Crate stegano

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§stegano

A powerful and versatile steganography tool designed to empower you with a wide range of image manipulation and data encryption capabilities.

§Quick Start

Get started with the stegano crate by following these simple steps:

Install the stegano tool using Cargo:

cargo install --locked stegano

Use these subcommands to process and manipulate png and jpeg images. Here are some examples:

Read and process 10 chunks from a png image:

$ stegano show-meta -i image_file_name -n 10
It is a valid PNG file. Let's process it!

---- Header ----
00000000 | 89 50 4E 47 0D 0A 1A 0A | .PNG....
---- End ----

---- Chunk #0 ----
Offset: 13
Size: 68
CRC: fa130394
00000013 | 00 0A 36 08 06 00 00 00 AF 77 9F 68 00 00 00 01 73 52 47 42 | ..6......w.h....sRGB
00000033 | 00 AE CE 1C E9 00 00 20 00 49 44 41 54 78 5E EC DD 75 BC 6F | .........IDATx^..u.o
00000053 | 55 9D FF F1 CF 39 B7 83 1B 70 69 91 54 50 50 46 09 51 41 C5 | U....9...pi.TPPF.QA.
00000073 | 8E F9 19 94 98 E0 08 12 | ........
------ End ------

---- Chunk #1 ----
Offset: 98
Size: 70
CRC: 80000208
00000098 | 42 74 08 09 0B C5 E2 27 17 A5 E3 22 48 DE E4 C6 39 BF C7 DA | Bt.....'..."H...9...
00000118 | DF DA B1 F6 5E B9 BF 75 5E E7 9F E1 9E EF CA E7 5E FB 7B F9 | ....^..u^.......^.{.
00000138 | F1 7B FB 59 23 97 5E 7D E3 B8 F0 13 4D 60 7C 1C CE 68 98 0C | .{.Y#.^}....M`|..h..
00000158 | 84 00 02 08 20 80 00 02 08 20 | ..........
------ End ------

---- Chunk #2 ----
Offset: 185
Size: 2
CRC: 20800002
00000185 | 02 08 | ..
------ End ------

---- Chunk #3 ----
Offset: 204
Size: 8
CRC: 460800c6
00000204 | 32 32 32 54 FB E9 F5 66 | 222T...f
------ End ------

---- Chunk #4 ----
Offset: 229
Size: 2
CRC: 20800002
00000229 | 02 08 | ..
------ End ------

---- Chunk #5 ----
Offset: 248
Size: 8
CRC: 20800002
00000248 | 00 02 08 20 80 00 02 08 | ........
------ End ------

---- Chunk #6 ----
Offset: 273
Size: 8
CRC: 20190601
00000273 | 95 00 60 24 4B C2 7F 91 | ..`$K...
------ End ------

---- Chunk #7 ----
Offset: 298
Size: 4
CRC: 40000104
00000298 | 00 01 04 10 | ....
------ End ------

---- Chunk #8 ----
Offset: 319
Size: 1
CRC: 4104000
00000319 | 01 | .
------ End ------

---- Chunk #9 ----
Offset: 337
Size: 16
CRC: 20820
00000337 | 23 E1 BF 08 88 A6 21 B8 5A D9 24 C4 E7 08 20 80 | #.....!.Z.$.....
------ End ------

Process the png image in silent mode:

$ stegano show-meta -i image_file_name -r

Read and process a jpeg image.

$ stegano show-meta -i image_file_name -t jpeg
JFIF Header: JfifHeader { version: 18758 }
SOF Header for Chunk#67: SofHeader { jpeg_obj: JpegObj { precision: 8, image_height: 243, image_width: 207, number_of_components: 3, comp_id: [1, 2, 3], hsamp_factor: [2, 1, 1], vsamp_factor: [2, 1, 1], qtable_number: [0, 1, 1], dctable_number: [1, 2, 3], actable_number: [11, 12, 13, 14], ss: 0, se: 63, ah: 0, al: 0 } }
Processing DHT Header for Chunk#68:
Processing DHT Header for Chunk#69:
Processing DHT Header for Chunk#70:
Processing DHT Header for Chunk#71:
SOS Header for Chunk#72: SosHeader { jpeg_obj: JpegObj { precision: 3, image_height: 243, image_width: 207, number_of_components: 3, comp_id: [17], hsamp_factor: [3], vsamp_factor: [15], qtable_number: [0], dctable_number: [0], actable_number: [0], ss: 0, se: 0, ah: 0, al: 0 } }

Sometimes the JFIF header doesn’t exist, but it is still a valid jpeg file:

