[英]How to encrypt string in Java and decrypt in Python?
我已经使用 AES 在 Java 中加密了一个字符串,并在 Python 中进行了解密。 但是,在用 Python 解密后这里有随机字符,而不是预期的输出。
import javax.crypto.Cipher;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;
import android.util.Base64;
public class AESCrypt{
public static final byte[] encBytes(byte[] srcBytes, byte[] key,
byte[] newIv) throws Exception {
Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
SecretKeySpec skeySpec = new SecretKeySpec(key, "AES");
IvParameterSpec iv = new IvParameterSpec(newIv);
cipher.init(Cipher.ENCRYPT_MODE, skeySpec, iv);
byte[] encrypted = cipher.doFinal(srcBytes);
return encrypted;
}
public static final String encText(String sSrc)
throws Exception {
byte[] key =
{'a','r','e','y','o','u','o','k','a','r','e','y','o','u','o','k'};
byte[] ivk = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
byte[] srcBytes = sSrc.getBytes("utf-8");
byte[] encrypted = encBytes(srcBytes, key, ivk);
return Base64.encodeToString(encrypted,Base64.DEFAULT);
}
}
和蟒蛇代码是:
#!/usr/bin/env python
from Crypto.Cipher import AES
import base64
key = 'areyouokareyouok'
iv = '0000000000000000'
BS = 16
pad = lambda s: s + (BS - len(s) % BS) * chr(BS - len(s) % BS)
unpad = lambda s : s[0:-ord(s[-1])]
def decrypt_aes(cryptedStr):
generator = AES.new(key, AES.MODE_CBC, iv)
cryptedStr = base64.b64decode(cryptedStr)
recovery = generator.decrypt(cryptedStr)
return unpad(recovery)
sourceStr = 'Dur/0RHadPwToNWczq8xk3mBdjybyw/yaMgas1F+WLg='
print decrypt_aes(sourceStr)
我不明白为什么? 填充?
我正在使用Python >= 3.5
。 您的 java 加密数据可以通过以下方式使用pycryptodome
解密:
#!/usr/bin/env python
import base64
from Crypto.Cipher import AES
from Crypto.Util.Padding import unpad
key = 'areyouokareyouok'
_iv = "\x00"*AES.block_size # creates a 16 byte zero initialized string
def decrypt_aes(cryptedStr):
generator = AES.new(key.encode(), AES.MODE_CBC, _iv.encode())
cryptedStr_bytes = base64.b64decode(cryptedStr)
recovery = generator.decrypt(cryptedStr_bytes)
return unpad(recovery, AES.block_size)
sourceStr = 'Dur/0RHadPwToNWczq8xk3mBdjybyw/yaMgas1F+WLg='
print(f"Output - {decrypt_aes(sourceStr)}")
#Output - b'$PQWP6,014541.20,00000008*11\r\n'
我故意没有将最终解密的字节解码为字符串,以显示原始字符串末尾有一个回车符和一个换行符。
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