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/**
* Alipay.com Inc.
* Copyright (c) 2004-2012 All Rights Reserved.
*/
package com.alipay.api.internal.util;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.StringWriter;
import java.security.KeyFactory;
import java.security.PrivateKey;
import java.security.PublicKey;
import java.security.spec.InvalidKeySpecException;
import java.security.spec.PKCS8EncodedKeySpec;
import java.security.spec.X509EncodedKeySpec;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Map;
import java.util.TreeMap;
import javax.crypto.Cipher;
import com.alipay.api.AlipayApiException;
import com.alipay.api.AlipayConstants;
import com.alipay.api.internal.util.codec.Base64;
/**
*
* @author runzhi
*/
public class AlipaySignature {
/** RSA最大加密明文大小 */
private static final int MAX_ENCRYPT_BLOCK = 117;
/** RSA最大解密密文大小 */
private static final int MAX_DECRYPT_BLOCK = 128;
public static String getSignatureContent(RequestParametersHolder requestHolder) {
return getSignContent(getSortedMap(requestHolder));
}
public static Map getSortedMap(RequestParametersHolder requestHolder) {
Map sortedParams = new TreeMap();
AlipayHashMap appParams = requestHolder.getApplicationParams();
if (appParams != null && appParams.size() > 0) {
sortedParams.putAll(appParams);
}
AlipayHashMap protocalMustParams = requestHolder.getProtocalMustParams();
if (protocalMustParams != null && protocalMustParams.size() > 0) {
sortedParams.putAll(protocalMustParams);
}
AlipayHashMap protocalOptParams = requestHolder.getProtocalOptParams();
if (protocalOptParams != null && protocalOptParams.size() > 0) {
sortedParams.putAll(protocalOptParams);
}
return sortedParams;
}
public static String getSignContent(Map sortedParams) {
StringBuffer content = new StringBuffer();
List keys = new ArrayList(sortedParams.keySet());
Collections.sort(keys);
int index = 0;
for (int i = 0; i < keys.size(); i++) {
String key = keys.get(i);
String value = sortedParams.get(key);
if (StringUtils.areNotEmpty(key, value)) {
content.append((index == 0 ? "" : "&") + key + "=" + value);
index++;
}
}
return content.toString();
}
//rsa内容签名
public static String rsaSign(String content, String privateKey, String charset,
String signType) throws AlipayApiException {
if (AlipayConstants.SIGN_TYPE_RSA.equals(signType)) {
return rsaSign(content, privateKey, charset);
} else if (AlipayConstants.SIGN_TYPE_RSA2.equals(signType)) {
return rsa256Sign(content, privateKey, charset);
} else {
throw new AlipayApiException("Sign Type is Not Support : signType=" + signType);
}
}
// sha256WithRsa 加签
public static String rsa256Sign(String content, String privateKey,
String charset) throws AlipayApiException {
try {
PrivateKey priKey = getPrivateKeyFromPKCS8(AlipayConstants.SIGN_TYPE_RSA,
new ByteArrayInputStream(privateKey.getBytes()));
java.security.Signature signature = java.security.Signature
.getInstance(AlipayConstants.SIGN_SHA256RSA_ALGORITHMS);
signature.initSign(priKey);
if (StringUtils.isEmpty(charset)) {
signature.update(content.getBytes());
} else {
signature.update(content.getBytes(charset));
}
byte[] signed = signature.sign();
return new String(Base64.encodeBase64(signed));
} catch (Exception e) {
throw new AlipayApiException("RSAcontent = " + content + "; charset = " + charset, e);
