Word Search Library

The Glasswall engine provides deep-file inspection, remediation, sanitisation, and reporting. The engine deconstructs a file to its structural components and builds an internal tree-like representation of the file.

It walks each node of the tree, inspecting, repairing, and sanitising content items before reconstructing a new file.

The Glasswall engine also provides the ability to export and import the engine's internal representation of a file structure in an intermediate format such as XML. This allows internal components of a file to be made available to external programs for additional processing, before recomposing the file to include those externally modified components.

The Glasswall Word Search engine is built on top of the export and import capability, performing text searching in the content and metadata of a file. Search strings, content management, and redaction rules are configured via an XML file.

A user-configurable character substitution map defined in JSON form is used to provide support for text obfuscation.

The engine also comes with built-in regular expression support.

Please also refer to the overview of Word Search & Redaction.

Word Search Configuration

The Word Search configuration specifies the text to search for, or the reqular expression to be applied and how it should be treated when found within the document. The Word Search configuration is an extension to the Glasswall content management.

Examples

Example Word Search policy files and the homoglyph dictionary can be found in the 'config files/sdkwordsearch' folder of the release package. The Word Search XSD can be found in the schemas folder of the release package.

Example Configuration Policy

The following sections showcases different textSetting that can be defined in a configuration policy. For more information on the different settings, refer to Word Search & Redaction.

Text Settings

The following sections showcases different textSetting that can be defined in a configuration policy. For more information on the different settings, refer to Word Search & Redaction.

Allow

<textSearchConfig libVersion="core2">
	<textList>
		<textItem>
            <regex>((25[0-5]|(2[0-4]|1\d|[1-9]|)\d)\.?\b){4}</regex>
            <textSetting>allow</textSetting>
        </textItem>
        <textItem>
            <text>Glasswall</text>
            <textSetting>allow</textSetting>
        </textItem>
	</textList>
</textSearchConfig>

Disallow

<textSearchConfig libVersion="core2">
    <textList>
        <textItem>
            <regex>((25[0-5]|(2[0-4]|1\d|[1-9]|)\d)\.?\b){4}</regex>
            <textSetting>disallow</textSetting>
        </textItem>
        <textItem>
            <text>Glasswall</text>
            <textSetting>disallow</textSetting>
        </textItem>
    </textList>
</textSearchConfig>

Redact

<textSearchConfig libVersion="core2">
    <textList>
        <textItem>
            <regex>((25[0-5]|(2[0-4]|1\d|[1-9]|)\d)\.?\b){4}</regex>
            <textSetting replacementChar="*">redact</textSetting>
        </textItem>
        <textItem>
            <text>Glasswall</text>
            <textSetting replacementChar="*">redact</textSetting>
        </textItem>
    </textList>
</textSearchConfig>

Require

<textSearchConfig libVersion="core2">
    <textList>
        <textItem>
            <regex>((25[0-5]|(2[0-4]|1\d|[1-9]|)\d)\.?\b){4}</regex>
            <textSetting>require</textSetting>
        </textItem>
    </textList>
</textSearchConfig>

System Configuration

As with the core Glasswall engine, additional switches can be found under the sysConfig section. These control the behaviour of the Word Search engine while processing the input files.

<sysConfig>
    <!--interchange_type must always be specified with the value "xml"-->
    <interchange_type>xml</interchange_type>
    <!--Enables/disables processing of text files. False by default.-->
    <enable_text_support>false</enable_text_support>
</sysConfig>

Known Limitations

• Processing both Office and text files at the same time is not possible
• When processing text files, at least one require policy needs to be defined
• interchange_type must always be specified as xml under sysConfig
• Configuration policy that has a combination of the following textSettings with the same text/regex defined will always process the file:
  • require and redact
  • require and disallow
  • redact and allow
  • allow and disallow

Example JSON Homoglyph Config

The JSON file allows the user to create a mapping between characters and corresponding homoglyphs. This allows the engine to consider homoglyphs when generating search expressions, enabling support for homographs (look-alike words) and obfuscated text.

