зеркало из https://github.com/mozilla/gecko-dev.git
106 строки
3.0 KiB
C++
106 строки
3.0 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim:set ts=2 sw=2 sts=2 et cindent: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "cbor-cpp/src/cbor.h"
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#include "mozilla/dom/WebAuthnCBORUtil.h"
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#include "mozilla/dom/WebAuthnUtil.h"
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namespace mozilla {
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namespace dom {
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nsresult
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CBOREncodePublicKeyObj(const CryptoBuffer& aPubKeyBuf,
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/* out */ CryptoBuffer& aPubKeyObj)
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{
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mozilla::dom::CryptoBuffer xBuf, yBuf;
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nsresult rv = U2FDecomposeECKey(aPubKeyBuf, xBuf, yBuf);
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if (NS_FAILED(rv)) {
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return rv;
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}
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/*
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Public Key Object, encoded in CBOR (description is CDDL)
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pubKey = $pubKeyFmt
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pubKeyFmt /= eccPubKey
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eccPubKey = { alg: eccAlgName, x: biguint, y: biguint }
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eccAlgName = "ES256" / "ES384" / "ES512"
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*/
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cbor::output_dynamic cborPubKeyOut;
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cbor::encoder encoder(cborPubKeyOut);
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encoder.write_map(3);
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{
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encoder.write_string("alg");
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encoder.write_string(JWK_ALG_ECDSA_P_256); // Always ES256 for U2F
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encoder.write_string("x");
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encoder.write_bytes(xBuf.Elements(), xBuf.Length());
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encoder.write_string("y");
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encoder.write_bytes(yBuf.Elements(), yBuf.Length());
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}
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if (!aPubKeyObj.Assign(cborPubKeyOut.data(), cborPubKeyOut.size())) {
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return NS_ERROR_OUT_OF_MEMORY;
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}
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return NS_OK;
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}
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nsresult
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CBOREncodeAttestationObj(const CryptoBuffer& aAuthDataBuf,
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const CryptoBuffer& aAttestationCertBuf,
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const CryptoBuffer& aSignatureBuf,
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/* out */ CryptoBuffer& aAttestationObj)
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{
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/*
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Attestation Object, encoded in CBOR (description is CDDL)
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attObj = {
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authData: bytes,
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$$attStmtType
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}
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$$attStmtType //= (
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fmt: "fido-u2f",
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attStmt: u2fStmtFormat
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)
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u2fStmtFormat = {
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x5c: [ attestnCert: bytes, * (caCert: bytes) ],
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sig: bytes
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}
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*/
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cbor::output_dynamic cborAttOut;
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cbor::encoder encoder(cborAttOut);
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encoder.write_map(3);
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{
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encoder.write_string("authData");
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encoder.write_bytes(aAuthDataBuf.Elements(), aAuthDataBuf.Length());
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encoder.write_string("fmt");
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encoder.write_string("fido-u2f");
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encoder.write_string("attStmt");
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encoder.write_map(2);
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{
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encoder.write_string("x5c");
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// U2F wire protocol can only deliver 1 certificate, so it's never a chain
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encoder.write_array(1);
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encoder.write_bytes(aAttestationCertBuf.Elements(), aAttestationCertBuf.Length());
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encoder.write_string("sig");
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encoder.write_bytes(aSignatureBuf.Elements(), aSignatureBuf.Length());
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}
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}
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if (!aAttestationObj.Assign(cborAttOut.data(), cborAttOut.size())) {
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return NS_ERROR_OUT_OF_MEMORY;
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}
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return NS_OK;
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}
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}
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}
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