SHA256-Magic
Lance MarchettiMy project involves hashing a file and then locking the hash to the file by deleting the characters in the binary according to their column position sequence found in the hash string. Once the coordinate key is generated, we can then recall the characters from the hash string to populate their positions again in the binary file.
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How SHA256-Magic Works
SHA256-Magic hashes your source, weaves the hash into its raw binary, and lets you restore every missing byte later with nothing but the hash and a coordinate key. Follow the three core workflows below to master the entire pipeline.
Hashing
Upload a source file and generate its SHA-256 hash. The hash fingerprint is derived from every byte of your file.
- Upload your source file
- SHA-256 hash is computed
- Download hash as .hash file
Mapping
Identify every character of the hash inside the raw binary, record column positions, and remove them.
- Locate hash chars in binary
- Record coordinate positions
- Delete marked characters
Recovery
Upload the hash, edited source .bin, and coordinate key. The system restores every missing byte automatically.
- Upload hash + .bin + key
- System rebuilds original file
- Download restored file
How can we help?
Select a workflow below to jump directly to its step-by-step guide. Each section walks you through one stage of the hashing, mapping, and recovery process.
Workflow 1
Hashing & Locking
Upload your source file, generate its SHA-256 hash, and lock the fingerprint into the binary.
Workflow 2
Mapping & Removal
Identify hash characters in the raw binary, record their positions, and delete marked bytes.
Workflow 3
Recovery & Restore
Upload the hash, edited bin, and coordinate key to automatically restore every missing byte.
Reference
Frequently Asked Questions
File size limits, supported formats, coordinate key format, and file naming conventions.
Hashing Workflow
Upload Your Source File
Select or drag your source file into the upload area on the Hashing page. SHA256-Magic accepts any binary file and processes it entirely in your browser — your file never leaves your machine.
Generate the SHA-256 Hash
Once uploaded, SHA256-Magic computes the full SHA-256 digest of the original source. The hash is displayed on screen and available for download as a .hash file — named after your source filename with a .hash extension.
source_filename_.hashDownload the Edited Source (Hash-Named .bin)
SHA256-Magic weaves the hash characters into the raw binary and produces an edited source file. The filename of this edited source is the actual SHA-256 hash of the original source — not a random name.
a2bb78c1f3e5d90a7b4c6e8f2d1a3b5c7e9f0a2b4d6c8e1f3a5b7c9d0e2f4a6.binVerify and Move to Mapping
You now have two files: the hash file (source_filename_.hash) and the edited binary (a2bb78c…bin). The next phase — Mapping — lets you identify where each hash character lives inside the binary so you can record coordinates for later recovery.
How to Map & Edit Your Binary
Follow these steps to identify hash characters, record their positions, remove them from the binary, and save the edited file for recovery.
Identify Hash Characters in Binary
Scan the raw binary for each hex character
Open the source_filename_.hash file to see your SHA-256 hash. Then, open the original source file in a hex editor or binary viewer. Scan through the raw bytes and locate every character from the hash string within the binary. Each hex character (0-9, a-f) appears as its ASCII byte value in the source.
Record Column Positions
Track every coordinate precisely
For each hash character you find, record its exact column position (byte offset) in the binary file. These positions form your coordinate key — the essential map that tells the recovery tool exactly where to reinsert characters later. Save this as your coordinates_key.txt file.
| Hash Character | Column Position |
|---|---|
| a | 0x001F |
| 2 | 0x003C |
| b | 0x0059 |
| b | 0x0074 |
| 7 | 0x0091 |
| 8 | 0x00AE |
| c | 0x00C3 |
| f | 0x00E0 |
Delete Marked Characters
Remove hash characters from their recorded positions
Using a hex editor, delete each byte at the recorded positions. You are removing the hash characters from the binary, leaving holes where they once were. The file shrinks by exactly 64 bytes (one per SHA-256 hex character). Take care not to delete adjacent bytes — precision matters.
Download the Edited Binary
Save your modified file with the hash as its name
Save the edited binary file. Name it using the actual SHA-256 hash of the original source as the filename — for example, a2bb78c...bin. This naming convention is how the Recovery tool identifies which hash to use when restoring missing bytes.
a2bb78c9..., the edited file becomes a2bb78c9...bin.Restore Your Original File
Upload the hash file, the edited binary, and the coordinates key. SHA256-Magic will reconstruct your original source byte by byte and confirm integrity with a matching hash.
Upload the SHA-256 Hash File
Start by providing the hash file that was generated during the Hashing step.
Upload the Edited Binary File
Provide the edited source binary file whose filename is its own SHA-256 hash.
Upload the Coordinates Key
Provide the coordinates file that maps each hash character to its original position in the binary.
Restore the Original File
SHA256-Magic automatically reconstructs the original source by inserting hash bytes back into their recorded positions.
Got questions? We have answers.
Common questions about file hashing, binary mapping, recovery workflows, and troubleshooting tips for SHA256-Magic.
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