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122 lines
4.5 KiB
C++
122 lines
4.5 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This code is made available to you under your choice of the following sets
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* of licensing terms:
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*/
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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
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*/
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/* Copyright 2013 Mozilla Contributors
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*
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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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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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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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#ifndef mozilla_psm_OCSPCache_h
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#define mozilla_psm_OCSPCache_h
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#include "hasht.h"
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#include "mozilla/Mutex.h"
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#include "mozilla/Vector.h"
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#include "pkix/Result.h"
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#include "pkix/Time.h"
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#include "prerror.h"
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#include "seccomon.h"
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namespace mozilla { namespace pkix {
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struct CertID;
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} } // namespace mozilla::pkix
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namespace mozilla { namespace psm {
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// make SHA384Buffer be of type "array of uint8_t of length SHA384_LENGTH"
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typedef uint8_t SHA384Buffer[SHA384_LENGTH];
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// OCSPCache can store and retrieve OCSP response verification results. Each
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// result is keyed on the certificate that purportedly corresponds to it (where
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// certificates are distinguished based on serial number, issuer, and
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// issuer public key, much like in an encoded OCSP response itself). A maximum
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// of 1024 distinct entries can be stored.
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// OCSPCache is thread-safe.
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class OCSPCache
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{
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public:
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OCSPCache();
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~OCSPCache();
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// Returns true if the status of the given certificate (issued by the given
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// issuer) is in the cache, and false otherwise.
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// If it is in the cache, returns by reference the error code of the cached
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// status and the time through which the status is considered trustworthy.
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bool Get(const mozilla::pkix::CertID& aCertID,
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/*out*/ mozilla::pkix::Result& aResult,
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/*out*/ mozilla::pkix::Time& aValidThrough);
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// Caches the status of the given certificate (issued by the given issuer).
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// The status is considered trustworthy through the given time.
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// A status with an error code of SEC_ERROR_REVOKED_CERTIFICATE will not
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// be replaced or evicted.
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// A status with an error code of SEC_ERROR_OCSP_UNKNOWN_CERT will not
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// be evicted when the cache is full.
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// A status with a more recent thisUpdate will not be replaced with a
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// status with a less recent thisUpdate unless the less recent status
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// indicates the certificate is revoked.
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mozilla::pkix::Result Put(const mozilla::pkix::CertID& aCertID,
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mozilla::pkix::Result aResult,
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mozilla::pkix::Time aThisUpdate,
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mozilla::pkix::Time aValidThrough);
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// Removes everything from the cache.
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void Clear();
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private:
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class Entry
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{
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public:
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Entry(mozilla::pkix::Result aResult,
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mozilla::pkix::Time aThisUpdate,
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mozilla::pkix::Time aValidThrough)
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: mResult(aResult)
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, mThisUpdate(aThisUpdate)
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, mValidThrough(aValidThrough)
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{
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}
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mozilla::pkix::Result Init(const mozilla::pkix::CertID& aCertID);
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mozilla::pkix::Result mResult;
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mozilla::pkix::Time mThisUpdate;
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mozilla::pkix::Time mValidThrough;
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// The SHA-384 hash of the concatenation of the DER encodings of the
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// issuer name and issuer key, followed by the serial number.
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// See the documentation for CertIDHash in OCSPCache.cpp.
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SHA384Buffer mIDHash;
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};
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bool FindInternal(const mozilla::pkix::CertID& aCertID, /*out*/ size_t& index,
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const MutexAutoLock& aProofOfLock);
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void MakeMostRecentlyUsed(size_t aIndex, const MutexAutoLock& aProofOfLock);
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Mutex mMutex;
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static const size_t MaxEntries = 1024;
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// Sorted with the most-recently-used entry at the end.
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// Using 256 here reserves as much possible inline storage as the vector
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// implementation will give us. 1024 bytes is the maximum it allows,
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// which results in 256 Entry pointers or 128 Entry pointers, depending
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// on the size of a pointer.
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Vector<Entry*, 256> mEntries;
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};
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} } // namespace mozilla::psm
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#endif // mozilla_psm_OCSPCache_h
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