The GSM package [ver. 0.22.0]

## The GSM package [ver. 0.22.0] - [Article](https://www.wuss.org/proceedings/2023/WUSS-2023-Paper-189.pdf) explaining details of "macro hiding" added as an additional content to the package.
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diff --git a/README.md b/README.md
@@ -8,10 +8,10 @@ to create secured macros stored in SAS Proc FCMP functions.
 The dataset with functions can be shared between different operating systems
 and allows to generate macros on site without showing their code.
 
-SHA256 digest for the latest version of `GSM`: F*2FECDDB568B38E206CA4ADA6FDEF5209C0A08B99401A1510D777BABF9DA54682
+SHA256 digest for the latest version of `GSM`: F*8D80AEB2DB7A4531BA124240E7A12EBE717293048561A877EB5B6B039BD11D18
 
 [**Documentation for GSM**](./gsm.md "Documentation for GSM")
 
-[Article describing the idea](https://www.wuss.org/wuss-2023-conference-proceedings/ "Article about the idea GSM")
+[Article describing the idea](https://www.wuss.org/proceedings/2023/WUSS-2023-Paper-189.pdf/ "Article about the idea GSM")
 
 To work with a package use the [**SAS Packages Framework**](https://github.com/yabwon/SAS_PACKAGES/blob/main/README.md "SPFinit").
diff --git a/gsm.md b/gsm.md
@@ -8,7 +8,7 @@
 ---
 
 
-# The GSM package [ver. 0.21.1] <a name="gsm-package"></a> ###############################################
+# The GSM package [ver. 0.22.0] <a name="gsm-package"></a> ###############################################
 
 The **GSM** (a.k.a. *Generate Secure Macros*) package allows
 to create secured macros stored in SAS Proc FCMP functions.
@@ -94,10 +94,14 @@ Package contains:
 Required SAS Components: 
   `Base SAS Software`
 
-*SAS package generated by generatePackage, version 20230905*
+Package contains additional content, run:  %loadPackageAddCnt(GSM)  to load it
+or look for the gsm_AdditionalContent directory in the Packages fileref
+localization (only if additional content was deployed during the installation process).
+
+*SAS package generated by generatePackage, version 20231107*
 
 The SHA256 hash digest for package GSM: 
-`F*2FECDDB568B38E206CA4ADA6FDEF5209C0A08B99401A1510D777BABF9DA54682` 
+`F*8D80AEB2DB7A4531BA124240E7A12EBE717293048561A877EB5B6B039BD11D18` 
 
