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| SJCL = {
str2hex(str) {
if (str === '') return '';
let arr = [];
for (let i = 0; i < str.length; i++) {
arr.push(str.charCodeAt(i).toString(16));
}
return arr.join('');
},
rightPad(str, targetLength, padChar) {
return str + Array(targetLength - str.length + 1).join(padChar);
},
getKey(pd) {
if (pd) {
const pdLen = pd.length;
if (pdLen > 32) pd = pd.slice(0, 32);
else if (pdLen > 24 && pdLen < 32) pd = pd.slice(0, 24);
else if (pdLen > 16 && pdLen < 24) pd = pd.slice(0, 16);
else if (pdLen < 16) pd = this.rightPad(pd, 16, '0');
} else {
pd = this.rightPad('', 32, '0');
}
return sjcl.codec.hex.toBits(this.str2hex(pd));
},
getRandomIv() {
const ivBits = sjcl.random.randomWords(3);
return sjcl.codec.base64.fromBits(ivBits);
},
encrypt(pd, data) {
const key = this.getKey(pd);
const iv = this.getRandomIv();
const encryptedData = sjcl.encrypt(key, JSON.stringify(data), { mode: 'gcm', ts: 128, iv });
return _.pick(JSON.parse(encryptedData), ['iv', 'ct']);
},
decrypt(pd, data) {
const key = this.getKey(pd);
const encryptedData = Object.assign(data, { mode: 'gcm', ts: 128 });
const plainText = sjcl.decrypt(key, JSON.stringify(encryptedData));
return JSON.parse(plainText);
},
}
|