Bartosz Wójcik

Posted on Jan 3, 2021 • Edited on Jan 27, 2021

String & file encryption for Python developers

#python #security #showdev #encryption

StringEncrypt — String & File Encryption for Python Developers

StringEncrypt allows you to encrypt strings and files using
a randomly generated algorithm, generating a unique decryption code
(so-called polymorphic code) each time in the selected programming language.

https://www.stringencrypt.com

Plain text Python string

cute_wabbit = "A little girl goes into a pet show and asks for a wabbit... http..."

Encrypted string in Python source code format

# encrypted with https://www.stringencrypt.com (v1.3.0) [Python]
# cute_wabbit = "A little girl goes into a pet show and asks for a wabbit... http..."
cute_wabbit = [ 0x1005, 0x4004, 0x4005, 0x5006, 0x4003, 0x0004, 0x4002, 0x9001,
                0x0009, 0x300E, 0x100F, 0xE00F, 0xC00A, 0x400D, 0xF00C, 0x300B,
                0x5013, 0x7013, 0x8015, 0x5012, 0xE018, 0x0018, 0x7016, 0xC011,
                0x1019, 0x401E, 0x801C, 0x901C, 0x401D, 0x4019, 0xB01F, 0x401F,
                0xF02F, 0x302F, 0x8029, 0xD02E, 0xE02C, 0x002B, 0x802E, 0xD029,
                0x3026, 0xF026, 0xB028, 0xC024, 0x6022, 0xB021, 0xA023, 0xC027,
                0x103B, 0x4040, 0xF03A, 0xD03A, 0x2040, 0x603F, 0x103E, 0x803E,
                0xE035, 0xA036, 0x6037, 0xC038, 0x8036, 0x0036, 0xC037, 0xC038,
                0x3058, 0xE053, 0x7051, 0x3052, 0x7053, 0x3054, 0xF051, 0x2055,
                0x005E, 0xD05D, 0xC060, 0x4060, 0xF05A, 0xA059, 0x6060, 0x305B,
                0x2044, 0x3044, 0x7045, 0x8042, 0xF048, 0x7047, 0x7042, 0x4045,
                0x504A, 0x904A, 0x704B, 0xE04B, 0xF04A, 0x7049, 0xB050, 0x9050,
                0x4080, 0x1080, 0x5079, 0xB07D, 0x107C, 0x607B, 0xA07A, 0x5079,
                0x4076 ]

for wEzdt in range(105):
  zWqET = cute_wabbit[wEzdt]
  zWqET -= 1
  zWqET ^= wEzdt
  zWqET = (((zWqET & 0xFFFF) >> 14) | (zWqET << 2)) & 0xFFFF
  zWqET ^= wEzdt
  zWqET = (((zWqET & 0xFFFF) >> 14) | (zWqET << 2)) & 0xFFFF
  cute_wabbit[wEzdt] = zWqET

cute_wabbit = ''.join(chr(zWqET & 0xFFFF) for zWqET in cute_wabbit)

del wEzdt, zWqET

print(cute_wabbit)

The problem with plain text strings

I'm a developer, and I love programming. I'm also an avid reverse engineer. I perform a wide array of software analysis in my daily work and sometimes I find things in compiled applications that shouldn't be exposed to the
first person with a simple hex-editor in hand.

What can be found in application binaries?

Everything! I've listed a few examples of the things I found below.
Sometimes these things shouldn't even be included in applications
at all (they are there due to poor design choices or rushed work),
but some are just cannot be avoided.

Database passwords
FTP passwords
Login credentials
Encryption & decryption keys
Custom code scripts in readable text
Complex SQL queries in plain text
Hidden website endpoints
BitCoin wallets locations
...and many more

Ask yourself, did you ever put some sensitive content in your software that you later regret?

Why should I care?

If any of these things were to fall into the wrong hands, they could be
used to compromise your software or your infrastructure.

Take for example database passwords. A competitor could use them
to view your database structure or dump all of its contents. You don't want to lose all your hard work because someone with a simple hex-editor can discover your password in plain text.

The solution — String Encrypt

I've decided to create a simple service called String Encrypt for developers, offering fast string & file encryption without the need to write custom encryption tools over and over again because I did that many times.

String Encrypt can help you hide the things that shouldn't be visible at first glance to anyone with a hex-editor.

Say hello to polymorphic encryption!

Forget about simple xor encryption! StringEncrypt comes with a unique encryption engine.

It's a polymorphic encryption engine, similar to the encryption methods used by the software protection solutions and advanced computer viruses.

How it works?

Let me explain how the polymorphic encryption process works.

A random set of encryption commands is selected (xor, addition, subtraction, bit rotations, bit shifts, logical negation etc.).
A random set of helper encryption keys is generated.
Every byte of the input string is encrypted with every encryption command in the random set.
The decryption code in the selected programming language is generated with a reverse set of encryption commands.

