47 lines
1.2 KiB
PHP
47 lines
1.2 KiB
PHP
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<?php
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namespace Webauthn;
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use CBOR\ByteStringObject;
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use CBOR\MapItem;
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use CBOR\MapObject;
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use CBOR\NegativeIntegerObject;
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use CBOR\UnsignedIntegerObject;
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class U2FPublicKey
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{
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public static function isU2FKey($publicKey): bool
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{
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return $publicKey[0] === "\x04";
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}
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public static function createCOSEKey($publicKey): string
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{
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$mapObject = new MapObject([
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1 => MapItem::create(
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new UnsignedIntegerObject(1, null),
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new UnsignedIntegerObject(2, null)
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),
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3 => MapItem::create(
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new UnsignedIntegerObject(3, null),
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new NegativeIntegerObject(6, null)
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),
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-1 => MapItem::create(
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new NegativeIntegerObject(0, null),
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new UnsignedIntegerObject(1, null)
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),
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-2 => MapItem::create(
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new NegativeIntegerObject(1, null),
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new ByteStringObject(substr($publicKey, 1, 32))
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),
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-3 => MapItem::create(
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new NegativeIntegerObject(2, null),
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new ByteStringObject(substr($publicKey, 33))
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),
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]);
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return $mapObject->__toString();
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}
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}
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