他给了我一个测试公钥
MIGAMA0GCSqGSIb3DQEBAQUAA28AMGwCZQCeh0LCZFTcyDINybUavJb-d0sMTMv5-xGDcGmJq38cwtij3n-bFl_qpX2lgN516bGnqZC0-kt-RkmWitXSNj-1yLu4hg1SNy-HfHuvFWulDLpDgt-JOflfCH9cMUZxbOWhf6IlAgMBAAE
不知道经过了什么,我用 php 怎么都读不了这个公钥
下面是文档里面给的 java demo,一直转不成 php 版本的
package com.xxtx.common.util;
import org.apache.commons.codec.binary.Base64;
import org.apache.commons.io.IOUtils;
import javax.crypto.Cipher;
import java.io.ByteArrayOutputStream;
import java.security.*;
import java.security.interfaces.RSAPrivateKey;
import java.security.interfaces.RSAPublicKey;
import java.security.spec.InvalidKeySpecException;
import java.security.spec.PKCS8EncodedKeySpec;
import java.security.spec.X509EncodedKeySpec;
import java.util.HashMap;
import java.util.Map;
public class RSAUtils {
public static final String CHARSET = "UTF-8";
public static final String RSA_ALGORITHM = "RSA"; // ALGORITHM ['?lg?r??(?)m] 算法的意思
public static Map<String, String>createKeys(int keySize) {
// 为 RSA 算法创建一个 KeyPairGenerator 对象
KeyPairGenerator kpg;
try {
kpg = KeyPairGenerator.getInstance(RSA_ALGORITHM);
} catch (NoSuchAlgorithmException e) {
throw new IllegalArgumentException("No such algorithm-->["+ RSA_ALGORITHM + "]");
}
// 初始化 KeyPairGenerator 对象,密钥长度
kpg.initialize(keySize);
// 生成密匙对
KeyPair keyPair = kpg.generateKeyPair();
// 得到公钥
Key publicKey = keyPair.getPublic();
String publicKeyStr = Base64.encodeBase64URLSafeString(publicKey.getEncoded());
// 得到私钥
Key privateKey = keyPair.getPrivate();
String privateKeyStr = Base64.encodeBase64URLSafeString(privateKey.getEncoded());
// map 装载公钥和私钥
Map<String, String> keyPairMap = new HashMap<String, String>();
keyPairMap.put("publicKey", publicKeyStr);
keyPairMap.put("privateKey", privateKeyStr);
// 返回 map
return keyPairMap;
}
/**
* 得到公钥
* @param publicKey 密钥字符串(经过 base64 编码)
* @throws Exception
*/
public static RSAPublicKey getPublicKey(String publicKey) throws NoSuchAlgorithmException, InvalidKeySpecException {
// 通过 X509 编码的 Key 指令获得公钥对象
KeyFactory keyFactory = KeyFactory.getInstance(RSA_ALGORITHM);
X509EncodedKeySpec x509KeySpec = new X509EncodedKeySpec(Base64.decodeBase64(publicKey));
RSAPublicKey key = (RSAPublicKey) keyFactory.generatePublic(x509KeySpec);
return key;
}
/**
* 得到私钥
* @param privateKey 密钥字符串(经过 base64 编码)
* @throws Exception
*/
public static RSAPrivateKey getPrivateKey(String privateKey) throws NoSuchAlgorithmException, InvalidKeySpecException {
// 通过 PKCS#8 编码的 Key 指令获得私钥对象
KeyFactory keyFactory = KeyFactory.getInstance(RSA_ALGORITHM);
PKCS8EncodedKeySpec pkcs8KeySpec = new PKCS8EncodedKeySpec(Base64.decodeBase64(privateKey));
RSAPrivateKey key = (RSAPrivateKey) keyFactory.generatePrivate(pkcs8KeySpec);
return key;
}
/**
* 公钥加密
* @param data
* @param publicKey
* @return
*/
public static String publicEncrypt(String data, RSAPublicKey publicKey) {
try {
Cipher cipher = Cipher.getInstance(RSA_ALGORITHM);
cipher.init(Cipher.ENCRYPT_MODE, publicKey);
return Base64.encodeBase64URLSafeString(rsaSplitCodec(cipher, Cipher.ENCRYPT_MODE, data.getBytes(CHARSET), publicKey.getModulus().bitLength()));
} catch (Exception e) {
throw new RuntimeException("加密字符串["+ data + "]时遇到异常", e);
}
}
/**
* 私钥解密
* @param data
* @param privateKey
* @return
*/
public static String privateDecrypt(String data, RSAPrivateKey privateKey) {
try {
Cipher cipher = Cipher.getInstance(RSA_ALGORITHM);
cipher.init(Cipher.DECRYPT_MODE, privateKey);
return new String(rsaSplitCodec(cipher, Cipher.DECRYPT_MODE, Base64.decodeBase64(data), privateKey.getModulus().bitLength()), CHARSET);
