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TECHNICAL SPECIFICATION
Electronic Signatures and Infrastructures (ESI);
CAdES digital signatures;
Part 2: Extended CAdES signatures
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2 ETSI TS 119 122-2 V1.0.1 (2015-07)
Reference
RTS/ESI-0019122-2-TS
Keywords
ASN.1, CAdES, electronic signature, security
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3 ETSI TS 119 122-2 V1.0.1 (2015-07)
Contents
Intellectual Property Rights . 4
Foreword . 4
Modal verbs terminology . 4
Introduction . 4
1 Scope . 5
2 References . 5
2.1 Normative references . 5
2.2 Informative references . 5
3 Definitions and abbreviations . 6
3.1 Definitions . 6
3.2 Abbreviations . 6
4 Additional CAdES levels without references to validation data . 6
4.1 Overview . 6
4.2 General requirements . 6
4.3 CAdES-E-BES, CAdES-EPES, CAdES-E-T and CAdES-E-A built on CAdES-E-T signatures . 7
5 Legacy signatures . 11
Annex A (normative): CAdES levels with references to validation data . 12
A.1 CAdES-E-C, CAdES-E-X, CAdES-E-X-Long and CAdES-E-X-L signatures . 12
A.2 CAdES-E-A signatures on CAdES signatures with references to validation data . 16
Annex B (informative): Change History . 19
History . 20
ETSI
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4 ETSI TS 119 122-2 V1.0.1 (2015-07)
Intellectual Property Rights
IPRs essential or potentially essential to the present document may have been declared to ETSI. The information
pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found
in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in
respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web
server (http://ipr.etsi.org).
Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee
can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web
server) which are, or may be, or may become, essential to the present document.
Foreword
This Technical Specification (TS) has been produced by ETSI Technical Committee Electronic Signatures and
Infrastructures (ESI).
The present document is part 2 of a multi-part deliverable covering CAdES digital signatures. Full details of the entire
series can be found in part 1 [1].
The present document partly contains an evolved specification of CAdES previously published as
ETSI TS 101 733 [i.1].
Modal verbs terminology
In the present document "shall", "shall not", "should", "should not", "may", "need not", "will", "will not", "can" and
(Verbal forms for the expression of
"cannot" are to be interpreted as described in clause 3.2 of the ETSI Drafting Rules
provisions).
"must" and "must not" are NOT allowed in ETSI deliverables except when used in direct citation.
Introduction
Electronic commerce has emerged as a frequent way of doing business between companies across local, wide area and
global networks. Trust in this way of doing business is essential for the success and continued development of
electronic commerce. It is therefore important that companies using this electronic means of doing business have
suitable security controls and mechanisms in place to protect their transactions and to ensure trust and confidence with
their business partners. In this respect digital signatures are an important security component that can be used to protect
information and provide trust in electronic business.
The present document is intended to cover digital signatures supported by PKI and public key certificates, and aims to
meet the general requirements of the international community to provide trust and confidence in electronic transactions,
including, amongst other, applicable requirements from Regulation (EU) No 910/2014 [i.7].
The present document can be used for any transaction between an individual and a company, between two companies,
between an individual and a governmental body, etc. The present document is independent of any environment. It can
be applied to any environment e.g. smart cards, GSM SIM cards, special programs for electronic signatures, etc.
The present document is part of a rationalized framework of standards (see ETSI TR 119 000 [i.2]). See
ETSI TR 119 100 [i.4] for getting guidance on how to use the present document within the aforementioned framework.
ETSI
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5 ETSI TS 119 122-2 V1.0.1 (2015-07)
1 Scope
The present document specifies CAdES digital signatures. CAdES signatures are built on CMS signatures [i.8], by
incorporation of signed and unsigned attributes, which fulfil certain common requirements (such as the long term
validity of digital signatures, for instance) in a number of use cases.
