2019-03-22 06:28:47

by Chun-Yi Lee

Subject: [PATCH] X.509: Add messages for obsolete OIDs

We found that the db in Acer machine has self signed certificates
(CN=DisablePW or CN=ABO) that they used obsolete OID 1.3.14.3.2.29
sha1WithRSASignature and 2.5.29.1 subjectKeyIdentifier. Kernel
emits -65 error code when loading those certificates to platform
keyring:

[ 1.484388] integrity: Loading X.509 certificate: UEFI:MokListRT
[ 1.485557] integrity: Problem loading X.509 certificate -65
[ 1.486100] Error adding keys to platform keyring UEFI:MokListRT

Because the -65 error code is not enough for appeasing user when
loading a outdated certificate. This patch add messages against
1.3.14.3.2.29 and 2.5.29.1 OIDs.

Link: https://bugzilla.opensuse.org/show_bug.cgi?id=1129471
Cc: David Howells <[email protected]>
Cc: Herbert Xu <[email protected]>
Cc: "David S. Miller" <[email protected]>
Signed-off-by: "Lee, Chun-Yi" <[email protected]>
---
crypto/asymmetric_keys/x509_cert_parser.c | 7 +++++++
include/linux/oid_registry.h | 2 ++
2 files changed, 9 insertions(+)

diff --git a/crypto/asymmetric_keys/x509_cert_parser.c b/crypto/asymmetric_keys/x509_cert_parser.c
index 991f4d735a4e..bbd22d5c5b5d 100644
--- a/crypto/asymmetric_keys/x509_cert_parser.c
+++ b/crypto/asymmetric_keys/x509_cert_parser.c
@@ -192,6 +192,8 @@ int x509_note_pkey_algo(void *context, size_t hdrlen,
pr_debug("PubKey Algo: %u\n", ctx->last_oid);

switch (ctx->last_oid) {
+ case OID_sha1WithRSASignature:
+ pr_info("1.3.14.3.2.29 sha1WithRSASignature is obsolete.\n");
case OID_md2WithRSAEncryption:
case OID_md3WithRSAEncryption:
default:
@@ -464,6 +466,11 @@ int x509_process_extension(void *context, size_t hdrlen,
return 0;
}

+ if (ctx->last_oid == OID_subjectKeyIdentifier_obsolete) {
+ pr_info("2.5.29.1 subjectKeyIdentifier OID is obsolete.\n");
+ return -ENOPKG;
+ }
+
return 0;
}

diff --git a/include/linux/oid_registry.h b/include/linux/oid_registry.h
index d2fa9ca42e9a..0641d5aa2251 100644
--- a/include/linux/oid_registry.h
+++ b/include/linux/oid_registry.h
@@ -62,6 +62,7 @@ enum OID {

OID_certAuthInfoAccess, /* 1.3.6.1.5.5.7.1.1 */
OID_sha1, /* 1.3.14.3.2.26 */
+ OID_sha1WithRSASignature, /* 1.3.14.3.2.29 */
OID_sha256, /* 2.16.840.1.101.3.4.2.1 */
OID_sha384, /* 2.16.840.1.101.3.4.2.2 */
OID_sha512, /* 2.16.840.1.101.3.4.2.3 */
@@ -83,6 +84,7 @@ enum OID {
OID_generationalQualifier, /* 2.5.4.44 */

/* Certificate extension IDs */
+ OID_subjectKeyIdentifier_obsolete, /* 2.5.29.1 */
OID_subjectKeyIdentifier, /* 2.5.29.14 */
OID_keyUsage, /* 2.5.29.15 */
OID_subjectAltName, /* 2.5.29.17 */
--
2.16.4

2019-03-27 19:37:33

by Mimi Zohar

Subject: Re: [PATCH] X.509: Add messages for obsolete OIDs

On Fri, 2019-03-22 at 14:27 +0800, Lee, Chun-Yi wrote:
> We found that the db in Acer machine has self signed certificates
> (CN=DisablePW or CN=ABO) that they used obsolete OID 1.3.14.3.2.29
> sha1WithRSASignature and 2.5.29.1 subjectKeyIdentifier. Kernel
> emits -65 error code when loading those certificates to platform
> keyring:
>
> [ 1.484388] integrity: Loading X.509 certificate: UEFI:MokListRT
> [ 1.485557] integrity: Problem loading X.509 certificate -65
> [ 1.486100] Error adding keys to platform keyring UEFI:MokListRT
>
> Because the -65 error code is not enough for appeasing user when
> loading a outdated certificate. This patch add messages against
> 1.3.14.3.2.29 and 2.5.29.1 OIDs.
>
> Link: https://bugzilla.opensuse.org/show_bug.cgi?id=1129471
> Cc: David Howells <[email protected]>
> Cc: Herbert Xu <[email protected]>
> Cc: "David S. Miller" <[email protected]>
> Signed-off-by: "Lee, Chun-Yi" <[email protected]>

