> > >>>> Sent: Wednesday, April 7, 2021 3:14 AM > >>>> To: Marc Petit-Huguenin > >>>> <marc@petit-huguenin.org<mailto:marc@petit-huguenin.org>>; Cullen > >>>> Jennings <fluffy@iii.ca<mailto:fluffy@iii.ca>>; Zerr, Brad > >>>> <BZerr@tnsi.com<mailto:BZerr@tnsi.com>>; IETF STIR Mail List > >>>> <stir@ietf.org<mailto:stir@ietf.org>> > >>>> Cc: chris-ietf@chriswendt.net<mailto:chris-ietf@chriswendt.net>; > >>>> Eric Rescorla <ekr@rtfm.com<mailto:ekr@rtfm.com>>; Jon Peterson > >>>> <jon.peterson@neustar.biz<mailto:jon.peterson@neustar.biz>>; Toy, > >>>> Arthur <atoy@tnsi.com<mailto:atoy@tnsi.com>> > >>>> Subject: RE: [stir] RFC 8224 > >>>> > >>>> Hi, > >>>> > >>>>> I think the question was about the format to use before > canonicalization. > >>>>> > >>>>> My understanding of RFC 3986 is that `#` should be escaped because > it is the delimiter for an URI fragment. Fragments are not defined in SIP > URIs, but a generic URI parser may still remove everything after and > including '#'. > >>>> > >>>> "#" will have to be escaped in a SIP-URI, e.g., in a To header field. > >>>> > >>>> But, Section 8.3 of RFC 8224 has nothing to do with a SIP-URI or the > To header field. > >>>> > >>>> Regards, > >>>> > >>>> Christer > >>>> > >>>> > >>>> > >>>> > >>>> > >>>> > >>>> > >>>> OTOH there is no need to escape '*' as it is part of the `sub-delims` > rule. > >>>> > >>>> so > >>>> > >>>> .... > >>>> To: > >>>> sip:*55;phone-context=ims.mnc420.mcc312.3gppnetwork.org@ims.mnc420. > >>>> m > >>>> c > >>>> c312.3gppnetwork.org > <https://urldefense.com/v3/__http://c312.3gppnetwork.org/__;!!N14HnBHF!q9wWho1cNUwvzcZ8DPi8PsgND6ZUxdV4-VKsWX8A7KKpPQawDODmVfPlssk$> > ;user=phone > >>>> .... > >>>> > >>>> is fine, but dialing directly an extension would be: > >>>> > >>>> .... > >>>> To: sip:+14085550460%2377@example.org;user=phone > >>>> .... > >>>> > >>>> On 4/6/21 5:43 AM, Christer Holmberg wrote: > >>>>> Hi, > >>>>> > >>>>> %2A is not the ASCII format of *, it is the escaped (see RFC 3261). > >>>>> > >>>>> And, the syntax allows both * and #, so no need to escape (in fact, > it is not even possible to escape in this case): > >>>>> > >>>>> tn-spec = 1*tn-char > >>>>> tn-char = "#" / "*" / DIGIT > >>>>> > >>>>> Also, note that RFC 8224 does not define the syntax of the To header > field - that is done in RFC 3261. The telephone number described in Section > 8.3 of RFC 8224 will be included in the PASSPort (RFC 8225). > >>>>> > >>>>> Regards, > >>>>> > >>>>> Christer > >>>>> > >>>>> From: stir <stir-bounces@ietf.org<mailto:stir-bounces@ietf.org>> > >>>>> On Behalf Of Cullen Jennings > >>>>> Sent: tiistai 6. huhtikuuta 2021 15.30 > >>>>> To: Zerr, Brad <BZerr@tnsi.com<mailto:BZerr@tnsi.com>>; IETF STIR > >>>>> Mail List <stir@ietf.org<mailto:stir@ietf.org>> > >>>>> Cc: chris-ietf@chriswendt.net<mailto:chris-ietf@chriswendt.net>; > >>>>> Eric Rescorla <ekr@rtfm.com<mailto:ekr@rtfm.com>>; Jon Peterson > >>>>> <jon.peterson@neustar.biz<mailto:jon.peterson@neustar.biz>>; Toy, > >>>>> Arthur <atoy@tnsi.com<mailto:atoy@tnsi.com>> > >>>>> Subject: