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crypt32: Initial implementation of CertGetCertificateChain and CertFreeCertificateChain.

This commit is contained in:
Juan Lang 2007-08-14 15:15:02 -07:00 committed by Alexandre Julliard
parent 51651c7c5c
commit 9a58b30819
2 changed files with 294 additions and 15 deletions
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300
dlls/crypt32/chain.c
View File

@ -25,6 +25,8 @@
WINE_DEFAULT_DEBUG_CHANNEL(crypt);
static HCERTCHAINENGINE CRYPT_defaultChainEngine;
/* This represents a subset of a certificate chain engine: it doesn't include
* the "hOther" store described by MSDN, because I'm not sure how that's used.
* It also doesn't include the "hTrust" store, because I don't yet implement
@ -171,22 +173,308 @@ void WINAPI CertFreeCertificateChainEngine(HCERTCHAINENGINE hChainEngine)
}
}
static HCERTCHAINENGINE CRYPT_GetDefaultChainEngine(void)
{
if (!CRYPT_defaultChainEngine)
{
CERT_CHAIN_ENGINE_CONFIG config = { 0 };
HCERTCHAINENGINE engine;
config.cbSize = sizeof(config);
CertCreateCertificateChainEngine(&config, &engine);
InterlockedCompareExchangePointer(&CRYPT_defaultChainEngine, engine,
NULL);
if (CRYPT_defaultChainEngine != engine)
CertFreeCertificateChainEngine(engine);
}
return CRYPT_defaultChainEngine;
}
void default_chain_engine_free(void)
{
CertFreeCertificateChainEngine(CRYPT_defaultChainEngine);
}
typedef struct _CertificateChain
{
CERT_CHAIN_CONTEXT context;
LONG ref;
} CertificateChain, *PCertificateChain;
static inline BOOL WINAPI CRYPT_IsCertificateSelfSigned(PCCERT_CONTEXT cert)
{
return CertCompareCertificateName(cert->dwCertEncodingType,
&cert->pCertInfo->Subject, &cert->pCertInfo->Issuer);
}
/* Gets cert's issuer from store, and returns the validity flags associated
* with it. Returns NULL if no issuer whose public key matches cert's
* signature could be found.
*/
static PCCERT_CONTEXT CRYPT_GetIssuerFromStore(HCERTSTORE store,
PCCERT_CONTEXT cert, PDWORD pdwFlags)
{
PCCERT_CONTEXT issuer = NULL;
/* There might be more than issuer with the same name, so keep looking until
* one produces the correct signature for this cert.
*/
do {
*pdwFlags = CERT_STORE_REVOCATION_FLAG | CERT_STORE_SIGNATURE_FLAG |
CERT_STORE_TIME_VALIDITY_FLAG;
issuer = CertGetIssuerCertificateFromStore(store, cert, issuer,
pdwFlags);
} while (issuer && (*pdwFlags & CERT_STORE_SIGNATURE_FLAG));
return issuer;
}
static BOOL CRYPT_AddCertToSimpleChain(PCERT_SIMPLE_CHAIN chain,
PCCERT_CONTEXT cert, DWORD dwFlags)
{
BOOL ret = FALSE;
PCERT_CHAIN_ELEMENT element = CryptMemAlloc(sizeof(CERT_CHAIN_ELEMENT));
if (element)
{
if (!chain->cElement)
chain->rgpElement = CryptMemAlloc(sizeof(PCERT_CHAIN_ELEMENT));
else
chain->rgpElement = CryptMemRealloc(chain->rgpElement,
(chain->cElement + 1) * sizeof(PCERT_CHAIN_ELEMENT));
if (chain->rgpElement)
{
memset(element, 0, sizeof(CERT_CHAIN_ELEMENT));
element->cbSize = sizeof(CERT_CHAIN_ELEMENT);
element->pCertContext = cert;
if (dwFlags & CERT_STORE_REVOCATION_FLAG &&
!(dwFlags & CERT_STORE_NO_CRL_FLAG))
element->TrustStatus.dwErrorStatus |= CERT_TRUST_IS_REVOKED;
if (dwFlags & CERT_STORE_SIGNATURE_FLAG)
element->TrustStatus.dwErrorStatus |=
CERT_TRUST_IS_NOT_SIGNATURE_VALID;
if (dwFlags & CERT_STORE_TIME_VALIDITY_FLAG)
element->TrustStatus.dwErrorStatus |=
CERT_TRUST_IS_NOT_TIME_VALID;
/* It appears, from every example certificate chain I've found,
* that this flag is always set:
*/
element->TrustStatus.dwInfoStatus = CERT_TRUST_HAS_PREFERRED_ISSUER;
if (chain->cElement)
{
PCERT_CHAIN_ELEMENT prevElement =
chain->rgpElement[chain->cElement - 1];
/* This cert is the issuer of the previous one in the chain, so
* retroactively check the previous one's time validity nesting.
