public static void main(String[] args) throws Exception {
RSAKeyPairGenerator rsaKeyPairGen = new RSAKeyPairGenerator();
AsymmetricCipherKeyPair keyPair = rsaKeyPairGen.generateKeyPair();
}
the rsaKeyPairGen is not null, but the generateKeyPair() method is throwing NullPointerException. What may be wrong?
rsaKeyPairGen不为null，但generateKeyPair（）方法抛出NullPointerException。可能有什么不对？
Error message:
错误信息：
java.lang.NullPointerException
at org.bouncycastle.crypto.generators.RSAKeyPairGenerator.generateKeyPair(Unknown Source)
at pkg.main(Main.java:154)
1 个解决方案
#1
3
You have to specify the bit length and the random number generator you want to use for the key (see the javadoc):
您必须指定要用于密钥的位长和随机数生成器（请参阅javadoc）：
For generating a 2048 bit RSA key:
用于生成2048位RSA密钥：
rsaKeyPairGen.init( new KeyGenerationParameters( new SecureRandom(), 2048 ) );
#1
3
You have to specify the bit length and the random number generator you want to use for the key (see the javadoc):
您必须指定要用于密钥的位长和随机数生成器（请参阅javadoc）：
For generating a 2048 bit RSA key:
用于生成2048位RSA密钥：
rsaKeyPairGen.init( new KeyGenerationParameters( new SecureRandom(), 2048 ) );