[PATCH 1/1] crypt32: Make CertFindCertificateInStore(CERT_FIND_ISSUER_NAME) work.

[Dmitry Timoshkov]

From: Dmitry Timoshkov

1. dwType (CERT_INFO_xxxx_FLAG) is not a mask. CERT_INFO_xxxx_FLAGs have
values from 0 to 11, so for instance CERT_INFO_SUBJECT_FLAG is equal to 7
and CERT_INFO_ISSUER_FLAG is equal to 4.
2. CERT_COMPARE_xxxx have values from 0 to 10, so CERT_COMPARE_NAME is
equal to 2 and CERT_COMPARE_SUBJECT_CERT is equal to 11, therefore
combining CERT_COMPARE_NAME | CERT_COMPARE_SUBJECT_CERT doesn't make
sense.
3. Because of 1 and 2 CertFindCertificateInStore(CERT_FIND_ISSUER_NAME)
currently looks up a certificate by Subject instead of Issuer.

Fixing just one of the problems above leads to test failures. Existing
tests work because they use a self-signed certificate where Issuer and
Subject are the same.

Signed-off-by: Dmitry Timoshkov 
---
 dlls/crypt32/cert.c | 13 +++++++++----
 1 file changed, 9 insertions(+), 4 deletions(-)

diff --git a/dlls/crypt32/cert.c b/dlls/crypt32/cert.c
index 373805e858f..7b1edaa2236 100644
--- a/dlls/crypt32/cert.c
+++ b/dlls/crypt32/cert.c
@@ -1482,10 +1482,15 @@ static BOOL compare_cert_by_name(PCCERT_CONTEXT pCertContext, DWORD dwType,
     CERT_NAME_BLOB *blob = (CERT_NAME_BLOB *)pvPara, *toCompare;
     BOOL ret;

-    if (dwType & CERT_INFO_SUBJECT_FLAG)
+    if ((dwType & CERT_COMPARE_MASK) == CERT_INFO_SUBJECT_FLAG)
         toCompare = &pCertContext->pCertInfo->Subject;
-    else
+    else if ((dwType & CERT_COMPARE_MASK) == CERT_INFO_ISSUER_FLAG)
         toCompare = &pCertContext->pCertInfo->Issuer;
+    else
+    {
+        ERR("dwType %08lx doesn't specify SUBJECT or ISSUER\n", dwType);
+        return FALSE;
+    }
     ret = CertCompareCertificateName(pCertContext->dwCertEncodingType,
      toCompare, blob);
     return ret;
@@ -1735,7 +1740,7 @@ static PCCERT_CONTEXT find_cert_by_issuer(HCERTSTORE store, DWORD dwType,
     }
     else
        found = cert_compare_certs_in_store(store, prev,
-        compare_cert_by_name, CERT_COMPARE_NAME | CERT_COMPARE_SUBJECT_CERT,
+        compare_cert_by_name, CERT_FIND_SUBJECT_NAME,
         dwFlags, &subject->pCertInfo->Issuer);
     return found;
 }
@@ -1747,7 +1752,7 @@ static BOOL compare_cert_by_name_str(PCCERT_CONTEXT pCertContext,
     DWORD len;
     BOOL ret = FALSE;

-    if (dwType & CERT_INFO_SUBJECT_FLAG)
+    if ((dwType & CERT_COMPARE_MASK) == CERT_INFO_SUBJECT_FLAG)
         name = &pCertContext->pCertInfo->Subject;
     else
         name = &pCertContext->pCertInfo->Issuer;