func generateSerialRequestAssertion() (string, error) {
	privateKey, err := generatePrivateKey()
	if err != nil {
		return "", err
	}
	encodedPubKey, err := asserts.EncodePublicKey(privateKey.PublicKey())
	if err != nil {
		return "", err
	}

	// Generate a request-id
	r, _ := getRequestID()

	headers := map[string]interface{}{
		"brand-id":   request.Brand,
		"device-key": string(encodedPubKey),
		"request-id": r,
		"model":      request.Model,
		"serial":     request.SerialNumber,
	}

	sreq, err := asserts.SignWithoutAuthority(asserts.SerialRequestType, headers, []byte(""), privateKey)
	if err != nil {
		return "", err
	}

	assertSR := asserts.Encode(sreq)
	return string(assertSR), nil
}
Exemplo n.º 2
0
func (dbs *databaseSuite) TestPublicKey(c *C) {
	pk := testPrivKey1
	keyID := pk.PublicKey().ID()
	err := dbs.db.ImportKey(pk)
	c.Assert(err, IsNil)

	pubk, err := dbs.db.PublicKey(keyID)
	c.Assert(err, IsNil)
	c.Check(pubk.ID(), Equals, keyID)

	// usual pattern is to then encode it
	encoded, err := asserts.EncodePublicKey(pubk)
	c.Assert(err, IsNil)
	data, err := base64.StdEncoding.DecodeString(string(encoded))
	c.Assert(err, IsNil)
	c.Check(data[0], Equals, uint8(1)) // v1

	// check details of packet
	const newHeaderBits = 0x80 | 0x40
	c.Check(data[1]&newHeaderBits, Equals, uint8(newHeaderBits))
	c.Check(data[2] < 192, Equals, true) // small packet, 1 byte length
	c.Check(data[3], Equals, uint8(4))   // openpgp v4
	pkt, err := packet.Read(bytes.NewBuffer(data[1:]))
	c.Assert(err, IsNil)
	pubKey, ok := pkt.(*packet.PublicKey)
	c.Assert(ok, Equals, true)
	c.Check(pubKey.PubKeyAlgo, Equals, packet.PubKeyAlgoRSA)
	c.Check(pubKey.IsSubkey, Equals, false)
	fixedTimestamp := time.Date(2016, time.January, 1, 0, 0, 0, 0, time.UTC)
	c.Check(pubKey.CreationTime.Equal(fixedTimestamp), Equals, true)
	// hash of blob content == hash of key
	h384 := sha3.Sum384(data)
	encHash := base64.RawURLEncoding.EncodeToString(h384[:])
	c.Check(encHash, DeepEquals, testPrivKey1SHA3_384)
}
Exemplo n.º 3
0
func (aks *accountKeySuite) TestAccountKeyCheckNameClash(c *C) {
	trustedKey := testPrivKey0

	headers := map[string]interface{}{
		"authority-id":        "canonical",
		"account-id":          "acc-id1",
		"name":                "default",
		"public-key-sha3-384": aks.keyID,
		"since":               aks.since.Format(time.RFC3339),
		"until":               aks.until.Format(time.RFC3339),
	}
	accKey, err := asserts.AssembleAndSignInTest(asserts.AccountKeyType, headers, []byte(aks.pubKeyBody), trustedKey)
	c.Assert(err, IsNil)

	db := aks.openDB(c)
	aks.prereqAccount(c, db)

	err = db.Add(accKey)
	c.Assert(err, IsNil)

	newPrivKey, _ := assertstest.GenerateKey(752)
	err = db.ImportKey(newPrivKey)
	c.Assert(err, IsNil)
	newPubKey, err := db.PublicKey(newPrivKey.PublicKey().ID())
	c.Assert(err, IsNil)
	newPubKeyEncoded, err := asserts.EncodePublicKey(newPubKey)

	headers["public-key-sha3-384"] = newPubKey.ID()
	headers["revision"] = "1"
	newAccKey, err := asserts.AssembleAndSignInTest(asserts.AccountKeyType, headers, newPubKeyEncoded, trustedKey)
	c.Assert(err, IsNil)

	err = db.Check(newAccKey)
	c.Assert(err, ErrorMatches, fmt.Sprintf(`account-key assertion for "acc-id1" with ID %q has the same name "default" as existing ID %q`, newPubKey.ID(), aks.keyID))
}
Exemplo n.º 4
0
func (aks *accountKeySuite) TestAccountKeyCheckSameAccountAndDifferentName(c *C) {
	trustedKey := testPrivKey0

