< draft-ietf-lamps-header-protection-03.txt   draft-ietf-lamps-header-protection-04.txt >
LAMPS Working Group D.K. Gillmor LAMPS Working Group D.K. Gillmor
Internet-Draft American Civil Liberties Union Internet-Draft American Civil Liberties Union
Intended status: Standards Track B. Hoeneisen Intended status: Standards Track B. Hoeneisen
Expires: 26 August 2021 pEp Foundation Expires: 21 November 2021 pEp Foundation
A. Melnikov A. Melnikov
Isode Ltd Isode Ltd
22 February 2021 20 May 2021
Header Protection for S/MIME Header Protection for S/MIME
draft-ietf-lamps-header-protection-03 draft-ietf-lamps-header-protection-04
Abstract Abstract
S/MIME version 3.1 has introduced a feasible standardized option to S/MIME version 3.1 has introduced a feasible standardized option to
accomplish Header Protection. However, few implementations generate accomplish Header Protection. However, few implementations generate
messages using this structure, and several legacy and non-legacy messages using this structure, and several legacy and non-legacy
implementations have revealed rendering issues at the receiving side. implementations have revealed rendering issues at the receiving side.
Clearer specifications regarding message processing, particularly Clearer specifications regarding message processing, particularly
with respect to header sections, are needed in order to resolve these with respect to header sections, are needed in order to resolve these
rendering issues. Some mail user agents are also sending and rendering issues. Some mail user agents are also sending and
skipping to change at page 1, line 46 skipping to change at page 1, line 46
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This Internet-Draft will expire on 26 August 2021. This Internet-Draft will expire on 21 November 2021.
Copyright Notice Copyright Notice
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Table of Contents Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 4 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 5
1.1. Two Schemes of Protected Headers . . . . . . . . . . . . 4 1.1. Two Schemes of Protected Headers . . . . . . . . . . . . 5
1.2. Problems with Wrapped Messages . . . . . . . . . . . . . 4 1.2. Problems with Wrapped Messages . . . . . . . . . . . . . 6
1.3. Motivation . . . . . . . . . . . . . . . . . . . . . . . 5 1.3. Problems with Injected Headers . . . . . . . . . . . . . 6
1.4. Other Protocols to Protect Email Headers . . . . . . . . 5 1.4. Motivation . . . . . . . . . . . . . . . . . . . . . . . 6
1.5. Requirements Language . . . . . . . . . . . . . . . . . . 6 1.5. Other Protocols to Protect Email Headers . . . . . . . . 7
1.6. Terms . . . . . . . . . . . . . . . . . . . . . . . . . . 6 1.6. Requirements Language . . . . . . . . . . . . . . . . . . 7
2. Problem Statement . . . . . . . . . . . . . . . . . . . . . . 9 1.7. Terms . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.1. Privacy . . . . . . . . . . . . . . . . . . . . . . . . . 9 2. Problem Statement . . . . . . . . . . . . . . . . . . . . . . 10
2.2. Security . . . . . . . . . . . . . . . . . . . . . . . . 9 2.1. Privacy . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.3. Usability . . . . . . . . . . . . . . . . . . . . . . . . 9 2.2. Security . . . . . . . . . . . . . . . . . . . . . . . . 11
2.4. Interoperability . . . . . . . . . . . . . . . . . . . . 9 2.3. Usability . . . . . . . . . . . . . . . . . . . . . . . . 11
3. Use Cases . . . . . . . . . . . . . . . . . . . . . . . . . . 10 2.4. Interoperability . . . . . . . . . . . . . . . . . . . . 11
3.1. Interactions . . . . . . . . . . . . . . . . . . . . . . 10 3. Use Cases . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.1.1. Main Use Case . . . . . . . . . . . . . . . . . . . . 10 3.1. Interactions . . . . . . . . . . . . . . . . . . . . . . 11
3.1.2. Backward Compatibility Use Cases . . . . . . . . . . 10 3.1.1. Main Use Case . . . . . . . . . . . . . . . . . . . . 11
3.2. Protection Levels . . . . . . . . . . . . . . . . . . . . 12 3.1.2. Backward Compatibility Use Cases . . . . . . . . . . 11
3.2.1. In-Scope . . . . . . . . . . . . . . . . . . . . . . 12 3.2. Protection Levels . . . . . . . . . . . . . . . . . . . . 13
3.2.2. Out-of-Scope . . . . . . . . . . . . . . . . . . . . 12 3.2.1. In-Scope . . . . . . . . . . . . . . . . . . . . . . 13
4. Specification . . . . . . . . . . . . . . . . . . . . . . . . 12 3.2.2. Out-of-Scope . . . . . . . . . . . . . . . . . . . . 13
4.1. Main Use Case . . . . . . . . . . . . . . . . . . . . . . 13 4. Specification . . . . . . . . . . . . . . . . . . . . . . . . 13
4.1.1. MIME Format . . . . . . . . . . . . . . . . . . . . . 13 4.1. Main Use Case . . . . . . . . . . . . . . . . . . . . . . 14
4.1.2. Sending Side . . . . . . . . . . . . . . . . . . . . 16 4.1.1. MIME Format . . . . . . . . . . . . . . . . . . . . . 14
4.1.3. Default Header Confidentiality Policy . . . . . . . . 21 4.1.2. Sending Side . . . . . . . . . . . . . . . . . . . . 17
4.1.4. Receiving Side . . . . . . . . . . . . . . . . . . . 22 4.1.3. Default Header Confidentiality Policy . . . . . . . . 22
4.2. Backward Compatibility Use Cases . . . . . . . . . . . . 30 4.1.4. Receiving Side . . . . . . . . . . . . . . . . . . . 23
4.2.1. Receiving Side MIME-Conformant . . . . . . . . . . . 31 4.2. Backward Compatibility Use Cases . . . . . . . . . . . . 31
4.2.2. Receiving Side Not MIME-Conformant . . . . . . . . . 31 4.2.1. Receiving Side MIME-Conformant . . . . . . . . . . . 32
5. Usability Considerations . . . . . . . . . . . . . . . . . . 32 4.2.2. Receiving Side Not MIME-Conformant . . . . . . . . . 32
5. Usability Considerations . . . . . . . . . . . . . . . . . . 33
5.1. Mixed Protections Within a Message Are Hard To 5.1. Mixed Protections Within a Message Are Hard To
Understand . . . . . . . . . . . . . . . . . . . . . . . 32 Understand . . . . . . . . . . . . . . . . . . . . . . . 33
5.2. Users Should Not Have To Choose a Header Confidentiality 5.2. Users Should Not Have To Choose a Header Confidentiality
Policy . . . . . . . . . . . . . . . . . . . . . . . . . 32 Policy . . . . . . . . . . . . . . . . . . . . . . . . . 33
6. Security Considerations . . . . . . . . . . . . . . . . . . . 32 6. Security Considerations . . . . . . . . . . . . . . . . . . . 33
7. Privacy Considerations . . . . . . . . . . . . . . . . . . . 32 7. Privacy Considerations . . . . . . . . . . . . . . . . . . . 33
8. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 32 8. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 33
9. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . 32 9. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . 33
10. References . . . . . . . . . . . . . . . . . . . . . . . . . 32 10. References . . . . . . . . . . . . . . . . . . . . . . . . . 33
10.1. Normative References . . . . . . . . . . . . . . . . . . 32 10.1. Normative References . . . . . . . . . . . . . . . . . . 33
10.2. Informative References . . . . . . . . . . . . . . . . . 33 10.2. Informative References . . . . . . . . . . . . . . . . . 34
Appendix A. Test Vectors . . . . . . . . . . . . . . . . . . . . 35 Appendix A. Test Vectors . . . . . . . . . . . . . . . . . . . . 36
A.1. Wrapped Message examples . . . . . . . . . . . . . . . . 35 A.1. Baseline Messages . . . . . . . . . . . . . . . . . . . . 36
A.1.1. Wrapped Message: signed-only, with PKCS7 A.1.1. No cryptographic protections over a simple message . 36
signedData . . . . . . . . . . . . . . . . . . . . . 35 A.1.2. S/MIME signed-only signedData over a simple message, No
A.1.2. Wrapped Message: signed-only, using multipart/ Header Protection . . . . . . . . . . . . . . . . . . 37
signed . . . . . . . . . . . . . . . . . . . . . . . 35 A.1.3. S/MIME signed-only multipart/signed over a simple
A.1.3. Wrapped Message: signed-and-encrypted . . . . . . . . 35 message, No Header Protection . . . . . . . . . . . . 39
A.2. Injected Headers examples . . . . . . . . . . . . . . . . 35 A.1.4. S/MIME encrypted and signed over a simple message, No
A.2.1. Injected Headers: signed-only, with PKCS7 Header Protection . . . . . . . . . . . . . . . . . . 41
signedData . . . . . . . . . . . . . . . . . . . . . 35 A.1.5. No cryptographic protections over a complex
A.2.2. Injected Headers: signed-only, using multipart/ message . . . . . . . . . . . . . . . . . . . . . . . 44
signed . . . . . . . . . . . . . . . . . . . . . . . 36 A.1.6. S/MIME signed-only signedData over a complex message,
A.2.3. Injected Headers: signed-and-encrypted with Legacy No Header Protection . . . . . . . . . . . . . . . . 45
Display part . . . . . . . . . . . . . . . . . . . . 36 A.1.7. S/MIME signed-only multipart/signed over a complex
A.2.4. Injected Headers: signed-and-encrypted without Legacy message, No Header Protection . . . . . . . . . . . . 47
Display part . . . . . . . . . . . . . . . . . . . . 36 A.1.8. S/MIME encrypted and signed over a complex message, No
A.3. Messages without Header Protection . . . . . . . . . . . 36 Header Protection . . . . . . . . . . . . . . . . . . 50
A.3.1. Unprotected Headers: signed-only, with PKCS7 A.2. Signed-only Messages . . . . . . . . . . . . . . . . . . 54
signedData . . . . . . . . . . . . . . . . . . . . . 36 A.2.1. S/MIME signed-only signedData over a simple message,
A.3.2. Unprotected Headers: signed-only, using multipart/ Wrapped Message . . . . . . . . . . . . . . . . . . . 54
signed . . . . . . . . . . . . . . . . . . . . . . . 36 A.2.2. S/MIME signed-only multipart/signed over a simple
A.3.3. Unprotected Headers: signed-and-encrypted . . . . . . 36 message, Wrapped Message . . . . . . . . . . . . . . 56
Appendix B. Additional information . . . . . . . . . . . . . . . 36 A.2.3. S/MIME signed-only signedData over a simple message,
B.1. Stored Variants of Messages with Bcc . . . . . . . . . . 36 Injected Headers . . . . . . . . . . . . . . . . . . 58
Appendix C. Text Moved from Above . . . . . . . . . . . . . . . 37 A.2.4. S/MIME signed-only multipart/signed over a simple
C.1. MIME Format . . . . . . . . . . . . . . . . . . . . . . . 37 message, Injected Headers . . . . . . . . . . . . . . 60
C.1.1. S/MIME Specification . . . . . . . . . . . . . . . . 37 A.2.5. S/MIME signed-only signedData over a complex message,
C.1.2. Sending Side . . . . . . . . . . . . . . . . . . . . 40 Wrapped Message . . . . . . . . . . . . . . . . . . . 62
Appendix D. Document Considerations . . . . . . . . . . . . . . 44 A.2.6. S/MIME signed-only multipart/signed over a complex
Appendix E. Document Changelog . . . . . . . . . . . . . . . . . 45 message, Wrapped Message . . . . . . . . . . . . . . 64
Appendix F. Open Issues . . . . . . . . . . . . . . . . . . . . 46 A.2.7. S/MIME signed-only signedData over a complex message,
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 47 Injected Headers . . . . . . . . . . . . . . . . . . 67
A.2.8. S/MIME signed-only multipart/signed over a complex
message, Injected Headers . . . . . . . . . . . . . . 70
A.3. Encrypted-and-signed Messages . . . . . . . . . . . . . . 73
A.3.1. S/MIME encrypted and signed over a simple message,
Wrapped Message with hcp_minimal . . . . . . . . . . 73
A.3.2. S/MIME encrypted and signed over a simple message,
Injected Headers with hcp_minimal . . . . . . . . . . 76
A.3.3. S/MIME encrypted and signed over a simple message,
Injected Headers with hcp_minimal (+ Legacy Display) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
A.3.4. S/MIME encrypted and signed over a simple message,
Wrapped Message with hcp_strong . . . . . . . . . . . 82
A.3.5. S/MIME encrypted and signed over a simple message,
Injected Headers with hcp_strong . . . . . . . . . . 85
A.3.6. S/MIME encrypted and signed over a simple message,
Injected Headers with hcp_strong (+ Legacy Display) . 88
A.3.7. S/MIME encrypted and signed reply over a simple
message, Wrapped Message with hcp_minimal . . . . . . 91
A.3.8. S/MIME encrypted and signed reply over a simple
message, Injected Headers with hcp_minimal . . . . . 94
A.3.9. S/MIME encrypted and signed reply over a simple
message, Injected Headers with hcp_minimal (+ Legacy
Display) . . . . . . . . . . . . . . . . . . . . . . 97
A.3.10. S/MIME encrypted and signed reply over a simple
message, Wrapped Message with hcp_strong . . . . . . 101
A.3.11. S/MIME encrypted and signed reply over a simple
message, Injected Headers with hcp_strong . . . . . . 104
A.3.12. S/MIME encrypted and signed reply over a simple
message, Injected Headers with hcp_strong (+ Legacy
Display) . . . . . . . . . . . . . . . . . . . . . . 107
A.3.13. S/MIME encrypted and signed over a complex message,
Wrapped Message with hcp_minimal . . . . . . . . . . 110
A.3.14. S/MIME encrypted and signed over a complex message,
Injected Headers with hcp_minimal . . . . . . . . . . 114
A.3.15. S/MIME encrypted and signed over a complex message,
Injected Headers with hcp_minimal (+ Legacy Display) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118
A.3.16. S/MIME encrypted and signed over a complex message,
Wrapped Message with hcp_strong . . . . . . . . . . . 122
A.3.17. S/MIME encrypted and signed over a complex message,
Injected Headers with hcp_strong . . . . . . . . . . 125
A.3.18. S/MIME encrypted and signed over a complex message,
Injected Headers with hcp_strong (+ Legacy Display) . 129
A.3.19. S/MIME encrypted and signed reply over a complex
message, Wrapped Message with hcp_minimal . . . . . . 133
A.3.20. S/MIME encrypted and signed reply over a complex
message, Injected Headers with hcp_minimal . . . . . 137
A.3.21. S/MIME encrypted and signed reply over a complex
message, Injected Headers with hcp_minimal (+ Legacy
Display) . . . . . . . . . . . . . . . . . . . . . . 141
A.3.22. S/MIME encrypted and signed reply over a complex
message, Wrapped Message with hcp_strong . . . . . . 145
A.3.23. S/MIME encrypted and signed reply over a complex
message, Injected Headers with hcp_strong . . . . . . 149
A.3.24. S/MIME encrypted and signed reply over a complex
message, Injected Headers with hcp_strong (+ Legacy
Display) . . . . . . . . . . . . . . . . . . . . . . 153
Appendix B. Additional information . . . . . . . . . . . . . . . 157
B.1. Stored Variants of Messages with Bcc . . . . . . . . . . 157
Appendix C. Text Moved from Above . . . . . . . . . . . . . . . 158
C.1. MIME Format . . . . . . . . . . . . . . . . . . . . . . . 158
C.1.1. S/MIME Specification . . . . . . . . . . . . . . . . 159
C.1.2. Sending Side . . . . . . . . . . . . . . . . . . . . 161
Appendix D. Document Considerations . . . . . . . . . . . . . . 165
Appendix E. Document Changelog . . . . . . . . . . . . . . . . . 166
Appendix F. Open Issues . . . . . . . . . . . . . . . . . . . . 167
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 168
1. Introduction 1. Introduction
Privacy and security issues regarding email Header Protection in S/ Privacy and security issues regarding email Header Protection in S/
MIME have been identified for some time. Most current MIME have been identified for some time. Most current
implementations of cryptographically-protected electronic mail implementations of cryptographically-protected electronic mail
protect only the body of the message, which leaves significant room protect only the body of the message, which leaves significant room
for attacks against otherwise-protected messages. For example, lack for attacks against otherwise-protected messages. For example, lack
of header protection allows an attacker to substitute the message of header protection allows an attacker to substitute the message
subject and/or author. subject and/or author.
