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Query: break out backwardPropagate(), keep semantics unchanged!

Use backwardPropagate() as a wrapper from authenticate()
This commit is contained in:
Heiko Schaefer 2023-07-10 00:12:55 +02:00
parent 17e654687f
commit 2d23080cc7
No known key found for this signature in database
GPG key ID: 4A849A1904CCBD7D
2 changed files with 135 additions and 122 deletions

View file

@ -30,6 +30,9 @@ class BackPropagationTest {
assert(gotCerts.size == expectedPath.size)
assert(gotCerts.zip(expectedPath).none { it.first != it.second }) // FIXME: debug output?
println("got $gotPath")
println("expected $expectedPath")
assert(gotAmount == amount) { "Amount mismatch, got $gotAmount, expected $amount" }
assert(gotPath.residualDepth.value() == residualDepth
) { "Residual depth mismatch, got " + gotPath.residualDepth.value() + ", expected " + residualDepth }
@ -82,13 +85,13 @@ class BackPropagationTest {
val q = Query(network, Roots(), false)
val a1 = q.backwardPropagate(ellenFpr, ellenUid, false, IdempotentCertificationFilter())
val a1 = q.backwardPropagate(ellenFpr, ellenUid, IdempotentCertificationFilter())
checkResult(a1[daveFpr]!!, 1, 100, listOf(daveFpr, ellenFpr));
checkResult(a1[carolFpr]!!, 0, 100, listOf(carolFpr, daveFpr, ellenFpr));
val a2 = q.backwardPropagate(daveFpr, daveUid, false, IdempotentCertificationFilter());
val a2 = q.backwardPropagate(daveFpr, daveUid, IdempotentCertificationFilter());
assert(a2[ellenFpr] == null);
checkResult(a2[carolFpr]!!, 1, 100, listOf(carolFpr, daveFpr));
@ -96,7 +99,7 @@ class BackPropagationTest {
checkResult(a2[aliceFpr]!!, 0, 100, listOf(aliceFpr, bobFpr, carolFpr, daveFpr));
val a3 = q.backwardPropagate(daveFpr, daveUid, false, IdempotentCertificationFilter());
val a3 = q.backwardPropagate(daveFpr, daveUid, IdempotentCertificationFilter());
assert(a3[ellenFpr] == null);
checkResult(a3[carolFpr]!!, 1, 100, listOf(carolFpr, daveFpr));
@ -105,7 +108,7 @@ class BackPropagationTest {
// This should work even though Bob is the root and the path is via Bob.
checkResult(a3[aliceFpr]!!, 0, 100, listOf(aliceFpr, bobFpr, carolFpr, daveFpr));
val a4 = q.backwardPropagate(daveFpr, daveUid, false, IdempotentCertificationFilter());
val a4 = q.backwardPropagate(daveFpr, daveUid, IdempotentCertificationFilter());
assert(a4[ellenFpr] == null)
checkResult(a4[carolFpr]!!, 1, 100, listOf(carolFpr, daveFpr));
@ -115,7 +118,7 @@ class BackPropagationTest {
checkResult(a4[aliceFpr]!!, 0, 100, listOf(aliceFpr, bobFpr, carolFpr, daveFpr));
// Try to authenticate dave's key for an User ID that no one has certified.
val a5 = q.backwardPropagate(daveFpr, ellenUid, false, IdempotentCertificationFilter());
val a5 = q.backwardPropagate(daveFpr, ellenUid, IdempotentCertificationFilter());
assert(a5[ellenFpr] == null);
assert(a5[daveFpr] == null);
@ -125,7 +128,7 @@ class BackPropagationTest {
// A target that is not in the network.
val fpr = Fingerprint("0123456789ABCDEF0123456789ABCDEF01234567")
val a6 = q.backwardPropagate(fpr, ellenUid, false, IdempotentCertificationFilter());
val a6 = q.backwardPropagate(fpr, ellenUid, IdempotentCertificationFilter());
assert(a6[ellenFpr] == null);
assert(a6[daveFpr] == null);
@ -165,7 +168,7 @@ class BackPropagationTest {
println("Network contains " + network.nodes.size + " nodes with " + network.numberOfEdges + " edges built from " + network.numberOfSignatures + " signatures.")
