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chore: cleanup crypto sign fucntion

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nanov 2021-03-30 09:20:21 +03:00
parent 043caedc94
commit 6921f8d503
1 changed files with 6 additions and 9 deletions
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15
lib/crypto/Crypto.js
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@ -67,19 +67,16 @@ module.exports = class Crypto {
} }
static sign(key, msg, salt = crypto.randomBytes(32)) { static sign(key, msg, salt = crypto.randomBytes(32)) {
// console.log(key.d());
const base = new BigNumber(emsaPSS(msg, salt)); const base = new BigNumber(emsaPSS(msg, salt));
const power = new BigNumber(key.d()); const power = new BigNumber(key.d());
const mod = new BigNumber(key.n()); const mod = new BigNumber(key.n());
const buffer = modPow(base, power, mod).toBEBuffer();
//Somehow sometimes we have a 514 byte hex key that starts with "00". In that case use only the last 512 bytes if (buffer.byteLength !== 257 || buffer[0] === 0x00)
var hexString = modPow(base, power, mod).toBEBuffer().toString('hex'); return buffer.slice(1).toString('base64');
if(hexString.substr(0,2) === "00" && hexString.length == 514)
{ // console.log('hex string of key starts with "00" and is 514 bytes long, fixing it to be 512 bytes long by stripping leading "00"');
console.log("hex string of key starts with \"00\" and is 514 bytes long, fixing it to be 512 bytes long by stripping leading \"00\""); return buffer.toString('base64');
hexString = hexString.substr(2);
}
return Buffer.from(hexString, 'hex').toString('base64');
} }
static pad(d) { static pad(d) {