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commit e28c0acedc6f13459022f3324264e77c2da4f768
Author: Werner Koch <wk at gnupg.org>
Date: Wed Oct 5 13:06:48 2016 +0200
drafts,openpgp-webkey-service: Published -02
diff --git a/misc/id/openpgp-webkey-service/Makefile b/misc/id/openpgp-webkey-service/Makefile
index dad63f1..9023455 100644
--- a/misc/id/openpgp-webkey-service/Makefile
+++ b/misc/id/openpgp-webkey-service/Makefile
@@ -14,6 +14,7 @@ draft.txt, draft.xml: draft.org
--eval $(MD_EXAMPLE_FIX) \
--visit "draft.org" \
--eval "(org-md-export-to-markdown)"
+ sed -i 's/\*\*\(.*\):\*\*/"\1":/' draft.md
sed <draft.md -n '/^# Abstract/q;1,$$ p' >template.xml
sed <draft.md -n '/^# Abstract/,/^# Middle/p' | \
sed '1 d;$$ d' >tmp-abstract.md
diff --git a/misc/id/openpgp-webkey-service/draft-koch-openpgp-webkey-service-02.txt b/misc/id/openpgp-webkey-service/draft-koch-openpgp-webkey-service-02.txt
new file mode 100644
index 0000000..0ac9ab9
--- /dev/null
+++ b/misc/id/openpgp-webkey-service/draft-koch-openpgp-webkey-service-02.txt
@@ -0,0 +1,896 @@
+
+
+
+
+Network Working Group W. Koch
+Internet-Draft GnuPG Project
+Intended status: Informational October 5, 2016
+Expires: April 8, 2017
+
+
+ OpenPGP Web Key Service
+ draft-koch-openpgp-webkey-service-02
+
+Abstract
+
+ This specification describes a service to locate OpenPGP keys by mail
+ address using a Web service and the HTTPS protocol. It also provides
+ a method for secure communication between the key owner and the mail
+ provider to publish and revoke the public key.
+
+Status of This Memo
+
+ This Internet-Draft is submitted in full conformance with the
+ provisions of BCP 78 and BCP 79.
+
+ Internet-Drafts are working documents of the Internet Engineering
+ Task Force (IETF). Note that other groups may also distribute
+ working documents as Internet-Drafts. The list of current Internet-
+ Drafts is at http://datatracker.ietf.org/drafts/current/.
+
+ Internet-Drafts are draft documents valid for a maximum of six months
+ and may be updated, replaced, or obsoleted by other documents at any
+ time. It is inappropriate to use Internet-Drafts as reference
+ material or to cite them other than as "work in progress."
+
+ This Internet-Draft will expire on April 8, 2017.
+
+Copyright Notice
+
+ Copyright (c) 2016 IETF Trust and the persons identified as the
+ document authors. All rights reserved.
+
+ This document is subject to BCP 78 and the IETF Trust's Legal
+ Provisions Relating to IETF Documents
+ (http://trustee.ietf.org/license-info) in effect on the date of
+ publication of this document. Please review these documents
+ carefully, as they describe your rights and restrictions with respect
+ to this document. Code Components extracted from this document must
+ include Simplified BSD License text as described in Section 4.e of
+ the Trust Legal Provisions and are provided without warranty as
+ described in the Simplified BSD License.
+
+
+
+
+Koch Expires April 8, 2017 [Page 1]
+
+Internet-Draft OpenPGP Web Key Service October 2016
+
+
+Table of Contents
+
+ 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
+ 2. Notational Conventions . . . . . . . . . . . . . . . . . . . 2
+ 3. Web Key Directory . . . . . . . . . . . . . . . . . . . . . . 2
+ 3.1. Key Discovery . . . . . . . . . . . . . . . . . . . . . . 3
+ 4. Web Key Directory Update Protocol . . . . . . . . . . . . . . 4
+ 4.1. The Submission Address . . . . . . . . . . . . . . . . . 5
+ 4.2. The Submission Mail . . . . . . . . . . . . . . . . . . . 6
+ 4.3. The Confirmation Request . . . . . . . . . . . . . . . . 6
+ 4.4. The Confirmation Response . . . . . . . . . . . . . . . . 8
+ 4.5. Policy Flags . . . . . . . . . . . . . . . . . . . . . . 8
+ 5. Security Considerations . . . . . . . . . . . . . . . . . . . 9
+ 6. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 9
+ 6.1. Well-Known URI . . . . . . . . . . . . . . . . . . . . . 9
+ 7. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . 9
+ 8. Normative References . . . . . . . . . . . . . . . . . . . . 10
+ Appendix A. Sample Protocol Run . . . . . . . . . . . . . . . . 10
+ A.1. Sample Keys . . . . . . . . . . . . . . . . . . . . . . . 10
+ A.2. Sample Messages . . . . . . . . . . . . . . . . . . . . . 11
+ Appendix B. Changes Since -01 . . . . . . . . . . . . . . . . . 15
+ Author's Address . . . . . . . . . . . . . . . . . . . . . . . . 16
+
+1. Introduction
+
+ This memo describes a method to associate OpenPGP keys with a mail
+ address and how to look them up using a web service with a well-known
+ URI. In addition a mail based protocol is given to allow a client to
+ setup such an association and to maintain it.
+
+2. Notational Conventions
+
+ The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
+ "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
+ document are to be interpreted as described in [RFC2119].
+
+3. Web Key Directory
+
+ A major use case for OpenPGP is the encryption of mail. A common
+ difficulty of sending encrypted mails to a new communication partner
+ is to find the appropriate public key of the recipient. Unless an
+ off-channel key exchange has been done, there are no easy ways to
+ discover the required key. The common practice is to search the
+ network of public key servers for a key matching the recipient's mail
+ address. This practise bears the problem that the keyservers are not
+ able to give a positive confirmation that a key actually belongs to
+ the mail addresses given in the key. Further, there are often
+ several keys matching a mail address and thus one needs to pick a key
+
+
+
+Koch Expires April 8, 2017 [Page 2]
+
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+
+
+ on good luck. This is clearly not a secure way to setup an end-to-
+ end encryption. Even if the need for a trusted key for an initial
+ mail message is relinquished, a non-authenticated key may be a wrong
+ one and the actual recipient would receive a mail which she can't
+ decrypt, due to the use of a wrong key.
+
+ Methods to overcome this problem are
+
+ o sending an initial unencrypted message with the public key
+ attached,
+
+ o using the OpenPGP DANE protocol to lookup the recipients key via
+ the DNS.
+
+ The first method has the obvious problems of not even trying to
+ encrypt the initial mail, an extra mail round-trip, and problems with
+ unattended key discovery.
+
+ The latter method works fine but requires that mail providers need to
+ set up a separate DNS resolver to provide the key. The
+ administration of a DNS zone is often not in the hands of small mail
+ installations. Thus an update of the DNS resource records needs to
+ be delegated to the ISP running the DNS service. Further, DNS
+ lookups are not encrypted and missing all confidentially. Even if
+ the participating MUAs are using STARTTLS to encrypt the mail
+ exchange, a DNS lookup for the key unnecessarily identifies the
+ local-part of the recipients mail address to any passive
+ eavesdroppers.
