Add existing scripts.

hash.py

@@ -0,0 +1,51 @@
+#!/usr/bin/env python3
+
+import hashlib
+import sys
+import time
+import getpass
+
+
+def get_input():
+    total_count = 0
+    while not total_count:
+        try:
+            total_count = int(float(input("Enter count: ")))
+        except ValueError:
+            print("Enter a positive integer.")
+
+    seed, seed_check = "a", "b"
+    while seed != seed_check:
+        seed = getpass.getpass()
+        seed_check = getpass.getpass(prompt="Confirm password: ")
+        if seed != seed_check:
+            print("Passwords must match.")
+    return total_count, seed
+
+
+def print_progress(total_count, passed_time, current_count):
+    projected_time = total_count * passed_time / current_count
+    progress_time = "[{:.2f} / {:.2f}s".format(passed_time, projected_time)
+    progress_percent = current_count / total_count * 100
+    progress_percent = "- {:.2f}%]".format(progress_percent)
+    print(progress_time, progress_percent, "   ", end='\r')
+
+
+if __name__ == "__main__":
+    total_count, seed = get_input()
+
+    start_time = time.time()
+    current_time = start_time
+    m = hashlib.sha256()
+    m.update(seed.encode())
+
+    for current_count in range(total_count):
+        if time.time() - current_time > 1:
+            current_time = time.time()
+            passed_time = current_time - start_time
+            print_progress(total_count, passed_time, current_count)
+        m.update(m.digest())
+
+    print("{} hashes done. Final result:".format(total_count))
+    print(m.hexdigest())
+