写在前面的话:
1.建议加密后将密文转为16进制的字符串(便于观看)。
2.以下的两种加密的方法密钥不限定长度。
[java]
1. /**
2. *AES加密解密工具类
3. *@author M-Y
4. */
5. public class
6. private static final Logger logger = Logger.getLogger(AESUtil.class);
7. private static final String defaultCharset = "UTF-8";
8. private static final String KEY_AES = "AES";
9. private static final String KEY = "123456";
10. /**
11. * 加密
12. *
13. * @param data 需要加密的内容
14. * @param key 加密密码
15. * @return
16. */
17. public static
18. return
19. }
20.
21. /**
22. * 解密
23. *
24. * @param data 待解密内容
25. * @param key 解密密钥
26. * @return
27. */
28. public static
29. return
30. }
31.
32. /**
33. * 加解密
34. *
35. * @param data 待处理数据
36. * @param password 密钥
37. * @param mode 加解密mode
38. * @return
39. */
40. private static String doAES(String data, String key, int
41. try
42. if
43. return null;
44. }
45. //判断是加密还是解密
46. boolean
47. byte[] content;
48. //true 加密内容 false 解密内容
49. if
50. content = data.getBytes(defaultCharset);
51. else
52. content = parseHexStr2Byte(data);
53. }
54. //1.构造密钥生成器,指定为AES算法,不区分大小写
55. KeyGenerator kgen = KeyGenerator.getInstance(KEY_AES);
56. //2.根据ecnodeRules规则初始化密钥生成器
57. //生成一个128位的随机源,根据传入的字节数组
58. 128, new
59. //3.产生原始对称密钥
60. SecretKey secretKey = kgen.generateKey();
61. //4.获得原始对称密钥的字节数组
62. byte[] enCodeFormat = secretKey.getEncoded();
63. //5.根据字节数组生成AES密钥
64. new
65. //6.根据指定算法AES自成密码器
66. // 创建密码器
67. //7.初始化密码器,第一个参数为加密(Encrypt_mode)或者解密解密(Decrypt_mode)操作,第二个参数为使用的KEY
68. // 初始化
69. byte[] result = cipher.doFinal(content);
70. if
71. //将二进制转换成16进制
72. return
73. else
74. return new
75. }
76. catch
77. "AES 密文处理异常", e);
78. }
79. return null;
80. }
81. /**
82. * 将二进制转换成16进制
83. *
84. * @param buf
85. * @return
86. */
87. public static String parseByte2HexStr(byte
88. new
89. for (int i = 0; i < buf.length; i++) {
90. 0xFF);
91. if (hex.length() == 1) {
92. '0'
93. }
94. sb.append(hex.toUpperCase());
95. }
96. return
97. }
98. /**
99. * 将16进制转换为二进制
100. *
101. * @param hexStr
102. * @return
103. */
104. public static byte[] parseHexStr2Byte(String hexStr) {
105. if (hexStr.length() < 1) {
106. return null;
107. }
108. byte[] result = new byte[hexStr.length() / 2];
109. for (int i = 0; i < hexStr.length() / 2; i++) {
110. int high = Integer.parseInt(hexStr.substring(i * 2, i * 2 + 1), 16);
111. int low = Integer.parseInt(hexStr.substring(i * 2 + 1, i * 2 + 2), 16);
112. byte) (high * 16
113. }
114. return
115. }
116. public static void main(String[] args) throws
117. "{'repairPhone':'18547854787','customPhone':'12365478965','captchav':'58m7'}";
118. "加密前:"
119. "加密密钥和解密密钥:"
120. String encrypt = encrypt(content, KEY);
121. "加密后:"
122. String decrypt = decrypt(encrypt, KEY);
123. "解密后:"
124. }
125. }
/**
*AES加密解密工具类
*@author M-Y
*/
public class AESUtil {
private static final Logger logger = Logger.getLogger(AESUtil.class);
private static final String defaultCharset = "UTF-8";
private static final String KEY_AES = "AES";
private static final String KEY = "123456";
/**
* 加密
*
* @param data 需要加密的内容
* @param key 加密密码
* @return
*/
public static String encrypt(String data, String key) {
return doAES(data, key, Cipher.ENCRYPT_MODE);
}
/**
* 解密
*
* @param data 待解密内容
* @param key 解密密钥
* @return
*/
public static String decrypt(String data, String key) {
return doAES(data, key, Cipher.DECRYPT_MODE);
}
/**
* 加解密
*
* @param data 待处理数据
* @param password 密钥
* @param mode 加解密mode
* @return
*/
private static String doAES(String data, String key, int mode) {
try {
if (StringUtils.isBlank(data) || StringUtils.isBlank(key)) {
return null;
}
//判断是加密还是解密
boolean encrypt = mode == Cipher.ENCRYPT_MODE;
byte[] content;
//true 加密内容 false 解密内容
if (encrypt) {
content = data.getBytes(defaultCharset);
} else {