}
}
// sha1WithRsa 加签
public static String rsaSign(String content, String privateKey,
String charset) throws AlipayApiException {
try {
PrivateKey priKey = getPrivateKeyFromPKCS8(AlipayConstants.SIGN_TYPE_RSA,
new ByteArrayInputStream(privateKey.getBytes()));
java.security.Signature signature = java.security.Signature
.getInstance(AlipayConstants.SIGN_ALGORITHMS);
signature.initSign(priKey);
if (StringUtils.isEmpty(charset)) {
signature.update(content.getBytes());
} else {
signature.update(content.getBytes(charset));
}
byte[] signed = signature.sign();
return new String(Base64.encodeBase64(signed));
} catch (InvalidKeySpecException ie) {
throw new AlipayApiException("RSA私钥格式不正确，请检查是否正确配置了PKCS8格式的私钥", ie);
} catch (Exception e) {
throw new AlipayApiException("RSAcontent = " + content + "; charset = " + charset, e);
}
}
public static String rsaSign(Map params, String privateKey,
String charset) throws AlipayApiException {
String signContent = getSignContent(params);
return rsaSign(signContent, privateKey, charset);
}
public static PrivateKey getPrivateKeyFromPKCS8(String algorithm,
InputStream ins) throws Exception {
if (ins == null || StringUtils.isEmpty(algorithm)) {
return null;
}
KeyFactory keyFactory = KeyFactory.getInstance(algorithm);
byte[] encodedKey = StreamUtil.readText(ins).getBytes();
encodedKey = Base64.decodeBase64(encodedKey);
return keyFactory.generatePrivate(new PKCS8EncodedKeySpec(encodedKey));
}
public static String getSignCheckContentV1(Map params) {
if (params == null) {
return null;
}
params.remove("sign");
params.remove("sign_type");
StringBuffer content = new StringBuffer();
List keys = new ArrayList(params.keySet());
Collections.sort(keys);
for (int i = 0; i < keys.size(); i++) {
String key = keys.get(i);
String value = params.get(key);
content.append((i == 0 ? "" : "&") + key + "=" + value);
}
return content.toString();
}
public static String getSignCheckContentV2(Map params) {
if (params == null) {
return null;
}
params.remove("sign");
StringBuffer content = new StringBuffer();
List keys = new ArrayList(params.keySet());
Collections.sort(keys);
for (int i = 0; i < keys.size(); i++) {
String key = keys.get(i);
String value = params.get(key);
content.append((i == 0 ? "" : "&") + key + "=" + value);
}
return content.toString();
}
public static boolean rsaCheckV1(Map params, String publicKey,
String charset) throws AlipayApiException {
String sign = params.get("sign");
String content = getSignCheckContentV1(params);
return rsaCheckContent(content, sign, publicKey, charset);
}
public static boolean rsaCheckV1(Map params, String publicKey,
String charset,String signType) throws AlipayApiException {
String sign = params.get("sign");
String content = getSignCheckContentV1(params);
return rsaCheck(content, sign, publicKey, charset,signType);
}
public static boolean rsaCheckV2(Map params, String publicKey,
String charset) throws AlipayApiException {
String sign = params.get("sign");
String content = getSignCheckContentV2(params);
return rsaCheckContent(content, sign, publicKey, charset);
}
public static boolean rsaCheckV2(Map params, String publicKey,
String charset,String signType) throws AlipayApiException {
String sign = params.get("sign");
String content = getSignCheckContentV2(params);
