diff --git a/utils/ldapcertfs.py b/utils/ldapcertfs.py
index ceeade11..d614fdc6 100755
--- a/utils/ldapcertfs.py
+++ b/utils/ldapcertfs.py
@@ -341,14 +341,14 @@ class LdapCertFS(fuse.Fuse):
         data = ""
         for dtype in self.files[file]['file']:
             if dtype == "chain":
-                if cert['issuerCN'][0] in self.chain:
+                if 'x509Cert' in cert['objectClass'] and cert['issuerCN'][0] in self.chain:
                     if 'path' in self.chain[str(cert['issuerCN'][0])]:
                         data += open(self.chain[str(cert['issuerCN'][0])]['path']).read()
                     elif 'content' in self.chain[str(cert['issuerCN'][0])]:
                         data += self.chain[str(cert['issuerCN'][0])]['content']
                 else:
                     return None
-            elif dtype == "certificat":
+            elif dtype == "certificat" and 'x509Cert' in cert['objectClass']:
                 data+=ssl.DER_cert_to_PEM_cert(str(cert['certificat'][0]))
             elif dtype == "privatekey":
                 if "privateKey" in cert['objectClass'] and cert['privatekey'] and not self.nopkey:
@@ -543,12 +543,12 @@ def main(usage):
     ldap_filter = 'self'
 
     # Récupération de l'option decrypt
-    if '--decrypt' in sys.argv[2:]:
+    if '--decrypt' in sys.argv[1:]:
         decrypt=True
         del(sys.argv[sys.argv.index('--decrypt')])
 
     # Récupération de l'option nopkey
-    if '--nopkey' in sys.argv[2:]:
+    if '--nopkey' in sys.argv[1:]:
         nopkey=True
         del(sys.argv[sys.argv.index('--nopkey')])