content = parseHexStr2Byte(data);
}
//1.构造密钥生成器,指定为AES算法,不区分大小写
KeyGenerator kgen = KeyGenerator.getInstance(KEY_AES);
//2.根据ecnodeRules规则初始化密钥生成器
//生成一个128位的随机源,根据传入的字节数组
kgen.init(128, new SecureRandom(key.getBytes()));
//3.产生原始对称密钥
SecretKey secretKey = kgen.generateKey();
//4.获得原始对称密钥的字节数组
byte[] enCodeFormat = secretKey.getEncoded();
//5.根据字节数组生成AES密钥
SecretKeySpec keySpec = new SecretKeySpec(enCodeFormat, KEY_AES);
//6.根据指定算法AES自成密码器
Cipher cipher = Cipher.getInstance(KEY_AES);// 创建密码器
//7.初始化密码器,第一个参数为加密(Encrypt_mode)或者解密解密(Decrypt_mode)操作,第二个参数为使用的KEY
cipher.init(mode, keySpec);// 初始化
byte[] result = cipher.doFinal(content);
if (encrypt) {
//将二进制转换成16进制
return parseByte2HexStr(result);
} else {
return new String(result, defaultCharset);
}
} catch (Exception e) {
logger.error("AES 密文处理异常", e);
}
return null;
}
/**
* 将二进制转换成16进制
*
* @param buf
* @return
*/
public static String parseByte2HexStr(byte buf[]) {
StringBuilder sb = new StringBuilder();
for (int i = 0; i < buf.length; i++) {
String hex = Integer.toHexString(buf[i] & 0xFF);
if (hex.length() == 1) {
hex = '0' + hex;
}
sb.append(hex.toUpperCase());
}
return sb.toString();
}
/**
* 将16进制转换为二进制
*
* @param hexStr
* @return
*/
public static byte[] parseHexStr2Byte(String hexStr) {
if (hexStr.length() < 1) {
return null;
}
byte[] result = new byte[hexStr.length() / 2];
for (int i = 0; i < hexStr.length() / 2; i++) {
int high = Integer.parseInt(hexStr.substring(i * 2, i * 2 + 1), 16);
int low = Integer.parseInt(hexStr.substring(i * 2 + 1, i * 2 + 2), 16);
result[i] = (byte) (high * 16 + low);
}
return result;
}
public static void main(String[] args) throws Exception {
String content = "{'repairPhone':'18547854787','customPhone':'12365478965','captchav':'58m7'}";
System.out.println("加密前:" + content);
System.out.println("加密密钥和解密密钥:" + KEY);
String encrypt = encrypt(content, KEY);
System.out.println("加密后:" + encrypt);
String decrypt = decrypt(encrypt, KEY);
System.out.println("解密后:" + decrypt);
}
}
输出结果:
[java]
1. 加密前:{'repairPhone':'18547854787','customPhone':'12365478965','captchav':'58m7'}
2. 加密密钥和解密密钥:123456
3. 加密后:2A3D75862E69BF61DFAD94017E930227A715C8E533AA1A12361D6BE6E190EC5EE77AA66CAC8005A643BFB26134EE60398C30104B1F7FB3CC6B78795368A86D8215B88A5C80D9C2E4936EEEB0DECA7A88
4. 解密后:{'repairPhone':'18547854787','customPhone':'12365478965','captchav':'58m7'}
加密前:{'repairPhone':'18547854787','customPhone':'12365478965','captchav':'58m7'}
加密密钥和解密密钥:123456
加密后:2A3D75862E69BF61DFAD94017E930227A715C8E533AA1A12361D6BE6E190EC5EE77AA66CAC8005A643BFB26134EE60398C30104B1F7FB3CC6B78795368A86D8215B88A5C80D9C2E4936EEEB0DECA7A88
解密后:{'repairPhone':'18547854787','customPhone':'12365478965','captchav':'58m7'}
方法二:替换AESUtil 类中的doAES方法并加上以下成员
[java]
1. private static final String KEY_MD5 = "MD5";
2. private static
3.
4. static
5. try
6. md5Digest = MessageDigest.getInstance(KEY_MD5);
7. catch
8. //
9. }
10. }
private static final String KEY_MD5 = "MD5";
private static MessageDigest md5Digest;
static {
try {
md5Digest = MessageDigest.getInstance(KEY_MD5);
} catch (NoSuchAlgorithmException e) {
//
}
}
doAES方法:
[java]
1. /**
2. * 加解密
3. *
4. * @param data
5. * @param key
6. * @param mode
7. * @return
8. */
9. private static String doAES(String data, String key, int
10. try
11. if
12. return null;
13. }
14. boolean
15. byte[] content;
16. //true 加密内容 false 解密内容
17. if
18. content = data.getBytes(defaultCharset);
19. else
20. content = parseHexStr2Byte(data);
21. }
22. new SecretKeySpec(md5Digest.digest(key.getBytes(defaultCharset)), KEY_AES);//构造一个密钥
23. // 创建密码器
24. // 初始化
25. byte[] result = cipher.doFinal(content);//加密或解密
26. if
27. return
28. else
29. return new
30. }
31. catch
32. "AES 密文处理异常", e);
33. }
34. return null;
35. }