Question

有人可以使用Python使用m2crypto aes256 CBC为我提供加密/解密的代码

Answer 1

M2Crypto的文档非常糟糕。有时，OpenSSL文档（m2crypto包装OpenSSL）可以提供帮助。您最好的选择是查看M2Crypto单元测试 - http://svn.osafoundation.org/m2crypto/trunk/tests/test_evp.py - 查找test_AES()方法。

Answer 2

看看m2secret：

小实用程序和模块使用加密和解密数据对称密钥算法。默认情况下使用CBC的256位AES（Rijndael），但有些选项是可配置的。 PBKDF2算法用于导出密钥来自密码。

Answer 3

def encrypt_file(key, in_filename, out_filename,iv):
    cipher=M2Crypto.EVP.Cipher('aes_256_cfb',key,iv, op=1)
    with open(in_filename, 'rb') as infile:
        with open(out_filename, 'wb') as outfile:
          outfile.write(b)
          while True:
            buf = infile.read(1024)
            if not buf:
                break
            outfile.write(cipher.update(buf))

          outfile.write( cipher.final() )  
          outfile.close()
        infile.close()

def decrypt_file(key, in_filename, out_filename,iv):
    cipher = M2Crypto.EVP.Cipher("aes_256_cfb",key , iv, op = 0)
    with open(in_filename, 'rb') as infile: 
        with open(out_filename, 'wb') as outfile:
          while True:
            buf = infile.read(1024)
            if not buf:
                break
            try:
                outfile.write(cipher.update(buf))
            except:
                print "here"
          outfile.write( cipher.final() )  
          outfile.close()
        infile.close()

Answer 4

我在M2Crypto周围使用了以下包装器（借鉴cryptography.io）：

import os
import base64
import M2Crypto


class SymmetricEncryption(object):

    @staticmethod
    def generate_key():
        return base64.b64encode(os.urandom(48))

    def __init__(self, key):
        key = base64.b64decode(key)
        self.iv = key[:16]
        self.key = key[16:]

    def encrypt(self, plaintext):
        ENCRYPT = 1
        cipher = M2Crypto.EVP.Cipher(alg='aes_256_cbc', key=self.key, iv=self.iv, op=ENCRYPT)
        ciphertext = cipher.update(plaintext) + cipher.final()
        return base64.b64encode(ciphertext)

    def decrypt(self, cyphertext):
        DECRYPT = 0
        cipher = M2Crypto.EVP.Cipher(alg='aes_256_cbc', key=self.key, iv=self.iv, op=DECRYPT)
        plaintext = cipher.update(base64.b64decode(cyphertext)) + cipher.final()
        return plaintext

Answer 5

说到安全性，没有什么能比阅读文档更好了。

http://chandlerproject.org/bin/view/Projects/MeTooCrypto

即使我花时间去理解并制作完美的代码供你复制和粘贴，你也不知道我是否做得不错。我知道不是很有帮助，但我祝你好运并保证数据安全。

M2Crypto使用AES256加密/解密

5 个答案: