Convert::pubkeyToPem() - Code Metrics - Inspection of "Code cleanup, PSR-2/4, security fixes, and PHP 7 o..." - Yubico/php-u2flib-server - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Pull Request — master (#70)

unknown

created 2018-08-18 14:02 UTC

Convert::pubkeyToPem() A

↳ Parent: Convert

Complexity

Conditions	3
Paths	2

Size

Total Lines

Duplication

Lines	0
Ratio	0 %

Importance

Changes

Metric	Value
dl	0
loc	26
rs	9.504
c	0
b	0
f	0
cc	3
nc	2
nop	1

<?php

declare(strict_types=1);

namespace u2flib_server;

use ParagonIE\ConstantTime\Encoding;

/**
 * Class Convert
 *
 * @package u2flib_server
 */
class Convert
{
    /**
     * @param string $data
     *
     * @return string
     */
    public static function base64uEncode(string $data): string
    {
        return trim(strtr(Encoding::base64Encode($data), '+/', '-_'), '=');
    }

    /**
     * @param string $data
     *
     * @return string
     */
    public static function base64uDecode(string $data): string
    {
        return Encoding::base64Decode(strtr($data, '-_', '+/'));
    }

    /**
     * Convert the public key to binary DER format first
     * Using the ECC SubjectPublicKeyInfo OIDs from RFC 5480
     *
     * @param string $key
     *
     * @return null|string
     */
    public static function pubkeyToPem(string $key)
    {
        if (strlen($key) !== PUBKEY_LEN || $key[0] !== "\x04") {
            return null;
        }

        /*
         * Convert the public key to binary DER format first
         * Using the ECC SubjectPublicKeyInfo OIDs from RFC 5480
         *
         *  SEQUENCE(2 elem)                        30 59
         *   SEQUENCE(2 elem)                       30 13
         *    OID1.2.840.10045.2.1 (id-ecPublicKey) 06 07 2a 86 48 ce 3d 02 01
         *    OID1.2.840.10045.3.1.7 (secp256r1)    06 08 2a 86 48 ce 3d 03 01 07
         *   BIT STRING(520 bit)                    03 42 ..key..
         */
        $der = "\x30\x59\x30\x13\x06\x07\x2a\x86\x48\xce\x3d\x02\x01";
        $der .= "\x06\x08\x2a\x86\x48\xce\x3d\x03\x01\x07\x03\x42";
        $der .= "\0" . $key;

        $pem = "-----BEGIN PUBLIC KEY-----\r\n";
        $pem .= chunk_split(Encoding::base64Encode($der), 64);
        $pem .= '-----END PUBLIC KEY-----';

        return $pem;
    }
}


1			<?php
2
3			declare(strict_types=1);
4
5			namespace u2flib_server;
6
7			use ParagonIE\ConstantTime\Encoding;
8
9			/**
10			* Class Convert
11			*
12			* @package u2flib_server
13			*/
14			class Convert
15			{
16			/**
17			* @param string $data
18			*
19			* @return string
20			*/
21			public static function base64uEncode(string $data): string
22			{
23			return trim(strtr(Encoding::base64Encode($data), '+/', '-_'), '=');
24			}
25
26			/**
27			* @param string $data
28			*
29			* @return string
30			*/
31			public static function base64uDecode(string $data): string
32			{
33			return Encoding::base64Decode(strtr($data, '-_', '+/'));
34			}
35
36			/**
37			* Convert the public key to binary DER format first
38			* Using the ECC SubjectPublicKeyInfo OIDs from RFC 5480
39			*
40			* @param string $key
41			*
42			* @return null\|string
43			*/
44			public static function pubkeyToPem(string $key)
45			{
46			if (strlen($key) !== PUBKEY_LEN \|\| $key[0] !== "\x04") {
47			return null;
48			}
49
50			/*
51			* Convert the public key to binary DER format first
52			* Using the ECC SubjectPublicKeyInfo OIDs from RFC 5480
53			*
54			* SEQUENCE(2 elem) 30 59
55			* SEQUENCE(2 elem) 30 13
56			* OID1.2.840.10045.2.1 (id-ecPublicKey) 06 07 2a 86 48 ce 3d 02 01
57			* OID1.2.840.10045.3.1.7 (secp256r1) 06 08 2a 86 48 ce 3d 03 01 07
58			* BIT STRING(520 bit) 03 42 ..key..
59			*/
60			$der = "\x30\x59\x30\x13\x06\x07\x2a\x86\x48\xce\x3d\x02\x01";
61			$der .= "\x06\x08\x2a\x86\x48\xce\x3d\x03\x01\x07\x03\x42";
62			$der .= "\0" . $key;
63
64			$pem = "-----BEGIN PUBLIC KEY-----\r\n";
65			$pem .= chunk_split(Encoding::base64Encode($der), 64);
66			$pem .= '-----END PUBLIC KEY-----';
67
68			return $pem;
69			}
70			}
71

Yubico / php-u2flib-server

Pull Request — master (#70)

Convert::pubkeyToPem() A

Complexity

Size

Duplication

Importance

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