	headers := map[string]interface{}{
		"authority-id":        "canonical",
		"account-id":          "acc-id1",
		"name":                "default",
		"public-key-sha3-384": aks.keyID,
		"since":               aks.since.Format(time.RFC3339),
		"until":               aks.until.Format(time.RFC3339),
	}
	accKey, err := asserts.AssembleAndSignInTest(asserts.AccountKeyType, headers, []byte(aks.pubKeyBody), trustedKey)
	c.Assert(err, IsNil)

	db := aks.openDB(c)
	aks.prereqAccount(c, db)

	err = db.Add(accKey)
	c.Assert(err, IsNil)

	newPrivKey, _ := assertstest.GenerateKey(752)
	err = db.ImportKey(newPrivKey)
	c.Assert(err, IsNil)
	newPubKey, err := db.PublicKey(newPrivKey.PublicKey().ID())
	c.Assert(err, IsNil)
	newPubKeyEncoded, err := asserts.EncodePublicKey(newPubKey)

	headers["name"] = "another"
	headers["public-key-sha3-384"] = newPubKey.ID()
	newAccKey, err := asserts.AssembleAndSignInTest(asserts.AccountKeyType, headers, newPubKeyEncoded, trustedKey)
	c.Assert(err, IsNil)

	err = db.Check(newAccKey)
	c.Assert(err, IsNil)
}
Exemplo n.º 5
0
func (ss *serialSuite) SetUpSuite(c *C) {
	ss.ts = time.Now().Truncate(time.Second).UTC()
	ss.tsLine = "timestamp: " + ss.ts.Format(time.RFC3339) + "\n"

	ss.deviceKey = testPrivKey2
	encodedPubKey, err := asserts.EncodePublicKey(ss.deviceKey.PublicKey())
	c.Assert(err, IsNil)
	ss.encodedDevKey = string(encodedPubKey)
}
Exemplo n.º 6
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func prepareSerialRequest(t *state.Task, privKey asserts.PrivateKey, device *auth.DeviceState, client *http.Client, cfg *serialRequestConfig) (string, error) {
	st := t.State()
	st.Unlock()
	defer st.Lock()

	req, err := http.NewRequest("POST", cfg.requestIDURL, nil)
	if err != nil {
		return "", fmt.Errorf("internal error: cannot create request-id request %q", cfg.requestIDURL)
	}
	cfg.applyHeaders(req)

	resp, err := client.Do(req)
	if err != nil {
		return "", retryErr(t, "cannot retrieve request-id for making a request for a serial: %v", err)
	}
	defer resp.Body.Close()
	if resp.StatusCode != 200 {
		return "", retryErr(t, "cannot retrieve request-id for making a request for a serial: unexpected status %d", resp.StatusCode)
	}

	dec := json.NewDecoder(resp.Body)
	var requestID requestIDResp
	err = dec.Decode(&requestID)
	if err != nil { // assume broken i/o
		return "", retryErr(t, "cannot read response with request-id for making a request for a serial: %v", err)
	}

	encodedPubKey, err := asserts.EncodePublicKey(privKey.PublicKey())
	if err != nil {
		return "", fmt.Errorf("internal error: cannot encode device public key: %v", err)

	}

	headers := map[string]interface{}{
		"brand-id":   device.Brand,
		"model":      device.Model,
		"request-id": requestID.RequestID,
		"device-key": string(encodedPubKey),
	}
	if cfg.proposedSerial != "" {
		headers["serial"] = cfg.proposedSerial
	}

	serialReq, err := asserts.SignWithoutAuthority(asserts.SerialRequestType, headers, cfg.body, privKey)
	if err != nil {
		return "", err
	}

	return string(asserts.Encode(serialReq)), nil
}
Exemplo n.º 7
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func (s *deviceMgrSuite) TestDeviceAssertionsDeviceSessionRequest(c *C) {
	// nothing there
	_, _, err := s.mgr.DeviceSessionRequest("NONCE-1")
	c.Check(err, Equals, state.ErrNoState)