val q = Query(network, Roots(), false)
val a1 = q.backwardPropagate(frankFpr, frankUid, false, IdempotentCertificationFilter());
val a1 = q.backwardPropagate(frankFpr, frankUid, IdempotentCertificationFilter());
checkResult(a1[edFpr]!!, 0, 120, listOf(edFpr, frankFpr));
checkResult(a1[daveFpr]!!, 0, 30, listOf(daveFpr, edFpr, frankFpr));
@ -173,7 +176,7 @@ class BackPropagationTest {
checkResult(a1[bobFpr]!!, 0, 30, listOf(bobFpr, carolFpr, daveFpr, edFpr, frankFpr));
assert(a1[aliceFpr] == null)
val a2 = q.backwardPropagate(frankFpr, frankUid, false, IdempotentCertificationFilter());
val a2 = q.backwardPropagate(frankFpr, frankUid, IdempotentCertificationFilter());
checkResult(a2[edFpr]!!, 0, 120, listOf(edFpr, frankFpr));
checkResult(a2[daveFpr]!!, 0, 30, listOf(daveFpr, edFpr, frankFpr));
@ -181,7 +184,7 @@ class BackPropagationTest {
checkResult(a2[bobFpr]!!, 0, 30, listOf(bobFpr, carolFpr, daveFpr, edFpr, frankFpr));
assert(a2[aliceFpr] == null)
val a3 = q.backwardPropagate(edFpr, edUid, false, IdempotentCertificationFilter());
val a3 = q.backwardPropagate(edFpr, edUid, IdempotentCertificationFilter());
assert(a3[frankFpr] == null)
checkResult(a3[daveFpr]!!, 1, 30, listOf(daveFpr, edFpr));
@ -189,7 +192,7 @@ class BackPropagationTest {
checkResult(a3[bobFpr]!!, 1, 30, listOf(bobFpr, carolFpr, daveFpr, edFpr));
checkResult(a3[aliceFpr]!!, 0, 30, listOf(aliceFpr, bobFpr, carolFpr, daveFpr, edFpr));
val a4 = q.backwardPropagate(carolFpr, carolUid, false, IdempotentCertificationFilter());
val a4 = q.backwardPropagate(carolFpr, carolUid, IdempotentCertificationFilter());
assert(a4[frankFpr] == null);
assert(a4[edFpr] == null);
@ -243,7 +246,7 @@ class BackPropagationTest {
val n1 = getNetwork("/home/heiko/src/sequoia-wot/tests/data/cliques.pgp")
val q1 = Query(n1, Roots(), false)
val a1 = q1.backwardPropagate(target_fpr, target_uid, false, IdempotentCertificationFilter());
val a1 = q1.backwardPropagate(target_fpr, target_uid, IdempotentCertificationFilter());
// root -> a-0 -> b-0 -> ... -> f-0 -> target
checkResult(a1[root_fpr]!!, 90, 120,
@ -264,7 +267,7 @@ class BackPropagationTest {
val n2 = getNetwork("/home/heiko/src/sequoia-wot/tests/data/cliques-local-optima.pgp")
val q2 = Query(n2, Roots(), false)
val a2 = q2.backwardPropagate(target_fpr, target_uid, false, IdempotentCertificationFilter());
val a2 = q2.backwardPropagate(target_fpr, target_uid, IdempotentCertificationFilter());
// root -> a-0 -> b-0 -> ... -> f-0 -> target
checkResult(a2[root_fpr]!!,
@ -283,7 +286,7 @@ class BackPropagationTest {
val n3 = getNetwork("/home/heiko/src/sequoia-wot/tests/data/cliques-local-optima-2.pgp")
val q3 = Query(n3, Roots(), false)
val a3 = q3.backwardPropagate(target_fpr, target_uid, false, IdempotentCertificationFilter());
val a3 = q3.backwardPropagate(target_fpr, target_uid, IdempotentCertificationFilter());
// root -> a-0 -> b-0 -> ... -> f-0 -> target
checkResult(a3[root_fpr]!!, 94, 30,
@ -347,14 +350,14 @@ class BackPropagationTest {
val q1 = Query(n1, Roots(), false)
val a1 = q1.backwardPropagate(isaacFpr, isaacUid, false, IdempotentCertificationFilter());
val a1 = q1.backwardPropagate(isaacFpr, isaacUid, IdempotentCertificationFilter());
checkResult(a1[aliceFpr]!!, 0, 60, listOf(aliceFpr, bobFpr, georgeFpr, henryFpr, isaacFpr));
assert(a1[carolFpr] == null)
assert(a1[jennyFpr] == null)
val a2 = q1.backwardPropagate(henryFpr, henryUid, false, IdempotentCertificationFilter());
val a2 = q1.backwardPropagate(henryFpr, henryUid, IdempotentCertificationFilter());
// The backward propagation algorithm doesn't know that jenny
// is not reachable from the root (alice).
