相当于C 中的RFC2898DeriveBytes，而无需使用CLR

Question

c 中rfc2898derivebytes的替代方案而无需使用clr。C＃样本在下面共享。

string clearText="text to sign";
string EncryptionKey = "secret";
byte[] clearBytes = Encoding.UTF8.GetBytes(clearText);
using (Aes encryptor = Aes.Create())
{
    Rfc2898DeriveBytes pdb = new Rfc2898DeriveBytes(EncryptionKey, new byte[] { 0x48, 0x71, 0x21, 0x6d, 0x21, 0x4c, 0x61, 0x62, 0x72, 0x62, 0x61, 0x62, 0x72 });
    encryptor.Key = pdb.GetBytes(32);
    encryptor.IV = pdb.GetBytes(16);
    using (MemoryStream ms = new MemoryStream())
    {
        using (CryptoStream cs = new CryptoStream(ms, encryptor.CreateEncryptor(), CryptoStreamMode.Write))
        {
            cs.Write(clearBytes, 0, clearBytes.Length);
            cs.Close();
        }
        clearText = Convert.ToBase64String(ms.ToArray());
    }
}

Answer 1

您可以在openssl中使用 PKCS5_PBKDF2_HMAC。

这两个功能都是PBKDF2函数，可以使用互换性。

更新：

这是用于您在C#和OpenSSL中生成类似键的示例代码。

C#侧：

public static void Main()
{
    string EncryptionKey = "secret";
    Rfc2898DeriveBytes pdb = new Rfc2898DeriveBytes(EncryptionKey, new byte[] { 0x48, 0x71, 0x21, 0x6d, 0x21, 0x4c, 0x61, 0x62, 0x72, 0x62, 0x61, 0x62, 0x72 }, 1000);
    Console.WriteLine("[{0}]", string.Join(", ", pdb.GetBytes(32)));
    Console.WriteLine("[{0}]", string.Join(", ", pdb.GetBytes(16)));
}

OpenSSL侧：

#include <openssl/evp.h>
#include <string.h>
#include <stdlib.h>
int main(){
        char secret[] = "secret";
        unsigned char buf[48] = {0,};
        int size = 48;
        unsigned char salt[] = { 0x48, 0x71, 0x21, 0x6d, 0x21, 0x4c, 0x61, 0x62, 0x72, 0x62, 0x61, 0x62, 0x72 };
        PKCS5_PBKDF2_HMAC(secret, strlen(secret), salt, sizeof(salt), 1000, EVP_sha1(), size, buf);
        for (int i = 0; i < size; i++)
                printf("%d ", buf[i]);
        return 0;
}

在这些代码中只记得只有1,000，使用至少100,000甚至1,000,000。