add exception for no connection to the password or mail api

build.sh

@@ -2,4 +2,4 @@
 
 mkdir -p build
 cd build
-pyinstaller --distpath=../dist --workpath=../build ../src/have_I_b33n_pwned.py
+pyinstaller --distpath=../dist --workpath=../build -y ../src/have_I_b33n_pwned.py

src/have_I_b33n_pwned.py

@@ -21,82 +21,83 @@
 # along with this program. If not, see <http://www.gnu.org/licenses/>.
 # updater script for nextcloud
 #
-# TODO
+#TODO
 # - add feature: keepass integration? isnt there something like this already?
+# - handle mail API exeption more precisely
 
 
+from os import name
 from sys import argv, stdout, exit
+from re import match
 from argparse import ArgumentParser
 from hashlib import sha1
 from getpass import getpass
-from requests import get
+import requests
 
 
-RED   = "\033[1;31m"
-GREEN = "\033[0;32m"
-RESET = "\033[0;0m"
-API   = 'https://api.pwnedpasswords.com/range/'
-API_MAIL = 'https://haveibeenpwned.com/api/v2/breachedaccount/'
-ROW   = '{:<30}{:<10}{:<45}'
-HIDDEN = False
+if name == 'nt':  # disable colors for windows environment
+    (RED, GREEN, RESET) = ("", "", "")
+else:
+    (RED, GREEN, RESET) = ("\033[1;31m", "\033[0;32m", "\033[0;0m")
+
+PASSWORD_API = 'https://api.pwnedpasswords.com/range/'
+MAIL_API = 'https://haveibeenpwned.com/api/v2/breachedaccount/'
+ROW = '{:<30}{:<10}{:<45}'
+HIDDEN = True
+INFINITE = True
 
 
 parser = ArgumentParser(
     description='Check if your email or password appears in a data leak.',
-    epilog='Moritz Münch, moritzmuench@mailbox.org, willipink.eu, GPL3+'
-)
-parser.add_argument('-m', '-mail', '--mail',
-    metavar='foo@adress.bar',
-    nargs='+',
-    help='Email address which should be checked against the leak database.'
-)
-parser.add_argument('-p', '-password', '--password',
-    metavar='password',
-    nargs='+',
-    help='Password which should be checked against the leak database.'
-)
+    epilog='Moritz Münch, moritzmuench@mailbox.org, willipink.eu, GPL3+')
+parser.add_argument('input',
+    nargs='*',
+    metavar='password or mail adress',
+    help='''You can specify passwords and mail adresses seperated by spaces.
+    If the password contains a space you have to enclose it in quotes like ' or
+    "''')
+parser.add_argument('-s', '-show', '--show',
+        nargs='?',
+        help='Show entered in leak summary')
 args = parser.parse_args()
+if args.show:
+    HIDDEN = False
 
 
-
-def header():
-    print()
-    print(ROW.format('password', 'leaked', 'sha1'))
-    print('-' * 80)
-
-
-def prompt_password_or_mail():
-    print()
-    while True:
-        choice = input('Do you wannt to check a password [p] or an email adress [e]: ')
-        if choice == 'p':
-            prompt_password()
-        elif choice == 'e':
-            prompt_mail()
-
-
-def prompt_password():
-    print()
-    password = getpass('Tell me your password: ')
+def input_prompt():
     global HIDDEN
-    HIDDEN = True
-    header()
-    query_password(password)
+    if HIDDEN:
+        user_input = getpass('Tell me your password or mail adress: ')
+    else:
+        user_input = input('Tell me your password or mail adress: ')
+    check_mail_or_password(user_input)
 
 
-def prompt_mail():
-    print()
-    mail = input('Tell me your mail adress: ')
-    global HIDDEN
-    HIDDEN = True
-    header()
-    query_mail(mail)
+def check_mail_or_password(user_input):
+    valid_mail = match(r'^[a-zA-Z0-9_.+-]+@[a-zA-Z0-9-]+\.[a-zA-Z0-9-.]+$', user_input)
+    if valid_mail:
+        query_mail(valid_mail.group())
+    else:
+        query_password(user_input)
+
+
+def no_connection_to(url):
+    ''' Warn about no connection to *url* and exit '''
+    stdout.write(RED)
+    print('Could not connect to {}, please check your internet connection'.format(url))
+    stdout.write(RESET)
+    exit(1)
 
 
 def query_password(password):
+    ''' Query the first 5 digits of the sha1 hash of the user input
+    ti the haveibeenpwned.com api. '''
     password_hash = sha1(password.encode('UTF-8')).hexdigest().upper()
     request = password_hash[:5]
-    response = get(API + request).text
+    try:
+        response = requests.get(PASSWORD_API + request).text
+    except requests.exceptions.ConnectionError:
+        no_connection_to(PASSWORD_API)
     hash_searched = 'not yet'
     for answer in response.splitlines():
         data = answer.split(':')
@@ -104,26 +105,23 @@ def query_password(password):
         if password_hash == combined_hash:
             hash_searched = int(data[1])
             break
-
     if hash_searched == 'not yet':
         stdout.write(GREEN)
     else:
         stdout.write(RED)
-
     if HIDDEN:
         password = '*' * len(password)
-
+    print(ROW.format('password', 'leaked', 'sha1'))
+    print('-' * 80)
     print(ROW.format(password, hash_searched, password_hash))
     stdout.write(RESET)
-
-    if HIDDEN:
-        prompt_password_or_mail()
+    if INFINITE:
+        input_prompt()
 
 
 def query_mail(mail):
-    print()
     try:
-        response = get(API_MAIL + mail).json()
+        response = requests.get(MAIL_API + mail).json()
         for breach in response:
             print('Name: {}'.format(breach['Name']))
             print('Title: {}'.format(breach['Title']))
@@ -133,28 +131,27 @@ def query_mail(mail):
             print('Modified date: {}'.format(breach['ModifiedDate']))
             print('Pwn count: {}'.format(breach['PwnCount']))
             print('Description: {}'.format(breach['Description']))
+            stdout.write(RED)
             print('Breached data: {}'.format(', '.join([data for data in breach['DataClasses']])))
+            stdout.write(RESET)
             print('Verified: {}'.format('yes' if breach['IsVerified'] == 1 else 'No'))
             print('Fabricated: {}'.format('yes' if breach['IsFabricated'] == 1 else 'No'))
             print('Sensitive: {}'.format('yes' if breach['IsSensitive'] == 1 else 'No'))
             print('Retired: {}'.format('yes' if breach['IsRetired'] == 1 else 'No'))
             print('Spam: {}'.format('yes' if breach['IsSpamList'] == 1 else 'No'))
+    except requests.exceptions.ConnectionError:
+        no_connection_to(MAIL_API)
     except:
-        print('The mail adress {} was not found in any leak databases so far'.format(mail))
-
-    if HIDDEN:
-        prompt_password_or_mail()
+        stdout.write(GREEN)
+        print('The mail adress {} is not in the leak database.'.format(mail))
+        stdout.write(RESET)
+    query_password(mail)
 
 
 if __name__ == '__main__':
-    if args.password:
-        header()
-        for password in args.password:
-            query_password(password)
-    elif args.mail:
-        for mail in args.mail:
-            query_mail(mail)
+    if args.input:
+        for user_input in args.input:
+            check_mail_or_password(user_input)
     else:
-        prompt_password_or_mail()
-    print()
-    exit(0)
+        INFINITE = True
+        input_prompt()