package com.hx.mybatis.aes.springbean;
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import com.alibaba.druid.sql.SQLUtils;
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import com.alibaba.druid.sql.ast.SQLExpr;
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import com.alibaba.druid.sql.ast.SQLStatement;
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import com.alibaba.druid.sql.ast.expr.SQLBinaryOpExpr;
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import com.alibaba.druid.sql.ast.expr.SQLInListExpr;
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import com.alibaba.druid.sql.ast.statement.*;
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import com.alibaba.druid.sql.dialect.mysql.ast.clause.MySqlSelectIntoStatement;
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import com.alibaba.druid.sql.dialect.mysql.ast.statement.MySqlDeleteStatement;
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import com.alibaba.druid.sql.dialect.mysql.ast.statement.MySqlInsertStatement;
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import com.alibaba.druid.sql.dialect.mysql.ast.statement.MySqlUpdateStatement;
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import com.alibaba.druid.sql.dialect.mysql.parser.MySqlStatementParser;
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import com.alibaba.druid.sql.dialect.mysql.visitor.MySqlSchemaStatVisitor;
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import com.alibaba.druid.sql.visitor.SQLASTOutputVisitor;
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import com.alibaba.druid.stat.TableStat;
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import com.alibaba.druid.util.JdbcConstants;
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import com.alibaba.druid.util.JdbcUtils;
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import com.hx.util.StringUtils;
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import java.util.Collection;
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import java.util.List;
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import java.util.Map;
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/**
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* sql语句处理工具
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* @author CJH 2022-01-12
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*/
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public class SqlUtils {
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/**查询加密数据处理，只对查询做处理，select返回不做处理
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* @param sql sql语句
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* @param aesKeysTable aes秘钥
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* @return
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*/
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public static String selectSql(String sql,Map<String,Map<String,String>> aesKeysTable){
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MySqlStatementParser parser = new MySqlStatementParser(sql);
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SQLSelectStatement sqlStatement = (SQLSelectStatement) parser.parseSelect();
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//获取格式化的slq语句
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sql = sqlStatement.toString();
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//解析select查询
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//SQLSelect sqlSelect = sqlStatement.getSelect()
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//获取sql查询块
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SQLSelectQueryBlock sqlSelectQuery = (SQLSelectQueryBlock)sqlStatement.getSelect().getQuery() ;
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StringBuffer out = new StringBuffer() ;
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//创建sql解析的标准化输出
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SQLASTOutputVisitor sqlastOutputVisitor = SQLUtils.createFormatOutputVisitor(out , null , JdbcUtils.MYSQL) ;
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//获取表和别名
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ExportTableAliasVisitor visitorTable = new ExportTableAliasVisitor();
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sqlStatement.accept(visitorTable);
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Map<String,String> tableMaps = visitorTable.getTableMap();
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//获取所有的字段
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MySqlSchemaStatVisitor visitor = new MySqlSchemaStatVisitor();
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sqlStatement.accept(visitor);
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//遍历所有字段
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Collection<TableStat.Column> columns= visitor.getColumns();
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StringBuilder sqlWhere = new StringBuilder();
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StringBuilder sqlSelect = new StringBuilder();
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String expr = null;
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sqlSelect.append("SELECT ");
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//解析select返回的数据字段项
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for (SQLSelectItem sqlSelectItem : sqlSelectQuery.getSelectList()) {
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if(sqlSelect.length() > 7){
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sqlSelect.append(",");
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}
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expr = sqlSelectItem.getExpr().toString();
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if(expr.indexOf("SELECT") == -1){
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sqlSelect.append(expr);
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if(!StringUtils.isEmpty(sqlSelectItem.getAlias())){
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sqlSelect.append(" AS "+sqlSelectItem.getAlias());
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}
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}else{
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sqlSelect.append("(");
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sqlSelect.append(selectSqlHandle(expr,aesKeysTable,tableMaps,columns));
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sqlSelect.append(")");
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if(!StringUtils.isEmpty(sqlSelectItem.getAlias())){
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sqlSelect.append(" AS "+sqlSelectItem.getAlias());
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}
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}
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}
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//解析from
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out.delete(0, out.length()) ;
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sqlSelectQuery.getFrom().accept(sqlastOutputVisitor) ;
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sqlWhere.append(" FROM "+out);
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//解析where
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out.delete(0, out.length()) ;
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sqlSelectQuery.getWhere().accept(sqlastOutputVisitor) ;
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sqlWhere.append(" WHERE "+out+" ");
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if(sqlSelectQuery.getGroupBy() != null){
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out.delete(0, out.length()) ;
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sqlSelectQuery.getGroupBy().accept(sqlastOutputVisitor) ;
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sqlWhere.append(" "+out);
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}
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if(sqlSelectQuery.getOrderBy() != null){
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out.delete(0, out.length()) ;
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sqlSelectQuery.getOrderBy().accept(sqlastOutputVisitor) ;
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sqlWhere.append(" "+out);
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}
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if(sqlSelectQuery.getLimit() != null){
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out.delete(0, out.length()) ;
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sqlSelectQuery.getLimit().accept(sqlastOutputVisitor) ;
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sqlWhere.append(" "+out);
