From 36be343c8790c983bcb2382c0600556d808359e2 Mon Sep 17 00:00:00 2001
From: pcfkh8sw5 <qidangge@163.com>
Date: Sun, 25 Dec 2022 17:39:18 +0800
Subject: [PATCH] ADD file via upload

---
 AES_OFB.py | 59 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 59 insertions(+)
 create mode 100644 AES_OFB.py

diff --git a/AES_OFB.py b/AES_OFB.py
new file mode 100644
index 0000000..629ffd0
--- /dev/null
+++ b/AES_OFB.py
@@ -0,0 +1,59 @@
+from binascii import b2a_hex, a2b_hex
+from Crypto.Cipher import AES
+from Crypto import Random
+import time  # 引入time模块
+iv = Random.new().read(AES.block_size)
+
+
+
+class aestest():
+    # ***********Begin**************
+    def __init__(self, key):
+        self.key = key.encode('utf-8')
+
+    def encrypt(self, text):
+        text = text.encode('utf-8')
+        aes = AES.new(self.key, AES.MODE_OFB,iv)  # 这里是直接调用函数AES.new，参数是密钥和ECB模式设置。初始化加密器
+        ctext = aes.encrypt(text)  # 加密
+
+        return ctext
+
+    def decrypt(self, text):
+        text = text.encode('utf-8')
+        aes = AES.new(self.key, AES.MODE_OFB,iv)
+        plain = aes.decrypt(a2b_hex(text))
+        return plain
+
+
+# ************End***************
+
+def Evidence(text, key):
+    aes = aestest(key)
+    text = text.encode('utf-8')
+    T1 = time.time()
+    for i in range(100000):
+        enc = aes.encrypt(text)
+    T2 = time.time()
+    # print(T2-T1)
+    T_e = T2-T1 #加密要的时间
+    enc = b2a_hex(enc)  # 字符串转换
+    T3 = time.time()
+    for i in range(100000):
+        detext = aes.decrypt(enc)
+    T4 = time.time()
+    # print(T4-T3)
+    T_d = T4 - T3 #解密要的时间
+    return T_e,T_d
+
+
+if __name__ == "__main__":
+    # str1, str2 = input().split()
+    # Evidence(str1, str2)
+    test = {16:'1234567812345678',24:'123456781234567812345678',32:'12345678123456781234567812345678'}
+    for b,str2 in test.items():
+        T_e = Evidence('xyqshiyigedasgya', str2)[0]
+        T_d = Evidence('xyqshiyigedasgya', str2)[1]
+        print(str(b)+'位的加密时间是'+str(T_e)+"      它加密的数据是"+str2)
+        print('它的加密效率是'+str(12.8/T_e)+' Mbps')
+        print(str(b) + '位的解密时间是' + str(T_d))
+        print('它的解密效率是' + str(12.8 / T_d) + ' Mbps')