@ -404,7 +407,7 @@ class BackPropagationTest {
val n1 = getNetwork("/home/heiko/src/sequoia-wot/tests/data/local-optima.pgp")
val q = Query(n1, Roots(), false)
val a1 = q.backwardPropagate(henry_fpr, henry_uid, false, IdempotentCertificationFilter());
val a1 = q.backwardPropagate(henry_fpr, henry_uid, IdempotentCertificationFilter());
checkResult(a1[alice_fpr]!!, 0, 100, listOf(alice_fpr, bob_fpr, carol_fpr, ellen_fpr, henry_fpr));
checkResult(a1[bob_fpr]!!, 0, 100, listOf(bob_fpr, carol_fpr, ellen_fpr, henry_fpr));
@ -414,7 +417,7 @@ class BackPropagationTest {
assert(a1[francis_fpr] == null)
assert(a1[georgina_fpr] == null)
val a2 = q.backwardPropagate(francis_fpr, francis_uid, false, IdempotentCertificationFilter());
val a2 = q.backwardPropagate(francis_fpr, francis_uid, IdempotentCertificationFilter());
// Recall: given a choice, we prefer the forward pointer that
// has the least depth.
@ -457,13 +460,13 @@ class BackPropagationTest {
val n1 = getNetwork("/home/heiko/src/sequoia-wot/tests/data/best-via-root.pgp")
val q1 = Query(n1, Roots(), false)
val a1 = q1.backwardPropagate(target_fpr, target_uid, false, IdempotentCertificationFilter());
val a1 = q1.backwardPropagate(target_fpr, target_uid, IdempotentCertificationFilter());
checkResult(a1[bob_fpr]!!, 9, 120, listOf(bob_fpr, carol_fpr, target_fpr));
checkResult(a1[carol_fpr]!!, 10, 120, listOf(carol_fpr, target_fpr));
checkResult(a1[alice_fpr]!!, 8, 120, listOf(alice_fpr, bob_fpr, carol_fpr, target_fpr));
val a2 = q1.backwardPropagate(target_fpr, target_uid, false, IdempotentCertificationFilter());
val a2 = q1.backwardPropagate(target_fpr, target_uid, IdempotentCertificationFilter());
checkResult(a2[alice_fpr]!!, 8, 120, listOf(alice_fpr, bob_fpr, carol_fpr, target_fpr));
checkResult(a2[bob_fpr]!!, 9, 120, listOf(bob_fpr, carol_fpr, target_fpr));
@ -472,7 +475,7 @@ class BackPropagationTest {
// Again, but this time we specify the roots.
val q2 = Query(n1, Roots(listOf(Root(alice_fpr, 120))), false)
val a3 = q2.backwardPropagate(target_fpr, target_uid, false, IdempotentCertificationFilter());
val a3 = q2.backwardPropagate(target_fpr, target_uid, IdempotentCertificationFilter());
checkResult(a3[alice_fpr]!!, 8, 120, listOf(alice_fpr, bob_fpr, carol_fpr, target_fpr));
@ -484,7 +487,7 @@ class BackPropagationTest {
Root(alice_fpr, 120),
Root(bob_fpr, 120))),
false)
val a4 = q3.backwardPropagate(target_fpr, target_uid, false, IdempotentCertificationFilter());
val a4 = q3.backwardPropagate(target_fpr, target_uid, IdempotentCertificationFilter());
checkResult(a4[bob_fpr]!!, 9, 120, listOf(bob_fpr, carol_fpr, target_fpr));
checkResult(a4[alice_fpr]!!, 8, 50, listOf(alice_fpr, yellow_fpr, zebra_fpr, target_fpr));
@ -520,23 +523,23 @@ class BackPropagationTest {
val q1 = Query(n1, Roots(), false)
// alice as root.
