Question

我遇到了RSA解密问题。
首先，我在openssl（OS X 10.14中为LibreSSL 2.6.4）中创建了一对公钥和私钥：

genrsa -out rsa_private_key.pem   1024
rsa -in rsa_private_key.pem -pubout -out rsa_public_key.pem

然后，我编写了用于加密和解密的函数。代码如下：


//rsa.js
const crypto = require('crypto');
exports.encrypt = (data, key) => {
  try {
    let enc = crypto.publicEncrypt(key, Buffer.from(data));
    return enc;
  } catch (error) {
    console.log('encrypt error:', error);
    return null;
  }
};

exports.decrypt = (encrypted, key) => {
  try {
    let dec = crypto.privateDecrypt({'key':key, 'padding': crypto.constants.RSA_PKCS1_OAEP_PADDING }, encrypted);
    return dec;
  } catch (error) {
    console.log('decrypt error:', error);
    return null;
  } 
};

然后我运行一个nodejs应用，该应用使用公共密钥加密字符串，然后使用私钥：


//test.js
const rsa = require('./rsa');
const rsaKeys = require('./rsaKeys');

const plainText = '111111';
const crypted = rsa.encrypt(plainText, rsaKeys.pubKey); 
const decrypted = rsa.decrypt(crypted, rsaKeys.privKey); 
console.log('crypted:', crypted.toString('base64'));
console.log('decrypted:',decrypted.toString());

它运行得很好，因为解密的正是纯文本“ 111111”。然后我错误地更改了私钥的最后3位，例如：


exports.privKey = `-----BEGIN RSA PRIVATE KEY-----
xxxxxxxxxxxxxxxxxxxxxxxxx
xxxxxxxxxxxxxxxxxxxxxxccc
-----END RSA PRIVATE KEY-----
`;

我继续运行test.js，让我惊讶的是它显示了decrypted: 111111。
后来我多次更改了最后3位，所有这些都能正确显示解密。当我更改私钥的前3位时，解密会在例外情况下运行。
我不明白为什么会出现我对cypher不太了解的结果广告。
请指出有关如何理解它的指南。

更新：添加密钥对。


exports.privKey = `-----BEGIN RSA PRIVATE KEY-----
MIICXQIBAAKBgQCWVJtkMDXP1cM6wgOW4aMlHpCg+z0o+mSUTOQwCHJ4Em0x76jm
HsNcFV9svl2KsVZmAvb3CWkNGy/+ST4cKHALMRNZ5hKNcemRH7BSHgBPTNY896Zs
0FIHClsi9J0sWC5dNdVQ02JmU2WPz9XPlVhzaELmlnJ22ecJgpDUwiZFMwIDAQAB
AoGAffe/jiBntxQkV6QjZdcE4iHOh1Z/VUsb5LjZrPYnFT47idCM8udsREkUgQaz
U3huMWTilPaptHXHrYiqJuYrm6xZsSxavsgAgoWSDTwu38PdKQ+HTrGHk6/anhXD
R/qSiS32t5EeAqvgLsxlzyyUYiaExFl/Na9seh3Acm7KMCECQQDIJmyMyBfnlFKt
cD5NTUsg2pTSgaPOmcrx8B+UMudIVzNtFRKyci/t59aPrGJml8ILBzA2QxyJ+tMg
eZdRUNjdAkEAwEdbOVl5Rol66F/NCm3ID5RxeEmVVTo7zLhxmGLSVseATWddlhtJ
iavEtzMDS7aJTDH775RwrQi3S7izWN6tTwJBAL2h0iUMi8GJAVB8UTsSaYUGNAzC
cX4UrnjNxk22cPVUUVAfsChMEec5Skuzy0Nis6GZPO+cZFTCxfg1281aaS0CQHYu
5dlYL3y1oAAYclUIqUE6Qoxm3gzmoD7y14+MnjCMq0XoVNOgrhCarWzVRB9TcQyO
ZIYbvS39/3vhaQskw20CQQCPFDSlrBvUMPJY86SG9fU38nxvKG/6HYYjjmnXeG5M
0rr9oPFSkL4pf2pXpZLtm5iNQoErWntsk9N7rYflH7xj
-----END RSA PRIVATE KEY-----
`;
exports.pubKey = `-----BEGIN PUBLIC KEY-----
MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCWVJtkMDXP1cM6wgOW4aMlHpCg
+z0o+mSUTOQwCHJ4Em0x76jmHsNcFV9svl2KsVZmAvb3CWkNGy/+ST4cKHALMRNZ
5hKNcemRH7BSHgBPTNY896Zs0FIHClsi9J0sWC5dNdVQ02JmU2WPz9XPlVhzaELm
lnJ22ecJgpDUwiZFMwIDAQAB
-----END PUBLIC KEY-----
`;

RSA使用错误的私钥成功解密

0 个答案: