1 files changed, 121 insertions, 0 deletions
diff --git a/security/nss/lib/libpkix/pkix/checker/pkix_namechainingchecker.c b/security/nss/lib/libpkix/pkix/checker/pkix_namechainingchecker.c
new file mode 100644
index 0000000000..873d19cd05
--- /dev/null
+++ b/security/nss/lib/libpkix/pkix/checker/pkix_namechainingchecker.c
@@ -0,0 +1,121 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+/*
+ * pkix_namechainingchecker.c
+ *
+ * Functions for name chaining validation
+ *
+ */
+
+
+#include "pkix_namechainingchecker.h"
+
+/* --Private-Functions-------------------------------------------- */
+
+/*
+ * FUNCTION: pkix_NameChainingChecker_Check
+ * (see comments for PKIX_CertChainChecker_CheckCallback in pkix_checker.h)
+ */
+PKIX_Error *
+pkix_NameChainingChecker_Check(
+        PKIX_CertChainChecker *checker,
+        PKIX_PL_Cert *cert,
+        PKIX_List *unresolvedCriticalExtensions,
+        void **pNBIOContext,
+        void *plContext)
+{
+        PKIX_PL_X500Name *prevSubject = NULL;
+        PKIX_PL_X500Name *currIssuer = NULL;
+        PKIX_PL_X500Name *currSubject = NULL;
+        PKIX_Boolean result;
+
+        PKIX_ENTER(CERTCHAINCHECKER, "pkix_NameChainingChecker_Check");
+        PKIX_NULLCHECK_THREE(checker, cert, pNBIOContext);
+
+        *pNBIOContext = NULL; /* we never block on pending I/O */
+
+        PKIX_CHECK(PKIX_CertChainChecker_GetCertChainCheckerState
+                    (checker, (PKIX_PL_Object **)&prevSubject, plContext),
+                    PKIX_CERTCHAINCHECKERGETCERTCHAINCHECKERSTATEFAILED);
+
+        PKIX_CHECK(PKIX_PL_Cert_GetIssuer(cert, &currIssuer, plContext),
+                    PKIX_CERTGETISSUERFAILED);
+
+        if (prevSubject){
+                PKIX_CHECK(PKIX_PL_X500Name_Match
+                            (prevSubject, currIssuer, &result, plContext),
+                            PKIX_X500NAMEMATCHFAILED);
+                if (!result){
+                        PKIX_ERROR(PKIX_NAMECHAININGCHECKFAILED);
+                }
+        } else {
+                PKIX_ERROR(PKIX_NAMECHAININGCHECKFAILED);
+        }
+
+        PKIX_CHECK(PKIX_PL_Cert_GetSubject(cert, &currSubject, plContext),
+                    PKIX_CERTGETSUBJECTFAILED);
+
+        PKIX_CHECK(PKIX_CertChainChecker_SetCertChainCheckerState
+                    (checker, (PKIX_PL_Object *)currSubject, plContext),
+                    PKIX_CERTCHAINCHECKERSETCERTCHAINCHECKERSTATEFAILED);
+
+cleanup:
+
+        PKIX_DECREF(prevSubject);
+        PKIX_DECREF(currIssuer);
+        PKIX_DECREF(currSubject);
+
+        PKIX_RETURN(CERTCHAINCHECKER);
+
+}
+
+/*
+ * FUNCTION: pkix_NameChainingChecker_Initialize
+ * DESCRIPTION:
+ *
+ *  Creates a new CertChainChecker and stores it at "pChecker", where it will
+ *  be used by pkix_NameChainingChecker_Check to check that the issuer name
+ *  of the certificate matches the subject name in the checker's state. The
+ *  X500Name pointed to by "trustedCAName" is used to initialize the checker's
+ *  state.
+ *
+ * PARAMETERS:
+ *  "trustedCAName"
+ *      Address of X500Name representing the trusted CA Name used to
+ *      initialize the state of this checker. Must be non-NULL.
+ *  "pChecker"
+ *      Address where object pointer will be stored. Must be non-NULL.
+ *  "plContext"
+ *      Platform-specific context pointer.
+ * THREAD SAFETY:
+ *  Thread Safe (see Thread Safety Definitions in Programmer's Guide)
+ * RETURNS:
+ *  Returns NULL if the function succeeds.
+ *  Returns a CertChainChecker Error if the function fails in a non-fatal way.
+ *  Returns a Fatal Error if the function fails in an unrecoverable way.
+ */
+PKIX_Error *
+pkix_NameChainingChecker_Initialize(
+        PKIX_PL_X500Name *trustedCAName,
+        PKIX_CertChainChecker **pChecker,
+        void *plContext)
+{
+        PKIX_ENTER(CERTCHAINCHECKER, "PKIX_NameChainingChecker_Initialize");
+        PKIX_NULLCHECK_TWO(pChecker, trustedCAName);
+
+        PKIX_CHECK(PKIX_CertChainChecker_Create
+                    (pkix_NameChainingChecker_Check,
+                    PKIX_FALSE,
+                    PKIX_FALSE,
+                    NULL,
+                    (PKIX_PL_Object *)trustedCAName,
+                    pChecker,
+                    plContext),
+                    PKIX_CERTCHAINCHECKERCREATEFAILED);
+
+cleanup:
+
+        PKIX_RETURN(CERTCHAINCHECKER);
+
+}