Reviewed-by: Mimi Zohar <[email protected]>

> ---
> crypto/asymmetric_keys/x509_cert_parser.c | 7 +++++++
> include/linux/oid_registry.h | 2 ++
> 2 files changed, 9 insertions(+)
>
> diff --git a/crypto/asymmetric_keys/x509_cert_parser.c b/crypto/asymmetric_keys/x509_cert_parser.c
> index 991f4d735a4e..bbd22d5c5b5d 100644
> --- a/crypto/asymmetric_keys/x509_cert_parser.c
> +++ b/crypto/asymmetric_keys/x509_cert_parser.c
> @@ -192,6 +192,8 @@ int x509_note_pkey_algo(void *context, size_t hdrlen,
> pr_debug("PubKey Algo: %u\n", ctx->last_oid);
>
> switch (ctx->last_oid) {
> + case OID_sha1WithRSASignature:
> + pr_info("1.3.14.3.2.29 sha1WithRSASignature is obsolete.\n");
> case OID_md2WithRSAEncryption:
> case OID_md3WithRSAEncryption:
> default:
> @@ -464,6 +466,11 @@ int x509_process_extension(void *context, size_t hdrlen,
> return 0;
> }
>
> + if (ctx->last_oid == OID_subjectKeyIdentifier_obsolete) {
> + pr_info("2.5.29.1 subjectKeyIdentifier OID is obsolete.\n");
> + return -ENOPKG;
> + }
> +
> return 0;
> }
>
> diff --git a/include/linux/oid_registry.h b/include/linux/oid_registry.h
> index d2fa9ca42e9a..0641d5aa2251 100644
> --- a/include/linux/oid_registry.h
> +++ b/include/linux/oid_registry.h
> @@ -62,6 +62,7 @@ enum OID {
>
> OID_certAuthInfoAccess, /* 1.3.6.1.5.5.7.1.1 */
> OID_sha1, /* 1.3.14.3.2.26 */
> + OID_sha1WithRSASignature, /* 1.3.14.3.2.29 */
> OID_sha256, /* 2.16.840.1.101.3.4.2.1 */
> OID_sha384, /* 2.16.840.1.101.3.4.2.2 */
> OID_sha512, /* 2.16.840.1.101.3.4.2.3 */
> @@ -83,6 +84,7 @@ enum OID {
> OID_generationalQualifier, /* 2.5.4.44 */
>
> /* Certificate extension IDs */
> + OID_subjectKeyIdentifier_obsolete, /* 2.5.29.1 */
> OID_subjectKeyIdentifier, /* 2.5.29.14 */
> OID_keyUsage, /* 2.5.29.15 */
> OID_subjectAltName, /* 2.5.29.17 */

2019-03-29 17:50:10

by joeyli

Subject: Re: [PATCH] X.509: Add messages for obsolete OIDs

Hi Mimi,

On Wed, Mar 27, 2019 at 03:36:04PM -0400, Mimi Zohar wrote:
> On Fri, 2019-03-22 at 14:27 +0800, Lee, Chun-Yi wrote:
> > We found that the db in Acer machine has self signed certificates
> > (CN=DisablePW or CN=ABO) that they used obsolete OID 1.3.14.3.2.29
> > sha1WithRSASignature and 2.5.29.1 subjectKeyIdentifier. Kernel
> > emits -65 error code when loading those certificates to platform
> > keyring:
> >
> > [ 1.484388] integrity: Loading X.509 certificate: UEFI:MokListRT
> > [ 1.485557] integrity: Problem loading X.509 certificate -65
> > [ 1.486100] Error adding keys to platform keyring UEFI:MokListRT
> >
> > Because the -65 error code is not enough for appeasing user when
> > loading a outdated certificate. This patch add messages against
> > 1.3.14.3.2.29 and 2.5.29.1 OIDs.
> >
> > Link: https://bugzilla.opensuse.org/show_bug.cgi?id=1129471
> > Cc: David Howells <[email protected]>
> > Cc: Herbert Xu <[email protected]>
> > Cc: "David S. Miller" <[email protected]>
> > Signed-off-by: "Lee, Chun-Yi" <[email protected]>
>
> Reviewed-by: Mimi Zohar <[email protected]>

Thanks for your review!

Joey Lee