fix: [ocr_enrich] Fixed tesseract input format

- It looks like the `image_to_string` method now
  assumes RGB format and the `imdecode` method
  seems to give BGR format, so we convert the
  image array before

misp_modules/modules/expansion/ocr_enrich.py

@@ -6,14 +6,21 @@ import pytesseract
 
 misperrors = {'error': 'Error'}
 mispattributes = {'input': ['attachment'],
-                  'output': ['freetext', 'text']}
-moduleinfo = {'version': '0.1', 'author': 'Sascha Rommelfangen',
+                  'output': ['freetext']}
+moduleinfo = {'version': '0.2', 'author': 'Sascha Rommelfangen',
               'description': 'OCR decoder',
               'module-type': ['expansion']}
 
 moduleconfig = []
 
 
+def filter_decoded(decoded):
+    for line in decoded.split('\n'):
+        decoded_line = line.strip('\t\x0b\x0c\r ')
+        if decoded_line:
+            yield decoded_line
+
+
 def handler(q=False):
     if q is False:
         return False
@@ -31,9 +38,16 @@ def handler(q=False):
     image = img_array
     image = cv2.imdecode(img_array, cv2.IMREAD_COLOR)
     try:
-        decoded = pytesseract.image_to_string(image)
-        return {'results': [{'types': ['freetext'], 'values': decoded, 'comment': "OCR from file " + filename},
-                {'types': ['text'], 'values': decoded, 'comment': "ORC from file " + filename}]}
+        decoded = pytesseract.image_to_string(cv2.cvtColor(image, cv2.COLOR_BGR2RGB))
+        return {
+            'results':[
+                {
+                    'types': ['freetext'],
+                    'values': list(filter_decoded(decoded)),
+                    'comment': f"OCR from file {filename}"
+                }
+            ]
+        }
     except Exception as e:
         print(e)
         err = "Couldn't analyze file type. Only images are supported right now."