Example

{
	"!": "ǃⵑ",
	"$": "＄",
	"%": "％",
	"&": "ꝸ＆",
	"'": "`´ʹʻʼʽʾˈˊˋ˴ʹ΄՚՝י׳ߴߵᑊᛌ᾽᾿`´῾‘’‛′‵ꞌ＇｀𖽑𖽒",
	"(": "❨❲〔﴾（［",
	")": "❩❳〕﴿）］",
	"*": "٭⁎∗＊𐌟",
	"+": "᛭＋𐊛",
	",": "¸؍٫‚ꓹ，",
	"-": "˗۔‐‑‒–⁃−➖Ⲻ﹘",
	".": "٠۰܁܂․ꓸ꘎．𐩐𝅭",
	"/": "᜵⁁⁄∕╱⟋⧸Ⳇ⼃〳ノ㇓丿／𝈺",
	"0": "OoΟοσОоՕօסه٥ھہە۵߀०০੦૦ଠ୦௦ం౦ಂ೦ംഠ൦ං๐໐ဝ၀ჿዐᴏᴑℴⲞⲟⵔ〇ꓳꬽﮦﮧﮨﮩﮪﮫﮬﮭﻩﻪﻫﻬ０Ｏｏ𐊒𐊫𐐄𐐬𐓂𐓪𐔖𑓐𑢵𑣈𑣗𑣠𝐎𝐨𝑂𝑜𝑶𝒐𝒪𝓞𝓸𝔒𝔬𝕆𝕠𝕺𝖔𝖮𝗈𝗢𝗼𝘖𝘰𝙊𝙤𝙾𝚘𝚶𝛐𝛔𝛰𝜊𝜎𝜪𝝄𝝈𝝤𝝾𝞂𝞞𝞸𝞼𝟎𝟘𝟢𝟬𝟶𞸤𞹤𞺄",
	"1": "Il|ƖǀΙІӀ׀וןا١۱ߊᛁℐℑℓⅠⅼ∣⏽Ⲓⵏꓲﺍﺎ１Ｉｌ￨𐊊𐌉𐌠𖼨𝐈𝐥𝐼𝑙𝑰𝒍𝓁𝓘𝓵𝔩𝕀𝕝𝕴𝖑𝖨𝗅𝗜𝗹𝘐𝘭𝙄𝙡𝙸𝚕𝚰𝛪𝜤𝝞𝞘𝟏𝟙𝟣𝟭𝟷𞣇𞸀𞺀",
	"2": "ƧϨᒿꙄꛯꝚ２𝟐𝟚𝟤𝟮𝟸",
	"3": "ƷȜЗӠⳌꝪꞫ３𑣊𖼻𝈆𝟑𝟛𝟥𝟯𝟹",
	"4": "Ꮞ４𑢯𝟒𝟜𝟦𝟰𝟺",
	"5": "Ƽ５𑢻𝟓𝟝𝟧𝟱𝟻",
	"6": "бᏮⳒ６𑣕𝟔𝟞𝟨𝟲𝟼",
	"7": "７𐓒𑣆𝈒𝟕𝟟𝟩𝟳𝟽",
	"8": "Ȣȣ৪੪ଃ８𐌚𝟖𝟠𝟪𝟴𝟾𞣋",
	"9": "৭੧୨൭ⳊꝮ９𑢬𑣌𑣖𝟗𝟡𝟫𝟵𝟿",
	"A": "4ΑАᎪᗅᴀꓮꭺＡ𐊠𖽀𝐀𝐴𝑨𝒜𝓐𝔄𝔸𝕬𝖠𝗔𝘈𝘼𝙰𝚨𝛢𝜜𝝖𝞐",
	"B": "ʙΒВвᏴᏼᗷᛒℬꓐꞴＢ𐊂𐊡𐌁𝐁𝐵𝑩𝓑𝔅𝔹𝕭𝖡𝗕𝘉𝘽𝙱𝚩𝛣𝜝𝝗𝞑",
	"C": "ϹСᏟℂℭⅭⲤꓚＣ𐊢𐌂𐐕𐔜𑣩𑣲𝐂𝐶𝑪𝒞𝓒𝕮𝖢𝗖𝘊𝘾𝙲🝌",
	"D": "ᎠᗞᗪᴅⅅⅮꓓꭰＤ𝐃𝐷𝑫𝒟𝓓𝔇𝔻𝕯𝖣𝗗𝘋𝘿𝙳",
	"E": "ΕЕᎬᴇℰ⋿ⴹꓰꭼＥ𐊆𑢦𑢮𝐄𝐸𝑬𝓔𝔈𝔼𝕰𝖤𝗘𝘌𝙀𝙴𝚬𝛦𝜠𝝚𝞔",
	"F": "ϜᖴℱꓝꞘＦ𐊇𐊥𐔥𑢢𑣂𝈓𝐅𝐹𝑭𝓕𝔉𝔽𝕱𝖥𝗙𝘍𝙁𝙵𝟊",
	"G": "ɢԌԍᏀᏳᏻꓖꮐＧ𝐆𝐺𝑮𝒢𝓖𝔊𝔾𝕲𝖦𝗚𝘎𝙂𝙶",
	"H": "ʜΗНнᎻᕼℋℌℍⲎꓧꮋＨ𐋏𝐇𝐻𝑯𝓗𝕳𝖧𝗛𝘏𝙃𝙷𝚮𝛨𝜢𝝜𝞖",
	"I": "",
	"J": "ͿЈᎫᒍᴊꓙꞲꭻＪ𝐉𝐽𝑱𝒥𝓙𝔍𝕁𝕵𝖩𝗝𝘑𝙅𝙹",
	"K": "ΚКᏦᛕKⲔꓗＫ𐔘𝐊𝐾𝑲𝒦𝓚𝔎𝕂𝕶𝖪𝗞𝘒𝙆𝙺𝚱𝛫𝜥𝝟𝞙",
	"L": "ʟᏞᒪℒⅬⳐⳑꓡꮮＬ𐐛𐑃𐔦𑢣𑢲𖼖𝈪𝐋𝐿𝑳𝓛𝔏𝕃𝕷𝖫𝗟𝘓𝙇𝙻",
	"M": "ΜϺМᎷᗰᛖℳⅯⲘꓟＭ𐊰𐌑𝐌𝑀𝑴𝓜𝔐𝕄𝕸𝖬𝗠𝘔𝙈𝙼𝚳𝛭𝜧𝝡𝞛",
	"N": "ɴΝℕⲚꓠＮ𐔓𝐍𝑁𝑵𝒩𝓝𝔑𝕹𝖭𝗡𝘕𝙉𝙽𝚴𝛮𝜨𝝢𝞜",
	"O": "0",
	"P": "ΡРᏢᑭᴘᴩℙⲢꓑꮲＰ𐊕𝐏𝑃𝑷𝒫𝓟𝔓𝕻𝖯𝗣𝘗𝙋𝙿𝚸𝛲𝜬𝝦𝞠",
	"Q": "ℚⵕＱ𝐐𝑄𝑸𝒬𝓠𝔔𝕼𝖰𝗤𝘘𝙌𝚀",
	"R": "ƦʀᎡᏒᖇᚱℛℜℝꓣꭱꮢＲ𐒴𖼵𝈖𝐑𝑅𝑹𝓡𝕽𝖱𝗥𝘙𝙍𝚁",
	"S": "$ЅՏᏕᏚꓢＳ𐊖𐐠𖼺𝐒𝑆𝑺𝒮𝓢𝔖𝕊𝕾𝖲𝗦𝘚𝙎𝚂",
	"T": "ŤΤτТтᎢᴛ⊤⟙ⲦꓔꭲＴ𐊗𐊱𐌕𑢼𖼊𝐓𝑇𝑻𝒯𝓣𝔗𝕋𝕿𝖳𝗧𝘛𝙏𝚃𝚻𝛕𝛵𝜏𝜯𝝉𝝩𝞃𝞣𝞽🝨",
	"U": "Սሀᑌ∪⋃ꓴＵ𐓎𑢸𖽂𝐔𝑈𝑼𝒰𝓤𝔘𝕌𝖀𝖴𝗨𝘜𝙐𝚄",
	"V": "Ѵ٧۷ᏙᐯⅤⴸꓦꛟＶ𐔝𑢠𖼈𝈍𝐕𝑉𝑽𝒱𝓥𝔙𝕍𝖁𝖵𝗩𝘝𝙑𝚅",
	"W": "ԜᎳᏔꓪＷ𑣦𑣯𝐖𝑊𝑾𝒲𝓦𝔚𝕎𝖂𝖶𝗪𝘞𝙒𝚆",
	"X": "ΧХ᙭ᚷⅩ╳ⲬⵝꓫꞳＸ𐊐𐊴𐌗𐌢𐔧𑣬𝐗𝑋𝑿𝒳𝓧𝔛𝕏𝖃𝖷𝗫𝘟𝙓𝚇𝚾𝛸𝜲𝝬𝞦",
	"Y": "ΥϒУҮᎩᎽⲨꓬＹ𐊲𑢤𖽃𝐘𝑌𝒀𝒴𝓨𝔜𝕐𝖄𝖸𝗬𝘠𝙔𝚈𝚼𝛶𝜰𝝪𝞤",
	"Z": "ΖᏃℤℨꓜＺ𐋵𑢩𑣥𝐙𝑍𝒁𝒵𝓩𝖅𝖹𝗭𝘡𝙕𝚉𝚭𝛧𝜡𝝛𝞕",
	"a": "@ɑαа⍺ａ𝐚𝑎𝒂𝒶𝓪𝔞𝕒𝖆𝖺𝗮𝘢𝙖𝚊𝛂𝛼𝜶𝝰𝞪",
	"b": "ƄЬᏏᖯｂ𝐛𝑏𝒃𝒷𝓫𝔟𝕓𝖇𝖻𝗯𝘣𝙗𝚋",
	"c": "ϲсᴄⅽⲥꮯｃ𐐽𝐜𝑐𝒄𝒸𝓬𝔠𝕔𝖈𝖼𝗰𝘤𝙘𝚌",
	"d": "ԁᏧᑯⅆⅾꓒｄ𝐝𝑑𝒅𝒹𝓭𝔡𝕕𝖉𝖽𝗱𝘥𝙙𝚍",
	"e": "еҽ℮ℯⅇꬲｅ𝐞𝑒𝒆𝓮𝔢𝕖𝖊𝖾𝗲𝘦𝙚𝚎",
	"f": "ſϝքẝꞙꬵｆ𝐟𝑓𝒇𝒻𝓯𝔣𝕗𝖋𝖿𝗳𝘧𝙛𝚏𝟋",
	"g": "ƍɡցᶃℊｇ𝐠𝑔𝒈𝓰𝔤𝕘𝖌𝗀𝗴𝘨𝙜𝚐",
	"h": "һհᏂℎｈ𝐡𝒉𝒽𝓱𝔥𝕙𝖍𝗁𝗵𝘩𝙝𝚑",
	"i": "ıɩɪ˛ͺιіӏᎥιℹⅈⅰ⍳ꙇꭵｉ𑣃𝐢𝑖𝒊𝒾𝓲𝔦𝕚𝖎𝗂𝗶𝘪𝙞𝚒𝚤𝛊𝜄𝜾𝝸𝞲",
	"j": "ϳјⅉｊ𝐣𝑗𝒋𝒿𝓳𝔧𝕛𝖏𝗃𝗷𝘫𝙟𝚓",
	"k": "ｋ𝐤𝑘𝒌𝓀𝓴𝔨𝕜𝖐𝗄𝗸𝘬𝙠𝚔",
	"l": "1",
	"m": "ｍ",
	"n": "ոռｎ𝐧𝑛𝒏𝓃𝓷𝔫𝕟𝖓𝗇𝗻𝘯𝙣𝚗",
	"o": "",
	"p": "ρϱр⍴ⲣｐ𝐩𝑝𝒑𝓅𝓹𝔭𝕡𝖕𝗉𝗽𝘱𝙥𝚙𝛒𝛠𝜌𝜚𝝆𝝔𝞀𝞎𝞺𝟈",
	"q": "ԛգզｑ𝐪𝑞𝒒𝓆𝓺𝔮𝕢𝖖𝗊𝗾𝘲𝙦𝚚",
	"r": "гᴦⲅꭇꭈꮁｒ𝐫𝑟𝒓𝓇𝓻𝔯𝕣𝖗𝗋𝗿𝘳𝙧𝚛",
	"s": "$ƽѕꜱꮪｓ𐑈𑣁𝐬𝑠𝒔𝓈𝓼𝔰𝕤𝖘𝗌𝘀𝘴𝙨𝚜",
	"t": "ｔ𝐭𝑡𝒕𝓉𝓽𝔱𝕥𝖙𝗍𝘁𝘵𝙩𝚝",
	"u": "ʋυսᴜꞟꭎꭒｕ𐓶𑣘𝐮𝑢𝒖𝓊𝓾𝔲𝕦𝖚𝗎𝘂𝘶𝙪𝚞𝛖𝜐𝝊𝞄𝞾",
	"v": "νѵטᴠⅴ∨⋁ꮩｖ𑜆𑣀𝐯𝑣𝒗𝓋𝓿𝔳𝕧𝖛𝗏𝘃𝘷𝙫𝚟𝛎𝜈𝝂𝝼𝞶",
	"w": "ɯѡԝաᴡꮃｗ𑜊𑜎𑜏𝐰𝑤𝒘𝓌𝔀𝔴𝕨𝖜𝗐𝘄𝘸𝙬𝚠",
	"x": "×хᕁᕽ᙮ⅹ⤫⤬⨯ｘ𝐱𝑥𝒙𝓍𝔁𝔵𝕩𝖝𝗑𝘅𝘹𝙭𝚡",
	"y": "ɣʏγуүყᶌỿℽꭚｙ𑣜𝐲𝑦𝒚𝓎𝔂𝔶𝕪𝖞𝗒𝘆𝘺𝙮𝚢𝛄𝛾𝜸𝝲𝞬",
	"z": "ᴢꮓｚ𑣄𝐳𝑧𝒛𝓏𝔃𝔷𝕫𝖟𝗓𝘇𝘻𝙯𝚣",
	"£": "₤",
	"©": "Ⓒ",
	"®": "Ⓡ"
}

