fix(ssh): puttygen multi-syntaxe (private-openssh / private-openssh-new) + message GUI explicite si aucune syntaxe ne marche

patch_manager_v2.py

@@ -691,33 +691,53 @@ def load_key(keyfile):
 
     is_ppk = first_line.startswith("PuTTY-User-Key-File-")
     if is_ppk:
-        # Paramiko ne lit pas .ppk nativement → tenter conversion auto via puttygen
+        # Paramiko ne lit pas .ppk nativement → tenter conversion auto via puttygen.
+        # Ordre des syntaxes (de la plus moderne à la plus large) :
+        #   PuTTY 0.74+ : -O private-openssh
+        #   PuTTY 0.75+ : -O private-openssh-new
+        # Avant 0.74 : pas de CLI export → conversion GUI obligatoire.
         converted = keyfile + ".openssh"
         puttygen_paths = [
             r"C:\Program Files\PuTTY\puttygen.exe",
             r"C:\Program Files (x86)\PuTTY\puttygen.exe",
-            "puttygen",  # si dans PATH
+            "puttygen",
             "puttygen.exe",
         ]
+        export_syntaxes = [
+            ["-O", "private-openssh", "-o", converted],
+            ["-O", "private-openssh-new", "-o", converted],
+        ]
         import subprocess
         converted_ok = False
+        last_stderr = ""
         for pg in puttygen_paths:
-            try:
-                subprocess.run(
-                    [pg, keyfile, "-O", "private-openssh", "-o", converted],
-                    check=True, capture_output=True, timeout=10,
-                )
-                converted_ok = True
+            for syntax in export_syntaxes:
+                try:
+                    proc = subprocess.run(
+                        [pg, keyfile] + syntax,
+                        capture_output=True, timeout=10, text=True,
+                    )
+                    if proc.returncode == 0 and os.path.exists(converted):
+                        converted_ok = True
+                        break
+                    last_stderr = (proc.stderr or proc.stdout or "").strip()
+                except (FileNotFoundError, subprocess.SubprocessError, OSError) as ex:
+                    last_stderr = str(ex)
+                    continue
+            if converted_ok:
                 break
-            except (FileNotFoundError, subprocess.SubprocessError, OSError):
-                continue
         if not converted_ok:
             load_key.last_error = (
-                f"Format PuTTY (.ppk) détecté pour {os.path.basename(keyfile)}. "
-                f"Paramiko ne lit pas ce format nativement et puttygen.exe est introuvable. "
-                f"Convertir manuellement : "
-                f'puttygen "{keyfile}" -O private-openssh -o "{keyfile}.openssh" '
-                f"puis pointer la conf vers le fichier converti."
+                f"Format PuTTY (.ppk) détecté pour {os.path.basename(keyfile)}.\n"
+                f"Paramiko ne lit pas ce format. La conversion automatique via puttygen a échoué "
+                f"(version ancienne ou puttygen absent).\n\n"
+                f"Détail dernière tentative : {last_stderr or 'aucun'}\n\n"
+                f"CONVERSION MANUELLE (PuTTYgen GUI, ~30s) :\n"
+                f"  1. Ouvrir puttygen.exe (sans arguments, en GUI)\n"
+                f"  2. Bouton 'Load' → choisir {keyfile}\n"
+                f"  3. Menu 'Conversions' → 'Export OpenSSH key'\n"
+                f"  4. Enregistrer sous '{keyfile.rsplit('.', 1)[0]}' (sans .ppk)\n"
+                f"  5. Dans les paramètres ci-dessous, pointer la clé vers le fichier converti"
             )
             return None
         keyfile = converted