pip install pycryptodome

from Crypto.PublicKey import RSA
from Crypto.Random import get_random_bytes

# 生成RSA密鑰對(duì)
key = RSA.generate(2048)  # 生成2048位的密鑰

# 導(dǎo)出密鑰
private_key = key.export_key()
with open("private.pem", "wb") as f:
    f.write(private_key)

public_key = key.publickey().export_key()
with open("public.pem", "wb") as f:
    f.write(public_key)

print("私鑰已保存到private.pem")
print("公鑰已保存到public.pem")

from Crypto.PublicKey import RSA
from Crypto.Cipher import PKCS1_OAEP
import base64

# 加載公鑰
with open("public.pem", "rb") as f:
    public_key = RSA.import_key(f.read())

# 明文數(shù)據(jù)
message = "Hello, RSA Encryption!".encode('utf-8')

# 使用公鑰加密
cipher = PKCS1_OAEP.new(public_key)
encrypted_message = cipher.encrypt(message)

# 將加密后的數(shù)據(jù)轉(zhuǎn)換為base64編碼，便于存儲(chǔ)和傳輸
encrypted_message_b64 = base64.b64encode(encrypted_message).decode('utf-8')
print("加密后的數(shù)據(jù)（Base64編碼）:", encrypted_message_b64)

from Crypto.PublicKey import RSA
from Crypto.Cipher import PKCS1_OAEP
import base64

# 加載私鑰
with open("private.pem", "rb") as f:
    private_key = RSA.import_key(f.read())

# 加密數(shù)據(jù)（這里用之前生成的加密數(shù)據(jù)）
encrypted_message_b64 = "你的加密數(shù)據(jù)（Base64編碼）"
encrypted_message = base64.b64decode(encrypted_message_b64)

# 使用私鑰解密
cipher = PKCS1_OAEP.new(private_key)
decrypted_message = cipher.decrypt(encrypted_message)

print("解密后的數(shù)據(jù):", decrypted_message.decode('utf-8'))

from Crypto.PublicKey import RSA
from Crypto.Signature import pkcs1_15
from Crypto.Hash import SHA256

# 加載私鑰
with open("private.pem", "rb") as f:
    private_key = RSA.import_key(f.read())

# 待簽名的數(shù)據(jù)
message = "這是一份需要簽名的文件內(nèi)容".encode('utf-8')

# 使用SHA256哈希函數(shù)對(duì)數(shù)據(jù)進(jìn)行哈希
h = SHA256.new(message)

# 使用私鑰進(jìn)行簽名
signer = pkcs1_15.new(private_key)
signature = signer.sign(h)

# 將簽名轉(zhuǎn)換為base64編碼
signature_b64 = base64.b64encode(signature).decode('utf-8')
print("簽名（Base64編碼）:", signature_b64)

from Crypto.PublicKey import RSA
from Crypto.Signature import pkcs1_15
from Crypto.Hash import SHA256
import base64

# 加載公鑰
with open("public.pem", "rb") as f:
    public_key = RSA.import_key(f.read())

# 待驗(yàn)證的數(shù)據(jù)和簽名
message = "這是一份需要簽名的文件內(nèi)容".encode('utf-8')
signature_b64 = "你的簽名（Base64編碼）"
signature = base64.b64decode(signature_b64)

# 使用SHA256哈希函數(shù)對(duì)數(shù)據(jù)進(jìn)行哈希
h = SHA256.new(message)

# 使用公鑰驗(yàn)證簽名
verifier = pkcs1_15.new(public_key)
if verifier.verify(h, signature):
    print("簽名驗(yàn)證成功，數(shù)據(jù)未被篡改。")
else:
    print("簽名驗(yàn)證失敗，數(shù)據(jù)可能被篡改。")

# 假設(shè)Alice已經(jīng)獲得了Bob的公鑰，并保存在bob_public.pem文件中

# 加密郵件內(nèi)容
encrypted_email_content = rsa_encrypt("重要商業(yè)信息".encode('utf-8'), bob_public_key)

# 簽名郵件內(nèi)容
signature = rsa_sign("重要商業(yè)信息".encode('utf-8'), alice_private_key, 'SHA-256')

# Alice將encrypted_email_content和signature通過電子郵件發(fā)送給Bob