val a1 = q1.backwardPropagate(bob_fpr, bob_uid, false, IdempotentCertificationFilter());
val a1 = q1.backwardPropagate(bob_fpr, bob_uid, IdempotentCertificationFilter());
checkResult(a1[alice_fpr]!!, 3, 100, listOf(alice_fpr, bob_fpr));
val a2 = q1.backwardPropagate(carol_fpr, carol_uid, false, IdempotentCertificationFilter());
val a2 = q1.backwardPropagate(carol_fpr, carol_uid, IdempotentCertificationFilter());
checkResult(a2[alice_fpr]!!, 1, 100, listOf(alice_fpr, bob_fpr, carol_fpr));
val a3 = q1.backwardPropagate(dave_fpr, dave_uid, false, IdempotentCertificationFilter());
val a3 = q1.backwardPropagate(dave_fpr, dave_uid, IdempotentCertificationFilter());
// There is no path, because dave@example.org does not match
// the constraint on bob (domain: example.org).
assert(a3[alice_fpr] == null)
val a4 = q1.backwardPropagate(ed_fpr, ed_uid, false, IdempotentCertificationFilter())
val a4 = q1.backwardPropagate(ed_fpr, ed_uid, IdempotentCertificationFilter())
// There is no path, because ed@example.org does not match
// the constraint on dave (domain: other.org).
assert(a4[alice_fpr] == null)
val a5 = q1.backwardPropagate(frank_fpr, frank_uid, false, IdempotentCertificationFilter())
val a5 = q1.backwardPropagate(frank_fpr, frank_uid, IdempotentCertificationFilter())
// There is no path, because frank@other.org does not match
// the constraint on bob (domain: example.org).
@ -544,27 +547,27 @@ class BackPropagationTest {
// bob as root.
val a6 = q1.backwardPropagate(carol_fpr, carol_uid, false, IdempotentCertificationFilter())
val a6 = q1.backwardPropagate(carol_fpr, carol_uid, IdempotentCertificationFilter())
checkResult(a6[bob_fpr]!!, 1, 100, listOf(bob_fpr, carol_fpr))
val a7 = q1.backwardPropagate(dave_fpr, dave_uid, false, IdempotentCertificationFilter())
val a7 = q1.backwardPropagate(dave_fpr, dave_uid, IdempotentCertificationFilter())
checkResult(a7[bob_fpr]!!, 1, 100, listOf(bob_fpr, dave_fpr))
val a8 = q1.backwardPropagate(ed_fpr, ed_uid, false, IdempotentCertificationFilter())
val a8 = q1.backwardPropagate(ed_fpr, ed_uid, IdempotentCertificationFilter())
// There is no path, because ed@example.org does not match
// the constraint on dave (domain: other.org).
assert(a8[bob_fpr] == null)
val a9 = q1.backwardPropagate(frank_fpr, frank_uid, false, IdempotentCertificationFilter())
val a9 = q1.backwardPropagate(frank_fpr, frank_uid, IdempotentCertificationFilter())
checkResult(a9[bob_fpr]!!, 0, 100, listOf(bob_fpr, dave_fpr, frank_fpr))
// dave as root.
val a10 = q1.backwardPropagate(ed_fpr, ed_uid, false, IdempotentCertificationFilter())
val a10 = q1.backwardPropagate(ed_fpr, ed_uid, IdempotentCertificationFilter())
checkResult(a10[dave_fpr]!!, 1, 100, listOf(dave_fpr, ed_fpr));
val a11 = q1.backwardPropagate(frank_fpr, frank_uid, false, IdempotentCertificationFilter())
val a11 = q1.backwardPropagate(frank_fpr, frank_uid, IdempotentCertificationFilter())
checkResult(a11[dave_fpr]!!, 1, 100, listOf(dave_fpr, frank_fpr))
}
@ -594,40 +597,40 @@ class BackPropagationTest {
val q1 = Query(n1, Roots(), false)
val a1 = q1.backwardPropagate(bob_fpr, bob_uid, false, IdempotentCertificationFilter())
val a1 = q1.backwardPropagate(bob_fpr, bob_uid, IdempotentCertificationFilter())
checkResult(a1[alice_fpr]!!, 7, 100, listOf(alice_fpr, bob_fpr))
val a2 = q1.backwardPropagate(carol_fpr, carol_uid, false, IdempotentCertificationFilter())
val a2 = q1.backwardPropagate(carol_fpr, carol_uid, IdempotentCertificationFilter())
// There is no path, because carol@other.org does not match
// the constraint on carol (domain: example.org).
