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e2ee_test.go
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e2ee_test.go
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package e2ee
import (
"testing"
"github.com/stretchr/testify/assert"
)
var version = "test"
func TestE2EEVersion(t *testing.T) {
alice := newE2EE(version)
assert.NotNil(t, alice.getVersion())
}
func TestE2EE(t *testing.T) {
version := "dev"
aliceConnectionID := "ALICE---------------------"
alice := newE2EE(version)
alice.init()
assert.Equal(t, len(alice.secretKeyMaterial), 32)
alice.start(aliceConnectionID)
// 最初なので 0
assert.Equal(t, uint32(0), alice.keyID)
assert.NotNil(t, alice.selfFingerprint())
assert.Empty(t, alice.remoteFingerprints())
bobConnectionID := "BOB-----------------------"
bob := newE2EE(version)
bob.init()
assert.Equal(t, len(bob.secretKeyMaterial), 32)
bob.start(bobConnectionID)
// 最初なので 0
assert.Equal(t, uint32(0), bob.keyID)
assert.NotNil(t, bob.selfFingerprint())
assert.Empty(t, bob.remoteFingerprints())
result, err := alice.startSession(bobConnectionID, bob.selfPreKeyBundle.identityKey, bob.selfPreKeyBundle.signedPreKey[:], bob.selfPreKeyBundle.preKeySignature)
assert.Nil(t, err)
assert.NotEmpty(t, alice.remoteFingerprints())
assert.Equal(t, 1, len(alice.remoteFingerprints()))
// 新しく参加者が来たので sender の alice は keyId++ する
assert.Equal(t, 2, len(result.messages))
assert.Equal(t, uint32(1), result.selfKeyID)
assert.Equal(t, aliceConnectionID, result.selfConnectionID)
assert.Equal(t, uint32(1), alice.keyID)
// まだ SK と keyID を相手からもらっていない
_, ok := result.remoteSecretKeyMaterials[bobConnectionID]
assert.False(t, ok)
err = bob.addPreKeyBundle(aliceConnectionID, alice.selfPreKeyBundle.identityKey, alice.selfPreKeyBundle.signedPreKey[:], alice.selfPreKeyBundle.preKeySignature)
assert.Nil(t, err)
assert.NotEmpty(t, bob.remoteFingerprints())
assert.Equal(t, 1, len(bob.remoteFingerprints()))
r0, err := bob.receiveMessage(result.messages[0])
assert.Nil(t, err)
assert.Equal(t, 0, len(r0.remoteSecretKeyMaterials))
assert.Equal(t, 0, len(r0.messages))
// bob は reciever なので keyId++ しない
assert.Equal(t, uint32(0), bob.keyID)
// bob はまだ alice から sk をもらっていない
_, ok = r0.remoteSecretKeyMaterials[aliceConnectionID]
assert.False(t, ok)
assert.Equal(t, alice.sessions[bobConnectionID].rootKey, bob.sessions[aliceConnectionID].rootKey)
r1, err := bob.receiveMessage(result.messages[1])
assert.Nil(t, err)
assert.Equal(t, 1, len(r1.remoteSecretKeyMaterials))
assert.Equal(t, 1, len(r1.messages))
assert.Equal(t, uint32(0), bob.keyID)
// alice の keyID は bob が参加したことにより sk が ratchet してるので 1
assert.Equal(t, uint32(1), r1.remoteSecretKeyMaterials[aliceConnectionID].keyID)
r2, err := alice.receiveMessage(r1.messages[0])
assert.Nil(t, err)
assert.Equal(t, 1, len(r2.remoteSecretKeyMaterials))
assert.Equal(t, 0, len(r2.messages))
assert.Equal(t, uint32(1), alice.keyID)
// bob は新規参加者なので sk を ratchet してないので keyID は 0 のまま
assert.Equal(t, uint32(0), r2.remoteSecretKeyMaterials[bobConnectionID].keyID)
assert.Equal(t, bob.secretKeyMaterial, r2.remoteSecretKeyMaterials[bobConnectionID].secretKeyMaterial)
assert.Equal(t, bob.secretKeyMaterial, alice.sessions[bobConnectionID].remoteSecretKeyMaterial)
assert.Equal(t, uint32(1), alice.keyID)
assert.Equal(t, uint32(0), alice.sessions[bobConnectionID].remoteKeyID)
// Carol を登場させる
carolConnectionID := "CAROL---------------------"
carol := newE2EE(version)
carol.init()
carol.start(carolConnectionID)
err = carol.addPreKeyBundle(aliceConnectionID, alice.selfPreKeyBundle.identityKey, alice.selfPreKeyBundle.signedPreKey[:], alice.selfPreKeyBundle.preKeySignature)
assert.Nil(t, err)
