Re: [PATCH] KEYS: Print digitalSignature and CA link errors

Hi,

Hopefully this is pretty self explanatory, it just increases the diagnostic capabilities of using the keyring erroneously. How do I get someone to look at it?

Regards, Kevin

On Thu, Aug 1, 2024 at 2:02 PM Kevin Bowling kevin.bowling@kev009.com wrote:

ENOKEY is overloaded for several different failure types in these link functions. In addition, by the time we are consuming the return several other methods can return ENOKEY. Add some error prints to help diagnose fundamental certificate issues.

Cc: stable@vger.kernel.org Signed-off-by: Kevin Bowling kevin.bowling@kev009.com

---

crypto/asymmetric_keys/restrict.c | 24 ++++++++++++++++++------ 1 file changed, 18 insertions(+), 6 deletions(-)

diff --git a/crypto/asymmetric_keys/restrict.c b/crypto/asymmetric_keys/restrict.c index afcd4d101ac5..472561e451b3 100644 --- a/crypto/asymmetric_keys/restrict.c +++ b/crypto/asymmetric_keys/restrict.c @@ -140,14 +140,20 @@ int restrict_link_by_ca(struct key *dest_keyring, pkey = payload->data[asym_crypto]; if (!pkey) return -ENOPKG;

•   if (!test_bit(KEY_EFLAG_CA, &pkey->key_eflags))
  

•   if (!test_bit(KEY_EFLAG_CA, &pkey->key_eflags)) {
  

•           pr_err("Missing CA usage bit\n");
            return -ENOKEY;
  

•   if (!test_bit(KEY_EFLAG_KEYCERTSIGN, &pkey->key_eflags))
  

•   }
  

•   if (!test_bit(KEY_EFLAG_KEYCERTSIGN, &pkey->key_eflags)) {
  

•           pr_err("Missing keyCertSign usage bit\n");
            return -ENOKEY;
  

•   }
    if (!IS_ENABLED(CONFIG_INTEGRITY_CA_MACHINE_KEYRING_MAX))
            return 0;
  

•   if (test_bit(KEY_EFLAG_DIGITALSIG, &pkey->key_eflags))
  

•   if (test_bit(KEY_EFLAG_DIGITALSIG, &pkey->key_eflags)) {
  

•           pr_err("Unexpected digitalSignature usage bit\n");
            return -ENOKEY;
  

•   }
  
    return 0;
  

} @@ -183,14 +189,20 @@ int restrict_link_by_digsig(struct key *dest_keyring, if (!pkey) return -ENOPKG;

•   if (!test_bit(KEY_EFLAG_DIGITALSIG, &pkey->key_eflags))
  

•   if (!test_bit(KEY_EFLAG_DIGITALSIG, &pkey->key_eflags)) {
  

•           pr_err("Missing digitalSignature usage bit\n");
            return -ENOKEY;
  

•   }
  
  

•   if (test_bit(KEY_EFLAG_CA, &pkey->key_eflags))
  

•   if (test_bit(KEY_EFLAG_CA, &pkey->key_eflags)) {
  

•           pr_err("Unexpected CA usage bit\n");
            return -ENOKEY;
  

•   }
  
  

•   if (test_bit(KEY_EFLAG_KEYCERTSIGN, &pkey->key_eflags))
  

•   if (test_bit(KEY_EFLAG_KEYCERTSIGN, &pkey->key_eflags)) {
  

•           pr_err("Unexpected keyCertSign usage bit\n");
            return -ENOKEY;
  

•   }
  
    return restrict_link_by_signature(dest_keyring, type, payload,
                                      trust_keyring);
  

-- 2.46.0