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issues: issues:
* Broken or incomplete implementations * Broken or incomplete implementations
* Lack of a simple means to distinguish "forwarded message" and * Lack of a simple means to distinguish "forwarded message" and
"wrapped message" (for the sake of Header Protection) "wrapped message" (for the sake of Header Protection)
* Not enough guidance with respect to handling of Header Fields on * Not enough guidance with respect to handling of Header Fields on
both the sending and the receiving side both the sending and the receiving side
1.3. Motivation 1.3. Problems with Injected Headers
A legacy MUA dealing with an encrypted message that has some header
fields obscured using the Injected Headers scheme will not render the
obscured header fields to the user at all. A workaround "legacy
display" mechanism is provided in this document, which some legacy
MUAs will render to the user, albeit not in the same location that
the header fields would normally be rendered. However, some legacy
MUAs also fail to render the "legacy display" part, leaving the
obscured header fields hidden from users of those MUAs.
1.4. Motivation
Furthermore, the need (technical) Data Minimization, which includes Furthermore, the need (technical) Data Minimization, which includes
data sparseness and hiding all technically concealable information, data sparseness and hiding all technically concealable information,
has grown in importance over the past several years. In addition, has grown in importance over the past several years. In addition,
backwards compatibility must be considered when it is possible to do backwards compatibility must be considered when it is possible to do
so without compromising privacy and security. so without compromising privacy and security.
No mechanism for Header Protection has been standardized for PGP/MIME No mechanism for Header Protection has been standardized for PGP/MIME
(Pretty Good Privacy) [RFC3156] yet. PGP/MIME developers have (Pretty Good Privacy) [RFC3156] yet. PGP/MIME developers have
implemented ad-hoc header-protection, and would like to see a implemented ad-hoc header-protection, and would like to see a
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(Section 4) with guidance on MIME format, sender and receiver (Section 4) with guidance on MIME format, sender and receiver
processing . processing .
[I-D.ietf-lamps-header-protection-requirements] defines the [I-D.ietf-lamps-header-protection-requirements] defines the
requirements that this specification is based on. requirements that this specification is based on.
This document is in an early draft state and contains a proposal on This document is in an early draft state and contains a proposal on
which to base future discussions of this topic. In any case, the which to base future discussions of this topic. In any case, the
final mechanism is to be determined by the IETF LAMPS WG. final mechanism is to be determined by the IETF LAMPS WG.
1.4. Other Protocols to Protect Email Headers 1.5. Other Protocols to Protect Email Headers
A range of protocols for the protection of electronic mail (email) A range of protocols for the protection of electronic mail (email)
exists, which allows one to assess the authenticity and integrity of exists, which allows one to assess the authenticity and integrity of
the email headers section or selected Header Fields from the domain- the email headers section or selected Header Fields from the domain-
level perspective, specifically DomainKeys Identified Mail (DKIM) level perspective, specifically DomainKeys Identified Mail (DKIM)
[RFC6376], as used by Domain-based Message Authentication, Reporting, [RFC6376], as used by Domain-based Message Authentication, Reporting,
and Conformance (DMARC) [RFC7489]. These protocols provide a domain- and Conformance (DMARC) [RFC7489]. These protocols provide a domain-
based reputation mechanism that can be used to mitigate some forms of based reputation mechanism that can be used to mitigate some forms of
unsolicited email (spam). At the same time, these protocols can unsolicited email (spam). At the same time, these protocols can
provide a level of cryptographic integrity and authenticity for some provide a level of cryptographic integrity and authenticity for some
headers, depending on how they are used. However, integrity headers, depending on how they are used. However, integrity
protection and proof of authenticity are both tied to the domain name protection and proof of authenticity are both tied to the domain name
of the sending e-mail address, not the sending address itself, so of the sending e-mail address, not the sending address itself, so
these protocols do not provide end-to-end protection, and are these protocols do not provide end-to-end protection, and are
incapable of providing any form of confidentiality. incapable of providing any form of confidentiality.
1.5. Requirements Language 1.6. Requirements Language
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
"SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
document are to be interpreted as described in [RFC2119]. document are to be interpreted as described in [RFC2119].
1.6. Terms 1.7. Terms
The following terms are defined for the scope of this document: The following terms are defined for the scope of this document:
* Man-in-the-middle (MITM) attack: cf. [RFC4949], which states: "A * Man-in-the-middle (MITM) attack: cf. [RFC4949], which states: "A
form of active wiretapping attack in which the attacker intercepts form of active wiretapping attack in which the attacker intercepts
and selectively modifies communicated data to masquerade as one or and selectively modifies communicated data to masquerade as one or
more of the entities involved in a communication association." more of the entities involved in a communication association."
Note: Historically, MITM has stood for '_Man_-in-the-middle'. Note: Historically, MITM has stood for '_Man_-in-the-middle'.
However, to indicate that the entity in the middle is not always a However, to indicate that the entity in the middle is not always a
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implementations may determine the destination recipients by implementations may determine the destination recipients by
reading the To, Cc and Bcc Header Fields of the Outer Message. reading the To, Cc and Bcc Header Fields of the Outer Message.
* Original Message (OrigM): The Message to be protected before any * Original Message (OrigM): The Message to be protected before any
protection-related processing has been applied on the sending protection-related processing has been applied on the sending
side. If the source is not a "message/rfc822" Message, OrigM is side. If the source is not a "message/rfc822" Message, OrigM is
defined as the "virtual" Message that would be constructed for defined as the "virtual" Message that would be constructed for
sending it as unprotected email. sending it as unprotected email.
* Inner Message (InnerM): The Message to be protected which has had * Inner Message (InnerM): The Message to be protected which has had
wrapping and protection measures aapplied on the sending side OR wrapping and protection measures applied on the sending side OR
the resulting Message once decryption and unwrapping on the the resulting Message once decryption and unwrapping on the
receiving side has been performed. Typically, the Inner Message receiving side has been performed. Typically, the Inner Message
is in clear text. The Inner Message is a subset of (or the same is in clear text. The Inner Message is a subset of (or the same
as) the Original Message. The Inner Message must be the same on as) the Original Message. The Inner Message must be the same on
the sending and the receiving side. the sending and the receiving side.
* Outer Message (OuterM): The Message as provided to the Submission * Outer Message (OuterM): The Message as provided to the Submission
Entity or received from the last hop respectively. The Outer Entity or received from the last hop respectively. The Outer
Message normally differs on the sending and the receiving side Message normally differs on the sending and the receiving side
(e.g. new Header Fields are added by intermediary nodes). (e.g. new Header Fields are added by intermediary nodes).
skipping to change at page 32, line 41 skipping to change at page 33, line 41
8. IANA Considerations 8. IANA Considerations
This document requests no action from IANA. This document requests no action from IANA.
[[ RFC Editor: This section may be removed before publication. ]] [[ RFC Editor: This section may be removed before publication. ]]
9. Acknowledgments 9. Acknowledgments
The authors would like to thank the following people who have The authors would like to thank the following people who have
provided helpful comments and suggestions for this document: Berna provided helpful comments and suggestions for this document: Berna
Alp, Claudio Luck, David Wilson, Hernani Marques, juga, Krista Alp, Bernhard E. Reiter, Claudio Luck, David Wilson, Hernani
Bennett, Kelly Bristol, Lars Rohwedder, Robert Williams, Russ Marques, juga, Krista Bennett, Kelly Bristol, Lars Rohwedder, Robert
Housley, Sofia Balicka, Steve Kille, Volker Birk, and Wei Chuang. Williams, Russ Housley, Sofia Balicka, Steve Kille, Volker Birk, and
Wei Chuang.
10. References 10. References
10.1. Normative References 10.1. Normative References
[I-D.dkg-lamps-e2e-mail-guidance] [I-D.dkg-lamps-e2e-mail-guidance]
Gillmor, D. K., "Guidance on End-to-End E-mail Security", Gillmor, D. K., "Guidance on End-to-End E-mail Security",
Work in Progress, Internet-Draft, draft-dkg-lamps-e2e- Work in Progress, Internet-Draft, draft-dkg-lamps-e2e-
mail-guidance-01, 22 February 2021, mail-guidance-01, 22 February 2021,
<https://www.ietf.org/archive/id/draft-dkg-lamps-e2e-mail- <https://www.ietf.org/archive/id/draft-dkg-lamps-e2e-mail-
skipping to change at page 34, line 12 skipping to change at page 35, line 12
10.2. Informative References 10.2. Informative References
[I-D.autocrypt-lamps-protected-headers] [I-D.autocrypt-lamps-protected-headers]
Einarsson, B. R., juga, and D. K. Gillmor, "Protected Einarsson, B. R., juga, and D. K. Gillmor, "Protected
Headers for Cryptographic E-mail", Work in Progress, Headers for Cryptographic E-mail", Work in Progress,
Internet-Draft, draft-autocrypt-lamps-protected-headers- Internet-Draft, draft-autocrypt-lamps-protected-headers-
02, 20 December 2019, <https://www.ietf.org/archive/id/ 02, 20 December 2019, <https://www.ietf.org/archive/id/
draft-autocrypt-lamps-protected-headers-02.txt>. draft-autocrypt-lamps-protected-headers-02.txt>.
[I-D.dkg-lamps-samples] [I-D.ietf-lamps-samples]
Gillmor, D. K., "S/MIME Example Keys and Certificates", Gillmor, D. K., "S/MIME Example Keys and Certificates",
Work in Progress, Internet-Draft, draft-dkg-lamps-samples- Work in Progress, Internet-Draft, draft-ietf-lamps-
05, 18 February 2021, <https://www.ietf.org/archive/id/ samples-04, 18 May 2021, <https://www.ietf.org/archive/id/
draft-dkg-lamps-samples-05.txt>. draft-ietf-lamps-samples-04.txt>.
[I-D.melnikov-iana-reg-forwarded] [I-D.melnikov-iana-reg-forwarded]
Melnikov, A. and B. Hoeneisen, "IANA Registration of Melnikov, A. and B. Hoeneisen, "IANA Registration of
Content-Type Header Field Parameter 'forwarded'", Work in Content-Type Header Field Parameter 'forwarded'", Work in
Progress, Internet-Draft, draft-melnikov-iana-reg- Progress, Internet-Draft, draft-melnikov-iana-reg-
forwarded-00, 4 November 2019, forwarded-00, 4 November 2019,
<https://www.ietf.org/archive/id/draft-melnikov-iana-reg- <https://www.ietf.org/archive/id/draft-melnikov-iana-reg-
forwarded-00.txt>. forwarded-00.txt>.
[I-D.pep-email] [I-D.pep-email]
skipping to change at page 35, line 17 skipping to change at page 36, line 17
2012, <https://www.rfc-editor.org/info/rfc6532>. 2012, <https://www.rfc-editor.org/info/rfc6532>.
[RFC7489] Kucherawy, M., Ed. and E. Zwicky, Ed., "Domain-based [RFC7489] Kucherawy, M., Ed. and E. Zwicky, Ed., "Domain-based
Message Authentication, Reporting, and Conformance Message Authentication, Reporting, and Conformance
(DMARC)", RFC 7489, DOI 10.17487/RFC7489, March 2015, (DMARC)", RFC 7489, DOI 10.17487/RFC7489, March 2015,
<https://www.rfc-editor.org/info/rfc7489>. <https://www.rfc-editor.org/info/rfc7489>.
