啊哈！
诀窍是使用Bouncycastle的pem处理类。这是一个工作示例：
import org.bouncycastle.openssl.jcajce.JcaPEMWriter;
import java.io.File;
import java.io.FileWriter;
import java.security.KeyPairGenerator;
import java.security.SecureRandom;
public class Main
{
public static final int KEY_LENGTH = 2048;
public static void main(String[] args) throws Exception
{
SecureRandom random = SecureRandom.getInstance("SHA1PRNG", "SUN");
random.nextBytes(new byte[]{}); //toss out the first result to ensure it seeds randomly from the system.
KeyPairGenerator keyGen = KeyPairGenerator.getInstance("RSA");
keyGen.initialize(KEY_LENGTH, random);
java.security.KeyPair keyPair = keyGen.genKeyPair();
System.out.println("public format: " + keyPair.getPublic().getFormat());
System.out.println("public algorithm: " + keyPair.getPublic().getAlgorithm());
System.out.println("private format: " + keyPair.getPrivate().getFormat());
System.out.println("private algorithm: " + keyPair.getPrivate().getAlgorithm());
JcaPEMWriter writer = null;
File keyDir = new File("C:/misc/test_key");
try
{
writer = new JcaPEMWriter(new FileWriter(new File(keyDir, "private_bc.pem")));
writer.writeObject(keyPair.getPrivate());
}
finally
{
if(writer != null)
writer.close();
}
}
}
Puttygen无需投诉即可打开生成的私钥！
602392714
清零编程群