	// setup state as done by device initialisation
	s.state.Lock()
	devKey, _ := assertstest.GenerateKey(1024)
	encDevKey, err := asserts.EncodePublicKey(devKey.PublicKey())
	c.Check(err, IsNil)
	seriala, err := s.storeSigning.Sign(asserts.SerialType, map[string]interface{}{
		"brand-id":            "canonical",
		"model":               "pc",
		"serial":              "8989",
		"device-key":          string(encDevKey),
		"device-key-sha3-384": devKey.PublicKey().ID(),
		"timestamp":           time.Now().Format(time.RFC3339),
	}, nil, "")
	c.Assert(err, IsNil)
	err = assertstate.Add(s.state, seriala)
	c.Assert(err, IsNil)

	auth.SetDevice(s.state, &auth.DeviceState{
		Brand:  "canonical",
		Model:  "pc",
		Serial: "8989",
		KeyID:  devKey.PublicKey().ID(),
	})
	s.mgr.KeypairManager().Put(devKey)
	s.state.Unlock()

	sessReq, serial, err := s.mgr.DeviceSessionRequest("NONCE-1")
	c.Assert(err, IsNil)

	c.Check(serial.Serial(), Equals, "8989")

	// correctly signed with device key
	err = asserts.SignatureCheck(sessReq, devKey.PublicKey())
	c.Check(err, IsNil)

	c.Check(sessReq.BrandID(), Equals, "canonical")
	c.Check(sessReq.Model(), Equals, "pc")
	c.Check(sessReq.Serial(), Equals, "8989")
	c.Check(sessReq.Nonce(), Equals, "NONCE-1")
}
Exemplo n.º 8
0
func (x *cmdExportKey) Execute(args []string) error {
	if len(args) > 0 {
		return ErrExtraArgs
	}

	keyName := string(x.Positional.KeyName)
	if keyName == "" {
		keyName = "default"
	}

	manager := asserts.NewGPGKeypairManager()
	if x.Account != "" {
		privKey, err := manager.GetByName(keyName)
		if err != nil {
			return err
		}
		pubKey := privKey.PublicKey()
		headers := map[string]interface{}{
			"account-id":          x.Account,
			"name":                keyName,
			"public-key-sha3-384": pubKey.ID(),
			"since":               time.Now().UTC().Format(time.RFC3339),
			// XXX: To support revocation, we need to check for matching known assertions and set a suitable revision if we find one.
		}
		body, err := asserts.EncodePublicKey(pubKey)
		if err != nil {
			return err
		}
		assertion, err := asserts.SignWithoutAuthority(asserts.AccountKeyRequestType, headers, body, privKey)
		if err != nil {
			return err
		}
		fmt.Fprint(Stdout, string(asserts.Encode(assertion)))
	} else {
		encoded, err := manager.Export(keyName)
		if err != nil {
			return err
		}
		fmt.Fprintf(Stdout, "%s\n", encoded)
	}
	return nil
}
Exemplo n.º 9
0
func (aks *accountKeySuite) SetUpSuite(c *C) {
	cfg1 := &asserts.DatabaseConfig{}
	accDb, err := asserts.OpenDatabase(cfg1)
	c.Assert(err, IsNil)
	aks.privKey = testPrivKey1
	err = accDb.ImportKey(aks.privKey)
	c.Assert(err, IsNil)
	aks.keyID = aks.privKey.PublicKey().ID()

	pubKey, err := accDb.PublicKey(aks.keyID)
	c.Assert(err, IsNil)
	pubKeyEncoded, err := asserts.EncodePublicKey(pubKey)
	c.Assert(err, IsNil)
	aks.pubKeyBody = string(pubKeyEncoded)

	aks.since, err = time.Parse(time.RFC822, "16 Nov 15 15:04 UTC")
	c.Assert(err, IsNil)
	aks.until = aks.since.AddDate(1, 0, 0)
	aks.sinceLine = "since: " + aks.since.Format(time.RFC3339) + "\n"
	aks.untilLine = "until: " + aks.until.Format(time.RFC3339) + "\n"
}
Exemplo n.º 10
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func generateSerialRequestAssertion(model, serial string) (string, error) {
	privateKey, _ := generatePrivateKey()
	encodedPubKey, _ := asserts.EncodePublicKey(privateKey.PublicKey())

	headers := map[string]interface{}{
		"brand-id":   "System",
		"device-key": string(encodedPubKey),
		"request-id": "REQID",
		"model":      model,
	}

	body := fmt.Sprintf("serial: %s", serial)

	sreq, err := asserts.SignWithoutAuthority(asserts.SerialRequestType, headers, []byte(body), privateKey)
	if err != nil {
		return "", err
	}

