61 lines
2.6 KiB
JavaScript
Executable file
61 lines
2.6 KiB
JavaScript
Executable file
"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.verifyTLogSET = void 0;
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/*
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Copyright 2023 The Sigstore Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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const core_1 = require("@sigstore/core");
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const error_1 = require("../error");
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const trust_1 = require("../trust");
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// Verifies the SET for the given entry against the list of trusted
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// transparency logs. Returns true if the SET can be verified against at least
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// one of the trusted logs; otherwise, returns false.
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function verifyTLogSET(entry, tlogs) {
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// Filter the list of tlog instances to only those which might be able to
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// verify the SET
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const validTLogs = (0, trust_1.filterTLogAuthorities)(tlogs, {
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logID: entry.logId.keyId,
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targetDate: new Date(Number(entry.integratedTime) * 1000),
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});
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// Check to see if we can verify the SET against any of the valid tlogs
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const verified = validTLogs.some((tlog) => {
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// Re-create the original Rekor verification payload
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const payload = toVerificationPayload(entry);
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// Canonicalize the payload and turn into a buffer for verification
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const data = Buffer.from(core_1.json.canonicalize(payload), 'utf8');
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// Extract the SET from the tlog entry
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const signature = entry.inclusionPromise.signedEntryTimestamp;
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return core_1.crypto.verify(data, tlog.publicKey, signature);
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});
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if (!verified) {
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throw new error_1.VerificationError({
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code: 'TLOG_INCLUSION_PROMISE_ERROR',
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message: 'inclusion promise could not be verified',
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});
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}
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}
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exports.verifyTLogSET = verifyTLogSET;
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// Returns a properly formatted "VerificationPayload" for one of the
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// transaction log entires in the given bundle which can be used for SET
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// verification.
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function toVerificationPayload(entry) {
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const { integratedTime, logIndex, logId, canonicalizedBody } = entry;
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return {
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body: canonicalizedBody.toString('base64'),
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integratedTime: Number(integratedTime),
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logIndex: Number(logIndex),
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logID: logId.keyId.toString('hex'),
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};
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}
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