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refactor: enable usage of legacy Anoncrypt packer. Make nested forwar…
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…ds while creating forward message. Add legacyForward model (#3272)

* refactor: remote cryptobox URLs renamed to /wrap and /unwrap (#3259)

this change updates the remote CryptoBox api URIs to point to remote KMS's key /wrap and /unwrap to match ECDH-ES and ECDH-1PU key wrapping.

This change requires the KMS server to udpate /easy to /wrap, /easyOpen and /sealOpen to /unwrap

Signed-off-by: Baha Shaaban <[email protected]>
Signed-off-by: Abdulbois <[email protected]>

* refactor: re enable remote kms bdd-tests with unwrapKey (#3263)

This change updates the webkms server in bdd tests and re enables commented out webkms tests requiring cryptobox's /wrap and /unwrap operations.

closes #3262

Signed-off-by: Baha Shaaban <[email protected]>
Signed-off-by: Abdulbois <[email protected]>

* refactor: Enable usage of legacy Anoncrypt packer. Make nested forwards while creating forward message. Add legacyForward model

- Add legacy Anoncrypt packer while creating packers
- Add ability to create nested packed forwards (one nested forward for each routing key)
- Check and convert msg field of Forward to Envelope in order to support DIDComm V1 Forward types
- Revert part of 04bfea8 commit related to generating keys inside mediator service. Because with previous changes (having two types of generated keys belonging to the same router) it breaks Route Coordination protocol (while creating nested forwards it will pack two times to the same mediator then mediator cannot handle second forward message)

Signed-off-by: Abdulbois <[email protected]>

* refactor: Remove test due to forcing anoncrypt while calling createForwardMessage. Fix lint errors

