private static EncryptParseItem ParseEncryptItem(string body, string rootNode, int indexOfRootNode)
{
int signDataStartIndex = indexOfRootNode + rootNode.Length + 2;
int indexOfSign = body.IndexOf("\"" + AlipayConstants.SIGN + "\"");
int signDataEndIndex = indexOfSign - 1;
if (signDataEndIndex < 0)
{
signDataEndIndex = body.Length - 1;
}
int length = signDataEndIndex - signDataStartIndex;
string encyptContent = body.Substring(signDataStartIndex + 1, length - 2);
EncryptParseItem item = new EncryptParseItem();
item.encryptContent = encyptContent;
item.startIndex = signDataStartIndex;
item.endIndex = signDataEndIndex;
return(item);
}
private static EncryptParseItem ParseEncryptItem(string body, string rootNode, int indexOfRootNode)
{
// 第一个字母+长度+>
int signDataStartIndex = indexOfRootNode + rootNode.Length + 1;
string xmlStartNode = "<" + AlipayConstants.ENCRYPT_NODE_NAME + ">";
string xmlEndNode = "</" + AlipayConstants.ENCRYPT_NODE_NAME + ">";
int indexOfEncryptNode = body.IndexOf(xmlEndNode);
if (indexOfEncryptNode < 0)
{
EncryptParseItem item = new EncryptParseItem();
item.encryptContent = null;
item.startIndex = 0;
item.endIndex = 0;
return(item);
}
int startIndex = signDataStartIndex + xmlStartNode.Length;
int bizLen = indexOfEncryptNode - startIndex;
string encryptBizContent = body.Substring(startIndex, bizLen);
EncryptParseItem item2 = new EncryptParseItem();
item2.encryptContent = encryptBizContent;
item2.startIndex = signDataStartIndex;
item2.endIndex = indexOfEncryptNode + xmlEndNode.Length;
return(item2);
}
public string EncryptSourceData(IAopRequest <T> request, string body, string encryptType, string encryptKey, string charset)
{
EncryptParseItem item = ParseEncryptData(request, body);
string bodyIndexContent = body.Substring(0, item.startIndex);
string bodyEndContent = body.Substring(item.endIndex);
string encryptContent = AlipayEncrypt.AesDencrypt(encryptKey, item.encryptContent, charset);
return(bodyIndexContent + encryptContent + bodyEndContent);
}
public string EncryptSourceData(IAopRequest <T> request, string body, string encryptType, string encryptKey, string charset)
{
if (!"AES".Equals(encryptType))
{
throw new AopException("API only support AES!");
}
EncryptParseItem item = parseEncryptData(request, body);
string bodyIndexContent = body.Substring(0, item.startIndex);
string bodyEndexContent = body.Substring(item.endIndex);
//TODO 解密逻辑
string bizContent = AlipayEncrypt.AesDencrypt(encryptKey, item.encryptContent, charset);
return(bodyIndexContent + bizContent + bodyEndexContent);
}
/// <summary>
/// 解析加密节点
/// </summary>
/// <param name="request"></param>
/// <param name="body"></param>
/// <returns></returns>
private static EncryptParseItem parseEncryptData(IAopRequest <T> request, string body)
{
string rootNode = request.GetApiName().Replace(".", "_") + AlipayConstants.RESPONSE_SUFFIX;
string errorRootNode = AlipayConstants.ERROR_RESPONSE;
int indexOfRootNode = body.IndexOf(rootNode);
int indexOfErrorRoot = body.IndexOf(errorRootNode);
EncryptParseItem result = null;
if (indexOfRootNode > 0)
{
result = ParseEncryptItem(body, rootNode, indexOfRootNode);
}
else if (indexOfErrorRoot > 0)
{
result = ParseEncryptItem(body, errorRootNode, indexOfErrorRoot);
}
return(result);
}