 
 ## >>> `%GSM()` macro: <<< <a name="gsm-macro"></a> #######################

diff --git a/gsm.zip b/gsm.zip
diff --git a/hist/0.22.0/gsm.md b/hist/0.22.0/gsm.md
@@ -0,0 +1,336 @@
+- [The GSM package](#gsm-package)
+- [Content description](#content-description)
+  * [`%GSM()` macro](#gsm-macro)  
+  * [`%GSMpck_makeFCMPcode()` macro](#gsmpck-makefcmpcode-macro)  
+
+  * [License](#license)
+
+---
+
+
+# The GSM package [ver. 0.22.0] <a name="gsm-package"></a> ###############################################
+
+The **GSM** (a.k.a. *Generate Secure Macros*) package allows
+to create secured macros stored in SAS Proc FCMP functions.
+The dataset with functions can be shared and allows to generate 
+macros without showing their code.
+
+The GSM package is basically an automated version of the following:
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~sas
+proc fcmp outlib = work.gsm.secure ENCRYPT;
+  function generateMacro() $;
+    rc = RESOLVE('
+      %macro secretMacro(x) / SECURE;
+        data test;
+         a = "&x.";
+        run;
+      %mend;
+    ');
+    return (rc);
+  endsub;
+run;
+
+/* share work.gsm dataset */
+options cmplib = work.gsm;
+data _null_;
+  rc = generateMacro();
+  put rc=;
+run;
+
+/* enjoy */
+%secretMacro(42)
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+See examples for more details.
+
+[Recording of presentation with "how it works" description (in Polish)](https://www.youtube.com/watch?v=LtaWPe2sgRY&t=1s "YouTube").
+
+[The WUSS 2023 Conference article describing the idea](https://www.wuss.org/wuss-2023-conference-proceedings/ "Article about the idea GSM")
+
+
+*How to use it:* 
+ - Copy all files with your secured macros code into a directory. 
+   Best approach is to have one file for one macro.
+ - Copy a path to the directory.
+ - Run the following code:
+   ```
+   %GSM(<the path to directory>, cmplib=<name of the dataset>)
+   ```
+ - Share generated `ZIP` file (unzip and run the code).
+
+**Limitations:** 
+ - Single macro file cannot be longer than 32760 bytes.
+
+ - Multiline text variable. Consider the following code text file:
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+%macro~test()/SECURE;~#@
+data~test;~#@
+a~=~"abc~#@
+~#@
+def";~#@
+put~a~hex20.;~#@
+run;~#@
+%mend~test;~#@
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+where `~` symbols the space character, 
+`#` symbols the carriage return (`0D`), 
+and `@` symbols the line feed (`0A`).
+The code file is scanned and inserted into 
+the `resolve()` function argument in a "byte by byte"
+fashion hence also the "end of line" characters are included.
+As the result value of variable `a` will be: 
+
+`a = "abc~#@~#@def"`. 
+
+If you want to use the `GSM` package avoid 
+such "style" of coding in your macros.
+
+
+---
+
+Package contains: 
+  1.   macro      gsm 
+  2.   macro      gsmpck_makefcmpcode 
+
+Required SAS Components: 
+  `Base SAS Software`
+
+Package contains additional content, run:  %loadPackageAddCnt(GSM)  to load it
+or look for the gsm_AdditionalContent directory in the Packages fileref
+localization (only if additional content was deployed during the installation process).
+
+*SAS package generated by generatePackage, version 20231107*
+
+The SHA256 hash digest for package GSM: 
+`F*8D80AEB2DB7A4531BA124240E7A12EBE717293048561A877EB5B6B039BD11D18` 
+
+
+## >>> `%GSM()` macro: <<< <a name="gsm-macro"></a> #######################
+
+The `%GSM()` macro is the main macro of 
+the **GSM** (a.k.a. *Generate Secure Macros*) package. 
+
+It converts a list of macros provided by the user into
+a data set of the Proc FCMP functions. The macros are stored
+in functions are encrypted which allow to share them without 
+showing their code. *Important* thing is that macros provided 
+by the user *has* to be "secure", i.e. the `secure` option has to 
+be added to the macro definition. See the example:
+
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~sas
+%macro secretMacro(x) / SECURE; /* <- the secure option */
+  <... some code ...>
+%mend secretMacro;
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+
+As a result a zip file, containing dataset with functions and 
+code to be executed on site, is generated.
+
+Since encrypted code is stored in a SAS dataset it has
+no limitation in sharing between operating systems (like catalogs have).
+
+*Limitation:* Due to the `Resolve()` function limitations 
+ a single macro file cannot be longer than 32760 bytes.
+
+*Notes:* 
+- All macros have to have the `secure` option added, i.e. `%macro aMacroname(...) / SECURE ;`.
+- During the execution a test macro, named `%GSMpck_dummyMacroForTests()`, is generated.
+- The `%GSM()` macro calls the `%GSMpck_makeFCMPcode(...)` macro internally.
+
+### SYNTAX: ###################################################################
+
+The basic syntax is the following, the `<...>` means optional parameters:
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~sas
+%GSM( 
+   path
+ <,trim=0>
+ <,cmplib=work.generateMacros>
+ <,source2=>
+ <,outpath=>
+ <,encodingRestricted=>
+ <,secret=>
+ <,lineEnd=>
+ <,encrypt=>
+)
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+**Arguments description**:
+
+1. `path`               - *Required*, indicates a directory which contains files with macros.
+                          Only files with `sas` extension are used.
+
+* `cmplib=`             - *Optional*, the default value is `work.generateMacros`. 
+                          Names the dataset which will contain generated functions. 
+
+* `source2=`            - *Optional*, the default value is null. 
+                          Indicate if `%includ`-ed files are printed out.
+                          Any value other than null enables printing.
+
+* `outpath=`            - *Optional*, the default value is set the same as the `path`.