The present document specifies a number of CAdES signature levels addressing incremental requirements to maintain
the validity of the signatures over the long term, in a way that a certain level always addresses all the requirements
addressed at levels that are below it. These CAdES extended signatures a higher degree of optionality than the CAdES
baseline signatures specified in ETSI TS 119 122-1 [1].
The present document aims at supporting digital signatures in different regulatory frameworks.
NOTE: Specifically but not exclusively, CAdES digital signatures specified in the present document aim at
supporting electronic signatures, advanced electronic signatures, qualified electronic signatures,
electronic seals, advanced electronic seals, and qualified electronic seals as per Regulation (EU)
No 910/2014 [i.7].
2 References
2.1 Normative references
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the
reference document (including any amendments) applies.
Referenced documents which are not found to be publicly available in the expected location might be found at
http://docbox.etsi.org/Reference.
NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee
their long term validity.
The following referenced documents are necessary for the application of the present document.
[1] ETSI TS 119 122-1: "Electronic Signatures and Infrastructures (ESI); CAdES digital signatures;
Part 1: Building blocks and CAdES baseline signatures".
2.2 Informative references
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the
reference document (including any amendments) applies.
NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee
their long term validity.
The following referenced documents are not necessary for the application of the present document but they assist the
user with regard to a particular subject area.
[i.1] ETSI TS 101 733: "Electronic Signatures and Infrastructures (ESI); CMS Advanced Electronic
Signatures (CAdES)".
[i.2] ETSI TR 119 000: "Electronic Signatures and Infrastructures (ESI); Rationalized structure for
Electronic Signature Standardization".
[i.3] ETSI TR 119 001: "Electronic Signatures and Infrastructures (ESI); Definitions and
abbreviations".
[i.4] ETSI TR 119 100: "Electronic Signatures and Infrastructures (ESI); Business Driven Guidance for
Signature Creation and Validation".
ETSI
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6 ETSI TS 119 122-2 V1.0.1 (2015-07)
[i.5] ETSI TS 119 172-1: "Electronic Signatures and Infrastructures (ESI); Signature policies;
Part 1: Building blocks and table of contents for human readable signature policy documents".
[i.6] ETSI TS 119 312: "Electronic Signatures and Infrastructures (ESI); Cryptographic Suites".
[i.7] Regulation (EU) No 910/2014 of the European Parliament and of the Council of 23 July 2014 on
electronic identification and trust services for electronic transactions in the internal market and
repealing Directive 1999/93/EC.
[i.8] IETF RFC 5652 (2009): "Cryptographic Message Syntax (CMS)".
3 Definitions and abbreviations
3.1 Definitions
For the purposes of the present document, the terms and definitions given in ETSI TR 119 001 [i.3] and the following
apply:
CAdES signature: digital signature that satisfies the requirements specified within the present document
digital signature: data appended to, or a cryptographic transformation (see cryptography) of a data unit that allows a
recipient of the data unit to prove the source and integrity of the data unit and protect against forgery e.g. by the
recipient
legacy CAdES 101 733 signature: CAdES signature generated according to ETSI TS 101 733 [i.1]
3.2 Abbreviations
For the purposes of the present document, the abbreviations given in ETSI TR 119 001 [i.3] apply.
4 Additional CAdES levels without references to
validation data
4.1 Overview
The present document specifies a number of additional levels of CAdES.
Each level is created by a combination of attributes defined in ETSI TS 119 122-1 [1].
NOTE 1: Clause 4.3 defines four CAdES levels namely the CAdES-E-BES, CAdES-E-EPES, CAdES-E-T, and
CAdES-E-A built on CAdES-E-T. The normative annex A defines levels of CAdES signatures
incorporating attributes that encapsulate references to validation data and attributes that encapsulate
time-stamp tokens on the aforementioned references.
NOTE 2: The requirements on the presence and cardinality of the attributes for each CAdES signature level are
expressed in tables whose formats and semantics are as specified in clause 6.2.2 of
ETSI TS 119 122-1 [1].
