java - 无效 key 异常 : invalid key format in Java using RSA Keys

Question

我使用 java keygenerator 生成了一个公共(public) key :

Sun RSA public key, 1024 bits modulus: 106394877608018766537720801416655991345106535990850729605963854419450103716730599362154190537257597233014065015311499176359112816419965961469419756050290964343366687334245741905264407605904082573446954295309549250335299907317631410981650257400135070254491184426528002396792285738067623733919575203674519111607 public exponent: 65537

我从客户端发送了这个 key (通过复制、粘贴)并收到了与字符串完全相同的 key 。然后我尝试重建它:

byte [] bytes = publicKey.getBytes("UTF-8");
Key key = KeyFactory.getInstance("RSA").generatePublic(new X509EncodedKeySpec(bytes));

然后我将从函数中返回。 我从形成 key 的第 2 行收到Invalid Key Exception。

有什么想法吗？

Answer 1

您需要使用RSAPublicKeySpec

String modulus="106394877608018766537720801416655991345106535990850729605963854419450103716730599362154190537257597233014065015311499176359112816419965961469419756050290964343366687334245741905264407605904082573446954295309549250335299907317631410981650257400135070254491184426528002396792285738067623733919575203674519111607";
    RSAPublicKeySpec spec = new RSAPublicKeySpec(new BigInteger(modulus),BigInteger.valueOf(65537));

    Key key = KeyFactory.getInstance("RSA").generatePublic(spec);