对支付宝进行设置再回主页面进行转义,具体步骤如下。
支付宝APP支付(Java后台生成签名具体步骤)
/**
*支付宝支付
* @param orderId 订单编号
* @param actualPay 实际支付金额
* @return
*/
private String getOrderInfoByAliPay(String orderId,float actualPay) {
//回调页面
String ali_call_back_url = propertiesService.ALI_CALL_BACK_URL
String seller_id = propertiesService.SELLER_ID//商户编号
String[] parameters={
"service=\"mobile.securitypay.pay\"",//固定值(手机快捷支付)
"partner=\"2088421544444\"",//合作身份者ID(16位)
"_input_charset=\"utf-8\"",
"notify_url=\""+ali_call_back_url+"\"",//通知地址
"out_trade_no=\""+orderId+"\"",//商户内部订单号
"subject=\"测试\"",//测试
"payment_type=\"1\"",//固定值
"seller_id=\""+seller_id+"\"",//账户邮箱
"total_fee=\""+"0.01"+"\"",//支付金额(元)
"body=\"订单说明\"",//订单说明
"it_b_pay=\"30m\""(订单过期时间 30分钟过期无效)
}
String signOrderUrl = signAllString(parameters)
return signOrderUrl
}
/**
* 支付宝签名
* @param array
* @return
*/
private String signAllString(String [] array){
StringBuffer sb = new StringBuffer("")
for (int i = 0i <array.lengthi++) {
if(i==(array.length-1)){
sb.append(array[i])
}else{
sb.append(array[i]+"&")
}
}
System.out.println(sb.toString())
String sign = ""
try {
sign = URLEncoder.encode(RSA.sign(sb.toString(), AlipayConfig.private_key, "utf-8"), "utf-8")//private_key私钥
} catch (UnsupportedEncodingException e) {
e.printStackTrace()
}
sb.append("&sign=\""+sign+"\"&")
sb.append("sign_type=\"RSA\"")
return sb.toString()
}
package com.alipay.sign
import javax.crypto.Cipher
import java.io.ByteArrayInputStream
import java.io.ByteArrayOutputStream
import java.io.InputStream
import java.security.KeyFactory
import java.security.PrivateKey
import java.security.PublicKey
import java.security.spec.PKCS8EncodedKeySpec
import java.security.spec.X509EncodedKeySpec
public class RSA{
public static final String SIGN_ALGORITHMS = "SHA1WithRSA"
/**
* RSA签名
* @param content 待签名数据
* @param privateKey 商户私钥
* @param input_charset 编码格式
* @return 签名值
*/
public static String sign(String content, String privateKey, String input_charset)
{
try
{
byte[] decode = Base64.decode(privateKey)
PKCS8EncodedKeySpec priPKCS8 = new PKCS8EncodedKeySpec(decode )
KeyFactory keyf= KeyFactory.getInstance("RSA")
PrivateKey priKey= keyf.generatePrivate(priPKCS8)
java.security.Signature signature = java.security.Signature.getInstance(SIGN_ALGORITHMS)
signature.initSign(priKey)
signature.update( content.getBytes(input_charset) )
byte[] signed = signature.sign()
return Base64.encode(signed)
}
catch (Exception e)
{
e.printStackTrace()
}
return null
}
/**
* RSA验签名检查
* @param content 待签名数据
* @param sign 签名值
* @param ali_public_key 支付宝公钥
* @param input_charset 编码格式
* @return 布尔值
*/
public static boolean verify(String content, String sign, String ali_public_key, String input_charset)
{
try
{
KeyFactory keyFactory = KeyFactory.getInstance("RSA")
byte[] encodedKey = Base64.decode(ali_public_key)
PublicKey pubKey = keyFactory.generatePublic(new X509EncodedKeySpec(encodedKey))
java.security.Signature signature = java.security.Signature
.getInstance(SIGN_ALGORITHMS)
signature.initVerify(pubKey)
signature.update( content.getBytes(input_charset) )
boolean bverify = signature.verify( Base64.decode(sign) )
return bverify
}
catch (Exception e)
{
e.printStackTrace()
}
return false
}
/**
* 解密
* @param content 密文
* @param private_key 商户私钥
* @param input_charset 编码格式
* @return 解密后的字符串
*/
public static String decrypt(String content, String private_key, String input_charset) throws Exception {
PrivateKey prikey = getPrivateKey(private_key)
Cipher cipher = Cipher.getInstance("RSA")
cipher.init(Cipher.DECRYPT_MODE, prikey)
InputStream ins = new ByteArrayInputStream(Base64.decode(content))
ByteArrayOutputStream writer = new ByteArrayOutputStream()
//rsa解密的字节大小最多是128,将需要解密的内容,按128位拆开解密
byte[] buf = new byte[128]
int bufl
while ((bufl = ins.read(buf)) != -1) {
byte[] block = null
if (buf.length == bufl) {
block = buf
} else {
block = new byte[bufl]
for (int i = 0i <bufli++) {
block[i] = buf[i]
}
}
writer.write(cipher.doFinal(block))
}
return new String(writer.toByteArray(), input_charset)
}
/**
* 得到私钥
* @param key 密钥字符串(经过base64编码)
* @throws Exception
*/
public static PrivateKey getPrivateKey(String key) throws Exception {
byte[] keyBytes
keyBytes = Base64.decode(key)
PKCS8EncodedKeySpec keySpec = new PKCS8EncodedKeySpec(keyBytes)
KeyFactory keyFactory = KeyFactory.getInstance("RSA")
PrivateKey privateKey = keyFactory.generatePrivate(keySpec)
return privateKey
}
}
你好,你需要知道RSA的秘钥和签名的算法。首先你需要有RSA的私钥,利用私钥将encrypt的部分进行解密。然后利用签名的算法对解密的结果做一次签名的运算,如何结果和发送过来的sign一样的话,签名就是没有问题的。
C#有RSA和签名算法的库,所以你重要的是有秘钥和知道签名的算法。