return rsaCheck(content, sign, publicKey, charset,signType);
}
public static boolean rsaCheck(String content, String sign, String publicKey, String charset,
String signType) throws AlipayApiException {
if (AlipayConstants.SIGN_TYPE_RSA.equals(signType)) {
return rsaCheckContent(content, sign, publicKey, charset);
} else if (AlipayConstants.SIGN_TYPE_RSA2.equals(signType)) {
return rsa256CheckContent(content, sign, publicKey, charset);
} else {
throw new AlipayApiException("Sign Type is Not Support : signType=" + signType);
}
}
public static boolean rsa256CheckContent(String content, String sign, String publicKey,
String charset) throws AlipayApiException {
try {
PublicKey pubKey = getPublicKeyFromX509("RSA",
new ByteArrayInputStream(publicKey.getBytes()));
java.security.Signature signature = java.security.Signature
.getInstance(AlipayConstants.SIGN_SHA256RSA_ALGORITHMS);
signature.initVerify(pubKey);
if (StringUtils.isEmpty(charset)) {
signature.update(content.getBytes());
} else {
signature.update(content.getBytes(charset));
}
return signature.verify(Base64.decodeBase64(sign.getBytes()));
} catch (Exception e) {
throw new AlipayApiException(
"RSAcontent = " + content + ",sign=" + sign + ",charset = " + charset, e);
}
}
public static boolean rsaCheckContent(String content, String sign, String publicKey,
String charset) throws AlipayApiException {
try {
PublicKey pubKey = getPublicKeyFromX509("RSA",
new ByteArrayInputStream(publicKey.getBytes()));
java.security.Signature signature = java.security.Signature
.getInstance(AlipayConstants.SIGN_ALGORITHMS);
signature.initVerify(pubKey);
if (StringUtils.isEmpty(charset)) {
signature.update(content.getBytes());
} else {
signature.update(content.getBytes(charset));
}
return signature.verify(Base64.decodeBase64(sign.getBytes()));
} catch (Exception e) {
throw new AlipayApiException(
"RSAcontent = " + content + ",sign=" + sign + ",charset = " + charset, e);
}
}
public static PublicKey getPublicKeyFromX509(String algorithm,
InputStream ins) throws Exception {
KeyFactory keyFactory = KeyFactory.getInstance(algorithm);
StringWriter writer = new StringWriter();
StreamUtil.io(new InputStreamReader(ins), writer);
byte[] encodedKey = writer.toString().getBytes();
encodedKey = Base64.decodeBase64(encodedKey);
return keyFactory.generatePublic(new X509EncodedKeySpec(encodedKey));
}
/**
* 验签并解密
*
* 目前适用于公众号
* params参数示例：
*
{
*
biz_content=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,
*
sign=rlqgA8O+RzHBVYLyHmrbODVSANWPXf3pSrr82OCO/bm3upZiXSYrX5fZr6UBmG6BZRAydEyTIguEW6VRuAKjnaO/sOiR9BsSrOdXbD5Rhos/Xt7/mGUWbTOt/F+3W0/XLuDNmuYg1yIC/6hzkg44kgtdSTsQbOC9gWM7ayB4J4c=,
* sign_type=RSA,
*
charset=UTF-8
*
}
*
* @param params 请求参数
* @param alipayPublicKey 支付宝公钥
* @param cusPrivateKey 商户私钥
* @param isCheckSign 是否验签
* @param isDecrypt 是否解密
* @return 解密后明文，验签失败则异常抛出
* @throws AlipayApiException 支付异常
*/
public static String checkSignAndDecrypt(Map params, String alipayPublicKey,
String cusPrivateKey, boolean isCheckSign,
boolean isDecrypt) throws AlipayApiException {
String charset = params.get("charset");
String bizContent = params.get("biz_content");
if (isCheckSign) {
if (!rsaCheckV2(params, alipayPublicKey, charset)) {
throw new AlipayApiException("rsaCheck failure:rsaParams=" + params);