Example Analysis Report

Here is an example analysis report that is generated when the search string is set to 'Glasswall', irrespective of the textSetting used. This includes an ItemMatchCount for every pattern that is matched in a given file.

<gw:WordItem>
    <gw:Name>Glasswall</gw:Name>
    <gw:ItemMatchCount>1</gw:ItemMatchCount>
    <gw:Locations>
        <gw:Location>
            <gw:Offset>463</gw:Offset>
            <gw:Page>0</gw:Page>
            <gw:Paragraph>0</gw:Paragraph>
        </gw:Location>
    </gw:Locations>
</gw:WordItem>

API Functions

Status

The APIs GwWordSearch and GwWordSearchDone returns a Status that indicates the result of the API call. API GwWordSearchTranslateStatus returns a description for a passed in Status.

C++

Each of the APIs return a Status, which is defined as follows:

enum Status {
    ws_disallowedItemFound = -1024,
    ws_requiredItemNotFound = -1025,
    ws_illegalActionRedact = -1026,
    ws_illegalActionRequire = -1027,
    ws_illegalActionNoRequire = -1028,
    ws_filetypeUnsupported = -1029,
    eFail = 0,
    eSuccess = 1,
};

C#

To integrate Glasswall Word Search in C# the Glasswall Word Search C# wrapper is required. Each of the APIs returns a WordSearchStatus type, which is defined as follows:

/// <summary>
///     Indicates whether the Word Search process was successful (WordSearchStatus.Success)
///     or not (WordSearchStatus.Fail). Zero or negative values indicate a failure.
/// </summary>
public enum WordSearchStatus
{
    DisallowedItemFound = -1024,
    RequiredItemNotFound = -1025,
    IllegalActionRedact = -1026,
    IllegalActionRequire = -1027,
    IllegalActionNoRequire = -1028,
    FiletypeUnsupported = -1029,
    Fail = 0,
    Success
}

Java

To integrate Glasswall Word Search in java the Glasswall Word Search Java wrapper is required. Each of the APIs returns a GlasswallWordSearchResult` type, which is defined as follows:

package com.glasswallsolutions;

/**
 * Class used to hold the results from a Word Search process.
 */
public class GlasswallWordSearchResult
{
    /**
     * The XML analysis report
     */
    public String report;

    /**
     * The processed document
     */
    public byte[] outputDocument;

    /**
     * boolean indicating whether the process was successful (true) or not (false)
     */
    public boolean success;

    public GlasswallWordSearchResult()
    {
        report = null;
        outputDocument = null;
        success = false;
    }
}

Python

To integrate Glasswall Word Search in Python the Glasswall Python wrapper is required. Each of the APIs returns a generic GwReturnObj object, which will contain the attributes: "status" (int), "output_file" (bytes), "output_report" (bytes). The int statuses are defined as follows:

# glasswall\libraries\word_search\successes.py

class Success(WordSearchSuccess):
    """ WordSearch success code 1. """
    pass


success_codes = {
    1: Success,
}

# glasswall\libraries\word_search\errors.py

class UnknownErrorCode(WordSearchError):
    """ Unknown error code. """
    pass

class Fail(WordSearchError):
    """ WordSearch error code 0. """
    pass


class DisallowedItemFound(WordSearchError):
    """ WordSearch error code -1024. Item disallowed by policy found in file. """
    pass


class RequiredItemNotFound(WordSearchError):
    """ WordSearch error code -1025. Item required by policy not found in file. """
    pass


class IllegalActionRedact(WordSearchError):
    """ WordSearch error code -1026. Redact action specified but filetype doesn't support redaction. """
    pass


class IllegalActionRequire(WordSearchError):
    """ WordSearch error code -1027. Require action specified but filetype doesn't support redaction. """
    pass


class IllegalActionNoRequire(WordSearchError):
    """ WordSearch error code -1028. Require action not specified but filetype needs one. """
    pass


class FiletypeUnsupported(WordSearchError):
    """ WordSearch error code -1029. Filetype supported by Editor but not by Word Search. """
    pass


error_codes = {
    0: Fail,
    -1024: DisallowedItemFound,
    -1025: RequiredItemNotFound,
    -1026: IllegalActionRedact,
    -1027: IllegalActionRequire,
    -1028: IllegalActionNoRequire,
    -1029: FiletypeUnsupported,
}

JavaScript

To integrate Glasswall Word Search in JavaScript the Glasswall Word Search JavaScript wrapper is required. Each of the APIs returns a WordSearchStatus type, which is defined as follows:

/**
 * Used to indicate whether the Word Search process was successful or not
 */
export const enum WordSearchStatus {
    ws_disallowedItemFound = -1024,     
    ws_requiredItemNotFound = -1025,    
    ws_illegalActionRedact = -1026,     
    ws_illegalActionRequire = -1027,    
    ws_illegalActionNoRequire = -1028,  
    ws_filetypeUnsupported = -1029,
    eFail    = 0,
    eSuccess = 1,
}

GwWordSearch

This is used to call the Word Search engine, process the specified input file and produce an output file along with a Word Search analysis report.

C++

Status GwWordSearch(
    void* input_buffer,
    size_t input_buffer_len,
    void** output_buffer,
    size_t* output_buffer_len,
    void** output_report_buffer,
    size_t* output_report_buffer_len,
    const char* homoglpyhs,
    const char* xml_config_string
)

C#

To integrate Glasswall Word Search in C# the Glasswall Word Search C# wrapper is required.

public WordSearchStatus GwWordSearch(
    byte[] inputBuffer,
    out byte[] outputFileBuffer,
    out String outputAnalysisReport,
    string homoglyphs,
    string xmlConfigString
)

Java

To integrate Glasswall Word Search in Java the Glasswall Word Search Java wrapper is required.

public native GlasswallWordSearchResult wordSearch(
    byte[] inputDocument,
    String homoglyphs,
    String xmlConfig
)

Note: Unlike some other supported languages, all output is returned in the GlasswallWordSearchResult object for Java.

Python

To integrate Glasswall Word Search in Python the Glasswall Python wrapper is required.

# glasswall\libraries\word_search\word_search.py

def redact_file(self, input_file: Union[str, bytes, bytearray, io.BytesIO], content_management_policy: Union[str, bytes, bytearray, io.BytesIO], output_file: Union[None, str] = None, output_report: Union[None, str] = None, homoglyphs: Union[None, str, bytes, bytearray, io.BytesIO] = None, raise_unsupported: bool = True):
    """ Redacts text from input_file using the given content_management_policy and homoglyphs file, optionally writing the redacted file and report to the paths specified by output_file and output_report.

    Args:
        input_file (Union[str, bytes, bytearray, io.BytesIO]): The input file path or bytes.
        content_management_policy (Union[str, bytes, bytearray, io.BytesIO)]): The content management policy to apply.
        output_file (Union[None, str], optional): Default None. If str, write output_file to that path.
        output_report (Union[None, str], optional): Default None. If str, write output_file to that path.
        homoglyphs (Union[None, str, bytes, bytearray, io.BytesIO)], optional): Default None. The homoglyphs json file path or bytes.
        raise_unsupported (bool, optional): Default True. Raise exceptions when Glasswall encounters an error. Fail silently if False.

    Returns:
        gw_return_object (glasswall.GwReturnObj): An instance of class glasswall.GwReturnObj containing attributes: "status" (int), "output_file" (bytes), "output_report" (bytes)
    """


def redact_directory(self, input_directory: str, content_management_policy: Union[str, bytes, bytearray, io.BytesIO, glasswall.content_management.policies.policy.Policy], output_directory: Optional[str] = None, output_report_directory: Optional[str] = None, homoglyphs: Union[None, str, bytes, bytearray, io.BytesIO] = None, raise_unsupported: bool = True):
    """ Redacts all files in a directory and it's subdirectories using the given content_management_policy and homoglyphs file. The redacted files are written to output_directory maintaining the same directory structure as input_directory.

    Args:
        input_directory (str): The input directory containing files to redact.
        output_directory (str): The output directory where the redacted files will be written.
        output_report_directory (Optional[str], optional): Default None. If str, the output directory where analysis reports for each redacted file will be written.
        content_management_policy (Union[str, bytes, bytearray, io.BytesIO)]): The content management policy to apply.
        homoglyphs (Union[None, str, bytes, bytearray, io.BytesIO)], optional): Default None. The homoglyphs file path, str, or bytes.
        raise_unsupported (bool, optional): Default True. Raise exceptions when Glasswall encounters an error. Fail silently if False.