assert(a2[alice_fpr] == null)
val a3 = q1.backwardPropagate(dave_fpr, dave_uid, false, IdempotentCertificationFilter())
val a3 = q1.backwardPropagate(dave_fpr, dave_uid, IdempotentCertificationFilter())
// There is no path, because dave@their.org does not match
// the constraint on carol (domain: example.org).
assert(a3[alice_fpr] == null)
val a4 = q1.backwardPropagate(ed_fpr, ed_uid, false, IdempotentCertificationFilter())
val a4 = q1.backwardPropagate(ed_fpr, ed_uid, IdempotentCertificationFilter())
checkResult(a4[alice_fpr]!!, 4, 100, listOf(alice_fpr, bob_fpr, carol_fpr, dave_fpr, ed_fpr))
val a5 = q1.backwardPropagate(carol_fpr, carol_uid, false, IdempotentCertificationFilter());
val a5 = q1.backwardPropagate(carol_fpr, carol_uid, IdempotentCertificationFilter());
// There is no path, because carol@other.org does not match
// the constraint on carol (domain: example.org).
assert(a5[bob_fpr] == null)
val a6 = q1.backwardPropagate(dave_fpr, dave_uid, false, IdempotentCertificationFilter())
val a6 = q1.backwardPropagate(dave_fpr, dave_uid, IdempotentCertificationFilter())
// There is no path, because dave@their.org does not match
// the constraint on carol (domain: example.org).
assert(a6[bob_fpr] == null)
val a7 = q1.backwardPropagate(ed_fpr, ed_uid, false, IdempotentCertificationFilter())
val a7 = q1.backwardPropagate(ed_fpr, ed_uid, IdempotentCertificationFilter())
checkResult(a7[bob_fpr]!!, 5, 100, listOf(bob_fpr, carol_fpr, dave_fpr, ed_fpr))
val a8 = q1.backwardPropagate(dave_fpr, dave_uid, false, IdempotentCertificationFilter())
val a8 = q1.backwardPropagate(dave_fpr, dave_uid, IdempotentCertificationFilter())
checkResult(a8[carol_fpr]!!, 7, 100, listOf(carol_fpr, dave_fpr));
val a9 = q1.backwardPropagate(ed_fpr, ed_uid, false, IdempotentCertificationFilter())
val a9 = q1.backwardPropagate(ed_fpr, ed_uid, IdempotentCertificationFilter())
checkResult(a9[carol_fpr]!!, 6, 100, listOf(carol_fpr, dave_fpr, ed_fpr))
}
@ -670,60 +673,60 @@ class BackPropagationTest {
// alice as root.
val a1 = q1.backwardPropagate(bob_fpr, bob_uid, false, IdempotentCertificationFilter())
val a1 = q1.backwardPropagate(bob_fpr, bob_uid, IdempotentCertificationFilter())
checkResult(a1[alice_fpr]!!, 3, 100, listOf(alice_fpr, bob_fpr))
val a2 = q1.backwardPropagate(carol_fpr, carol_uid, false, IdempotentCertificationFilter())
val a2 = q1.backwardPropagate(carol_fpr, carol_uid, IdempotentCertificationFilter())
checkResult(a2[alice_fpr]!!, 1, 100, listOf(alice_fpr, bob_fpr, carol_fpr))
val a3 = q1.backwardPropagate(dave_fpr, dave_uid, false, IdempotentCertificationFilter())
val a3 = q1.backwardPropagate(dave_fpr, dave_uid, IdempotentCertificationFilter())
checkResult(a3[alice_fpr]!!, 1, 100, listOf(alice_fpr, bob_fpr, dave_fpr))
val a4 = q1.backwardPropagate(ed_fpr, ed_uid, false, IdempotentCertificationFilter())
val a4 = q1.backwardPropagate(ed_fpr, ed_uid, IdempotentCertificationFilter())
// There is no path, because ed@example.org does not match
// the constraint on dave (domain: other.org).
assert(a4[alice_fpr] == null)
val a5 = q1.backwardPropagate(frank_fpr, frank_uid, false, IdempotentCertificationFilter())
val a5 = q1.backwardPropagate(frank_fpr, frank_uid, IdempotentCertificationFilter())
checkResult(a5[alice_fpr]!!, 0, 100, listOf(alice_fpr, bob_fpr, dave_fpr, frank_fpr))
val a6 = q1.backwardPropagate(george_fpr, george_uid, false, IdempotentCertificationFilter())
val a6 = q1.backwardPropagate(george_fpr, george_uid, IdempotentCertificationFilter())
assert(a6[alice_fpr] == null)
val a7 = q1.backwardPropagate(henry_fpr, henry_uid, false, IdempotentCertificationFilter())
val a7 = q1.backwardPropagate(henry_fpr, henry_uid, IdempotentCertificationFilter())
assert(a7[alice_fpr] == null)
// bob as root.