$ stegano show-meta -i image_file_name -t jpeg
DQT Header for Chunk#1: DqtHeader { dct: DctStruct { quantum: [[8, 2054, 1542, 1543, 1798, 1541, 1288, 2055, 1799, 1799, 1801, 2313, 2312, 2058, 2572, 3092, 5133, 3340, 3083, 2827, 2828, 3097, 6418, 4627, 4879, 3860, 5149, 7450, 6687, 7966, 7709, 7450, 6684, 7196, 7200, 8228, 9262, 11815, 10016, 8226, 8748, 11299, 8988, 7196, 7208, 10295, 14121, 10540, 11312, 12337, 12596, 13364, 13364, 13343, 7975, 10041, 14653, 15672, 14386, 12860, 15406, 11827, 13108, 13362], [12801, 265, 2313, 2313, 2316, 3083, 2828, 3096, 6157, 3341, 3352, 6194, 12833, 8476, 7201, 8498, 12850, 12850, 12850, 12850, 12850, 12850, 12850, 12850, 12850, 12850, 12850, 12850, 12850, 12850, 12850, 12850, 12850, 12850, 12850, 12850, 12850, 12850, 12850, 12850, 12850, 12850, 12850, 12850, 12850, 12850, 12850, 12850, 12850, 12850, 12850, 12850, 12850, 12850, 12850, 12850, 12850, 12850, 12850, 12850, 12850, 12850, 12850, 0]] } }
SOF Header for Chunk#3: SofHeader { jpeg_obj: JpegObj { precision: 8, image_height: 460, image_width: 460, number_of_components: 3, comp_id: [1, 2, 3], hsamp_factor: [2, 1, 1], vsamp_factor: [2, 1, 1], qtable_number: [0, 1, 1], dctable_number: [1, 2, 3], actable_number: [11, 12, 13, 14], ss: 0, se: 63, ah: 0, al: 0 } }
Processing DHT Header for Chunk#4:
SOS Header for Chunk#5: SosHeader { jpeg_obj: JpegObj { precision: 3, image_height: 460, image_width: 460, number_of_components: 3, comp_id: [17], hsamp_factor: [3], vsamp_factor: [15], qtable_number: [0], dctable_number: [0], actable_number: [0], ss: 0, se: 0, ah: 0, al: 0 } }

Read chunks at different positions:

# Read 1 chunk starting from position 0
$ stegano show-meta -i image_file_name -s 0 -e 10 -n 1
It is a valid PNG file. Let's process it!

---- Header ----
00000000 | 89 50 4E 47 0D 0A 1A 0A | .PNG....
---- End ----

---- Chunk #0 ----
Offset: 13
Size: 68
CRC: fa130394
00000013 | 00 0A 36 08 06 00 00 00 AF 77 9F 68 00 00 00 01 73 52 47 42 | ..6......w.h....sRGB
00000033 | 00 AE CE 1C E9 00 00 20 00 49 44 41 54 78 5E EC DD 75 BC 6F | .........IDATx^..u.o
00000053 | 55 9D FF F1 CF 39 B7 83 1B 70 69 91 54 50 50 46 09 51 41 C5 | U....9...pi.TPPF.QA.
00000073 | 8E F9 19 94 98 E0 08 12 | ........
------ End ------

# Read 3 chunks starting from position 10000
$ stegano show-meta -i image_file_name -s 10000 -e 200000 -n 3
It is a valid PNG file. Let's process it!

---- Header ----
00000000 | 89 50 4E 47 0D 0A 1A 0A | .PNG....
---- End ----

---- Chunk #10000 ----
Offset: 13
Size: 68
CRC: fa130394
00000013 | 00 0A 36 08 06 00 00 00 AF 77 9F 68 00 00 00 01 73 52 47 42 | ..6......w.h....sRGB
00000033 | 00 AE CE 1C E9 00 00 20 00 49 44 41 54 78 5E EC DD 75 BC 6F | .........IDATx^..u.o
00000053 | 55 9D FF F1 CF 39 B7 83 1B 70 69 91 54 50 50 46 09 51 41 C5 | U....9...pi.TPPF.QA.
00000073 | 8E F9 19 94 98 E0 08 12 | ........
------ End ------

---- Chunk #10001 ----
Offset: 98
Size: 70
CRC: 80000208
00000098 | 42 74 08 09 0B C5 E2 27 17 A5 E3 22 48 DE E4 C6 39 BF C7 DA | Bt.....'..."H...9...
00000118 | DF DA B1 F6 5E B9 BF 75 5E E7 9F E1 9E EF CA E7 5E FB 7B F9 | ....^..u^.......^.{.
00000138 | F1 7B FB 59 23 97 5E 7D E3 B8 F0 13 4D 60 7C 1C CE 68 98 0C | .{.Y#.^}....M`|..h..
00000158 | 84 00 02 08 20 80 00 02 08 20 | ..........
------ End ------

---- Chunk #10002 ----
Offset: 185
Size: 2
CRC: 20800002
00000185 | 02 08 | ..
------ End ------

Encrypt an inject data in an image:

$ stegano encrypt -i input_image_file_name -k 'pass' -p 'hello' -f 159028 -o output_image_file_name -s
Image encoded and written successfully!

