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import { createHash, randomBytes } from "crypto";
import * as bcrypt from "bcryptjs";
import { apiKeys } from "@karakeep/db/schema";
import serverConfig from "@karakeep/shared/config";
import type { Context } from "./index";
const BCRYPT_SALT_ROUNDS = 10;
const API_KEY_PREFIX_V1 = "ak1";
const API_KEY_PREFIX_V2 = "ak2";
export function generatePasswordSalt() {
return randomBytes(32).toString("hex");
}
export async function generateApiKey(
name: string,
userId: string,
database: Context["db"],
) {
const id = randomBytes(10).toString("hex");
const secret = randomBytes(16).toString("hex");
const secretHash = createHash("sha256").update(secret).digest("base64");
const plain = `${API_KEY_PREFIX_V2}_${id}_${secret}`;
const key = (
await database
.insert(apiKeys)
.values({
name: name,
userId: userId,
keyId: id,
keyHash: secretHash,
})
.returning()
)[0];
return {
id: key.id,
name: key.name,
createdAt: key.createdAt,
key: plain,
};
}
function parseApiKey(plain: string) {
const parts = plain.split("_");
if (parts.length != 3) {
throw new Error(
`Malformd API key. API keys should have 3 segments, found ${parts.length} instead.`,
);
}
if (parts[0] !== API_KEY_PREFIX_V1 && parts[0] !== API_KEY_PREFIX_V2) {
throw new Error(`Malformd API key. Got unexpected key prefix.`);
}
return {
version: parts[0] == API_KEY_PREFIX_V1 ? (1 as const) : (2 as const),
keyId: parts[1],
keySecret: parts[2],
};
}
export async function authenticateApiKey(key: string, database: Context["db"]) {
const { version, keyId, keySecret } = parseApiKey(key);
const apiKey = await database.query.apiKeys.findFirst({
where: (k, { eq }) => eq(k.keyId, keyId),
with: {
user: true,
},
});
if (!apiKey) {
throw new Error("API key not found");
}
const hash = apiKey.keyHash;
let validation = false;
switch (version) {
case 1:
validation = await bcrypt.compare(keySecret, hash);
break;
case 2:
validation =
createHash("sha256").update(keySecret).digest("base64") == hash;
break;
default:
throw new Error("Invalid API Key");
}
if (!validation) {
throw new Error("Invalid API Key");
}
return apiKey.user;
}
export async function hashPassword(password: string, salt: string | null) {
return await bcrypt.hash(password + (salt ?? ""), BCRYPT_SALT_ROUNDS);
}
export async function validatePassword(
email: string,
password: string,
database: Context["db"],
) {
if (serverConfig.auth.disablePasswordAuth) {
throw new Error("Password authentication is currently disabled");
}
const user = await database.query.users.findFirst({
where: (u, { eq }) => eq(u.email, email),
});
if (!user) {
// Run a bcrypt comparison anyways to hide the fact of whether the user exists or not (protecting against timing attacks)
await bcrypt.compare(
password +
"b6bfd1e907eb40462e73986f6cd628c036dc079b101186d36d53b824af3c9d2e",
"a-dummy-password-that-should-never-match",
);
throw new Error("User not found");
}
if (!user.password) {
throw new Error("This user doesn't have a password defined");
}
const validation = await bcrypt.compare(
password + (user.salt ?? ""),
user.password,
);
if (!validation) {
throw new Error("Wrong password");
}
return user;
}
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