+
+ This memo specified a new method for key discovery using an encrypted
+ https connection.
+
+3.1. Key Discovery
+
+ Although URIs are able to encode all kind of characters,
+ straightforward implementations of a key directory may want to store
+ the "local-part" of a mail address directly in the file system. This
+ forbids the use of certain characters in the "local-part". To allow
+ for such an implementation method the URI uses an encoded form of the
+ "local-part" which can be directly mapped to a file name.
+
+ OpenPGP defines its User IDs, and thus the mail address, as UTF-8
+ strings. To help with the common pattern of using capitalized names
+ (e.g. "Joe.Doe at example.org") for mail addresses, and under the
+ premise that almost all MTAs treat the "local-part" case-insensitive
+ and that the "domain-part" is required to be compared case-
+ insensitive anyway, all upper-case ASCII characters in a User ID are
+ mapped to lowercase. Non-ASCII characters are not changed.
+
+
+
+Koch Expires April 8, 2017 [Page 3]
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+
+
+ The so mapped "local-part" is hashed using the SHA-1 algorithm. The
+ resulting 160 bit digest is encoded using the Z-Base-32 method as
+ described in [RFC6189], section 5.1.6. The resulting string has a
+ fixed length of 32 octets. To form the URI, the scheme "https://" is
+ concatenated with the mapped "domain-part", the fixed string "/.well-
+ known/openpgpkey/hu/", and the above constructed 32 octet string.
+
+ For example the URI to lookup the key for Joe.Doe at Example.ORG is:
+
+ https://example.org/.well-known/openpgpkey/
+ hu/iy9q119eutrkn8s1mk4r39qejnbu3n5q
+
+ (line has been wrapped for rendering purposes)
+
+ The HTTP GET method MUST return the binary representation of the
+ OpenPGP key for the given mail address. The key needs to carry a
+ User ID packet ([RFC4880]) with that mail address. Note that the key
+ may be revoked or expired - it is up to the client to handle such
+ conditions. To ease distribution of revoked keys, a server may
+ return revoked keys in addition to a new key. The keys are returned
+ by a single request as concatenated key blocks.
+
+ The server MUST accept the HTTP HEAD method to allow a client to
+ check for the existence of a key.
+
+ The server SHOULD return "application/octet-string" as the Content-
+ Type for the data but clients SHOULD also accept any other Content-
+ Type. The server MUST NOT return an ASCII armored version of the
+ key.
+
+4. Web Key Directory Update Protocol
+
+ To put keys into the key directory a protocol to automate the task is
+ desirable. The protocol defined here is entirely based on mail and
+ the assumption that a mail provider can securely deliver mail to the
+ INBOX of a user (e.g. an IMAP folder). Note that the same protocol
+ may also be used for submitting keys for use with OpenPGP DANE.
+
+ We assume that the user already created a key for her mail account
+ alice at example.org. To install the key at her provider's Web Key
+ Directory, she performs the following steps:
+
+ 1. She retrieves a file which contains one line with the mail
+ address used to submit the key to the mail provider. See below
+ for the syntax of that file. For a mail address at the domain
+ "example.org" the URI of the file is
+
+ https://example.org/.well-known/openpgpkey/submission-address
+
+
+
+Koch Expires April 8, 2017 [Page 4]
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+
+
+ 2. She sends her key using SMTP (or any other transport mechanism)
+ to the provider using the submission address and key format as
+ specified by PGP/MIME.
+
+ 3. The provider checks that the received key has a User ID which
+ matches an account name of the provider.
+
+ 4. The provider sends an encrypted message containing a nonce and
+ the fingerprint of the key to the mail account of the user. Note
+ that a similar scheme is used by the well known caff(1) tool to
+ help with key signing parties.
+
+ 5. A legitimate user will be able to decrypt the message because she
+ created the key and is in charge of the private key. This step
+ verifies that the submitted key has actually been created by the
+ owner of the account.
+
+ 6. The user sends the decrypted nonce back to the submission address
+ as a confirmation that the private key is owned by her and that
+ the provider may now publish the key. Although technically not
+ required, it is suggested that the mail to the provider is
+ encrypted. The public key for this is retrieved using the key
+ lookup protocol described above.
+
+ 7. The provider receives the nonce, matches it with its database of
+ pending confirmations and then publishes the key. Finally the
+ provider sends a mail back to the user to notify her of the
+ publication of her key.
+
+ The message data structures used for the above protocol are specified
+ in detail below. In the following sections the string "WELLKNOWN"
+ denotes the first part of an URI specific for a domain. In the
+ examples the domain "example.org" is assumed, thus
+
+ WELLKNOWN := https://example.org/.well-known/openpgpkey
+
+ The term "target key" denotes the to be published key, the term
+ "submission key" the key associated with the submission-address of
+ the mail provider.
+
+4.1. The Submission Address
+
+ The address of the submission file is
+
+ WELLKNOWN/submission-address
+
+ The file consists of exactly one line, terminated by a LF, or the
+ sequence of CR and LF, with the full mail address to be used for
+
+
+
+Koch Expires April 8, 2017 [Page 5]
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+
+
+ submission of a key to the mail provider. For example the content of
+ the file may be
+
+ key-submission-example.org at directory.example.org
+
+4.2. The Submission Mail
+
+ The mail used to submit a key to the mail provider MUST comply to the
+ PGP/MIME specification ([RFC3156], section 7), which states that the
+ Content-Type must be "application/pgp-keys", there are no required or
+ optional parameters, and the body part contains the ASCII-armored
+ transferable Public Key Packets as defined in [RFC4880], section
+ 11.1.
+
+ The mail provider MUST publish a key capable of signing and
+ encryption for the submission-address in the Web Key Directory or via
+ DANE. The key to be published MUST be submitted using a PGP/MIME
+ encrypted message ([RFC3156], section 4). The message MUST NOT be
+ signed (because the authenticity of the signing key has not yet been
+ confirmed). After decryption of the message at the mail provider a
+ single "application/pgp-keys" part, as specified above, is expected.
+
+4.3. The Confirmation Request
+
+ The mail provider sends a confirmation mail in response to a received
+ key publication request. The message MUST be sent from the
+ submission-address of the mail provider to the mail address extracted
+ from the target key. The message needs to be a PGP/MIME signed
+ message using the submission key of the provider for the signature.
+ The signed message MUST have two parts:
+
+ The first part MUST have "text" as its Content-Type and can be used
+ to explain the purpose of the mail. For example it may point to this
+ RFC and explain on how to manually perform the protocol.
+
+ The second part jMUST have "application/vnd.gnupg.wkd" as its
+ Content-Type and carry an OpenPGP encrypted message in ASCII Armor
+ format. The message MUST be encrypted to the target key and MUST not
+ be signed. After decryption a text file in the Web Key data format
+ must be yielded.