val a8 = q1.backwardPropagate(carol_fpr, carol_uid, false, IdempotentCertificationFilter())
val a8 = q1.backwardPropagate(carol_fpr, carol_uid, IdempotentCertificationFilter())
checkResult(a8[bob_fpr]!!, 1, 100, listOf(bob_fpr, carol_fpr))
val a9 = q1.backwardPropagate(dave_fpr, dave_uid, false, IdempotentCertificationFilter())
val a9 = q1.backwardPropagate(dave_fpr, dave_uid, IdempotentCertificationFilter())
checkResult(a9[bob_fpr]!!, 1, 100, listOf(bob_fpr, dave_fpr))
val a10 = q1.backwardPropagate(ed_fpr, ed_uid, false, IdempotentCertificationFilter())
val a10 = q1.backwardPropagate(ed_fpr, ed_uid, IdempotentCertificationFilter())
// There is no path, because ed@example.org does not match
// the constraint on dave (domain: other.org).
assert(a10[bob_fpr] == null)
val a11 = q1.backwardPropagate(frank_fpr, frank_uid, false, IdempotentCertificationFilter())
val a11 = q1.backwardPropagate(frank_fpr, frank_uid, IdempotentCertificationFilter())
checkResult(a11[bob_fpr]!!, 0, 100, listOf(bob_fpr, dave_fpr, frank_fpr))
val a12 = q1.backwardPropagate(george_fpr, george_uid, false, IdempotentCertificationFilter())
val a12 = q1.backwardPropagate(george_fpr, george_uid, IdempotentCertificationFilter())
checkResult(a12[bob_fpr]!!, 0, 100, listOf(bob_fpr, dave_fpr, george_fpr))
val a13 = q1.backwardPropagate(henry_fpr, henry_uid, false, IdempotentCertificationFilter())
val a13 = q1.backwardPropagate(henry_fpr, henry_uid, IdempotentCertificationFilter())
checkResult(a13[bob_fpr]!!, 1, 100, listOf(bob_fpr, henry_fpr))
// dave as root.
val a14 = q1.backwardPropagate(ed_fpr, ed_uid, false, IdempotentCertificationFilter())
val a14 = q1.backwardPropagate(ed_fpr, ed_uid, IdempotentCertificationFilter())
checkResult(a14[dave_fpr]!!, 1, 100, listOf(dave_fpr, ed_fpr))
val a15 = q1.backwardPropagate(frank_fpr, frank_uid, false, IdempotentCertificationFilter())
val a15 = q1.backwardPropagate(frank_fpr, frank_uid, IdempotentCertificationFilter())
checkResult(a15[dave_fpr]!!, 1, 100, listOf(dave_fpr, frank_fpr))
val a16 = q1.backwardPropagate(george_fpr, george_uid, false, IdempotentCertificationFilter())
val a16 = q1.backwardPropagate(george_fpr, george_uid, IdempotentCertificationFilter())
checkResult(a16[dave_fpr]!!, 1, 100, listOf(dave_fpr, george_fpr))
}
@ -753,10 +756,10 @@ class BackPropagationTest {
val q1 = Query(n1, Roots(), false)
val a1 = q1.backwardPropagate(carol_fpr, carol_uid, false, IdempotentCertificationFilter())
val a1 = q1.backwardPropagate(carol_fpr, carol_uid, IdempotentCertificationFilter())
checkResult(a1[alice_fpr]!!, 0, 70, listOf(alice_fpr, bob_fpr, carol_fpr))
val a2 = q1.backwardPropagate(dave_fpr, dave_uid, false, IdempotentCertificationFilter())
val a2 = q1.backwardPropagate(dave_fpr, dave_uid, IdempotentCertificationFilter())
checkResult(a2[alice_fpr]!!, 0, 50, listOf(alice_fpr, bob_fpr, carol_fpr, dave_fpr))
}
@ -792,22 +795,22 @@ class BackPropagationTest {
val q1 = Query(n1, Roots(), false)
val a1 = q1.backwardPropagate(bob_fpr, bob_uid, false, IdempotentCertificationFilter())
val a1 = q1.backwardPropagate(bob_fpr, bob_uid, IdempotentCertificationFilter())
checkResult(a1[alice_fpr]!!, DEPTH_UNCONSTRAINED, 70, listOf(alice_fpr, bob_fpr))