More about polymorphic engines:

How to build a polymorphic engine in C++ - https://www.pelock.com/articles/polymorphic-encryption-algorithms
Polymorphic engine in 32-bit MASM assembler - https://github.com/PELock/Simple-Polymorphic-Engine-SPE32
Poly Polymorphic Engine - https://www.pelock.com/products/poly-polymorphic-engine

What does it mean?

The encrypted content is different every time you apply StringEncrypt encryption to it.

The algorithm is always unique, the encryption keys are always randomly selected and the decryption code is also unique for every time you use our encryption.

StringEncrypt features

Out of box support for UNICODE (WideChar type in C/C++ languages), UTF-8 (multibyte) & ANSI (single byte) strings encodings
Configurable minimum & maximum number of encryption commands
Different ways to store the encrypted string (as a global or local variable if the selected programming language supports it)
Wide array of supported programming languages
You can automate the encryption process in your builds using our WebAPI interface (PHP and Python bindings)

Available editions

StringEncrypt can be used:

Directly on its website - https://www.stringencrypt.com/
You can download standalone Windows client - https://www.stringencrypt.com/download/
You can use it via WebAPI interface (from PHP and Python) - https://www.stringencrypt.com/api/
Visual Studio Code extension - https://marketplace.visualstudio.com/items?itemName=PELock.stringencrypt

How to use StringEncrypt from Python 3 code?

The preferred way of StringEncrypt module installation is via pip.

Run:

pip install stringencrypt

python3 -m pip install stringencrypt

And then add this import to your source code:

from stringencrypt import StringEncrypt

The installation package is available at https://pypi.org/project/stringencrypt/

Its source code is available at GitHub:

PELock / StringEncrypt-Python

StringEncrypt allows you to encrypt strings and files using a randomly generated algorithm, generating a unique decryption code (so-called polymorphic code) each time in the selected programming language.

StringEncrypt — String & File Encryption for Python Developers

StringEncrypt allows you to encrypt strings and files using a randomly generated algorithm, generating a unique decryption code (so-called polymorphic code) each time in the selected programming language.

https://www.stringencrypt.com

Plain text Python string

cute_wabbit = "A little girl goes into a pet show and asks for a wabbit... http..."

Encrypted string in Python source code format

# encrypted with https://www.stringencrypt.com (v1.3.0) [Python]
# cute_wabbit = "A little girl goes into a pet show and asks for a wabbit... http..."
cute_wabbit = [ 0x1005, 0x4004, 0x4005, 0x5006, 0x4003, 0x0004, 0x4002, 0x9001
                0x0009, 0x300E, 0x100F, 0xE00F, 0xC00A, 0x400D, 0xF00C, 0x300B,
                0x5013, 0x7013, 0x8015, 0x5012, 0xE018, 0x0018, 0x7016, 0xC011,
                0x1019, 0x401E, 0x801C, 0x901C, 0x401D,

…

View on GitHub

Basic string encryption usage example (with default options)

#!/usr/bin/env python

###############################################################################
#
# String Encrypt WebApi interface usage example.
#
# In this example we will encrypt sample string with default options.
#
# Version        : v1.0
# Language       : Python
# Author         : Bartosz Wójcik
# Project page   : https://www.stringencrypt.com
# Web page       : https://www.pelock.com
#
###############################################################################

#
# include StringEncrypt module
#
from stringencrypt import StringEncrypt

#
# if you don't want to use Python module, you can import it directly from the file
#
#from stringencrypt.stringencrypt import StringEncrypt

#
# create StringEncrypt class instance (we are using our activation code)
#
myStringEncrypt = StringEncrypt("ABCD-ABCD-ABCD-ABCD")

#
# encrypt a string using all the default options
#
result = myStringEncrypt.encrypt_string("Hello, world!", "label_encrypted")

#
# result[] array holds the encryption results as well as other information
#
# result["error"] (int) - error code
# result["error_string"] (string) - error code as a string
# result["source"] (string) - decryptor source code
# result["expired"] (boolean) - expiration flag
# result["credits_left"] (int) - number of credits left
# result["credits_total"] (int) - initial number of credits

if result and "error" in result:

    # display source code of the decryption code
    if result["error"] == StringEncrypt.ErrorCodes.ERROR_SUCCESS:
        print(result["source"])
    else:
        print(f'An error occurred, error code: {result["error"]} ({result["error_string"]})')

else:
    print("Something unexpected happen while trying to encrypt the string.")