	assertSR := asserts.Encode(sreq)
	return string(assertSR), nil
}
Exemplo n.º 11
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// NewAccountKey creates an account-key assertion for the account, it fills in values for missing headers as needed. In panics on error.
func NewAccountKey(db SignerDB, acct *asserts.Account, otherHeaders map[string]interface{}, pubKey asserts.PublicKey, keyID string) *asserts.AccountKey {
	if otherHeaders == nil {
		otherHeaders = make(map[string]interface{})
	}
	otherHeaders["account-id"] = acct.AccountID()
	otherHeaders["public-key-sha3-384"] = pubKey.ID()
	if otherHeaders["name"] == nil {
		otherHeaders["name"] = "default"
	}
	if otherHeaders["since"] == nil {
		otherHeaders["since"] = time.Now().Format(time.RFC3339)
	}
	encodedPubKey, err := asserts.EncodePublicKey(pubKey)
	if err != nil {
		panic(err)
	}
	a, err := db.Sign(asserts.AccountKeyType, otherHeaders, encodedPubKey, keyID)
	if err != nil {
		panic(err)
	}
	return a.(*asserts.AccountKey)
}
Exemplo n.º 12
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func (safs *signAddFindSuite) TestDontLetAddConfusinglyAssertionClashingWithTrustedOnes(c *C) {
	// trusted
	pubKey0, err := safs.signingDB.PublicKey(safs.signingKeyID)
	c.Assert(err, IsNil)
	pubKey0Encoded, err := asserts.EncodePublicKey(pubKey0)
	c.Assert(err, IsNil)

	now := time.Now().UTC()
	headers := map[string]interface{}{
		"authority-id":        "canonical",
		"account-id":          "canonical",
		"public-key-sha3-384": safs.signingKeyID,
		"name":                "default",
		"since":               now.Format(time.RFC3339),
		"until":               now.AddDate(1, 0, 0).Format(time.RFC3339),
	}
	tKey, err := safs.signingDB.Sign(asserts.AccountKeyType, headers, []byte(pubKey0Encoded), safs.signingKeyID)
	c.Assert(err, IsNil)

	err = safs.db.Add(tKey)
	c.Check(err, ErrorMatches, `cannot add "account-key" assertion with primary key clashing with a trusted assertion: .*`)
}
Exemplo n.º 13
0
func prepareSerialRequest(t *state.Task, privKey asserts.PrivateKey, device *auth.DeviceState, client *http.Client) (string, error) {
	st := t.State()
	st.Unlock()
	defer st.Lock()
	resp, err := client.Post(requestIDURL, "", nil)
	if err != nil {
		return "", retryErr(t, "cannot retrieve request-id for making a request for a serial: %v", err)
	}
	defer resp.Body.Close()
	if resp.StatusCode != 200 {
		return "", retryErr(t, "cannot retrieve request-id for making a request for a serial: unexpected status %d", resp.StatusCode)
	}

	dec := json.NewDecoder(resp.Body)
	var requestID requestIDResp
	err = dec.Decode(&requestID)
	if err != nil { // assume broken i/o
		return "", retryErr(t, "cannot read response with request-id for making a request for a serial: %v", err)
	}

	encodedPubKey, err := asserts.EncodePublicKey(privKey.PublicKey())
	if err != nil {
		return "", fmt.Errorf("internal error: cannot encode device public key: %v", err)

	}

	serialReq, err := asserts.SignWithoutAuthority(asserts.SerialRequestType, map[string]interface{}{
		"brand-id":   device.Brand,
		"model":      device.Model,
		"request-id": requestID.RequestID,
		"device-key": string(encodedPubKey),
	}, nil, privKey) // XXX: fill body with some agreed hardware details
	if err != nil {
		return "", err
	}

	return string(asserts.Encode(serialReq)), nil
}
Exemplo n.º 14
0
func (s *deviceMgrSuite) TestDeviceManagerEnsureSeedYamlRecover(c *C) {
	release.OnClassic = false

	restore := devicestate.MockPopulateStateFromSeed(func(*state.State) (ts []*state.TaskSet, err error) {
		return nil, errors.New("should not be called")
	})
	defer restore()

	s.state.Lock()
	defer s.state.Unlock()

	s.setupCore(c, "ubuntu-core", `
name: ubuntu-core
type: os
version: ubuntu-core
`, "")

	// have a model assertion
	model, err := s.storeSigning.Sign(asserts.ModelType, map[string]interface{}{
		"series":       "16",
		"brand-id":     "canonical",
		"model":        "pc",
		"gadget":       "pc",
		"kernel":       "kernel",
		"architecture": "amd64",
		"timestamp":    time.Now().Format(time.RFC3339),
	}, nil, "")
	c.Assert(err, IsNil)
	err = assertstate.Add(s.state, model)
	c.Assert(err, IsNil)

