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verifyAsymmetricEc.js
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verifyAsymmetricEc.js
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// Copyright 2020 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
'use strict';
async function main(
projectId = 'your-project-id',
locationId = 'us-east1',
keyRingId = 'my-key-ring',
keyId = 'my-key',
versionId = '1',
message = 'my message to verify',
signatureBuffer = Buffer.from('...')
) {
// [START kms_verify_asymmetric_signature_ec]
//
// TODO(developer): Uncomment these variables before running the sample.
//
// const projectId = 'your-project-id';
// const locationId = 'us-east1';
// const keyRingId = 'my-key-ring';
// const keyId = 'my-key';
// const versionId = '1';
// const message = 'my message to verify';
// const signatureBuffer = Buffer.from('...');
// Imports the Cloud KMS library
const {KeyManagementServiceClient} = require('@google-cloud/kms');
// Instantiates a client
const client = new KeyManagementServiceClient();
// Build the key name
const versionName = client.cryptoKeyVersionPath(
projectId,
locationId,
keyRingId,
keyId,
versionId
);
async function verifyAsymmetricSignatureEc() {
// Get public key
const [publicKey] = await client.getPublicKey({
name: versionName,
});
// Create the verifier. The algorithm must match the algorithm of the key.
const crypto = require('crypto');
const verify = crypto.createVerify('sha256');
verify.update(message);
verify.end();
// Build the key object
const key = {
key: publicKey.pem,
};
// Verify the signature using the public key
const verified = verify.verify(key, signatureBuffer);
return verified;
}
return verifyAsymmetricSignatureEc();
// [END kms_verify_asymmetric_signature_ec]
}
module.exports.main = main;
/* c8 ignore next 10 */
if (require.main === module) {
main(...process.argv.slice(2)).catch(err => {
console.error(err.message);
process.exitCode = 1;
});
process.on('unhandledRejection', err => {
console.error(err.message);
process.exitCode = 1;
});
}