java - 如何在java中使用md5计算哈希值

Question

我在将 md5 哈希码转换为字节码时遇到问题。使用 C#，服务端从哈希码生成一些字节码，但我无法获得相同的字节码。请帮助我如何获得相同的字节码。

C#:

 MD5CryptoServiceProvider md5Hasher = new MD5CryptoServiceProvider();
 byte[] hashedBytes = null;
 UTF8Encoding encoder = new UTF8Encoding();
 hashedBytes = md5Hasher.ComputeHash(encoder.GetBytes(Loginentities.Password));

encoder.GetBytes(Loginentities.Password)

对于这一行，我得到的字节例如[19, 15, 101, 15, 4, 104, 105, 14, 7, 1]

hashedBytes 正在获取这些字节[149,229,240 ,182 ,152 ,142 ,199, 3 ,232 ,50, 23, 47, 112, 206 ,125, 199]

哈希码:95e5f0b69asdda3e832172f70ce7dc7

Java:

String str1 ="ramprasad";
byte[] bytes1 = str1.getBytes();
System.out.println("uno shriram is "+Arrays.toString(bytes1));

对于 bytes1，我得到 [117, 110, 111, 115, 104, 114, 105, 114, 97, 109]

     try {
                    MessageDigest md = MessageDigest.getInstance("MD5");
                    byte[] array = md.digest(bytes);
                    StringBuffer sb = new StringBuffer();
                    for (int i = 0; i < array.length; ++i) {
                      sb.append(Integer.toHexString((array[i] & 0xFF) | 0x100).substring(1,3));
                   }
                    System.out.println( "0X"+sb.toString());
OUTPUT:0X95e5f0b21398asdas03e832172f70ce7dc7
                   String x= "0x"+sb.toString();
                    System.out.println(x.getBytes() );
OUTPUT:[B@1174b07
                    System.out.println("uno shriram is "+Arrays.toString(x.getBytes()));
OUTPUT:uno shriram is [48, 120, 57, 53, 101, 53, 102, 48, 98, 54, 57, 56, 56, 101, 99, 55, 48, 51, 101, 56, 51, 50, 49, 55, 50, 102, 55, 48, 99, 101, 55, 100, 99, 55]
                    try
                    {
                    byte[] bytesasd = x.getBytes("UTF-8");
                    MessageDigest m = MessageDigest.getInstance("MD5");

                    byte[] hashedbyte = m.digest(bytesasd);

                    System.out.println(hashedbyte);
                    }
                    catch(Exception e)
                    {
                        e.printStackTrace();
                    }

                } catch (java.security.NoSuchAlgorithmException e) {
                }
            try 
            {
                String doc2 = new String(bytes, "UTF-8");
                System.out.println(""+doc2);
            } catch (UnsupportedEncodingException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }

如何在 java 中获取精确的散列字节。请帮助我如何获得它

Answer 1

不要忘记调用getBytes("UTF-8")，否则您的编码可能会关闭。类似的东西

String str1 = "unoshriram";
String outHash = "95e5f0b6988ec703e832172f70ce7dc7";
try {
    MessageDigest md = MessageDigest.getInstance("MD5");
    byte[] array = md.digest(str1.getBytes("UTF-8"));
    StringBuilder sb = new StringBuilder();
    for (byte b : array) {
        sb.append(String.format("%02X", b));
    }
    System.out.println(sb.toString());
    System.out.println(sb.toString().equalsIgnoreCase(outHash));
} catch (Exception e) {
    e.printStackTrace();
}

输出为

95E5F0B6988EC703E832172F70CE7DC7
true