	// have a serial assertion
	devKey, _ := assertstest.GenerateKey(752)
	encDevKey, err := asserts.EncodePublicKey(devKey.PublicKey())
	keyID := devKey.PublicKey().ID()
	c.Assert(err, IsNil)
	serial, err := s.storeSigning.Sign(asserts.SerialType, map[string]interface{}{
		"brand-id":            "canonical",
		"model":               "pc",
		"serial":              "8989",
		"device-key":          string(encDevKey),
		"device-key-sha3-384": keyID,
		"timestamp":           time.Now().Format(time.RFC3339),
	}, nil, "")
	c.Assert(err, IsNil)
	err = assertstate.Add(s.state, serial)
	c.Assert(err, IsNil)

	// forgotten key id and serial
	auth.SetDevice(s.state, &auth.DeviceState{
		Brand: "canonical",
		Model: "pc",
	})
	// put key on disk
	err = s.mgr.KeypairManager().Put(devKey)
	c.Assert(err, IsNil)
	// extra unused stuff
	junk1 := filepath.Join(dirs.SnapDeviceDir, "private-keys-v1", "junkjunk1")
	err = ioutil.WriteFile(junk1, nil, 0644)
	c.Assert(err, IsNil)
	junk2 := filepath.Join(dirs.SnapDeviceDir, "private-keys-v1", "junkjunk2")
	err = ioutil.WriteFile(junk2, nil, 0644)
	c.Assert(err, IsNil)
	// double check
	pat := filepath.Join(dirs.SnapDeviceDir, "private-keys-v1", "*")
	onDisk, err := filepath.Glob(pat)
	c.Assert(err, IsNil)
	c.Check(onDisk, HasLen, 3)

	s.state.Unlock()
	err = s.mgr.EnsureSeedYaml()
	s.state.Lock()
	c.Assert(err, IsNil)

	c.Check(s.state.Changes(), HasLen, 0)

	var seeded bool
	err = s.state.Get("seeded", &seeded)
	c.Assert(err, IsNil)
	c.Check(seeded, Equals, true)

	device, err := auth.Device(s.state)
	c.Assert(err, IsNil)
	c.Check(device, DeepEquals, &auth.DeviceState{
		Brand:  "canonical",
		Model:  "pc",
		KeyID:  keyID,
		Serial: "8989",
	})
	// key is still there
	_, err = s.mgr.KeypairManager().Get(keyID)
	c.Assert(err, IsNil)
	onDisk, err = filepath.Glob(pat)
	c.Assert(err, IsNil)
	// junk was removed
	c.Check(onDisk, HasLen, 1)
}
Exemplo n.º 15
0
func (s *deviceMgrSuite) TestDeviceAssertionsModelAndSerial(c *C) {
	// nothing in the state
	s.state.Lock()
	_, err := devicestate.Model(s.state)
	s.state.Unlock()
	c.Check(err, Equals, state.ErrNoState)
	s.state.Lock()
	_, err = devicestate.Serial(s.state)
	s.state.Unlock()
	c.Check(err, Equals, state.ErrNoState)

	_, err = s.mgr.Model()
	c.Check(err, Equals, state.ErrNoState)
	_, err = s.mgr.Serial()
	c.Check(err, Equals, state.ErrNoState)

	// just brand and model
	s.state.Lock()
	auth.SetDevice(s.state, &auth.DeviceState{
		Brand: "canonical",
		Model: "pc",
	})
	s.state.Unlock()
	_, err = s.mgr.Model()
	c.Check(err, Equals, state.ErrNoState)
	_, err = s.mgr.Serial()
	c.Check(err, Equals, state.ErrNoState)

	// have a model assertion
	model, err := s.storeSigning.Sign(asserts.ModelType, map[string]interface{}{
		"series":       "16",
		"brand-id":     "canonical",
		"model":        "pc",
		"gadget":       "pc",
		"kernel":       "kernel",
		"architecture": "amd64",
		"timestamp":    time.Now().Format(time.RFC3339),
	}, nil, "")
	c.Assert(err, IsNil)
	s.state.Lock()
	err = assertstate.Add(s.state, model)
	s.state.Unlock()
	c.Assert(err, IsNil)

	mod, err := s.mgr.Model()
	c.Assert(err, IsNil)
	c.Assert(mod.BrandID(), Equals, "canonical")

	s.state.Lock()
	mod, err = devicestate.Model(s.state)
	s.state.Unlock()
	c.Assert(err, IsNil)
	c.Assert(mod.BrandID(), Equals, "canonical")