*/
if (!CertVerifyValidityNesting(
prevElement->pCertContext->pCertInfo, cert->pCertInfo))
prevElement->TrustStatus.dwErrorStatus |=
CERT_TRUST_IS_NOT_TIME_NESTED;
}
/* FIXME: check valid usages, name constraints, and for cycles */
/* FIXME: initialize the rest of element */
chain->TrustStatus.dwErrorStatus |=
element->TrustStatus.dwErrorStatus;
chain->TrustStatus.dwInfoStatus |=
element->TrustStatus.dwInfoStatus;
chain->rgpElement[chain->cElement++] = element;
ret = TRUE;
}
else
CryptMemFree(element);
}
return ret;
}
static void CRYPT_FreeSimpleChain(PCERT_SIMPLE_CHAIN chain)
{
DWORD i;
for (i = 0; i < chain->cElement; i++)
CryptMemFree(chain->rgpElement[i]);
CryptMemFree(chain->rgpElement);
CryptMemFree(chain);
}
static BOOL CRYPT_BuildSimpleChain(HCERTCHAINENGINE hChainEngine,
PCCERT_CONTEXT cert, LPFILETIME pTime, HCERTSTORE hAdditionalStore,
PCERT_SIMPLE_CHAIN *ppChain)
{
BOOL ret = FALSE;
PCertificateChainEngine engine = (PCertificateChainEngine)hChainEngine;
PCERT_SIMPLE_CHAIN chain;
HCERTSTORE world;
TRACE("(%p, %p, %p, %p)\n", hChainEngine, cert, pTime, hAdditionalStore);
world = CertOpenStore(CERT_STORE_PROV_COLLECTION, 0, 0,
CERT_STORE_CREATE_NEW_FLAG, NULL);
CertAddStoreToCollection(world, engine->hWorld, 0, 0);
if (cert->hCertStore)
CertAddStoreToCollection(world, cert->hCertStore, 0, 0);
if (hAdditionalStore)
CertAddStoreToCollection(world, hAdditionalStore, 0, 0);
chain = CryptMemAlloc(sizeof(CERT_SIMPLE_CHAIN));
if (chain)
{
memset(chain, 0, sizeof(CERT_SIMPLE_CHAIN));
chain->cbSize = sizeof(CERT_SIMPLE_CHAIN);
ret = CRYPT_AddCertToSimpleChain(chain, cert, 0);
while (ret && !CRYPT_IsCertificateSelfSigned(cert))
{
DWORD flags;
PCCERT_CONTEXT issuer = CRYPT_GetIssuerFromStore(world, cert,
&flags);
if (issuer)
{
ret = CRYPT_AddCertToSimpleChain(chain, issuer, flags);
cert = issuer;
}
else
{
TRACE("Couldn't find issuer, aborting chain creation\n");
ret = FALSE;
}
}
if (ret)
{
PCCERT_CONTEXT root = chain->rgpElement[chain->cElement - 1]->
pCertContext;
if (!(ret = CRYPT_IsCertificateSelfSigned(root)))
TRACE("Last certificate is not self-signed\n");
else
{
chain->rgpElement[chain->cElement - 1]->TrustStatus.dwInfoStatus
|= CERT_TRUST_IS_SELF_SIGNED;
if (!(ret = CryptVerifyCertificateSignatureEx(0,
root->dwCertEncodingType, CRYPT_VERIFY_CERT_SIGN_SUBJECT_CERT,
(void *)root, CRYPT_VERIFY_CERT_SIGN_ISSUER_CERT, (void *)root,
0, NULL)))
TRACE("Last certificate's signature is invalid\n");
}
if (ret)
{
BYTE hash[20];
DWORD size = sizeof(hash);
CRYPT_HASH_BLOB blob = { sizeof(hash), hash };
PCCERT_CONTEXT trustedRoot;
CertGetCertificateContextProperty(root, CERT_HASH_PROP_ID, hash,
&size);
trustedRoot = CertFindCertificateInStore(engine->hRoot,
root->dwCertEncodingType, 0, CERT_FIND_SHA1_HASH, &blob, NULL);
if (!trustedRoot)
chain->TrustStatus.dwErrorStatus |=
CERT_TRUST_IS_UNTRUSTED_ROOT;
else
CertFreeCertificateContext(trustedRoot);
}
}
if (!ret)
{
CRYPT_FreeSimpleChain(chain);
chain = NULL;
}
*ppChain = chain;
}
CertCloseStore(world, 0);
return ret;
}
typedef struct _CERT_CHAIN_PARA_NO_EXTRA_FIELDS {
DWORD cbSize;
CERT_USAGE_MATCH RequestedUsage;
} CERT_CHAIN_PARA_NO_EXTRA_FIELDS, *PCERT_CHAIN_PARA_NO_EXTRA_FIELDS;
typedef struct _CERT_CHAIN_PARA_EXTRA_FIELDS {
DWORD cbSize;
CERT_USAGE_MATCH RequestedUsage;
CERT_USAGE_MATCH RequestedIssuancePolicy;
DWORD dwUrlRetrievalTimeout;
BOOL fCheckRevocationFreshnessTime;
DWORD dwRevocationFreshnessTime;
} CERT_CHAIN_PARA_EXTRA_FIELDS, *PCERT_CHAIN_PARA_EXTRA_FIELDS;
BOOL WINAPI CertGetCertificateChain(HCERTCHAINENGINE hChainEngine,
PCCERT_CONTEXT pCertContext, LPFILETIME pTime, HCERTSTORE hAdditionalStore,
PCERT_CHAIN_PARA pChainPara, DWORD dwFlags, LPVOID pvReserved,
PCCERT_CHAIN_CONTEXT* ppChainContext)
{
FIXME("(%p, %p, %p, %p, %p, 0x%08X, %p, %p): stub\n", hChainEngine,
pCertContext, pTime, hAdditionalStore, pChainPara, dwFlags, pvReserved,
ppChainContext);
PCERT_SIMPLE_CHAIN simpleChain = NULL;
BOOL ret;
TRACE("(%p, %p, %p, %p, %p, %08x, %p, %p)\n", hChainEngine, pCertContext,
pTime, hAdditionalStore, pChainPara, dwFlags, pvReserved, ppChainContext);
if (!pChainPara)
{
SetLastError(E_INVALIDARG);
return FALSE;
}
if (ppChainContext)
*ppChainContext = NULL;
SetLastError(ERROR_CALL_NOT_IMPLEMENTED);
return FALSE;
if (!hChainEngine)
hChainEngine = CRYPT_GetDefaultChainEngine();
/* FIXME: what about HCCE_LOCAL_MACHINE? */
/* FIXME: pChainPara is for now ignored */
/* FIXME: only simple chains are supported for now, as CTLs aren't
* supported yet.
*/
if ((ret = CRYPT_BuildSimpleChain(hChainEngine, pCertContext, pTime,
hAdditionalStore, &simpleChain)))
{
PCertificateChain chain = CryptMemAlloc(sizeof(CertificateChain));
if (chain)
{
chain->ref = 1;
chain->context.cbSize = sizeof(CERT_CHAIN_CONTEXT);
memcpy(&chain->context.TrustStatus, &simpleChain->TrustStatus,
sizeof(CERT_TRUST_STATUS));
chain->context.cChain = 1;
chain->context.rgpChain = CryptMemAlloc(sizeof(PCERT_SIMPLE_CHAIN));
chain->context.rgpChain[0] = simpleChain;
chain->context.cLowerQualityChainContext = 0;
chain->context.rgpLowerQualityChainContext = NULL;
chain->context.fHasRevocationFreshnessTime = FALSE;
chain->context.dwRevocationFreshnessTime = 0;
}
else
ret = FALSE;
if (ppChainContext)
*ppChainContext = (PCCERT_CHAIN_CONTEXT)chain;
else
CertFreeCertificateChain((PCCERT_CHAIN_CONTEXT)chain);
}
TRACE("returning %d\n", ret);
return ret;
}
static void CRYPT_FreeChainContext(PCertificateChain chain)
{
DWORD i;
/* Note the chain's rgpLowerQualityChainContext isn't freed, but
* it's never set, either.