Appendix A. Test Vectors Appendix A. Test Vectors
This section contains sample messages using the different schemes This section contains sample messages using the different schemes
described in this document. Each sample contains a MIME object, and described in this document. Each sample contains a MIME object, a
examples of how an MUA might render it. textual and diagrammatic view of its structure, and examples of how
an MUA might render it.
The cryptographic protections used in this document use the S/MIME The cryptographic protections used in this document use the S/MIME
standard, and keying material and certificates come from standard, and keying material and certificates come from
[I-D.dkg-lamps-samples]. [I-D.ietf-lamps-samples].
For the signed-and-encrypted messages, only the "Subject" header is These messages should be accessible to any IMAP client at
obscured. "imap://bob@header-protection.cmrg.net/" (any password should
authenticate to this read-only IMAP mailbox).
A.1. Wrapped Message examples You can also download copies of these test vectors separately at
"https://header-protection.cmrg.net".
The examples in this subsection use the "Wrapped Message" header If any of the messages downloaded differ from those offered here,
this document is the canonical source.
A.1. Baseline Messages
These messages offer no header protection at all, and can be used as
a baseline. They are provided in this document as a counterexample.
An MUA implementer can use these messages to verify that the reported
cryptographic summary of the message indicates no header protection.
A.1.1. No cryptographic protections over a simple message
This message uses no cryptographic protection at all. Its body is a
text/plain message.
It has the following structure:
└─╴text/plain 152 bytes
Its contents are:
MIME-Version: 1.0
Content-Type: text/plain; charset="utf-8"
Content-Transfer-Encoding: 7bit
Subject: no-crypto
Message-ID: <no-crypto@lhp.example>
From: Alice <alice@smime.example>
To: Bob <bob@smime.example>
Date: Sat, 20 Feb 2021 10:00:02 -0500
This is the no-crypto message.
This message uses no cryptographic protection at all. Its body is a
text/plain message.
--
Alice
alice@smime.example
A.1.2. S/MIME signed-only signedData over a simple message, No Header
Protection
This is a signed-only S/MIME message via PKCS#7 signedData. The
payload is a text/plain message. It uses no header protection.
It has the following structure:
└─╴application/pkcs7-mime [smime.p7m] 3852 bytes
⇩ (unwraps to)
└─╴text/plain 204 bytes
Its contents are:
Content-Transfer-Encoding: base64
Content-Type: application/pkcs7-mime; name="smime.p7m";
smime-type="signed-data"
Subject: smime-one-part
Message-ID: <smime-one-part@lhp.example>
From: Alice <alice@smime.example>
To: Bob <bob@smime.example>
Date: Sat, 20 Feb 2021 10:01:02 -0500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A.1.3. S/MIME signed-only multipart/signed over a simple message, No
Header Protection
This is a signed-only S/MIME message via PKCS#7 detached signature
(multipart/signed). The payload is a text/plain message. It uses no
header protection.
It has the following structure:
└┬╴multipart/signed 4156 bytes
├─╴text/plain 224 bytes
└─╴application/pkcs7-signature [smime.p7s] 3429 bytes
Its contents are:
MIME-Version: 1.0
Content-Type: multipart/signed;
protocol="application/pkcs7-signature"; boundary="76c";
micalg="sha-256"
Subject: smime-multipart
Message-ID: <smime-multipart@lhp.example>
From: Alice <alice@smime.example>
To: Bob <bob@smime.example>
Date: Sat, 20 Feb 2021 10:02:02 -0500
--76c
MIME-Version: 1.0
Content-Type: text/plain; charset="utf-8"
Content-Transfer-Encoding: 7bit
This is the smime-multipart message.
This is a signed-only S/MIME message via PKCS#7 detached signature
(multipart/signed). The payload is a text/plain message. It uses no
header protection.
--
Alice
alice@smime.example
--76c
Content-Transfer-Encoding: base64
Content-Type: application/pkcs7-signature; name="smime.p7s"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jH2x9SG91PEM046gfPnc9gMGHjMTg1qvaKcLQP5UzpEYPLror2X4P5uXxaP0LIZR
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A0enITGXnoEkAFvvjiCqh64P1hIeMorj36pgL19oWZD6YrzSWHUz1F00juyuOfQs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BgNVHSAEEDAOMAwGCmCGSAFlAwIBMAEwHgYDVR0RBBcwFYETYWxpY2VAc21pbWUu
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xqM6SqPMQ+G7wIF6P2jHCId8Xyl7sdbL0i6PjotesHU+7nQsCjgI/iVR/ubWUdFX
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3Y+NeucYCT0bXCBq2RLVQSpdNZfScXKL9QvZ3FtB0r6Bmtky
--76c--
A.1.4. S/MIME encrypted and signed over a simple message, No Header
Protection
This is a encrypted and signed S/MIME message using PKCS#7
envelopedData around signedData. The payload is a text/plain
message. It uses no header protection.
It has the following structure:
└─╴application/pkcs7-mime [smime.p7m] 6720 bytes
↧ (decrypts to)
└─╴application/pkcs7-mime [smime.p7m] 3960 bytes
⇩ (unwraps to)
└─╴text/plain 239 bytes
Its contents are:
Content-Transfer-Encoding: base64
Content-Type: application/pkcs7-mime; name="smime.p7m";
smime-type="enveloped-data"
Subject: smime-enc-signed
Message-ID: <smime-enc-signed@lhp.example>
From: Alice <alice@smime.example>
To: Bob <bob@smime.example>
Date: Sat, 20 Feb 2021 10:03:02 -0500
MIITXAYJKoZIhvcNAQcDoIITTTCCE0kCAQAxggMQMIIBhAIBADBsMFUxDTALBgNV
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sAa1LzD78Dg4FKO8t3d13Q==
A.1.5. No cryptographic protections over a complex message
This message uses no cryptographic protection at all. Its body is a
multipart/alternative message with an inline image/png attachment.
It has the following structure:
└┬╴multipart/mixed 1357 bytes
├┬╴multipart/alternative 780 bytes
│├─╴text/plain 206 bytes
│└─╴text/html 290 bytes
└─╴image/png inline 232 bytes
Its contents are:
MIME-Version: 1.0
Content-Type: multipart/mixed; boundary="0f4"
Subject: no-crypto-complex
Message-ID: <no-crypto-complex@lhp.example>
From: Alice <alice@smime.example>
To: Bob <bob@smime.example>
Date: Sat, 20 Feb 2021 12:00:02 -0500
--0f4
MIME-Version: 1.0
Content-Type: multipart/alternative; boundary="384"
--384
Content-Type: text/plain; charset="us-ascii"
MIME-Version: 1.0
Content-Transfer-Encoding: 7bit
This is the no-crypto-complex message.
This message uses no cryptographic protection at all. Its body is a
multipart/alternative message with an inline image/png attachment.
--
Alice
alice@smime.example
--384
Content-Type: text/html; charset="us-ascii"
MIME-Version: 1.0
Content-Transfer-Encoding: 7bit
<html><head><title></title></head><body>
<p>This is the <b>no-crypto-complex</b> message.</p>
<p>This message uses no cryptographic protection at all. Its body is a
multipart/alternative message with an inline image/png attachment.</p>
<p><tt>-- <br/>Alice<br/>alice@smime.example</tt></p>
--384--
--0f4
Content-Type: image/png
Content-Transfer-Encoding: base64
Content-Disposition: inline
iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAAcElEQVR42uVTOxbA
MAgS739nO3TpRw20dqpbfARQEjOywiwYnCtkDKnbcLk66sqlT+zt9cidkE+6KwkZ
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vdPf1QZ2kDD9xppd8wAAAABJRU5ErkJggg==
--0f4--
A.1.6. S/MIME signed-only signedData over a complex message, No Header
Protection
This is a signed-only S/MIME message via PKCS#7 signedData. The
payload is a multipart/alternative message with an inline image/png
attachment. It uses no header protection.
It has the following structure:
└─╴application/pkcs7-mime [smime.p7m] 5229 bytes
⇩ (unwraps to)
└┬╴multipart/mixed 1274 bytes
├┬╴multipart/alternative 868 bytes
│├─╴text/plain 258 bytes
│└─╴text/html 339 bytes
└─╴image/png inline 236 bytes
Its contents are:
Content-Transfer-Encoding: base64
Content-Type: application/pkcs7-mime; name="smime.p7m";
smime-type="signed-data"
Subject: smime-one-part-complex
Message-ID: <smime-one-part-complex@lhp.example>
From: Alice <alice@smime.example>
To: Bob <bob@smime.example>
Date: Sat, 20 Feb 2021 12:01:02 -0500
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zZLoOAJF5m5O0xzXPL74zFCWp2f1ZkuE4A6l41koaZXCN5XL7wWTLMLeNf9Byb5k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A.1.7. S/MIME signed-only multipart/signed over a complex message, No
Header Protection
This is a signed-only S/MIME message via PKCS#7 detached signature
(multipart/signed). The payload is a multipart/alternative message
with an inline image/png attachment. It uses no header protection.
It has the following structure:
└┬╴multipart/signed 5185 bytes
├┬╴multipart/mixed 1330 bytes
│├┬╴multipart/alternative 924 bytes
││├─╴text/plain 278 bytes
││└─╴text/html 362 bytes
│└─╴image/png inline 232 bytes
└─╴application/pkcs7-signature [smime.p7s] 3429 bytes
Its contents are:
MIME-Version: 1.0
Content-Type: multipart/signed;
protocol="application/pkcs7-signature"; boundary="d66";
micalg="sha-256"
Subject: smime-multipart-complex
Message-ID: <smime-multipart-complex@lhp.example>
From: Alice <alice@smime.example>
To: Bob <bob@smime.example>
Date: Sat, 20 Feb 2021 12:02:02 -0500
--d66
MIME-Version: 1.0
Content-Type: multipart/mixed; boundary="7fe"
--7fe
MIME-Version: 1.0
Content-Type: multipart/alternative; boundary="848"
--848
Content-Type: text/plain; charset="us-ascii"
MIME-Version: 1.0
Content-Transfer-Encoding: 7bit
This is the smime-multipart-complex message.
This is a signed-only S/MIME message via PKCS#7 detached signature
(multipart/signed). The payload is a multipart/alternative message
with an inline image/png attachment. It uses no header protection.
--
Alice
alice@smime.example
--848
Content-Type: text/html; charset="us-ascii"
MIME-Version: 1.0
Content-Transfer-Encoding: 7bit
<html><head><title></title></head><body>
<p>This is the <b>smime-multipart-complex</b> message.</p>
<p>This is a signed-only S/MIME message via PKCS#7 detached signature
(multipart/signed). The payload is a multipart/alternative message
with an inline image/png attachment. It uses no header protection.</p>
<p><tt>-- <br/>Alice<br/>alice@smime.example</tt></p>
--848--
--7fe
Content-Type: image/png
Content-Transfer-Encoding: base64
Content-Disposition: inline
iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAAcElEQVR42uVTOxbA
MAgS739nO3TpRw20dqpbfARQEjOywiwYnCtkDKnbcLk66sqlT+zt9cidkE+6KwkZ
sgrzfcqVMpL2jo0447gYDpeArk+OnJHkIhAfTPRicihAf5YJrw7vjv0ZWRWM/uli
vdPf1QZ2kDD9xppd8wAAAABJRU5ErkJggg==
--7fe--
--d66
Content-Transfer-Encoding: base64
Content-Type: application/pkcs7-signature; name="smime.p7s"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--d66--
A.1.8. S/MIME encrypted and signed over a complex message, No Header
Protection
This is a encrypted and signed S/MIME message using PKCS#7
envelopedData around signedData. The payload is a multipart/
alternative message with an inline image/png attachment. It uses no
header protection.
It has the following structure:
└─╴application/pkcs7-mime [smime.p7m] 8670 bytes
↧ (decrypts to)
└─╴application/pkcs7-mime [smime.p7m] 5408 bytes
⇩ (unwraps to)
└┬╴multipart/mixed 1342 bytes
├┬╴multipart/alternative 936 bytes
│├─╴text/plain 293 bytes
│└─╴text/html 374 bytes
└─╴image/png inline 236 bytes
Its contents are:
Content-Transfer-Encoding: base64
Content-Type: application/pkcs7-mime; name="smime.p7m";
smime-type="enveloped-data"
Subject: smime-enc-signed-complex
Message-ID: <smime-enc-signed-complex@lhp.example>
From: Alice <alice@smime.example>
To: Bob <bob@smime.example>
Date: Sat, 20 Feb 2021 12:03:02 -0500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gsBBxGC3GwCWWfnJH4kpa67Ta1NLifl03nBkTKakYEGsNRk6BvffDHiQzB1dJg25
NKp4YLNTAWPLW2OP77KAvc2NQooQgP2bSaaNSuEf7OPnfhb/p2rLvLeMD5o6aSbp
WGFcMaIhjqmNAtp1BPBANEyDgiTdIFP8mMDklvqRIFh2lJNRN3bCQqfYxH9dCfaP
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wuKvVdMDRMf9BPMY9QgoK0BfpmovhMuqDClzn9503Rdv/Um1NErlPj9fNgtEZg17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A.2. Signed-only Messages
These messages are signed-only, using different schemes of header
protection and different S/MIME structure. The use no Header
Confidentiality Policy because the hcp is only relevant when a
message is encrypted.
A.2.1. S/MIME signed-only signedData over a simple message, Wrapped
Message
This is a signed-only S/MIME message via PKCS#7 signedData. The
payload is a text/plain message. It uses the Wrapped Message header
protection scheme. protection scheme.