+
+ That data format consists of name-value pairs with one name-value
+ pair per LF or CR+LF terminated line. Empty lines are allowed and
+ will be ignored by the receiver. A colon is used to terminate a
+ name.
+
+ In a confirmation request the following names MUST be send in the
+ specified order:
+
+
+
+Koch Expires April 8, 2017 [Page 6]
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+
+
+ o "type": The value must be "confirmation-request".
+
+ o "sender": This is the mailbox the user is expected to sent the
+ confirmation response to. The value must match the mailbox part
+ of the "From:" address of this request. Exactly one address MUST
+ be given.
+
+ o "address": The value is the addr-spec part of the target key's
+ mail address. The value SHOULD match the addr-spec part of the
+ recipient's address. The value MUST be UTF-8 encoded as required
+ for an OpenPGP User ID.
+
+ o "fingerprint": The value is the fingerprint of the target key.
+ The fingerprint is given in uppercase hex encoding without any
+ interleaving spaces.
+
+ o "nonce": The value is a string with a minimum length of 16 octets
+ and a maximum length of 64 octets. The string must entirely be
+ made up of random ASCII letters or digits. This nonce will be
+ sent back to the mail provider as proof that the recipient is the
+ legitimate owner of the target-key.
+
+ The receiver of that message is expected to verify the outer
+ signature and disregard the entire message if it can't be verified or
+ has not been signed by the key associated with the submission
+ address.
+
+ After the message as been verified the receiver decrypts the second
+ part of the message, checks that the "fingerprint" matches the target
+ key, checks that the "address" matches a User ID of the target key,
+ and checks the other constrains of the request format. If any
+ constraint is not asserted, or the fingerprint or User ID do not
+ match the target key, or there is no pending publication requests
+ (i.e. a mail recently sent o the submission address), the user MAY be
+ notified about this fake confirmation attempt.
+
+ In other cases the confirmation request is legitimate and the MUA
+ shall silently send a response as described in the next section.
+
+ The rationale for the outer signature used with this request is to
+ allow early detection of spam mails. This can be done prior to the
+ decryption step and avoids asking the user to enter a passphrase to
+ perform the decryption for a non-legitimate message. The use of a
+ simple encrypted attachment, instead of using PGP/MIME encryption, is
+ to convey the Content-Type of that attachment in the clear and also
+ to prevent automatic decryption of that attachment by PGP/MIME aware
+ clients. The MUA may in fact detect this confirmation request and
+ present a customized dialog for confirming that request.
+
+
+
+Koch Expires April 8, 2017 [Page 7]
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+
+
+4.4. The Confirmation Response
+
+ A response to a confirmation request MUST only be send in the
+ positive case; there is no negative confirmation response. A mail
+ service provider is expected to cancel a pending key submission after
+ a suitable time without a confirmation. The mail service provider
+ SHOULD NOT retry the sending of a confirmation request after the
+ first request has been send successfully.
+
+ The user MUST send the confirmation response from her target mail
+ address to the "from" address of the confirmation request. The
+ message MUST be signed and encrypted using the PGP/MIME Combined
+ format ([RFC3156], section 6.2). The signing key is the target key
+ and the encryption key is the key associated with the provider's
+ submission address.
+
+ The Content-Type used for the plaintext message MUST also be
+ "application/vnd.gnupg.wkd". The format is the same as described
+ above for the Confirmation Request. The body must contain three
+ name-value pairs in this order:
+
+ o "type": The value must be "confirmation-response".
+
+ o "sender": The value must match the mailbox part of the "From:"
+ address of this response. Exactly one address MUST be given.
+
+ o "nonce": The value is the value of the "nonce" parameter from the
+ confirmation request.
+
+4.5. Policy Flags
+
+ For key generation and submission it is sometimes useful to tell the
+ client about certain properties of the mail provider in advance.
+ This can be done with a file at the URL
+
+ WELLKNOWN/policy
+
+ The file contains keywords and optioanlly values, one per line with
+ each line terminated by a LF or the sequence of CR and LF. Empty
+ lines and lines starting with a '#' character are considered comment
+ lines. A keyword is made up of lowercase letters, digits, hyphens,
+ or dots. An underscore is allowed as a name space delimiters; see
+ below. The first character must be a letter. Keywords which are
+ defined to require a value are directly followed by a colon and then
+ after optional white space the value. Clients MUST use case-
+ insensitive matching for the keyword.
+
+ Currently defined keywords are:
+
+
+
+Koch Expires April 8, 2017 [Page 8]
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+
+
+ o "mailbox-only": The mail server provider does only accept keys
+ with only a mailbox in the User ID. In particular User IDs with a
+ real name in addition to the mailbox will be rejected as invalid.
+
+ o "dane-only": The mail server provider does not run a Web Key
+ Directory but only an OpenPGP DANE service. The Web Key Directory
+ Update protocol is used to update the keys for the DANE service.
+
+ o "auth-submit": The submission of the mail to the server is done
+ using an authenticated connection. Thus the submitted key will be
+ published immediately without any confirmation request.
+
+ More keywords will be defined in updates to this I-D. There is no
+ registry except for this document. For experimental use of new
+ features or for provider specific settings, keywords MUST be prefixed
+ with a domain name and an underscore.
+
+5. Security Considerations
+
+ The use of SHA-1 for the mapping of the "local-part" to a fixed
+ string is not a security feature but merely used to map the local-
+ part to a fixed-sized string made from a well defined set of
+ characters. It is not intended to conceal information about a mail
+ address.
+
+ The domain name part of the mail address is not part of the hash to
+ avoid problems with internationalized domain names. Instead a
+ separate URL is required for each domain name.
+
+6. IANA Considerations
+
+6.1. Well-Known URI
+
+ IANA is requested to assign a well-known URI in the "Well-Known URIs"
+ registry as defined by [RFC5785]:
+
+ URI suffix: openpgpkey
+
+ Change controller: IETF
+
+ Specification document: This
+
+7. Acknowledgments
+
+ The author would like to acknowledge the help of the individuals who
+ kindly voiced their opinions on the GnuPG mailing lists, in
+ particular, the help of Bernhard Reiter and Guilhem Moulin.
+
+
+
+
+Koch Expires April 8, 2017 [Page 9]
+
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+
+
+8. Normative References
+
+ [RFC2119] Bradner, S., "Key words for use in RFCs to Indicate
+ Requirement Levels", BCP 14, RFC 2119, March 1997.
+
+ [RFC3156] Elkins, M., Del Torto, D., Levien, R., and T. Roessler,
+ "MIME Security with OpenPGP", RFC 3156, August 2001.
+
+ [RFC4880] Callas, J., Donnerhacke, L., Finney, H., Shaw, D., and R.
+ Thayer, "OpenPGP Message Format", RFC 4880, November 2007.
