a positive test proves Ze does what the requirement demands and a negative one proves it refuses what the requirement forbids
Future
RFC 8031 - Curve25519 and Curve448 for the Internet Key Exchange Protocol Version 2 (IKEv2) Key Agreement
Every requirement this repository extracted from RFC 8031, the tests bound to it, and what a reader has verified about them. This summary is not enrolled.
Overview
Positive
what Ze has
the requirement admits no counter-case, so one polarity plus a recorded reason is the whole proof available for it
one direction is tested, the other is neither tested nor excused, and nothing states which
scoped tests exist; the remaining obligation is unmet or unproven, with zero whole-requirement credit
a red was observed once under a recorded procedure, and the unit, the claim and the producer it rested on still hash to what was recorded. The break is not re-run. A test pair is not a proof until one has been observed
Neutral
measures that are neither good news nor bad
MUST-level requirements this summary DECLARES. The gate holds none of them, because this RFC is not enrolled (out-of-scope), so every share below reads what the summary records rather than what the gate enforces
an obligation that does not bind Ze. A {not-applicable} annotation says it never bound; a {feature-declined} annotation says its condition is an optional feature Ze does not offer, and quotes the RFC sentence that makes it optional. Scope, not coverage: it stays in the denominator every share on this page is taken over
a {not-applicable} annotation says the obligation does not bind Ze, so no test is owed for it. It stays in the denominator every share here is taken over
a {lower-layer} annotation says a layer under Ze performs the behavior, on state Ze installs into that layer, and names the producer that installs it. The obligation binds Ze and is met; Ze proves none of it, because its own boundary carries no value the behavior reads
a {feature-declined} annotation says the obligation is conditional on a feature the RFC makes optional and Ze does not offer, and it quotes the sentence that makes it optional. The condition is false, so nothing is owed and nothing is missing. It stays in the denominator every share here is taken over
Linux cannot provide the primitive this requirement needs. The obligation still binds Ze and remains unmet; it stays in every denominator and earns no proof credit
Negative
what Ze owes
no test carries the requirement id, whether or not a gap states why
The 9 shares marked as a part above are the whole of the 3 gated MUSTs: they add to 100%. Proven by a recorded break is a share of TAGGED UNITS, a different population, so it is not one of them.
How to read the colors
A color names what the measure MEANS, not how well Ze scores on it. Green is a good outcome at any value, red is a bad one, and neither a population nor a scope count is an outcome, so both take no color. The number under the label is what says how far Ze has got.
| Card | Tone here | Why that color |
|---|---|---|
| MUSTs declared | neutral | no color: a population is a scale, and a larger one is neither good news nor bad. It is the accounting total |
| Out of scope | neutral | no color: an obligation that never bound Ze is neither an achievement nor a failure, and counting it either way would be a claim |
| Tested both ways | ok | green at every value: a test pair is the outcome this gate exists to produce, and the share under the label is what says how far Ze has got |
| One polarity plus reason | ok | green at every value: where no counter-case exists, one polarity IS the complete answer, and a recorded reason is what the gate demands beside it |
| One polarity, unexcused | ok | green at zero, RED above it: half a proof with no reason for the other half |
| Partial proof; remaining gap | ok | green at zero, RED above it: a tested clause cannot prove the whole requirement |
| No test at all | bad | green at zero, RED above it: a binding obligation nothing exercises is a claim with nothing behind it, whether or not a reason is stated |
| Not applicable | neutral | no color: an obligation that never bound Ze is neither an achievement nor a failure, and counting it either way would be a claim |
| Met below Ze | neutral | no color: an obligation met below Ze is neither a test Ze wrote nor work Ze owes, and the two green shares above are what says how much Ze proves itself |
