import requests
import sys

def get_subdomains(domain):
    url = f"https://crt.sh/?q=%.{domain}&output=json"
    print(f"[*] Interrogation de crt.sh pour {domain}...")

    try:
        headers = {'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64)'}
        response = requests.get(url, headers=headers, timeout=20)
        
        response.raise_for_status()
        
        data = response.json()
        
        if not data:
            print("[-] Aucun certificat trouvé pour ce domaine.")
            return

        print(f"[+] {len(data)} certificats trouvés (bruts)")

        subdomains = set()
        
        for entry in data:
            name_value = entry.get('name_value', '')
            
            for name in name_value.split('\n'):
                name = name.strip().lower()
                
                if not name.startswith('*.') and name.endswith(domain):
                    subdomains.add(name)

        subdomains = sorted(list(subdomains))

        print("[+] Sous-domaines uniques :")
        for sub in subdomains:
            print(f"    {sub}")

        output_file = f"{domain.replace('.', '_')}_subdomains.txt"
        with open(output_file, 'w', encoding='utf-8') as f:
            for sub in subdomains:
                f.write(f"{sub}\n")

        print(f"[*] Export → {output_file}")

    except requests.exceptions.HTTPError as e:
        print(f"[-] Erreur HTTP de la part de crt.sh (probablement une 502 ou 503) :\n    {e}")
    except requests.exceptions.Timeout:
        print("[-] Erreur : Délai d'attente dépassé (Timeout). crt.sh est trop lent actuellement.")
    except requests.exceptions.RequestException as e:
        print(f"[-] Erreur réseau critique :\n    {e}")
    except ValueError:
        print("[-] Erreur de parsing JSON. crt.sh a probablement renvoyé une page HTML d'erreur.")

if __name__ == "__main__":
    if len(sys.argv) != 2:
        print(f"Usage: python {sys.argv[0]} <domaine>")
        sys.exit(1)

    target_domain = sys.argv[1]
    get_subdomains(target_domain)