diff --git a/sender/sender.py b/sender/sender.py
index 9915251..bfcf195 100644
--- a/sender/sender.py
+++ b/sender/sender.py
@@ -1,15 +1,37 @@
 # 模式，文件，自己的公钥从哪里来，别人的公钥从哪里来
+from encodings.base64_codec import base64_encode
 from entity.Letter import Letter
+from tool import PriKeyHelper
+from tool.PriKeyHelper import getUserKey
+from tool.asymmetric import RSA
 from tool.symmetric.AES import AESUtils
 from tool.symmetric.SM4 import encrypt_ecb, decrypt_cbc_with_iv
 from Crypto.Random import get_random_bytes
 
+
 # 两个变量，记录信封
 letterWay = ""
 letterMode = ""
+letterSymKey = ""
 
 def main():
     # 用户输入各种数据填充letter字段
+    data = "Hello, AES!"
+
+    data, akey = SymEncryption(data)
+
+    Letter.sign = getSign()
+    Letter.encryptType = getEncryptType()
+    Letter.encryptKey = getEncryptKey()
+    Letter.recvPubKey = getRecvPubKey()
+    Letter.senderPubKey = getSenderPubKey()
+
+    print(Letter.sign)
+    print(Letter.encryptType)
+    print(Letter.encryptKey)
+    print(Letter.recvPubKey)
+    print(Letter.senderPubKey)
+
     # 获取用户的公私钥对进行签名
     # 使用对方的公钥进行加密
     # 发送信件
@@ -61,36 +83,72 @@ def selectSymEncryptionChoice():
 
 # 使用对称加密，返回加密后的数据和随机生成的密钥
 def SymEncryption(encryData, key: bytes = None):
+
+    global letterSymKey
     # 获得加密的方法和加密的模式
     way, mode = selectSymEncryptionChoice()
 
     if way == "aes":
         aesUtils = AESUtils(key)
         encryptedData, trueKey = aesUtils.encrypt(encryData, mode=mode)  # 这里encryData要改为文件内容
+        letterSymKey = trueKey
+
         return encryptedData,trueKey
 
     if way == "sm4":
         key = get_random_bytes(16)
         if mode == "ecb":
-            encrypted_data = encrypt_ecb(data, key)
+            encrypted_data = encrypt_ecb(encryData, key)
         # mode 为 cbc
         else:
-            encrypted_data = decrypt_cbc_with_iv(data, key)
+            encrypted_data = decrypt_cbc_with_iv(encryData, key)
+
+        letterSymKey = key
 
         return encrypted_data, key
 
+# 获得签名
+def getSign():
 
-def getKey():
-    pass
+    #计算文件bytes
+    document_bytes = ""
+    priKey, pubKey = PriKeyHelper.getUserKey()
+    signDocuHash = RSA.sign_message(document_bytes, priKey)
+
+    return signDocuHash
+
+def getEncryptType():
+    encryType = f"{letterWay}_{letterMode}".upper()
+
+    return encryType
+
+# 对称密钥，返回的是使用接收方公钥加密后的密钥
+def getEncryptKey():
+    rsaEncrySymKey = RSA.encrypt_message(letterSymKey, getRecvPubKey())
+
+    return rsaEncrySymKey
+
+# 获得接收方的公钥
+def getRecvPubKey():
+    # recPubKey = input("plz input Receiver's Public Key: ")
+    recPubKey = getUserKey()[1]
+    return recPubKey
+
+# 获得发送方的公钥
+def getSenderPubKey():
+    privateKey, publicKey = getUserKey()
+    return publicKey
 
 
 if __name__ == "__main__":
     # 示例数据和密钥
-    data = "Hello, AES!"
-
-    data, akey = SymEncryption(data)
+    # data = "Hello, AES!"
+    #
+    # data, akey = SymEncryption(data)
 
-    print(data,akey)
+    # print(data,akey)
+    #
+    # encryptType = f"{letterWay}_{letterMode}".upper()
+    # print(encryptType)
 
-    encryptType = f"{letterWay}_{letterMode}".upper()
-    print(encryptType)
\ No newline at end of file
+    main()
\ No newline at end of file
diff --git a/tool/asymmetric/RSA.py b/tool/asymmetric/RSA.py
index 652e4f5..542418d 100644
--- a/tool/asymmetric/RSA.py
+++ b/tool/asymmetric/RSA.py
@@ -27,7 +27,7 @@ def encrypt_message(message, public_key_base64):
     public_key = RSA.import_key(public_key_bin)
     # 使用公钥加密消息
     cipher_rsa = PKCS1_OAEP.new(public_key)
-    encrypted_message = cipher_rsa.encrypt(message.encode('utf-8'))
+    encrypted_message = cipher_rsa.encrypt(message)
 
     return binascii.hexlify(encrypted_message).decode('utf-8')