+                          Points a directory in which a result (a zip file) is generated.
+
+* `encodingRestricted=` - *Optional*, the default value is `0`.
+                          If set to 1 then if User session encoding is different from 
+                          encoding of the session which generates the dataset then 
+                          the generateMacros() function will not execute macro code.
+
+* `secret=`             - *Optional*, the default value is null, in such case the 
+                          secret is generated from the `sha256(datetime(), hex32.)` function 
+                          and is printed in the log. When not null then should be
+                          alphanumerical constant. Non-alphanumerical characters are removed.
+                          Required to execute the `resolve()` function. 
+                          User who do not know the value will not be able
+                          to run the `_maxro_XX_()` function.
+
+* `lineEnd=`            - *Optional*, the default value is `0D0A`, indicates which of:
+                          line feed, carriage return, or both, or a space be inserted 
+                          at the end of line in the intermediate code file that is generated.
+                          Value has to be hexadecimal code (_NOT_ null),
+                          since the value is resolved as `"&lineEnd."x`, so use e.g.
+                          `0A` for line feed, `0D` for carriage return, 
+                          `0D0A` for both, and `20` for space.
+
+* `encrypt=`            - *Optional*, the default value is `ENCRYPT`. 
+                          Indicate if `FCMP` functions generated by the package 
+                          are encrypted. Value has to be either empty or `ENCRYPT`,
+                          all other are converted to default. The option is 
+                          dedicated for debugging, keep the default value 
+                          for production use.
+
+* `trim=`               - *Deprecated*, the default value is `0`.
+                          *Kept for backward compatibility.*
+
+---
+
+### Example: ###################################################################
+
+Example 1. Prepare 2 files: `f1.sas` and `f2.sas` and use the `%GSM()` macro.
+
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~sas
+%let path = %sysfunc(pathname(work))/path2files;
+
+%put &=path.;
+options dlcreatedir;
+libname path "&path.";
+filename path "&path.";
+
+data _null_;
+  file path(f1.sas);
+  input;
+  put _infile_;
+cards4;
+%macro abc(x) / SECURE;
+  data test;
+    do i = 1 to &x.;
+      put i=;
+    end;
+  run;
+%mend;
+;;;;
+run;
+
+data _null_;
+  file path(f2.sas);
+  input;
+  put _infile_;
+cards4;
+%macro xyz(x) / SECURE;
+  %do i = 1 %to &x.;
+    %put &=i;
+  %end;
+%mend;
+;;;;
+run;
+
+%GSM(&path., cmplib=work.myMacros)
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+## >>> `%GSMpck_makeFCMPcode()` macro: <<< <a name="GSMpck-makeFCMPcode-macro"></a> #######################
+
+The `%GSMpck_makeFCMPcode()` macro is an internal macro of 
+the **GSM** (a.k.a. *Generate Secure Macros*) package. 
+
+It executes a process of converting 
+a macro provided by the user into
+a Proc FCMP function. 
+
+Since encrypted code is stored in a SAS dataset it has
+no limitation in sharing between operating systems (like catalogs have).
+
+*Limitation:* Single macro file cannot be longer than 32760 bytes.
+
+### SYNTAX: ###################################################################
+
+The basic syntax is the following, the `<...>` means optional parameters:
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~sas
+%GSMpck_makeFCMPcode( 
+   path
+  ,number
+ <,outlib=work.generateMacros.secure>
+ <,source2=>
+ <,fileNameCode=FNC>
+ <,secret=123456789>
+ <,lineEnd=0A>
+)
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+**Arguments description**:
+
+1. `path`         - *Required*, indicates a directory which contains files with macros.
+                    Only files with `sas` extension are used.
+
+2. `number`       - *Required*, a sequential number.
+
+
+* `cmplib=`       - *Optional*, the default value is `work.generateMacros`. 
+                    Names the dataset which will contain generated functions. 
+
+* `source2=`      - *Optional*, the default value is null. 
+                    Indicate if `%includ`-ed files are printed out.
+                    Any value other than null enables printing.
+
+* `fileNameCode=` - *Optional*, the default value is `FNC`.
+                    Internal fileref.
+
+* `secret=`       - *Optional*, internal, the default value is `1234567890`.
+                    Alphanumerical constant required to execute the `resolve()`
+                    function. User who do not know the value will not be able
+                    to run the `_maxro_XX_()` function.
+
+* `lineEnd=`      - *Optional*, the default value is `0D0A`, indicates which of:
+                    line feed, carriage return, or both, or a space be inserted 
+                    at the end of line in the intermediate code file that is generated.
+                    Value has to be hexadecimal code (_NOT_ null),
+                    since the value is resolved as `"&lineEnd."x`, so use e.g.
+                    `0A` for line feed, `0D` for carriage return, 
+                    `0D0A` for both, and `20` for space.
+
+* `trim=`          - *Deprecated*, the default value is `0`.
+                     *Kept for backward compatibility.*
+
+---
+
+
+## License ####################################################################
+
+Copyright (c) Bartosz Jablonski, since 2021
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+
+---
diff --git a/hist/0.22.0/gsm.zip b/hist/0.22.0/gsm.zip