Python EVP.Cipher类代码示例

def encrypt_sn(sn):
    m=Cipher(alg = "aes_128_cbc", key = config['passout'], iv = '\x00' * 16, op = 1)
    m.set_padding(padding=7)
    v = m.update(sn)
    v = v + m.final()
    del m
    return v

 def encrypt_hpwd(self, clearpass):
     key=settings.SECRET_KEY
     iv=get_random_string(16)
     cipher=Cipher(alg='aes_256_cbc', key=key, iv=iv, op=1)
     v=cipher.update(clearpass) + cipher.final()
     del cipher
     return b64encode(v), iv

def decrypt_text(encrypted_text, key):
    # Porting from pyDes-based encryption (see http://git.io/htpk)
    # to use M2Crypto instead (see https://gist.github.com/mrluanma/917014)
    cipher = Cipher(alg="des_ede3_ecb", key=b"{}".format(key), op=0, iv="\0" * 16)
    decrypted_text = cipher.update(base64.b64decode(b"{}".format(encrypted_text)))
    decrypted_text += cipher.final()
    return decrypted_text

def decrypt(chunk, key):
    cipher = Cipher(alg=ALG, key=key, iv=IV, op=0, key_as_bytes=0, padding=PADDING) # 0 is decrypt
    cipher.set_padding(padding=m2.no_padding)
    v = cipher.update(chunk)
    v = v + cipher.final()
    del cipher #需要删除
    return v 

	def decrypt(self, encryptedObject):
		"""Given an encrypted object, decrypt it and return the plaintext value.
		
		If necessary, will retrieve the private key and bulk encryption key
		from the storage context associated with self."""

		# Coerce JSON if necessary
		if type(encryptedObject) == str or type(encryptedObject) == unicode:
			encryptedObject = json.loads(encryptedObject)
		
		# An encrypted object has two relevant fields
		encryptionLabel = encryptedObject['encryption']
		ciphertext = base64.decodestring(encryptedObject['ciphertext'])
		
		# Go get the keying infromation if need it
		if self.privateKey == None:
			self.fetchPrivateKey()
		if not encryptionLabel in self.bulkKeys:
			self.fetchBulkKey(encryptionLabel)

		# In case you were wondering, this is the same as this operation at the openssl command line:
		# openssl enc -d -in data -aes-256-cbc -K `cat unwrapped_symkey.16` -iv `cat iv.16`
		
		# Do the decrypt
		logging.debug("Decrypting data record using bulk key %s" % encryptionLabel)
		cipher = Cipher(alg='aes_256_cbc', key=self.bulkKeys[encryptionLabel], iv=self.bulkKeyIVs[encryptionLabel], op=0) # 0 is DEC
		v = cipher.update(ciphertext)
		v = v + cipher.final()
		del cipher
		logging.debug("Successfully decrypted data record")
		return v

def decryptPasswd(buf, passKey, iv = '\x00' * 16):
    cipher = Cipher(alg='aes_128_cbc', key=passKey, iv=iv, op=0) # 0 is decrypt  
    cipher.set_padding(padding=7)
    v = cipher.update(buf)
    v = v + cipher.final()
    del cipher
    return v

 def sym_decrypt(self, key, data):
     data = b64decode(data)
     cipher = Cipher(alg='aes_128_cbc', key=key, iv=self.IV, op=DEC)
     v = cipher.update(data)
     v = v + cipher.final()
     del cipher
     return v

def do_encrypt(file_name, encrypt_type):  # encrypt_type: 0->decrypt, 1->encrypt
    algorithm = 'bf_cbc'
    key = "\x00\x01\x02\x03\x04\x05\x06\x07\x08\x09\x0A\x0B\x0C\x0D\x0E\x0F"
    iv = "\x01\x02\x03\x04\x05\x06\x07\x08"
    key_as_bytes = 0        # 0->use iv, 1->not use iv
    algo_method = 'md5'     # 'md5', 'sha1'
    salt = '12345678'
    iter_count = 1
    padding = 1

    if not os.path.isfile(file_name):
        return ''

    file = open(file_name, 'r')
    content = file.read()
    file.close()

    try:
        # constructor the EVP.Cipher obj
        cipher_obj = Cipher(algorithm, key, iv, encrypt_type, key_as_bytes, algo_method, salt, iter_count, padding)

        # use memory file obj
        out = StringIO.StringIO()
        out.write(cipher_obj.update(content))
        out.write(cipher_obj.final())
        return out.getvalue()
    except Exception as e:
        return ''

 def __encryptData(self, key, iv, data):
     data = str(data) + "\0"  # <---- ----------
     cipher = Cipher("aes_256_cbc", key, iv, ENC)
     v = cipher.update(data)
     v = v + cipher.final()
     v = base64.b64encode(v)
     return v

def testhash(request):
    key=settings.SECRET_KEY
    iv=Account.objects.get(id=1).random_str
    data=b64decode('MTkcUSMxaxZytN4D3B7XEaPy5wNvAe0MHB1xNZeqZKo=')
    cipher=Cipher(alg='aes_256_cbc', key=key, iv=iv, op=0)
    v=cipher.update(data) + cipher.final()
    del cipher
    return HttpResponse(v)

def encryptData(key, data):
    iv = '\0' * 16
    cipher = Cipher(alg=ALGS[len(key)], key=key, iv=iv, op=1)

    encoded = cipher.update(data)
    encoded = encoded + cipher.final()

    return encoded

def encrypt(chunk, key):
    cipher = Cipher(alg=ALG, key=key, iv=IV, op=1, key_as_bytes=0,padding=PADDING) # 1 is encrypt
    # padding 有时设置为1
    cipher.set_padding(padding=m2.no_padding)
    v = cipher.update(chunk)
    v = v + cipher.final()
    del cipher #需要删除
    
    return v                  

def Decrypt(data):
  '使用aes_128_ecb算法对数据解密'
  # 将密文从16进制转为字节流
  data = util.h2b(data)
  cipher = Cipher(alg = 'aes_128_ecb', key = PRIVATE_KEY, iv = iv, op = DECRYPT_OP)
  buf = cipher.update(data)
  buf = buf + cipher.final()
  del cipher
  return buf 

def Encrypt(data):
  cipher = Cipher(alg = 'aes_128_ecb', key = PRIVATE_KEY, iv = iv, op = ENCRYPT_OP)
  buf = cipher.update(data)
  buf = buf + cipher.final()
  del cipher
  # 将明文从字节流转为16进制
  output = ''
  for i in buf:
    output += '%02X' % (ord(i))
  return output

def Decrypt(data):
  # 将密文从16进制转为字节流
  data = util.h2b(data)
  cipher = Cipher(alg = 'aes_128_ecb', key = PRIVATE_KEY, iv = iv, op = DECRYPT_OP)
  buf = cipher.update(data)
  buf = buf + cipher.final()
  del cipher
  return buf


# print Decrypt('6C0D072989D9F7271EF1BD5AA1C830F2')