*/
for (i = 0; i < chain->context.cChain; i++)
CRYPT_FreeSimpleChain(chain->context.rgpChain[i]);
CryptMemFree(chain->context.rgpChain);
CryptMemFree(chain);
}
void WINAPI CertFreeCertificateChain(PCCERT_CHAIN_CONTEXT pChainContext)
{
FIXME("(%p): stub\n", pChainContext);
PCertificateChain chain = (PCertificateChain)pChainContext;
TRACE("(%p)\n", pChainContext);
if (chain)
{
if (InterlockedDecrement(&chain->ref) == 0)
CRYPT_FreeChainContext(chain);
}
}

9
dlls/crypt32/tests/chain.c
View File

@ -492,12 +492,10 @@ static void testGetCertChain(void)
/* Basic parameter checks */
ret = CertGetCertificateChain(NULL, NULL, NULL, NULL, NULL, 0, NULL, NULL);
todo_wine
ok(!ret && GetLastError() == E_INVALIDARG,
"Expected E_INVALIDARG, got %08x\n", GetLastError());
ret = CertGetCertificateChain(NULL, NULL, NULL, NULL, NULL, 0, NULL,
&chain);
todo_wine
ok(!ret && GetLastError() == E_INVALIDARG,
"Expected E_INVALIDARG, got %08x\n", GetLastError());
/* Crash
@ -509,7 +507,6 @@ static void testGetCertChain(void)
sizeof(bigCert));
todo_wine
ret = CertGetCertificateChain(NULL, cert, NULL, NULL, NULL, 0, NULL, NULL);
todo_wine
ok(!ret && GetLastError() == E_INVALIDARG,
"Expected E_INVALIDARG, got %08x\n", GetLastError());
/* Crash
@ -530,14 +527,11 @@ static void testGetCertChain(void)
cert = CertCreateCertificateContext(X509_ASN_ENCODING, selfSignedCert,
sizeof(selfSignedCert));
ret = CertGetCertificateChain(NULL, cert, NULL, NULL, NULL, 0, NULL, NULL);
todo_wine
ok(!ret && GetLastError() == E_INVALIDARG,
"Expected E_INVALIDARG, got %08x\n", GetLastError());
ret = CertGetCertificateChain(NULL, cert, NULL, NULL, &para, 0, NULL,
&chain);
todo_wine
ok(ret, "CertGetCertificateChain failed: %08x\n", GetLastError());
todo_wine
ok(chain != NULL, "Expected a chain\n");
if (chain)
{
@ -564,7 +558,6 @@ static void testGetCertChain(void)
ok(ret, "CertCreateCertificateChainEngine failed: %08x\n", GetLastError());
ret = CertGetCertificateChain(engine, cert, NULL, NULL, &para, 0, NULL,
&chain);
todo_wine
ok(chain != NULL, "Expected a chain\n");
if (chain)
{
@ -625,14 +618,12 @@ static void testGetCertChain(void)
else
ret = CertGetCertificateChain(NULL, cert, NULL,
config.hRestrictedRoot, &para, 0, NULL, &chain);
todo_wine
ok(ret, "CertGetCertificateChain failed: %08x\n", GetLastError());
if (ret)
{
/* Since there's no guarantee the Verisign cert is in the Root
* store, either error is acceptable.
*/
todo_wine
ok(chain->TrustStatus.dwErrorStatus == CERT_TRUST_NO_ERROR ||
chain->TrustStatus.dwErrorStatus == CERT_TRUST_IS_UNTRUSTED_ROOT,
"Expected no error or CERT_TRUST_IS_UNTRUSTED_ROOT, got %08x\n",