Setup

• Nginx
• php-fpm
• php-redis
• php-curl
• php-gmp
• Redis

Nginx handler

location ~* "^\/([0-9a-z]{27})$" {
		try_files $uri /src/php/handler.php?h=download&id=$1;
}

Void Binary File Format (VBF2)

All numbers are little endian

Name	Size	Description
version	1 byte unsigned number	Binary file format version
magic	4 bytes	"VOID" encoded to UTF8 string
uploaded	4 byte unsigned number	Unix timestamp of when the upload started
payload	EOF - 32 bytes	The encrypted payload
hash	32 bytes HMAC-SHA265	The HMAC of the unencrypted file*

* Using the encryption key as the HMAC key

VBF Payload Format

Name	Size	Description
header_length	2 byte unsigned number	Length of the header section
header	{header_length} UTF8 String	The header json
file	>EOF	The file