注意： String cert通過 REST API 作為 HashMap 發送，不確定這里出了什么問題。HashMap<String, Object> extraParams = //API brings this HashMap here.String cert = (String) extraParams.get("certificate");cert = cert.replaceAll("-----BEGIN CERTIFICATE-----", ""). replaceAll("-----END CERTIFICATE-----", "").replaceAll("\r", "").replaceAll("\n", "");byte[] decodedBytes = Base64.decodeBase64(cert.getBytes("UTF-8"));X509EncodedKeySpec publicKeySpec = new X509EncodedKeySpec(decodedBytes);KeyFactory kf = KeyFactory.getInstance("RSA");PublicKey pk = kf.generatePublic(publicKeySpec);我來自原始服務器的證書字符串和我通過 API 收到的證書字符串相同，但仍然收到此錯誤，不知道為什么？java.security.spec.InvalidKeySpecException: java.security.InvalidKeyException: IOException: ObjectIdentifier() -- data isn't an object ID (tag = -96)
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慕后森
TA貢獻1802條經驗 獲得超5個贊
正如我在問題本身中提到的，我String Cert已經走過了REST HTTP，我懷疑UTF-8編碼可能是一個問題。這就是我所缺少的。下面的代碼對我來說很有魅力。部分復制自https://stackoverflow.com/a/34549537/1665592
String cert = "...";
byte[] encodedCert = cert.getBytes("UTF-8");
byte[] decodedCert = Base64.decodeBase64(encodedCert);
CertificateFactory certFactory = CertificateFactory.getInstance("X.509");
InputStream in = new ByteArrayInputStream(decodedCert);
X509Certificate certificate = (X509Certificate)certFactory.generateCertificate(in);
PublicKey publicKey = ((RSAPublicKey)certificate.getPublicKey());
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