} catch (Exception e) {
throw new RuntimeException("解密字符串["+ data + "]时遇到异常", e);
}
}
/**
* 私钥加密
* @param data
* @param privateKey
* @return
*/
public static String privateEncrypt(String data, RSAPrivateKey privateKey) {
try {
Cipher cipher = Cipher.getInstance(RSA_ALGORITHM);
//每个 Cipher 初始化方法使用一个模式参数 opmod,并用此模式初始化 Cipher 对象。此外还有其他参数,包括密钥 key 、包含密钥的证书 certificate 、算法参数 params 和随机源 random 。
cipher.init(Cipher.ENCRYPT_MODE, privateKey);
return Base64.encodeBase64URLSafeString(rsaSplitCodec(cipher, Cipher.ENCRYPT_MODE, data.getBytes(CHARSET), privateKey.getModulus().bitLength()));
} catch (Exception e) {
throw new RuntimeException("加密字符串["+ data + "]时遇到异常", e);
}
}
/**
* 公钥解密
* @param data
* @param publicKey
* @return
*/
public static String publicDecrypt(String data, RSAPublicKey publicKey) {
try {
Cipher cipher = Cipher.getInstance(RSA_ALGORITHM);
cipher.init(Cipher.DECRYPT_MODE, publicKey);
return new String(rsaSplitCodec(cipher, Cipher.DECRYPT_MODE, Base64.decodeBase64(data), publicKey.getModulus().bitLength()), CHARSET);
} catch (Exception e) {
throw new RuntimeException("解密字符串["+ data + "]时遇到异常", e);
}
}
//rsa 切割解码 , ENCRYPT_MODE,加密数据 ,DECRYPT_MODE,解密数据
private static byte[] rsaSplitCodec(Cipher cipher, int opmode, byte[] datas, int keySize) {
int maxBlock = 0; //最大块
if (opmode == Cipher.DECRYPT_MODE) {
maxBlock = keySize / 8;
} else {
maxBlock = keySize / 8 - 11;
}
ByteArrayOutputStream out = new ByteArrayOutputStream();
int offSet = 0;
byte[] buff;
int i = 0;
try {
while (datas.length > offSet) {
if (datas.length - offSet > maxBlock) {
//可以调用以下的 doFinal ()方法完成加密或解密数据:
buff = cipher.doFinal(datas, offSet, maxBlock);
} else {
buff = cipher.doFinal(datas, offSet, datas.length - offSet);
}
out.write(buff, 0, buff.length);
i++;
offSet = i * maxBlock;
}
} catch (Exception e) {
throw new RuntimeException("加解密阀值为["+ maxBlock + "]的数据时发生异常", e);
}
byte[] resultDatas = out.toByteArray();
IOUtils.closeQuietly(out);
return resultDatas;
}
}
1
kangsgo OP 我试了一下 base64 解密这个公钥,好像也解密不出来
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2
sujin190 2021-10-10 18:25:00 +08:00
自己组一下 pem 文件格式呗,网上查一下就有吧,php 好像读取的是这种格式吧,确实是不需要自己解码 base64 的
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3
keyfunc 2021-10-10 18:27:27 +08:00
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5
kangsgo OP |
6
eason1874 2021-10-10 18:46:50 +08:00 2
因为这个不是标准的 base64,需要先转换成标准 base64,看你这么久没解决,给你写个例子
``` <?php $str = 'MIGAMA0GCSqGSIb3DQEBAQUAA28AMGwCZQCeh0LCZFTcyDINybUavJb-d0sMTMv5-xGDcGmJq38cwtij3n-bFl_qpX2lgN516bGnqZC0-kt-RkmWitXSNj-1yLu4hg1SNy-HfHuvFWulDLpDgt-JOflfCH9cMUZxbOWhf6IlAgMBAAE'; function urlsafe_b64decode($string) { $data = str_replace(array('-','_'),array('+','/'),$string); $mod4 = strlen($data) % 4; if ($mod4) { $data .= substr('====', $mod4); } return base64_decode($data); } // 转为标准 base64 $str = urlsafe_b64decode($str); // 封装 $pub_key = "-----BEGIN PUBLIC KEY-----\n" . base64_encode($str) . "\n-----END PUBLIC KEY-----"; // 解析证书,用于后续加解密等操作 $pub_key_res = openssl_get_publickey($pub_key); // 读取证书信息 var_dump(openssl_pkey_get_details($pub_key_res)); // 加密例子,输出 base64 格式 openssl_public_encrypt("hello", $crypttext, $pub_key); var_dump(base64_encode($crypttext)); ``` |
7
sarvatathagata 2021-10-10 18:49:29 +08:00
这代码挺有意思的啊
"// ALGORITHM ['?lg?r??(?)m] 算法的意思" “阀值” |
8
eason1874 2021-10-10 18:56:15 +08:00 2
顺便一提,处理 base64 内容,第一件事先看格式对不对,很多接受 base64 格式的输入只能接受标准 base64
标准 base64 只有 + / = 三个符号,有 - _ 这种符号的是 base64 变体,通常用来兼容 URL,因为默认符号作为网址时被转义 |