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 Android教程網 >> Android技術 >> Android開發 >> 關於android開發 >> AES 加密算法,對用戶的敏感信息加密處理,aes加密算法

AES 加密算法,對用戶的敏感信息加密處理,aes加密算法

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AES 加密算法,對用戶的敏感信息加密處理,aes加密算法


/**
* AES 是一種可逆加密算法,對用戶的敏感信息加密處理 對原始數據進行AES加密後,在進行Base64編碼轉化;
*/
public class AESOperator {

/*
* 加密用的Key 可以用26個字母和數字組成 此處使用AES-128-CBC加密模式,key需要為16位。0021XdSh0021XdSh
*/
private String sKey = "10d2Xd4hf0s1XvSw";
private String ivParameter = "10d2Xd4hf0s1XvSw";
private static AESOperator instance = null;

private AESOperator() {

}

public static AESOperator getInstance() {
if (instance == null)
instance = new AESOperator();
return instance;
}

public static String Encrypt(String encData, String secretKey, String vector) throws Exception {

if (secretKey == null) {
return null;
}
if (secretKey.length() != 16) {
return null;
}
Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
byte[] raw = secretKey.getBytes();
SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");
IvParameterSpec iv = new IvParameterSpec(vector.getBytes());// 使用CBC模式,需要一個向量iv,可增加加密算法的強度

cipher.init(Cipher.ENCRYPT_MODE, skeySpec, iv);
byte[] encrypted = cipher.doFinal(encData.getBytes("utf-8"));
return new BASE64Encoder().encode(encrypted);// �˴�ʹ��BASE64��ת�롣
}


// ����
public String encrypt(String sSrc) throws Exception {
Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
byte[] raw = sKey.getBytes();
SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");
IvParameterSpec iv = new IvParameterSpec(ivParameter.getBytes());// ʹ��CBCģʽ����Ҫһ������iv�������Ӽ����㷨��ǿ��
cipher.init(Cipher.ENCRYPT_MODE, skeySpec, iv);
byte[] encrypted = cipher.doFinal(sSrc.getBytes("utf-8"));
return new BASE64Encoder().encode(encrypted);// �˴�ʹ��BASE64��ת�롣
}

// ����
public String decrypt(String sSrc) throws Exception {
try {
byte[] raw = sKey.getBytes("ASCII");
SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");
Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
IvParameterSpec iv = new IvParameterSpec(ivParameter.getBytes());
cipher.init(Cipher.DECRYPT_MODE, skeySpec, iv);
byte[] encrypted1 = new BASE64Decoder().decodeBuffer(sSrc);// ����base64����
byte[] original = cipher.doFinal(encrypted1);
String originalString = new String(original, "utf-8");
return originalString;
} catch (Exception ex) {
return null;
}
}

public String decrypt(String sSrc, String key, String ivs) throws Exception {
try {
byte[] raw = key.getBytes("ASCII");
SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");
Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
IvParameterSpec iv = new IvParameterSpec(ivs.getBytes());
cipher.init(Cipher.DECRYPT_MODE, skeySpec, iv);
byte[] encrypted1 = new BASE64Decoder().decodeBuffer(sSrc);// ����base64����
byte[] original = cipher.doFinal(encrypted1);
String originalString = new String(original, "utf-8");
return originalString;
} catch (Exception ex) {
return null;
}
}

public static String encodeBytes(byte[] bytes) {
StringBuffer strBuf = new StringBuffer();

for (int i = 0; i < bytes.length; i++) {
strBuf.append((char) (((bytes[i] >> 4) & 0xF) + ((int) 'a')));
strBuf.append((char) (((bytes[i]) & 0xF) + ((int) 'a')));
}

return strBuf.toString();
}


}

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