A.1.1. Wrapped Message: signed-only, with PKCS7 signedData It has the following structure:
[[ TODO ]] └─╴application/pkcs7-mime [smime.p7m] 4213 bytes
⇩ (unwraps to)
└┬╴message/rfc822 566 bytes
└─╴text/plain 228 bytes
A.1.2. Wrapped Message: signed-only, using multipart/signed Its contents are:
[[ TODO ]] Content-Transfer-Encoding: base64
Content-Type: application/pkcs7-mime; name="smime.p7m";
smime-type="signed-data"
Subject: smime-one-part-wrapped
Message-ID: <smime-one-part-wrapped@lhp.example>
From: Alice <alice@smime.example>
To: Bob <bob@smime.example>
Date: Sat, 20 Feb 2021 10:04:02 -0500
A.1.3. Wrapped Message: signed-and-encrypted MIIMIwYJKoZIhvcNAQcCoIIMFDCCDBACAQExDTALBglghkgBZQMEAgEwggJMBgkq
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hkiG9w0BCQMxCwYJKoZIhvcNAQcBMBwGCSqGSIb3DQEJBTEPFw0yMTAyMjAxNTA0
MDJaMC8GCSqGSIb3DQEJBDEiBCCt+Ik56mZTd2mpSgOXM38dS7jM5alU2FDX9/58
cga1szANBgkqhkiG9w0BAQEFAASCAQCxKLkx5li14OIOcH2tcWqcsQilPLgQ30ck
qhJL2X9/Cl22ibOGNwL8w3qSEBeG1a+WtHw3bSqJx1ciRYcLs16ms23no5QoZ0pU
fRLmQuTEgObCf+syiTGnWLj8e+2aRVP1L9yEIbin6+hFyp4s393zYhdMOPAP2ruI
lg+BxoWXUjXso+8lPgqLawA+9KMI6tQZMnwI9LpGJmZfoSXdHWqWtjdotzZpqsKm
Ihr8DBKtUetqgZ2zqDO3zo3W2L6EmNM05BJUmqwAt/cN+X9kws5dAqtHDQhPNTa1
WUX0oTTkMzn1RAlOxfowEStSnfDOOzIqg+L7LgiMw9jhIgP4/uB2
[[ TODO ]] A.2.2. S/MIME signed-only multipart/signed over a simple message,
Wrapped Message
A.2. Injected Headers examples This is a signed-only S/MIME message via PKCS#7 detached signature
(multipart/signed). The payload is a text/plain message. It uses
the Wrapped Message header protection scheme.
The examples in this subsection use the "Injected Headers" header It has the following structure:
└┬╴multipart/signed 4451 bytes
├┬╴message/rfc822 596 bytes
│└─╴text/plain 256 bytes
└─╴application/pkcs7-signature [smime.p7s] 3429 bytes
Its contents are:
MIME-Version: 1.0
Content-Type: multipart/signed;
protocol="application/pkcs7-signature"; boundary="20c";
micalg="sha-256"
Subject: smime-multipart-wrapped
Message-ID: <smime-multipart-wrapped@lhp.example>
From: Alice <alice@smime.example>
To: Bob <bob@smime.example>
Date: Sat, 20 Feb 2021 10:05:02 -0500
--20c
MIME-Version: 1.0
Content-Type: message/rfc822; forwarded="no"
MIME-Version: 1.0
Content-Type: text/plain; charset="utf-8"
Content-Transfer-Encoding: 7bit
Subject: smime-multipart-wrapped
Message-ID: <smime-multipart-wrapped@lhp.example>
From: Alice <alice@smime.example>
To: Bob <bob@smime.example>
Date: Sat, 20 Feb 2021 10:05:02 -0500
This is the smime-multipart-wrapped message.
This is a signed-only S/MIME message via PKCS#7 detached signature
(multipart/signed). The payload is a text/plain message. It uses the
Wrapped Message header protection scheme.
--
Alice
alice@smime.example
--20c
Content-Transfer-Encoding: base64
Content-Type: application/pkcs7-signature; name="smime.p7s"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8QkoZTYaZxxodvRZMA0GCSqGSIb3DQEBDQUAA4IBAQBziaI2p86poGkjd/4KkkOH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--20c--
A.2.3. S/MIME signed-only signedData over a simple message, Injected
Headers
This is a signed-only S/MIME message via PKCS#7 signedData. The
payload is a text/plain message. It uses the Injected Headers header
protection scheme. protection scheme.
A.2.1. Injected Headers: signed-only, with PKCS7 signedData It has the following structure:
[[ TODO ]] └─╴application/pkcs7-mime [smime.p7m] 4185 bytes
⇩ (unwraps to)
└─╴text/plain 239 bytes
A.2.2. Injected Headers: signed-only, using multipart/signed Its contents are:
[[ TODO ]] Content-Transfer-Encoding: base64
Content-Type: application/pkcs7-mime; name="smime.p7m";
smime-type="signed-data"
Subject: smime-one-part-injected
Message-ID: <smime-one-part-injected@lhp.example>
From: Alice <alice@smime.example>
To: Bob <bob@smime.example>
Date: Sat, 20 Feb 2021 10:06:02 -0500
A.2.3. Injected Headers: signed-and-encrypted with Legacy Display part MIIMDgYJKoZIhvcNAQcCoIIL/zCCC/sCAQExDTALBglghkgBZQMEAgEwggI3Bgkq
hkiG9w0BBwGgggIoBIICJE1JTUUtVmVyc2lvbjogMS4wDQpDb250ZW50LVRyYW5z
ZmVyLUVuY29kaW5nOiA3Yml0DQpTdWJqZWN0OiBzbWltZS1vbmUtcGFydC1pbmpl
Y3RlZA0KTWVzc2FnZS1JRDogPHNtaW1lLW9uZS1wYXJ0LWluamVjdGVkQGxocC5l
eGFtcGxlPg0KRnJvbTogQWxpY2UgPGFsaWNlQHNtaW1lLmV4YW1wbGU+DQpUbzog
Qm9iIDxib2JAc21pbWUuZXhhbXBsZT4NCkRhdGU6IFNhdCwgMjAgRmViIDIwMjEg
MTA6MDY6MDIgLTA1MDANCkNvbnRlbnQtVHlwZTogdGV4dC9wbGFpbjsgY2hhcnNl
dD0idXRmLTgiOyBwcm90ZWN0ZWQtaGVhZGVycz0idjEiDQoNClRoaXMgaXMgdGhl
IHNtaW1lLW9uZS1wYXJ0LWluamVjdGVkIG1lc3NhZ2UuDQoNClRoaXMgaXMgYSBz
aWduZWQtb25seSBTL01JTUUgbWVzc2FnZSB2aWEgUEtDUyM3IHNpZ25lZERhdGEu
ICBUaGUNCnBheWxvYWQgaXMgYSB0ZXh0L3BsYWluIG1lc3NhZ2UuIEl0IHVzZXMg
dGhlIEluamVjdGVkIEhlYWRlcnMgaGVhZGVyDQpwcm90ZWN0aW9uIHNjaGVtZS4N
Cg0KLS0gDQpBbGljZQ0KYWxpY2VAc21pbWUuZXhhbXBsZQ0KoIIHpjCCA88wggK3
oAMCAQICEw8tJb0ROZdKzkJUh6HuPTQGirQwDQYJKoZIhvcNAQENBQAwVTENMAsG
A1UEChMESUVURjERMA8GA1UECxMITEFNUFMgV0cxMTAvBgNVBAMTKFNhbXBsZSBM
QU1QUyBSU0EgQ2VydGlmaWNhdGlvbiBBdXRob3JpdHkwIBcNMTkxMTIwMDY1NDE4
WhgPMjA1MjA5MjcwNjU0MThaMDsxDTALBgNVBAoTBElFVEYxETAPBgNVBAsTCExB
TVBTIFdHMRcwFQYDVQQDEw5BbGljZSBMb3ZlbGFjZTCCASIwDQYJKoZIhvcNAQEB
BQADggEPADCCAQoCggEBAJqVKfqLwaLjj+gBUCfkacKTg8cc2OtJ9ZSed6U3jUoi
ZVpMLcP3MUKtLeLg9r1mAfIDlB/wlbdmadXPmrszyidmbuZmOpB5voVQfiLYYy3i
Ox7YOqzXrl6udP07k0sV+UdSNRFxrfKeoQEFXgOaGdmnx4OG/e3p1fIKM0dPzZLo
OAJF5m5O0xzXPL74zFCWp2f1ZkuE4A6l41koaZXCN5XL7wWTLMLeNf9Byb5ksKqU
uqEHAMd1nmoNMgjY9VfVfcrv9w43GG8FtpSX+TWzB2zNS2OF+XIVnzRG5DeoULq8
v88Z5bLpIJ/nx26r8A4SSwIBaVv4wPxAf1iPsIVKarUCAwEAAaOBrzCBrDAMBgNV
HRMBAf8EAjAAMBcGA1UdIAQQMA4wDAYKYIZIAWUDAgEwATAeBgNVHREEFzAVgRNh
bGljZUBzbWltZS5leGFtcGxlMBMGA1UdJQQMMAoGCCsGAQUFBwMEMA4GA1UdDwEB
/wQEAwIFIDAdBgNVHQ4EFgQUolNB1UQ8gCkVfAEj8OeOr83zdw8wHwYDVR0jBBgw
FoAUkTCOfAcXDKfxCShlNhpnHGh29FkwDQYJKoZIhvcNAQENBQADggEBAIFJeKCc
sTKcFqQMpTryujRGzJdYA+R9eBAuDLsatbtKtl4FzkgRyOg31/+Cw7H8e30iLrPI
FlWN1qjHrjgOyIs5AQ/hgxLvLir3hEUV2Z3MRsMtjH2x9SG91PEM046gfPnc9gMG
HjMTg1qvaKcLQP5UzpEYPLror2X4P5uXxaP0LIZRzWmkw1RF7FOD7PfB5v94M527
4XYxW2W4uKGd7QGnUZROSvSYkGiWDp1JhqXwfDz8A0enITGXnoEkAFvvjiCqh64P
1hIeMorj36pgL19oWZD6YrzSWHUz1F00juyuOfQsqm6hvrDTqNpHNZ015fOURza1
SkCvi9GFmNUPoVgwggPPMIICt6ADAgECAhM3QQV57XV/QqmiXDr0+GrOmqnXMA0G
CSqGSIb3DQEBDQUAMFUxDTALBgNVBAoTBElFVEYxETAPBgNVBAsTCExBTVBTIFdH
MTEwLwYDVQQDEyhTYW1wbGUgTEFNUFMgUlNBIENlcnRpZmljYXRpb24gQXV0aG9y
aXR5MCAXDTE5MTEyMDA2NTQxOFoYDzIwNTIwOTI3MDY1NDE4WjA7MQ0wCwYDVQQK
EwRJRVRGMREwDwYDVQQLEwhMQU1QUyBXRzEXMBUGA1UEAxMOQWxpY2UgTG92ZWxh
Y2UwggEiMA0GCSqGSIb3DQEBAQUAA4IBDwAwggEKAoIBAQC09InoWDgWPk2af0+S
tijSNOR8K/hN8D+l078oullsk4ASvSwjsCNo7sHUa4xQUl5JO6VqY18LANwORjrc
9BaX4MguzsbFXBe6uFh1mVpXmFxSpUByQ+950MFz/evPgP96wV+z4TtAwW2Z34rT
iz4DxMI07XYNFUEOls/gkUP2GxzymsO2kaYWTut3SryCqeHEFbZFkB4urMk4xrIJ
C3CzWruS2Q0FHbBlfkgKN5wXVgkWFfiOucfCn+IQsaqpo1d3f9jSkbtAV5w3vzfo
g8919MxKI9H6l4KuElnAtJ7BtZcsl7dUy9u9COgEykRiVokFQgqQ7XNDU+r3SeOW
wks7AgMBAAGjga8wgawwDAYDVR0TAQH/BAIwADAXBgNVHSAEEDAOMAwGCmCGSAFl
AwIBMAEwHgYDVR0RBBcwFYETYWxpY2VAc21pbWUuZXhhbXBsZTATBgNVHSUEDDAK
BggrBgEFBQcDBDAOBgNVHQ8BAf8EBAMCBsAwHQYDVR0OBBYEFLv2zLItHQYSHJeu
KWqQENMgZmZzMB8GA1UdIwQYMBaAFJEwjnwHFwyn8QkoZTYaZxxodvRZMA0GCSqG
SIb3DQEBDQUAA4IBAQBziaI2p86poGkjd/4KkkOHG25nY/0eNARD6/oF0/sYonX2
doizcGMk53riugAocCn5zbzhW/JVdYn30UxfyrZlRAzEf7GHqgB/NyjOad3pdpVY
eDh4ciNKjbs+aEoTWgAkoqENt1sRxlcvb7HVX524bKZa1oPTUNlm6QpivtqDIdqG
JdGf8L1zLfXBuo2zL3HR+M9CDr4Opq2JCkzP0Qhp7poIccGE6I9Tsg+RrOA9iCQs
Pn1+Tg8YedjGzUWF07rNmT0TzPCVzUAuBlr+JJtzOKypyQ3eoZ6EPazXqMyHAVcs
m0GI364IOA0b8PSrJNtjh+AqJ5QfH+0e7NSzNnEmMYICADCCAfwCAQEwbDBVMQ0w
CwYDVQQKEwRJRVRGMREwDwYDVQQLEwhMQU1QUyBXRzExMC8GA1UEAxMoU2FtcGxl
IExBTVBTIFJTQSBDZXJ0aWZpY2F0aW9uIEF1dGhvcml0eQITN0EFee11f0Kpolw6
9Phqzpqp1zALBglghkgBZQMEAgGgaTAYBgkqhkiG9w0BCQMxCwYJKoZIhvcNAQcB
MBwGCSqGSIb3DQEJBTEPFw0yMTAyMjAxNTA2MDJaMC8GCSqGSIb3DQEJBDEiBCA7
4grfze+Y7DQEGFAYHyyvRpNkuuZFR0V+RvSTvu4FGDANBgkqhkiG9w0BAQEFAASC
AQB1KYVvQNZpe3EKeM0XhJrlJNxneVmZWFCEl5YFeRsO8FeIwJkV65YtFJKjOVVy
qYuZBGz4MsKaddXxAOXI/Q7cJ+70d9iOc1mL3PD2/U6DOwwhNfJoNSK7miYfMASV
42TMJWTt0T1ORJnvBitjkTuZDus1tp3xwxbrZTa4pyGaXEhBW/Fc4z6L+z8hpQv/
+6dw3+ORgfc67VTHVnsVVfb0UPrWvdxFdL5xYdqXxlhDsLMEms2ttHHzvjC003Kq
As0xMHEmMpfdL5M69MAjvroOUv0SXETfQaxca7IKd+9xUNNRretZ9xz2kn2uD+k7
unTEyVGeHrWmQMw/8MdvEac/
[[ TODO ]] A.2.4. S/MIME signed-only multipart/signed over a simple message,
Injected Headers
A.2.4. Injected Headers: signed-and-encrypted without Legacy Display This is a signed-only S/MIME message via PKCS#7 detached signature
part (multipart/signed). The payload is a text/plain message. It uses
the Injected Headers header protection scheme.