err = carol.addPreKeyBundle(bobConnectionID, bob.selfPreKeyBundle.identityKey, bob.selfPreKeyBundle.signedPreKey[:], bob.selfPreKeyBundle.preKeySignature)
assert.Nil(t, err)
assert.Equal(t, 2, len(carol.remoteFingerprints()))
r3, err := alice.startSession(carolConnectionID, carol.selfPreKeyBundle.identityKey, carol.selfPreKeyBundle.signedPreKey[:], carol.selfPreKeyBundle.preKeySignature)
assert.Nil(t, err)
assert.Equal(t, 2, len(alice.remoteFingerprints()))
assert.Equal(t, 2, len(r3.messages))
assert.Equal(t, aliceConnectionID, r3.selfConnectionID)
// carol がきたので key を ratchet したので 2 へ
assert.Equal(t, uint32(2), alice.keyID)
r4, err := carol.receiveMessage(r3.messages[0])
assert.Nil(t, err)
assert.Equal(t, 0, len(r4.messages))
// carol は新規参加者なので key は 0 のまま
assert.Equal(t, uint32(0), carol.keyID)
r5, err := carol.receiveMessage(r3.messages[1])
assert.Nil(t, err)
assert.Equal(t, 1, len(r5.messages))
// carol は新規参加者なので key は 0 のまま
assert.Equal(t, uint32(0), carol.keyID)
r6, err := bob.startSession(carolConnectionID, carol.selfPreKeyBundle.identityKey, carol.selfPreKeyBundle.signedPreKey[:], carol.selfPreKeyBundle.preKeySignature)
assert.Nil(t, err)
assert.Equal(t, 2, len(bob.remoteFingerprints()))
assert.Equal(t, bobConnectionID, r6.selfConnectionID)
// 新規参加者がきたので鍵を ratchet した
assert.Equal(t, uint32(1), bob.keyID)
r7, err := carol.receiveMessage(r6.messages[0])
assert.Nil(t, err)
assert.Equal(t, 0, len(r7.messages))
assert.Equal(t, uint32(0), carol.keyID)
r8, err := carol.receiveMessage(r6.messages[1])
assert.Nil(t, err)
assert.Equal(t, 1, len(r8.messages))
assert.Equal(t, uint32(0), carol.keyID)
r9, err := alice.receiveMessage(r5.messages[0])
assert.Nil(t, err)
assert.Equal(t, 0, len(r9.messages))
assert.Equal(t, uint32(2), alice.keyID)
r10, err := bob.receiveMessage(r8.messages[0])
assert.Nil(t, err)
assert.Equal(t, 0, len(r10.messages))
assert.Equal(t, uint32(1), bob.keyID)
assert.Equal(t, alice.secretKeyMaterial, bob.sessions[aliceConnectionID].remoteSecretKeyMaterial)
assert.Equal(t, alice.secretKeyMaterial, carol.sessions[aliceConnectionID].remoteSecretKeyMaterial)
assert.Equal(t, bob.secretKeyMaterial, alice.sessions[bobConnectionID].remoteSecretKeyMaterial)
assert.Equal(t, bob.secretKeyMaterial, carol.sessions[bobConnectionID].remoteSecretKeyMaterial)
assert.Equal(t, carol.secretKeyMaterial, alice.sessions[carolConnectionID].remoteSecretKeyMaterial)
assert.Equal(t, carol.secretKeyMaterial, bob.sessions[carolConnectionID].remoteSecretKeyMaterial)
r11, err := alice.stopSession(carolConnectionID)
assert.Nil(t, err)
assert.Equal(t, 1, len(alice.remoteFingerprints()))
assert.Equal(t, 1, len(r11.messages))
assert.Equal(t, aliceConnectionID, r11.selfConnectionID)
assert.Equal(t, uint32(3), alice.keyID)
assert.Equal(t, uint32(3), r11.selfKeyID)
r12, err := bob.stopSession(carolConnectionID)
assert.Nil(t, err)
assert.Equal(t, 1, len(bob.remoteFingerprints()))
assert.Equal(t, 1, len(r12.messages))
assert.Equal(t, bobConnectionID, r12.selfConnectionID)
assert.Equal(t, uint32(2), bob.keyID)
assert.Equal(t, uint32(2), r12.selfKeyID)
r13, err := alice.receiveMessage(r12.messages[0])
assert.Nil(t, err)
assert.Equal(t, 0, len(r13.messages))
r14, err := bob.receiveMessage(r11.messages[0])
assert.Nil(t, err)
assert.Equal(t, 0, len(r14.messages))
assert.Equal(t, uint32(2), alice.sessions[bobConnectionID].remoteKeyID)
assert.Equal(t, uint32(3), bob.sessions[aliceConnectionID].remoteKeyID)
assert.Equal(t, alice.secretKeyMaterial, bob.sessions[aliceConnectionID].remoteSecretKeyMaterial)
assert.Equal(t, bob.secretKeyMaterial, alice.sessions[bobConnectionID].remoteSecretKeyMaterial)
}