    Returns:
        redacted_files_dict (dict): A dictionary of file paths relative to input_directory, and glasswall.GwReturnObj with attributes: "status" (int), "output_file" (bytes), "output_report" (bytes)
    """

Note: Unlike some other supported languages, all output is returned in the GwReturnObj object for Python.

JavaScript

/**
     * Perform word search on input buffer, using the applied config and homoglyphs
     * @param {Buffer} inputBuffer A buffer containing the contents of the document to be processed.
     * @param {String} homoglyphs A homoglyphs file that will be used as part of the Word Search process (UTF-8 string).
     * @param {String} configXml The content management XML policy (utf-8 string).
     * @returns {WordSearchResult} The result from Word Search.
     */
    wordSearch(inputBuffer: Buffer, homoglyphs: string, configXml: string): WordSearchResult

Note: Unlike some other supported languages, all output is returned in the WordSearchResult object for JavaScript.

GWWordSearchDone

This is used to release any resources that have been allocated by the Word Search engine. This function needs to be called after each call made to the GwWordSearch function otherwise memory leaks will occur.

This API call is only required in C++.

C++

Status GwWordSearchDone(
    void** output_buffer,
    size_t* output_buffer_len,
    void** output_report_buffer,
    size_t* output_report_buffer_len)

Other Languages

For all languages covered by the Glasswall wrappers, the GwWordSearchDone API function is internally called within the wrapper, meaning the API is not exposed to the user.

GwWordSearchVersion

This is used to retrieve the current library version number.

C++

const char* GwWordSearchVersion(void)

GwWordSearchTranslateStatus

Translate the provided error code into a user friendly error message.

C++

const char* GwWordSearchTranslateStatus(Status errorCode)

Common Issues

Word Search is not processing files

If Word Search is not processing files correctly then there may be a few reasons that can cause this:

• When running Word Search, please ensure that all the Glasswall libraries are located in the same directory, which also needs to be set as the current working directory. Glasswall searches within the current working directory for it's dependencies and if they are not found then files will not be processed correctly.

Example Usage

Here we have an example application that takes an input file, processes it using the Glasswall Word Search engine, and then produces an output file alongside a Word Search analysis report. This example application expects the following command line parameters:

1. Path to the content management configuration XML.
2. Path to the homoglyphs file.
3. Path to the input file to be processed.
4. Path to the output file where the processed file will be stored.

C++

#include <iostream>
#include <fstream>
#include <string>
#include <vector>
#include <cstddef>
#include <stdexcept>

#include "api.h"

using namespace std;

// Read the file into a buffer
vector<uint8_t> readFile(ifstream &fileHandle, const string &filePath, bool nullTerminator)
{
    fileHandle.exceptions(ifstream::failbit | ifstream::badbit);
    fileHandle.open(filePath.c_str(), ios::binary | ios::ate);

    vector<uint8_t> data;
    streamsize size = fileHandle.tellg();
    fileHandle.seekg(0, ios::beg);

    data.resize(size + 1);
    fileHandle.read(reinterpret_cast<char *>(data.data()), size);

    if (nullTerminator)
    {
        data.push_back(0);
    }

    return data;
}

int main(int argc, char **argv)
{
    if (argc != 5)
    {
        cerr << "Usage: <Path to XML Config> <Path to Homoglyphs> <Input file> <Output file>" << endl;
        return -1;
    }

    // Read commandline arguments
    string xmlFilePath(argv[1]);
    string homoglyphsFilePath(argv[2]);
    string inputFilePath(argv[3]);
    string outputFilePath(argv[4]);

    // Create file handles for input files
    ifstream xmlFileHandle;
    ifstream homoglyphsFileHandle;
    ifstream inputFileHandle;

    // Read files into buffers
    vector<uint8_t> xmlBuffer = readFile(xmlFileHandle, xmlFilePath, true);                         // Buffer containing the XML content management settings. This is null terminated
    vector<uint8_t> homoglyphsBuffer = readFile(homoglyphsFileHandle, homoglyphsFilePath, true);    // Buffer containing the homoglyphs. This is null terminated
    vector<uint8_t> inputBuffer = readFile(inputFileHandle, inputFilePath, false);                  // Buffer containing the input file to be processed

    // Create variables for output buffers
    void * outputBuffer = nullptr;          // Output buffer for processed file
    size_t outputBufferSize = 0;            // Output buffer size
    void * outputReportBuffer = nullptr;    // Output buffer for report file
    size_t outputReportBufferSize = 0;      // Output report buffer size

    // Run Word Search and redact
    Status status = GwWordSearch(inputBuffer.data(), inputBuffer.size(), &outputBuffer, &outputBufferSize, &outputReportBuffer, &outputReportBufferSize, reinterpret_cast<const char*>(homoglyphsBuffer.data()), reinterpret_cast<const char *>(xmlBuffer.data()));

    if (status == Status::eSuccess)
    {
        // Write out the processed output file if the Word Search and redact was successful
        ofstream outputFileHandle(outputFilePath, ios::binary | ios::trunc);

        if (outputFileHandle.is_open())
        {
            outputFileHandle.write(static_cast<const char *>(outputBuffer), outputBufferSize);
        }

        outputFileHandle.close();
    }

    // Write out the report file
    ofstream analysisFileHandle(outputFilePath + ".xml", ios::binary | ios::trunc);

    if (analysisFileHandle.is_open())
    {
        analysisFileHandle.write(static_cast<const char *>(outputReportBuffer), outputReportBufferSize);
    }

    analysisFileHandle.close();