Signed-off-by: Abdulbois <[email protected]>

Co-authored-by: Baha <[email protected]>
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@Abdulbois @baha-ai
Abdulbois and baha-ai authored Jul 18, 2022
1 parent d96b693 commit cea4427
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Showing 11 changed files with 184 additions and 89 deletions.
3 changes: 3 additions & 0 deletions cmd/aries-agent-mobile/go.sum
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Expand Up @@ -275,11 +275,14 @@ github.com/spaolacci/murmur3 v1.1.0/go.mod h1:JwIasOWyU6f++ZhiEuf87xNszmSA2myDM2
github.com/square/go-jose/v3 v3.0.0-20200630053402-0a67ce9b0693 h1:wD1IWQwAhdWclCwaf6DdzgCAe9Bfz1M+4AHRd7N786Y=
github.com/square/go-jose/v3 v3.0.0-20200630053402-0a67ce9b0693/go.mod h1:6hSY48PjDm4UObWmGLyJE9DxYVKTgR9kbCspXXJEhcU=
github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
github.com/stretchr/objx v0.4.0 h1:M2gUjqZET1qApGOWNSnZ49BAIMX4F/1plDv3+l31EJ4=
github.com/stretchr/objx v0.4.0/go.mod h1:YvHI0jy2hoMjB+UWwv71VJQ9isScKT/TqJzVSSt89Yw=
github.com/stretchr/testify v1.2.2/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXfy6kDkUVs=
github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
github.com/stretchr/testify v1.4.0/go.mod h1:j7eGeouHqKxXV5pUuKE4zz7dFj8WfuZ+81PSLYec5m4=
github.com/stretchr/testify v1.6.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
github.com/stretchr/testify v1.7.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
github.com/stretchr/testify v1.7.2 h1:4jaiDzPyXQvSd7D0EjG45355tLlV3VOECpq10pLC+8s=
github.com/stretchr/testify v1.7.2/go.mod h1:R6va5+xMeoiuVRoj+gSkQ7d3FALtqAAGI1FQKckRals=
github.com/teserakt-io/golang-ed25519 v0.0.0-20210104091850-3888c087a4c8 h1:RBkacARv7qY5laaXGlF4wFB/tk5rnthhPb8oIBGoagY=
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3 changes: 3 additions & 0 deletions cmd/aries-agent-rest/go.sum
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Expand Up @@ -347,11 +347,14 @@ github.com/square/go-jose/v3 v3.0.0-20200630053402-0a67ce9b0693 h1:wD1IWQwAhdWcl
github.com/square/go-jose/v3 v3.0.0-20200630053402-0a67ce9b0693/go.mod h1:6hSY48PjDm4UObWmGLyJE9DxYVKTgR9kbCspXXJEhcU=
github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
github.com/stretchr/objx v0.1.1/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
github.com/stretchr/objx v0.4.0 h1:M2gUjqZET1qApGOWNSnZ49BAIMX4F/1plDv3+l31EJ4=
github.com/stretchr/objx v0.4.0/go.mod h1:YvHI0jy2hoMjB+UWwv71VJQ9isScKT/TqJzVSSt89Yw=
github.com/stretchr/testify v1.2.2/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXfy6kDkUVs=
github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
github.com/stretchr/testify v1.4.0/go.mod h1:j7eGeouHqKxXV5pUuKE4zz7dFj8WfuZ+81PSLYec5m4=
github.com/stretchr/testify v1.6.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
github.com/stretchr/testify v1.7.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
github.com/stretchr/testify v1.7.2 h1:4jaiDzPyXQvSd7D0EjG45355tLlV3VOECpq10pLC+8s=
github.com/stretchr/testify v1.7.2/go.mod h1:R6va5+xMeoiuVRoj+gSkQ7d3FALtqAAGI1FQKckRals=
github.com/syndtr/goleveldb v1.0.0 h1:fBdIW9lB4Iz0n9khmH8w27SJ3QEJ7+IgjPEwGSZiFdE=
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1 change: 1 addition & 0 deletions go.mod
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Original file line number Diff line number Diff line change
Expand Up @@ -56,6 +56,7 @@ require (
github.com/pmezard/go-difflib v1.0.0 // indirect
github.com/pquerna/cachecontrol v0.1.0 // indirect
github.com/spaolacci/murmur3 v1.1.0 // indirect
github.com/stretchr/objx v0.4.0 // indirect
github.com/tidwall/match v1.0.3 // indirect
github.com/tidwall/pretty v1.0.2 // indirect
github.com/xeipuuv/gojsonpointer v0.0.0-20190905194746-02993c407bfb // indirect
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3 changes: 3 additions & 0 deletions go.sum
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Original file line number Diff line number Diff line change
Expand Up @@ -322,11 +322,14 @@ github.com/spaolacci/murmur3 v1.1.0/go.mod h1:JwIasOWyU6f++ZhiEuf87xNszmSA2myDM2
github.com/square/go-jose/v3 v3.0.0-20200630053402-0a67ce9b0693 h1:wD1IWQwAhdWclCwaf6DdzgCAe9Bfz1M+4AHRd7N786Y=
github.com/square/go-jose/v3 v3.0.0-20200630053402-0a67ce9b0693/go.mod h1:6hSY48PjDm4UObWmGLyJE9DxYVKTgR9kbCspXXJEhcU=
github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
github.com/stretchr/objx v0.4.0 h1:M2gUjqZET1qApGOWNSnZ49BAIMX4F/1plDv3+l31EJ4=
github.com/stretchr/objx v0.4.0/go.mod h1:YvHI0jy2hoMjB+UWwv71VJQ9isScKT/TqJzVSSt89Yw=
github.com/stretchr/testify v1.2.2/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXfy6kDkUVs=
github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
github.com/stretchr/testify v1.4.0/go.mod h1:j7eGeouHqKxXV5pUuKE4zz7dFj8WfuZ+81PSLYec5m4=
github.com/stretchr/testify v1.6.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
github.com/stretchr/testify v1.7.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
github.com/stretchr/testify v1.7.2 h1:4jaiDzPyXQvSd7D0EjG45355tLlV3VOECpq10pLC+8s=
github.com/stretchr/testify v1.7.2/go.mod h1:R6va5+xMeoiuVRoj+gSkQ7d3FALtqAAGI1FQKckRals=
github.com/teserakt-io/golang-ed25519 v0.0.0-20200315192543-8255be791ce4/go.mod h1:9PdLyPiZIiW3UopXyRnPYyjUXSpiQNHRLu8fOsR3o8M=
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97 changes: 71 additions & 26 deletions pkg/didcomm/dispatcher/outbound/outbound.go
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Original file line number Diff line number Diff line change
Expand Up @@ -24,7 +24,6 @@ import (
"github.com/hyperledger/aries-framework-go/pkg/framework/aries/api/vdr"
"github.com/hyperledger/aries-framework-go/pkg/kms"
"github.com/hyperledger/aries-framework-go/pkg/store/connection"
"github.com/hyperledger/aries-framework-go/pkg/vdr/fingerprint"
"github.com/hyperledger/aries-framework-go/spi/storage"
)

Expand Down Expand Up @@ -66,6 +65,15 @@ type Dispatcher struct {
didcommV2Handler *middleware.DIDCommMessageMiddleware
}