Decrypt, extract secret from an image and remove the secret from the image:

$ stegano decrypt -i input_image_file_name -k 'pass' -f 159028 -o output_image_file_name -s
Your decoded secret is: "hello"

if wrong key is provided:

$ stegano decrypt -i input_image_file_name -k 'invalid' -f 159028 -o output_image_file_name
Your decoded secret is: "qji~s"

if wrong key and wrong offset are provided:

$ stegano decrypt -i input_image_file_name -k 'invalid' -f 159024 -o output_image_file_name
It is a valid PNG file. Let's process it!

---- Header ----
00000000 | 89 50 4E 47 0D 0A 1A 0A | .PNG....
----- End ------

------- Chunk -------
Offset: 159021
Size: 36
CRC: 1348f762
00159021 | 69 6E 76 61 74 6D 7B 76 71 1B 4D C0 1F 8D 24 7F 7C 61 FC 97 | invatm{vq.M...$.|a..
00159041 | 19 9A B0 0D 99 41 D5 E5 BD 20 C0 79 B2 4A 7B C5 | .....A.....y.J{.
-------- End --------

Your decoded secret is: "invatm{vq\u{1b}M�\u{1f}�$\u{7f}|a��\u{19}��\r�A�� �y�J{�"

if correct key and wrong offset are provided:

$ stegano decrypt -i input_image_file_name -k 'pass' -f 159024 -o output_image_file_name
It is a valid PNG file. Let's process it!

---- Header ----
00000000 | 89 50 4E 47 0D 0A 1A 0A | .PNG....
----- End ------

------- Chunk -------
Offset: 159021
Size: 36
CRC: 1348f762
00159021 | 70 61 73 73 68 65 6C 6C 6F 0C 5F DF 06 88 3E 62 7A 61 E3 8D | passhello._...>bza..
00159041 | 0D 92 AD 08 88 4C CF F2 A4 2F C5 6B AE 42 6C DF | .....L.../.k.Bl.
-------- End --------

Your decoded secret is: "passhello\u{c}_�\u{6}�>bza�\r��\u{8}�L��/�k�Bl�"

§Options

Option	Description
Encryption Options
`-a` or `--algo`	Sets the algorithm for encryption (default is “aes”).
`-i` or `--input`	Sets the input file for encryption.
`-o` or `--output`	Sets the output file for the encrypted payload (default is “output.png”).
`-k` or `--key`	Sets the key for payload encryption (default is “key”).
`-s` or `--suppress`	Suppresses output messages.
`-f` or `--offset`	Sets the offset (default is 10).
`-p` or `--payload`	Sets the payload (default is “hello”).
`-t` or `--type`	Sets the type (default is “PNG”).

Decryption Options
`-a` or `--algo`	Sets the algorithm for decryption (default is “aes”).
`-i` or `--input`	Sets the input file for decryption.
`-o` or `--output`	Sets the output file for the decrypted payload (default is “output.png”).
`-k` or `--key`	Sets the key for payload decryption (default is “key”).
`-s` or `--suppress`	Suppresses output messages.
`-f` or `--offset`	Sets the offset (default is 10).
`-p` or `--payload`	Sets the payload (default is “hello”).
`-t` or `--type`	Sets the type (default is “PNG”).

Metadata Options
`-i` or `--input`	Sets the input image file for metadata extraction.
`-n` or `--nb-chunks`	Read a specific number of chunks (default is 100).
`-s` or `--start`	Sets the index of the start chunk to read from (default 0).
`-e` or `--end`	Sets the index of the end chunk to stop reading at (default 100).
`-r` or `--suppress`	Suppresses output messages.

§GitHub Repository

You can access the source code for this crate on GitHub.

§Contributing

Contributions and feedback are welcome! If you’d like to contribute, report an issue, or suggest an enhancement, please engage with the project on GitHub. Your contributions help improve this crate for the community.

Modules§

cli
jpeg
models
utils