1 files changed, 80 insertions, 0 deletions
diff --git a/vendor/maunium.net/go/mautrix/crypto/olm/inboundgroupsession.go b/vendor/maunium.net/go/mautrix/crypto/olm/inboundgroupsession.go
new file mode 100644
index 0000000..8839b48
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+++ b/vendor/maunium.net/go/mautrix/crypto/olm/inboundgroupsession.go
@@ -0,0 +1,80 @@
+// 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 InboundGroupSession interface {
+	// Pickle returns an InboundGroupSession as a base64 string.  Encrypts the
+	// InboundGroupSession using the supplied key.
+	Pickle(key []byte) ([]byte, error)
+
+	// Unpickle loads an [InboundGroupSession] from a pickled base64 string.
+	// Decrypts the [InboundGroupSession] using the supplied key.
+	Unpickle(pickled, key []byte) error
+
+	// Decrypt decrypts a message using the [InboundGroupSession]. Returns the
+	// plain-text and message index on success.  Returns error on failure.  If
+	// the base64 couldn't be decoded then the error will be "INVALID_BASE64".
+	// If the message is for an unsupported version of the protocol then the
+	// error will be "BAD_MESSAGE_VERSION".  If the message couldn't be decoded
+	// then the error will be BAD_MESSAGE_FORMAT".  If the MAC on the message
+	// was invalid then the error will be "BAD_MESSAGE_MAC".  If we do not have
+	// a session key corresponding to the message's index (ie, it was sent
+	// before the session key was shared with us) the error will be
+	// "OLM_UNKNOWN_MESSAGE_INDEX".
+	Decrypt(message []byte) ([]byte, uint, error)
+
+	// ID returns a base64-encoded identifier for this session.
+	ID() id.SessionID
+
+	// FirstKnownIndex returns the first message index we know how to decrypt.
+	FirstKnownIndex() uint32
+
+	// IsVerified check if the session has been verified as a valid session.
+	// (A session is verified either because the original session share was
+	// signed, or because we have subsequently successfully decrypted a
+	// message.)
+	IsVerified() bool
+
+	// Export returns the base64-encoded ratchet key for this session, at the
+	// given index, in a format which can be used by
+	// InboundGroupSession.InboundGroupSessionImport().  Encrypts the
+	// InboundGroupSession using the supplied key.  Returns error on failure.
+	// if we do not have a session key corresponding to the given index (ie, it
+	// was sent before the session key was shared with us) the error will be
+	// "OLM_UNKNOWN_MESSAGE_INDEX".
+	Export(messageIndex uint32) ([]byte, error)
+}
+
+var InitInboundGroupSessionFromPickled func(pickled, key []byte) (InboundGroupSession, error)
+var InitNewInboundGroupSession func(sessionKey []byte) (InboundGroupSession, error)
+var InitInboundGroupSessionImport func(sessionKey []byte) (InboundGroupSession, error)
+var InitBlankInboundGroupSession func() InboundGroupSession
+
+// InboundGroupSessionFromPickled loads an InboundGroupSession from a pickled
+// base64 string. Decrypts the InboundGroupSession using the supplied key.
+// Returns error on failure.
+func InboundGroupSessionFromPickled(pickled, key []byte) (InboundGroupSession, error) {
+	return InitInboundGroupSessionFromPickled(pickled, key)
+}
+
+// NewInboundGroupSession creates a new inbound group session from a key
+// exported from OutboundGroupSession.Key(). Returns error on failure.
+func NewInboundGroupSession(sessionKey []byte) (InboundGroupSession, error) {
+	return InitNewInboundGroupSession(sessionKey)
+}
+
+// InboundGroupSessionImport imports an inbound group session from a previous
+// export. Returns error on failure.
+func InboundGroupSessionImport(sessionKey []byte) (InboundGroupSession, error) {
+	return InitInboundGroupSessionImport(sessionKey)
+}
+
+func NewBlankInboundGroupSession() InboundGroupSession {
+	return InitBlankInboundGroupSession()
+}