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pma/vendor/web-auth/cose-lib/src/Key/RsaKey.php

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+<?php
+
+declare(strict_types=1);
+
+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2014-2021 Spomky-Labs
+ *
+ * This software may be modified and distributed under the terms
+ * of the MIT license.  See the LICENSE file for details.
+ */
+
+namespace Cose\Key;
+
+use function array_key_exists;
+use Assert\Assertion;
+use Brick\Math\BigInteger;
+use FG\ASN1\Universal\BitString;
+use FG\ASN1\Universal\Integer;
+use FG\ASN1\Universal\NullObject;
+use FG\ASN1\Universal\ObjectIdentifier;
+use FG\ASN1\Universal\Sequence;
+use InvalidArgumentException;
+
+class RsaKey extends Key
+{
+    public const DATA_N = -1;
+    public const DATA_E = -2;
+    public const DATA_D = -3;
+    public const DATA_P = -4;
+    public const DATA_Q = -5;
+    public const DATA_DP = -6;
+    public const DATA_DQ = -7;
+    public const DATA_QI = -8;
+    public const DATA_OTHER = -9;
+    public const DATA_RI = -10;
+    public const DATA_DI = -11;
+    public const DATA_TI = -12;
+
+    public function __construct(array $data)
+    {
+        parent::__construct($data);
+        Assertion::eq($data[self::TYPE], self::TYPE_RSA, 'Invalid RSA key. The key type does not correspond to a RSA key');
+        Assertion::keyExists($data, self::DATA_N, 'Invalid RSA key. The modulus is missing');
+        Assertion::keyExists($data, self::DATA_E, 'Invalid RSA key. The exponent is missing');
+    }
+
+    public function n(): string
+    {
+        return $this->get(self::DATA_N);
+    }
+
+    public function e(): string
+    {
+        return $this->get(self::DATA_E);
+    }
+
+    public function d(): string
+    {
+        Assertion::true($this->isPrivate(), 'The key is not private.');
+
+        return $this->get(self::DATA_D);
+    }
+
+    public function p(): string
+    {
+        Assertion::true($this->isPrivate(), 'The key is not private.');
+
+        return $this->get(self::DATA_P);
+    }
+
+    public function q(): string
+    {
+        Assertion::true($this->isPrivate(), 'The key is not private.');
+
+        return $this->get(self::DATA_Q);
+    }
+
+    public function dP(): string
+    {
+        Assertion::true($this->isPrivate(), 'The key is not private.');
+
+        return $this->get(self::DATA_DP);
+    }
+
+    public function dQ(): string
+    {
+        Assertion::true($this->isPrivate(), 'The key is not private.');
+
+        return $this->get(self::DATA_DQ);
+    }
+
+    public function QInv(): string
+    {
+        Assertion::true($this->isPrivate(), 'The key is not private.');
+
+        return $this->get(self::DATA_QI);
+    }
+
+    public function other(): array
+    {
+        Assertion::true($this->isPrivate(), 'The key is not private.');
+
+        return $this->get(self::DATA_OTHER);
+    }
+
+    public function rI(): string
+    {
+        Assertion::true($this->isPrivate(), 'The key is not private.');
+
+        return $this->get(self::DATA_RI);
+    }
+
+    public function dI(): string
+    {
+        Assertion::true($this->isPrivate(), 'The key is not private.');
+
+        return $this->get(self::DATA_DI);
+    }
+
+    public function tI(): string
+    {
+        Assertion::true($this->isPrivate(), 'The key is not private.');
+
+        return $this->get(self::DATA_TI);
+    }
+
+    public function hasPrimes(): bool
+    {
+        return $this->has(self::DATA_P) && $this->has(self::DATA_Q);
+    }
+
+    public function primes(): array
+    {
+        return [
+            $this->p(),
+            $this->q(),
+        ];
+    }
+
+    public function hasExponents(): bool
+    {
+        return $this->has(self::DATA_DP) && $this->has(self::DATA_DQ);
+    }
+
+    public function exponents(): array
+    {
+        return [
+            $this->dP(),
+            $this->dQ(),
+        ];
+    }
+
+    public function hasCoefficient(): bool
+    {
+        return $this->has(self::DATA_QI);
+    }
+
+    public function isPublic(): bool
+    {
+        return !$this->isPrivate();
+    }
+
+    public function isPrivate(): bool
+    {
+        return array_key_exists(self::DATA_D, $this->getData());
+    }
+
+    public function asPem(): string
+    {
+        Assertion::false($this->isPrivate(), 'Unsupported for private keys.');
+        $bitSring = new Sequence(
+            new Integer($this->fromBase64ToInteger($this->n())),
+            new Integer($this->fromBase64ToInteger($this->e()))
+        );
+
+        $der = new Sequence(
+            new Sequence(
+                new ObjectIdentifier('1.2.840.113549.1.1.1'),
+                new NullObject()
+            ),
+            new BitString(bin2hex($bitSring->getBinary()))
+        );
+
+        return $this->pem('PUBLIC KEY', $der->getBinary());
+    }
+
+    private function fromBase64ToInteger(string $value): string
+    {
+        $data = unpack('H*', $value);
+        if (false === $data) {
+            throw new InvalidArgumentException('Unable to convert to an integer');
+        }
+
+        $hex = current($data);
+
+        return BigInteger::fromBase($hex, 16)->toBase(10);
+    }
+
+    private function pem(string $type, string $der): string
+    {
+        return sprintf("-----BEGIN %s-----\n", mb_strtoupper($type)).
+            chunk_split(base64_encode($der), 64, "\n").
+            sprintf("-----END %s-----\n", mb_strtoupper($type));
+    }
+}