Java相当于C ++加密 [英] Java equivalent of C++ encryption

问题描述

我有以下用于加密的c ++代码片段：

I have this following snippet from c++ code that is used for encryption:

EVP_CIPHER_CTX ctx;
const EVP_CIPHER * cipher = EVP_des_ede3_cbc();
unsigned char iv[EVP_MAX_IV_LENGTH];
unsigned char key[EVP_MAX_KEY_LENGTH];
String seed;

_config->get_value("crypto_seed", &seed); // uses the seed value from pimp config.

if (seed.is_empty())
{
    return false;
}

EVP_BytesToKey(cipher, EVP_sha1(),
        (unsigned char *) 0, // no salt
        reinterpret_cast<unsigned char *>(const_cast<char *>(seed.chars())), seed.length(),
        1, // hash passphrase just once.
        key, iv);

EVP_CIPHER_CTX_init(&ctx);
EVP_CipherInit_ex(&ctx, cipher, (ENGINE *) 0, key,
        iv,
        1); // encrypt

在java中相当于c ++加密是什么？

what s the equivalent of the c++ encryption in java?

我看到有 des 算法，那么我看到 sha1 。

I see there is des algorithm, then i see sha1.

这与openssl加密有关。新200新新新旗新新新200新200新新200新新新200新新200新新200新新200新新200新新200新新新新新新新新旗新旗新本质上我希望与c ++代码生成相同的输出。

This is related to openssl encryption. But not sure what is the equivalent. essentially i would like the same output as c++ code generates.

我询问相当于 EVP_CIPHER_CTX 或这里使用的加密名称是什么，所以我可以从那里拿走。

i m asking the what s the equivalent of EVP_CIPHER_CTX or what s the name of the encrytion being used here so i can take it from there.

编辑：不要求任何人将代码转换为java，只是询问相应的包或类将执行相同的操作。

推荐答案

您正在转换的代码使用openssl库。它使用初始向量执行三重DES加密。您需要了解的第一件事就是它正在做什么（最好是为什么）。

The code you are converting from uses the openssl library. It carries out a triple-DES encryption using an Initial Vector. The first thing you need to understand is exactly what it's doing (and preferably why).

不幸的是，openssl文档并不是非常彻底（参见这里）...虽然O'Reilley的书籍网络安全与OpenSSL 是相当好一点（这有点过时了）。

Unfortunately the openssl documentation isn't terribly thorough (see here) ... though the O'Reilley book Network Security with OpenSSL is quite a bit better (it's a bit out of date, though).

一旦你知道需要做什么，你不应该在Java中编写很多困难使用标准的javax.crypto包。

Once you know what needs to be done, you shouldn't have much difficulty coding it in Java using the standard javax.crypto package.

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