[[ TODO ]] It has the following structure:
A.3. Messages without Header Protection └┬╴multipart/signed 4417 bytes
├─╴text/plain 258 bytes
└─╴application/pkcs7-signature [smime.p7s] 3429 bytes
The examples in this subsection have cryptographic protection, but no Its contents are:
header protection. They are provided in this document as a
counterexample. An MUA implementer can use these messages to verify
that the reported cryptographic summary of the message indicates no
header protection.
A.3.1. Unprotected Headers: signed-only, with PKCS7 signedData MIME-Version: 1.0
Content-Type: multipart/signed;
protocol="application/pkcs7-signature"; boundary="12b";
micalg="sha-256"
Subject: smime-multipart-injected
Message-ID: <smime-multipart-injected@lhp.example>
From: Alice <alice@smime.example>
To: Bob <bob@smime.example>
Date: Sat, 20 Feb 2021 10:07:02 -0500
[[ TODO ]] --12b
MIME-Version: 1.0
Content-Transfer-Encoding: 7bit
Subject: smime-multipart-injected
Message-ID: <smime-multipart-injected@lhp.example>
From: Alice <alice@smime.example>
To: Bob <bob@smime.example>
Date: Sat, 20 Feb 2021 10:07:02 -0500
Content-Type: text/plain; charset="utf-8"; protected-headers="v1"
A.3.2. Unprotected Headers: signed-only, using multipart/signed This is the smime-multipart-injected message.
[[ TODO ]] This is a signed-only S/MIME message via PKCS#7 detached signature
(multipart/signed). The payload is a text/plain message. It uses the
Injected Headers header protection scheme.
A.3.3. Unprotected Headers: signed-and-encrypted --
Alice
alice@smime.example
[[ TODO ]] --12b
Content-Transfer-Encoding: base64
Content-Type: application/pkcs7-signature; name="smime.p7s"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OKypyQ3eoZ6EPazXqMyHAVcsm0GI364IOA0b8PSrJNtjh+AqJ5QfH+0e7NSzNnEm
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cml0eQITN0EFee11f0Kpolw69Phqzpqp1zALBglghkgBZQMEAgGgaTAYBgkqhkiG
9w0BCQMxCwYJKoZIhvcNAQcBMBwGCSqGSIb3DQEJBTEPFw0yMTAyMjAxNTA3MDJa
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xBmmSy5lq5vvs+axKK/hTOR7YLSuLJLNwxJgDCPEmHi1hV5Tpj5mLH8qEXu4c+kK
s9is53v0NvibhIvDEpnqNvL/kMVDAk2gTqYHCE2Ij7qcWWNhnGdweMJZsBvLy/Xi
BLaD2t4qHY9lPaeMugDrxThNWEhjoDIoI5f7NpBPYvJgB7b1cJhXqil5weYrJiGr
hyTr56lff+Xjs8qjgrrzdJ8HHeUsxDJulrX8auo+pIKudcu41U8Ben2M9nCiVbEG
aqbbPK7xip5c/YZEaZWYAs8w+dif68J8Eo7QO/kkr45Tt5pf
--12b--
A.2.5. S/MIME signed-only signedData over a complex message, Wrapped
Message
This is a signed-only S/MIME message via PKCS#7 signedData. The
payload is a multipart/alternative message with an inline image/png
attachment. It uses the Wrapped Message header protection scheme.
It has the following structure:
└─╴application/pkcs7-mime [smime.p7m] 5615 bytes
⇩ (unwraps to)
└┬╴message/rfc822 1599 bytes
└┬╴multipart/mixed 1535 bytes
├┬╴multipart/alternative 932 bytes
│├─╴text/plain 282 bytes
│└─╴text/html 366 bytes
└─╴image/png inline 232 bytes
Its contents are:
Content-Transfer-Encoding: base64
Content-Type: application/pkcs7-mime; name="smime.p7m";
smime-type="signed-data"
Subject: smime-one-part-complex-wrapped
Message-ID: <smime-one-part-complex-wrapped@lhp.example>
From: Alice <alice@smime.example>
To: Bob <bob@smime.example>
Date: Sat, 20 Feb 2021 12:04:02 -0500
MIIQLAYJKoZIhvcNAQcCoIIQHTCCEBkCAQExDTALBglghkgBZQMEAgEwggZVBgkq
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kBDTIGZmczAfBgNVHSMEGDAWgBSRMI58BxcMp/EJKGU2GmccaHb0WTANBgkqhkiG
9w0BAQ0FAAOCAQEAc4miNqfOqaBpI3f+CpJDhxtuZ2P9HjQEQ+v6BdP7GKJ19naI
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eHIjSo27PmhKE1oAJKKhDbdbEcZXL2+x1V+duGymWtaD01DZZukKYr7agyHahiXR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A.2.6. S/MIME signed-only multipart/signed over a complex message,
Wrapped Message
This is a signed-only S/MIME message via PKCS#7 detached signature
(multipart/signed). The payload is a multipart/alternative message
with an inline image/png attachment. It uses the Wrapped Message
header protection scheme.
It has the following structure:
└┬╴multipart/signed 5528 bytes
├┬╴message/rfc822 1657 bytes
│└┬╴multipart/mixed 1593 bytes
│ ├┬╴multipart/alternative 988 bytes
│ │├─╴text/plain 310 bytes
│ │└─╴text/html 394 bytes
│ └─╴image/png inline 232 bytes
└─╴application/pkcs7-signature [smime.p7s] 3429 bytes
Its contents are:
MIME-Version: 1.0
Content-Type: multipart/signed;
protocol="application/pkcs7-signature"; boundary="932";
micalg="sha-256"
Subject: smime-multipart-complex-wrapped
Message-ID: <smime-multipart-complex-wrapped@lhp.example>
From: Alice <alice@smime.example>
To: Bob <bob@smime.example>
Date: Sat, 20 Feb 2021 12:05:02 -0500
--932
MIME-Version: 1.0
Content-Type: message/rfc822; forwarded="no"
MIME-Version: 1.0
Content-Type: multipart/mixed; boundary="c35"
Subject: smime-multipart-complex-wrapped
Message-ID: <smime-multipart-complex-wrapped@lhp.example>
From: Alice <alice@smime.example>
To: Bob <bob@smime.example>
Date: Sat, 20 Feb 2021 12:05:02 -0500
--c35
MIME-Version: 1.0
Content-Type: multipart/alternative; boundary="645"
--645
Content-Type: text/plain; charset="us-ascii"
MIME-Version: 1.0
Content-Transfer-Encoding: 7bit
This is the smime-multipart-complex-wrapped message.
This is a signed-only S/MIME message via PKCS#7 detached signature
(multipart/signed). The payload is a multipart/alternative message
with an inline image/png attachment. It uses the Wrapped Message
header protection scheme.
--
Alice
alice@smime.example
--645
Content-Type: text/html; charset="us-ascii"
MIME-Version: 1.0
Content-Transfer-Encoding: 7bit
<html><head><title></title></head><body>
<p>This is the <b>smime-multipart-complex-wrapped</b> message.</p>
<p>This is a signed-only S/MIME message via PKCS#7 detached signature
(multipart/signed). The payload is a multipart/alternative message
with an inline image/png attachment. It uses the Wrapped Message
header protection scheme.</p>
<p><tt>-- <br/>Alice<br/>alice@smime.example</tt></p>
--645--
--c35
Content-Type: image/png
Content-Transfer-Encoding: base64
Content-Disposition: inline
iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAAcElEQVR42uVTOxbA
MAgS739nO3TpRw20dqpbfARQEjOywiwYnCtkDKnbcLk66sqlT+zt9cidkE+6KwkZ
sgrzfcqVMpL2jo0447gYDpeArk+OnJHkIhAfTPRicihAf5YJrw7vjv0ZWRWM/uli
vdPf1QZ2kDD9xppd8wAAAABJRU5ErkJggg==
--c35--
--932
Content-Transfer-Encoding: base64
Content-Type: application/pkcs7-signature; name="smime.p7s"
MIIJ4AYJKoZIhvcNAQcCoIIJ0TCCCc0CAQExDTALBglghkgBZQMEAgEwCwYJKoZI
hvcNAQcBoIIHpjCCA88wggK3oAMCAQICEw8tJb0ROZdKzkJUh6HuPTQGirQwDQYJ
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BElFVEYxETAPBgNVBAsTCExBTVBTIFdHMRcwFQYDVQQDEw5BbGljZSBMb3ZlbGFj
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CCsGAQUFBwMEMA4GA1UdDwEB/wQEAwIFIDAdBgNVHQ4EFgQUolNB1UQ8gCkVfAEj
8OeOr83zdw8wHwYDVR0jBBgwFoAUkTCOfAcXDKfxCShlNhpnHGh29FkwDQYJKoZI
hvcNAQENBQADggEBAIFJeKCcsTKcFqQMpTryujRGzJdYA+R9eBAuDLsatbtKtl4F
zkgRyOg31/+Cw7H8e30iLrPIFlWN1qjHrjgOyIs5AQ/hgxLvLir3hEUV2Z3MRsMt
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zWmkw1RF7FOD7PfB5v94M5274XYxW2W4uKGd7QGnUZROSvSYkGiWDp1JhqXwfDz8
A0enITGXnoEkAFvvjiCqh64P1hIeMorj36pgL19oWZD6YrzSWHUz1F00juyuOfQs
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MDY1NDE4WjA7MQ0wCwYDVQQKEwRJRVRGMREwDwYDVQQLEwhMQU1QUyBXRzEXMBUG
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saqpo1d3f9jSkbtAV5w3vzfog8919MxKI9H6l4KuElnAtJ7BtZcsl7dUy9u9COgE
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BgNVHSAEEDAOMAwGCmCGSAFlAwIBMAEwHgYDVR0RBBcwFYETYWxpY2VAc21pbWUu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cml0eQITN0EFee11f0Kpolw69Phqzpqp1zALBglghkgBZQMEAgGgaTAYBgkqhkiG
9w0BCQMxCwYJKoZIhvcNAQcBMBwGCSqGSIb3DQEJBTEPFw0yMTAyMjAxNzA1MDJa
MC8GCSqGSIb3DQEJBDEiBCCV9xSB/IVw/tBS3A32iIL4hLUx22Ane+7Zjas34KM6
yzANBgkqhkiG9w0BAQEFAASCAQB7m9+tvuIXlRpTmHv+V9XCZbYbMFSE9YU9DBzA
GYf9GYckf113NWwg75oi7MA/VHSDMhVkd1mBIN/Te+3mcnhda+KkoDIChzPJ3k7N
4baRLQi8S+a+JEQxj8/lUp2Dd0giwO9J8E7uHAzYu9MEAxKRS0Z9F8BudabXg+tr
8K7fQ/0WpjAs4HkSRZaX5eve9U1Qf99+oCyYvRmv+BZhTCbaic/8ZJuN0elYjbB/
IRmiN0dV4O1L4EpNacsFUYLpWqwUsMGrIJ4+b/xwqEUkmLnh41XKh1/OBp1natYs
3PP7EUNBBJebAPyo1ifT3LFR4qsa5QRu20X0JhajvnlQkWs9
--932--
A.2.7. S/MIME signed-only signedData over a complex message, Injected
Headers
This is a signed-only S/MIME message via PKCS#7 signedData. The
payload is a multipart/alternative message with an inline image/png
attachment. It uses the Injected Headers header protection scheme.
