微信支付开始涉及的一些内容

来源：互联网发布：棍刀淘宝编辑：程序博客网时间：2024/06/06 10:40

1、获取腾讯rsa证书格式是pkcs#! ,需要转换，参考如下

PKCS#1 转 PKCS#8:

openssl rsa -RSAPublicKey_in -in <filename> -pubout

PKCS#8 转 PKCS#1:

openssl rsa -pubin -in <filename> -RSAPublicKey_out

Java RSA以 " RSA/ECB/OAEPWITHSHA-1ANDMGF1PADDING"方式加密

/** * 微信支付取到的rsa证书格式是： 公钥格式PKCS#1  ，需要把证书转换成,PKCS#8 * 命令 ： openssl rsa -RSAPublicKey_in -in <filename> -pubout * pem 公钥 加载 * @return * @throws Exception */    public static PublicKey GeneratePublicKeyFromPem(String cerFilePath) throws Exception {             try {        BASE64Decoder base64decoder = new BASE64Decoder();        BufferedReader br = new BufferedReader(new FileReader(cerFilePath));        String s = br.readLine();        StringBuffer publickey = new StringBuffer();        s = br.readLine();        while (s.charAt(0) != '-') {        publickey.append(s + "\r");        s = br.readLine();        }        System.out.println("publickey="+publickey);        byte[] keybyte = base64decoder.decodeBuffer(publickey.toString());        KeyFactory kf = KeyFactory.getInstance("RSA");        X509EncodedKeySpec keySpec = new X509EncodedKeySpec(keybyte);        PublicKey publicKey = kf.generatePublic(keySpec);                     return publicKey;        } catch (Exception e) {            Logger.getLogger("").info("读pem文件生成公钥出错：" +e.toString());            throw e;        }    }    /**     * 微信支付使用的RSA 加密方式     * @param str     * @return     */    public static String RsaEn(String str){    String result=null;    try{    PublicKey  publicKey=GeneratePublicKeyFromPem(str);          Cipher cipher = Cipher.getInstance("RSA/ECB/OAEPWITHSHA-1ANDMGF1PADDING");                cipher = Cipher.getInstance(keyAlgorithm);              cipher.init(Cipher.ENCRYPT_MODE, publicKey); //公钥加密              byte[] encrypt = cipher.doFinal(str.getBytes());                                              result=new BASE64Encoder().encode(encrypt);    }catch(Exception e){    Logger.getLogger("").info("RSA加密出现异常："+e.toString());    e.printStackTrace();    }    return result;    }

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