Merge pull request #661 from RC2208/master

Check Password strength

Author: smv1999

Passwords/password_strength_checker.py

@@ -0,0 +1,42 @@
+#program to check password strength. A strong password needs to be at least 8 chars long, have both upper and lowercase chars and have some special characters as well.
+import string
+
+def Strength(password):
+     
+    n = len(password)
+
+    hasLower = False
+    hasUpper = False
+    hasDigit = False
+    specialChar = False
+    p = string.ascii_letters + string.digits  #contains all alphabets(in lower & upper case) and digits (0-9)
+
+    for i in range(n):
+        if password[i].islower():
+            hasLower = True
+        if password[i].isupper():
+            hasUpper = True
+        if password[i].isdigit():
+            hasDigit = True
+        if password[i] not in p:
+            specialChar = True
+ 
+    # Strength of password calculation.
+
+    print("Strength of password:-", end = "")
+    if (hasLower and hasUpper and
+        hasDigit and specialChar and n >= 8):
+        print("Strong")
+         
+    elif ((hasLower or hasUpper) and
+          specialChar and n >= 6):
+        print("Moderate")
+    else:
+        print("Weak")
+ 
+
+if __name__=="__main__":
+     
+    password = input("Enter password: ")
+     
+    Strength(password)