It has the following structure:
└─╴application/pkcs7-mime [smime.p7m] 5631 bytes
⇩ (unwraps to)
└┬╴multipart/mixed 1565 bytes
├┬╴multipart/alternative 936 bytes
│├─╴text/plain 292 bytes
│└─╴text/html 373 bytes
└─╴image/png inline 236 bytes
Its contents are:
Content-Transfer-Encoding: base64
Content-Type: application/pkcs7-mime; name="smime.p7m";
smime-type="signed-data"
Subject: smime-one-part-complex-injected
Message-ID: <smime-one-part-complex-injected@lhp.example>
From: Alice <alice@smime.example>
To: Bob <bob@smime.example>
Date: Sat, 20 Feb 2021 12:06:02 -0500
MIIQOQYJKoZIhvcNAQcCoIIQKjCCECYCAQExDTALBglghkgBZQMEAgEwggZiBgkq
hkiG9w0BBwGgggZTBIIGT01JTUUtVmVyc2lvbjogMS4wDQpTdWJqZWN0OiBzbWlt
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b25lLXBhcnQtY29tcGxleC1pbmplY3RlZEBsaHAuZXhhbXBsZT4NCkZyb206IEFs
aWNlIDxhbGljZUBzbWltZS5leGFtcGxlPg0KVG86IEJvYiA8Ym9iQHNtaW1lLmV4
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ci1FbmNvZGluZzogN2JpdA0KDQpUaGlzIGlzIHRoZSBzbWltZS1vbmUtcGFydC1j
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aWNlDQphbGljZUBzbWltZS5leGFtcGxlDQotLTdiZQ0KQ29udGVudC1UeXBlOiB0
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CkNvbnRlbnQtVHJhbnNmZXItRW5jb2Rpbmc6IDdiaXQNCg0KPGh0bWw+PGhlYWQ+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ggemMIIDzzCCAregAwIBAgITDy0lvRE5l0rOQlSHoe49NAaKtDANBgkqhkiG9w0B
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o4GvMIGsMAwGA1UdEwEB/wQCMAAwFwYDVR0gBBAwDjAMBgpghkgBZQMCATABMB4G
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AwQwDgYDVR0PAQH/BAQDAgUgMB0GA1UdDgQWBBSiU0HVRDyAKRV8ASPw546vzfN3
DzAfBgNVHSMEGDAWgBSRMI58BxcMp/EJKGU2GmccaHb0WTANBgkqhkiG9w0BAQ0F
AAOCAQEAgUl4oJyxMpwWpAylOvK6NEbMl1gD5H14EC4Muxq1u0q2XgXOSBHI6DfX
/4LDsfx7fSIus8gWVY3WqMeuOA7IizkBD+GDEu8uKveERRXZncxGwy2MfbH1Ib3U
8QzTjqB8+dz2AwYeMxODWq9opwtA/lTOkRg8uuivZfg/m5fFo/QshlHNaaTDVEXs
U4Ps98Hm/3gznbvhdjFbZbi4oZ3tAadRlE5K9JiQaJYOnUmGpfB8PPwDR6chMZee
gSQAW++OIKqHrg/WEh4yiuPfqmAvX2hZkPpivNJYdTPUXTSO7K459CyqbqG+sNOo
2kc1nTXl85RHNrVKQK+L0YWY1Q+hWDCCA88wggK3oAMCAQICEzdBBXntdX9CqaJc
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CxMITEFNUFMgV0cxMTAvBgNVBAMTKFNhbXBsZSBMQU1QUyBSU0EgQ2VydGlmaWNh
dGlvbiBBdXRob3JpdHkwIBcNMTkxMTIwMDY1NDE4WhgPMjA1MjA5MjcwNjU0MTha
MDsxDTALBgNVBAoTBElFVEYxETAPBgNVBAsTCExBTVBTIFdHMRcwFQYDVQQDEw5B
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pWpjXwsA3A5GOtz0FpfgyC7OxsVcF7q4WHWZWleYXFKlQHJD73nQwXP968+A/3rB
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tkWQHi6syTjGsgkLcLNau5LZDQUdsGV+SAo3nBdWCRYV+I65x8Kf4hCxqqmjV3d/
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CpDtc0NT6vdJ45bCSzsCAwEAAaOBrzCBrDAMBgNVHRMBAf8EAjAAMBcGA1UdIAQQ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A.2.8. S/MIME signed-only multipart/signed over a complex message,
Injected Headers
This is a signed-only S/MIME message via PKCS#7 detached signature
(multipart/signed). The payload is a multipart/alternative message
with an inline image/png attachment. It uses the Injected Headers
header protection scheme.
It has the following structure:
└┬╴multipart/signed 5496 bytes
├┬╴multipart/mixed 1623 bytes
│├┬╴multipart/alternative 992 bytes
││├─╴text/plain 312 bytes
││└─╴text/html 396 bytes
│└─╴image/png inline 232 bytes
└─╴application/pkcs7-signature [smime.p7s] 3429 bytes
Its contents are:
MIME-Version: 1.0
Content-Type: multipart/signed;
protocol="application/pkcs7-signature"; boundary="a23";
micalg="sha-256"
Subject: smime-multipart-complex-injected
Message-ID: <smime-multipart-complex-injected@lhp.example>
From: Alice <alice@smime.example>
To: Bob <bob@smime.example>
Date: Sat, 20 Feb 2021 12:07:02 -0500
--a23
MIME-Version: 1.0
Subject: smime-multipart-complex-injected
Message-ID: <smime-multipart-complex-injected@lhp.example>
From: Alice <alice@smime.example>
To: Bob <bob@smime.example>
Date: Sat, 20 Feb 2021 12:07:02 -0500
Content-Type: multipart/mixed; boundary="d03"; protected-headers="v1"
--d03
MIME-Version: 1.0
Content-Type: multipart/alternative; boundary="8d8"
--8d8
Content-Type: text/plain; charset="us-ascii"
MIME-Version: 1.0
Content-Transfer-Encoding: 7bit
This is the smime-multipart-complex-injected message.
This is a signed-only S/MIME message via PKCS#7 detached signature
(multipart/signed). The payload is a multipart/alternative message
with an inline image/png attachment. It uses the Injected Headers
header protection scheme.
--
Alice
alice@smime.example
--8d8
Content-Type: text/html; charset="us-ascii"
MIME-Version: 1.0
Content-Transfer-Encoding: 7bit
<html><head><title></title></head><body>
<p>This is the <b>smime-multipart-complex-injected</b> message.</p>
<p>This is a signed-only S/MIME message via PKCS#7 detached signature
(multipart/signed). The payload is a multipart/alternative message
with an inline image/png attachment. It uses the Injected Headers
header protection scheme.</p>
<p><tt>-- <br/>Alice<br/>alice@smime.example</tt></p>
--8d8--
--d03
Content-Type: image/png
Content-Transfer-Encoding: base64
Content-Disposition: inline
iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAAcElEQVR42uVTOxbA
MAgS739nO3TpRw20dqpbfARQEjOywiwYnCtkDKnbcLk66sqlT+zt9cidkE+6KwkZ
sgrzfcqVMpL2jo0447gYDpeArk+OnJHkIhAfTPRicihAf5YJrw7vjv0ZWRWM/uli
vdPf1QZ2kDD9xppd8wAAAABJRU5ErkJggg==
--d03--
--a23
Content-Transfer-Encoding: base64
Content-Type: application/pkcs7-signature; name="smime.p7s"
MIIJ4AYJKoZIhvcNAQcCoIIJ0TCCCc0CAQExDTALBglghkgBZQMEAgEwCwYJKoZI
hvcNAQcBoIIHpjCCA88wggK3oAMCAQICEw8tJb0ROZdKzkJUh6HuPTQGirQwDQYJ
KoZIhvcNAQENBQAwVTENMAsGA1UEChMESUVURjERMA8GA1UECxMITEFNUFMgV0cx
MTAvBgNVBAMTKFNhbXBsZSBMQU1QUyBSU0EgQ2VydGlmaWNhdGlvbiBBdXRob3Jp
dHkwIBcNMTkxMTIwMDY1NDE4WhgPMjA1MjA5MjcwNjU0MThaMDsxDTALBgNVBAoT
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--a23--
A.3. Encrypted-and-signed Messages
These messages are encrypted and signed. They use PKCS#7 signedData
inside envelopedData, with different header protection schemes and
different Header Confidentiality Policies.
A.3.1. S/MIME encrypted and signed over a simple message, Wrapped
Message with hcp_minimal
This is a encrypted and signed S/MIME message using PKCS#7
envelopedData around signedData. The payload is a text/plain
message. It uses the Wrapped Message header protection scheme with
the hcp_minimal Header Confidentiality Policy.
It has the following structure:
└─╴application/pkcs7-mime [smime.p7m] 7345 bytes
↧ (decrypts to)
└─╴application/pkcs7-mime [smime.p7m] 4436 bytes
⇩ (unwraps to)
└┬╴message/rfc822 679 bytes
└─╴text/plain 321 bytes
Its contents are:
Content-Transfer-Encoding: base64
Content-Type: application/pkcs7-mime; name="smime.p7m";
smime-type="enveloped-data"
Subject: [...]
Message-ID: <smime-enc-signed-wrapped-minimal@lhp.example>
From: Alice <alice@smime.example>
To: Bob <bob@smime.example>
Date: Sat, 20 Feb 2021 10:08:02 -0500
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y/1c1Q5/M6kyq5M2iI9ggd7hrqTcEh9Xy1dRBPdCljXyWZo2eTnp0n9whXZbMtLu
lIZc102dTwLWWXM7uLK3xDQS653AQKc8C46DW3GslHl5+jW00C5orPHh5xeLX9UO
A.3.2. S/MIME encrypted and signed over a simple message, Injected
Headers with hcp_minimal
This is a encrypted and signed S/MIME message using PKCS#7
envelopedData around signedData. The payload is a text/plain
message. It uses the Injected Headers header protection scheme with
the hcp_minimal Header Confidentiality Policy.
It has the following structure:
└─╴application/pkcs7-mime [smime.p7m] 7305 bytes
↧ (decrypts to)
└─╴application/pkcs7-mime [smime.p7m] 4406 bytes
⇩ (unwraps to)
└─╴text/plain 333 bytes
Its contents are:
Content-Transfer-Encoding: base64
Content-Type: application/pkcs7-mime; name="smime.p7m";
smime-type="enveloped-data"
Subject: [...]
Message-ID: <smime-enc-signed-injected-minimal@lhp.example>
From: Alice <alice@smime.example>
To: Bob <bob@smime.example>
Date: Sat, 20 Feb 2021 10:09:02 -0500
MIIVDAYJKoZIhvcNAQcDoIIU/TCCFPkCAQAxggMQMIIBhAIBADBsMFUxDTALBgNV
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V+LiVvvQxHGpGiZEaV7onQ==
A.3.3. S/MIME encrypted and signed over a simple message, Injected
Headers with hcp_minimal (+ Legacy Display)
This is a encrypted and signed S/MIME message using PKCS#7
envelopedData around signedData. The payload is a text/plain
message. It uses the Injected Headers header protection scheme with
the hcp_minimal Header Confidentiality Policy with a "Legacy Display"
part.
It has the following structure:
└─╴application/pkcs7-mime [smime.p7m] 7865 bytes
↧ (decrypts to)
└─╴application/pkcs7-mime [smime.p7m] 4810 bytes
⇩ (unwraps to)
└┬╴multipart/mixed 923 bytes
├─╴text/plain 51 bytes
└─╴text/plain 370 bytes
Its contents are:
Content-Transfer-Encoding: base64
Content-Type: application/pkcs7-mime; name="smime.p7m";
smime-type="enveloped-data"
Subject: [...]
Message-ID:
<smime-enc-signed-injected-minimal-legacy@lhp.example>
From: Alice <alice@smime.example>
To: Bob <bob@smime.example>
Date: Sat, 20 Feb 2021 10:10:02 -0500
MIIWrAYJKoZIhvcNAQcDoIIWnTCCFpkCAQAxggMQMIIBhAIBADBsMFUxDTALBgNV
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A.3.4. S/MIME encrypted and signed over a simple message, Wrapped
Message with hcp_strong
This is a encrypted and signed S/MIME message using PKCS#7
envelopedData around signedData. The payload is a text/plain
message. It uses the Wrapped Message header protection scheme with
the hcp_strong Header Confidentiality Policy.
It has the following structure:
└─╴application/pkcs7-mime [smime.p7m] 7345 bytes
↧ (decrypts to)
└─╴application/pkcs7-mime [smime.p7m] 4432 bytes
⇩ (unwraps to)
└┬╴message/rfc822 675 bytes
└─╴text/plain 319 bytes
Its contents are:
Content-Transfer-Encoding: base64
Content-Type: application/pkcs7-mime; name="smime.p7m";
smime-type="enveloped-data"
Subject: [...]
Message-ID: <73a42f8e-8f5a-5c62-b982-82ace766fd32@lhp.example>
From: Alice <alice@smime.example>
To: Bob <bob@smime.example>
Date: Sat, 20 Feb 2021 10:11:02 -0500
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uo42n/3t82Dx/5s3p9rZnhWXUdO0etjL88GpyzvdwtkYy3Nj/8afvB62iUwZ1fR5
rcnklWkphSq9HL6brXQsS3lODDHsy8xIJlu5RrGD2MOIOy/rbMxNT5WnGoZ6j/RJ
Spn1f944h2LkyVFFNgIlq1W6MLfTNBrZZ6kMpJ8X39iL5KmkrQ1me1rgJTtM4heK
A.3.5. S/MIME encrypted and signed over a simple message, Injected
Headers with hcp_strong
This is a encrypted and signed S/MIME message using PKCS#7
envelopedData around signedData. The payload is a text/plain
message. It uses the Injected Headers header protection scheme with
the hcp_strong Header Confidentiality Policy.
It has the following structure:
└─╴application/pkcs7-mime [smime.p7m] 7305 bytes
↧ (decrypts to)
└─╴application/pkcs7-mime [smime.p7m] 4402 bytes
⇩ (unwraps to)
└─╴text/plain 331 bytes
Its contents are:
Content-Transfer-Encoding: base64
Content-Type: application/pkcs7-mime; name="smime.p7m";
smime-type="enveloped-data"
Subject: [...]
Message-ID: <27139e00-e05f-581d-a339-d2bd43bd0f42@lhp.example>
From: Alice <alice@smime.example>
To: Bob <bob@smime.example>
Date: Sat, 20 Feb 2021 10:12:02 -0500
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HKN7LhzMs5nWvxM2m6J26kzfbM3+d5W361BvgU6v9oCE8uSobGI/sSNP0kgGU9Cx
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Jck3h1nygfBehDUwsLTWPg==
A.3.6. S/MIME encrypted and signed over a simple message, Injected
Headers with hcp_strong (+ Legacy Display)
This is a encrypted and signed S/MIME message using PKCS#7
envelopedData around signedData. The payload is a text/plain
message. It uses the Injected Headers header protection scheme with
the hcp_strong Header Confidentiality Policy with a "Legacy Display"
part.
It has the following structure:
└─╴application/pkcs7-mime [smime.p7m] 7845 bytes
↧ (decrypts to)
└─╴application/pkcs7-mime [smime.p7m] 4802 bytes
⇩ (unwraps to)
└┬╴multipart/mixed 918 bytes
├─╴text/plain 50 bytes
└─╴text/plain 367 bytes
Its contents are:
Content-Transfer-Encoding: base64
Content-Type: application/pkcs7-mime; name="smime.p7m";
smime-type="enveloped-data"
Subject: [...]