Return values:

*

result["error"] (int)

error code * result["source"] (string)
decryptor source code * result["expired"] (boolean)
expiration flag * result["credits_left"] (int)
number of credits left * result["credits_total"] (int)
initial number of credits

Error codes:

*

ERROR_SUCCESS (0)

everything went fine * ERROR_EMPTY_LABEL (1)
label parameter is empty * ERROR_LENGTH_LABEL (2)
label length is too long * ERROR_EMPTY_STRING (3)
input string is empty * ERROR_EMPTY_BYTES (4)
input file bytes array is empty * ERROR_EMPTY_INPUT (5)
input source (either string or file) is missing * ERROR_LENGTH_STRING (6)
string or bytes length is too long * ERROR_INVALID_LANG (7)
programming language not supported * ERROR_INVALID_LOCALE (8)
language locale is not supported * ERROR_CMD_MIN (9)
invalid number of minimum encryption commands * ERROR_CMD_MAX (10)
invalid number of maximum encryption commands * ERROR_DEMO (100)
you need a valid code to use full version features

Custom string encryption for other programming languages

#!/usr/bin/env python

###############################################################################
#
# String Encrypt WebApi interface usage example.
#
# In this example we will encrypt sample strings with custom options.
#
# Version        : v1.0
# Language       : Python
# Author         : Bartosz Wójcik
# Project page   : https://www.stringencrypt.com
# Web page       : https://www.pelock.com
#
###############################################################################

#
# include StringEncrypt module
#
from stringencrypt import StringEncrypt

#
# if you don't want to use Python module, you can import it directly from the file
#
#from stringencrypt.stringencrypt import StringEncrypt


def print_results(result):

    #
    # result[] array holds the encryption results as well as other information
    #
    # result["error"] (int) - error code
    # result["error_string"] (string) - error code as a string
    # result["source"] (string) - decryptor source code
    # result["expired"] (boolean) - expiration flag
    # result["credits_left"] (int) - number of credits left
    # result["credits_total"] (int) - initial number of credits

    if result and "error" in result:

        # display source code of the decryption code
        if result["error"] == StringEncrypt.ErrorCodes.ERROR_SUCCESS:
            print(result["source"])
        else:
            print(f'An error occurred, error code: {result["error"]} ({result["error_string"]})')

    else:
        print("Something unexpected happen while trying to encrypt the string.")


#
# create StringEncrypt class instance (we are using our activation code)
#
myStringEncrypt = StringEncrypt("ABCD-ABCD-ABCD-ABCD")

#
# encrypt a string using all the default options
#
result = myStringEncrypt.encrypt_string("Hello", "label")
print_results(result)

#
# lets change the output programming language into C++
#
myStringEncrypt.outputProgrammingLanguage = StringEncrypt.OutputProgrammingLanguages.LANG_CPP

result = myStringEncrypt.encrypt_string("C++", "wszLbl")
print_results(result)

#
# change the encoding of the string to ANSI
#
myStringEncrypt.useUnicode = False

result = myStringEncrypt.encrypt_string("ANSI!", "szLbl")
print_results(result)

#
# change to JavaScript language output and see the difference
# between local variable encoding and global variable encoding
#
myStringEncrypt.useUnicode = True
myStringEncrypt.outputProgrammingLanguage = StringEncrypt.OutputProgrammingLanguages.LANG_JS
myStringEncrypt.declareAsLocalVariable = True

result = myStringEncrypt.encrypt_string("Local", "local")
print_results(result)

#
# switch to global variable encoding (if possible for the programming language)
#
myStringEncrypt.declareAsLocalVariable = False

result = myStringEncrypt.encrypt_string("Global", "global")
print_results(result)

Return values:

*

result["error"] (int)

error code * result["source"] (string)
decryptor source code * result["expired"] (boolean)
expiration flag * result["credits_left"] (int)
number of credits left * result["credits_total"] (int)
initial number of credits

Error codes:

*

ERROR_SUCCESS (0)

everything went fine * ERROR_EMPTY_LABEL (1)
label parameter is empty * ERROR_LENGTH_LABEL (2)
label length is too long * ERROR_EMPTY_STRING (3)
input string is empty * ERROR_EMPTY_BYTES (4)
input file bytes array is empty * ERROR_EMPTY_INPUT (5)
input source (either string or file) is missing * ERROR_LENGTH_STRING (6)
string or bytes length is too long * ERROR_INVALID_LANG (7)
programming language not supported * ERROR_INVALID_LOCALE (8)
language locale is not supported * ERROR_CMD_MIN (9)
invalid number of minimum encryption commands * ERROR_CMD_MAX (10)
invalid number of maximum encryption commands * ERROR_DEMO (100)
you need a valid code to use full version features

Check the status of the activation code and show current limitations

This example shows how to get information about the current activation code and its features.

#!/usr/bin/env python

###############################################################################
#
# StringEncrypt WebApi interface usage example.
#
# In this example we will verify our activation code status.
#
# Version        : v1.0
# Language       : Python
# Author         : Bartosz Wójcik
# Project page   : https://www.stringencrypt.com
# Web page       : https://www.pelock.com
#
###############################################################################

#
# include StringEncrypt module
#
from stringencrypt import StringEncrypt

#
# if you don't want to use Python module, you can import it directly from the file
#
#from stringencrypt.stringencrypt import StringEncrypt

#
# create StringEncrypt class instance (we are using our activation code)
#
myStringEncrypt = StringEncrypt("ABCD-ABCD-ABCD-ABCD")