}
}
if (isDecrypt) {
return rsaDecrypt(bizContent, cusPrivateKey, charset);
}
return bizContent;
}
/**
* 验签并解密
*
* 目前适用于公众号
* params参数示例：
*
{
*
biz_content=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,
*
sign=rlqgA8O+RzHBVYLyHmrbODVSANWPXf3pSrr82OCO/bm3upZiXSYrX5fZr6UBmG6BZRAydEyTIguEW6VRuAKjnaO/sOiR9BsSrOdXbD5Rhos/Xt7/mGUWbTOt/F+3W0/XLuDNmuYg1yIC/6hzkg44kgtdSTsQbOC9gWM7ayB4J4c=,
* sign_type=RSA,
*
charset=UTF-8
*
}
*
* @param params params
* @param alipayPublicKey 支付宝公钥
* @param cusPrivateKey 商户私钥
* @param isCheckSign 是否验签
* @param isDecrypt 是否解密
* @param signType 检验类型
* @return 解密后明文，验签失败则异常抛出
* @throws AlipayApiException 支付异常
*/
public static String checkSignAndDecrypt(Map params, String alipayPublicKey,
String cusPrivateKey, boolean isCheckSign,
boolean isDecrypt, String signType) throws AlipayApiException {
String charset = params.get("charset");
String bizContent = params.get("biz_content");
if (isCheckSign) {
if (!rsaCheckV2(params, alipayPublicKey, charset,signType)) {
throw new AlipayApiException("rsaCheck failure:rsaParams=" + params);
}
}
if (isDecrypt) {
return rsaDecrypt(bizContent, cusPrivateKey, charset);
}
return bizContent;
}
// /**
// * 加密并签名
// * 目前适用于公众号
// * @param bizContent 待加密、签名内容
// * @param alipayPublicKey 支付宝公钥
// * @param cusPrivateKey 商户私钥
// * @param charset 字符集，如UTF-8, GBK, GB2312
// * @param isEncrypt 是否加密，true-加密 false-不加密
// * @param isSign 是否签名，true-签名 false-不签名
// * @return 加密、签名后xml内容字符串
// *
// * 返回示例：
// *
// * 密文
// * RSA
// * sign
// * RSA
// *
// *
// * @throws AlipayApiException
// */
public static String encryptAndSign(String bizContent, String alipayPublicKey,
String cusPrivateKey, String charset, boolean isEncrypt,
boolean isSign) throws AlipayApiException {
StringBuilder sb = new StringBuilder();
if (StringUtils.isEmpty(charset)) {
charset = AlipayConstants.CHARSET_GBK;
}
sb.append("");
if (isEncrypt) {// 加密
sb.append("");
String encrypted = rsaEncrypt(bizContent, alipayPublicKey, charset);
sb.append("" + encrypted + " ");
sb.append("RSA ");
if (isSign) {
String sign = rsaSign(encrypted, cusPrivateKey, charset);
sb.append("" + sign + " ");
sb.append("RSA ");
}
sb.append(" ");
} else if (isSign) {// 不加密，但需要签名
sb.append("");
sb.append("" + bizContent + " ");
String sign = rsaSign(bizContent, cusPrivateKey, charset);
sb.append("" + sign + " ");
sb.append("RSA ");
sb.append(" ");
} else {// 不加密，不加签
sb.append(bizContent);
}
return sb.toString();
}
// /**
// * 加密并签名
// * 目前适用于公众号
// * @param bizContent 待加密、签名内容
// * @param alipayPublicKey 支付宝公钥
// * @param cusPrivateKey 商户私钥
// * @param charset 字符集，如UTF-8, GBK, GB2312
// * @param isEncrypt 是否加密，true-加密 false-不加密
// * @param isSign 是否签名，true-签名 false-不签名
// * @return 加密、签名后xml内容字符串
// * @throws AlipayApiException
// */
// 返回示例：
// *
// * 密文
// * RSA
// * sign
// * RSA
// *
// *
public static String encryptAndSign(String bizContent, String alipayPublicKey,
String cusPrivateKey, String charset, boolean isEncrypt,
boolean isSign,String signType) throws AlipayApiException {
StringBuilder sb = new StringBuilder();
if (StringUtils.isEmpty(charset)) {
charset = AlipayConstants.CHARSET_GBK;
}
sb.append("");
if (isEncrypt) {// 加密
sb.append("");
String encrypted = rsaEncrypt(bizContent, alipayPublicKey, charset);
