35 lines
1.5 KiB
Plaintext
35 lines
1.5 KiB
Plaintext
import { JOSENotSupported } from '../util/errors.js';
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function validateCrit(Err, recognizedDefault, recognizedOption, protectedHeader, joseHeader) {
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if (joseHeader.crit !== undefined && protectedHeader.crit === undefined) {
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throw new Err('"crit" (Critical) Header Parameter MUST be integrity protected');
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}
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if (!protectedHeader || protectedHeader.crit === undefined) {
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return new Set();
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}
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if (!Array.isArray(protectedHeader.crit) ||
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protectedHeader.crit.length === 0 ||
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protectedHeader.crit.some((input) => typeof input !== 'string' || input.length === 0)) {
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throw new Err('"crit" (Critical) Header Parameter MUST be an array of non-empty strings when present');
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}
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let recognized;
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if (recognizedOption !== undefined) {
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recognized = new Map([...Object.entries(recognizedOption), ...recognizedDefault.entries()]);
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}
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else {
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recognized = recognizedDefault;
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}
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for (const parameter of protectedHeader.crit) {
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if (!recognized.has(parameter)) {
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throw new JOSENotSupported(`Extension Header Parameter "${parameter}" is not recognized`);
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}
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if (joseHeader[parameter] === undefined) {
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throw new Err(`Extension Header Parameter "${parameter}" is missing`);
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}
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else if (recognized.get(parameter) && protectedHeader[parameter] === undefined) {
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throw new Err(`Extension Header Parameter "${parameter}" MUST be integrity protected`);
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}
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}
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return new Set(protectedHeader.crit);
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}
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export default validateCrit;
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