我正在寻找下面提到的NodeJS(javascript)中的编码实现。
import base64
def encode(key, string):
encoded_chars = []
for i in xrange(len(string)):
key_c = key[i % len(key)]
encoded_c = chr(ord(string[i]) + ord(key_c) % 256)
encoded_chars.append(encoded_c)
encoded_string = "".join(encoded_chars)
return base64.urlsafe_b64encode(encoded_string)
我从Simple way to encode a string according to a password?那里得到了
答案 0 :(得分:0)
这是解决方案,使用秘密字符串进行编码和解码。
const encode = (secret, plaintext) => {
const enc = [];
for (let i = 0; i < plaintext.length; i += 1) {
const keyC = secret[i % secret.length];
const encC = `${String.fromCharCode((plaintext[i].charCodeAt(0) + keyC.charCodeAt(0)) % 256)}`;
enc.push(encC);
}
const str = enc.join('');
return Buffer.from(str, 'binary').toString('base64');
};
const decode = (secret, ciphertext) => {
const dec = [];
const enc = Buffer.from(ciphertext, 'base64').toString('binary');
for (let i = 0; i < enc.length; i += 1) {
const keyC = secret[i % secret.length];
const decC = `${String.fromCharCode((256 + enc[i].charCodeAt(0) - keyC.charCodeAt(0)) % 256)}`;
dec.push(decC);
}
return dec.join('');
};
console.log('result encode:', encode('abcd56&r#iu)=', '122411353520'));
console.log('result decode:', decode('abcd56&r#iu)=', 'kpSVmGZnWadWnqdZ'));