ITS#6975 MozNSS - allow cacertdir in most cases

OpenLDAP built with OpenSSL allows most any value of cacertdir - directory
is a file, directory does not contain any CA certs, directory does not
exist - users expect if they specify TLS_REQCERT=never, no matter what
the TLS_CACERTDIR setting is, TLS/SSL will just work.
TLS_CACERT, on the other hand, is a hard error.  Even if TLS_REQCERT=never,
if TLS_CACERT is specified and is not a valid CA cert file, TLS/SSL will
fail.  This patch makes CACERT errors hard errors, and makes CACERTDIR
errors "soft" errors.  The code checks CACERT first and, even though
the function will return an error, checks CACERTDIR anyway so that if the
user sets TRACE mode they will get CACERTDIR processing messages.

diff --git a/libraries/libldap/tls_m.c b/libraries/libldap/tls_m.c
index 911885ddcd5c80edffd749234852215c503d93cc..7be703b490b07ccdd88e710a5c9a8544125e9fa1 100644 (file)
--- a/libraries/libldap/tls_m.c
+++ b/libraries/libldap/tls_m.c
@@ -1320,7 +1320,7 @@ static int
 tlsm_init_ca_certs( tlsm_ctx *ctx, const char *cacertfile, const char *cacertdir )
 {
        PRBool isca = PR_TRUE;
-       PRStatus status = PR_FAILURE;
+       PRStatus status = PR_SUCCESS;
        PRErrorCode errcode = PR_SUCCESS;
 
        if ( !cacertfile && !cacertdir ) {
@@ -1336,14 +1336,24 @@ tlsm_init_ca_certs( tlsm_ctx *ctx, const char *cacertfile, const char *cacertdir
                                   "TLS: %s is not a valid CA certificate file - error %d:%s.\n",
                                   cacertfile, errcode,
                                   PR_ErrorToString( errcode, PR_LANGUAGE_I_DEFAULT ) );
+                       /* failure with cacertfile is a hard failure even if cacertdir is
+                          also specified and contains valid CA cert files */
+                       status = PR_FAILURE;
                } else {
                        Debug( LDAP_DEBUG_TRACE,
                                   "TLS: loaded CA certificate file %s.\n",
                                   cacertfile, 0, 0 );
-                       status = PR_SUCCESS; /* have at least one good CA - we can proceed */
                }
        }
 
+       /* if cacertfile above failed, we will return failure, even
+          if there is a valid CA cert in cacertdir - but we still
+          process cacertdir in case the user has enabled trace level
+          debugging so they can see the processing for cacertdir too */
+       /* any cacertdir failures are "soft" failures - if the user specifies
+          no cert checking, then we allow the tls/ssl to continue, no matter
+          what was specified for cacertdir, or the contents of the directory
+          - this is different behavior than that of cacertfile */
        if ( cacertdir ) {
                PRFileInfo fi;
                PRDir *dir;
@@ -1397,7 +1407,6 @@ tlsm_init_ca_certs( tlsm_ctx *ctx, const char *cacertfile, const char *cacertdir
                                        Debug( LDAP_DEBUG_TRACE,
                                                   "TLS: loaded CA certificate file %s from CA certificate directory %s.\n",
                                                   fullpath, cacertdir, 0 );
-                                       status = PR_SUCCESS; /* found at least 1 valid CA file in the dir */
                                } else {
                                        errcode = PR_GetError();
                                        Debug( LDAP_DEBUG_TRACE,
@@ -1412,14 +1421,6 @@ tlsm_init_ca_certs( tlsm_ctx *ctx, const char *cacertfile, const char *cacertdir
        }
 done:
        if ( status != PR_SUCCESS ) {
-               const char *fmtstr = NULL;
-               if ( cacertfile && cacertdir ) {
-                       fmtstr = "TLS: did not find any valid CA certificates in %s or %s\n";
-               } else {
-                       fmtstr = "TLS: did not find any valid CA certificates in %s%s\n";
-               }
-               Debug( LDAP_DEBUG_ANY, fmtstr, cacertdir ? cacertdir : "",
-                          cacertfile ? cacertfile : "", 0 );
                return -1;
        }