+
+ [RFC5785] Nottingham, M. and E. Hammer-Lahav, "Defining Well-Known
+ Uniform Resource Identifiers (URIs)", RFC 5785, DOI
+ 10.17487/RFC5785, April 2010,
+ <http://www.rfc-editor.org/info/rfc5785>.
+
+ [RFC6189] Zimmermann, P., Johnston, A., Ed., and J. Callas, "ZRTP:
+ Media Path Key Agreement for Unicast Secure RTP", RFC
+ 6189, DOI 10.17487/RFC6189, April 2011,
+ <http://www.rfc-editor.org/info/rfc6189>.
+
+Appendix A. Sample Protocol Run
+
+ The following non-normative example can be used by implementors as
+ guidance.
+
+ Note that GnuPG version 2.1.12 supports the key discovery described
+ in version -00 of this document (auto-key-locate method "wkd").
+ Version 2.1.16 can run the protocol decribed in this document but is
+ also able to run the protocol version specified by -01.
+
+A.1. Sample Keys
+
+ This is the provider's submission key:
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+Koch Expires April 8, 2017 [Page 10]
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+
+
+ -----BEGIN PGP PRIVATE KEY BLOCK-----
+
+ lFgEV/TAohYJKwYBBAHaRw8BAQdAB/k9YQfSTI8qQqqK1KimH/BsvzsowWItSQPT
+ FP+fOC4AAP46uJ3Snno3Vy+kORye3rf0VvWvuz82voEQLxG6WpfHhREEtBprZXkt
+ c3VibWlzc2lvbkBleGFtcGxlLm5ldIh5BBMWCAAhBQJX9MCiAhsDBQsJCAcCBhUI
+ CQoLAgQWAgMBAh4BAheAAAoJEKhtNooW0cqEWMUA/0e9XaeptszWC9ZvPg8INL6a
+ BvRqPBYGU7PGmuXsxBovAQDyckOykG0UAfHVyN1w4gSK/biMcnqVr857i8/HuvjW
+ C5xdBFf0wKISCisGAQQBl1UBBQEBB0Apvaoe4MtSEJ1fpds/4DFl2kXXBpnVji/s
+ Wg9btdthNQMBCAcAAP9FJX99T1LEJzBnvBBnc6bimnT6/1OKM9RdO4R0/uVP6BFL
+ iGEEGBYIAAkFAlf0wKICGwwACgkQqG02ihbRyoTlGwD9FBr92osjL7HkhhZZ7Z2D
+ My3b9zpoZeMjvPg5YPqpdKMA/jhZoHuZCRMBYf7YRFb8aXtuyetDFZYrkjnum+OG
+ HFAD
+ =Hnwd
+ -----END PGP PRIVATE KEY BLOCK-----
+
+ This is the target key to be published:
+
+ -----BEGIN PGP PRIVATE KEY BLOCK-----
+
+ lFgEV2o9XRYJKwYBBAHaRw8BAQdAZ8zkuQDL9x7rcvvoo6s3iEF1j88Dknd9nZhL
+ nTEoBRkAAP94nCZMM4WY2IORXfM6phLGSz3RsHvs/vA1Opaus4+R3BKJtBtwYXRy
+ aWNlLmx1bXVtYmFAZXhhbXBsZS5uZXSIeQQTFggAIQUCV2o9XQIbAwULCQgHAgYV
+ CAkKCwIEFgIDAQIeAQIXgAAKCRATlWNoKgINCpkNAQDFDcwJUzsxu7aJUiPdpYXj
+ 4uVarrXakxEE8mGFotWhLAD9GH4rqLDYIE3NKEU0s+Okt4tEIwJaV8H1NNPPPMiK
+ 3g2cXQRXaj2NEgorBgEEAZdVAQUBAQdAFnnmZc99TuKk5iCq9wmYZUVF2RcXN2Cs
+ qAl8iGQQUWsDAQgHAAD/VN/VGmlcwGBPcLTya2hfU4t37nMcFCKdNSXjJ5DFA0AP
+ PohhBBgWCAAJBQJXaj2NAhsMAAoJEBOVY2gqAg0Ky4UA/0GmVaXzXemLvv1Xw4yx
+ Eaz/KfKKGc4RJ+38fyqUzw8NAQCohQ+ki3I5f84EXLZEiUiLsnVtOn1HNxvND/gW
+ TiFZBA==
+ =GHi7
+ -----END PGP PRIVATE KEY BLOCK-----
+
+A.2. Sample Messages
+
+ The first message triggeres the publication requests.
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+Koch Expires April 8, 2017 [Page 11]
+
+Internet-Draft OpenPGP Web Key Service October 2016
+
+
+ From: patrice.lumumba at example.net
+ To: key-submission at example.net
+ Subject: Key publishing request
+ MIME-Version: 1.0
+ Content-Type: multipart/encrypted;
+ protocol="application/pgp-encrypted";
+ boundary="=-=01-e8k41e11ob31eefa36wo=-="
+ Date: Wed, 05 Oct 2016 10:15:51 +0000
+
+
+ --=-=01-e8k41e11ob31eefa36wo=-=
+ Content-Type: application/pgp-encrypted
+
+ Version: 1
+
+ --=-=01-e8k41e11ob31eefa36wo=-=
+ Content-Type: application/octet-stream
+
+ -----BEGIN PGP MESSAGE-----
+
+ hF4DUgLY5tvmW2sSAQdAR1AcqvFpQe/fHRZbf0xcnl9Tb+AtwaX2yZnZXGELGHsw
+ 1/e3E0JptwM5tpRAVe71ooF8Zq4jl76ZgQKfj/SyjpLJxyoEDy2N5wTQaqW4JtML
+ 0ukB1vh7dIRDxBJX/LQIJC0wz8o1Q3vjcLJKFFvDb7YrerABpPIzwOAupcgIbQHj
+ 5m1+2WU5CL8ffyJy2h1jV2X4OnvWF1Sn6J6SVD6DfZpOPRt9TxSemJrN1LJ3lG0N
+ ts8AuYmCOeC1H2r5TYyxqkC98JF8+Nvyxd/fwne8IOjK9uixkNMC5H9/ZOH0YWCb
+ wBnNB4iXuym4OIPxiLkDymsVF0ww/XrODE9Y259EGmO45VFNrJAX3HFs9/PcMCVk
+ n2qMyEkr8LHiXeEPun6Z54RHUPYv2cUkEZ0hhSJ+rtBxkc/5D/cAScCEXRKFSKEF
+ jLJAvLK/u/ga5DAzVai+vh6b6Bq+YVPaD9GWMhWj4CgR90p9LULi6S/Hzwhv9Wzf
+ 8fJoJOaDjyvRDgr09jYLWamxkS9NWxqwy6MXJvxwbNdd5XtqiW4Y4o0Ll1hDJhxR
+ ljn/XvotXKwhKN+4QGhIXDVt4Dl4XxS5ptWfVTau8W8DYqDsU2obEcfsirZv53M1
+ Q9FCD8CD9+dkBt8VAJekCWVhEltcRHxlrznbk2jxm93xSD2o6gZ5X0VSaSUXyEhm
+ J+8F3gyTHGgbq/TgyjFoockWh5EtGgAFuWvmPJCF5PO/UaNeoKwgwSJBu6oTXkHx
+ R4nvvMRcj5UgTsKpZ79NiDQukbjG5ScNT5TCUiiZsBXBqBx3fD61EH6cAuh4P3Kr
