Android AES加解密

什么是AES加密

英文全称为Advanced Encryption Standard，中文为高级加密标准。又被称为Rijndael，中文为分组密码。

整理好的两个类，直接使用就行。

注意：passWord与VIPARA一定是16个字符
如何使用

public class Test {

    public static void main(String[] args) {

        final String passWord = "1111111122222222";
        String str = "今天还不错啊abc123";
        LogJava.e("原始字符串：" + str);
        try {
            String str1 = AesUtils.aesEncrypt(str, passWord);
            LogJava.e("AES加密后字符串：" + str1);
            String str2 = AesUtils.aesDecrypt(str1, passWord);
            LogJava.e("AES解密后字符串：" + str2);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

AesUtils

package com.pro.testignore.T20190224.aes;

/**
 * @author by Talon, Date on 19/5/16.
 * note:
 */

import java.io.UnsupportedEncodingException;
import java.security.InvalidAlgorithmParameterException;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;

import javax.crypto.BadPaddingException;
import javax.crypto.Cipher;
import javax.crypto.IllegalBlockSizeException;
import javax.crypto.NoSuchPaddingException;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;

public class AesUtils {
    public static final String VIPARA = "1269571569321021";// "1269571569321021";
    public static final String bm = "UTF-8";


    /**
     * 字节数组转化为大写16进制字符串
     *
     * @param b
     * @return
     */
    private static String byte2HexStr(byte[] b) {
        StringBuilder sb = new StringBuilder();
        for (int i = 0; i < b.length; i++) {
            String s = Integer.toHexString(b[i] & 0xFF);
            if (s.length() == 1) {
                sb.append("0");
            }

            sb.append(s.toUpperCase());
        }

        return sb.toString();
    }

    /**
     * 16进制字符串转字节数组
     *
     * @param s
     * @return
     */
    private static byte[] str2ByteArray(String s) {
        int byteArrayLength = s.length() / 2;
        byte[] b = new byte[byteArrayLength];
        for (int i = 0; i < byteArrayLength; i++) {
            byte b0 = (byte) Integer.valueOf(s.substring(i * 2, i * 2 + 2), 16)
                    .intValue();
            b[i] = b0;
        }

        return b;
    }


    /**
     * AES 加密
     *
     * @param content  明文
     * @param password 生成秘钥的关键字
     * @return
     */

    public static String aesEncrypt(String content, String password) {
        try {
            IvParameterSpec zeroIv = new IvParameterSpec(VIPARA.getBytes());
            SecretKeySpec key = new SecretKeySpec(password.getBytes(), "AES");
            Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
            cipher.init(Cipher.ENCRYPT_MODE, key, zeroIv);
            byte[] encryptedData = cipher.doFinal(content.getBytes(bm));
            // return new String(encryptedData,bm);
            return Base64.encode(encryptedData);
//          return byte2HexStr(encryptedData);
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
        } catch (NoSuchPaddingException e) {
            e.printStackTrace();
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        } catch (InvalidKeyException e) {
            e.printStackTrace();
        } catch (IllegalBlockSizeException e) {
            e.printStackTrace();
        } catch (BadPaddingException e) {
            e.printStackTrace();
        } catch (InvalidAlgorithmParameterException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

        return null;
    }

    /**
     * AES 解密
     *
     * @param content  密文
     * @param password 生成秘钥的关键字
     * @return
     */

    public static String aesDecrypt(String content, String password) {
        try {
            byte[] byteMi = Base64.decode(content);
//          byte[] byteMi=  str2ByteArray(content);
            IvParameterSpec zeroIv = new IvParameterSpec(VIPARA.getBytes());
            SecretKeySpec key = new SecretKeySpec(password.getBytes(), "AES");
            Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
            cipher.init(Cipher.DECRYPT_MODE, key, zeroIv);
            byte[] decryptedData = cipher.doFinal(byteMi);
            return new String(decryptedData, "utf-8");
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
        } catch (NoSuchPaddingException e) {
            e.printStackTrace();
        } catch (InvalidKeyException e) {
            e.printStackTrace();
        } catch (IllegalBlockSizeException e) {
            e.printStackTrace();
        } catch (BadPaddingException e) {
            e.printStackTrace();
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        } catch (InvalidAlgorithmParameterException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        return null;
    }

}

Base64

package com.pro.testignore.T20190224.aes;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.OutputStream;
public class Base64 {
    private static final char[] legalChars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"
            .toCharArray();

    public static String encode(byte[] data) {
        int start = 0;
        int len = data.length;
        StringBuffer buf = new StringBuffer(data.length * 3 / 2);

        int end = len - 3;
        int i = start;
        int n = 0;

        while (i <= end) {
            int d = ((((int) data[i]) & 0x0ff) << 16) | ((((int) data[i + 1]) & 0x0ff) << 8)
                    | (((int) data[i + 2]) & 0x0ff);

            buf.append(legalChars[(d >> 18) & 63]);
            buf.append(legalChars[(d >> 12) & 63]);
            buf.append(legalChars[(d >> 6) & 63]);
            buf.append(legalChars[d & 63]);

            i += 3;

            if (n++ >= 14) {
                n = 0;
                buf.append(" ");
            }
        }

        if (i == start + len - 2) {
            int d = ((((int) data[i]) & 0x0ff) << 16) | ((((int) data[i + 1]) & 255) << 8);

            buf.append(legalChars[(d >> 18) & 63]);
            buf.append(legalChars[(d >> 12) & 63]);
            buf.append(legalChars[(d >> 6) & 63]);
            buf.append("=");
        } else if (i == start + len - 1) {
            int d = (((int) data[i]) & 0x0ff) << 16;

            buf.append(legalChars[(d >> 18) & 63]);
            buf.append(legalChars[(d >> 12) & 63]);
            buf.append("==");
        }

        return buf.toString();
    }

    private static int decode(char c) {
        if (c >= 'A' && c <= 'Z')
            return ((int) c) - 65;
        else if (c >= 'a' && c <= 'z')
            return ((int) c) - 97 + 26;
        else if (c >= '0' && c <= '9')
            return ((int) c) - 48 + 26 + 26;
        else
            switch (c) {
                case '+':
                    return 62;
                case '/':
                    return 63;
                case '=':
                    return 0;
                default:
                    throw new RuntimeException("unexpected code: " + c);
            }
    }

    /**
     * Decodes the given Base64 encoded String to a new byte array. The byte
     * array holding the decoded data is returned.
     */

    public static byte[] decode(String s) {

        ByteArrayOutputStream bos = new ByteArrayOutputStream();
        try {
            decode(s, bos);
        } catch (IOException e) {
            throw new RuntimeException();
        }
        byte[] decodedBytes = bos.toByteArray();
        try {
            bos.close();
            bos = null;
        } catch (IOException ex) {
            System.err.println("Error while decoding BASE64: " + ex.toString());
        }
        return decodedBytes;
    }

    private static void decode(String s, OutputStream os) throws IOException {
        int i = 0;

        int len = s.length();

        while (true) {
            while (i < len && s.charAt(i) <= ' ')
                i++;

            if (i == len)
                break;

            int tri = (decode(s.charAt(i)) << 18) + (decode(s.charAt(i + 1)) << 12) + (decode(s.charAt(i + 2)) << 6)
                    + (decode(s.charAt(i + 3)));

            os.write((tri >> 16) & 255);
            if (s.charAt(i + 2) == '=')
                break;
            os.write((tri >> 8) & 255);
            if (s.charAt(i + 3) == '=')
                break;
            os.write(tri & 255);

            i += 4;
        }
    }

}