// legacyForward is DIDComm V1 route Forward msg as declared in
// https://github.com/hyperledger/aries-rfcs/blob/main/concepts/0094-cross-domain-messaging/README.md
type legacyForward struct {
Type string `json:"@type,omitempty"`
ID string `json:"@id,omitempty"`
To string `json:"to,omitempty"`
Msg *model.Envelope `json:"msg,omitempty"`
}

var logger = log.New("aries-framework/didcomm/dispatcher")

// NewOutbound return new dispatcher outbound instance.
Expand Down Expand Up @@ -340,32 +348,21 @@ func (o *Dispatcher) Forward(msg interface{}, des *service.Destination) error {
return fmt.Errorf("outboundDispatcher.Forward: no transport found for serviceEndpoint: %s", uri)
}

//nolint:funlen
func (o *Dispatcher) createForwardMessage(msg []byte, des *service.Destination) ([]byte, error) {
forwardMsgType := service.ForwardMsgType

mtProfile := o.mediaTypeProfile(des)

var (
senderKey []byte
err error
forwardMsgType string
err error
)

switch mtProfile {
case transport.MediaTypeV2EncryptedEnvelopeV1PlaintextPayload, transport.MediaTypeV2EncryptedEnvelope,
transport.MediaTypeAIP2RFC0587Profile, transport.MediaTypeV2PlaintextPayload, transport.MediaTypeDIDCommV2Profile:
// for DIDComm V2, do not set senderKey to force Anoncrypt packing. Only set the V2 forwardMsgType.
forwardMsgType = service.ForwardMsgTypeV2
default: // default is DIDComm V1, create a dummy key as senderKey
// create key set
_, senderKey, err = o.kms.CreateAndExportPubKeyBytes(kms.ED25519Type)
if err != nil {
return nil, fmt.Errorf("failed Create and export Encryption Key: %w", err)
}

senderDIDKey, _ := fingerprint.CreateDIDKey(senderKey)

senderKey = []byte(senderDIDKey)
default: // default is DIDComm V1
forwardMsgType = service.ForwardMsgType
}

routingKeys, err := des.ServiceEndpoint.RoutingKeys()
Expand All @@ -382,26 +379,74 @@ func (o *Dispatcher) createForwardMessage(msg []byte, des *service.Destination)
routingKeys = des.RoutingKeys
}

// create forward message
forward := &model.Forward{
Type: forwardMsgType,
ID: uuid.New().String(),
To: des.RecipientKeys[0],
Msg: msg,
fwdKeys := append([]string{des.RecipientKeys[0]}, routingKeys...)

packedMsg, err := o.createPackedNestedForwards(msg, fwdKeys, forwardMsgType, mtProfile)
if err != nil {
return nil, fmt.Errorf("failed to create packed nested forwards: %w", err)
}

return packedMsg, nil
}

func (o *Dispatcher) createPackedNestedForwards(msg []byte, routingKeys []string, fwdMsgType, mtProfile string) ([]byte, error) { //nolint: lll
for i, key := range routingKeys {
if i+1 >= len(routingKeys) {
break
}
// create forward message
forward := model.Forward{
Type: fwdMsgType,
ID: uuid.New().String(),
To: key,
Msg: msg,
}

var err error

msg, err = o.packForward(forward, []string{routingKeys[i+1]}, mtProfile)
if err != nil {
return nil, fmt.Errorf("failed to pack forward msg: %w", err)
}
}

return msg, nil
}

func (o *Dispatcher) packForward(fwd model.Forward, toKeys []string, mtProfile string) ([]byte, error) {
env := &model.Envelope{}

var (
forward interface{}
err error
req []byte
)
// try to convert msg to Envelope
err = json.Unmarshal(fwd.Msg, env)
if err == nil {
forward = legacyForward{
Type: fwd.Type,
ID: fwd.ID,
To: fwd.To,
Msg: env,
}
} else {
forward = fwd
}
// convert forward message to bytes
req, err := json.Marshal(forward)
req, err = json.Marshal(forward)
if err != nil {
return nil, fmt.Errorf("failed marshal to bytes: %w", err)
}

packedMsg, err := o.packager.PackMessage(&transport.Envelope{
var packedMsg []byte
packedMsg, err = o.packager.PackMessage(&transport.Envelope{
MediaTypeProfile: mtProfile,
Message: req,
FromKey: senderKey,
ToKeys: routingKeys,
FromKey: []byte{},
ToKeys: toKeys,
})

if err != nil {
return nil, fmt.Errorf("failed to pack forward msg: %w", err)
}
Expand Down
70 changes: 46 additions & 24 deletions pkg/didcomm/dispatcher/outbound/outbound_test.go
View file
Original file line number Diff line number Diff line change
Expand Up @@ -13,6 +13,7 @@ import (
"testing"

