export function escapeHtml(value: string): string {
return value
.replace(/&/g, "&")
.replace(//g, ">")
.replace(/"/g, """)
.replace(/'/g, "'");
}
// Replicates openpubkey's client/choosers/web_chooser.go IssuerToName().
// OPKSSH's /select handler keys its providerMap by this derived name, NOT by the
// `alias` field in config.yml. We need the same mapping so we can normalize any
// `op=` query param we receive (which can be alias, issuer with protocol, or
// issuer without protocol depending on client version) to what OPKSSH expects.
function opksshIssuerToName(issuer: string): string | null {
if (!issuer) return null;
const withScheme =
issuer.startsWith("http://") || issuer.startsWith("https://")
? issuer
: `https://${issuer}`;
if (withScheme.startsWith("https://accounts.google.com")) return "google";
if (withScheme.startsWith("https://login.microsoftonline.com"))
return "azure";
if (withScheme.startsWith("https://gitlab.com")) return "gitlab";
if (withScheme.startsWith("https://issuer.hello.coop")) return "hello";
if (withScheme.startsWith("https://")) {
const host = withScheme.slice("https://".length).split("/")[0];
return host || null;
}
return null;
}
export function normalizeSelectOpParam(
rawOp: string,
providers: Array<{ alias: string; issuer: string }>,
): string {
if (!rawOp) return rawOp;
const knownNames = new Set(
providers
.map((p) => opksshIssuerToName(p.issuer))
.filter((n): n is string => typeof n === "string" && n.length > 0),
);
if (knownNames.has(rawOp)) return rawOp;
const derivedFromRaw = opksshIssuerToName(rawOp);
if (derivedFromRaw && knownNames.has(derivedFromRaw)) return derivedFromRaw;
const matchByAlias = providers.find((p) => p.alias === rawOp);
if (matchByAlias) {
const name = opksshIssuerToName(matchByAlias.issuer);
if (name) return name;
}
return rawOp;
}
type OpksshErrorPageOptions = {
title: string;
heading: string;
message: string;
details?: string;
requestId?: string;
statusCode?: number;
};
export function renderErrorPage(opts: OpksshErrorPageOptions): string {
const title = escapeHtml(opts.title);
const heading = escapeHtml(opts.heading);
const message = escapeHtml(opts.message);
const detailsBlock = opts.details
? `${escapeHtml(opts.details)}`
: "";
const requestIdBlock = opts.requestId
? `Request ID: ${escapeHtml(opts.requestId)}
`
: "";
return `
${title}
${heading}
${message}
${detailsBlock}
${requestIdBlock}
`;
}
/**
* Points every URL in a page OPKSSH served at its proxied path, so the
* browser keeps talking to Termix instead of this server's localhost.
* `basePath` is the proxied prefix, e.g. "/plugin-api/opkssh/chooser/".
*/
export function rewriteOpksshHtml(html: string, basePath: string): string {
const localHostPattern = "(?:localhost|127\\.0\\.0\\.1)";
const attrPatterns = ["action", "href", "src", "formaction"];
for (const attr of attrPatterns) {
html = html.replace(
new RegExp(`${attr}="(/[^"]*)`, "g"),
`${attr}="${basePath}$1`,
);
html = html.replace(
new RegExp(`${attr}='(/[^']*)`, "g"),
`${attr}='${basePath}$1`,
);
}
for (const attr of ["href", "action", "src", "formaction"]) {
html = html.replace(
new RegExp(
`${attr}=["']?http:\\/\\/${localHostPattern}:\\d+\\/([^"'\\s]*)`,
"g",
),
`${attr}="${basePath}/$1`,
);
}
html = html.replace(
new RegExp(
`(window\\.location\\.href\\s*=\\s*["'])http:\\/\\/${localHostPattern}:\\d+\\/([^"']*)(["'])`,
"g",
),
`$1${basePath}/$2$3`,
);
html = html.replace(
new RegExp(
`(window\\.location\\s*=\\s*["'])http:\\/\\/${localHostPattern}:\\d+\\/([^"']*)(["'])`,
"g",
),
`$1${basePath}/$2$3`,
);
html = html.replace(
new RegExp(
`(fetch\\(["'])http:\\/\\/${localHostPattern}:\\d+\\/([^"']*)(["'])`,
"g",
),
`$1${basePath}/$2$3`,
);
html = html.replace(
new RegExp(
`(location\\.assign\\(["'])http:\\/\\/${localHostPattern}:\\d+\\/([^"']*)(["']\\))`,
"g",
),
`$1${basePath}/$2$3`,
);
html = html.replace(
new RegExp(
`(location\\.replace\\(["'])http:\\/\\/${localHostPattern}:\\d+\\/([^"']*)(["']\\))`,
"g",
),
`$1${basePath}/$2$3`,
);
// XMLHttpRequest.open("GET", "http://localhost:PORT/path", ...)
html = html.replace(
new RegExp(
`(\\.open\\(["']\\w+["']\\s*,\\s*["'])http:\\/\\/${localHostPattern}:\\d+\\/([^"']*)(["'])`,
"g",
),
`$1${basePath}/$2$3`,
);
html = html.replace(
new RegExp(
`(]+http-equiv=["']refresh["'][^>]+content=["'][^;]+;\\s*url=)http:\\/\\/${localHostPattern}:\\d+\\/([^"']+)(["'][^>]*>)`,
"gi",
),
`$1${basePath}/$2$3`,
);
html = html.replace(
new RegExp(
`(data-[\\w-]+=["'])http:\\/\\/${localHostPattern}:\\d+\\/([^"']*)(["'])`,
"g",
),
`$1${basePath}/$2$3`,
);
const baseTag = ``;
if (html.includes("]*>/i, baseTag);
} else if (html.includes("")) {
html = html.replace(//i, `${baseTag}`);
} else {
html = `${baseTag}${html}`;
}
return html;
}