JAR中的java.security.spec.InvalidKeySpecException错误不在集成开发环境中
JAR中的java.security.spec.InvalidKeySpecException错误不在集成开发环境中
提问于 2018-04-13 22:23:22
我写了一个RSA加密代码，它在集成开发环境下运行良好，但在生成JAR文件后，它给出了错误- java.security.spec.InvalidKeySpecException
private static PublicKey readPubKey()throws Exception{
//reading public key from the path specified in the configuration file
Config conf = new Config();
InputStream keyfis = conf.getFileInputStream(publicKeyPath);
byte[] encKey = new byte[keyfis.available()];
keyfis.read(encKey);
keyfis.close();
// making the instance of Public key from the bytes of the Public Key
X509EncodedKeySpec pubKeySpec = new X509EncodedKeySpec(encKey);
java.security.KeyFactory keyFactory = KeyFactory.getInstance("RSA");
//---------------problem in this line of code-----------
PublicKey publicKey = keyFactory.generatePublic(pubKeySpec);
return publicKey;
}问题就在这里-
PublicKey publicKey = keyFactory.generatePublic(pubKeySpec);异常的完整堆栈跟踪是-
Exception Caught : java.security.spec.InvalidKeySpecException:
java.security.InvalidKeyException: exponent is smaller than 3
java.security.spec.InvalidKeySpecException:
java.security.InvalidKeyException: exponent is smaller than 3
at sun.security.rsa.RSAKeyFactory.engineGeneratePublic(RSAKeyFactory.java:205)
at java.security.KeyFactory.generatePublic(KeyFactory.java:334)
at com.token.TokenVerifier.readPubKey(TokenVerifier.java:55)
at com.token.TokenVerifier.verify(TokenVerifier.java:77)
at com.test.Main.main(Main.java:28)
Caused by: java.security.InvalidKeyException: exponent is smaller than 3
at sun.security.rsa.RSAPublicKeyImpl.checkExponentRange(RSAPublicKeyImpl.java:99)
at sun.security.rsa.RSAPublicKeyImpl.<init>(RSAPublicKeyImpl.java:88)
at sun.security.rsa.RSAKeyFactory.generatePublic(RSAKeyFactory.java:298)
at sun.security.rsa.RSAKeyFactory.engineGeneratePublic(RSAKeyFactory.java:201)回答 1
Stack Overflow用户
发布于 2020-07-31 04:34:37
使用以下代码将inputstream转换为字节数组。
InputStream keyfis = conf.getFileInputStream(publicKeyPath);
byte[] encKey = toByteArray(keyfis);
keyfis .close();
public static byte[] toByteArray(InputStream in) throws IOException {
ByteArrayOutputStream os = new ByteArrayOutputStream();
byte[] buffer = new byte[1024];
int len;
// read bytes from the input stream and store them in buffer
while ((len = in.read(buffer)) != -1) {
// write bytes from the buffer into output stream
os.write(buffer, 0, len);
}
return os.toByteArray();
}请参考下面的url。感谢实用程序方法toByteArray的以下url的作者。
https://www.techiedelight.com/convert-inputstream-byte-array-java/
如果你在同一个程序中验证签名，请在验证签名之前使用相同的方法转换为字节数组，否则也会在那里给出错误。
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原文链接：
https://stackoverflow.com/questions/49819211
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