用 Java (AES) 加密，用 C++ 解密(OpenSSL)

发布于 2024-11-02 18:24:38 字数 1502 浏览 0 评论 0原文

所有，

我正在尝试使用 AES 256 对 Java 中的字符串进行加密，并使用 openssl 在 C++ 中对其进行解密。在java中，我：

在JCEKS中生成了SecretKey
字符串
加密了从SecretKey以base64编码的字符串和getEncoded（）的

现在我尝试使用OpenSSL在C ++中解密它：

string encoded = string("LtANvfmnb5zj+4+g6I7hC53eHMIRa4BOkzMpXYLlA9DRnRWjQjO9uMot6hR7zzTIOtdmkRJ16aVZRfIT3sYn17jYEJjvAN9/N7FbblLplCtOuHatGffH0pSf8lu76SUzDIZU+EXgTnK1SsEa4sndcXvg5jaElxr4GCHq+F2aL7t+LVjbqWg4kpYkYbKdrKQgOsMCbBBG2aMFTmQ/cxnVyH8juC/ZTSrPMyjZ7KxS0P9PzfmxkeSi3VsBIjXL6Q4pneZeemP+1JdG02yQWhruJUuH5aRE0piQ776lxt6g0wU=");
string encodedKey = string("1rE2AM4Xf0ItxN/s1oDvaNmXhXlVF3hE+vSkyMPzDl4=");

string decodedEnc = base64_decode(encoded);
string decodedKey = base64_decode(encodedKey);

const unsigned char *keyBytes = reinterpret_cast<const unsigned char*>(decodedKey.c_str());
const unsigned char *in = reinterpret_cast<const unsigned char*>(decodedEnc.c_str());



cout << "initializing" << endl;
AES_KEY key;
/* set the encryption key */
AES_set_encrypt_key(keyBytes, 256, &key);

unsigned char *out = (unsigned char*) malloc(1024);

cout << "Decrypting" << endl;

AES_ecb_encrypt(in,out,&key,AES_DECRYPT);

cout << "decrypted " << out << endl;
char* dec = reinterpret_cast< char*>(out);

string decrypted = std::string(dec);

cout << "Decrypted String : '" << decrypted << "'" << endl;

我得到的只是打印到终端的垃圾。我觉得我很接近，所以任何帮助将不胜感激。

谢谢马克

原文

All,

I'm trying to encrypt a string in Java using AES 256 and decrypt it in C++ using openssl. In java I:

Generated a SecretKey in a JCEKS
Encrypted the string
encoded both the string and getEncoded() from the SecretKey in base64

Now I'm trying to decrypt it in C++ using OpenSSL:

string encoded = string("LtANvfmnb5zj+4+g6I7hC53eHMIRa4BOkzMpXYLlA9DRnRWjQjO9uMot6hR7zzTIOtdmkRJ16aVZRfIT3sYn17jYEJjvAN9/N7FbblLplCtOuHatGffH0pSf8lu76SUzDIZU+EXgTnK1SsEa4sndcXvg5jaElxr4GCHq+F2aL7t+LVjbqWg4kpYkYbKdrKQgOsMCbBBG2aMFTmQ/cxnVyH8juC/ZTSrPMyjZ7KxS0P9PzfmxkeSi3VsBIjXL6Q4pneZeemP+1JdG02yQWhruJUuH5aRE0piQ776lxt6g0wU=");
string encodedKey = string("1rE2AM4Xf0ItxN/s1oDvaNmXhXlVF3hE+vSkyMPzDl4=");

string decodedEnc = base64_decode(encoded);
string decodedKey = base64_decode(encodedKey);

const unsigned char *keyBytes = reinterpret_cast<const unsigned char*>(decodedKey.c_str());
const unsigned char *in = reinterpret_cast<const unsigned char*>(decodedEnc.c_str());



cout << "initializing" << endl;
AES_KEY key;
/* set the encryption key */
AES_set_encrypt_key(keyBytes, 256, &key);

unsigned char *out = (unsigned char*) malloc(1024);

cout << "Decrypting" << endl;

AES_ecb_encrypt(in,out,&key,AES_DECRYPT);

cout << "decrypted " << out << endl;
char* dec = reinterpret_cast< char*>(out);

string decrypted = std::string(dec);

cout << "Decrypted String : '" << decrypted << "'" << endl;

All I am getting is garbage printed to the terminal. I feel like I'm close, so any help would be greatly appreciated.

Thanks
Marc

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请别遗忘我 2024-11-09 18:24:38

根据我的理解，尝试解密密钥，然后尝试 AES_decrypt ，应按如下方式调用：

cout << "Decrypting" << endl;

从这一行开始...使用代码如下：

AES_KEY k
AES_set_decrypt_key(keyBytes, 256, &k);

unsigned char* outdecrypt = new unsigned char[1024];
AES_decrypt(out, outdecrypt, &k);

according to my understanding, try the decryption key and then AES_decrypt which should be called as follows:

cout << "Decrypting" << endl;

from this line onwards... use the code as follows:

AES_KEY k
AES_set_decrypt_key(keyBytes, 256, &k);

unsigned char* outdecrypt = new unsigned char[1024];
AES_decrypt(out, outdecrypt, &k);

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我很OK 2024-11-09 18:24:38

除了检查密钥长度之外，还要确保 Java 和 C/OpenSSL 使用相同的初始化向量 (IV)。有些框架会为您初始化它，有些则不会。这是初始块将与其进行异或的数据向量（IIRC，至少在一种编码模式下），其中 AES 将每个块与前一个块进行异或。如果没有这个（IIRC，它是 CBC/循环块编码），则可以检查最后一个块，因为它通常具有易于以强力方式验证的填充。

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