+ iM7PY4fwAHo890Dx+Qlt
+ =WIhx
+ -----END PGP MESSAGE-----
+
+ --=-=01-e8k41e11ob31eefa36wo=-=--
+
+ The server decrypts this message to
+
+
+
+
+
+
+
+
+
+
+
+Koch Expires April 8, 2017 [Page 12]
+
+Internet-Draft OpenPGP Web Key Service October 2016
+
+
+ Content-Type: application/pgp-keys
+
+ -----BEGIN PGP PUBLIC KEY BLOCK-----
+
+ mDMEV2o9XRYJKwYBBAHaRw8BAQdAZ8zkuQDL9x7rcvvoo6s3iEF1j88Dknd9nZhL
+ nTEoBRm0G3BhdHJpY2UubHVtdW1iYUBleGFtcGxlLm5ldIh5BBMWCAAhBQJXaj1d
+ AhsDBQsJCAcCBhUICQoLAgQWAgMBAh4BAheAAAoJEBOVY2gqAg0KmQ0BAMUNzAlT
+ OzG7tolSI92lhePi5VqutdqTEQTyYYWi1aEsAP0YfiuosNggTc0oRTSz46S3i0Qj
+ AlpXwfU00888yIreDbg4BFdqPY0SCisGAQQBl1UBBQEBB0AWeeZlz31O4qTmIKr3
+ CZhlRUXZFxc3YKyoCXyIZBBRawMBCAeIYQQYFggACQUCV2o9jQIbDAAKCRATlWNo
+ KgINCsuFAP9BplWl813pi779V8OMsRGs/ynyihnOESft/H8qlM8PDQEAqIUPpIty
+ OX/OBFy2RIlIi7J1bTp9RzcbzQ/4Fk4hWQQ=
+ =qRfF
+ -----END PGP PUBLIC KEY BLOCK-----
+
+ and returns this confirmation request
+
+
+
+
+
+
+
+
+
+
+
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+
+Koch Expires April 8, 2017 [Page 13]
+
+Internet-Draft OpenPGP Web Key Service October 2016
+
+
+ From: key-submission at example.net
+ To: patrice.lumumba at example.net
+ Subject: Confirm your key publication
+ MIME-Version: 1.0
+ Content-Type: multipart/encrypted;
+ protocol="application/pgp-encrypted";
+ boundary="=-=01-wrzqued738dfx4x97u7y=-="
+ Date: Wed, 05 Oct 2016 10:16:57 +0000
+
+
+ --=-=01-wrzqued738dfx4x97u7y=-=
+ Content-Type: application/pgp-encrypted
+
+ Version: 1
+
+ --=-=01-wrzqued738dfx4x97u7y=-=
+ Content-Type: application/octet-stream
+
+ -----BEGIN PGP MESSAGE-----
+
+ hF4DkYWHjk/NdMASAQdAluQeqhECpU2T0zEyBAEbFzhLkpubN160wjkFCrtUc0Mw
+ FwYgM2fp9cvTMdJ/xjkvmAcIEOT4AY/hn1yFQ4z0KG0gCkSac+8mkDylnPdxlXYw
+ 0sBSAXlbqpVA7eUpFuU2Zs10zbIXxlwe6osR5wUIJut/RCOsYQmfvxC55x8mUX5/
+ zgTnNzlMzye5ws4pTgAeQm2x0Yv018L8IZgY5KxwJLBzlss0wLZ45ZcS80hR11Fx
+ NCow1fKF8lMnOJxagTEOih807nctz8vT5bR1gx0d7N3LM+th8nAg9/6Ghf1XTpLo
+ MzwGW0FtOG7Dg1Uxbw2bjaOuRBeh6IIpmNAw1pmIfnNu7PpoRydU5w1K/R8MT06z
+ MKdJ7IW5mVGes9EGnG3e4mjuILvNaZhfYy+a73IhDSaPm3oqdl1Qx7tbNg6lGjn6
+ KStCYAcPGPp3m7aWkfsPGThOVRhEXqaFFywfwSVEj1pdIRjDFA==
+ =Cdjh
+ -----END PGP MESSAGE-----
+
+ --=-=01-wrzqued738dfx4x97u7y=-=--
+
+ The client decrypts the attachment as
+
+ Content-Type: application/vnd.gnupg.wks
+ Content-Transfer-Encoding: 8bit
+
+ type: confirmation-request
+ sender: key-submission at example.net
+ address: patrice.lumumba at example.net
+ fingerprint: B21DEAB4F875FB3DA42F1D1D139563682A020D0A
+ nonce: f5pscz57zj6fk11wekk8gx4cmrb659a7
+
+ creates this response
+
+
+
+
+
+
+Koch Expires April 8, 2017 [Page 14]
+
+Internet-Draft OpenPGP Web Key Service October 2016
+
+
+ Content-Type: application/vnd.gnupg.wks
+ Content-Transfer-Encoding: 8bit
+
+ type: confirmation-response
+ sender: key-submission at example.net
+ address: patrice.lumumba at example.net
+ nonce: f5pscz57zj6fk11wekk8gx4cmrb659a7
+
+ and sends it encrypted to the server
+
+ From: patrice.lumumba at example.net
+ To: key-submission at example.net
+ Subject: Key publication confirmation
+ MIME-Version: 1.0
+ Content-Type: multipart/encrypted;
+ protocol="application/pgp-encrypted";
+ boundary="=-=01-iacqg4og4pqz11a5cg1o=-="
+ Date: Wed, 05 Oct 2016 10:18:52 +0000
+
+
+ --=-=01-iacqg4og4pqz11a5cg1o=-=
+ Content-Type: application/pgp-encrypted
+
+ Version: 1
+
+ --=-=01-iacqg4og4pqz11a5cg1o=-=
+ Content-Type: application/octet-stream
+
+ -----BEGIN PGP MESSAGE-----
+
+ hF4DUgLY5tvmW2sSAQdAnB1C3PMjS4AsGU0qaCqBdWQO5i6blWEyZrEsY+JZY1Qw
+ ooNq7zdVWOHhL9LPGAALAgoL3Qfz+dN2u5QamSQ/LJ2c8M0XipNs3lqlNH63yQN1
+ 0sAmAc3W8xkwul+rf6OLK/gMi6WzM4fnUhd4D1LJGIJoNUN0l3636C7ecOt2lkMl
+ 5bVAYg/SyMT3ymyfQnvtiem2T5DSnPsS1g6n6QNXWvkqvX9yGxNsNDJEHTuGJB8k
+ OJoRlfWQTEo6pgA89febWl1EdeM1pPLstQ2uZE8NPjXoY1nMxAlu+iPYsR41/4sg
+ dqwOv5BPLh/GIat8hh9SPWCA9iKlgSQ/EIv5DpjQogEzpriT55dkgfvSVYIAcOdO
+ ShZ91YKkcZffevdY72omqTk10a1SUXehPooIlRFmroDsi3VDaRKrUIo=
+ =7uve
+ -----END PGP MESSAGE-----
+
+ --=-=01-iacqg4og4pqz11a5cg1o=-=--
+
+Appendix B. Changes Since -01
+
+ o Changed the format of the confirmation request.
