ParagonIE_Sodium_File::box

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Summery Summery

Box a file (rather than a string). Uses less memory than ParagonIE_Sodium_Compat::crypto_box(), but produces the same result.

Syntax Syntax

ParagonIE_Sodium_File::box( string $inputFile, string $outputFile, string $nonce, string $keyPair )

Parameters Parameters

$inputFile

(string) (Required) Absolute path to a file on the filesystem

$outputFile

(string) (Required) Absolute path to a file on the filesystem

$nonce

(string) (Required) Number to be used only once

$keyPair

(string) (Required) ECDH secret key and ECDH public key concatenated

Return Return

(bool)

Source Source

File: wp-includes/sodium_compat/src/File.php

    public static function box($inputFile, $outputFile, $nonce, $keyPair)
    {
        /* Type checks: */
        if (!is_string($inputFile)) {
            throw new TypeError('Argument 1 must be a string, ' . gettype($inputFile) . ' given.');
        }
        if (!is_string($outputFile)) {
            throw new TypeError('Argument 2 must be a string, ' . gettype($outputFile) . ' given.');
        }
        if (!is_string($nonce)) {
            throw new TypeError('Argument 3 must be a string, ' . gettype($nonce) . ' given.');
        }

        /* Input validation: */
        if (!is_string($keyPair)) {
            throw new TypeError('Argument 4 must be a string, ' . gettype($keyPair) . ' given.');
        }
        if (self::strlen($nonce) !== ParagonIE_Sodium_Compat::CRYPTO_BOX_NONCEBYTES) {
            throw new TypeError('Argument 3 must be CRYPTO_BOX_NONCEBYTES bytes');
        }
        if (self::strlen($keyPair) !== ParagonIE_Sodium_Compat::CRYPTO_BOX_KEYPAIRBYTES) {
            throw new TypeError('Argument 4 must be CRYPTO_BOX_KEYPAIRBYTES bytes');
        }

        /** @var int $size */
        $size = filesize($inputFile);
        if (!is_int($size)) {
            throw new SodiumException('Could not obtain the file size');
        }

        /** @var resource $ifp */
        $ifp = fopen($inputFile, 'rb');
        if (!is_resource($ifp)) {
            throw new SodiumException('Could not open input file for reading');
        }

        /** @var resource $ofp */
        $ofp = fopen($outputFile, 'wb');
        if (!is_resource($ofp)) {
            fclose($ifp);
            throw new SodiumException('Could not open output file for writing');
        }

        $res = self::box_encrypt($ifp, $ofp, $size, $nonce, $keyPair);
        fclose($ifp);
        fclose($ofp);
        return $res;
    }

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