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<?php |
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declare(strict_types = 1); |
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namespace Sop\JWX\Util; |
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/** |
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* Class offering Base64 encoding and decoding. |
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*/ |
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class Base64 |
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{ |
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/** |
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* Encode a string using base64url variant. |
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* |
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* @see https://en.wikipedia.org/wiki/Base64#URL_applications |
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* |
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* @param string $data |
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* |
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* @return string |
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*/ |
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170 |
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public static function urlEncode(string $data): string |
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{ |
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return strtr(rtrim(self::encode($data), '='), '+/', '-_'); |
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} |
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/** |
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* Decode a string using base64url variant. |
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* |
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* @see https://en.wikipedia.org/wiki/Base64#URL_applications |
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* |
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* @param string $data |
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* |
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* @throws \UnexpectedValueException |
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* |
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* @return string |
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*/ |
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130 |
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public static function urlDecode(string $data): string |
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{ |
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130 |
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$data = strtr($data, '-_', '+/'); |
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130 |
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switch (strlen($data) % 4) { |
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130 |
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case 0: |
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78 |
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break; |
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112 |
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case 2: |
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80 |
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$data .= '=='; |
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80 |
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break; |
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68 |
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case 3: |
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67 |
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$data .= '='; |
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67 |
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break; |
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default: |
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1 |
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throw new \UnexpectedValueException( |
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1 |
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'Malformed base64url encoding.'); |
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} |
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129 |
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return self::decode($data); |
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} |
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/** |
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* Check whether string is validly base64url encoded. |
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* |
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* @see https://en.wikipedia.org/wiki/Base64#URL_applications |
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* |
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* @param string $data |
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* |
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* @return bool |
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*/ |
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141 |
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public static function isValidURLEncoding(string $data): bool |
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{ |
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return 1 === preg_match('#^[A-Za-z0-9\-_]*$#', $data); |
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} |
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/** |
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* Encode a string in base64. |
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* |
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* @see https://tools.ietf.org/html/rfc4648#section-4 |
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* |
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* @param string $data |
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* |
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* @return string |
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*/ |
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173 |
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public static function encode(string $data): string |
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{ |
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return base64_encode($data); |
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} |
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84
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/** |
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* Decode a string from base64 encoding. |
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* |
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* @see https://tools.ietf.org/html/rfc4648#section-4 |
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* |
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* @param string $data |
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* |
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* @throws \RuntimeException If decoding fails |
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* |
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* @return string |
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*/ |
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131 |
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public static function decode(string $data): string |
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{ |
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131 |
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$ret = base64_decode($data, true); |
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131 |
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if (!is_string($ret)) { |
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1 |
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$err = error_get_last(); |
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1 |
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$msg = isset($err) && __FILE__ === $err['file'] ? $err['message'] : null; |
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1 |
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throw new \RuntimeException($msg ?? 'base64_decode() failed.'); |
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} |
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130 |
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return $ret; |
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} |
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/** |
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* Check whether string is validly base64 encoded. |
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* |
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* @see https://tools.ietf.org/html/rfc4648#section-4 |
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* |
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111
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* @param string $data |
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112
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* |
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113
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* @return bool |
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114
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*/ |
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115
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7 |
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public static function isValid(string $data): bool |
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116
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{ |
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7 |
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return 1 === preg_match('#^[A-Za-z0-9+/]*={0,2}$#', $data); |
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} |
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119
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} |
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sop /
jwx
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