前端使用jsencrypt进行RSA公钥解密

默认jsencrypt是不支持公钥解密的，需要更改
1.将jsencrypt.js源码复制一分到utils包下

2.然后对utils包下的jsencrypt进行更改

更改RSAKey.prototype.decrypt 方法（将doPrivate改为doPublic）

RSAKey.prototype.decrypt = function (ctext) { var c = parseBigInt(ctext, 16); var m = this.doPublic(c); if (m == null) { return null; } return pkcs1unpad2(m, (this.n.bitLength() + 7) >> 3); };

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原：

新：

更改pkcs1unpad2方法，更换内容如下：

function pkcs1unpad2(d, n) { var b = d.toByteArray() var i = 0 while (i < b.length && b[i] === 0) { ++i } // if (b.length - i !== n - 1 || b[i] !== 2) { // return null // } ++i while (b[i] !== 0) { if (++i >= b.length) { return null } } var ret = '' while (++i < b.length) { var c = b[i] & 255 if (c < 128) { // utf-8 decode ret += String.fromCharCode(c) } else if ((c > 191) && (c < 224)) { ret += String.fromCharCode(((c & 31) << 6) | (b[i + 1] & 63)) ++i } else { ret += String.fromCharCode(((c & 15) << 12) | ((b[i + 1] & 63) << 6) | (b[i + 2] & 63)) i += 2 } } return ret }

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原：

新：

3. 实际使用：
import JSEncrypt from '@/utils/jsencrypt'

var encryptor = new JSEncrypt(); // 私钥加密后的数据 var data = 'fGrPg4EOup/nopw4f8XCqNenVsPE2Ujr70TvjDvrfUDFFiYcx7ewLG7tM76x7N0nKiO7/QiWZU0GAEhrMBr4oNm+zGCiCnMGeLaPUM0KOnYgN6kimFsMOIerd/25S3qdqj4qED84bTaT7VBni1L3APo8JOKVcWIk4kJPKK1nJUNwsQxJvbrD2+nOdrWjRuq3WIftdcEHBiVGycai+j8QUrVTKcTmYFjCWwC7JFRQjYv26pmCbq3rs3CT24xazc4CLDkx+y98H++my7zZkVTI675kH+pYlZbQfBkiHvLtCHUOEi+RDXhGNi9GO2DVTBVnAP173BV2VyFFYj85qeD/Qw=='; // 公钥 var publicKey = '-----BEGIN PUBLIC KEY-----\n' + 'MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA3IHVdOJg+nqaZGKc9wXJ'+ 'KUqwI95F/qCvPQoDyf0cDZzebbAGEOs4m7LAQwfa6A+q6cRhBHtDYco6cv7wufmi'+ 'qJ9U7yVFnvha1wi3jkXn1AxUAvUw+bLtrhjZg/akxAukXX7fsOdCPbk8AitlnaH1'+ '2S5Np0Ugxx/rN+LOkkxwAOIzu/z1SvGLoPGFDHW/7mna8txs3SwlpG3TDGOXOsEu'+ '4vcXbRKmLApUlrluhny7GTGGVi8TqrmviyrfcAj/098AI5aRzv/Y0TchsJVOtoaz'+ 'CsHjjp/Cf4RnSuL+KyBio7wGlR+Iyy/ywpMUiae3vJb3qd0Wx8824SbgClTIA1f4'+ 'HwIDAQAB'+ '\n-----END PUBLIC KEY-----'; // console.log("111",decrypt(data,publicKey)); encryptor.setPublicKey(publicKey); var decryptedData = encryptor.decrypt(data,publicKey); // 显示解密结果 console.log("解密：",decryptedData);

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