利用AES加密算法对报文进行加密解密，实现C#与Java互通，网上查了一堆也许是因为版本的原因都用不了，于是还是静心下来自己写个：
直接上代码：
C# 需要引用System.Security.Cryptography命名空间
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
|
/// <summary>AES加密</summary>/// <param name="text">明文</param>/// <param name="key">密钥,长度为16的字符串</param>/// <param name="iv">偏移量,长度为16的字符串</param>/// <returns>密文</returns>public static string EncodeAES(string text, string key,string iv){ RijndaelManaged rijndaelCipher = new RijndaelManaged(); rijndaelCipher.Mode = CipherMode.CBC; rijndaelCipher.Padding = PaddingMode.Zeros; rijndaelCipher.KeySize = 128; rijndaelCipher.BlockSize = 128; byte[] pwdBytes = System.Text.Encoding.UTF8.GetBytes(key); byte[] keyBytes = new byte[16]; int len = pwdBytes.Length; if (len > keyBytes.Length) len = keyBytes.Length; System.Array.Copy(pwdBytes, keyBytes, len); rijndaelCipher.Key = keyBytes; rijndaelCipher.IV = Encoding.UTF8.GetBytes(iv); ICryptoTransform transform = rijndaelCipher.CreateEncryptor(); byte[] plainText = Encoding.UTF8.GetBytes(text); byte[] cipherBytes = transform.TransformFinalBlock(plainText, 0, plainText.Length); return Convert.ToBase64String(cipherBytes);}/// <summary>AES解密</summary>/// <param name="text">密文</param>/// <param name="key">密钥,长度为16的字符串</param>/// <param name="iv">偏移量,长度为16的字符串</param>/// <returns>明文</returns>public static string DecodeAES(string text, string key,string iv){ RijndaelManaged rijndaelCipher = new RijndaelManaged(); rijndaelCipher.Mode = CipherMode.CBC; rijndaelCipher.Padding = PaddingMode.Zeros; rijndaelCipher.KeySize = 128; rijndaelCipher.BlockSize = 128; byte[] encryptedData = Convert.FromBase64String(text); byte[] pwdBytes = System.Text.Encoding.UTF8.GetBytes(key); byte[] keyBytes = new byte[16]; int len = pwdBytes.Length; if (len > keyBytes.Length) len = keyBytes.Length; System.Array.Copy(pwdBytes, keyBytes, len); rijndaelCipher.Key = keyBytes; rijndaelCipher.IV = Encoding.UTF8.GetBytes(iv); ICryptoTransform transform = rijndaelCipher.CreateDecryptor(); byte[] plainText = transform.TransformFinalBlock(encryptedData, 0, encryptedData.Length); return Encoding.UTF8.GetString(plainText);} |
Java，需要以下引用：
import javax.crypto.Cipher;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;
另外需要对String和byte[]相互转换的类，我自己写的Base64Helper
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
|
/** * @author miracle.qu * @see AES算法加密明文 * @param data 明文 * @param key 密钥，长度16 * @param iv 偏移量，长度16 * @return 密文 */ public static String encryptAES(String data,String key,String iv) throws Exception { try { Cipher cipher = Cipher.getInstance("AES/CBC/NoPadding"); int blockSize = cipher.getBlockSize(); byte[] dataBytes = data.getBytes(); int plaintextLength = dataBytes.length; if (plaintextLength % blockSize != 0) { plaintextLength = plaintextLength + (blockSize - (plaintextLength % blockSize)); } byte[] plaintext = new byte[plaintextLength]; System.arraycopy(dataBytes, 0, plaintext, 0, dataBytes.length); SecretKeySpec keyspec = new SecretKeySpec(key.getBytes(), "AES"); IvParameterSpec ivspec = new IvParameterSpec(iv.getBytes()); cipher.init(Cipher.ENCRYPT_MODE, keyspec, ivspec); byte[] encrypted = cipher.doFinal(plaintext); return Base64Helper.encode(encrypted).trim(); } catch (Exception e) { e.printStackTrace(); return null; } } /** * @author miracle.qu * @see AES算法解密密文 * @param data 密文 * @param key 密钥，长度16 * @param iv 偏移量，长度16 * @return 明文 */ public static String decryptAES(String data,String key,String iv) throws Exception { try { byte[] encrypted1 = Base64Helper.decode(data); Cipher cipher = Cipher.getInstance("AES/CBC/NoPadding"); SecretKeySpec keyspec = new SecretKeySpec(key.getBytes(), "AES"); IvParameterSpec ivspec = new IvParameterSpec(iv.getBytes()); cipher.init(Cipher.DECRYPT_MODE, keyspec, ivspec); byte[] original = cipher.doFinal(encrypted1); String originalString = new String(original); return originalString.trim(); } catch (Exception e) { e.printStackTrace(); return null; } } |
其中Base64Helper类是个简单的类，引用：
import org.apache.commons.codec.binary.Base64;
其中核心代码：
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
|
/** * 编码 * @param byteArray * @return */public static String encode(byte[] byteArray) { return new String(new Base64().encode(byteArray));}/** * 解码 * @param base64EncodedString * @return */public static byte[] decode(String base64EncodedString) { return new Base64().decode(base64EncodedString);} |
原文地址: https://blog.csdn.net/mr_qu/article/details/8433370