generated from jric11/baseProject
21 lines
1.2 KiB
PHP
21 lines
1.2 KiB
PHP
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<?php
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/** Render the pending authenticator secret without external services or files. */
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final class MfaSetupQr {
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public static function dataUri(string $secret,string $email): string {
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$otp=OTPHP\TOTP::createFromSecret($secret,new MfaClock())
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->withIssuer(Base::APPLICATION_NAME)->withLabel($email);
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$barcode=new TCPDF2DBarcode($otp->getProvisioningUri(),'QRCODE,M');
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$matrix=$barcode->getBarcodeArray();
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$size=(int)$matrix['num_cols'];$height=(int)$matrix['num_rows'];
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if($size<1||$height!==$size)throw new RuntimeException('Cannot generate authenticator QR code.');
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// A four-module white quiet zone keeps the image scannable on dark pages.
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$edge=$size+8;$path='';
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for($y=0;$y<$size;$y++)for($x=0;$x<$size;$x++){
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if($matrix['bcode'][$y][$x])$path.='M'.($x+4).' '.($y+4).'h1v1h-1z';
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}
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$svg='<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 '.$edge.' '.$edge.'" width="'.$edge.'" height="'.$edge.'" shape-rendering="crispEdges"><rect width="100%" height="100%" fill="white"/><path d="'.$path.'" fill="black"/></svg>';
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return 'data:image/svg+xml;base64,'.base64_encode($svg);
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}
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}
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