Message-ID: <73a42f8e-8f5a-5c62-b982-82ace766fd32@lhp.example>
From: Alice <alice@smime.example>
To: Bob <bob@smime.example>
Date: Sat, 20 Feb 2021 10:13:02 -0500
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A.3.7. S/MIME encrypted and signed reply over a simple message, Wrapped
Message with hcp_minimal
This is a encrypted and signed S/MIME message using PKCS#7
envelopedData around signedData. The payload is a text/plain
message. It uses the Wrapped Message header protection scheme with
the hcp_minimal Header Confidentiality Policy.
It has the following structure:
└─╴application/pkcs7-mime [smime.p7m] 7605 bytes
↧ (decrypts to)
└─╴application/pkcs7-mime [smime.p7m] 4626 bytes
⇩ (unwraps to)
└┬╴message/rfc822 816 bytes
└─╴text/plain 327 bytes
Its contents are:
Content-Transfer-Encoding: base64
Content-Type: application/pkcs7-mime; name="smime.p7m";
smime-type="enveloped-data"
Subject: [...]
Message-ID: <smime-enc-signed-wrapped-minimal-reply@lhp.example>
From: Alice <alice@smime.example>
To: Bob <bob@smime.example>
Date: Sat, 20 Feb 2021 10:14:02 -0500
In-Reply-To: <smime-enc-signed-wrapped-minimal@lhp.example>
References: <smime-enc-signed-wrapped-minimal@lhp.example>
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A.3.8. S/MIME encrypted and signed reply over a simple message,
Injected Headers with hcp_minimal
This is a encrypted and signed S/MIME message using PKCS#7
envelopedData around signedData. The payload is a text/plain
message. It uses the Injected Headers header protection scheme with
the hcp_minimal Header Confidentiality Policy.
It has the following structure:
└─╴application/pkcs7-mime [smime.p7m] 7585 bytes
↧ (decrypts to)
└─╴application/pkcs7-mime [smime.p7m] 4600 bytes
⇩ (unwraps to)
└─╴text/plain 339 bytes
Its contents are:
Content-Transfer-Encoding: base64
Content-Type: application/pkcs7-mime; name="smime.p7m";
smime-type="enveloped-data"
Subject: [...]
Message-ID:
<smime-enc-signed-injected-minimal-reply@lhp.example>
From: Alice <alice@smime.example>
To: Bob <bob@smime.example>
Date: Sat, 20 Feb 2021 10:15:02 -0500
In-Reply-To: <smime-enc-signed-injected-minimal@lhp.example>
References: <smime-enc-signed-injected-minimal@lhp.example>
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A.3.9. S/MIME encrypted and signed reply over a simple message,
Injected Headers with hcp_minimal (+ Legacy Display)
This is a encrypted and signed S/MIME message using PKCS#7
envelopedData around signedData. The payload is a text/plain
message. It uses the Injected Headers header protection scheme with
the hcp_minimal Header Confidentiality Policy with a "Legacy Display"
part.
It has the following structure:
└─╴application/pkcs7-mime [smime.p7m] 8170 bytes
↧ (decrypts to)
└─╴application/pkcs7-mime [smime.p7m] 5034 bytes
⇩ (unwraps to)
└┬╴multipart/mixed 1082 bytes
├─╴text/plain 57 bytes
└─╴text/plain 376 bytes
Its contents are:
Content-Transfer-Encoding: base64
Content-Type: application/pkcs7-mime; name="smime.p7m";
smime-type="enveloped-data"
Subject: [...]
Message-ID:
<smime-enc-signed-injected-minimal-legacy-reply@lhp.example>
From: Alice <alice@smime.example>
To: Bob <bob@smime.example>
Date: Sat, 20 Feb 2021 10:16:02 -0500
In-Reply-To:
<smime-enc-signed-injected-minimal-legacy@lhp.example>
References:
<smime-enc-signed-injected-minimal-legacy@lhp.example>
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Td8ulTmmLG6hyNn3E+cL5Tinka/j92yxTzzUA2TU1uE=
A.3.10. S/MIME encrypted and signed reply over a simple message,
Wrapped Message with hcp_strong
This is a encrypted and signed S/MIME message using PKCS#7
envelopedData around signedData. The payload is a text/plain
message. It uses the Wrapped Message header protection scheme with
the hcp_strong Header Confidentiality Policy.
It has the following structure:
└─╴application/pkcs7-mime [smime.p7m] 7605 bytes
↧ (decrypts to)
└─╴application/pkcs7-mime [smime.p7m] 4616 bytes
⇩ (unwraps to)
└┬╴message/rfc822 810 bytes
└─╴text/plain 325 bytes
Its contents are:
Content-Transfer-Encoding: base64
Content-Type: application/pkcs7-mime; name="smime.p7m";
smime-type="enveloped-data"
Subject: [...]
Message-ID: <fdccb76a-49ed-50c5-9030-e4aeb83d7f04@lhp.example>
From: Alice <alice@smime.example>
To: Bob <bob@smime.example>
Date: Sat, 20 Feb 2021 10:17:02 -0500
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A.3.11. S/MIME encrypted and signed reply over a simple message,
Injected Headers with hcp_strong
This is a encrypted and signed S/MIME message using PKCS#7
envelopedData around signedData. The payload is a text/plain
message. It uses the Injected Headers header protection scheme with
the hcp_strong Header Confidentiality Policy.
It has the following structure:
└─╴application/pkcs7-mime [smime.p7m] 7565 bytes
↧ (decrypts to)
└─╴application/pkcs7-mime [smime.p7m] 4592 bytes
⇩ (unwraps to)
└─╴text/plain 337 bytes
Its contents are:
Content-Transfer-Encoding: base64
Content-Type: application/pkcs7-mime; name="smime.p7m";
smime-type="enveloped-data"
Subject: [...]
Message-ID: <0e210732-9184-5855-9a95-2a635560d3a6@lhp.example>
From: Alice <alice@smime.example>
To: Bob <bob@smime.example>
Date: Sat, 20 Feb 2021 10:18:02 -0500
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w7LgVMRJKMMDllquSaKDrQ==
A.3.12. S/MIME encrypted and signed reply over a simple message,
Injected Headers with hcp_strong (+ Legacy Display)
This is a encrypted and signed S/MIME message using PKCS#7
envelopedData around signedData. The payload is a text/plain
message. It uses the Injected Headers header protection scheme with
the hcp_strong Header Confidentiality Policy with a "Legacy Display"
part.
It has the following structure:
└─╴application/pkcs7-mime [smime.p7m] 8150 bytes
↧ (decrypts to)
└─╴application/pkcs7-mime [smime.p7m] 5022 bytes
⇩ (unwraps to)
└┬╴multipart/mixed 1075 bytes
├─╴text/plain 56 bytes
└─╴text/plain 373 bytes
Its contents are:
Content-Transfer-Encoding: base64
Content-Type: application/pkcs7-mime; name="smime.p7m";
smime-type="enveloped-data"
Subject: [...]
Message-ID: <27139e00-e05f-581d-a339-d2bd43bd0f42@lhp.example>
From: Alice <alice@smime.example>
To: Bob <bob@smime.example>
Date: Sat, 20 Feb 2021 10:19:02 -0500
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A.3.13. S/MIME encrypted and signed over a complex message, Wrapped
Message with hcp_minimal
This is a encrypted and signed S/MIME message using PKCS#7
envelopedData around signedData. The payload is a multipart/
alternative message with an inline image/png attachment. It uses the
Wrapped Message header protection scheme with the hcp_minimal Header
Confidentiality Policy.
It has the following structure:
└─╴application/pkcs7-mime [smime.p7m] 9450 bytes
↧ (decrypts to)
└─╴application/pkcs7-mime [smime.p7m] 5982 bytes
⇩ (unwraps to)
└┬╴message/rfc822 1805 bytes
└┬╴multipart/mixed 1741 bytes
├┬╴multipart/alternative 1118 bytes
│├─╴text/plain 375 bytes
│└─╴text/html 459 bytes
└─╴image/png inline 232 bytes
Its contents are:
Content-Transfer-Encoding: base64
Content-Type: application/pkcs7-mime; name="smime.p7m";
smime-type="enveloped-data"
Subject: [...]
Message-ID:
<smime-enc-signed-complex-wrapped-minimal@lhp.example>
From: Alice <alice@smime.example>
To: Bob <bob@smime.example>
Date: Sat, 20 Feb 2021 12:08:02 -0500
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fRAIhT6rto+gbnDKGQffeQ==
A.3.14. S/MIME encrypted and signed over a complex message, Injected
Headers with hcp_minimal
This is a encrypted and signed S/MIME message using PKCS#7
envelopedData around signedData. The payload is a multipart/
alternative message with an inline image/png attachment. It uses the
Injected Headers header protection scheme with the hcp_minimal Header
Confidentiality Policy.
It has the following structure:
└─╴application/pkcs7-mime [smime.p7m] 9470 bytes
↧ (decrypts to)
└─╴application/pkcs7-mime [smime.p7m] 6006 bytes
⇩ (unwraps to)
└┬╴multipart/mixed 1771 bytes
├┬╴multipart/alternative 1122 bytes
│├─╴text/plain 387 bytes
│└─╴text/html 468 bytes
└─╴image/png inline 236 bytes
Its contents are:
Content-Transfer-Encoding: base64
Content-Type: application/pkcs7-mime; name="smime.p7m";
smime-type="enveloped-data"
Subject: [...]
Message-ID:
<smime-enc-signed-complex-injected-minimal@lhp.example>
From: Alice <alice@smime.example>
To: Bob <bob@smime.example>
Date: Sat, 20 Feb 2021 12:09:02 -0500
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xKgCvub2mwWSwCGP4tHGKWpAaoTX2b6uP5Kb7N7HDRE=
A.3.15. S/MIME encrypted and signed over a complex message, Injected
Headers with hcp_minimal (+ Legacy Display)
This is a encrypted and signed S/MIME message using PKCS#7
envelopedData around signedData. The payload is a multipart/
alternative message with an inline image/png attachment. It uses the
Injected Headers header protection scheme with the hcp_minimal Header
Confidentiality Policy with a "Legacy Display" part.
It has the following structure:
└─╴application/pkcs7-mime [smime.p7m] 10120 bytes
↧ (decrypts to)
└─╴application/pkcs7-mime [smime.p7m] 6474 bytes
⇩ (unwraps to)
└┬╴multipart/mixed 2095 bytes
├─╴text/plain 59 bytes
└┬╴multipart/mixed 1600 bytes
├┬╴multipart/alternative 1194 bytes
│├─╴text/plain 424 bytes
│└─╴text/html 505 bytes
└─╴image/png inline 236 bytes
Its contents are:
Content-Transfer-Encoding: base64
Content-Type: application/pkcs7-mime; name="smime.p7m";
smime-type="enveloped-data"
Subject: [...]
Message-ID:
<smime-enc-signed-complex-injected-minimal-legacy@lhp.example>
From: Alice <alice@smime.example>
To: Bob <bob@smime.example>
Date: Sat, 20 Feb 2021 12:10:02 -0500
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A.3.16. S/MIME encrypted and signed over a complex message, Wrapped
Message with hcp_strong
This is a encrypted and signed S/MIME message using PKCS#7
envelopedData around signedData. The payload is a multipart/
alternative message with an inline image/png attachment. It uses the
Wrapped Message header protection scheme with the hcp_strong Header
Confidentiality Policy.
It has the following structure:
└─╴application/pkcs7-mime [smime.p7m] 9425 bytes
↧ (decrypts to)
└─╴application/pkcs7-mime [smime.p7m] 5974 bytes
⇩ (unwraps to)
└┬╴message/rfc822 1799 bytes
└┬╴multipart/mixed 1735 bytes
├┬╴multipart/alternative 1114 bytes
│├─╴text/plain 373 bytes
│└─╴text/html 457 bytes
└─╴image/png inline 232 bytes
Its contents are:
Content-Transfer-Encoding: base64
Content-Type: application/pkcs7-mime; name="smime.p7m";
smime-type="enveloped-data"
Subject: [...]
Message-ID: <0b3ea6dd-0e91-5a91-9bc0-3d553f892983@lhp.example>
From: Alice <alice@smime.example>
To: Bob <bob@smime.example>
Date: Sat, 20 Feb 2021 12:11:02 -0500
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A.3.17. S/MIME encrypted and signed over a complex message, Injected
Headers with hcp_strong
This is a encrypted and signed S/MIME message using PKCS#7
envelopedData around signedData. The payload is a multipart/
alternative message with an inline image/png attachment. It uses the
Injected Headers header protection scheme with the hcp_strong Header
Confidentiality Policy.
It has the following structure:
└─╴application/pkcs7-mime [smime.p7m] 9470 bytes
↧ (decrypts to)
└─╴application/pkcs7-mime [smime.p7m] 5998 bytes
⇩ (unwraps to)
└┬╴multipart/mixed 1765 bytes
├┬╴multipart/alternative 1118 bytes
│├─╴text/plain 385 bytes
│└─╴text/html 466 bytes
└─╴image/png inline 236 bytes
Its contents are:
Content-Transfer-Encoding: base64
Content-Type: application/pkcs7-mime; name="smime.p7m";
smime-type="enveloped-data"
Subject: [...]
Message-ID: <b10dcc75-cf43-5fd7-9e48-f932a9d68fb5@lhp.example>
From: Alice <alice@smime.example>
To: Bob <bob@smime.example>
Date: Sat, 20 Feb 2021 12:12:02 -0500
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bnPly68qrr8l7x/DxYHFJ6pwZ8LYPg8XkZb4k3TmLZrA4ys3a81R5RKHkwmc9qAI
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naZLCDk2EcSquYtna4J4BvyQXdcebEz8/zSNK6jS1v8=
A.3.18. S/MIME encrypted and signed over a complex message, Injected
Headers with hcp_strong (+ Legacy Display)
This is a encrypted and signed S/MIME message using PKCS#7
envelopedData around signedData. The payload is a multipart/
alternative message with an inline image/png attachment. It uses the
Injected Headers header protection scheme with the hcp_strong Header
Confidentiality Policy with a "Legacy Display" part.