+
+ o Added sample messages.
+
+
+
+
+Koch Expires April 8, 2017 [Page 15]
+
+Internet-Draft OpenPGP Web Key Service October 2016
+
+
+Author's Address
+
+ Werner Koch
+ GnuPG Project
+
+ Email: wk at gnupg.org
+ URI: https://gnupg.org
+
+
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+Koch Expires April 8, 2017 [Page 16]
diff --git a/misc/id/openpgp-webkey-service/draft.org b/misc/id/openpgp-webkey-service/draft.org
index e259279..df58654 100644
--- a/misc/id/openpgp-webkey-service/draft.org
+++ b/misc/id/openpgp-webkey-service/draft.org
@@ -19,7 +19,7 @@
]>
<rfc ipr="trust200902" category="info"
- docName="draft-koch-openpgp-webkey-service-01">
+ docName="draft-koch-openpgp-webkey-service-02">
<?rfc toc="yes"?>
<?rfc symrefs="yes"?>
@@ -39,7 +39,7 @@
</address>
</author>
- <date month="May" year="2016" />
+ <date month="October" year="2016" />
<area>Security</area>
<abstract>
@@ -162,16 +162,20 @@ For example the URI to lookup the key for Joe.Doe at Example.ORG is:
(line has been wrapped for rendering purposes)
-The HTTP GET method MUST return the binary representation of the OpenPGP
-key for the given mail address. The key needs to carry a User ID packet
-({{{RFC(4880)}}}) with that mail address. Note that the key may be
-revoked or expired - it is up to the client to handle such conditions.
-The server MUST also accept a HEAD method so that a client may only
+The HTTP GET method MUST return the binary representation of the
+OpenPGP key for the given mail address. The key needs to carry a User
+ID packet ({{{RFC(4880)}}}) with that mail address. Note that the key
+may be revoked or expired - it is up to the client to handle such
+conditions. To ease distribution of revoked keys, a server may return
+revoked keys in addition to a new key. The keys are returned by a
+single request as concatenated key blocks.
+
+The server MUST accept the HTTP HEAD method to allow a client to
check for the existence of a key.
The server SHOULD return "application/octet-string" as the
-content-type for the data but clients SHOULD also accept any other
-content-type. The server MUST NOT return an ASCII armored version of
+Content-Type for the data but clients SHOULD also accept any other
+Content-Type. The server MUST NOT return an ASCII armored version of
the key.
* Web Key Directory Update Protocol
@@ -262,66 +266,89 @@ or optional parameters, and the body part contains the ASCII-armored
transferable Public Key Packets as defined in {{{RFC(4880)}}}, section
11.1.
-If the mail provider has published an encryption key for the
-submission-address in the Web Key Directory, the key to be published
-MUST be submitted using a PGP/MIME encrypted message ({{{RFC(3156)}}},
-section 4). The message MUST NOT be signed (because the authenticity of
-the signing key has not yet been confirmed). After decryption of the
-message at the mail provider a single "application/pgp-keys" part, as
-specified above, is expected.
+The mail provider MUST publish a key capable of signing and encryption
+for the submission-address in the Web Key Directory or via DANE. The
+key to be published MUST be submitted using a PGP/MIME encrypted
+message ({{{RFC(3156)}}}, section 4). The message MUST NOT be signed
+(because the authenticity of the signing key has not yet been
+confirmed). After decryption of the message at the mail provider a
+single "application/pgp-keys" part, as specified above, is expected.
** The Confirmation Request
The mail provider sends a confirmation mail in response to a received
-key publication request. The message SHOULD be sent from the
+key publication request. The message MUST be sent from the
submission-address of the mail provider to the mail address extracted
-from the target key. The message needs to be encrypted to the target key
-and MAY be signed by the submission key. PGP/MIME MUST be used for
-encryption and signing; the Combined method ({{{RFC(3156)}}}, section
-6.2) MUST be used if the message is to be signed.
-
-The Content-type used for the plaintext part MUST be
-"application/vnd.gnupg.wkd". The body consists of name-value pairs with
-one name-value pair per LF or CR+LF terminated line. Empty lines are
-allowed and will be ignored by the receiver. A colon is used to
-terminate a name.
-
-In a confirmation request the following names MUST be send in the
-specified order:
+from the target key. The message needs to be a PGP/MIME signed
+message using the submission key of the provider for the
+signature. The signed message MUST have two parts:
-- "type" :: The value must be "confirmation-request".
+The first part MUST have "text" as its Content-Type and can be used to
+explain the purpose of the mail. For example it may point to this RFC
+and explain on how to manually perform the protocol.
-- "sender" :: This is the mailbox the user is expected to sent the
- confirmation response to. The value must match the
- mailbox part of the "From:" address of this
- request. Exactly one address MUST be given.
+The second part jMUST have "application/vnd.gnupg.wkd" as its
+Content-Type and carry an OpenPGP encrypted message in ASCII Armor
+format. The message MUST be encrypted to the target key and MUST not
+be signed. After decryption a text file in the Web Key data format
+must be yielded.
-- "address" :: The value is the addr-spec part of the target key's
- mail address. The value SHOULD match the addr-spec part
- of the recipient's address. The value MUST be UTF-8
- encoded as required for an OpenPGP User ID.
+That data format consists of name-value pairs with one name-value pair
+per LF or CR+LF terminated line. Empty lines are allowed and will be
+ignored by the receiver. A colon is used to terminate a name.
-- "fingerprint" :: The value is the fingerprint of the target key. The
- fingerprint is given in uppercase hex encoding
- without any interleaving spaces.
-
-- "nonce" :: The value is a string with a minimum length of 16 octets
- and a maximum length of 64 octets. The string must
- entirely be made up of random ASCII letters or
- digits. This nonce will be sent back to the mail provider
- as proof that the recipient is the legitimate owner of
- the target-key.
+In a confirmation request the following names MUST be send in the
+specified order:
-The receiver of the message decrypts the message, checks that the
-"fingerprint" matches the target key, checks that the "address" matches
-a User ID of the target key, and checks the other constrains of the
-request format. If any constraint is not asserted, or the fingerprint or
-User ID do not match the target key, or there is no pending publication
-requests (i.e. a mail recently sent o the submission address), the user
-MAY be notified about this fake confirmation attempt.
+- type :: The value must be "confirmation-request".