Re: [stir] RFC 8224 > >>>>> > >>>>> > >>>>> Adding to STIR mailing list … > >>>>> > >>>>> > >>>>> On Apr 5, 2021, at 9:19 AM, Zerr, Brad < > BZerr@tnsi.com<mailto:BZerr@tnsi.com<mailto:BZerr@tnsi.com%3cmailto:BZerr@tnsi.com > <BZerr@tnsi.com%3cmailto:BZerr@tnsi.com%3cmailto:BZerr@tnsi.com%3cmailto:BZerr@tnsi.com>>>> > wrote: > >>>>> > >>>>> Good Morning. > >>>>> > >>>>> This may not be the correct process, so let me know if I should ask > this in a different forum. > >>>>> > >>>>> I had a question regarding section 8.3 when it comes to * and # > >>>>> handling. Is this stating that when a * or # proceeds a digit > >>>>> string (i.e. *55), it should be in ASCI Format for the * (i.e. > >>>>> %2A) > >>>>> > >>>>> <image001.png> > >>>>> > >>>>> So Instead of this: > >>>>> > >>>>> To: > >>>>> sip:*55;phone-context=ims.mnc420.mcc312.3gppnetwork.org@ims.mnc420. > >>>>> m > >>>>> cc312.3gppnetwork.org > <https://urldefense.com/v3/__http://cc312.3gppnetwork.org/__;!!N14HnBHF!q9wWho1cNUwvzcZ8DPi8PsgND6ZUxdV4-VKsWX8A7KKpPQawDODmfRONVeE$> > ;user=phone > >>>>> > >>>>> It should be this > >>>>> > >>>>> To: > >>>>> sip:%2A55;phone-context=ims.mnc420.mcc312.3gppnetwork.org@ims.mnc4 > >>>>> 2 > >>>>> 0 > >>>>> .mcc312.3gppnetwork.org > <https://urldefense.com/v3/__http://mcc312.3gppnetwork.org/__;!!N14HnBHF!q9wWho1cNUwvzcZ8DPi8PsgND6ZUxdV4-VKsWX8A7KKpPQawDODmFbxZBbE$> > ;user=phone > >>>>> > >>>>> > >>>>> > >>>> > >>>> > >>> > >> > >> > >> -- > > > > > -- > Marc Petit-Huguenin > Email: marc@petit-huguenin.org > Blog: > https://protect2.fireeye.com/v1/url?k=28d0d527-774bedc5-28d095bc-86073b36ea28-f2c358423b8421cd&q=1&e=78d08abe-b951-45e0-a93d-4a2bc670a4be&u=https%3A%2F%2Fmarc.petit-huguenin.org%2F > <https://urldefense.com/v3/__https://protect2.fireeye.com/v1/url?k=28d0d527-774bedc5-28d095bc-86073b36ea28-f2c358423b8421cd&q=1&e=78d08abe-b951-45e0-a93d-4a2bc670a4be&u=https*3A*2F*2Fmarc.petit-huguenin.org*2F__;JSUlJQ!!N14HnBHF!q9wWho1cNUwvzcZ8DPi8PsgND6ZUxdV4-VKsWX8A7KKpPQawDODm6Ydzy3k$> > Profile: https://www.linkedin.com/in/petithug > <https://urldefense.com/v3/__https://www.linkedin.com/in/petithug__;!!N14HnBHF!q9wWho1cNUwvzcZ8DPi8PsgND6ZUxdV4-VKsWX8A7KKpPQawDODmoI6LC4M$> > > > ------------------------------ > > > This e-mail message is for the sole use of the intended recipient(s) and > may > contain confidential and privileged information of Transaction Network > Services. > Any unauthorized reviews, use, disclosure or distribution is prohibited. > If you are not > the intended recipient, please 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original message. > ------------------------------ > > This email has been scanned for email related threats and delivered safely > by Mimecast. > For more information please visit http://www.mimecast.com > <https://urldefense.com/v3/__https://protect2.fireeye.com/v1/url?k=020077dc-5d9b4ef1-02003747-8692dc8284cb-ec95acff01abac94&q=1&e=1f14ae7d-a5b2-43c1-b945-f0c630ffb408&u=http*3A*2F*2Fwww.mimecast.com*2F__;JSUlJQ!!N14HnBHF!q9wWho1cNUwvzcZ8DPi8PsgND6ZUxdV4-VKsWX8A7KKpPQawDODmjtmQmno$> > ------------------------------ > > > ------------------------------ > > > This e-mail message is for the sole use of the intended recipient(s) and > may > contain confidential and privileged information of Transaction Network > Services. > Any unauthorized reviews, use, disclosure or distribution is prohibited. > If you are not > the intended recipient, please contact the sender by reply e-mail and > destroy all copies > of the original message. > > > > ------------------------------ > > This email has been scanned for email related threats and delivered safely > by Mimecast. > For more information please visit http://www.mimecast.com > <https://urldefense.com/v3/__https://protect2.fireeye.com/v1/url?k=d374985c-8cefa160-d374d8c7-86b1886cfa64-26115e6a3e22c2ad&q=1&e=776a0e59-f4eb-4d9d-9834-6391c543254b&u=http*3A*2F*2Fwww.mimecast.com*2F__;JSUlJQ!!N14HnBHF!q9wWho1cNUwvzcZ8DPi8PsgND6ZUxdV4-VKsWX8A7KKpPQawDODm-WDhmgg$> > ------------------------------ > > > > > ------------------------------ > > > This e-mail message is for the sole use of the intended recipient(s) and > may > contain confidential and privileged information of Transaction Network > Services. > Any unauthorized reviews, use, disclosure or distribution is prohibited. > If you are not > the intended recipient, please contact the sender by reply e-mail and > destroy all copies > of the original message. > > > > ------------------------------ > > This email has been scanned for email related threats and delivered safely > by Mimecast. > For more information please visit http://www.mimecast.com > <https://urldefense.com/v3/__http://www.mimecast.com/__;!!N14HnBHF!q9wWho1cNUwvzcZ8DPi8PsgND6ZUxdV4-VKsWX8A7KKpPQawDODmLPaDIuo$> > > > _______________________________________________ > stir mailing list > stir@ietf.org > https://www.ietf.org/mailman/listinfo/stir >
- Re: [stir] RFC 8224 Cullen Jennings
- Re: [stir] RFC 8224 Christer Holmberg
- Re: [stir] RFC 8224 Marc Petit-Huguenin
- Re: [stir] RFC 8224 Christer Holmberg
- Re: [stir] RFC 8224 Christer Holmberg
- Re: [stir] RFC 8224 Chris Wendt
- Re: [stir] RFC 8224 Christer Holmberg
- Re: [stir] RFC 8224 Chris Wendt
- Re: [stir] RFC 8224 Brian Rosen
- Re: [stir] RFC 8224 Chris Wendt
- Re: [stir] RFC 8224 Chris Wendt
- Re: [stir] RFC 8224 Christer Holmberg
- Re: [stir] RFC 8224 Marc Petit-Huguenin
- Re: [stir] RFC 8224 Christer Holmberg
- Re: [stir] RFC 8224 Marc Petit-Huguenin
- Re: [stir] RFC 8224 Christer Holmberg
- Re: [stir] RFC 8224 Marc Petit-Huguenin
- Re: [stir] RFC 8224 Christer Holmberg
- Re: [stir] RFC 8224 Marc Petit-Huguenin
- Re: [stir] RFC 8224 Marc Petit-Huguenin
- Re: [stir] RFC 8224 Christer Holmberg
- Re: [stir] RFC 8224 Christer Holmberg
- Re: [stir] RFC 8224 Christer Holmberg
- Re: [stir] RFC 8224 Christer Holmberg
- Re: [stir] RFC 8224 Chris Wendt
- Re: [stir] RFC 8224 Zerr, Brad
- Re: [stir] RFC 8224 Chris Wendt
- Re: [stir] RFC 8224 Peterson, Jon
- Re: [stir] RFC 8224 Roman Shpount
- Re: [stir] RFC 8224 Marc Petit-Huguenin