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-rw-r--r--src/inbound_group_session.c21
1 files changed, 21 insertions, 0 deletions
diff --git a/src/inbound_group_session.c b/src/inbound_group_session.c
index 82ff66f..65c6018 100644
--- a/src/inbound_group_session.c
+++ b/src/inbound_group_session.c
@@ -29,6 +29,7 @@
#define OLM_PROTOCOL_VERSION 3
+#define GROUP_SESSION_ID_LENGTH ED25519_PUBLIC_KEY_LENGTH
#define PICKLE_VERSION 1
#define SESSION_KEY_VERSION 2
@@ -364,3 +365,23 @@ size_t olm_group_decrypt(
plaintext, max_plaintext_length
);
}
+
+size_t olm_inbound_group_session_id_length(
+ const OlmInboundGroupSession *session
+) {
+ return _olm_encode_base64_length(GROUP_SESSION_ID_LENGTH);
+}
+
+size_t olm_inbound_group_session_id(
+ OlmInboundGroupSession *session,
+ uint8_t * id, size_t id_length
+) {
+ if (id_length < olm_inbound_group_session_id_length(session)) {
+ session->last_error = OLM_OUTPUT_BUFFER_TOO_SMALL;
+ return (size_t)-1;
+ }
+
+ return _olm_encode_base64(
+ session->signing_key.public_key, GROUP_SESSION_ID_LENGTH, id
+ );
+}