	_, err = s.mgr.Serial()
	c.Check(err, Equals, state.ErrNoState)

	// have a serial as well
	s.state.Lock()
	auth.SetDevice(s.state, &auth.DeviceState{
		Brand:  "canonical",
		Model:  "pc",
		Serial: "8989",
	})
	s.state.Unlock()
	_, err = s.mgr.Model()
	c.Assert(err, IsNil)
	_, err = s.mgr.Serial()
	c.Check(err, Equals, state.ErrNoState)

	// have a serial assertion
	devKey, _ := assertstest.GenerateKey(752)
	encDevKey, err := asserts.EncodePublicKey(devKey.PublicKey())
	c.Assert(err, IsNil)
	serial, err := s.storeSigning.Sign(asserts.SerialType, map[string]interface{}{
		"brand-id":            "canonical",
		"model":               "pc",
		"serial":              "8989",
		"device-key":          string(encDevKey),
		"device-key-sha3-384": devKey.PublicKey().ID(),
		"timestamp":           time.Now().Format(time.RFC3339),
	}, nil, "")
	c.Assert(err, IsNil)
	s.state.Lock()
	err = assertstate.Add(s.state, serial)
	s.state.Unlock()
	c.Assert(err, IsNil)

	_, err = s.mgr.Model()
	c.Assert(err, IsNil)
	ser, err := s.mgr.Serial()
	c.Assert(err, IsNil)
	c.Check(ser.Serial(), Equals, "8989")

	s.state.Lock()
	ser, err = devicestate.Serial(s.state)
	s.state.Unlock()
	c.Assert(err, IsNil)
	c.Check(ser.Serial(), Equals, "8989")
}
Exemplo n.º 16
0
func (s *authContextSetupSuite) SetUpTest(c *C) {
	tempdir := c.MkDir()
	dirs.SetRootDir(tempdir)
	err := os.MkdirAll(filepath.Dir(dirs.SnapStateFile), 0755)
	c.Assert(err, IsNil)

	captureAuthContext := func(_ *store.Config, ac auth.AuthContext) *store.Store {
		s.ac = ac
		return nil
	}
	r := overlord.MockStoreNew(captureAuthContext)
	defer r()

	s.storeSigning = assertstest.NewStoreStack("can0nical", rootPrivKey, storePrivKey)
	s.restoreTrusted = sysdb.InjectTrusted(s.storeSigning.Trusted)

	s.brandSigning = assertstest.NewSigningDB("my-brand", brandPrivKey)

	brandAcct := assertstest.NewAccount(s.storeSigning, "my-brand", map[string]interface{}{
		"account-id":   "my-brand",
		"verification": "certified",
	}, "")
	s.storeSigning.Add(brandAcct)

	brandAccKey := assertstest.NewAccountKey(s.storeSigning, brandAcct, nil, brandPrivKey.PublicKey(), "")
	s.storeSigning.Add(brandAccKey)

	model, err := s.brandSigning.Sign(asserts.ModelType, map[string]interface{}{
		"series":       "16",
		"authority-id": "my-brand",
		"brand-id":     "my-brand",
		"model":        "my-model",
		"architecture": "amd64",
		"store":        "my-brand-store-id",
		"gadget":       "pc",
		"kernel":       "pc-kernel",
		"timestamp":    time.Now().Format(time.RFC3339),
	}, nil, "")
	c.Assert(err, IsNil)
	s.model = model.(*asserts.Model)

	encDevKey, err := asserts.EncodePublicKey(deviceKey.PublicKey())
	c.Assert(err, IsNil)
	serial, err := s.brandSigning.Sign(asserts.SerialType, map[string]interface{}{
		"authority-id":        "my-brand",
		"brand-id":            "my-brand",
		"model":               "my-model",
		"serial":              "7878",
		"device-key":          string(encDevKey),
		"device-key-sha3-384": deviceKey.PublicKey().ID(),
		"timestamp":           time.Now().Format(time.RFC3339),
	}, nil, "")
	c.Assert(err, IsNil)
	s.serial = serial.(*asserts.Serial)

	o, err := overlord.New()
	c.Assert(err, IsNil)
	s.o = o

	st := o.State()
	st.Lock()
	defer st.Unlock()

	prereqs := []asserts.Assertion{s.storeSigning.StoreAccountKey(""), brandAcct, brandAccKey}
	for _, a := range prereqs {
		err = assertstate.Add(st, a)
		c.Assert(err, IsNil)
	}
}