From 07e667e29883740aa0b82199cf0518a2e2684e26 Mon Sep 17 00:00:00 2001
From: Patrick
Date: Thu, 20 Jul 2023 23:15:26 +0200
Subject: cli send encrypted & manage megolm session, save/load megolm sessions

---
 src/matrix.c | 88 +++++++++++++++++++++++++++++++++++++++++++++---------------
 src/matrix.h | 14 +++++++++-
 2 files changed, 80 insertions(+), 22 deletions(-)

(limited to 'src')

diff --git a/src/matrix.c b/src/matrix.c
index 80802c3..fa7303f 100644
--- a/src/matrix.c
+++ b/src/matrix.c
@@ -226,6 +226,67 @@ MatrixMegolmOutSessionEncrypt(
     return res != olm_error();
 }
 
+bool
+MatrixMegolmOutSessionSave(
+    MatrixMegolmOutSession * session,
+    const char * filename,
+    const char * key)
+{
+    FILE * f = fopen(filename, "w");
+
+    size_t roomIdLen = strlen(session->roomId);
+    fwrite(&roomIdLen, sizeof(size_t), 1, f);
+    fwrite(session->roomId, 1, roomIdLen, f);
+
+    size_t pickleBufferLen =
+        olm_pickle_outbound_group_session_length(
+            session->session);
+    void * pickleBuffer = malloc(pickleBufferLen);
+
+    olm_pickle_outbound_group_session(
+        session->session,
+        key, strlen(key),
+        pickleBuffer, pickleBufferLen);
+    
+    fwrite(&pickleBufferLen, sizeof(size_t), 1, f);
+    fwrite(pickleBuffer, 1, pickleBufferLen, f);
+    free(pickleBuffer);
+
+    fclose(f);
+
+    return true;
+}
+
+bool
+MatrixMegolmOutSessionLoad(
+    MatrixMegolmOutSession * session,
+    const char * filename,
+    const char * key)
+{
+    FILE * f = fopen(filename, "r");
+
+    size_t roomIdLen;
+    fread(&roomIdLen, sizeof(size_t), 1, f);
+    fread(session->roomId, 1, roomIdLen, f);
+
+    size_t pickleBufferLen;
+    fread(&pickleBufferLen, sizeof(size_t), 1, f);
+
+    void * pickleBuffer = malloc(pickleBufferLen);
+    fread(pickleBuffer, 1, pickleBufferLen, f);
+
+    olm_unpickle_outbound_group_session(
+        session->session,
+        key, strlen(key),
+        pickleBuffer, pickleBufferLen);
+    
+    free(pickleBuffer);
+
+    fclose(f);
+
+    return true;
+}
+
 
 
 bool
@@ -315,14 +376,9 @@ MatrixClientSetAccessToken(
     MatrixClient * client,
     const char * accessToken)
 {
-    int accessTokenLen = strlen(accessToken);
-
-    if (accessTokenLen > ACCESS_TOKEN_SIZE - 1)
-        return false;
-
-    for (int i = 0; i < accessTokenLen; i++)
+    for (int i = 0; i < ACCESS_TOKEN_SIZE-1; i++)
         client->accessToken[i] = accessToken[i];
-    client->accessToken[accessTokenLen] = '\0';
+    client->accessToken[ACCESS_TOKEN_SIZE-1] = '\0';
 
     return true;
 }
@@ -332,14 +388,9 @@ MatrixClientSetDeviceId(
     MatrixClient * client,
     const char * deviceId)
 {
-    int deviceIdLen = strlen(deviceId);
-
-    if (deviceIdLen > DEVICE_ID_SIZE - 1)
-        return false;
-
-    for (int i = 0; i < deviceIdLen; i++)
+    for (int i = 0; i < DEVICE_ID_SIZE-1; i++)
         client->deviceId[i] = deviceId[i];
-    client->deviceId[deviceIdLen] = '\0';
+    client->deviceId[DEVICE_ID_SIZE-1] = '\0';
 
     return true;
 }
@@ -349,14 +400,9 @@ MatrixClientSetUserId(
     MatrixClient * client,
     const char * userId)
 {
-    int userIdLen = strlen(userId);
-
-    if (userIdLen > USER_ID_SIZE - 1)
-        return false;
-
-    for (int i = 0; i < userIdLen; i++)
+    for (int i = 0; i < USER_ID_SIZE-1; i++)
         client->userId[i] = userId[i];
-    client->userId[userIdLen] = '\0';
+    client->userId[USER_ID_SIZE-1] = '\0';
 
     return true;
 }
diff --git a/src/matrix.h b/src/matrix.h
index 91ed208..073f610 100644
--- a/src/matrix.h
+++ b/src/matrix.h
@@ -115,13 +115,25 @@ bool
 MatrixMegolmOutSessionInit(
     MatrixMegolmOutSession * session,
     const char * roomId);
-    
+
 bool
 MatrixMegolmOutSessionEncrypt(
     MatrixMegolmOutSession * session,
     const char * plaintext,
     char * outBuffer, int outBufferCap);
 
+bool
+MatrixMegolmOutSessionSave(
+    MatrixMegolmOutSession * session,
+    const char * filename,
+    const char * key);
+    
+bool
+MatrixMegolmOutSessionLoad(
+    MatrixMegolmOutSession * session,
+    const char * filename,
+    const char * key);
+
 
 // Matrix Client
 
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