    // Call done to release any allocated resources
    GwWordSearchDone(&outputBuffer, &outputBufferSize, &outputReportBuffer, &outputReportBufferSize);

    return 0;
}

C#

using System;
using System.IO;

namespace glasswall.word.search.csharp.testing
{
    internal class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine("Word Search test");
            if (args.Length != 4)
            {
                Console.WriteLine("usage: <Xml Config> <Homoglyphs> <Input Directory> <OutputDirectory>");
                Console.WriteLine("Parameters specified: \n{0}", string.Join("\n", args));
                return;
            }

            string xmlConfigPath = args[0];
            string homoglyphsPath = args[1];
            string inputDirectory = args[2];
            string outputDirectory = args[3];

            if (!File.Exists(xmlConfigPath))
            {
                Console.Error.WriteLine("Xml config does not exist: {0}", xmlConfigPath);
                return;
            }

            if (!File.Exists(homoglyphsPath))
            {
                Console.Error.WriteLine("Homoglyphs does not exist: {0}", homoglyphsPath);
                return;
            }

            if (!Directory.Exists(inputDirectory))
            {
                Console.Error.WriteLine("Input directory does not exist: {0}", inputDirectory);
                return;
            }

            Directory.CreateDirectory(outputDirectory);

            using (FileStream fileStream = new FileStream(Path.Combine(outputDirectory, "ProcessLog.txt"), FileMode.OpenOrCreate, FileAccess.Write))
            {
                using (StreamWriter writer = new StreamWriter(fileStream))
                {
                    writer.WriteLine("> Word Search Library version: {0}", GlasswallWordSearch.GwWordSearchVersion());

                    string xmlConfig = File.ReadAllText(xmlConfigPath);
                    string homoglyphs = File.ReadAllText(homoglyphsPath);

                    foreach (string path in Directory.EnumerateFiles(inputDirectory, "*", SearchOption.AllDirectories))
                    {
                        writer.WriteLine("> Processing file: {0}", path);
                        string inputDirectoryPath = path.Substring(inputDirectory.Length + 1);
                        string directory = Path.Combine(outputDirectory, inputDirectoryPath);
                        Directory.CreateDirectory(directory);
                        processFile(path, directory, homoglyphs, xmlConfig);
                    }
                }
            }

            return;
        }
        static void WriteAllBytes(string path, byte[] data)
        {
            if (data == null)
            {
                File.Create(path);
            }
            else
            {
                File.WriteAllBytes(path, data);
            }
        }
        public static void processFile(string inputFile, string outputDirectory, string homoglyphs, string xmlConfig)
        {

            using (FileStream fileStream = new FileStream(Path.Combine(outputDirectory, Path.GetFileName(inputFile) + ".log"), FileMode.OpenOrCreate, FileAccess.Write))
            {
                using (StreamWriter writer = new StreamWriter(fileStream))
                {
                    // Word Search
                    writer.WriteLine(">> Run Word Search");
                    byte[] inputFileBuffer = File.ReadAllBytes(inputFile);
                    byte[] outputBuffer, outputReportBuffer;
                    GlasswallWordSearch.WordSearchStatus status = GlasswallWordSearch.GwWordSearch(inputFileBuffer, out outputBuffer, out outputReportBuffer, homoglyphs, xmlConfig);
                    writer.WriteLine("Status is: {0}", status);

                    if (outputBuffer != null)
                    {
                        WriteAllBytes(Path.Combine(outputDirectory, Path.GetFileName(inputFile)), outputBuffer);
                    }

                    if (outputReportBuffer != null)
                    {
                        WriteAllBytes(Path.Combine(outputDirectory, Path.GetFileName(inputFile)) + ".xml", outputReportBuffer);
                    }
                }
            }
        }
    }
}

Java

package com.glasswallsolutions;

import java.lang.System;
import java.io.*;
import com.glasswallsolutions.*;
import java.nio.file.Paths;

public class MainTest {

	public static byte[] readAllBytes(InputStream inputStream) throws IOException
	{
		final int bufLen = 4 * 0x400; // 4KB
		byte[] buf = new byte[bufLen];
		int readLen;

		try (ByteArrayOutputStream outputStream = new ByteArrayOutputStream()) {
			while ((readLen = inputStream.read(buf, 0, bufLen)) != -1)
				outputStream.write(buf, 0, readLen);

			return outputStream.toByteArray();
		}
	}

	public static void main(String[] args) throws Exception {
		if (args.length != 4)
		{
			System.out.println("Usage: <Input Directory> <Output Directory> <Homoglyphs File> <Config XML>");
			System.exit(-1);
		}

		File inputDirectory = new File(args[0]);
		File outputDirectory = new File(args[1]);
		outputDirectory.delete();
		outputDirectory.mkdir();
		String homoglyphsFile = args[2];
		String configXmlFile = args[3];

		String homoglyphs = null;
		String configXML = null;

		GlasswallWordSearch glasswallWordSearch = new GlasswallWordSearch();

		try(FileInputStream homoglyphsInputStream = new FileInputStream(homoglyphsFile))
		{
			homoglyphs = new String(readAllBytes(homoglyphsInputStream));
		}

		try(FileInputStream configXmlInputStream = new FileInputStream(configXmlFile))
		{
			configXML = new String(readAllBytes(configXmlInputStream));
		}