"github.com/google/uuid"
"github.com/stretchr/testify/mock"
"github.com/stretchr/testify/require"

"github.com/hyperledger/aries-framework-go/pkg/common/model"
Expand Down Expand Up @@ -47,6 +48,38 @@ func TestNewOutbound(t *testing.T) {
})
}

func TestOutBoundDispatcher_createPackedNestedForwards(t *testing.T) {
t.Run("test send with nested forward message - success", func(t *testing.T) {
data := "data"
recKey1 := "recKey1"
rtKey1 := "rtKey1"
rtKey2 := "rtKey2"
packager := &mockPackager{}
expectedRequest := `{"protected":"","iv":"","ciphertext":"","tag":""}`

o, err := NewOutbound(&mockProvider{
packagerValue: packager,
outboundTransportsValue: []transport.OutboundTransport{&mockOutboundTransport{expectedRequest: expectedRequest}},
storageProvider: mockstore.NewMockStoreProvider(),
protoStorageProvider: mockstore.NewMockStoreProvider(),
mediaTypeProfiles: []string{transport.MediaTypeDIDCommV2Profile},
})
require.NoError(t, err)

packager.On("PackMessage", []string{recKey1}).Return([]byte(expectedRequest))
packager.On("PackMessage", []string{rtKey1}).Return([]byte(expectedRequest))
packager.On("PackMessage", []string{rtKey2}).Return([]byte(expectedRequest))

require.NoError(t, o.Send(data, "", &service.Destination{
ServiceEndpoint: model.NewDIDCommV2Endpoint([]model.DIDCommV2Endpoint{
{URI: "url", RoutingKeys: []string{rtKey1, rtKey2}},
}),
RecipientKeys: []string{recKey1},
}))
packager.AssertExpectations(t)
})
}

func TestOutboundDispatcher_Send(t *testing.T) {
t.Run("test success", func(t *testing.T) {
o, err := NewOutbound(&mockProvider{
Expand Down Expand Up @@ -173,29 +206,6 @@ func TestOutboundDispatcher_Send(t *testing.T) {
}))
})

t.Run("test send with forward message - create key failure", func(t *testing.T) {
o, err := NewOutbound(&mockProvider{
packagerValue: &mockpackager.Packager{PackValue: createPackedMsgForForward(t)},
outboundTransportsValue: []transport.OutboundTransport{&mockdidcomm.MockOutboundTransport{AcceptValue: true}},
kms: &mockkms.KeyManager{
CrAndExportPubKeyErr: errors.New("create and export key error"),
},
storageProvider: mockstore.NewMockStoreProvider(),
protoStorageProvider: mockstore.NewMockStoreProvider(),
mediaTypeProfiles: []string{transport.MediaTypeAIP2RFC0019Profile},
})
require.NoError(t, err)

err = o.Send("data", mockdiddoc.MockDIDKey(t), &service.Destination{
ServiceEndpoint: model.NewDIDCommV2Endpoint([]model.DIDCommV2Endpoint{
{URI: "url", RoutingKeys: []string{"xyz"}},
}),
RecipientKeys: []string{"abc"},
})
require.EqualError(t, err, "outboundDispatcher.Send: failed to create forward msg: failed Create "+
"and export Encryption Key: create and export key error")
})

t.Run("test send with forward message - packer error", func(t *testing.T) {
o, err := NewOutbound(&mockProvider{
packagerValue: &mockpackager.Packager{PackErr: errors.New("pack error")},
Expand Down Expand Up @@ -778,9 +788,21 @@ func (o *mockOutboundTransport) Accept(url string) bool {
}

// mockPackager mock packager.
type mockPackager struct{}
type mockPackager struct {
mock.Mock
}

func (m *mockPackager) PackMessage(e *transport.Envelope) ([]byte, error) {
if len(m.ExpectedCalls) > 0 {
args := m.Called(e.ToKeys)
switch v := args.Get(0).(type) {
case []byte:
return v, nil
default:
return e.Message, nil
}
}

return e.Message, nil
}

Expand Down
36 changes: 23 additions & 13 deletions pkg/didcomm/packager/packager.go
View file
Original file line number Diff line number Diff line change
Expand Up @@ -18,6 +18,7 @@ import (
"github.com/hyperledger/aries-framework-go/pkg/crypto"
"github.com/hyperledger/aries-framework-go/pkg/didcomm/packer"
"github.com/hyperledger/aries-framework-go/pkg/didcomm/packer/authcrypt"
legacyAuthCrypt "github.com/hyperledger/aries-framework-go/pkg/didcomm/packer/legacy/authcrypt"
"github.com/hyperledger/aries-framework-go/pkg/didcomm/transport"
"github.com/hyperledger/aries-framework-go/pkg/doc/did"
"github.com/hyperledger/aries-framework-go/pkg/doc/jose/jwk/jwksupport"
Expand Down Expand Up @@ -83,8 +84,10 @@ func New(ctx Provider) (*Packager, error) {
func (bp *Packager) addPacker(pack packer.Packer) {
packerID := pack.EncodingType()

