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

Completed

Pull Request — master (#69)

unknown

created 2018-08-18 13:55 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

namespace u2flib_server;

use ParagonIE\ConstantTime\Encoding;

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

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

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

Yubico / php-u2flib-server

Pull Request — master (#69)

Convert::pubkeyToPem() A

Complexity

Size

Duplication

Importance

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