预期解

crypto/easy_pow/crack.py

@@ -0,0 +1,25 @@
+import hashlib
+import itertools
+from pwn import *
+import string
+
+context.log_level = 'debug'
+
+r = remote("localhost",10001)
+
+strings=r.recvline().decode('utf-8')
+alpha_bet = string.ascii_letters+string.digits
+strlist = itertools.permutations(alpha_bet, 4)
+obj = re.search('\w{64}', strings)[0]
+obj2 = re.search('\w{16}', strings)[0]
+
+for i in strlist:
+    data=i[0]+i[1]+i[2]+i[3]+obj2
+    data_sha=hashlib.sha256(data.encode('utf-8')).hexdigest()
+    if(data_sha==obj):
+        print(data[:4])
+        r.sendline(data[:4].encode())
+        break
+r.recvline()
+r.recvline()
+r.close()