add xmasspirit solve

2021-12-04 01:44:49 +01:00
parent 935da1c9cd
commit 6a66280e54
4 changed files with 73 additions and 10 deletions
--- a/crypto/XMASSpirit/challenge.py
+++ b/crypto/XMASSpirit/challenge.py
@@ -4,17 +4,17 @@ import random
 from math import gcd

 def encrypt(dt):
-	mod = 256
-	while True:
-		a = random.randint(1,mod)
-		if gcd(a, mod) == 1: break
-	b = random.randint(1,mod)
+    mod = 256
+    while True:
+        a = random.randint(1,mod)
+        if gcd(a, mod) == 1: break
+    b = random.randint(1,mod)

-	res = b''
-	for byte in dt:
-		enc = (a*byte + b) % mod
-		res += bytes([enc])
-	return res
+    res = b''
+    for byte in dt:
+        enc = (a*byte + b) % mod
+        res += bytes([enc])
+    return res

 dt = open('letter.pdf', 'rb').read()