		System.out.println("Word Search version: " + glasswallWordSearch.version());

		for (File inputFile : inputDirectory.listFiles())
		{
			try
			{
				System.out.println("Processing file: " + inputFile.getAbsolutePath());

				File fileOutputDirectory = new File(Paths.get(outputDirectory.getAbsolutePath(), inputFile.getName()).toString());
				fileOutputDirectory.mkdir();
				String fileOutputPath = Paths.get(fileOutputDirectory.getAbsolutePath(), inputFile.getName()).toString();

				try(FileInputStream inputStream = new FileInputStream(inputFile))
				{
					byte[] fileData = readAllBytes(inputStream);

					GlasswallWordSearchResult result = glasswallWordSearch.wordSearch(fileData, homoglyphs, configXML);

					System.out.println("Status: " + result.success);

					if (result.outputDocument != null)
					{
						try(FileOutputStream fileOutputStream = new FileOutputStream(fileOutputPath))
						{
							fileOutputStream.write(result.outputDocument);
						}
					}

					if (result.report != null)
					{
						try(FileOutputStream fileOutputStream = new FileOutputStream(fileOutputPath + ".xml"))
						{
							fileOutputStream.write(result.report.getBytes());
						}
					}
				}
			}
			catch(Exception ex)
			{
				System.err.println("Exception occurred: " + ex.getMessage());
				ex.printStackTrace(System.err);

			}
		}
	}
}

Python

For further examples see: https://pypi.org/project/glasswall/

import glasswall


# Load the Glasswall WordSearch library
word_search = glasswall.WordSearch(r"C:\gwpw\libraries\10.0")

# Redact occurrences of the text "lorem" and "ipsum" within each file in the input_directory, writing the redacted file
# to a new path in the output_directory
results = word_search.redact_directory(
    input_directory=r"C:\gwpw\input_redact",
    output_directory=r"C:\gwpw\output\word_search\redact_directory",
    content_management_policy=glasswall.content_management.policies.WordSearch(
        config={
            "textSearchConfig": {
                "@libVersion": "core2",
                "textList": [
                    {"name": "textItem", "switches": [
                        {"name": "text", "value": "lorem"},
                        {"name": "textSetting", "@replacementChar": "*", "value": "redact"},
                    ]},
                    {"name": "textItem", "switches": [
                        {"name": "text", "value": "ipsum"},
                        {"name": "textSetting", "@replacementChar": "*", "value": "redact"},
                    ]},
                ]
            }
        }
    )
)

JavaScript

import fs from 'fs';
import path from 'path';
import { GlasswallWordSearch, GlasswallWordSearchNative, WordSearchResult, WordSearchStatus } from '../index'

let main = function()
{
    const args = process.argv;

    if (args.length === 7)
    {
        let wordSearchDllPath = path.resolve(args[2]);
        let inputDirectory    = path.resolve(args[3]);
        let outputDirectory   = path.resolve(args[4]);
        let homoglyphsPath    = path.resolve(args[5]);
        let configXmlPath     = path.resolve(args[6]);

        let handler = new GlasswallWordSearchNative(wordSearchDllPath, { enableLogging: true});
        let glasswallWordSearch = new GlasswallWordSearch(handler);
        console.log("Glasswall Word Search version: " + glasswallWordSearch.version())

        if (!fs.existsSync(inputDirectory))
        {
            console.log('Input Directory does not exist: ' + inputDirectory);
            process.exit(-1);
        }

        if (!fs.existsSync(homoglyphsPath))
        {
            console.log('Homoglyphs file does not exist: ' + homoglyphsPath);
            process.exit(-1);
        }

        if (!fs.existsSync(configXmlPath))
        {
            console.log('Config XML file does not exist: ' + configXmlPath);
            process.exit(-1);
        }

        let homoglyphs = fs.readFileSync(homoglyphsPath, 'utf8');
        let configXml  = fs.readFileSync(configXmlPath , 'utf8');

        fs.mkdirSync(outputDirectory, {recursive: true});

        fs.readdirSync(inputDirectory).forEach(file => {
            try
            {
                let fullFilePath = path.join(inputDirectory, file);

                if (fs.statSync(fullFilePath).isFile())
                {
                    console.log('Processing file: ' + fullFilePath);
                    let outputFileDirectory = path.join(outputDirectory, file);
                    fs.mkdirSync(outputFileDirectory);
                    let inputBuffer = fs.readFileSync(fullFilePath);
                    let wordSearchResult = glasswallWordSearch.wordSearch(inputBuffer, homoglyphs, configXml);
                    console.log("Status: " + wordSearchResult.status);

                    if (wordSearchResult.outputBuffer != undefined && wordSearchResult.outputBuffer != null)
                    {
                        fs.writeFileSync(path.join(outputFileDirectory, file), wordSearchResult.outputBuffer);
                    }

                    if (wordSearchResult.analysisXmlReport != undefined && wordSearchResult.analysisXmlReport != null)
                    {
                        fs.writeFileSync(path.join(outputFileDirectory, file + ".xml"), wordSearchResult.analysisXmlReport);
                    }
                }
            }
            catch(error)
            {
                console.log("Exception occurred: " + error);
                console.trace(error);
            }

        })
    }
    else
    {
        console.log("Usage: Application <Library File> <Input Directory> <Output Directory> <Homoglyphs File> <Config XML>");
        process.exit(-1);
    }
}

if (require.main === module){
    main();
}