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| | | package com.ruoyi.common.utils.sql;
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| | |
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| | | import com.ruoyi.common.exception.UtilException;
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| | | import com.ruoyi.common.utils.StringUtils;
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| | |
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| | | /**
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| | |
| | | public class SqlUtil
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| | | {
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| | | /**
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| | | * 仅支持字母、数字、下划线、空格、逗号(支持多个字段排序)
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| | | * 定义常用的 sql关键字
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| | | */
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| | | public static String SQL_PATTERN = "[a-zA-Z0-9_\\ \\,]+";
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| | | public static String SQL_REGEX = "and |extractvalue|updatexml|sleep|exec |insert |select |delete |update |drop |count |chr |mid |master |truncate |char |declare |or |union |like |+|/*|user()";
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| | |
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| | | /**
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| | | * 仅支持字母、数字、下划线、空格、逗号、小数点(支持多个字段排序)
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| | | */
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| | | public static String SQL_PATTERN = "[a-zA-Z0-9_\\ \\,\\.]+";
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| | |
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| | | /**
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| | | * 限制orderBy最大长度
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| | | */
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| | | private static final int ORDER_BY_MAX_LENGTH = 500;
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| | |
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| | | /**
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| | | * 检查字符,防止注入绕过
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| | |
| | | {
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| | | if (StringUtils.isNotEmpty(value) && !isValidOrderBySql(value))
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| | | {
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| | | return StringUtils.EMPTY;
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| | | throw new UtilException("参数不符合规范,不能进行查询");
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| | | }
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| | | if (StringUtils.length(value) > ORDER_BY_MAX_LENGTH)
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| | | {
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| | | throw new UtilException("参数已超过最大限制,不能进行查询");
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| | | }
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| | | return value;
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| | | }
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| | |
| | | {
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| | | return value.matches(SQL_PATTERN);
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| | | }
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| | |
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| | | /**
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| | | * SQL关键字检查
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| | | */
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| | | public static void filterKeyword(String value)
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| | | {
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| | | if (StringUtils.isEmpty(value))
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| | | {
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| | | return;
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| | | }
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| | | String[] sqlKeywords = StringUtils.split(SQL_REGEX, "\\|");
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| | | for (String sqlKeyword : sqlKeywords)
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| | | {
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| | | if (StringUtils.indexOfIgnoreCase(value, sqlKeyword) > -1)
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| | | {
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| | | throw new UtilException("参数存在SQL注入风险");
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| | | }
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| | | }
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| | | }
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| | | }
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