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<?php |
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/* |
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* Copyright 2019 Google LLC |
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* |
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* Licensed under the Apache License, Version 2.0 (the "License"); |
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* you may not use this file except in compliance with the License. |
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* You may obtain a copy of the License at |
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* |
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* http://www.apache.org/licenses/LICENSE-2.0 |
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* |
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* Unless required by applicable law or agreed to in writing, software |
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* distributed under the License is distributed on an "AS IS" BASIS, |
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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* See the License for the specific language governing permissions and |
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* limitations under the License. |
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*/ |
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|
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namespace Google\Auth; |
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|
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use phpseclib3\Crypt\PublicKeyLoader; |
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use phpseclib3\Crypt\RSA; |
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|
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/** |
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* Sign a string using a Service Account private key. |
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*/ |
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trait ServiceAccountSignerTrait |
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{ |
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/** |
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* Sign a string using the service account private key. |
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* |
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* @param string $stringToSign |
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* @param bool $forceOpenssl Whether to use OpenSSL regardless of |
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* whether phpseclib is installed. **Defaults to** `false`. |
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* @return string |
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*/ |
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public function signBlob($stringToSign, $forceOpenssl = false) |
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{ |
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$privateKey = $this->auth->getSigningKey(); |
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|
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$signedString = ''; |
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if (class_exists(phpseclib3\Crypt\RSA::class) && !$forceOpenssl) { |
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$key = PublicKeyLoader::load($privateKey); |
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$rsa = $key->withHash('sha256')->withPadding(RSA::SIGNATURE_PKCS1); |
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|
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$signedString = $rsa->sign($stringToSign); |
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} elseif (extension_loaded('openssl')) { |
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openssl_sign($stringToSign, $signedString, $privateKey, 'sha256WithRSAEncryption'); |
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} else { |
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// @codeCoverageIgnoreStart |
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throw new \RuntimeException('OpenSSL is not installed.'); |
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} |
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// @codeCoverageIgnoreEnd |
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|
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return base64_encode($signedString); |
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} |
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} |
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|
