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<?php |
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namespace rhertogh\Yii2SecurityTxt\helpers\GPG\traits; |
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use gnupg; |
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use Yii; |
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use yii\base\InvalidConfigException; |
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use yii\helpers\FileHelper; |
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trait GnupgExtensionTrait |
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{ |
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/** |
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* @throws InvalidConfigException |
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*/ |
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protected static function signViaGnupgExtension($message, $privateKey) |
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{ |
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Yii::beginProfile('Generate PGP signature', __METHOD__); |
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$gpg = static::getGnupg($gnupgHome); |
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try { |
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$gpg->seterrormode(GNUPG_ERROR_EXCEPTION); |
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$keyInfo = $gpg->import($privateKey); |
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if ($keyInfo === false) { |
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throw new InvalidConfigException('Unable to import private key. Debug info: ' |
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. var_export(static::generateGnupgDebugInfo($gpg), true)); |
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} |
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$gpg->addsignkey($keyInfo['fingerprint']); |
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$gpg->setsignmode(gnupg::SIG_MODE_CLEAR); |
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$output = $gpg->sign($message); |
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} finally { |
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FileHelper::removeDirectory($gnupgHome); |
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} |
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if ($output === false) { |
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throw new InvalidConfigException('Unable to sign the message. Debug info: ' |
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. var_export(static::generateGnupgDebugInfo($gpg), true)); |
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} |
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Yii::endProfile('Generate PGP signature', __METHOD__); |
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return $output; |
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} |
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/** |
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* @throws InvalidConfigException |
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*/ |
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protected static function verifyViaGnupgExtension($message, $publicKey) |
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{ |
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Yii::beginProfile('Verify PGP signature', __METHOD__); |
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$gpg = static::getGnupg($gnupgHome); |
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try { |
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$gpg->seterrormode(GNUPG_ERROR_EXCEPTION); |
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$keyInfo = $gpg->import($publicKey); |
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if ($keyInfo === false) { |
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throw new InvalidConfigException('Unable to import public key. Debug info: ' |
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. var_export(static::generateGnupgDebugInfo($gpg), true)); |
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} |
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$gpg->addencryptkey($keyInfo['fingerprint']); |
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$info = $gpg->verify($message,false,$plaintext); |
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} finally { |
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FileHelper::removeDirectory($gnupgHome); |
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} |
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if ($info === false) { |
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throw new InvalidConfigException('Unable to verify the message. Debug info: ' |
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. var_export(static::generateGnupgDebugInfo($gpg), true)); |
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} |
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if ($info[0]['summary'] !== 0) { |
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// Invalid signature |
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return false; |
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} |
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Yii::endProfile('Verify PGP signature', __METHOD__); |
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return $plaintext; |
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} |
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protected static function generateGnupgDebugInfo(gnupg $gpg) |
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{ |
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$debugInfo = [ |
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'engineInfo' => $gpg->getengineinfo(), |
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'errorInfo' => $gpg->geterrorinfo(), |
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]; |
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if (!is_writable($debugInfo['engineInfo']['home_dir'])) { |
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$debugInfo['hint'] = 'The gnupg home directory (' . $debugInfo['engineInfo']['home_dir'] . ') is not writable.'; |
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} |
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return $debugInfo; |
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} |
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protected static function getGnupg(&$gnupgHome = null): gnupg |
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{ |
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if (empty($gnupgHome)) { |
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$gnupgHome = Yii::getAlias('@runtime') . '/gnupg/' . uniqid(more_entropy: true); |
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FileHelper::createDirectory($gnupgHome); |
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} |
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return new gnupg(['home_dir' => $gnupgHome]); |
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} |
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} |
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rhertogh /
yii2-security.txt
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