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}
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//处理where需要加密得字段
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sql = sqlWhere.toString();
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if(!StringUtils.isEmpty(sql)){
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Map<String,String> aesKeys = null;
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String aeskey = null;
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//把剩下的拼接上来
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String tableAl = null;
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for(TableStat.Column column:columns){
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aesKeys= aesKeysTable.get(column.getTable());
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if(aesKeys == null){
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continue;
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}
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aeskey = aesKeys.getOrDefault(column.getName(),null);
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if(StringUtils.isEmpty(aeskey)){
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continue;
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}
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tableAl = tableMaps.get(column.getTable());
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if(!StringUtils.isEmpty(tableAl)){
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tableAl = tableAl+"."+column.getName();
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}else{
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tableAl = column.getName();
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}
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sql = sql.replaceAll("( |\\n|\\()"+tableAl+"( |\\n|\\))"," AES_DECRYPT(UNHEX("+tableAl+"),'"+aeskey+"') ");
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}
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}
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return sqlSelect.toString()+sql;
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}
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public static String selectSqlHandle(String sql,Map<String,Map<String,String>> aesKeysTable
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,Map<String,String> tableMaps,Collection<TableStat.Column> columns){
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MySqlStatementParser parser = new MySqlStatementParser(sql);
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SQLSelectStatement sqlStatement = (SQLSelectStatement) parser.parseSelect();
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//获取格式化的slq语句
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sql = sqlStatement.toString();
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//解析select查询
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//SQLSelect sqlSelect = sqlStatement.getSelect() ;
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//获取sql查询块
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SQLSelectQueryBlock sqlSelectQuery = (SQLSelectQueryBlock)sqlStatement.getSelect().getQuery() ;
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StringBuffer out = new StringBuffer() ;
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//创建sql解析的标准化输出
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SQLASTOutputVisitor sqlastOutputVisitor = SQLUtils.createFormatOutputVisitor(out , null , JdbcUtils.MYSQL) ;
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StringBuilder sqlWhere = new StringBuilder();
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StringBuilder sqlSelect = new StringBuilder();
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String expr = null;
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sqlSelect.append("SELECT ");
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//解析select返回的数据字段项
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for (SQLSelectItem sqlSelectItem : sqlSelectQuery.getSelectList()) {
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if(sqlSelect.length() > 7){
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sqlSelect.append(",");
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}
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expr = sqlSelectItem.getExpr().toString();
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if(expr.indexOf("SELECT") == -1){
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sqlSelect.append(expr);
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if(!StringUtils.isEmpty(sqlSelectItem.getAlias())){
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sqlSelect.append(" AS "+sqlSelectItem.getAlias());
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}
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}else{
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sqlSelect.append("(");
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selectSqlHandle(expr,aesKeysTable,tableMaps,columns);
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sqlSelect.append(")");
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if(!StringUtils.isEmpty(sqlSelectItem.getAlias())){
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sqlSelect.append(" AS "+sqlSelectItem.getAlias());
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}
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}
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}
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//解析from
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out.delete(0, out.length()) ;
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sqlSelectQuery.getFrom().accept(sqlastOutputVisitor) ;
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sqlWhere.append(" FROM "+out);
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//解析where
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out.delete(0, out.length()) ;
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sqlSelectQuery.getWhere().accept(sqlastOutputVisitor) ;
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sqlWhere.append(" WHERE "+out+" ");
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if(sqlSelectQuery.getGroupBy() != null){
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out.delete(0, out.length()) ;
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sqlSelectQuery.getGroupBy().accept(sqlastOutputVisitor) ;
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sqlWhere.append(" "+out);
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}
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if(sqlSelectQuery.getOrderBy() != null){
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out.delete(0, out.length()) ;
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sqlSelectQuery.getOrderBy().accept(sqlastOutputVisitor) ;
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sqlWhere.append(" "+out);
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}
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if(sqlSelectQuery.getLimit() != null){
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out.delete(0, out.length()) ;
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sqlSelectQuery.getLimit().accept(sqlastOutputVisitor) ;
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sqlWhere.append(" "+out);
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}
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sql = sqlWhere.toString();
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if(!StringUtils.isEmpty(sql)){
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Map<String,String> aesKeys = null;
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String aeskey = null;
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//把剩下的拼接上来
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String tableAl = null;
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for(TableStat.Column column:columns){
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aesKeys= aesKeysTable.get(column.getTable());
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if(aesKeys == null){
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continue;
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}
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aeskey = aesKeys.getOrDefault(column.getName(),null);
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if(StringUtils.isEmpty(aeskey)){
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continue;
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}
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tableAl = tableMaps.get(column.getTable());
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if(!StringUtils.isEmpty(tableAl)){
