1 files changed, 57 insertions, 0 deletions
diff --git a/vendor/maunium.net/go/mautrix/crypto/olm/outboundgroupsession.go b/vendor/maunium.net/go/mautrix/crypto/olm/outboundgroupsession.go
new file mode 100644
index 0000000..c5b7bcb
--- /dev/null
+++ b/vendor/maunium.net/go/mautrix/crypto/olm/outboundgroupsession.go
@@ -0,0 +1,57 @@
+// Copyright (c) 2024 Sumner Evans
+//
+// 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 olm
+
+import "maunium.net/go/mautrix/id"
+
+type OutboundGroupSession interface {
+	// Pickle returns a Session as a base64 string. Encrypts the Session using
+	// the supplied key.
+	Pickle(key []byte) ([]byte, error)
+
+	// Unpickle loads an [OutboundGroupSession] from a pickled base64 string.
+	// Decrypts the [OutboundGroupSession] using the supplied key.
+	Unpickle(pickled, key []byte) error
+
+	// Encrypt encrypts a message using the [OutboundGroupSession]. Returns the
+	// encrypted message as base64.
+	Encrypt(plaintext []byte) ([]byte, error)
+
+	// ID returns a base64-encoded identifier for this session.
+	ID() id.SessionID
+
+	// MessageIndex returns the message index for this session.  Each message
+	// is sent with an increasing index; this returns the index for the next
+	// message.
+	MessageIndex() uint
+
+	// Key returns the base64-encoded current ratchet key for this session.
+	Key() string
+}
+
+var InitNewOutboundGroupSessionFromPickled func(pickled, key []byte) (OutboundGroupSession, error)
+var InitNewOutboundGroupSession func() OutboundGroupSession
+var InitNewBlankOutboundGroupSession func() OutboundGroupSession
+
+// OutboundGroupSessionFromPickled loads an OutboundGroupSession from a pickled
+// base64 string.  Decrypts the OutboundGroupSession using the supplied key.
+// Returns error on failure.  If the key doesn't match the one used to encrypt
+// the OutboundGroupSession then the error will be "BAD_SESSION_KEY".  If the
+// base64 couldn't be decoded then the error will be "INVALID_BASE64".
+func OutboundGroupSessionFromPickled(pickled, key []byte) (OutboundGroupSession, error) {
+	return InitNewOutboundGroupSessionFromPickled(pickled, key)
+}
+
+// NewOutboundGroupSession creates a new outbound group session.
+func NewOutboundGroupSession() OutboundGroupSession {
+	return InitNewOutboundGroupSession()
+}
+
+// NewBlankOutboundGroupSession initialises an empty [OutboundGroupSession].
+func NewBlankOutboundGroupSession() OutboundGroupSession {
+	return InitNewBlankOutboundGroupSession()
+}