#
# login to the service
#
result = myStringEncrypt.is_demo()

#
# result[] array holds the information about the license
#
# result["demo"] (boolean) - demo mode flag
# result["label_limit"] (int) - label limit length
# result["string_limit"] (int) - string limit length
# result["bytes_limit"] (int) - bytes/file limit length
# result["credits_left"] (int) - number of credits left
# result["credits_total"] (int) - initial number of credits
# result["cmd_min"] (int) - minimum number of encryption commands
# result["cmd_max"] (int) - maximum number of encryption commands
#
if result:

   print(f'Demo version status - {"True" if result["demo"] else "False"}')

   print(f'Label length limit - {result["label_limit"]}')
   print(f'String length limit - {result["string_limit"]}')

   print(f'File bytes limit - {result["bytes_limit"]}')

   print(f'Usage credits left - {result["credits_left"]}')
   print(f'Total usage credits - {result["credits_total"]}')

   print(f'Min. number of encryption commands - {result["cmd_min"]}')
   print(f'Max. number of encryption commands - {result["cmd_max"]}')

else:
   print("Something unexpected happen while trying to login to the service.")

Return values:

*

$result["demo"] (boolean)

demo mode flag * $result["label_limit"] (int)
label limit length * $result["string_limit"] (int)
string/file limit length * $result["credits_left"] (int)
number of credits left * $result["credits_total"] (int)
initial number of credits * $result["cmd_min"] (int)
minimum number of encryption commands * $result["cmd_max"] (int)
maximum number of encryption commands

Error codes

none

Supported programming languages

StringEncrypt engine supports code generation for the following programming languages:

Some examples of generated source code for supported programming languages:

C/C++ encryption (UNICODE example)

// encrypted with https://www.stringencrypt.com (v1.3.0) [C/C++]
// wszLabel = "C/C++ String Encryption"
wchar_t wszLabel[24] = { 0x5ADA, 0x6C21, 0x5A24, 0x6DEF, 0x6DFE, 0x74C5, 0x5240, 0x428B,
                         0x4382, 0x4F69, 0x4CDC, 0x4827, 0x73A6, 0x598D, 0x4CF8, 0x4A43,
                         0x40AA, 0x3FB1, 0x4D34, 0x42DF, 0x474E, 0x42D5, 0x4C50, 0x8514 };

for (unsigned int JTIif = 0, ktTcs = 0; JTIif < 24; JTIif++)
{
        ktTcs = wszLabel[JTIif];
        ktTcs ^= JTIif;
        ktTcs ++;
        ktTcs += JTIif;
        ktTcs ^= JTIif;
        ktTcs = (((ktTcs & 0xFFFF) >> 3) | (ktTcs << 13)) & 0xFFFF;
        ktTcs = ~ktTcs;
        ktTcs += JTIif;
        ktTcs = (((ktTcs & 0xFFFF) >> 1) | (ktTcs << 15)) & 0xFFFF;
        ktTcs = ~ktTcs;
        ktTcs += JTIif;
        ktTcs ^= 0xB7B5;
        ktTcs += JTIif;
        ktTcs ^= JTIif;
        ktTcs -= JTIif;
        ktTcs = ((ktTcs << 13) | ( (ktTcs & 0xFFFF) >> 3)) & 0xFFFF;
        wszLabel[JTIif] = ktTcs;
}

wprintf(wszLabel);

C# Sharp encryption (UNICODE example)

// encrypted with https://www.stringencrypt.com (v1.3.0) [C#]
// superSecretString = "Easy encryption in C#"
String superSecretString = "\u6B56\uA14A\u834B\u954C\uD95A\uB14E\u814F\u595D" +
                           "\u9551\u8152\u9553\uBF54\u5B62\u9556\u9157\u2F65" +
                           "\u5366\u9F5A\uC568\u0169\uFF6A";

for (int XBasD = 0, Dbzej = 0; XBasD < 21; XBasD++)
{
        Dbzej = superSecretString[XBasD];
        Dbzej -= XBasD;
        Dbzej = ((Dbzej << 8) | ( (Dbzej & 0xFFFF) >> 8)) & 0xFFFF;
        Dbzej ^= 0xF9A1;
        Dbzej = (((Dbzej & 0xFFFF) >> 1) | (Dbzej << 15)) & 0xFFFF;
        Dbzej -= 0xA3CC;
        Dbzej ^= XBasD;
        Dbzej += 0x4C2C;
        superSecretString = superSecretString.Substring(0, XBasD) + (char)(Dbzej & 0xFFFF) + superSecretString.Substring(XBasD + 1);
}

MessageBox.Show(superSecretString);

Visual Basic .NET aka VB.NET encryption (UNICODE EXAMPLE)

