ETSI TS 119 144-4 V1.1.1 (2016-06)

Electronic Signatures and Infrastructures (ESI); PAdES digital signatures - Testing Conformance and Interoperability; Part 4: Testing Conformance of PAdES baseline signatures

This multi-part deliverable provides technical specifications for helping  implementers and accelerating the development of PAdES signature creation and validation applications. The test results may also be used in conformity assessment for signature creation and validation applications (EN 19 103) with policies requiring conformity to PAdES formats and procedures. First, it will define test suites as completely as possible for supporting the organization of interoperability testing events where different PAdES related applications may check their actual interoperability. Additionally, it will include the specifications required for building up software tools for actually testing technical compliance of PAdES signatures against the relevant PAdES related technical specifications. This part 4 will specify, among other things, rules for testing compliance of signatures against the PAdES specification. It will allow developing a tool that can automatically check that generated PAdES signatures are fully compliant with EN 319 142, without any statement on their validity.

General Information

• Status: Published
• Publication Date: 23-Jun-2016
• Technical Committee: ESI - Electronic Signatures and Infrastructures
• Current Stage: 12 - Completion
• Due Date: 06-Jul-2016
• Completion Date: 24-Jun-2016
• Mandate: M/460

Standards Content (Sample)

ETSI TS 119 144-4 V1.1.1 (2016-06)






TECHNICAL SPECIFICATION
Electronic Signatures and Infrastructures (ESI);
PAdES digital signatures -
Testing Conformance and Interoperability;
Part 4: Testing Conformance of PAdES baseline signatures

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2 ETSI TS 119 144-4 V1.1.1 (2016-06)



Reference
DTS/ESI-0019144-4
Keywords
conformance, e-commerce, electronic signature,
PAdES, profile, security, testing

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3 ETSI TS 119 144-4 V1.1.1 (2016-06)
Contents
Intellectual Property Rights . 4
Foreword . 4
Modal verbs terminology . 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
3.3 Abbreviations . 6
4 Overview . 6
5 Testing conformance to PAdES-B-B signatures . 7
5.1 Introduction . 7
5.2 Testing signature dictionary elements . 7
5.3 Testing CMS signature elements . 9
6 Testing conformance to PAdES-B-T signatures . 11
6.1 General requirements . 11
6.2 Testing trusted signing time . 11
7 Testing conformance to PAdES-B-LT signatures . 12
7.1 General requirements . 12
7.2 Testing DSS dictionary . 12
8 Testing conformance to PAdES-B-LTA signatures . 13
8.1 General requirements . 13
8.2 Testing DTS dictionary . 13
Annex A (informative): Bibliography . 14
History . 15


ETSI

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4 ETSI TS 119 144-4 V1.1.1 (2016-06)
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 (https://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 4 of a multi-part deliverable covering PAdES digital signatures - Testing Conformance
and Interoperability. Full details of the entire series can be found in part 1 [i.1].
A tool implementing the present document has been developed and is accessible at http://signatures-conformance-
checker.etsi.org/.
Modal verbs terminology
In the present document "shall", "shall not", "should", "should not", "may", "need not", "will", "will not", "can" and
"cannot" are to be interpreted as described in clause 3.2 of the ETSI Drafting Rules (Verbal forms for the expression of
provisions).
"must" and "must not" are NOT allowed in ETSI deliverables except when used in direct citation.
ETSI

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5 ETSI TS 119 144-4 V1.1.1 (2016-06)
1 Scope
The present document defines the set of checks to be performed for testing conformance of PAdES signatures against
PAdES baseline signatures as specified in ETSI EN 319 142-1 [1].
The present document does not specify checks leading to conclude whether a signature is technically valid or not (for
instance, it does not specify checks for determining whether the cryptographic material present in the signature may be
considered valid or not). In consequence, no conclusion may be inferred regarding the technical validity of a signature
that has been successfully tested by any tool conformant to the present document.
Checks specified by the present document are exclusively constrained to elements specified by PAdES [1].
Regarding PAdES attributes, the present document explicitly differentiates between structural requirements that are
defined on building blocks, and the requirements specified for PAdES baseline signatures conformance.
The present document is intentionally not linked to any software development technology and is also intentionally
agnostic on implementation strategies. This is one of the reasons why the test assertions set specified in the present
document includes tests on the correctness of the structure of all the elements specified by PAdES [1].
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
referenced 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 EN 319 142-1: "Electronic Signatures and Infrastructures (ESI); PAdES digital signatures;
Part 1: Building blocks and PAdES baseline signatures".
[2] ETSI EN 319 142-2: "Electronic Signatures and Infrastructures (ESI); PAdES digital signatures;
Part 2: Additional PAdES signatures profiles".
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
referenced 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 TR 119 144-1: "Electronic Signatures and Infrastructures (ESI); PAdES digital signatures -
Testing Conformance and Interoperability; Part 1: Overview".
[i.2] ETSI TR 119 001: "Electronic Signatures and Infrastructures (ESI); The framework for
standardization of signatures; Definitions and abbreviations".
ETSI

