ADD file via upload

ECB_attrack.py

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+import socket
+import re
+
+host = '110.41.145.99'
+port = 8005
+def Tostr(st):
+    return st.encode(encoding='UTF8')
+
+def connect():
+    s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+    s.connect((host,port))
+    return s
+
+def getCliphertext(data):
+    p1 = r"(>)(.*?)(\r\n)"
+    pattern1 = re.compile(p1)
+    data = pattern1.findall(data)[0][1]
+    return data
+
+def get_pad_len(s):
+    s.recv(1024)
+    for i in range(1,16):
+        payload1 = "encrypt "+'a'*i
+        s.send(Tostr(payload1))
+        data = (s.recv(1024)).decode('utf-8')
+        data = getCliphertext(data)
+        if i==1:
+            slen = len(data)
+        if len(data)>slen:
+            break
+    return i-1
+
+def forcerFlag(s,slen):
+    padd = 'a'*(slen+1)
+    plaintext = ""
+    print("start...")
+    array = "`1234567890-=+qwertyuiop[]asdfghjkl;'zxcvbnm,./?<>!@#$%^&*()QWERTYUIOP{}ASDFGHJKLZXCVBNM:"
+    for i in range(19):
+        for ch in array:
+            payload2 = "encrypt "+ch+plaintext+'*'*15+padd
+            s.send(Tostr(payload2))
+            data = (s.recv(1024)).decode('utf-8')
+            data = getCliphertext(data)
+            bp = data[:32]
+            sec = data[96:128]
+            if bp==sec:
+                plaintext = ch +plaintext
+                print(plaintext)
+                break
+    return plaintext
+
+def exp():
+    s = connect()
+    slen = get_pad_len(s)
+    plaintext = forcerFlag(s,slen)
+    print(plaintext)
+
+if __name__ == '__main__':
+    exp()