Added libs

fspn/utils/sha256_util.py

@@ -0,0 +1,67 @@
+import hashlib
+
+def hash_file(filepath):
+    BUF_SIZE = 65 * 1024
+
+    sha = hashlib.sha256()
+
+    with open(filepath, 'rb') as f:
+        while True:
+            data = f.read(BUF_SIZE)
+            if not data:
+                break
+            sha.update(data)
+    return sha.hexdigest()
+
+def hash_bytes(data):
+    sha = hashlib.sha256()
+    sha.update(data)
+    return sha.hexdigest()
+
+def hash_string(data:str): 
+    sha = hashlib.sha256() 
+    sha.update(str(data).encode('utf-8')) 
+    return sha.hexdigest()
+
+# ---------------
+import datetime
+import string
+import itertools
+import random
+
+def get_nonce(characters, lenght):
+    yield from itertools.product(*([characters] * lenght)) 
+
+def count_leading_zeros(text):
+    n = 0
+    for i in range(len(text)):
+        if text[:i] == "0" * i:
+            n = i
+        else:
+            break
+    return n
+
+def mine_user(data, force=4, nonce_lenght=4):
+    characters = '[@_!#$%^&*()<>?/\|}{~:]'+string.ascii_letters+string.digits
+    while True: 
+        for x in get_nonce(characters, nonce_lenght):
+            nonce = ''.join(x)+random.choice(characters)
+            hash = hash_string(data+ nonce)
+            leading_zeros = count_leading_zeros(hash)
+            if leading_zeros >= force:
+                return nonce
+        
+
+def test():
+    print(datetime.datetime.now(), "EXECUTING HASH TEST - MINE USER")
+    public_key_str = "A4DZSk+TlR+4w39MbiIAQbti+N0H1QlJEhRH2DI6Iubj"
+    nonce, hash = mine_user(public_key_str)
+
+    print(nonce, hash)
+    
+# test()
+
+# A4DZSk+TlR+4w39MbiIAQbti+N0H1QlJEhRH2DI6Iubj
+# 8
+# eYnU*@
+# [/Q#7r