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Updated Access Token decryption function

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This commit is contained in:
jay.poff@outlook.com
2021-10-14 19:38:02 -05:00
parent 7037d87948
commit 2457829f05
1 changed files with 24 additions and 13 deletions
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37
src/authentication.js
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@@ -147,12 +147,18 @@ let methods = {
}
});
const cryptoConfig = token.subarray(0, 0x90);
const signature = token.subarray(0x90, 0xA4);
const encryptedBody = token.subarray(0xA4);
const cryptoConfig = token.subarray(0, 0x82);
const signature = token.subarray(0x82, 0x96);
const encryptedBody = token.subarray(0x96);
const encryptedAESKey = cryptoConfig.subarray(0, 128);
const iv = cryptoConfig.subarray(128);
const point1 = cryptoConfig.readInt8(0x80);
const point2 = cryptoConfig.readInt8(0x81);
const iv = Buffer.concat([
Buffer.from(encryptedAESKey.subarray(point1, point1 + 8)),
Buffer.from(encryptedAESKey.subarray(point2, point2 + 8))
]);
const decryptedAESKey = privateKey.decrypt(encryptedAESKey);
@@ -160,12 +166,15 @@ let methods = {
let decryptedBody = decipher.update(encryptedBody);
decryptedBody = Buffer.concat([decryptedBody, decipher.final()]);
const hmac = crypto.createHmac('sha1', cryptoOptions.hmac_secret).update(decryptedBody);
const calculatedSignature = hmac.digest();
if (!calculatedSignature.equals(signature)) {
if (calculatedSignature !== signature) {
console.log('Token signature did not match');
return null;
}
return decryptedBody;
},
processPainting: async function (painting, isTGA) {
@@ -205,15 +214,17 @@ let methods = {
}
},
nintendoPasswordHash: function(password, pid) {
const pidBuffer = Buffer.alloc(4);
pidBuffer.writeUInt32LE(pid);
const pidBuffer = Buffer.alloc(4);
pidBuffer.writeUInt32LE(pid);
const unpacked = Buffer.concat([
pidBuffer,
Buffer.from('\x02\x65\x43\x46'),
Buffer.from(password)
]);
return crypto.createHash('sha256').update(unpacked).digest().toString('hex');
const unpacked = Buffer.concat([
pidBuffer,
Buffer.from('\x02\x65\x43\x46'),
Buffer.from(password)
]);
const hashed = crypto.createHash('sha256').update(unpacked).digest().toString('hex');
return hashed;
},
getCommunityHash: function() {
return communityMap;