' encrypted with https://www.stringencrypt.com (v1.3.0) [Visual Basic .NET]
' EncryptedString = "Visual Basic .NET string encryption"
Dim epTlz() As Integer = { &H8ED9, &H3BD9, &HF1D8, &HAFD8, &H63D8, &H38D8, &H44D8, &HC2D7,
                           &H85D7, &H33D7, &HFDD6, &HA3D6, &HC4D6, &H76D6, &H16D6, &HC1D5,
                           &H90D5, &H84D5, &HF1D4, &HB0D4, &H76D4, &H3FD4, &HFAD3, &HBDD3,
                           &HC4D3, &H21D3, &HFAD2, &HC7D2, &H76D2, &H2DD2, &HF4D1, &HB0D1,
                           &H63D1, &H35D1, &HF6D0 }
Dim EncryptedString As String
Dim BePuQ As Integer

Dim blvjn As Integer
For blvjn = 0 To 34
  BePuQ = epTlz(blvjn)
  BePuQ -= 1
  BePuQ = (((BePuQ And &HFFFF) >> 13) Or (BePuQ << 3)) And &HFFFF
  BePuQ += blvjn
  BePuQ -= &HF74C
  BePuQ += blvjn
  BePuQ -= &H2E7B
  BePuQ = (((BePuQ And &HFFFF) >> 8) Or (BePuQ << 8)) And &HFFFF
  BePuQ = Not BePuQ
  BePuQ = BePuQ Xor blvjn
  BePuQ += 1
  BePuQ += blvjn
  BePuQ = ((BePuQ << 13) Or ( (BePuQ And &HFFFF) >> 3)) And &HFFFF
  EncryptedString = EncryptedString + ChrW(BePuQ And &HFFFF)
Next blvjn

MessageBox.Show(EncryptedString)

Delphi & Pascal encryption (UNICODE example)

// encrypted with https://www.stringencrypt.com (v1.3.0) [Delphi / Pascal]
var
  // mySecret = "Delphi is awesome!"
  mySecret: array[0..19] of WideChar;
  EPmwd: Integer;
  ZHnps: Integer;

begin

  mySecret[16] := WideChar($C22E); mySecret[5] := WideChar($C1FA);
  mySecret[7] := WideChar($C206); mySecret[8] := WideChar($C208);
  mySecret[10] := WideChar($C1FA); mySecret[4] := WideChar($C1FB);
  mySecret[9] := WideChar($C1AD); mySecret[17] := WideChar($C1EA);
  mySecret[2] := WideChar($C1FB); mySecret[11] := WideChar($C1BC);
  mySecret[3] := WideChar($C1FD); mySecret[6] := WideChar($C1BF);
  mySecret[15] := WideChar($C202); mySecret[0] := WideChar($C18F);
  mySecret[1] := WideChar($C1EE); mySecret[12] := WideChar($C206);
  mySecret[18] := WideChar($C28F); mySecret[14] := WideChar($C200);
  mySecret[13] := WideChar($C1B8);

  for ZHnps := 0 to 19 do
  begin
    EPmwd := Ord(mySecret[ZHnps]);
    EPmwd := EPmwd - ZHnps;
    EPmwd := EPmwd - $01BE;
    EPmwd := not EPmwd;
    EPmwd := EPmwd + $2D7A;
    EPmwd := EPmwd - ZHnps;
    EPmwd := EPmwd xor ZHnps;
    EPmwd := EPmwd + $004B;
    EPmwd := EPmwd xor ZHnps;
    EPmwd := EPmwd + ZHnps;
    Inc(EPmwd);
    EPmwd := EPmwd xor $EB5C;
    EPmwd := EPmwd + $799C;
    EPmwd := EPmwd xor ZHnps;
    mySecret[ZHnps] := WideChar(EPmwd);
  end;

  ShowMessage(mySecret);

Java encryption (UNICODE example)

// encrypted with https://www.stringencrypt.com (v1.3.0) [Java]
// myJavaPassword = "Very secret password! QWERTY"
String myJavaPassword = "";

int JbeMY[] = { 0x0434, 0x842C, 0x0426, 0x8422, 0x03CD, 0x8423, 0x842C, 0x842B,
                0x0416, 0x843C, 0x0413, 0x03DD, 0x0415, 0x843E, 0x8413, 0x8413,
                0x8421, 0x8425, 0x0426, 0x040B, 0x83AE, 0x03AD, 0x8436, 0x8431,
                0x83CC, 0x0406, 0x0403, 0x8402 };

for (int zuLRG = 0, tnYzy = 0; zuLRG < 28; zuLRG++)
{
        tnYzy = JbeMY[zuLRG];
        tnYzy --;
        tnYzy ^= zuLRG;
        tnYzy += 0x99C8;
        tnYzy ^= zuLRG;
        tnYzy ^= 0x95C1;
        tnYzy = (((tnYzy & 0xFFFF) >> 15) | (tnYzy << 1)) & 0xFFFF;
        tnYzy --;
        tnYzy ^= 0xFFFF;
        tnYzy += 0x10CA;
        myJavaPassword = myJavaPassword + (char)(tnYzy & 0xFFFF);
}

System.out.println(myJavaPassword);

JavaScript encryption (ANSI)

