@atproto/jwk/dist/jwt-decode.js

A library for working with JSON Web Keys (JWKs) in TypeScript. This is meant to be extended by environment-specific libraries like @atproto/jwk-jose.

import { ERR_JWT_INVALID, JwtVerifyError } from './errors.js';
import { jwtHeaderSchema, jwtPayloadSchema, } from './jwt.js';
import { parseB64uJson } from './util.js';
export function unsafeDecodeJwt(jwt) {
    const { 0: headerEnc, 1: payloadEnc, length } = jwt.split('.');
    if (length > 3 || length < 2) {
        throw new JwtVerifyError(undefined, ERR_JWT_INVALID);
    }
    const header = jwtHeaderSchema.parse(parseB64uJson(headerEnc));
    if (length === 2 && header?.alg !== 'none') {
        throw new JwtVerifyError(undefined, ERR_JWT_INVALID);
    }
    const payload = jwtPayloadSchema.parse(parseB64uJson(payloadEnc));
    return { header, payload };
}
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