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tableAl = tableAl+"."+column.getName();
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}else{
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tableAl = column.getName();
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}
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sql = sql.replaceAll("( |\\n|\\()"+tableAl+"( |\\n|\\))"," AES_DECRYPT(UNHEX("+tableAl+"),'"+aeskey+"') ");
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}
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}
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return sqlSelect.toString()+sql;
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}
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/**新增加密数据处理
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* @param sql sql语句
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* @param aesKeysTable aes秘钥
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* @return
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*/
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public static String insertSql(String sql,Map<String,Map<String,String>> aesKeysTable){
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//装载重写的sql语句
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StringBuilder splicingSql = new StringBuilder();
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sql = SQLUtils.format(sql, JdbcConstants.MYSQL);
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String[] datas = sql.split("VALUES",2);
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splicingSql.append(datas[0]+"VALUES ");
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//重新拼接SQL语句
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//解析sql语句
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MySqlStatementParser parser = new MySqlStatementParser(sql);
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SQLStatement statement = parser.parseStatement();
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MySqlInsertStatement insert = (MySqlInsertStatement)statement;
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String insertName = insert.getTableName().getSimpleName();
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//根据表名称获取到AES秘钥
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Map<String,String> aesKeys= aesKeysTable.get(insertName);
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if(aesKeys == null){
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return sql;
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}
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//获取所有的字段
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List<SQLExpr> columns = insert.getColumns();
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String fildValue = null;
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String aeskey = null;
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//遍历值
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List<SQLInsertStatement.ValuesClause> vcl = insert.getValuesList();
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for(int j = 0; j<vcl.size(); j++){
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if( j != 0){
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splicingSql.append(",");
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}
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for(int i = 0;i < columns.size();i++){
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//查询改字段是否需要加密
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aeskey = aesKeys.getOrDefault(columns.get(i).toString(),null);
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fildValue = vcl.get(j).getValues().get(i).toString();
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if(i == 0){
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splicingSql.append("(");
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if(aeskey != null && fildValue.indexOf("AES_ENCRYPT") == -1){
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splicingSql.append("HEX(AES_ENCRYPT("+fildValue+",'"+aeskey+"'))");
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}else{
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splicingSql.append(fildValue);
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}
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}else if(i == columns.size()-1){
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splicingSql.append(",");
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if(aeskey != null && fildValue.indexOf("AES_ENCRYPT") == -1){
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splicingSql.append("HEX(AES_ENCRYPT("+fildValue+",'"+aeskey+"'))");
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}else{
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splicingSql.append(fildValue);
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}
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splicingSql.append(")");
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}else{
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splicingSql.append(",");
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if(aeskey != null && fildValue.indexOf("AES_ENCRYPT") == -1){
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splicingSql.append("HEX(AES_ENCRYPT("+fildValue+",'"+aeskey+"'))");
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}else{
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splicingSql.append(fildValue);
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}
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}
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}
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}
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return splicingSql.toString();
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}
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/**更新加密数据处理
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* @param sql sql语句
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* @param aesKeysTable aes秘钥
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* @return
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*/
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public static String updateSql(String sql,Map<String,Map<String,String>> aesKeysTable){
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//装载重写的sql语句
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StringBuilder splicingSql = new StringBuilder();
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//sql = SQLUtils.format(sql, JdbcConstants.MYSQL);
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MySqlStatementParser parser = new MySqlStatementParser(sql);
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SQLStatement sqlStatement = parser.parseStatement();
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//获取格式化的slq语句
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sql = sqlStatement.toString();
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MySqlUpdateStatement updateStatement = (MySqlUpdateStatement)sqlStatement;
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String insertName = updateStatement.getTableName().getSimpleName();
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String[] datas = sql.split("WHERE",2);
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Map<String,String> aesKeys = aesKeysTable.get(insertName);
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splicingSql.append("UPDATE "+insertName+" SET ");
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String aeskey = null;
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String fildValue = null;
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List<SQLUpdateSetItem> items = updateStatement.getItems();
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for(int i = 0;i<items.size();i++){
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if(i != 0){
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splicingSql.append(",");
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}
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SQLUpdateSetItem item = items.get(i);
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//查询改字段是否需要加密
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aeskey = aesKeys.getOrDefault(item.getColumn().toString(),null);
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fildValue = item.getValue().toString();
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if(aeskey != null && fildValue.indexOf("AES_ENCRYPT") == -1){
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splicingSql.append(item.getColumn()+" = HEX(AES_ENCRYPT("+fildValue+",'"+aeskey+"'))");
