add vendoring

vendor/maunium.net/go/mautrix/event/encryption.go

@@ -0,0 +1,148 @@
+// Copyright (c) 2020 Tulir Asokan
+//
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this
+// file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+package event
+
+import (
+	"encoding/json"
+
+	"maunium.net/go/mautrix/id"
+)
+
+// EncryptionEventContent represents the content of a m.room.encryption state event.
+// https://spec.matrix.org/v1.2/client-server-api/#mroomencryption
+type EncryptionEventContent struct {
+	// The encryption algorithm to be used to encrypt messages sent in this room. Must be 'm.megolm.v1.aes-sha2'.
+	Algorithm id.Algorithm `json:"algorithm"`
+	// How long the session should be used before changing it. 604800000 (a week) is the recommended default.
+	RotationPeriodMillis int64 `json:"rotation_period_ms,omitempty"`
+	// How many messages should be sent before changing the session. 100 is the recommended default.
+	RotationPeriodMessages int `json:"rotation_period_msgs,omitempty"`
+}
+
+// EncryptedEventContent represents the content of a m.room.encrypted message event.
+// https://spec.matrix.org/v1.2/client-server-api/#mroomencrypted
+//
+// Note that sender_key and device_id are deprecated in Megolm events as of https://github.com/matrix-org/matrix-spec-proposals/pull/3700
+type EncryptedEventContent struct {
+	Algorithm id.Algorithm `json:"algorithm"`
+	SenderKey id.SenderKey `json:"sender_key,omitempty"`
+	// Deprecated: Matrix v1.3
+	DeviceID id.DeviceID `json:"device_id,omitempty"`
+	// Only present for Megolm events
+	SessionID id.SessionID `json:"session_id,omitempty"`
+
+	Ciphertext json.RawMessage `json:"ciphertext"`
+
+	MegolmCiphertext []byte         `json:"-"`
+	OlmCiphertext    OlmCiphertexts `json:"-"`
+
+	RelatesTo *RelatesTo `json:"m.relates_to,omitempty"`
+}
+
+type OlmCiphertexts map[id.Curve25519]struct {
+	Body string        `json:"body"`
+	Type id.OlmMsgType `json:"type"`
+}
+
+type serializableEncryptedEventContent EncryptedEventContent
+
+func (content *EncryptedEventContent) UnmarshalJSON(data []byte) error {
+	err := json.Unmarshal(data, (*serializableEncryptedEventContent)(content))
+	if err != nil {
+		return err
+	}
+	switch content.Algorithm {
+	case id.AlgorithmOlmV1:
+		content.OlmCiphertext = make(OlmCiphertexts)
+		return json.Unmarshal(content.Ciphertext, &content.OlmCiphertext)
+	case id.AlgorithmMegolmV1:
+		if len(content.Ciphertext) == 0 || content.Ciphertext[0] != '"' || content.Ciphertext[len(content.Ciphertext)-1] != '"' {
+			return id.InputNotJSONString
+		}
+		content.MegolmCiphertext = content.Ciphertext[1 : len(content.Ciphertext)-1]
+	}
+	return nil
+}
+
+func (content *EncryptedEventContent) MarshalJSON() ([]byte, error) {
+	var err error
+	switch content.Algorithm {
+	case id.AlgorithmOlmV1:
+		content.Ciphertext, err = json.Marshal(content.OlmCiphertext)
+	case id.AlgorithmMegolmV1:
+		content.Ciphertext = make([]byte, len(content.MegolmCiphertext)+2)
+		content.Ciphertext[0] = '"'
+		content.Ciphertext[len(content.Ciphertext)-1] = '"'
+		copy(content.Ciphertext[1:len(content.Ciphertext)-1], content.MegolmCiphertext)
+	}
+	if err != nil {
+		return nil, err
+	}
+	return json.Marshal((*serializableEncryptedEventContent)(content))
+}
+
+// RoomKeyEventContent represents the content of a m.room_key to_device event.
+// https://spec.matrix.org/v1.2/client-server-api/#mroom_key
+type RoomKeyEventContent struct {
+	Algorithm  id.Algorithm `json:"algorithm"`
+	RoomID     id.RoomID    `json:"room_id"`
+	SessionID  id.SessionID `json:"session_id"`
+	SessionKey string       `json:"session_key"`
+}
+
+// ForwardedRoomKeyEventContent represents the content of a m.forwarded_room_key to_device event.
+// https://spec.matrix.org/v1.2/client-server-api/#mforwarded_room_key
+type ForwardedRoomKeyEventContent struct {
+	RoomKeyEventContent
+	SenderKey          id.SenderKey `json:"sender_key"`
+	SenderClaimedKey   id.Ed25519   `json:"sender_claimed_ed25519_key"`
+	ForwardingKeyChain []string     `json:"forwarding_curve25519_key_chain"`
+}
+
+type KeyRequestAction string
+
+const (
+	KeyRequestActionRequest = "request"
+	KeyRequestActionCancel  = "request_cancellation"
+)
+
+// RoomKeyRequestEventContent represents the content of a m.room_key_request to_device event.
+// https://spec.matrix.org/v1.2/client-server-api/#mroom_key_request
+type RoomKeyRequestEventContent struct {
+	Body               RequestedKeyInfo `json:"body"`
+	Action             KeyRequestAction `json:"action"`
+	RequestingDeviceID id.DeviceID      `json:"requesting_device_id"`
+	RequestID          string           `json:"request_id"`
+}
+
+type RequestedKeyInfo struct {
+	Algorithm id.Algorithm `json:"algorithm"`
+	RoomID    id.RoomID    `json:"room_id"`
+	SenderKey id.SenderKey `json:"sender_key"`
+	SessionID id.SessionID `json:"session_id"`
+}
+
+type RoomKeyWithheldCode string
+
+const (
+	RoomKeyWithheldBlacklisted  RoomKeyWithheldCode = "m.blacklisted"
+	RoomKeyWithheldUnverified   RoomKeyWithheldCode = "m.unverified"
+	RoomKeyWithheldUnauthorized RoomKeyWithheldCode = "m.unauthorised"
+	RoomKeyWithheldUnavailable  RoomKeyWithheldCode = "m.unavailable"
+	RoomKeyWithheldNoOlmSession RoomKeyWithheldCode = "m.no_olm"
+)
+
+type RoomKeyWithheldEventContent struct {
+	RoomID    id.RoomID           `json:"room_id,omitempty"`
+	Algorithm id.Algorithm        `json:"algorithm"`
+	SessionID id.SessionID        `json:"session_id,omitempty"`
+	SenderKey id.SenderKey        `json:"sender_key"`
+	Code      RoomKeyWithheldCode `json:"code"`
+	Reason    string              `json:"reason,omitempty"`
+}
+
+type DummyEventContent struct{}