使用RSA算法加密公钥字符串-- Java中的无效密钥格式异常
使用RSA算法加密公钥字符串-- Java中的无效密钥格式异常
提问于 2022-02-16 17:23:45
我试图用java中的公钥使用RSA加密字符串。面对像"java.security.InvalidKeyException: invalid key format"这样的异常
部分公钥：
-----BEGIN PUBLIC KEY-----
MIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKCAgEA993qkLy6s+EL5SQ7vqmZ
LBZEV0/tc7T5x8yRJwN0WmWy2TxOnxjFuLvO2b9ai3aEe7X5a6jzl5aE99RXbo86
IB2PDH1dDN+W2IKfQViRyZE8hKRZnLH+QEbbRr3a
x/EVAnC/cObCKgjNY4jp30sCAwEAAQxxxxxxxx==
-----END PUBLIC KEY-----注意:公钥是从客户端生成和获取的。
代码：
package com.Test.in;
import java.security.KeyFactory;
import java.security.PublicKey;
import java.security.spec.X509EncodedKeySpec;
import java.util.Base64;
import javax.crypto.Cipher;
public class RSA_PublicKey {
public static final String NEW_LINE_CHARACTER = "\n";
public static final String PUBLIC_KEY_START_KEY_STRING = "-----BEGIN PUBLIC KEY-----";
public static final String PUBLIC_KEY_END_KEY_STRING = "-----END PUBLIC KEY-----";
public static final String EMPTY_STRING = "";
public static final String NEW_CR_CHARACTER = "\r";
private static final String ALGORITHM = "RSA";
public static void main(String[] args) {
String pub_Key="-----BEGIN PUBLIC KEY-----\r\n" +
"MIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKCAgEA993qkLy6s+EL5SQ7vqmZ\r\n" +
"LBZEV0/tc7T5x8yRJwN0WmWy2TxOnxjFuLvO2b9ai3aEe7X5a6jzl5aE99RXbo86\r\n" +
"IB2PDH1dDN+W2IKfQViRyZE8hKRZnLH+QEbbRr3a\r\n" +
"x/EVAnC/cObCKgjNY4jp30sCAwEAAQxxxxxxxx==\r\n" +
"-----END PUBLIC KEY-----";
pub_Key=pub_Key.replaceAll(NEW_LINE_CHARACTER, EMPTY_STRING)
.replaceAll(PUBLIC_KEY_START_KEY_STRING, EMPTY_STRING)
.replaceAll(PUBLIC_KEY_END_KEY_STRING, EMPTY_STRING).replaceAll(NEW_CR_CHARACTER, EMPTY_STRING);
byte[] publicKey = pub_Key.getBytes();
try {
byte[] encryptedData = encrypt(publicKey,
"hi this is Visruth here".getBytes());
String encryptedString = Base64.getEncoder().encodeToString(encryptedData);
System.out.println("Output encryptedString: " + encryptedString);
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
public static byte[] encrypt(byte[] publicKey, byte[] inputData)
throws Exception {
PublicKey key = KeyFactory.getInstance(ALGORITHM)
.generatePublic(new X509EncodedKeySpec(publicKey));
Cipher cipher = Cipher.getInstance(ALGORITHM);
cipher.init(Cipher.ENCRYPT_MODE, key);
byte[] encryptedBytes = cipher.doFinal(inputData);
return encryptedBytes;
}
}像下面这样面对异常。
java.security.spec.InvalidKeySpecException: java.security.InvalidKeyException: invalid key format
at sun.security.rsa.RSAKeyFactory.engineGeneratePublic(Unknown Source)
at java.security.KeyFactory.generatePublic(Unknown Source)
at com.cts.in.Test.RSA_PublicKey.encrypt(RSA_PublicKey.java:63)
at com.cts.in.Test.RSA_PublicKey.main(RSA_PublicKey.java:44)
Caused by: java.security.InvalidKeyException: invalid key format
at sun.security.x509.X509Key.decode(Unknown Source)
at sun.security.x509.X509Key.decode(Unknown Source)
at sun.security.rsa.RSAPublicKeyImpl.<init>(Unknown Source)
at sun.security.rsa.RSAKeyFactory.generatePublic(Unknown Source)
... 4 more我可以知道实现这个用例的方法(用公钥加密使用RSA的字符串)吗？
回答 1
Stack Overflow用户
回答已采纳
发布于 2022-02-17 08:18:09
根据上面的建议，我尝试删除\r，并对公钥字符串执行base64 64解码，得到加密的值。
工作守则：
package com.Test.in;
import java.security.KeyFactory;
import java.security.PublicKey;
import java.security.spec.X509EncodedKeySpec;
import java.util.Base64;
import javax.crypto.Cipher;
public class RSA_PublicKey {
public static final String NEW_LINE_CHARACTER = "\n";
public static final String PUBLIC_KEY_START_KEY_STRING = "-----BEGIN PUBLIC KEY-----";
public static final String PUBLIC_KEY_END_KEY_STRING = "-----END PUBLIC KEY-----";
public static final String EMPTY_STRING = "";
public static final String NEW_CR_CHARACTER = "\r";
private static final String ALGORITHM = "RSA";
public static String secretMessage = "Some random words in no particular order.";
public static void main(String[] args) {
String pub_Key="-----BEGIN PUBLIC KEY-----\r\n" +
"MIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKCAgEA993qkLy6s+EL5SQ7vqmZ\r\n" +
"LBZEV0/tc7T5x8yRJwN0WmWy2TxOnxjFuLvO2b9ai3aEe7X5a6jzl5aE99RXbo86\r\n" +
"IB2PDH1dDN+W2IKfQViRyZE8hKRZnLH+QEbbRr3a\r\n" +
"x/EVAnC/cObCKgjNY4jp30sCAwEAAQxxxxxxxx==\r\n" +
"-----END PUBLIC KEY-----";
pub_Key=pub_Key.replaceAll(NEW_LINE_CHARACTER, EMPTY_STRING)
.replaceAll(PUBLIC_KEY_START_KEY_STRING, EMPTY_STRING)
.replaceAll(PUBLIC_KEY_END_KEY_STRING, EMPTY_STRING)
.replaceAll(NEW_CR_CHARACTER, EMPTY_STRING);
byte[] publicKey = Base64.getDecoder().decode(pub_Key.getBytes());
try {
byte[] encryptedData = encrypt(publicKey,
secretMessage.getBytes());
String encryptedString = Base64.getEncoder().encodeToString(encryptedData);
System.out.println("Output encryptedString: " + encryptedString);
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
public static byte[] encrypt(byte[] publicKey, byte[] inputData)
throws Exception {
PublicKey key = KeyFactory.getInstance(ALGORITHM)
.generatePublic(new X509EncodedKeySpec(publicKey));
Cipher cipher = Cipher.getInstance(ALGORITHM);
cipher.init(Cipher.ENCRYPT_MODE, key);
byte[] encryptedBytes = cipher.doFinal(inputData);
return encryptedBytes;
}
}输出encryptedString：
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页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/71146486
复制相关文章
相似问题
腾讯云开发者
