1 files changed, 83 insertions, 0 deletions
diff --git a/vendor/maunium.net/go/mautrix/crypto/olm/session.go b/vendor/maunium.net/go/mautrix/crypto/olm/session.go
new file mode 100644
index 0000000..c4b91ff
--- /dev/null
+++ b/vendor/maunium.net/go/mautrix/crypto/olm/session.go
@@ -0,0 +1,83 @@
+// 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 Session interface {
+	// Pickle returns a Session as a base64 string. Encrypts the Session using
+	// the supplied key.
+	Pickle(key []byte) ([]byte, error)
+
+	// Unpickle loads a Session from a pickled base64 string. Decrypts the
+	// Session using the supplied key.
+	Unpickle(pickled, key []byte) error
+
+	// ID returns an identifier for this Session. Will be the same for both
+	// ends of the conversation.
+	ID() id.SessionID
+
+	// HasReceivedMessage returns true if this session has received any
+	// message.
+	HasReceivedMessage() bool
+
+	// MatchesInboundSession checks if the PRE_KEY message is for this in-bound
+	// Session. This can happen if multiple messages are sent to this Account
+	// before this Account sends a message in reply. Returns true if the
+	// session matches. Returns false if the session does not match. Returns
+	// error on failure. If the base64 couldn't be decoded then the error will
+	// be "INVALID_BASE64". If the message was for an unsupported protocol
+	// version then the error will be "BAD_MESSAGE_VERSION". If the message
+	// couldn't be decoded then then the error will be "BAD_MESSAGE_FORMAT".
+	MatchesInboundSession(oneTimeKeyMsg string) (bool, error)
+
+	// MatchesInboundSessionFrom checks if the PRE_KEY message is for this
+	// in-bound Session. This can happen if multiple messages are sent to this
+	// Account before this Account sends a message in reply. Returns true if
+	// the session matches. Returns false if the session does not match.
+	// Returns error on failure. If the base64 couldn't be decoded then the
+	// error will be "INVALID_BASE64". If the message was for an unsupported
+	// protocol version then the error will be "BAD_MESSAGE_VERSION". If the
+	// message couldn't be decoded then then the error will be
+	// "BAD_MESSAGE_FORMAT".
+	MatchesInboundSessionFrom(theirIdentityKey, oneTimeKeyMsg string) (bool, error)
+
+	// EncryptMsgType returns the type of the next message that Encrypt will
+	// return. Returns MsgTypePreKey if the message will be a PRE_KEY message.
+	// Returns MsgTypeMsg if the message will be a normal message.
+	EncryptMsgType() id.OlmMsgType
+
+	// Encrypt encrypts a message using the Session. Returns the encrypted
+	// message as base64.
+	Encrypt(plaintext []byte) (id.OlmMsgType, []byte, error)
+
+	// Decrypt decrypts a message using the Session. Returns the plain-text 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".
+	Decrypt(message string, msgType id.OlmMsgType) ([]byte, error)
+
+	// Describe generates a string describing the internal state of an olm
+	// session for debugging and logging purposes.
+	Describe() string
+}
+
+var InitSessionFromPickled func(pickled, key []byte) (Session, error)
+var InitNewBlankSession func() Session
+
+// SessionFromPickled loads a Session from a pickled base64 string.  Decrypts
+// the Session using the supplied key.  Returns error on failure.
+func SessionFromPickled(pickled, key []byte) (Session, error) {
+	return InitSessionFromPickled(pickled, key)
+}
+
+func NewBlankSession() Session {
+	return InitNewBlankSession()
+}