change user password func

goodchain/src/helpers/DatabaseHelper.py

@@ -62,12 +62,12 @@ class DatabaseHelper:
             print(error)
             return False
 
-    def changePasswordUser(self, user_privatekey, password):
+    def changePassword(self, user_privatekey, old_password, password):
         if not self.conn:
             return None
 
         try:
-            self.cursor.execute("UPDATE `users` SET `password` = ? WHERE `private_key` = ?", (password, user_privatekey,))
+            self.cursor.execute("UPDATE `users` SET `password` = ? WHERE (`private_key` = ? AND `password` = ?)", (password, user_privatekey, old_password,))
             self.commit()
 
             return True

goodchain/src/helpers/MenuHelper.py

@@ -44,7 +44,7 @@ class MenuHelper:
         self.user_settings_menu[1] = "View account info"
         self.user_settings_menu[2] = "Change username"
         self.user_settings_menu[3] = "Change password"
-        self.user_settings_menu[3] = "DELETE ACCOUNT"
+        self.user_settings_menu[4] = "DELETE ACCOUNT"
 
         self.opened_logs = False
 
@@ -106,7 +106,7 @@ class MenuHelper:
                     user = None
 
                 case "User Settings":
-                    print(user.private_key)
+                    self.runUserSettingsMenu(user)
 
                 case "Blockchain":
                     self.runUserBlockchainMenu(user)
@@ -167,7 +167,7 @@ class MenuHelper:
                     print("TODO")
 
                 case "Change password":
-                    print("TODO")
+                    user.updatePassword()
 
                 case "DELETE ACCOUNT":
                     print("TODO")

goodchain/src/helpers/SignatureHelper.py

@@ -0,0 +1,40 @@
+from cryptography.exceptions import *
+from cryptography.hazmat.primitives.asymmetric import rsa
+from cryptography.hazmat.primitives import serialization
+
+def generateKeys():
+    private_key = rsa.generate_private_key(public_exponent=65537,key_size=2048)
+    public_key = private_key.public_key()
+
+    return private_key, public_key
+
+def keysToBytes(private_key, public_key):
+    prv_ser = privateKeyToBytes(private_key)
+    pbc_ser = publicKeyToBytes(public_key)
+    
+    return prv_ser, pbc_ser
+
+def publicKeyToBytes(public_key):
+    pbc_ser = public_key.public_bytes(
+        encoding=serialization.Encoding.PEM,
+        format=serialization.PublicFormat.SubjectPublicKeyInfo)
+    
+    return pbc_ser
+
+def privateKeyToBytes(private_key):
+    prv_ser = private_key.private_bytes(
+        encoding=serialization.Encoding.PEM,
+        format=serialization.PrivateFormat.TraditionalOpenSSL,
+        encryption_algorithm=serialization.NoEncryption())
+    
+    return prv_ser
+
+def bytesToKeys(private_ser, public_ser):
+    private_key = serialization.load_pem_private_key(
+        private_ser,
+        password=None
+    )
+    public_key = serialization.load_pem_public_key(
+        public_ser
+    )
+    return private_key, public_key

goodchain/src/helpers/UtilityHelper.py

@@ -0,0 +1,10 @@
+from cryptography.hazmat.backends import default_backend
+from cryptography.hazmat.primitives import hashes
+
+import hashlib
+
+def computeHash(data):
+    hash = hashlib.sha256()
+    data = str(data).encode()
+    hash.update(data)
+    return hash.hexdigest()