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Java jwt使用公鑰字符串驗(yàn)證解析token鎖方法詳解

更新時(shí)間：2023年02月10日 10:51:42 作者：愛學(xué)習(xí)的大雄

關(guān)于java獲取Token驗(yàn)證的問(wèn)題相信很多人都遇見過(guò),尤其是對(duì)剛接觸微信開發(fā)的人來(lái)說(shuō)確實(shí)有點(diǎn)棘手,下面這篇文章主要給大家介紹了關(guān)于Java中token驗(yàn)證解析的相關(guān)資料,需要的朋友可以參考下

引言

本文主要示例如何通過(guò)已知的公鑰（字符串），來(lái)使用java-jwt校驗(yàn)token鎖。

由于java-jwt中校驗(yàn)時(shí)所需要的公鑰是RSAPublicKey對(duì)象而我們目前的公鑰是字符串，所以我們需要進(jìn)行轉(zhuǎn)化，本篇文章主要就是記錄如何進(jìn)行這個(gè)轉(zhuǎn)化

如果需要了解公鑰、私鑰的概念，請(qǐng)百度其它文章。

代碼

<!-- java-jwt -->
<dependency>
    <groupId>com.auth0</groupId>
    <artifactId>java-jwt</artifactId>
    <version>4.2.1</version>
</dependency>

/**
 * 根據(jù)公鑰字符串生成PublicKey對(duì)象
 * @return
 * @throws NoSuchAlgorithmException
 * @throws InvalidKeySpecException
 */
private static PublicKey getPublicKey()
        throws NoSuchAlgorithmException, InvalidKeySpecException {
    String pem = "MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAuWCkZn1ksPM+DBLzgaffe2je6/Kr168fDI/CAM23Ardh4+w5yprtCmNfibCLcNZ66OzPC164p4ufboc9fxXqd5mv0ZtaHGG2pATH5e7z+Gla3Bd3QX8WqJi5LkAtsdP23IQqhz8UHA+Vmd6pTzobcQBhF1K7K/zcK9QDTFon4tCxL12wSOl40CDlWnaHortvljmJ5T3zD1iPjHjpVejI5YQReqxXEuqFVTqu2nhdTWAmfX8KrlVbPGPCevruKFmNvnl09N0Kk2CZGRlLq5aE7UZxH3GOkNWKkVWMO7tUgoJK9r8v/EIrIcuO5SX7RuyyhyY0/fsx3f+CTrUATkfgVwIDAQAB";
    X509EncodedKeySpec pubKeySpec = new X509EncodedKeySpec(Base64.decodeBase64(pem));
    KeyFactory keyFactory = KeyFactory.getInstance("RSA");
    PublicKey publicKey = keyFactory.generatePublic(pubKeySpec);
    System.out.println(publicKey);
    return publicKey;
}
/**
 * 校驗(yàn)token
 * @param token
 * @return
 * @throws Exception
 */
public static DecodedJWT verifierToken(String token)throws Exception{
    //其實(shí)按照規(guī)定只需要傳遞 publicKey 來(lái)校驗(yàn)即可，這可能是auth0 的缺點(diǎn)
    Algorithm algorithm = Algorithm.RSA256((RSAPublicKey) getPublicKey(),null);
    JWTVerifier verifier = JWT.require(algorithm)
            //.withIssuer(ISSUER)
            .build(); //Reusable verifier instance 可復(fù)用的驗(yàn)證實(shí)例
    DecodedJWT jwt = verifier.verify(token);
    return jwt;
}

測(cè)試

@SpringBootTest(classes = KeycloakdemoApplication.class)
@RunWith(SpringRunner.class)
public class DemoTest {
    @Test
    public void testGetInstance() throws Exception {
        DecodedJWT verify = JWTUtils.verifierToken("eyJhbGciOiJSUzI1NiIsInR5cCIgOiAiSldUIiwia2lkIiA6ICIxdGtoMFBXanE1SmpOalVjc1hNYnJ1TldQVngtM2tQekJpekJGTDZfUDFJIn0.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.sGblDdBIkwnDDUcGd7-2QlCeA17gnmuvXosqpZ0T_zGlKtr6Ta-z1QSgwdc8K5ivekyIQmcYAIh-eHmfVxjCLKZ6fR-AdTeqenXdkNJuMREzwKpnOFx1Wq2LZUb-hqWKJimBKi2iUPlu4ENAVbFOWxcMwIedySpN74RHF3yP4BKr4YfAmr5u9CSX3EYw0LMiMVlt6l_FKNssKnTLlBq0IPDlBdwV9D1l6qpDXu_uIbvUzb_w8rnSoUGMqqqxI-RNF6m5dit29KWinFfkat5-g-lvbiVz8l0wYfMBGb9ESwC0aXJARcEG7PdhtqYLPjsGFVrjqHMq1ci_BVivAt3Htw");
        System.out.println(verify);
        System.out.println(verify.getExpiresAt());
        System.out.println(verify.getClaim("scope"));
        System.out.println(verify.getExpiresAtAsInstant());
        System.out.println(verify.getClaims());
    }
}