val a2 = q1.backwardPropagate(bob_fpr, bob_some_org_uid, false, IdempotentCertificationFilter())
val a2 = q1.backwardPropagate(bob_fpr, bob_some_org_uid, IdempotentCertificationFilter())
checkResult(a2[alice_fpr]!!, 1, 50, listOf(alice_fpr, bob_fpr))
val a3 = q1.backwardPropagate(carol_fpr, carol_uid, false, IdempotentCertificationFilter())
val a3 = q1.backwardPropagate(carol_fpr, carol_uid, IdempotentCertificationFilter())
checkResult(a3[alice_fpr]!!, 0, 50, listOf(alice_fpr, bob_fpr, carol_fpr))
val a4 = q1.backwardPropagate(dave_fpr, dave_uid, false, IdempotentCertificationFilter())
val a4 = q1.backwardPropagate(dave_fpr, dave_uid, IdempotentCertificationFilter())
checkResult(a4[alice_fpr]!!, 0, 70, listOf(alice_fpr, bob_fpr, carol_fpr, dave_fpr))
val a5 = q1.backwardPropagate(ed_fpr, ed_uid, false, IdempotentCertificationFilter())
val a5 = q1.backwardPropagate(ed_fpr, ed_uid, IdempotentCertificationFilter())
assert(a5[alice_fpr] == null)
val a6 = q1.backwardPropagate(frank_fpr, frank_uid, false, IdempotentCertificationFilter())
val a6 = q1.backwardPropagate(frank_fpr, frank_uid, IdempotentCertificationFilter())
checkResult(a6[alice_fpr]!!, 0, 70, listOf(alice_fpr, bob_fpr, frank_fpr))
}
@ -837,10 +840,10 @@ class BackPropagationTest {
val q1 = Query(n1, Roots(), false)
val a1 = q1.backwardPropagate(carol_fpr, carol_uid, false, IdempotentCertificationFilter())
val a1 = q1.backwardPropagate(carol_fpr, carol_uid, IdempotentCertificationFilter())
checkResult(a1[alice_fpr]!!, 0, 70, listOf(alice_fpr, bob_fpr, carol_fpr))
val a2 = q1.backwardPropagate(dave_fpr, dave_uid, false, IdempotentCertificationFilter())
val a2 = q1.backwardPropagate(dave_fpr, dave_uid, IdempotentCertificationFilter())
checkResult(a2[alice_fpr]!!, 0, 50, listOf(alice_fpr, bob_fpr, carol_fpr, dave_fpr))
}
@ -878,7 +881,7 @@ class BackPropagationTest {
val q1 = Query(n1, Roots(), false)
val auth = q1.backwardPropagate(frank_fpr, frank_uid, false, IdempotentCertificationFilter())
val auth = q1.backwardPropagate(frank_fpr, frank_uid, IdempotentCertificationFilter())
checkResult(auth[alice_fpr]!!, 0, 20, listOf(alice_fpr, bob_fpr, carol_fpr, frank_fpr))
}

View file

@ -114,10 +114,7 @@ class Query(
// remain)
var progress = true
// On this iteration approach
// [https://gitlab.com/sequoia-pgp/sequoia-wot/-/commit/ff006688155aaa3ee0c14b88bef1a143b0ecae23]
// On iteration/looping:
//
// "Better mimic GnuPG's trust root semantics
//
@ -127,60 +124,57 @@ class Query(
// considered a trust root, because he is certified by Alice.
//
// In other words, we need to iterate."
nextPath@ while (progress && paths.amount < targetTrustAmount) {
//
// https://gitlab.com/sequoia-pgp/sequoia-wot/-/commit/ff006688155aaa3ee0c14b88bef1a143b0ecae23
var progress = true
while (progress && paths.amount < targetTrustAmount) {
progress = false
for (selfSigned in listOf(true, false)) {
val authPaths = backwardPropagate(targetFpr, targetUserid, selfSigned, filters)
val authPaths = backwardPropagate(targetFpr, targetUserid, filters)
// The paths returned by backward_propagate may overlap.
// So we only use one (picking one of the best, by trust and length).