+
+- sender :: This is the mailbox the user is expected to sent the
+ confirmation response to. The value must match the
+ mailbox part of the "From:" address of this
+ request. Exactly one address MUST be given.
+
+- address :: The value is the addr-spec part of the target key's
+ mail address. The value SHOULD match the addr-spec part
+ of the recipient's address. The value MUST be UTF-8
+ encoded as required for an OpenPGP User ID.
+
+- fingerprint :: The value is the fingerprint of the target key. The
+ fingerprint is given in uppercase hex encoding
+ without any interleaving spaces.
+
+- nonce :: The value is a string with a minimum length of 16 octets
+ and a maximum length of 64 octets. The string must
+ entirely be made up of random ASCII letters or
+ digits. This nonce will be sent back to the mail provider
+ as proof that the recipient is the legitimate owner of
+ the target-key.
+
+The receiver of that message is expected to verify the outer signature
+and disregard the entire message if it can't be verified or has not
+been signed by the key associated with the submission address.
+
+After the message as been verified the receiver decrypts the second part
+of the message, checks that the "fingerprint" matches the target key,
+checks that the "address" matches a User ID of the target key, and
+checks the other constrains of the request format. If any constraint
+is not asserted, or the fingerprint or User ID do not match the target
+key, or there is no pending publication requests (i.e. a mail recently
+sent o the submission address), the user MAY be notified about this
+fake confirmation attempt.
+
+In other cases the confirmation request is legitimate and the MUA
+shall silently send a response as described in the next section.
+
+The rationale for the outer signature used with this request is to
+allow early detection of spam mails. This can be done prior to the
+decryption step and avoids asking the user to enter a passphrase to
+perform the decryption for a non-legitimate message. The use of a
+simple encrypted attachment, instead of using PGP/MIME encryption, is
+to convey the Content-Type of that attachment in the clear and also to
+prevent automatic decryption of that attachment by PGP/MIME aware
+clients. The MUA may in fact detect this confirmation request and
+present a customized dialog for confirming that request.
-In other cases the confirmation request is legitimate and the MUA shall
-silently send a response as described in the next section.
** The Confirmation Response
@@ -333,24 +360,25 @@ the sending of a confirmation request after the first request has been
send successfully.
The user MUST send the confirmation response from her target mail
-address to the "from" address of the confirmation request. The message
-MUST be signed and SHOULD be encrypted. The PGP/MIME Combined format
-MUST be used for encryption and signing ({{{RFC(3156)}}}, section 6.2).
-The encryption key can be taken from the Web Key Directory.
+address to the "from" address of the confirmation request. The
+message MUST be signed and encrypted using the PGP/MIME Combined
+format ({{{RFC(3156)}}}, section 6.2). The signing key is the target
+key and the encryption key is the key associated with the provider's
+submission address.
-The Content-type used for the plaintext message MUST also be
+The Content-Type used for the plaintext message MUST also be
"application/vnd.gnupg.wkd". The format is the same as described above
for the Confirmation Request. The body must contain three name-value
pairs in this order:
-- "type" :: The value must be "confirmation-response".
+- type :: The value must be "confirmation-response".
-- "sender" :: The value must match the mailbox part of the "From:"
- address of this response. Exactly one address MUST be
- given.
+- sender :: The value must match the mailbox part of the "From:"
+ address of this response. Exactly one address MUST be
+ given.
-- "nonce" :: The value is the value of the "nonce" parameter from the
- confirmation request.
+- nonce :: The value is the value of the "nonce" parameter from the
+ confirmation request.
** Policy Flags
@@ -374,17 +402,17 @@ case-insensitive matching for the keyword.
Currently defined keywords are:
-- "mailbox-only" :: The mail server provider does only accept keys
+- mailbox-only :: The mail server provider does only accept keys
with only a mailbox in the User ID. In particular
User IDs with a real name in addition to the
mailbox will be rejected as invalid.
-- "dane-only" :: The mail server provider does not run a Web Key
+- dane-only :: The mail server provider does not run a Web Key
Directory but only an OpenPGP DANE service. The Web
Key Directory Update protocol is used to update the
keys for the DANE service.
-- "auth-submit" :: The submission of the mail to the server is done
+- auth-submit :: The submission of the mail to the server is done
using an authenticated connection. Thus the
submitted key will be published immediately without
any confirmation request.
@@ -404,7 +432,7 @@ intended to conceal information about a mail address.
The domain name part of the mail address is not part of the hash to
avoid problems with internationalized domain names. Instead a separate
-web service is required for each domain name.
+URL is required for each domain name.
* IANA Considerations
@@ -427,30 +455,212 @@ the help of Bernhard Reiter and Guilhem Moulin.
* Back
-* Test Vectors
+* Sample Protocol Run
+
+The following non-normative example can be used by implementors as
+guidance.
+
+Note that GnuPG version 2.1.12 supports the key discovery described in
+version -00 of this document (auto-key-locate method "wkd"). Version
+2.1.16 can run the protocol decribed in this document but is also able
+to run the protocol version specified by -01.
+
+** Sample Keys
+
+This is the provider's submission key:
+#+begin_example
+-----BEGIN PGP PRIVATE KEY BLOCK-----
+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+=Hnwd
+-----END PGP PRIVATE KEY BLOCK-----
+#+end_example
+
+This is the target key to be published:
+#+begin_example
+-----BEGIN PGP PRIVATE KEY BLOCK-----
+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+=GHi7
+-----END PGP PRIVATE KEY BLOCK-----
+#+end_example
+
+** Sample Messages
+
+The first message triggeres the publication requests.
