Node.js 中的 crypto.createVerify() 方法
crypto.createVerify() 将创建一个并返回一个验证对象,该对象使用参数中传递的算法。可以使用 crypto.getHashes() 获取所有可用签名算法的名称。可以使用签名算法的名称(例如“RHA-SHA256”)创建一个 Verify 实例,仅在某些情况下,而不是摘要算法。
语法
crypto.createVerify(algorithm, [options])
参数
以下是上述参数的说明 −
algorithm – 它获取用于在创建验证对象/实例时使用的算法名称。
options – 这是一个可选参数,可用于控制流行为。
示例
创建一个名为 createVerify.js 的文件,并复制以下代码段。创建文件后,使用以下命令运行此代码,如下面的示例所示 −
node createVerify.js
createVerify.js
// Node.js program to demonstrate the use of createVerify() method // Importing the crypto module const crypto = require('crypto'); // Creating verify object with the input algorithm const verify = crypto.createVerify('SHA256'); // Returning the verify object console.log(verify);
输出
C:\home
ode>> node createVerify.js Verify { _handle: {}, _writableState: WritableState { objectMode: false, highWaterMark: 16384, finalCalled: false, needDrain: false, ending: false, ended: false, finished: false, destroyed: false, decodeStrings: true, defaultEncoding: 'utf8', length: 0, writing: false, corked: 0, sync: true, bufferProcessing: false, onwrite: [Function: bound onwrite], writecb: null, writelen: 0, bufferedRequest: null, lastBufferedRequest: null, pendingcb: 0, prefinished: false, errorEmitted: false, emitClose: true, autoDestroy: false, bufferedRequestCount: 0, corkedRequestsFree: { next: null, entry: null, finish: [Function: bound onCorkedFinish] } }, writable: true, _events: [Object: null prototype] {}, _eventsCount: 0, _maxListeners: undefined }
示例
我们再来看一个示例。
// Node.js program to demonstrate the use of createVerify() method // Importing the crypto module const crypto = require('crypto'); // Creating the verify object from SHA256 algo const verify = crypto.createVerify('SHA256'); // Writing the below data to be signed and verified verify.write('TutorialPoint'); // Ending the method verify.end(); // Beginning public key execution const l1 = "-----BEGIN PUBLIC KEY-----
" // Encrypted data const l2 = "MFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAEXIvPbzLjaPLd8jgiv1TL/X8PXpJNgDkGRj9U9Lcx1 yKURpQFVavcMkfWyO8r7JlZNMax0JKfLZUM1IePRjHlFw==" // Finishing public key execution const l3 = "
-----END PUBLIC KEY-----" // concatenating all public keys const publicKey = l1 + l2 + l3 // Signature that will be verified const signature = "MEYCIQCPfWhpzxMqu3gZWflBm5V0aetgb2/S+SGyGcElaOjgdgIhALaD4lbxVwa8HUUBFOLz+CGvI ioDkf9oihSnXHCqh8yV"; // Prints true if signature is verified else false console.log(verify.verify(publicKey, signature));
输出
C:\home
ode>> node createVerify.js false
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