4.2 General requirements
The general CMS syntax shall be as specified in ETSI TS 119 122-1 [1], clause 4.
The signature shall contain a CMS SignedData, as defined in ETSI TS 119 122-1 [1], clause 4.4 and at least one
SignerInfo (ETSI TS 119 122-1 [1], clauses 4.6).
The algorithms and key lengths used to generate signatures should comply with ETSI TS 119 312 [i.6].
ETSI
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7 ETSI TS 119 122-2 V1.0.1 (2015-07)
4.3 CAdES-E-BES, CAdES-EPES, CAdES-E-T and
CAdES-E-A built on CAdES-E-T signatures
CAdES-E-BES, CAdES-EPES, CAdES-E-T, and CAdES-E-A built on CAdES-E-T signatures shall be CAdES
signatures whose attributes satisfy the requirements specified in the present clause.
CAdES-E-EPES signatures are built on CAdES-E-BES signatures by adding one signature-policy-
identifier attribute.
CAdES-E-T signatures are built on CAdES-E-BES or CAdES-E-EPES signatures by adding one or more
signature-time-stamp attributes.
CAdES-E-A signatures are built on CAdES-E-T, CAdES-E-C, CAdES-E-X (of Type 1 and of Type 2), CAdES-E-X-
Long, and CAdES-E-X-L (of Type 1 and of Type 2) signatures.
Annex A specifies CAdES-E-C, CAdES-E-X (of Type 1 and of Type 2), CAdES-E-X-Long, and CAdES-E-X-L (of
Type 1 and of Type 2) signatures, and CAdES-E-A built on them.
ETSI
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8 ETSI TS 119 122-2 V1.0.1 (2015-07)
Table 1: Requirements for CAdES-E-BES, CAdES-E-EPES, CAdES-E-T and CAdES-E-A built on CAdES-E-T
Additional
Signature Presence in Presence in Presence in Presence in
Cardinality References requirements
fields/Attributes/Services E-BES level E-EPES level E-T level E-A level
and notes
ETSI TS 119 122-1 [1],
content-type shall be present shall be present shall be present shall be present 1
clause 5.1.1
ETSI TS 119 122-1 [1],
message-digest shall be present shall be present shall be present shall be present 1
clause 5.1.2
Service: protection of signing ETSI TS 119 122-1 [1],
shall be provided shall be provided shall be provided shall be provided 1
certificate clause 5.2.2
SPO: ESS signing- conditioned conditioned conditioned conditioned ETSI TS 119 122-1 [1],
0 or 1 a, e
certificate presence presence presence presence clause 5.2.2.2
SPO: ESS signing- conditioned conditioned conditioned conditioned ETSI TS 119 122-1 [1],
0 or 1 b, e
certificate-v2 presence presence presence presence clause 5.2.2.3
ETSI TS 119 122-1 [1],
Signing-time
may be present may be present may be present may be present 0 or 1
clause 5.2.1
ETSI TS 119 122-1 [1],
commitment-type-indication
may be present may be present may be present may be present 0 or 1
clause 5.2.3
ETSI TS 119 122-1 [1],
content-hints
may be present may be present may be present may be present 0 or 1
clause 5.2.4.1
ETSI TS 119 122-1 [1],
mime-type
may be present may be present may be present may be present 0 or 1
clause 5.2.4.2
ETSI TS 119 122-1 [1],
signer-location may be present may be present may be present may be present 0 or 1
clause 5.2.5
ETSI TS 119 122-1 [1],
signer-attributes-v2
may be present may be present may be present may be present 0 or 1
clause 5.2.6.1
ETSI TS 119 122-1 [1],
countersignature
may be present may be present may be present may be present ≥ 0