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6 ETSI TS 119 144-4 V1.1.1 (2016-06)
[i.3] OASIS Committee Notes: "Test Assertions Guidelines Version 1.0" Committee Note 02, 19 June
2013.
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.2] apply.
3.3 Abbreviations
For the purposes of the present document, the abbreviations given in ETSI TR 119 001 [i.2] apply.
4 Overview
The present clause describes the main aspects of the technical approach used for specifying the whole set of checks to
be performed for testing conformance to ETSI EN 319 142-1 [1].
ETSI EN 319 142-1 [1] defines requirements for building blocks and PAdES baseline signatures. For the purpose of
identifying the whole set of test assertions required for testing conformance against PAdES baseline signatures as
specified in ETSI EN 319 142-1 [1], the present document classifies the whole set of requirements specified in ETSI
EN 319 142-1 [1] in two groups as follows:
1) Requirements "PAdES_BS" (after "PAdES baseline signatures"): requirements defined in clauses 5 and 6 of
ETSI EN 319 142-1 [1]. These are requirements specific to PAdES baseline signatures.
2) Requirements "PAdES_BB" (after "PAdES building blocks"): requirements defined in clauses 4 and 5 of
ETSI EN 319 142-1 [1] and clauses 4 and 5 of ETSI EN 319 142-2 [2] to be satisfied by both PAdES baseline
signatures as specified in ETSI EN 319 142-1 [1] and additional PAdES signatures as specified in ETSI
EN 319 142-2 [2].
a) In order to test conformance against the aforementioned specification, several types of tests are identified, namely:
1) Tests on the signature structure.
2) Tests on values of specific elements and/or attributes.
3) Tests on interrelationship between different elements present in the signature.
4) Tests on computations reflected in the contents of the signatures (message imprints for a time-stamping
service, computed by digesting the concatenation of a number of elements of the signature, for instance).
b) No tests is included testing actual validity of the cryptographic material that might be present at the signature or to
be used for its verification (status of certificates for instance).
c) Tests are defined as test assertions following the work produced by OASIS in "Test Assertions Guidelines
Version 1.0" [i.3]. Each test assertion includes:
1) Unique identifier for further referencing. The identifiers of the assertions start with "PAdES_BS", after
"PAdES baseline signatures" and with "PAdES_BB", after "PAdES building blocks".
2) Reference to the Normative source for the test.
3) The Target of the assertion. In the normative part, this field identifies one of the four PAdES baseline
signatures [1] Conformance Levels.
ETSI

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7 ETSI TS 119 144-4 V1.1.1 (2016-06)
4) Prerequisite (optional) is, according to [i.3], "a logical expression (similar to a Predicate) which further
qualifies the Target for undergoing the core test (expressed by the Predicate) that addresses the Normative
Statement". It is used for building test assertions corresponding to requirements that are imposed under certain
conditions.
5) Predicate fully and unambiguously defining the assertion to be tested.
6) Prescription level. Three levels are defined: mandatory, recommended and permitted, whose semantics is to
be interpreted as described in clause 3.1.2 of [i.3].
7) Tag: information on the element tested by the assertion.
5 Testing conformance to PAdES-B-B signatures
5.1 Introduction
The present clause specifies the whole set of assertions to be tested on applications claiming conformance to
PAdES-B-B signatures as specified in ETSI EN 319 142-1 [1].
Clause 5.2 specifies assertions for testing those constraints imposed by the PAdES building blocks and baseline
signatures specification [1] to the signature dictionary elements.
Clause 5.3 specifies assertions for testing those constraints imposed by the PAdES building blocks and baseline
signatures specification [1] to the CMS signature included in the signature dictionary entry with the key Contents.
5.2 Testing signature dictionary elements
This clause defines the test assertions for signature dictionary elements requirements.
TA id: PAdES_BS/SDM/1
Normative source: [1] – Clause 6.3
Target: PAdES signature generator claiming conformance to PAdES signatures as specified in [1]
Predicate: For new signatures, applications include the claimed time of signing in the signature
dictionary entry with the key M.
Prescription level: mandatory
Tag: PAdES baseline signatures.

TA id: PAdES_BB/SDL/1
Normative source: [1] – Clause 6.3
Target: PAdES signature generator claiming conformance to PAdES signatures as specified in [1] or in
[2]
Predicate: For new signatures, applications include the CPU host name or physical location of the
signing in the signature dictionary entry with the key Location.
Prescription level: permitted
Tag: PAdES baseline and additional signatures.

TA id: PAdES_BB/SDR/1
Normative source: [1] – Clause 6.3
Target: PAdES signature generator claiming conformance to PAdES signatures as specified in [1] or in
[2]
Predicate: For new signatures, applications do not include the reason for the signing in the
signature dictionary entry with the key Reason if the signature-policy-identifier attribute is
present in the CMS signature.
Prescription level: mandatory
Tag: PAdES baseline and additional signatures.

TA id: PAdES_BB/SDR/2
Normative source: [1] – Clause 6.3
Target: PAdES signature generator claiming conformance to PAdES signatures as specified in [1] or in
[2]
Predicate: For new signatures, applications do not include the reason for the signing in the
signature dictionary entry with the key Reason if the commitment-type-indication attribute is
present in the CMS signature.
Prescription level: mandatory
Tag: PAdES baseline and additional signatures.

ETSI

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8 ETSI TS 119 144-4 V1.1.1 (2016-06)
TA id: PAdES_BB/SDC/1
Normative source: [1] – Clause 4.1
Target: PAdES signature generator claiming conformance to PAdES signatures as specified in [1] or in
[2]
Predicate: For new signatures, applications include the CMS signature in the signature dictionary
entry with the key Contents.
Prescription level: mandatory
Tag: PAdES baselin
...