<script type="text/javascript">
// encrypted with https://www.stringencrypt.com (v1.3.0) [JavaScript]
// hiddenJavaScriptString = "How to encrypt string in JavaScript? That\'s how!"
var hiddenJavaScriptString = "\x8C\xB4\x4E\x5B\x4A\xD4\x07\xBC\xB4\xC4\x52\x7E\x1A\x72\xE7\xB6" +
                             "\xDA\xDA\x88\x67\xF8\x5C\x67\x49\x50\xB9\x47\xFA\x1D\xED\x2D\x39" +
                             "\x8D\x21\x57\x66\xA0\xB1\xA9\x8D\x5F\xF0\x53\x9C\x7A\x1E\xC3\xF0";

for (var oBFEi = 0, hFSrA = 0; oBFEi < 48; oBFEi++)
{
        hFSrA = hiddenJavaScriptString.charCodeAt(oBFEi);
        hFSrA = ((hFSrA << 1) | ( (hFSrA & 0xFF) >> 7)) & 0xFF;
        hFSrA += 0x9E;
        hFSrA = ((hFSrA << 6) | ( (hFSrA & 0xFF) >> 2)) & 0xFF;
        hFSrA ^= oBFEi;
        hFSrA -= oBFEi;
        hFSrA ^= 0xFF;
        hFSrA = (((hFSrA & 0xFF) >> 6) | (hFSrA << 2)) & 0xFF;
        hFSrA ^= 0xC3;
        hFSrA = ((hFSrA << 4) | ( (hFSrA & 0xFF) >> 4)) & 0xFF;
        hFSrA += 0xD1;
        hFSrA -= oBFEi;
        hFSrA += 0x0B;
        hFSrA ^= 0xD8;
        hFSrA = (((hFSrA & 0xFF) >> 7) | (hFSrA << 1)) & 0xFF;
        hFSrA += 0xB0;
        hiddenJavaScriptString = hiddenJavaScriptString.substr(0, oBFEi) + String.fromCharCode(hFSrA & 0xFF) + hiddenJavaScriptString.substr(oBFEi + 1);
}

alert(hiddenJavaScriptString);
</script>

Ruby encryption (UNICODE example)


# encrypted with https://www.stringencrypt.com (v1.3.0) [Ruby]
# ruby = "Ruby on rails"
ruby = "\u68EA\u60A2\u78C6\u7096\u4946\u40A6\u58A6\u5140\u287A\u209A\u38C8\u30C0\u0870"

ruby.codepoints.each_with_index do |komgu, rydut|
  komgu = ((komgu << 5) | ( (komgu & 0xFFFF) >> 11)) & 0xFFFF
  komgu ^= rydut
  komgu = (((komgu & 0xFFFF) >> 6) | (komgu << 10)) & 0xFFFF
  komgu += rydut
  komgu -= 0x34D0
  komgu ^= rydut
  komgu = ((komgu << 13) | ( (komgu & 0xFFFF) >> 3)) & 0xFFFF
  komgu = ~komgu
  komgu -= 1
  komgu = ((komgu << 3) | ( (komgu & 0xFFFF) >> 13)) & 0xFFFF
  komgu ^= rydut
  ruby[rydut] = [komgu & 0xFFFF].pack('U').force_encoding('UTF-8')
end

