25 lines
1009 B
Plaintext
25 lines
1009 B
Plaintext
"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.convertCOSEtoPKCS = convertCOSEtoPKCS;
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const index_js_1 = require("./iso/index.js");
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const cose_js_1 = require("./cose.js");
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/**
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* Takes COSE-encoded public key and converts it to PKCS key
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*/
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function convertCOSEtoPKCS(cosePublicKey) {
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// This is a little sloppy, I'm using COSEPublicKeyEC2 since it could have both x and y, but when
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// there's no y it means it's probably better typed as COSEPublicKeyOKP. I'll leave this for now
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// and revisit it later if it ever becomes an actual problem.
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const struct = index_js_1.isoCBOR.decodeFirst(cosePublicKey);
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const tag = Uint8Array.from([0x04]);
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const x = struct.get(cose_js_1.COSEKEYS.x);
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const y = struct.get(cose_js_1.COSEKEYS.y);
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if (!x) {
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throw new Error('COSE public key was missing x');
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}
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if (y) {
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return index_js_1.isoUint8Array.concat([tag, x, y]);
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}
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return index_js_1.isoUint8Array.concat([tag, x]);
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}
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