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crypt32: Only decode authority key ID in subject cert once when looking for issuer.

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Juan Lang 2007-09-11 12:47:51 -07:00 committed by Alexandre Julliard
parent 05492ae907
commit 5c8254886f
1 changed files with 98 additions and 4 deletions
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102
dlls/crypt32/chain.c
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@ -17,6 +17,7 @@
*
*/
#include <stdarg.h>
#define NONAMELESSUNION
#include "windef.h"
#include "winbase.h"
#include "wincrypt.h"
@ -514,11 +515,104 @@ static void CRYPT_CheckSimpleChain(PCertificateChainEngine engine,
static PCCERT_CONTEXT CRYPT_GetIssuer(HCERTSTORE store, PCCERT_CONTEXT subject,
PCCERT_CONTEXT prevIssuer)
{
PCCERT_CONTEXT issuer;
DWORD flags = 0;
PCCERT_CONTEXT issuer = NULL;
PCERT_EXTENSION ext;
DWORD size;
issuer = CertGetIssuerCertificateFromStore(store, subject, prevIssuer,
&flags);
if ((ext = CertFindExtension(szOID_AUTHORITY_KEY_IDENTIFIER,
subject->pCertInfo->cExtension, subject->pCertInfo->rgExtension)))
{
CERT_AUTHORITY_KEY_ID_INFO *info;
BOOL ret;
ret = CryptDecodeObjectEx(subject->dwCertEncodingType,
X509_AUTHORITY_KEY_ID, ext->Value.pbData, ext->Value.cbData,
CRYPT_DECODE_ALLOC_FLAG | CRYPT_DECODE_NOCOPY_FLAG, NULL,
&info, &size);
if (ret)
{
CERT_ID id;
if (info->CertIssuer.cbData && info->CertSerialNumber.cbData)
{
id.dwIdChoice = CERT_ID_ISSUER_SERIAL_NUMBER;
memcpy(&id.u.IssuerSerialNumber.Issuer, &info->CertIssuer,
sizeof(CERT_NAME_BLOB));
memcpy(&id.u.IssuerSerialNumber.SerialNumber,
&info->CertSerialNumber, sizeof(CRYPT_INTEGER_BLOB));
issuer = CertFindCertificateInStore(store,
subject->dwCertEncodingType, 0, CERT_FIND_CERT_ID, &id,
prevIssuer);
}
else if (info->KeyId.cbData)
{
id.dwIdChoice = CERT_ID_KEY_IDENTIFIER;
memcpy(&id.u.KeyId, &info->KeyId, sizeof(CRYPT_HASH_BLOB));
issuer = CertFindCertificateInStore(store,
subject->dwCertEncodingType, 0, CERT_FIND_CERT_ID, &id,
prevIssuer);
}
LocalFree(info);
}
}
else if ((ext = CertFindExtension(szOID_AUTHORITY_KEY_IDENTIFIER2,
subject->pCertInfo->cExtension, subject->pCertInfo->rgExtension)))
{
CERT_AUTHORITY_KEY_ID2_INFO *info;
BOOL ret;
ret = CryptDecodeObjectEx(subject->dwCertEncodingType,
X509_AUTHORITY_KEY_ID2, ext->Value.pbData, ext->Value.cbData,
CRYPT_DECODE_ALLOC_FLAG | CRYPT_DECODE_NOCOPY_FLAG, NULL,
&info, &size);
if (ret)
{
CERT_ID id;
if (info->AuthorityCertIssuer.cAltEntry &&
info->AuthorityCertSerialNumber.cbData)
{
PCERT_ALT_NAME_ENTRY directoryName = NULL;
DWORD i;
for (i = 0; !directoryName &&
i < info->AuthorityCertIssuer.cAltEntry; i++)
if (info->AuthorityCertIssuer.rgAltEntry[i].dwAltNameChoice
== CERT_ALT_NAME_DIRECTORY_NAME)
directoryName =
&info->AuthorityCertIssuer.rgAltEntry[i];
if (directoryName)
{
id.dwIdChoice = CERT_ID_ISSUER_SERIAL_NUMBER;
memcpy(&id.u.IssuerSerialNumber.Issuer,
&directoryName->u.DirectoryName, sizeof(CERT_NAME_BLOB));
memcpy(&id.u.IssuerSerialNumber.SerialNumber,
&info->AuthorityCertSerialNumber,
sizeof(CRYPT_INTEGER_BLOB));
issuer = CertFindCertificateInStore(store,
subject->dwCertEncodingType, 0, CERT_FIND_CERT_ID, &id,
prevIssuer);
}
else
FIXME("no supported name type in authority key id2\n");
}
else if (info->KeyId.cbData)
{
id.dwIdChoice = CERT_ID_KEY_IDENTIFIER;
memcpy(&id.u.KeyId, &info->KeyId, sizeof(CRYPT_HASH_BLOB));
issuer = CertFindCertificateInStore(store,
subject->dwCertEncodingType, 0, CERT_FIND_CERT_ID, &id,
prevIssuer);
}
LocalFree(info);
}
}
else
{
issuer = CertFindCertificateInStore(store,
subject->dwCertEncodingType, 0, CERT_FIND_SUBJECT_NAME,
&subject->pCertInfo->Issuer, prevIssuer);
}
return issuer;
}