//
// Then we subtract the path from the network and run backward_propagate
// again, if we haven't yet reached 'targetTrustAmount'.
val bestPath = roots.fingerprints()
.mapNotNull { authPaths[it] } // Only consider paths that start at a root.
.maxWithOrNull(compareBy(
// We want the *most* amount of trust,
{ it.second }, // path amount
// but the *shortest* path.
{ -it.first.length }, // -path.len
// Be predictable. Break ties based on the fingerprint of the root.
{ it.first.root.fingerprint })
)
// The paths returned by backward_propagate may overlap.
// So we only use one (picking one of the best, by trust and length).
//
// Then we subtract the path from the network and run backward_propagate
// again, if we haven't yet reached 'targetTrustAmount'.
val bestPath = roots.fingerprints()
.mapNotNull { authPaths[it] } // Only consider paths that start at a root.
.maxWithOrNull(compareBy(
// We want the *most* amount of trust,
{ it.second }, // path amount
// but the *shortest* path.
{ -it.first.length }, // -path.len
// Be predictable. Break ties based on the fingerprint of the root.
{ it.first.root.fingerprint })
)
if (bestPath != null) {
val (path, amount) = bestPath
if (bestPath != null) {
val (path, amount) = bestPath
if (path.length == 1) {
// This path is a root.
//
// We've used 'amount' of trust from this root, so we'll detract that amount
// from that root, with a filter.
val suppress = SuppressIssuerFilter()
suppress.suppressIssuer(path.root.fingerprint, amount)
filters.add(suppress)
} else {
// Add the path to the filter to create a residual
// network without this path.
val suppress = SuppressCertificationFilter()
suppress.suppressPath(path, amount)
filters.add(suppress)
}
paths.add(path, amount)
progress = true
// Prefer paths where the target User ID is self-signed as long as possible.
continue@nextPath
if (path.length == 1) {
// This path is a root.
//
// We've used 'amount' of trust from this root, so we'll suppress
// that amount from it.
val suppress = SuppressIssuerFilter()
suppress.suppressIssuer(path.root.fingerprint, amount)
filters.add(suppress)
} else {
// We create a residual network by suppressing this path.
val suppress = SuppressCertificationFilter()
suppress.suppressPath(path, amount)
filters.add(suppress)
}
paths.add(path, amount)
progress = true
}
}
return paths
}
/**
* Finds a path in the network from one or multiple `roots` that
* authenticates the target binding.
@ -188,13 +182,29 @@ class Query(
* If `roots` is empty, authenticated paths starting from any node
* are returned.
*
*
* Does one backwards propagation run. By default, always with self-sig 'true'.
* Repeats the call with 'false', if 'true' returns no results.
*
* Note: the algorithm in backwardPropagateInternal() prefers shorter paths
* to longer paths. So the returned path(s) may not be optimal in terms of the amount of trust.
* To compensate for this, the caller should run the algorithm again on
* a residual network.
*/
private fun backwardPropagate(targetFpr: Fingerprint, targetUserid: String, filter: CertificationFilter): HashMap<Fingerprint, Pair<Path, Int>> {
// Prefer paths where the target User ID is self-signed as long as possible. (But .. Why?)
val authPaths = backwardPropagateInternal(targetFpr, targetUserid, true, filter)
if (authPaths.isNotEmpty()) return authPaths
// If we find no "self-signed" paths, return any others
return backwardPropagateInternal(targetFpr, targetUserid, false, filter)
}
/**
* Implements the algorithm outlined in:
* https://gitlab.com/sequoia-pgp/sequoia-wot/-/blob/main/spec/sequoia-wot.md#implementation-strategy
*
* Note: the algorithm prefers shorter paths to longer paths. So the
* returned path(s) may not be optimal in terms of the amount of trust.
* To compensate for this, the caller should run the algorithm again on
* a residual network.
*
* `selfSigned` picks between two variants of this algorithm. Each of the
* modes finds a distinct subset of authenticated paths:
@ -206,10 +216,10 @@ class Query(
* - If `false`, this function only finds paths that don't use
* a self-certification as the last edge.
*/
private fun backwardPropagate(targetFpr: Fingerprint,
targetUserid: String,
selfSigned: Boolean,
filter: CertificationFilter)
private fun backwardPropagateInternal(targetFpr: Fingerprint,
targetUserid: String,
selfSigned: Boolean,
filter: CertificationFilter)
: HashMap<Fingerprint, Pair<Path, Int>> {
logger.debug("Query.backward_propagate")