clause 5.2.7
ETSI TS 119 122-1 [1],
content-time-stamp
may be present may be present may be present may be present ≥ 0 1
clause 5.2.8
E-EPES: 1
ETSI TS 119 122-1 [1],
signature-policy-identifier
* shall be present may be present may be present E-BES, E-T, E-A: 2, 3
clause 5.2.9.1
0 or 1
conditioned conditioned conditioned ETSI TS 119 122-1 [1],
signature-policy-store
* 0 or 1 c
presence presence presence clause 5.2.10
ETSI TS 119 122-1 [1],
content-reference may be present may be present may be present may be present 0 or 1
clause 5.2.11
ETSI TS 119 122-1 [1],
content-identifier
may be present may be present may be present may be present 0 or 1
clause 5.2.12
E-BES, E-EPES:
ETSI TS 119 122-1 [1],
signature-time-stamp * * shall be present shall be present ≥ 0 f, 1, 4
clause 5.3
E-T, E-A: ≥ 1
complete-certificate-
ETSI TS 119 122-1 [1],
* * * * 0 or 1 e
references
clause A.1.1.1
ETSI
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9 ETSI TS 119 122-2 V1.0.1 (2015-07)
Additional
Signature Presence in Presence in Presence in Presence in
Cardinality References requirements
fields/Attributes/Services E-BES level E-EPES level E-T level E-A level
and notes
complete-revocation-
ETSI TS 119 122-1 [1],
* * * * 0 or 1
references
clause A.1.2.1
attribute-certificate-
ETSI TS 119 122-1 [1],
* * * * 0 or 1 d, e
references
clause A.1.3
attribute-revocation-
ETSI TS 119 122-1 [1],
* * * * 0 or 1 d
references
clause A.1.4
ETSI TS 119 122-1 [1],
CAdES-C-timestamp * * * * ≥ 0 1
clause A.1.5.2
time-stamped-certs-crls- ETSI TS 119 122-1 [1],
* *
* * ≥ 0 1
references
clause A.1.5.1
E-BES, E-EPES,
Service: certificate values in long-
* * * shall be provided E-T: ≥ 0 g, h
term validation
E-A: ≥ 1
conditioned ETSI TS 119 122-1 [1],
SPO: SignedData.certificates * * * 0 or 1 i
presence clause 4.4
ETSI TS 119 122-1 [1],
SPO: certificate-values * * * * 0 or 1
clause A.1.1.2
E-BES, E-EPES,
Service: revocation values in long-
E-T: 0 or 1
* * * shall be provided j,k
term validation
E-A: 1
conditioned ETSI TS 119 122-1 [1],
SPO: SignedData.crls.crl * * * 0 or 1 l
presence clause 4.4
SPO: conditioned ETSI TS 119 122-1 [1],
* * * 0 or 1 m
SignedData.crls.other
presence clause 4.4
ETSI TS 119 122-1 [1],
SPO revocation-values
* * * * 0 or 1
clause A.1.2.2
E-BES, E-EPES,
ETSI TS 119 122-1 [1],
Service: add archive time-stamp * * * shall be provided E-T: ≥ 0
clause 5.6.1
E-A: ≥ 1
conditioned ETSI TS 119 122-1 [1],
SPO: archive-time-stamp-v3 * * * ≥ 0 n, o, p
presence clause 5.6.2
conditioned ETSI TS 119 122-1 [1],
SPO: long-term-validation * * * ≥ 0 n, o, q, 5
presence clause A.2.5
ETSI
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10 ETSI TS 119 122-2 V1.0.1 (2015-07)
Additional requirements:
a) Requirement for SPO: ESS signing-certificate. The ESS signing-certificate attribute shall
be used if the SHA-1 hash algorithm is used.
b) Requirement for SPO: ESS signing-certificate-v2. The ESS signing-certificate-v2
attribute shall be used when another hash algorithms than SHA-1 is used.
c) Requirement for signature-policy-store. The signature-policy-store attribute may be
incorporated in the CAdES signature only if the signature-policy-identifier attribute is also
incorporated and i
...