wehub-resource-sync
05fcd08057
Deploy GitBook to 9router.github.io / build-deploy (push) Failing after 2s
42 lines
1.4 KiB
JavaScript
42 lines
1.4 KiB
JavaScript
// Claude thinking signature validation (ported from CLIProxyAPI internal/signature).
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// E-form: single-layer base64, decoded[0] == 0x12 (Claude marker).
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// R-form: double-layer base64, outer decoded[0] == 'E', inner decoded[0] == 0x12.
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// Cache prefix "...#sig" stripped before validation.
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const MAX_CLAUDE_SIGNATURE_LEN = 32 * 1024 * 1024;
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const CLAUDE_SIGNATURE_MARKER = 0x12;
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function stripCachePrefix(rawSignature) {
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const sig = (rawSignature || "").trim();
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if (!sig) return "";
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const idx = sig.indexOf("#");
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return idx >= 0 ? sig.slice(idx + 1).trim() : sig;
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}
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export function hasClaudeSignaturePrefix(rawSignature) {
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const sig = stripCachePrefix(rawSignature);
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return sig.length > 0 && (sig[0] === "E" || sig[0] === "R");
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}
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// Strict-ish: validates base64 layers + Claude marker byte.
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export function isValidClaudeSignature(rawSignature) {
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const sig = stripCachePrefix(rawSignature);
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if (!sig || sig.length > MAX_CLAUDE_SIGNATURE_LEN) return false;
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try {
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if (sig[0] === "E") {
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const decoded = Buffer.from(sig, "base64");
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return decoded.length > 0 && decoded[0] === CLAUDE_SIGNATURE_MARKER;
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}
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if (sig[0] === "R") {
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const outer = Buffer.from(sig, "base64");
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if (!outer.length || outer[0] !== 0x45) return false; // 'E'
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const inner = Buffer.from(outer.toString(), "base64");
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return inner.length > 0 && inner[0] === CLAUDE_SIGNATURE_MARKER;
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}
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return false;
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} catch {
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return false;
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}
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}
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