_, ok := pack.(*authcrypt.Packer)
if ok {
_, isAuthCrypt := pack.(*authcrypt.Packer)
_, isLegacyAuthCrypt := pack.(*legacyAuthCrypt.Packer)

if isAuthCrypt || isLegacyAuthCrypt {
// anoncrypt and authcrypt have the same encoding type
// so authcrypt will have an appended suffix
packerID += authSuffix
Expand Down Expand Up @@ -276,6 +279,7 @@ type envelopeStub struct {
type headerStub struct {
Type string `json:"typ,omitempty"`
SKID string `json:"skid,omitempty"`
Alg string `json:"alg,omitempty"`
}

//nolint:funlen, gocyclo
Expand Down Expand Up @@ -349,7 +353,7 @@ func getEncodingType(encMessage []byte) (string, []byte, error) {

packerID := prot.Type

if prot.SKID != "" {
if prot.SKID != "" || prot.Alg == "Authcrypt" {
// since Type protected header is the same for authcrypt and anoncrypt, the differentiating factor is SKID.
// If it is present, then it's authcrypt.
packerID += authSuffix
Expand Down Expand Up @@ -385,22 +389,20 @@ func (bp *Packager) UnpackMessage(encMessage []byte) (*transport.Envelope, error
func (bp *Packager) getCTYAndPacker(envelope *transport.Envelope) (string, packer.Packer, error) {
switch envelope.MediaTypeProfile {
case transport.MediaTypeAIP2RFC0019Profile, transport.MediaTypeProfileDIDCommAIP1:
return transport.MediaTypeRFC0019EncryptedEnvelope, bp.packers[transport.MediaTypeRFC0019EncryptedEnvelope], nil
packerName := addAuthcryptSuffix(envelope.FromKey, transport.MediaTypeRFC0019EncryptedEnvelope)

return transport.MediaTypeRFC0019EncryptedEnvelope, bp.packers[packerName], nil
case transport.MediaTypeRFC0019EncryptedEnvelope:
return envelope.MediaTypeProfile, bp.packers[transport.MediaTypeRFC0019EncryptedEnvelope], nil
packerName := addAuthcryptSuffix(envelope.FromKey, transport.MediaTypeRFC0019EncryptedEnvelope)

return envelope.MediaTypeProfile, bp.packers[packerName], nil
case transport.MediaTypeV2EncryptedEnvelope, transport.MediaTypeV2PlaintextPayload,
transport.MediaTypeAIP2RFC0587Profile, transport.MediaTypeDIDCommV2Profile:
packerName := transport.MediaTypeV2EncryptedEnvelope
if len(envelope.FromKey) > 0 {
packerName += authSuffix
}
packerName := addAuthcryptSuffix(envelope.FromKey, transport.MediaTypeV2EncryptedEnvelope)

return transport.MediaTypeV2PlaintextPayload, bp.packers[packerName], nil
case transport.MediaTypeV2EncryptedEnvelopeV1PlaintextPayload, transport.MediaTypeV1PlaintextPayload:
packerName := transport.MediaTypeV2EncryptedEnvelope
if len(envelope.FromKey) > 0 {
packerName += authSuffix
}
packerName := addAuthcryptSuffix(envelope.FromKey, transport.MediaTypeV2EncryptedEnvelope)

return transport.MediaTypeV1PlaintextPayload, bp.packers[packerName], nil
default:
Expand All @@ -415,6 +417,14 @@ func (bp *Packager) getCTYAndPacker(envelope *transport.Envelope) (string, packe
return "", nil, fmt.Errorf("no packer found for mediatype profile: '%v'", envelope.MediaTypeProfile)
}

func addAuthcryptSuffix(fromKey []byte, packerName string) string {
if len(fromKey) > 0 {
packerName += authSuffix
}

return packerName
}

func (bp *Packager) resolveKeyAgreementFromDIDDoc(keyAgrID string) (*crypto.PublicKey, error) {
i := strings.Index(keyAgrID, "#")

Expand Down
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