mirror of
https://github.com/iv-org/inv_sig_helper.git
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200 lines
6.8 KiB
Markdown
200 lines
6.8 KiB
Markdown
# inv_sig_helper
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`inv_sig_helper` is a Rust service that decrypts YouTube signatures and manages player information. It offers a TCP/Unix socket interface for signature decryption and related operations.
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## Features
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- Decrypt YouTube `n` and `s` signatures
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- Fetch and update YouTube player data
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- Provide signature timestamps and player status
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- Efficient signature decryption with multi-threaded JavaScript execution
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## Run with Docker (recommended method)
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A Dockerfile is included for containerized deployment.
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And an official Docker image is available at `quay.io/invidious/inv-sig-helper`: https://quay.io/repository/invidious/inv-sig-helper
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### Production
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Follow the official installation guide: https://github.com/iv-org/documentation/blob/master/docs/installation.md.
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### Development
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Run the project using docker compose:
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```
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docker compose up -d
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```
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Or you can run it manually but not recommended since you won't lock down the container from potential code execution from Google:
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1. Build the image:
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```
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docker build -t inv_sig_helper .
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```
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2. Run the container:
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```
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docker run -p 127.0.0.1:12999:12999 inv_sig_helper
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```
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## Building and Running without Docker
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### Prerequisites
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- Rust 1.77 or later
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- Cargo
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- Patch
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- openssl-devel
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### Building
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1. Clone the repository and navigate to the project directory:
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```
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git clone https://github.com/iv-org/inv_sig_helper.git
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cd inv_sig_helper
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```
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2. Build the project:
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```
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cargo build --release
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```
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### Running
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#### Warning
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We recommend running sig_helper inside a locked down environment like an LXC container or a systemd service where only the strict necessary is allowed.
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No example outside of Docker have been written for this but feel free to send your contribution.
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This service runs untrusted code directly from Google.
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#### Instructions
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The service can run in Unix socket mode (default) or TCP mode:
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1. Unix socket mode:
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```
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./target/release/inv_sig_helper_rust
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```
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This creates a Unix socket at `/tmp/inv_sig_helper.sock`.
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2. TCP mode:
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```
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./target/release/inv_sig_helper_rust --tcp [IP:PORT]
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```
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If no IP:PORT is given, it defaults to `127.0.0.1:12999`.
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## Protocol Format
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All data-types bigger than 1 byte are stored in network endian (big-endian) unless stated otherwise.
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### Request Base
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| Name | Size (bytes) | Description |
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|-----------|--------------|--------------------------------------|
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|opcode | 1 | The operation code to perform, A list of operations currently supported (and their data) can be found in the **Operations** chapter |
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|request_id | 4 | The ID for the current request, Used to distinguish responses in the current connection |
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The data afterwards depends on the supplied opcode, Please consult the **Operations** chapter for more information.
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### Response Base
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| Name | Size (bytes) | Description |
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|------------|--------------|---------------------------------------|
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|request_id | 4 | The ID for the request that this response is meant for |
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|size | 4 | Size of the response (excluding size of request id)|
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The data afterwards depends on the supplied opcode, Please consult the **Operations** chapter for more information.
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### Operations
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#### `FORCE_UPDATE` (0x00)
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Forces the server to re-fetch the YouTube player, and extract the necessary components from it (`nsig` function code, `sig` function code, signature timestamp).
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##### Request
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*No additional data required*
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##### Response
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| Name | Size (bytes) | Description |
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|------|--------------|-------------|
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|status| 2 | The status code of the request: `0xF44F` if successful, `0xFFFF` if no updating is required (YouTube's player ID is equal to the server's current player ID), `0x0000` if an error occurred |
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#### `DECRYPT_N_SIGNATURE` (0x01)
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Decrypt a provided `n` signature using the server's current `nsig` function code, and return the result (or an error).
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##### Request
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| Name | Size (bytes) | Description |
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|------|--------------|-------------------------------------|
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|size | 2 | The size of the encrypted signature |
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|string| *`size`* | The encrypted signature |
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##### Response
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| Name | Size (bytes) | Description |
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|------|--------------|------------------------------------------------------------------|
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|size | 2 | The size of the decrypted signature, `0x0000` if an error occurred |
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|string| *`size`* | The decrypted signature |
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#### `DECRYPT_SIGNATURE` (0x02)
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Decrypt a provided `s` signature using the server's current `sig` function code, and return the result (or an error).
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##### Request
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| Name | Size (bytes) | Description |
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|------|--------------|-------------------------------------|
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|size | 2 | The size of the encrypted signature |
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|string| *`size`* | The encrypted signature |
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##### Response
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| Name | Size (bytes) | Description |
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|------|--------------|------------------------------------------------------------------|
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|size | 2 | The size of the decrypted signature, `0x0000` if an error occurred |
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|string| *`size`* | The decrypted signature |
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#### `GET_SIGNATURE_TIMESTAMP` (0x03)
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Get the signature timestamp from the server's current player, and return it in the form of a 64-bit integer. If there's no player, it will return 0 in the `timestamp` (Please check with `PLAYER_STATUS` if the server has a player)
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##### Request
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No additional data required
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##### Response
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| Name | Size (bytes) | Description |
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|---------|--------------|----------------------------------------------------------|
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|timestamp| 8 | The signature timestamp from the server's current player |
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#### `PLAYER_STATUS` (0x04)
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Get the server's information about the current player.
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##### Request
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No additional data required
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##### Response
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| Name | Size (bytes) | Description |
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|----------|--------------|-------------|
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|has_player| 1 | If the server has a player, this variable will be `0xFF`. or else, it will be `0x00`|
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|player_id | 4 | The server's current player ID. If the server has no player, this will always be `0x00000000`|
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#### `PLAYER_UPDATE_TIMESTAMP` (0x05)
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Get the time of the last player update, The time is represented as seconds since the last update
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##### Request
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No additional data required
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##### Response
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| Name | Size (bytes) | Description |
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|----------|--------------|-------------|
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|timestamp | 8 | Seconds since the last player update |
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## License
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This project is open source under the AGPL-3.0 license.
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