| Optional feature declined | neutral | no color: an obligation whose condition Ze never meets is neither an achievement nor a failure. The absent FEATURE is disclosed on the RFC's own status row, as an implementation gap a later scope decision can revisit |
| Linux cannot do this | neutral | neutral at every value: an evidenced platform limit is neither a proof nor a scope exemption |
| Proven by a recorded break | ok | green at every value: an observed break is the outcome the discrimination gate exists to produce. The denominator is TAGGED UNITS, not obligations, so this share is not one of the parts above |
| Audit verdicts | warn | RED on the first weak, wrong or unimplemented verdict, amber while a verdict is no longer current or a gated MUST is unjudged, green when every one is judged sound and current |
At a glance
| Field | Value |
|---|---|
| Public status | Future |
| Enrolment | Not enrolled (out-of-scope) |
| Requirements | 3 |
| Gated MUST-level | 3 |
| Not applicable, so out of scope | 0 |
| Declared gaps | 3 |
| Declared gaps a test demonstrates | 0 |
| Gated with no test | 0 |
| Nightly-only evidence | 0 |
| Test tags | 0 |
| Tagged units | 0 |
| Recorded audit verdicts | 0 |
| Discrimination records | 0 |
| Summary | rfc/short/rfc8031.md |
| Requirement shard | rfc/requirements/rfc8031.md |
| RFC text | rfc/full/rfc8031.txt |
Enrolment
Not enrolled (out-of-scope, the requirements ARE extracted and the owner decided not to offer the feature for now, so the absence is a scope decision rather than a conformance gap): OUT OF SCOPE as a document by owner decision, 2026-10-26: the owner rule committed in 1e7a9dbc34 (ai/META-DECISIONS.md, Goal and scope) counts an RFC a profile lists as optional only once Thomas brings it into scope, and this summary's `Optional use cases` row lists this RFC in the optional tier of the vpn-endpoint and vpn-concentrator profiles. The extraction is COMPLETE: the source text is at rfc/full/rfc8031.txt and the extraction sign-off is rfc/extraction/rfc8031.json. Ze implements none of it, and each MUST-level row keeps its `{gap}` note naming the absent producer: all 3 MUST-level requirements are classified, and all 3 are `{gap}`, because Ze's IKE engine implements neither Diffie-Hellman group 31 nor group 32. `internal/component/ike/crypto/dh.go::NewDHExchange` builds MODP group 14 and ECP groups 19 and 20 only, and answers `ErrUnsupportedGroup` for every other group number.
What the public ledger says
Status: Future
What the ledger says is covered:
None: the IKE engine offers and accepts Diffie-Hellman groups 14, 19 and 20 only (internal/component/ike/crypto/transform.go, internal/component/ike/crypto/dh.go::NewDHExchange).
What the ledger says remains
Groups 31 (Curve25519) and 32 (Curve448) are absent: no X25519 or X448 key generation, no 32 or 56 octet Key Exchange Data, no RFC 7748 Section 5 recipient handling. All 3 MUST-level requirements are annotated{gap} in rfc/short/rfc8031.md. Out of scope by owner decision, 2026-10-26.
Coverage
| Bucket | Count | What it counts |
|---|---|---|
| Positive and negative tests | 0 | one part of the gated population |
| Annotated (including scoped evidence) | 3 | one part of the gated population |
| One polarity only | 0 | one part of the gated population |
| No test and no annotation | 0 | one part of the gated population |
| Partial proof; remaining gap (subset of annotated; zero whole-requirement credit) | 0 | an overlay: each of these is also counted by the part it falls in |
| Evidence that runs nightly only | 0 | an overlay: each of these is also counted by the part it falls in |
| Derived from other rows | 0 | outside the gated population: each asserts nothing and derives its state from the rows it names, which the parts above already count |
| Gated MUST-level requirements | 3 | every gated MUST falls in exactly one bucket above |
Annotated (including scoped evidence) (3): RFC8031-2-1, RFC8031-3.2-1, RFC8031-3.2-2
Attainable ceiling
Mandatory ceiling: 3 of 3 (100.0%). Optional ceiling: no rows. Every RFC shown with measured rows can reach 100% under current classifications. Lowest mandatory ceiling: rfc8031 3 of 3 (100.0%). Ceilings describe current classifications, not an immutable Linux maximum. Not-applicable and feature-declined classifications can be revisited. Every gap remains work Ze owes.
