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@steven-tey
Created March 27, 2023 03:05
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Typescript code to verify if an incoming request's IP address is from OpenAI's CIDR block
function ipToInt(ip: string) {
return ip.split(".").reduce((acc, octet) => (acc << 8) + parseInt(octet), 0);
}
function isIpInCIDR(ip: string, cidr: string) {
const [cidrIp, prefixLength] = cidr.split("/");
const mask = -1 << (32 - parseInt(prefixLength));
const ipInt = ipToInt(ip);
const cidrIpInt = ipToInt(cidrIp);
const networkAddress = cidrIpInt & mask;
const broadcastAddress = networkAddress | ~mask;
return ipInt >= networkAddress && ipInt <= broadcastAddress;
}
export default function validChatGPTIp(ip: string) {
// verify both CIDR blocks from the docs: https://platform.openai.com/docs/plugins/production/ip-egress-ranges
return (
isIpInCIDR(ip, "23.102.140.112/28") || isIpInCIDR(ip, "23.98.142.176/28")
);
}
@itsbrex
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itsbrex commented Apr 5, 2023

Thanks for sharing this @steven-tey! 🙏

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