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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
//
//
#include "common.h"
#ifdef FEATURE_CAS_POLICY
#include "certificatecache.h"
CertificateCache::CertificateCache () {
WRAPPER_NO_CONTRACT;
m_dwNumEntries = 0;
for (DWORD i=0; i < MAX_CACHED_CERTIFICATES; i++) {
m_Entry[i] = NULL;
}
m_CertificateCacheCrst.Init(CrstPublisherCertificate);
}
CertificateCache::~CertificateCache () {
// Let the OS collect the memory allocated for the cached certificates.
}
COR_TRUST* CertificateCache::GetEntry (DWORD index) {
LIMITED_METHOD_CONTRACT;
if (index < 0 || index >= MAX_CACHED_CERTIFICATES)
return NULL;
return m_Entry[index];
}
EnumCertificateAdditionFlags CertificateCache::AddEntry (COR_TRUST* pCertificate, DWORD* pIndex) {
CONTRACTL {
THROWS;
GC_TRIGGERS;
MODE_PREEMPTIVE;
PRECONDITION(pIndex != NULL);
} CONTRACTL_END;
*pIndex = FindEntry(pCertificate);
if (*pIndex < MAX_CACHED_CERTIFICATES)
return AlreadyExists; // the certificate is already cached.
if (m_dwNumEntries >= MAX_CACHED_CERTIFICATES)
return CacheSaturated; // the cache is full
CrstHolder csh(&m_CertificateCacheCrst);
if (m_dwNumEntries >= MAX_CACHED_CERTIFICATES)
return CacheSaturated;
// check again now that we have the lock.
*pIndex = FindEntry(pCertificate);
if (*pIndex < MAX_CACHED_CERTIFICATES)
return AlreadyExists;
*pIndex = m_dwNumEntries;
m_Entry[m_dwNumEntries++] = pCertificate;
return Success;
}
BOOL CertificateCache::Contains (COR_TRUST* pCertificate) {
WRAPPER_NO_CONTRACT;
DWORD index = FindEntry(pCertificate);
return (index < MAX_CACHED_CERTIFICATES && index >= 0);
}
DWORD CertificateCache::FindEntry (COR_TRUST* pCertificate) {
CONTRACTL
{
MODE_ANY;
GC_NOTRIGGER;
NOTHROW;
}CONTRACTL_END;
for (DWORD i=0; i < MAX_CACHED_CERTIFICATES; i++) {
if (m_Entry[i] != NULL) {
if ((pCertificate->cbSigner == m_Entry[i]->cbSigner) &&
(memcmp(pCertificate->pbSigner, m_Entry[i]->pbSigner, m_Entry[i]->cbSigner) == 0))
return i;
}
}
return 0xFFFFFFFF;
}
#endif // FEATURE_CAS_POLICY
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