无法使用 x5c (x509) 公共证书验证 JWT

Question

更新我正在尝试使用下面的 x5c / x509 公钥值以编程方式验证 JWT 访问令牌。我可以通过将令牌和 x5c 值插入外部网站来实现此功能，但不能使用 JavaScript / jsrsasign 以编程方式进行。任何建议将不胜感激。

以下是 OIDC 提供商的公共 JSON Web 密钥集。

    {
        "keys": [
            {
                "kty": "RSA",
                "kid": "server",
                "use": "sig",
                "alg": "RS256",
                "n": "gLZO9w1OT_SWO-KbqiU0k3HevHggiY70XbDqgE1YaqhD-MwFUWNudExzF3oB28NYWYg5v6CJY0F-pUNtgukDM6ARDlh0n4xIvBRlnUnCTCx7pYOjpfXbTv49tlXmh4-ddh8EeQBLrF92u5UYs0tnZd8843mvYWohUNH1X1hM08-hpk7xCiy4XdwbeSlH757D2d5E0J0dGtZ744-dB2ZRCw2Vms_mk4Yyny4ifx2j2gIhikbb7WGmsTR2sWrtuhgZ_EBNUvrD0O54xbhQNTTFQ1pi9UZxo_gYc5Gp5fLcSOK6SDBKXbDS5hhy1vFyoa0xdgFv-xpem7YzmkKqzfjC9w",
                "e": "AQAB",
                "x5c": [
                    "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"
                ],
                "x5t#S256": "nTAGJuFFrm-vNBdkLVNmuePwTmlXr0T87IppgJPRT9k"
            }
        ]
    }

这是我用来通过 x5c 验证访问令牌的代码。我的印象是我应该使用 x5c 值，但如果有其他方法对我来说没问题。只需要使用键下的上述值来验证令牌即可。

// break line every 64 characters.

x5cValue = x5cValue.replace(/(.{64})/g, "$1\n");

// base64 decode

var x5cValueAtob = atob(x5cValue);

// Add Begin / END certificate

x5cValue = "-----BEGIN CERTIFICATE-----\n" + x5cValueAtob + "\n-----END CERTIFICATE-----";

var decoded = KJUR.jws.JWS.verify(accessTokenJson, rawContent, ["RS256"]);

我应该在 Base64 解码之前/之后将 BEGIN / END PUBLIC KEY 字符串添加到 x5c 值吗？是的，感谢亚当

在验证之前我需要处理 x5c 值吗？

返回的响应 - 解码： false

先感谢您。

Answer 1

我花了一天的时间挠头终于让它工作了

public static PublicKey getPublicKey(String x5c) throws CertificateException, IOException {
    System.out.println(" x5c ="+x5c);
    String stripped = x5c.replaceAll("-----BEGIN (.*)-----", "");
    stripped = stripped.replaceAll("-----END (.*)----", "");
    stripped = stripped.replaceAll("\r\n", "");
    stripped = stripped.replaceAll("\n", "");
    stripped.trim();
    System.out.println(" stripped ="+stripped);
    byte[] keyBytes = Base64.decode(stripped);
    CertificateFactory fact = CertificateFactory.getInstance("X.509");
    X509Certificate cer = (X509Certificate) fact.generateCertificate(new ByteArrayInputStream(keyBytes));
    return cer.getPublicKey();

}