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}else{
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splicingSql.append(item.getColumn()+" = "+fildValue);
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}
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}
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String sqlWhere = " WHERE";
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//把剩下的拼接上来
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if(datas.length > 1){
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for(int i =1;i<datas.length;i++){
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sqlWhere = sqlWhere+datas[i];
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}
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parser = new MySqlStatementParser("SELECT * FROM "+insertName+" "+sqlWhere);
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sqlStatement = parser.parseStatement();
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ExportTableAliasVisitor visitorTable = new ExportTableAliasVisitor();
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sqlStatement.accept(visitorTable);
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//获取表和别名
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Map<String,String> tableMaps = visitorTable.getTableMap();
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tableMaps.put(insertName,null);
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//获取所有的字段
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MySqlSchemaStatVisitor visitor = new MySqlSchemaStatVisitor();
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sqlStatement.accept(visitor);
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String tableAl = null;
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//遍历所有字段
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Collection<TableStat.Column> columns= visitor.getColumns();
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for(TableStat.Column column:columns){
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aesKeys= aesKeysTable.get(column.getTable());
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if(aesKeys == null){
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continue;
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}
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aeskey = aesKeys.getOrDefault(column.getName(),null);
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if(StringUtils.isEmpty(aeskey)){
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continue;
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}
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tableAl = tableMaps.get(column.getTable());
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if(!StringUtils.isEmpty(tableAl)){
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tableAl = tableAl+"."+column.getName();
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}else{
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tableAl = column.getName();
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}
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sqlWhere = sqlWhere.replaceAll("( |\\n|\\()"+tableAl+"( |\\n|\\))"," AES_DECRYPT(UNHEX("+tableAl+"),'"+aeskey+"') ");
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}
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}
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splicingSql.append(sqlWhere.toString());
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return splicingSql.toString();
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}
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/**删除加密数据处理
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* @param sql sql语句
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* @param aesKeysTable aes秘钥
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* @return
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*/
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public static String deleteSql(String sql,Map<String,Map<String,String>> aesKeysTable){
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//装载重写的sql语句
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StringBuilder splicingSql = new StringBuilder();
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//sql = SQLUtils.format(sql, JdbcConstants.MYSQL);
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MySqlStatementParser parser = new MySqlStatementParser(sql);
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SQLStatement sqlStatement = parser.parseStatement();
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//获取格式化的slq语句
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sql = sqlStatement.toString();
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MySqlDeleteStatement deleteStatement = (MySqlDeleteStatement)sqlStatement;
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String insertName = deleteStatement.getTableName().getSimpleName();
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String[] datas = sql.split("WHERE",2);
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Map<String,String> aesKeys = aesKeysTable.get(insertName);
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splicingSql.append("DELETE FROM "+insertName);
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String aeskey = null;
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String sqlWhere = " WHERE";
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//把剩下的拼接上来
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if(datas.length > 1){
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for(int i =1;i<datas.length;i++){
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sqlWhere = sqlWhere+datas[i];
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}
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parser = new MySqlStatementParser("SELECT * FROM "+insertName+" "+sqlWhere);
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sqlStatement = parser.parseStatement();
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ExportTableAliasVisitor visitorTable = new ExportTableAliasVisitor();
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sqlStatement.accept(visitorTable);
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//获取表和别名
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Map<String,String> tableMaps = visitorTable.getTableMap();
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tableMaps.put(insertName,null);
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//获取所有的字段
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MySqlSchemaStatVisitor visitor = new MySqlSchemaStatVisitor();
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sqlStatement.accept(visitor);
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String tableAl = null;
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//遍历所有字段
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Collection<TableStat.Column> columns= visitor.getColumns();
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for(TableStat.Column column:columns){
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aesKeys= aesKeysTable.get(column.getTable());
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if(aesKeys == null){
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continue;
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}
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aeskey = aesKeys.getOrDefault(column.getName(),null);
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if(StringUtils.isEmpty(aeskey)){
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continue;
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}
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tableAl = tableMaps.get(column.getTable());
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if(!StringUtils.isEmpty(tableAl)){
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tableAl = tableAl+"."+column.getName();
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}else{
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tableAl = column.getName();
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}
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sqlWhere = sqlWhere.replaceAll("( |\\n|\\()"+tableAl+"( |\\n|\\))"," AES_DECRYPT(UNHEX("+tableAl+"),'"+aeskey+"') ");
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}
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}
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splicingSql.append(sqlWhere.toString());
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return splicingSql.toString();
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}
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}
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