+#+begin_example
+From: patrice.lumumba at example.net
+To: key-submission at example.net
+Subject: Key publishing request
+MIME-Version: 1.0
+Content-Type: multipart/encrypted;
+ protocol="application/pgp-encrypted";
+ boundary="=-=01-e8k41e11ob31eefa36wo=-="
+Date: Wed, 05 Oct 2016 10:15:51 +0000
+
+
+--=-=01-e8k41e11ob31eefa36wo=-=
+Content-Type: application/pgp-encrypted
+
+Version: 1
+
+--=-=01-e8k41e11ob31eefa36wo=-=
+Content-Type: application/octet-stream
+
+-----BEGIN PGP MESSAGE-----
+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+=WIhx
+-----END PGP MESSAGE-----
+
+--=-=01-e8k41e11ob31eefa36wo=-=--
+#+end_example
-For help implementing this specification a non-normative example is
-given:
+The server decrypts this message to
+#+begin_example
+Content-Type: application/pgp-keys
+
+-----BEGIN PGP PUBLIC KEY BLOCK-----
+
+mDMEV2o9XRYJKwYBBAHaRw8BAQdAZ8zkuQDL9x7rcvvoo6s3iEF1j88Dknd9nZhL
+nTEoBRm0G3BhdHJpY2UubHVtdW1iYUBleGFtcGxlLm5ldIh5BBMWCAAhBQJXaj1d
+AhsDBQsJCAcCBhUICQoLAgQWAgMBAh4BAheAAAoJEBOVY2gqAg0KmQ0BAMUNzAlT
+OzG7tolSI92lhePi5VqutdqTEQTyYYWi1aEsAP0YfiuosNggTc0oRTSz46S3i0Qj
+AlpXwfU00888yIreDbg4BFdqPY0SCisGAQQBl1UBBQEBB0AWeeZlz31O4qTmIKr3
+CZhlRUXZFxc3YKyoCXyIZBBRawMBCAeIYQQYFggACQUCV2o9jQIbDAAKCRATlWNo
+KgINCsuFAP9BplWl813pi779V8OMsRGs/ynyihnOESft/H8qlM8PDQEAqIUPpIty
+OX/OBFy2RIlIi7J1bTp9RzcbzQ/4Fk4hWQQ=
+=qRfF
+-----END PGP PUBLIC KEY BLOCK-----
+#+end_example
-** Sample key
+and returns this confirmation request
+#+begin_example
+From: key-submission at example.net
+To: patrice.lumumba at example.net
+Subject: Confirm your key publication
+MIME-Version: 1.0
+Content-Type: multipart/encrypted;
+ protocol="application/pgp-encrypted";
+ boundary="=-=01-wrzqued738dfx4x97u7y=-="
+Date: Wed, 05 Oct 2016 10:16:57 +0000
+
+
+--=-=01-wrzqued738dfx4x97u7y=-=
+Content-Type: application/pgp-encrypted
+
+Version: 1
+
+--=-=01-wrzqued738dfx4x97u7y=-=
+Content-Type: application/octet-stream
+
+-----BEGIN PGP MESSAGE-----
+
+hF4DkYWHjk/NdMASAQdAluQeqhECpU2T0zEyBAEbFzhLkpubN160wjkFCrtUc0Mw
+FwYgM2fp9cvTMdJ/xjkvmAcIEOT4AY/hn1yFQ4z0KG0gCkSac+8mkDylnPdxlXYw
+0sBSAXlbqpVA7eUpFuU2Zs10zbIXxlwe6osR5wUIJut/RCOsYQmfvxC55x8mUX5/
+zgTnNzlMzye5ws4pTgAeQm2x0Yv018L8IZgY5KxwJLBzlss0wLZ45ZcS80hR11Fx
+NCow1fKF8lMnOJxagTEOih807nctz8vT5bR1gx0d7N3LM+th8nAg9/6Ghf1XTpLo
+MzwGW0FtOG7Dg1Uxbw2bjaOuRBeh6IIpmNAw1pmIfnNu7PpoRydU5w1K/R8MT06z
+MKdJ7IW5mVGes9EGnG3e4mjuILvNaZhfYy+a73IhDSaPm3oqdl1Qx7tbNg6lGjn6
+KStCYAcPGPp3m7aWkfsPGThOVRhEXqaFFywfwSVEj1pdIRjDFA==
+=Cdjh
+-----END PGP MESSAGE-----
+
+--=-=01-wrzqued738dfx4x97u7y=-=--
+#+end_example
-TODO
+The client decrypts the attachment as
+#+begin_example
+Content-Type: application/vnd.gnupg.wks
+Content-Transfer-Encoding: 8bit
+
+type: confirmation-request
+sender: key-submission at example.net
+address: patrice.lumumba at example.net
+fingerprint: B21DEAB4F875FB3DA42F1D1D139563682A020D0A
+nonce: f5pscz57zj6fk11wekk8gx4cmrb659a7
+#+end_example
-** Software Notes
+creates this response
+#+begin_example
+Content-Type: application/vnd.gnupg.wks
+Content-Transfer-Encoding: 8bit
-GnuPG supports the key discovery described in version -00 of this
-document since version 2.1.12, 2.1.13 and the gurrent git version will
-be adjusted to the changes specs dfescribed in -01. To use it, the
-new method "wkd" needs to be used with the =--auto-key-locate= option.
+type: confirmation-response
+sender: key-submission at example.net
+address: patrice.lumumba at example.net
+nonce: f5pscz57zj6fk11wekk8gx4cmrb659a7
+#+end_example
-* Changes since -00
+and sends it encrypted to the server
+#+begin_example
+From: patrice.lumumba at example.net
+To: key-submission at example.net
+Subject: Key publication confirmation
+MIME-Version: 1.0
+Content-Type: multipart/encrypted;
+ protocol="application/pgp-encrypted";
+ boundary="=-=01-iacqg4og4pqz11a5cg1o=-="
+Date: Wed, 05 Oct 2016 10:18:52 +0000
+
+
+--=-=01-iacqg4og4pqz11a5cg1o=-=
+Content-Type: application/pgp-encrypted
+
+Version: 1
+
+--=-=01-iacqg4og4pqz11a5cg1o=-=
+Content-Type: application/octet-stream
+
+-----BEGIN PGP MESSAGE-----
+
+hF4DUgLY5tvmW2sSAQdAnB1C3PMjS4AsGU0qaCqBdWQO5i6blWEyZrEsY+JZY1Qw
+ooNq7zdVWOHhL9LPGAALAgoL3Qfz+dN2u5QamSQ/LJ2c8M0XipNs3lqlNH63yQN1
+0sAmAc3W8xkwul+rf6OLK/gMi6WzM4fnUhd4D1LJGIJoNUN0l3636C7ecOt2lkMl
+5bVAYg/SyMT3ymyfQnvtiem2T5DSnPsS1g6n6QNXWvkqvX9yGxNsNDJEHTuGJB8k
+OJoRlfWQTEo6pgA89febWl1EdeM1pPLstQ2uZE8NPjXoY1nMxAlu+iPYsR41/4sg
+dqwOv5BPLh/GIat8hh9SPWCA9iKlgSQ/EIv5DpjQogEzpriT55dkgfvSVYIAcOdO
+ShZ91YKkcZffevdY72omqTk10a1SUXehPooIlRFmroDsi3VDaRKrUIo=
+=7uve
+-----END PGP MESSAGE-----
+
+--=-=01-iacqg4og4pqz11a5cg1o=-=--
+#+end_example
-- Dropped the second occurrence of the domain name from the URL.
-- Changed field names in the request and response format.
-- Removed useless checks.
-- Added a new policy flag.
-** TODO
+* Changes Since -01
-- What about authenticated submission?
-- Describe how to handle a key with several User IDs.
+- Changed the format of the confirmation request.
+- Added sample messages.
-----------------------------------------------------------------------
Summary of changes:
misc/id/openpgp-webkey-service/Makefile | 1 +
.../draft-koch-openpgp-webkey-service-02.txt | 896 +++++++++++++++++++++
misc/id/openpgp-webkey-service/draft.org | 392 ++++++---
3 files changed, 1198 insertions(+), 91 deletions(-)
create mode 100644 misc/id/openpgp-webkey-service/draft-koch-openpgp-webkey-service-02.txt
hooks/post-receive
--
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