// src/utils/buffer.ts
import { sha256 } from "./crypto.js";
var equal = (a, b) => {
if (a === b) {
return true;
}
if (a.byteLength !== b.byteLength) {
return false;
}
const va = new DataView(a);
const vb = new DataView(b);
let i = va.byteLength;
while (i--) {
if (va.getUint8(i) !== vb.getUint8(i)) {
return false;
}
}
return true;
};
var constantTimeEqualString = (a, b) => {
const aLen = a.length;
const bLen = b.length;
const maxLen = Math.max(aLen, bLen);
let out = aLen ^ bLen;
for (let i = 0; i < maxLen; i++) {
const aChar = i < aLen ? a.charCodeAt(i) : 0;
const bChar = i < bLen ? b.charCodeAt(i) : 0;
out |= aChar ^ bChar;
}
return out === 0;
};
var timingSafeEqualString = async (a, b, hashFunction) => {
if (!hashFunction) {
hashFunction = sha256;
}
const [sa, sb] = await Promise.all([hashFunction(a), hashFunction(b)]);
if (sa == null || sb == null || typeof sa !== "string" || typeof sb !== "string") {
return false;
}
const hashEqual = constantTimeEqualString(sa, sb);
const originalEqual = constantTimeEqualString(a, b);
return hashEqual && originalEqual;
};
var timingSafeEqual = async (a, b, hashFunction) => {
if (typeof a === "string" && typeof b === "string") {
return timingSafeEqualString(a, b, hashFunction);
}
if (!hashFunction) {
hashFunction = sha256;
}
const [sa, sb] = await Promise.all([hashFunction(a), hashFunction(b)]);
if (!sa || !sb || typeof sa !== "string" || typeof sb !== "string") {
return false;
}
return timingSafeEqualString(sa, sb);
};
var bufferToString = (buffer) => {
if (buffer instanceof ArrayBuffer) {
const enc = new TextDecoder("utf-8");
return enc.decode(buffer);
}
return buffer;
};
var bufferToFormData = (arrayBuffer, contentType) => {
const response = new Response(arrayBuffer, {
headers: {
"Content-Type": contentType
}
});
return response.formData();
};
export {
bufferToFormData,
bufferToString,
equal,
timingSafeEqual
};