It has the following structure:
└─╴application/pkcs7-mime [smime.p7m] 10100 bytes
↧ (decrypts to)
└─╴application/pkcs7-mime [smime.p7m] 6460 bytes
⇩ (unwraps to)
└┬╴multipart/mixed 2088 bytes
├─╴text/plain 58 bytes
└┬╴multipart/mixed 1596 bytes
├┬╴multipart/alternative 1190 bytes
│├─╴text/plain 421 bytes
│└─╴text/html 502 bytes
└─╴image/png inline 236 bytes
Its contents are:
Content-Transfer-Encoding: base64
Content-Type: application/pkcs7-mime; name="smime.p7m";
smime-type="enveloped-data"
Subject: [...]
Message-ID: <fdccb76a-49ed-50c5-9030-e4aeb83d7f04@lhp.example>
From: Alice <alice@smime.example>
To: Bob <bob@smime.example>
Date: Sat, 20 Feb 2021 12:13:02 -0500
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Gd0+hXYLrw1ooZzXU7ujig==
A.3.19. S/MIME encrypted and signed reply over a complex message,
Wrapped Message with hcp_minimal
This is a encrypted and signed S/MIME message using PKCS#7
envelopedData around signedData. The payload is a multipart/
alternative message with an inline image/png attachment. It uses the
Wrapped Message header protection scheme with the hcp_minimal Header
Confidentiality Policy.
It has the following structure:
└─╴application/pkcs7-mime [smime.p7m] 9750 bytes
↧ (decrypts to)
└─╴application/pkcs7-mime [smime.p7m] 6200 bytes
⇩ (unwraps to)
└┬╴message/rfc822 1964 bytes
└┬╴multipart/mixed 1900 bytes
├┬╴multipart/alternative 1130 bytes
│├─╴text/plain 381 bytes
│└─╴text/html 465 bytes
└─╴image/png inline 232 bytes
Its contents are:
Content-Transfer-Encoding: base64
Content-Type: application/pkcs7-mime; name="smime.p7m";
smime-type="enveloped-data"
Subject: [...]
Message-ID:
<smime-enc-signed-complex-wrapped-minimal-reply@lhp.example>
From: Alice <alice@smime.example>
To: Bob <bob@smime.example>
Date: Sat, 20 Feb 2021 12:14:02 -0500
In-Reply-To:
<smime-enc-signed-complex-wrapped-minimal@lhp.example>
References:
<smime-enc-signed-complex-wrapped-minimal@lhp.example>
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EhuVvdmkaOS8RUjAg3ZR5ch7FBGgGFQDZgHdlBS9YNzIhMhLvBpdBaRD1uYX26s7
A.3.20. S/MIME encrypted and signed reply over a complex message,
Injected Headers with hcp_minimal
This is a encrypted and signed S/MIME message using PKCS#7
envelopedData around signedData. The payload is a multipart/
alternative message with an inline image/png attachment. It uses the
Injected Headers header protection scheme with the hcp_minimal Header
Confidentiality Policy.
It has the following structure:
└─╴application/pkcs7-mime [smime.p7m] 9775 bytes
↧ (decrypts to)
└─╴application/pkcs7-mime [smime.p7m] 6230 bytes
⇩ (unwraps to)
└┬╴multipart/mixed 1932 bytes
├┬╴multipart/alternative 1134 bytes
│├─╴text/plain 393 bytes
│└─╴text/html 474 bytes
└─╴image/png inline 236 bytes
Its contents are:
Content-Transfer-Encoding: base64
Content-Type: application/pkcs7-mime; name="smime.p7m";
smime-type="enveloped-data"
Subject: [...]
Message-ID:
<smime-enc-signed-complex-injected-minimal-reply@lhp.example>
From: Alice <alice@smime.example>
To: Bob <bob@smime.example>
Date: Sat, 20 Feb 2021 12:15:02 -0500
In-Reply-To:
<smime-enc-signed-complex-injected-minimal@lhp.example>
References:
<smime-enc-signed-complex-injected-minimal@lhp.example>
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2dMW0WXIaHCmqPGvg7jEa6iuJI5aOlf0/4xJeqDGfCHR2Rgv5z5K3P7McigBW/ty
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8ZKQFnWbzFUnhg2ZD7ODrOpjI0/pEe0C6H/Xs2ZpZj4yyhjrA7bHvNXis4D3pF1r
XbfBYGttazBT8UpAMo1jrUqP4lQ79nBKaTn+nvLD8hpARG1IYiSUe/VMpRLyJ+1J
Tk+jwqMrD00wALSsoGM5pgA8CWWIAZGz6T5YXkZxI5ArGJd4bj0YR8g7kUI/TYfn
sMZcROMB31ts24gfQJLWAqYbLI01rf0DH48FTzhE09ZHDDNO0kolViosU8i8HTI+
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BvdgLI+cdV+sKOi+2EJ3Vg==
A.3.21. S/MIME encrypted and signed reply over a complex message,
Injected Headers with hcp_minimal (+ Legacy Display)
This is a encrypted and signed S/MIME message using PKCS#7
envelopedData around signedData. The payload is a multipart/
alternative message with an inline image/png attachment. It uses the
Injected Headers header protection scheme with the hcp_minimal Header
Confidentiality Policy with a "Legacy Display" part.
It has the following structure:
└─╴application/pkcs7-mime [smime.p7m] 10465 bytes
↧ (decrypts to)
└─╴application/pkcs7-mime [smime.p7m] 6728 bytes
⇩ (unwraps to)
└┬╴multipart/mixed 2278 bytes
├─╴text/plain 65 bytes
└┬╴multipart/mixed 1612 bytes
├┬╴multipart/alternative 1206 bytes
│├─╴text/plain 430 bytes
│└─╴text/html 511 bytes
└─╴image/png inline 236 bytes
Its contents are:
Content-Transfer-Encoding: base64
Content-Type: application/pkcs7-mime; name="smime.p7m";
smime-type="enveloped-data"
Subject: [...]
Message-ID: <smime-enc-signed-complex-injected-minimal-legacy-reply@lhp.example>
From: Alice <alice@smime.example>
To: Bob <bob@smime.example>
Date: Sat, 20 Feb 2021 12:16:02 -0500
In-Reply-To:
<smime-enc-signed-complex-injected-minimal-legacy@lhp.example>
References:
<smime-enc-signed-complex-injected-minimal-legacy@lhp.example>
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A.3.22. S/MIME encrypted and signed reply over a complex message,
Wrapped Message with hcp_strong
This is a encrypted and signed S/MIME message using PKCS#7
envelopedData around signedData. The payload is a multipart/
alternative message with an inline image/png attachment. It uses the
Wrapped Message header protection scheme with the hcp_strong Header
Confidentiality Policy.
It has the following structure:
└─╴application/pkcs7-mime [smime.p7m] 9730 bytes
↧ (decrypts to)
└─╴application/pkcs7-mime [smime.p7m] 6192 bytes
⇩ (unwraps to)
└┬╴message/rfc822 1956 bytes
└┬╴multipart/mixed 1892 bytes
├┬╴multipart/alternative 1126 bytes
│├─╴text/plain 379 bytes
│└─╴text/html 463 bytes
└─╴image/png inline 232 bytes
Its contents are:
Content-Transfer-Encoding: base64
Content-Type: application/pkcs7-mime; name="smime.p7m";
smime-type="enveloped-data"
Subject: [...]
Message-ID: <95b9bb39-c028-5ff4-99b1-f179cb5d7585@lhp.example>
From: Alice <alice@smime.example>
To: Bob <bob@smime.example>
Date: Sat, 20 Feb 2021 12:17:02 -0500
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A.3.23. S/MIME encrypted and signed reply over a complex message,
Injected Headers with hcp_strong
This is a encrypted and signed S/MIME message using PKCS#7
envelopedData around signedData. The payload is a multipart/
alternative message with an inline image/png attachment. It uses the
Injected Headers header protection scheme with the hcp_strong Header
Confidentiality Policy.
It has the following structure:
└─╴application/pkcs7-mime [smime.p7m] 9775 bytes
↧ (decrypts to)
└─╴application/pkcs7-mime [smime.p7m] 6222 bytes
⇩ (unwraps to)
└┬╴multipart/mixed 1924 bytes
├┬╴multipart/alternative 1130 bytes
│├─╴text/plain 391 bytes
│└─╴text/html 472 bytes
└─╴image/png inline 236 bytes
Its contents are:
Content-Transfer-Encoding: base64
Content-Type: application/pkcs7-mime; name="smime.p7m";
smime-type="enveloped-data"
Subject: [...]
Message-ID: <23abef5f-8781-5c95-a46c-61e3a4464d58@lhp.example>
From: Alice <alice@smime.example>
To: Bob <bob@smime.example>
Date: Sat, 20 Feb 2021 12:18:02 -0500
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dTYlFvjuVh2TudqGzxeP9g==
A.3.24. S/MIME encrypted and signed reply over a complex message,
Injected Headers with hcp_strong (+ Legacy Display)
This is a encrypted and signed S/MIME message using PKCS#7
envelopedData around signedData. The payload is a multipart/
alternative message with an inline image/png attachment. It uses the
Injected Headers header protection scheme with the hcp_strong Header
Confidentiality Policy with a "Legacy Display" part.
It has the following structure:
└─╴application/pkcs7-mime [smime.p7m] 10445 bytes
↧ (decrypts to)
└─╴application/pkcs7-mime [smime.p7m] 6712 bytes
⇩ (unwraps to)
└┬╴multipart/mixed 2269 bytes
├─╴text/plain 64 bytes
└┬╴multipart/mixed 1608 bytes
├┬╴multipart/alternative 1202 bytes
│├─╴text/plain 427 bytes
│└─╴text/html 508 bytes
└─╴image/png inline 236 bytes
Its contents are:
Content-Transfer-Encoding: base64
Content-Type: application/pkcs7-mime; name="smime.p7m";
smime-type="enveloped-data"
Subject: [...]
Message-ID: <0e210732-9184-5855-9a95-2a635560d3a6@lhp.example>
From: Alice <alice@smime.example>
To: Bob <bob@smime.example>
Date: Sat, 20 Feb 2021 12:19:02 -0500
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Appendix B. Additional information Appendix B. Additional information
B.1. Stored Variants of Messages with Bcc B.1. Stored Variants of Messages with Bcc
Messages containing at least one recipient address in the Bcc header Messages containing at least one recipient address in the Bcc header
field may appear in up to three different variants: field may appear in up to three different variants:
1. The Message for the recipient addresses listed in To or Cc header 1. The Message for the recipient addresses listed in To or Cc header
fields, which must not include the Bcc header field neither for fields, which must not include the Bcc header field neither for
skipping to change at page 45, line 14 skipping to change at page 166, line 14
While minor editorial suggestions and nit-picks can be made as merge While minor editorial suggestions and nit-picks can be made as merge
requests (https://gitlab.com/dkg/lamps-header-protection), please requests (https://gitlab.com/dkg/lamps-header-protection), please
direct all substantive discussion to the LAMPS mailing list direct all substantive discussion to the LAMPS mailing list
(https://www.ietf.org/mailman/listinfo/spasm) at "spasm@ietf.org". (https://www.ietf.org/mailman/listinfo/spasm) at "spasm@ietf.org".
Appendix E. Document Changelog Appendix E. Document Changelog
[[ RFC Editor: This section is to be removed before publication ]] [[ RFC Editor: This section is to be removed before publication ]]
* draft-ietf-lamps-header-protection-04
- add test vectors
- add "problems with Injected Messages" subsection
* draft-ietf-lamps-header-protection-03 * draft-ietf-lamps-header-protection-03
- dkg takes over from Bernie as primary author - dkg takes over from Bernie as primary author
- Add Usability section - Add Usability section
- describe two distinct formats "Wrapped Message" and "Injected - describe two distinct formats "Wrapped Message" and "Injected
Headers" Headers"
- Introduce Header Confidentiality Policy model - Introduce Header Confidentiality Policy model
skipping to change at page 46, line 28 skipping to change at page 167, line 34
Appendix F. Open Issues Appendix F. Open Issues
[[ RFC Editor: This section should be empty and is to be removed [[ RFC Editor: This section should be empty and is to be removed
before publication. ]] before publication. ]]
* Ensure "protected header" (Ex-Memory-Hole) option is (fully) * Ensure "protected header" (Ex-Memory-Hole) option is (fully)
compliant with the MIME standard, in particular also [RFC2046], compliant with the MIME standard, in particular also [RFC2046],
Section 5.1. (Multipart Media Type) Appendix C.1.1.1. Section 5.1. (Multipart Media Type) Appendix C.1.1.1.
* Test Vectors! This should be a new appendix section, to avoid * Test Vectors! We can point to the relevant test vector in the
injecting large blobs of unreadable data in the main text. Once main text by reference. We should also include in the test
present, we can point to the relevant test vector in the main text vectors an encrypted message that references another message, so
by reference. we can observe the effect of the HCP on threading.
* Should Outer Message Header Section (as received) be preserved for * Should Outer Message Header Section (as received) be preserved for
the user? (Section 4.1.4.5) the user? (Section 4.1.4.5)
* Decide on whether or not merge requirements from * Decide on whether or not merge requirements from
[I-D.ietf-lamps-header-protection-requirements] into this [I-D.ietf-lamps-header-protection-requirements] into this
document. document.
* Decide what parts of [I-D.autocrypt-lamps-protected-headers] to * Decide what parts of [I-D.autocrypt-lamps-protected-headers] to
merge into this document. merge into this document.
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