sb.append("" + encrypted + " ");
sb.append("RSA ");
if (isSign) {
String sign = rsaSign(encrypted, cusPrivateKey, charset, signType);
sb.append("" + sign + " ");
sb.append("");
sb.append(signType);
sb.append(" ");
}
sb.append(" ");
} else if (isSign) {// 不加密，但需要签名
sb.append("");
sb.append("" + bizContent + " ");
String sign = rsaSign(bizContent, cusPrivateKey, charset, signType);
sb.append("" + sign + " ");
sb.append("");
sb.append(signType);
sb.append(" ");
sb.append(" ");
} else {// 不加密，不加签
sb.append(bizContent);
}
return sb.toString();
}
/**
* 公钥加密
*
* @param content 待加密内容
* @param publicKey 公钥
* @param charset 字符集，如UTF-8, GBK, GB2312
* @return 密文内容
* @throws AlipayApiException 支付异常
*/
public static String rsaEncrypt(String content, String publicKey,
String charset) throws AlipayApiException {
try {
PublicKey pubKey = getPublicKeyFromX509(AlipayConstants.SIGN_TYPE_RSA,
new ByteArrayInputStream(publicKey.getBytes()));
Cipher cipher = Cipher.getInstance(AlipayConstants.SIGN_TYPE_RSA);
cipher.init(Cipher.ENCRYPT_MODE, pubKey);
byte[] data = StringUtils.isEmpty(charset) ? content.getBytes()
: content.getBytes(charset);
int inputLen = data.length;
ByteArrayOutputStream out = new ByteArrayOutputStream();
int offSet = 0;
byte[] cache;
int i = 0;
// 对数据分段加密
while (inputLen - offSet > 0) {
if (inputLen - offSet > MAX_ENCRYPT_BLOCK) {
cache = cipher.doFinal(data, offSet, MAX_ENCRYPT_BLOCK);
} else {
cache = cipher.doFinal(data, offSet, inputLen - offSet);
}
out.write(cache, 0, cache.length);
i++;
offSet = i * MAX_ENCRYPT_BLOCK;
}
byte[] encryptedData = Base64.encodeBase64(out.toByteArray());
out.close();
return StringUtils.isEmpty(charset) ? new String(encryptedData)
: new String(encryptedData, charset);
} catch (Exception e) {
throw new AlipayApiException("EncryptContent = " + content + ",charset = " + charset,
e);
}
}
/**
* 私钥解密
*
* @param content 待解密内容
* @param privateKey 私钥
* @param charset 字符集，如UTF-8, GBK, GB2312
* @return 明文内容
* @throws AlipayApiException 支付异常
*/
public static String rsaDecrypt(String content, String privateKey,
String charset) throws AlipayApiException {
try {
PrivateKey priKey = getPrivateKeyFromPKCS8(AlipayConstants.SIGN_TYPE_RSA,
new ByteArrayInputStream(privateKey.getBytes()));
Cipher cipher = Cipher.getInstance(AlipayConstants.SIGN_TYPE_RSA);
cipher.init(Cipher.DECRYPT_MODE, priKey);
byte[] encryptedData = StringUtils.isEmpty(charset)
? Base64.decodeBase64(content.getBytes())
: Base64.decodeBase64(content.getBytes(charset));
int inputLen = encryptedData.length;
ByteArrayOutputStream out = new ByteArrayOutputStream();
int offSet = 0;
byte[] cache;
int i = 0;
// 对数据分段解密
while (inputLen - offSet > 0) {
if (inputLen - offSet > MAX_DECRYPT_BLOCK) {
cache = cipher.doFinal(encryptedData, offSet, MAX_DECRYPT_BLOCK);
} else {
cache = cipher.doFinal(encryptedData, offSet, inputLen - offSet);
}
out.write(cache, 0, cache.length);
i++;
offSet = i * MAX_DECRYPT_BLOCK;
}
byte[] decryptedData = out.toByteArray();
out.close();
return StringUtils.isEmpty(charset) ? new String(decryptedData)
: new String(decryptedData, charset);
} catch (Exception e) {
throw new AlipayApiException("EncodeContent = " + content + ",charset = " + charset, e);
}
}
}
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