X.509: Remove certificate date checks

commit 124df926090b32a998483f6e43ebeccdbe5b5302 upstream.

Remove the certificate date checks that are performed when a certificate is
parsed.  There are two checks: a valid from and a valid to.  The first check is
causing a lot of problems with system clocks that don't keep good time and the
second places an implicit expiry date upon the kernel when used for module
signing, so do we really need them?

Signed-off-by: David Howells <dhowells@redhat.com>
cc: David Woodhouse <dwmw2@infradead.org>
cc: Rusty Russell <rusty@rustcorp.com.au>
cc: Josh Boyer <jwboyer@redhat.com>
cc: Alexander Holler <holler@ahsoftware.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 0 insertions, 38 deletions

diff --git a/crypto/asymmetric_keys/x509_public_key.c b/crypto/asymmetric_keys/x509_public_key.c
index 06007f0e880c..52222a2f34ba 100644
--- a/crypto/asymmetric_keys/x509_public_key.c
+++ b/crypto/asymmetric_keys/x509_public_key.c
@@ -106,7 +106,6 @@ error_no_sig:
 static int x509_key_preparse(struct key_preparsed_payload *prep)
 {
         struct x509_certificate *cert;
-        struct tm now;
         size_t srlen, sulen;
         char *desc = NULL;
         int ret;
@@ -137,43 +136,6 @@ static int x509_key_preparse(struct key_preparsed_payload *prep)
                 goto error_free_cert;
         }
 
-        time_to_tm(CURRENT_TIME.tv_sec, 0, &now);
-        pr_devel("Now: %04ld-%02d-%02d %02d:%02d:%02d\n",
-                 now.tm_year + 1900, now.tm_mon + 1, now.tm_mday,
-                 now.tm_hour, now.tm_min,  now.tm_sec);
-        if (now.tm_year < cert->valid_from.tm_year ||
-            (now.tm_year == cert->valid_from.tm_year &&
-             (now.tm_mon < cert->valid_from.tm_mon ||
-              (now.tm_mon == cert->valid_from.tm_mon &&
-               (now.tm_mday < cert->valid_from.tm_mday ||
-                (now.tm_mday == cert->valid_from.tm_mday &&
-                 (now.tm_hour < cert->valid_from.tm_hour ||
-                  (now.tm_hour == cert->valid_from.tm_hour &&
-                   (now.tm_min < cert->valid_from.tm_min ||
-                    (now.tm_min == cert->valid_from.tm_min &&
-                     (now.tm_sec < cert->valid_from.tm_sec
-                      ))))))))))) {
-                pr_warn("Cert %s is not yet valid\n", cert->fingerprint);
-                ret = -EKEYREJECTED;
-                goto error_free_cert;
-        }
-        if (now.tm_year > cert->valid_to.tm_year ||
-            (now.tm_year == cert->valid_to.tm_year &&
-             (now.tm_mon > cert->valid_to.tm_mon ||
-              (now.tm_mon == cert->valid_to.tm_mon &&
-               (now.tm_mday > cert->valid_to.tm_mday ||
-                (now.tm_mday == cert->valid_to.tm_mday &&
-                 (now.tm_hour > cert->valid_to.tm_hour ||
-                  (now.tm_hour == cert->valid_to.tm_hour &&
-                   (now.tm_min > cert->valid_to.tm_min ||
-                    (now.tm_min == cert->valid_to.tm_min &&
-                     (now.tm_sec > cert->valid_to.tm_sec
-                      ))))))))))) {
-                pr_warn("Cert %s has expired\n", cert->fingerprint);
-                ret = -EKEYEXPIRED;
-                goto error_free_cert;
-        }
-
         cert->pub->algo = x509_public_key_algorithms[cert->pkey_algo];
         cert->pub->id_type = PKEY_ID_X509;