php、java、android、ios通用的3des方法(推荐)

import javax.crypto.Cipher;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.DESedeKeySpec;
import javax.crypto.spec.IvParameterSpec;

/**

• 3DES加密工具类
  */
  public class DES3 {
  // 密钥
  private final static String secretKey = "my.oschina.net/penngo?#@" ;
  // 向量
  private final static String iv = "01234567" ;
  // 加解密统一使用的编码方式
  private final static String encoding = "utf-8" ;

  /**

  • 3DES加密

  • @param plainText 普通文本

  • @return

  • @throws Exception
    */
    public static String encode(String plainText) throws Exception {
    Key deskey = null ;
    DESedeKeySpec spec = new DESedeKeySpec(secretKey.getBytes());
    SecretKeyFactory keyfactory = SecretKeyFactory.getInstance( "desede" );
    deskey = keyfactory.generateSecret(spec);

    Cipher cipher = Cipher.getInstance( "desede/CBC/PKCS5Padding" );
    IvParameterSpec ips = new IvParameterSpec(iv.getBytes());
    cipher.init(Cipher.ENCRYPT_MODE,deskey,ips);
    byte [] encryptData = cipher.doFinal(plainText.getBytes(encoding));
    return Base64.encode(encryptData);
    }

  /**

  • 3DES解密

  • @param encryptText 加密文本

  • @return

  • @throws Exception
    */
    public static String decode(String encryptText) throws Exception {
    Key deskey = null ;
    DESedeKeySpec spec = new DESedeKeySpec(secretKey.getBytes());
    SecretKeyFactory keyfactory = SecretKeyFactory.getInstance( "desede" );
    deskey = keyfactory.generateSecret(spec);
    Cipher cipher = Cipher.getInstance( "desede/CBC/PKCS5Padding" );
    IvParameterSpec ips = new IvParameterSpec(iv.getBytes());
    cipher.init(Cipher.DECRYPT_MODE,ips);

    byte [] decryptData = cipher.doFinal(Base64.decode(encryptText));

    return new String(decryptData,encoding);
    }

  public static String padding(String str) {
  byte[] oldByteArray;
  try {
  oldByteArray = str.getBytes("UTF8");
  int numberToPad = 8 - oldByteArray.length % 8;
  byte[] newByteArray = new byte[oldByteArray.length + numberToPad];
  System.arraycopy(oldByteArray,newByteArray,oldByteArray.length);
  for (int i = oldByteArray.length; i < newByteArray.length; ++i) {
  newByteArray[i] = 0;
  }
  return new String(newByteArray,"UTF8");
  } catch (UnsupportedEncodingException e) {
  System.out.println("Crypter.padding UnsupportedEncodingException");
  }
  return null;
  }

  /**

  • Base64编码工具类

  • */
    public static 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 ; 

    }
    }
    }

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