Java 生成 RSA 密钥对并将私有编码为字符串
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时间：2020-08-12 21:46:45 来源:igfitidea点击:
Generate RSA key pair and encode private as string
提问by Angela
I want to generate 512 bit RSA keypair and then encode my public key as a string. How can I achieve this?
我想生成 512 位 RSA 密钥对，然后将我的公钥编码为字符串。我怎样才能做到这一点？
采纳答案by jitter
For output as Hex-String
输出为十六进制字符串
import java.security.*;
public class Test {
public static void main(String[] args) throws NoSuchAlgorithmException, NoSuchProviderException {
KeyPairGenerator keyGen = KeyPairGenerator.getInstance("RSA");
keyGen.initialize(512);
byte[] publicKey = keyGen.genKeyPair().getPublic().getEncoded();
StringBuffer retString = new StringBuffer();
for (int i = 0; i < publicKey.length; ++i) {
retString.append(Integer.toHexString(0x0100 + (publicKey[i] & 0x00FF)).substring(1));
}
System.out.println(retString);
}
}
For output as byte values
输出为字节值
import java.security.*;
public class Test {
public static void main(String[] args) throws NoSuchAlgorithmException, NoSuchProviderException {
KeyPairGenerator keyGen = KeyPairGenerator.getInstance("RSA");
keyGen.initialize(512);
byte[] publicKey = keyGen.genKeyPair().getPublic().getEncoded();
StringBuffer retString = new StringBuffer();
retString.append("[");
for (int i = 0; i < publicKey.length; ++i) {
retString.append(publicKey[i]);
retString.append(", ");
}
retString = retString.delete(retString.length()-2,retString.length());
retString.append("]");
System.out.println(retString); //e.g. [48, 92, 48, .... , 0, 1]
}
}