Requirements
| Requirement | Level | Section | Tests |
|---|---|---|---|
RFC8031-2-1 | Implementations of Curve25519 and Curve448 in IKEv2 SHALL follow the steps described in this section. (§2) | ||
| SHALL | 2 | positive
no testno positive testnegative
no testno negative test{gap}: Ze implements neither group: internal/component/ike/crypto/dh.go::NewDHExchange handles groups 14, 19 and 20 and returns ErrUnsupportedGroup for 31 and 32, so no X25519 or X448 computation exists; internal/component/ike/crypto/dh.go |
|
RFC8031-3.2-1 | Receiving and handling of incompatible point formats MUST follow the considerations described in Section 5 of [RFC7748]. (§3.2) | ||
| MUST | 3.2 | positive
no testno positive testnegative
no testno negative test{gap}: no group 31 or 32 Key Exchange Data is ever decoded, because internal/component/ike/crypto/dh.go::NewDHExchange refuses both groups before any recipient handling; internal/component/ike/crypto/dh.go |
|
RFC8031-3.2-2 | In particular, receiving entities MUST mask the most-significant bit in the final byte for X25519 (but not X448), and implementations MUST accept non- canonical values. (§3.2) | ||
| MUST | 3.2 | positive
no testno positive testnegative
no testno negative test{gap}: no X25519 or X448 public value is received or masked, because internal/component/ike/crypto/dh.go::NewDHExchange refuses groups 31 and 32; internal/component/ike/crypto/dh.go |
|
Gaps and untested MUSTs
| Requirement | State | Reason |
|---|---|---|
RFC8031-2-1 Implementations of Curve25519 and Curve448 in IKEv2 SHALL follow the steps described in this section. (§2) |
{gap}, no test | Ze implements neither group: internal/component/ike/crypto/dh.go::NewDHExchange handles groups 14, 19 and 20 and returns ErrUnsupportedGroup for 31 and 32, so no X25519 or X448 computation exists; internal/component/ike/crypto/dh.go |
RFC8031-3.2-1 Receiving and handling of incompatible point formats MUST follow the considerations described in Section 5 of [RFC7748]. (§3.2) |
{gap}, no test | no group 31 or 32 Key Exchange Data is ever decoded, because internal/component/ike/crypto/dh.go::NewDHExchange refuses both groups before any recipient handling; internal/component/ike/crypto/dh.go |
RFC8031-3.2-2 In particular, receiving entities MUST mask the most-significant bit in the final byte for X25519 (but not X448), and implementations MUST accept non- canonical values. (§3.2) |
{gap}, no test | no X25519 or X448 public value is received or masked, because internal/component/ike/crypto/dh.go::NewDHExchange refuses groups 31 and 32; internal/component/ike/crypto/dh.go |
Proof state
A tagged unit reads unproven where no discrimination record exists for it: nothing in this tree has been observed to break it, so the claim its tag makes is unproven.
RFC8031-2-1
Implementations of Curve25519 and Curve448 in IKEv2 SHALL follow the steps described in this section. (§2)
Audit verdict: not audited: no reader has judged these tests
No test carries RFC8031-2-1, so no unit is bound to it.
RFC8031-3.2-1
Receiving and handling of incompatible point formats MUST follow the considerations described in Section 5 of [RFC7748]. (§3.2)
Audit verdict: not audited: no reader has judged these tests
No test carries RFC8031-3.2-1, so no unit is bound to it.
RFC8031-3.2-2
In particular, receiving entities MUST mask the most-significant bit in the final byte for X25519 (but not X448), and implementations MUST accept non- canonical values. (§3.2)
Audit verdict: not audited: no reader has judged these tests
No test carries RFC8031-3.2-2, so no unit is bound to it.
Extraction sign-off
| Field | Value |
|---|---|
| Reviewer | claude |
| Signed off | 2026-10-26 |
| Register | rfc2119 |
| Source | rfc/full/rfc8031.txt |
| Source fingerprint | c75bde78bf8c4e10 |
| Record | rfc/extraction/rfc8031.json |
| Mapped sentences | 3 |
| Declined as scope | 0 |
| Relocated to a spec, which Ze OWES | 0 |
| Unclassified | 0 |
Sections
| Section | Name | Sites | Disposition | Reason |
|---|---|---|---|---|
front |
not stated | 0 | walked | not stated |
1 |
not stated | 0 | walked | not stated |
1.1 |
not stated | 0 | walked | not stated |
2 |
not stated | 1 | walked | not stated |
3 |
not stated | 0 | walked | not stated |
3.1 |
not stated | 0 | walked | not stated |
3.2 |
not stated | 2 | walked | not stated |
4 |
not stated | 0 | walked | not stated |
5 |
not stated | 0 | walked | not stated |
6 |
not stated | 0 | walked | not stated |
6.1 |
not stated | 0 | walked | not stated |
6.2 |
not stated | 0 | walked | not stated |
A |
not stated | 0 | walked | not stated |
Excluded sentences
The walk over RFC 8031 declined no sentence: every site it found is mapped to a requirement.
Superseded
No document obsoletes RFC 8031, so its obligations are stated where they were written.