title: 【小程式】RSA簽名
type: categories
date: 2017-05-27 17:01:15
categories: 小程式

tags: [RSA, 簽名]

一個適用於微信小程式的RSA簽名加密庫。

使用

1、引入檔案

var RSA = require('../../utils/wxapp_rsa.js')

2、呼叫

var privateKey_pkcs1 = '-----BEGIN RSA PRIVATE KEY-----MIICXQIBAAKBgQCk7WKdggwBOtteLL5sPom8RYCjuw0hy6R1jH39tCaep1Dns02bi4CYHk2dSR / t0ABgF5pHYeMxHa74Dp6Z6SjfAKMUu53BbTR615ehK + 03BjtzJzviTF1 / NtLmGaR3aawrDp7oQgq33dfIYbWLuAMkHNiWaoXaGyHh3a8jS2vxfQIDAQABAoGAIKRnLzts + tVWU5ZRfgUGp7 + tzToZSEYQ378VtJ / yQNZmueUQCCgdJH5i6C1v51aSrHIfc99Y4wC3/ 5qNI3M1RlRpIakmcaiEv1m6huDPLKFq6Y1e+ AZ0Cb0xo3bny + VTOvfGgcAdSa6++K47bGaxyKzwGeNZQkltm5sgbVcKvkECQQDVjWbSU8P8nDb+TP5Aqr + DaMVA425wv2ra2jhxd6KqKxgHHB7yYWlODiYNrtALOEG9zfSpHVQWhZpiKq8XcWwRAkEAxbWzPAqZxaZ / XTs65uCL0 + iqif0qCSDUNis61wYm2UwOh4LqBZIFop94B3ybEXbCvUl0v26H0fgXjFUErvlKrQJBAKjbAe5U5accLi + t2WxwlrXlZfME4hKsiGU8H10455n+ MSWOCrpEY + ugLF6tVztH5FOcQlRmKFMWmRf + ACxdNsECQDBjkEKZtZkSbwm6fWgUfSSYRWUQeUFSr52yZuxJrShx3Px9phlG6 + opbY8niCx2DKOXXuObgdJ6DglipYrNqOECQQCndP + zU / jwlvjQzEabKdP05uFc5JV6ySFBQwuoENbEvW3uz + Yz31xDYbrwIzrysVDovlj0ExL6LC + JRvpJmHcN-----END RSA PRIVATE KEY-----'
 

    var publicKey_pkcs1 = '-----BEGIN PUBLIC KEY-----MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCk7WKdggwBOtteLL5sPom8RYCjuw0hy6R1jH39tCaep1Dns02bi4CYHk2dSR / t0ABgF5pHYeMxHa74Dp6Z6SjfAKMUu53BbTR615ehK + 03BjtzJzviTF1/ NtLmGaR3aawrDp7oQgq33dfIYbWLuAMkHNiWaoXaGyHh3a8jS2vxfQIDAQAB-----END PUBLIC KEY-----'

    // 加簽
 

    var sign_rsa = new RSA.RSAKey(); 
    sign_rsa = RSA.KEYUTIL.getKey(privateKey_pkcs1); 
    console.log('簽名RSA:')
    console.log(sign_rsa)
    var hashAlg = 'sha1';
    var hSig = sign_rsa.signString("signData", hashAlg); 
    hSig = RSA.hex2b64(hSig); // hex 轉 b64
    console.log("簽名結果：" + hSig)

    // 驗籤
 

    var verify_rsa = new RSA.RSAKey();
    verify_rsa = RSA.KEYUTIL.getKey(publicKey_pkcs1);
    console.log('驗籤RSA:')
    console.log(verify_rsa)
    hSig = RSA.b64tohex(hSig)
    var ver = verify_rsa.verifyString("signData", hSig) 
    console.log('驗簽結果：' + ver)

    // 加密
    var encrypt_rsa = new RSA.RSAKey();
    encrypt_rsa = RSA.KEYUTIL.getKey(publicKey_pkcs1);
    console.log('加密RSA:')
    console.log(encrypt_rsa)
    var encStr = encrypt_rsa.encrypt('123456')
    encStr = RSA.hex2b64(encStr);
    console.log("加密結果：" + encStr)

    // 解密
    var decrypt_rsa = new RSA.RSAKey();
    decrypt_rsa = RSA.KEYUTIL.getKey(privateKey_pkcs1);
    console.log('解密RSA:')
    console.log(decrypt_rsa)
    encStr = RSA.b64tohex(encStr)
    var decStr = decrypt_rsa.decrypt(encStr)
    console.log("解密結果：" + decStr)

需要注意的是：區分RSA私鑰的型別，有pkcs1和pkcs8。pkcs8格式的私鑰主要用於java中。

// pkcs1格式：
-----BEGIN RSA PRIVATE KEY-----
-----END RSA PRIVATE KEY------

// pkcs8格式：
-----BEGIN PRIVATE KEY-----
-----END PRIVATE KEY-----