puts ruby

```AutoIt encryption (UNICODE example)


autoit
; encrypted with https://www.stringencrypt.com (v1.3.0) [AutoIt]
#include <Array.au3>

; $autoit_obfuscator = "We got it too https://www.pelock.com/products/autoit-obfuscator"
Global $autoit_obfuscator[64] = [ 0xD440, 0xCD01, 0xEF42, 0xCC83, 0xC944, 0xC485, 0xEE46, 0xCA87, _
                                  0xC7C8, 0xED89, 0xC74A, 0xCA8B, 0xCB4C, 0xEC8D, 0xC84E, 0xC60F, _
                                  0xC1D0, 0xC391, 0xC2D2, 0xE613, 0xED54, 0xED15, 0xC1D6, 0xC197, _
                                  0xC258, 0xEE99, 0xC15A, 0xCB9B, 0xCEDC, 0xCF1D, 0xC9DE, 0xCD9F, _
                                  0xE0E0, 0xC621, 0xC0E2, 0xC1A3, 0xE164, 0xCEA5, 0xCF66, 0xC1A7, _
                                  0xC7E8, 0xCF29, 0xC4EA, 0xCF2B, 0xCD6C, 0xE32D, 0xC4EE, 0xCEAF, _
                                  0xC9F0, 0xC431, 0xC7F2, 0xC933, 0xE474, 0xC535, 0xC376, 0xC137, _
                                  0xCB78, 0xC839, 0xC0FA, 0xC1BB, 0xCAFC, 0xC73D, 0xC97E, 0xF03F ]

For $PxWtE = 0 to 63
    $eUOPa = $autoit_obfuscator[$PxWtE]
    $eUOPa = BitXOR($eUOPa, $PxWtE)
    $eUOPa = $eUOPa - 1
    $eUOPa = BitRotate($eUOPa, 10, "W")
    $eUOPa = $eUOPa + 1
    $eUOPa = BitXOR($eUOPa, $PxWtE)
    $eUOPa = BitNOT($eUOPa)
    $eUOPa = BitRotate($eUOPa, 15, "W")
    $autoit_obfuscator[$PxWtE] = ChrW(BitAND($eUOPa, 0xFFFF))
Next

$autoit_obfuscator = _ArrayToString($autoit_obfuscator, "")

ConsoleWrite($autoit_obfuscator)

PowerShell encryption (UNICODE example)


powershell
# encrypted with https://www.stringencrypt.com (v1.3.0) [PowerShell]
# $Label = "Well, it has some interesting syntax!"
[uint16[]] $pYeOS = 0x5654, 0x5651, 0x1650, 0x9650, 0x1661, 0x9664, 0xD652, 0x9650,
                    0x1666, 0x9654, 0xD656, 0xD652, 0x1668, 0xD653, 0x5655, 0x5656,
                    0xD658, 0x966A, 0xD658, 0x1658, 0x1657, 0x565B, 0x9658, 0x565C,
                    0x5659, 0x9659, 0xD65C, 0x165C, 0x565E, 0x9670, 0x565C, 0x565B,
                    0x965E, 0x965D, 0xD662, 0x965D, 0xD673
[string] $Label = ""

for ($TPYSL = 0; $TPYSL -lt 37; $TPYSL++)
{
  $kqSuK = $pYeOS[$TPYSL]
  $kqSuK = -bnot $kqSuK
  $kqSuK = (($kqSuK -shl 7) -bor ( ($kqSuK -band 0xFFFF) -shr 9)) -band 0xFFFF
  $kqSuK += 1
  $kqSuK = ((($kqSuK -band 0xFFFF) -shr 5) -bor ($kqSuK -shl 11)) -band 0xFFFF
  $kqSuK += $TPYSL
  $kqSuK -= 1
  $kqSuK += $TPYSL
  $kqSuK -= 0xAE56
  $Label += [char]($kqSuK -band 0xFFFF)
}

Write-Host $Label

Haskell encryption (ANSI example)


haskell
-- encrypted with https://www.stringencrypt.com (v1.3.0) [Haskell]
module Main where

import qualified Data.Char
import qualified Data.Bits

main = do
  putStrLn $ gimmeh

-- gimmeh = "Monads! I need more Monads!"
gimmeh = zipWith f [0..] [ 0x40, 0x7F, 0x61, 0x53, 0x6D, 0x67, 0x96, 0x96,
                           0x4C, 0x98, 0x69, 0x47, 0x44, 0x40, 0x9F, 0x4B,
                           0x4E, 0x6E, 0xBE, 0x82, 0x94, 0xB3, 0xB5, 0x47,
                           0xB1, 0xA3, 0x8A ]
  where
    f vpkqq ujzsd = let wcufe0 = ujzsd
                        wcufe1 = wcufe0 `Data.Bits.xor` 0xB0
                        wcufe2 = Data.Bits.complement wcufe1
                        wcufe3 = wcufe2 - 0xD0
                        wcufe4 = Data.Bits.complement wcufe3
                        wcufe5 = wcufe4 - 0x0E
                        wcufe6 = wcufe5 - vpkqq
                        wcufe7 = wcufe6 `Data.Bits.xor` vpkqq
                        wcufe8 = wcufe7 - vpkqq
                        wcufe9 = Data.Bits.complement wcufe8
                    in Data.Char.chr (wcufe9 Data.Bits..&. 0xFF)

MASM Assembler 32 bit encryption (UNICODE example)


asm
; encrypted with https://www.stringencrypt.com (v1.3.0) [MASM Assembler (32 bit)]

.data

        ; szMyGoodOldFriend = "I will be always here :)"
        szMyGoodOldFriend       dw 0BD37h, 0BD4Bh, 0BD63h, 0BD14h, 0BD0Ch, 0BD13h, 0BD4Eh, 0BD17h
                                dw 0BD13h, 0BD53h, 0BD15h, 0BD55h, 0BCE9h, 0BD5Ah, 0BCF1h, 0BCE2h
                                dw 0BC94h, 0BD63h, 0BD59h, 0BCB3h, 0BD5Fh, 0BC9Fh, 0BCF8h, 0BCA8h
                                dw 0BD3Ch

.code
        mov     ecx, offset szMyGoodOldFriend
        mov     edx, 25
        and     eax, 0

@@:
        mov     bx, word ptr [ecx + eax]
        not     ebx
        sub     ebx, eax
        not     ebx
        xor     ebx, 02C59h
        sub     ebx, 0DFB5h
        add     ebx, eax
        not     ebx
        add     ebx, 061C5h
        xor     ebx, 04FBCh
        dec     ebx
        add     ebx, eax
        not     ebx
        mov     word ptr [ecx + eax], bx
        inc     eax
        dec     edx
        jne     @b

        push    0
        push    ecx
        push    ecx
        push    0
        call    MessageBoxW

FASM Assembler 32 bit (ANSI example)


asm

; encrypted with https://www.stringencrypt.com (v1.3.0) [FASM Assembler (32 bit)]

        ; szFasm = "Hi Tomek Grysztar :)"
        local   szFasm[21]:BYTE

        lea     edx, [szFasm]

        mov     byte [edx + 8], 0D6h
        mov     byte [edx + 9], 0F5h
        mov     byte [edx + 5], 09Fh
        mov     byte [edx + 0], 0EEh
        mov     byte [edx + 3], 084h
        mov     byte [edx + 2], 0E2h
        mov     byte [edx + 16], 08Ch
        mov     byte [edx + 19], 0FBh
        mov     byte [edx + 10], 0A4h
        mov     byte [edx + 7], 09Dh
        mov     byte [edx + 18], 0FCh
        mov     byte [edx + 17], 094h
        mov     byte [edx + 4], 0ADh
        mov     byte [edx + 6], 0A7h
        mov     byte [edx + 11], 0BBh
        mov     byte [edx + 12], 0A1h
        mov     byte [edx + 15], 0ABh
        mov     byte [edx + 14], 0BEh
        mov     byte [edx + 20], 0FEh
        mov     byte [edx + 13], 0AAh
        mov     byte [edx + 1], 093h

        mov     eax, 21
        sub     ebx, ebx

@@:
        mov     cl, byte [edx + ebx]
        xor     ecx, ebx
        dec     ecx
        xor     ecx, 043h
        not     ecx
        add     ecx, 015h
        xor     ecx, ebx
        add     ecx, ebx
        add     ecx, 055h
        xor     ecx, ebx
        xor     ecx, 029h
        xor     ecx, ebx
        xor     ecx, 034h
        xor     ecx, ebx
        xor     ecx, 0EFh
        dec     ecx
        mov     byte [edx + ebx], cl
        inc     ebx
        dec     eax
        jne     @b

        push    0
        push    edx
        push    edx
        push    0
        call    [MessageBoxA]

Free demo version limitations

The free demo version comes with some limitations.

Feature	Demo version	Full version
String encryption	✅	✅
File encryption (text or binary file)	❌	✅
Max. label length (characters)	`10`	`64`
Max. string length (characters)	`10`	`4096`
Max. file length (bytes)	—	`4 MB`
Min. number of encryption commands	`3`	`50`
Max. number of encryption commands	`3`	`50`

Purchase activation code

To remove the limitations and support our project and its development, you need to buy an activation code at:

https://www.stringencrypt.com/buy/

Each activation code has an assigned number of usage credits. You can use the software in full version as many times as you have usage credits on your account balance.

How to get a free activation code?

You can get a free activation code (500 usage credits) if you can advertise StringEncrypt service with a link to the project site https://www.stringencrypt.com/ at:

Programming forums
Programming blogs
Technical articles
Twitter / Facebook / other social media site
...or any other website related to programming and development

Send me all the details at my contact address and if it's legit - bam!, you got yourself a free code :)

Changelog

[1.0.0] - 2021-01-03

Initial release of a StringEncrypt Python 3 module

Fin

I hope you like it and you will try it at least :)

A free usage code for dev.to readers

D9DB-7CDD-ED1E-0EAC (use it while it lasts)

Bartosz Wójcik
https://www.pelock.com

StringEncrypt — String & File Encryption for Python Developers

Plain text Python string

Encrypted string in Python source code format

The problem with plain text strings

What can be found in application binaries?

Why should I care?

The solution — String Encrypt

Say hello to polymorphic encryption!

How it works?

What does it mean?

StringEncrypt features

Available editions

How to use StringEncrypt from Python 3 code?

PELock / StringEncrypt-Python

StringEncrypt allows you to encrypt strings and files using a randomly generated algorithm, generating a unique decryption code (so-called polymorphic code) each time in the selected programming language.

StringEncrypt — String & File Encryption for Python Developers

Plain text Python string

Encrypted string in Python source code format

Basic string encryption usage example (with default options)

Return values:

Error codes:

Custom string encryption for other programming languages

Return values:

Error codes:

Check the status of the activation code and show current limitations

Return values:

Error codes

Supported programming languages

C/C++ encryption (UNICODE example)

C# Sharp encryption (UNICODE example)

Visual Basic .NET aka VB.NET encryption (UNICODE EXAMPLE)

Delphi & Pascal encryption (UNICODE example)

Java encryption (UNICODE example)

JavaScript encryption (ANSI)

Ruby encryption (UNICODE example)

PowerShell encryption (UNICODE example)

Haskell encryption (ANSI example)

MASM Assembler 32 bit encryption (UNICODE example)

FASM Assembler 32 bit (ANSI example)

Free demo version limitations

Purchase activation code

How to get a free activation code?

Changelog

[1.0.0] - 2021-01-03

Fin

A free usage code for dev.to readers

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