Node.js keyObject.asymmetricKeyDetails用法及代碼示例

在本文中，我們將了解 KeyObject 類的 NodeJS keyObject.ametryKeyDetails 屬性。 KeyObject 類用於表示特定於算法的 key ，並包含用於處理加密 key 實例的內置函數或方法。 asymmetryKeyDetails 屬性將為您提供有關加密 key 對象的詳細信息，其中包括基本詳細信息或您在方法中指定的參數值。

用法:以下是 asymmetryKeyDetails 屬性的語法。

key_object.asymmetricKeyDetails

以下示例將有助於理解該屬性的使用。

示例 1：在此示例中，我們將使用以下命令生成加密 key RSASSA-PKCS1-v1_5算法，並將將此加密 key 轉換為 keyObject。 key 將是私鑰和公鑰的對象，但我們隻能將單個 key 轉換為 key 對象。首先，我們將從生成的對象中提取私鑰和公鑰，然後將兩個 key 傳遞給keyObject.from()方法生成 keyObject。之後，我們將使用key_object.asymmetryKeyDetails 屬性獲取生成的 keyObject 的詳細信息。

Javascript


// Importing the crypto module
const { Console } = require('node:console');
const {
    webcrypto: { subtle }, KeyObject
} = require('node:crypto');
// Async function
(async function () {
    // Generating the crypto key 
    // RSA Algorithm
    const k = await subtle.generateKey(
        {
            // Algorithm name
            name: "RSASSA-PKCS1-v1_5",
            // Length of RSA modulus in bits (number of bits)    
            modulusLength: 4096,
            // Unit8Array -  consists of 8-bit unsigned integers
            publicExponent: new Unit8Array([3, 5, 17]),
            // digital hash function
            hash: "SHA-256"
        }
        // Key is not exportable.
        , false,
        // Key can be used for generating and verifying 
        // the digital signature.
        ['sign', 'verify']
    );
    // Generating keyObject for private Key
    const private_key_object = KeyObject.from(k.privateKey);
    // Printing the asymmetricKeyDetails of private KeyObject
    console.log("private_key_object.asymmetricKeyDetails: ",
        private_key_object.asymmetricKeyDetails);
    // Generating keyObject for public Key
    const public_key_object = KeyObject.from(k.publicKey);
    // Printing the asymmetricKeyDetails  of public KeyObject
    console.log("public_key_object.asymmetricKeyDetails: ",
        public_key_object.asymmetricKeyDetails);
})();

輸出：

private_key_object.asymmetricKeyDetails: { modulusLength: 4096, publicExponent: 197905n }

public_key_object.asymmetricKeyDetails: { modulusLength: 4096, publicExponent: 197905n }

示例 2：在此示例中，我們將使用 “RSA-PSS” 算法生成加密 key ，並將該加密 key 轉換為 keyObject，並獲取生成的 key 的詳細信息。

Javascript


//Importing the crypto module
const { Console } = require('node:console');
const {
    webcrypto: { subtle }, KeyObject
} = require('node:crypto');
// Async function
(async function () {
    // Generating the crypto key 
    // RSA  Algorithm
    const k = await subtle.generateKey(
        {
            // Algorithm name
            name: "RSA-PSS",
            // Length of RSA modulus in bits (number of bits)
            modulusLength: 2048,
            // Unit8Array -  consists of 8-bit unsigned integers
            publicExponent: new Unit8Array([3, 5, 17]),
            // Digital hash function
            hash: "SHA-256"
        }
        // Key is not exportable
        , false,
        // Key can be used for generating and verifying 
        // the digital signature
        ['sign', 'verify']
    );
    // Generating keyObject for private Key
    const private_key_object = KeyObject.from(k.privateKey);
    // printing the asymmetricKeyDetails of private KeyObject
    console.log("private_key_object.asymmetricKeyDetails: ",
        private_key_object.asymmetricKeyDetails);
    // Generating keyObject for public Key
    const public_key_object = KeyObject.from(k.publicKey);
    // printing the asymmetricKeyDetails  of public KeyObject
    console.log("public_key_object.asymmetricKeyDetails: ",
        public_key_object.asymmetricKeyDetails);
})();

輸出：

private_key_object.asymmetricKeyDetails:  { modulusLength: 2048, publicExponent: 197905n }
public_key_object.asymmetricKeyDetails:  { modulusLength: 2048, publicExponent: 197905n }

參考： https://nodejs.org/api/crypto.html#class-keyobject

相關用法

注：本文由純淨天空篩選整理自harishcarpenter大神的英文原創作品 Node.js keyObject.asymmetricKeyDetails Property。非經特殊聲明，原始代碼版權歸原作者所有，本譯文未經允許或授權，請勿轉載或複製。