[RFC PATCH v3 04/13] keys: Add new verification type (VERIFYING_CLAVIS_SIGNATURE)

[Eric Snowberg]

Add a new verification type called VERIFYING_CLAVIS_SIGNATURE.  This new
usage will be used for validating keys added to the new clavis LSM keyring.
This will be introduced in a follow-on patch.

Signed-off-by: Eric Snowberg <eric.snowb...@oracle.com>
---
 crypto/asymmetric_keys/asymmetric_type.c | 1 +
 crypto/asymmetric_keys/pkcs7_verify.c    | 1 +
 include/linux/verification.h             | 2 ++
 3 files changed, 4 insertions(+)

diff --git a/crypto/asymmetric_keys/asymmetric_type.c 
b/crypto/asymmetric_keys/asymmetric_type.c
index 43af5fa510c0..d7bf95c77f4a 100644
--- a/crypto/asymmetric_keys/asymmetric_type.c
+++ b/crypto/asymmetric_keys/asymmetric_type.c
@@ -25,6 +25,7 @@ const char *const key_being_used_for[NR__KEY_BEING_USED_FOR] 
= {
        [VERIFYING_KEY_SIGNATURE]               = "key sig",
        [VERIFYING_KEY_SELF_SIGNATURE]          = "key self sig",
        [VERIFYING_UNSPECIFIED_SIGNATURE]       = "unspec sig",
+       [VERIFYING_CLAVIS_SIGNATURE]            = "clavis sig",
 };
 EXPORT_SYMBOL_GPL(key_being_used_for);
 
diff --git a/crypto/asymmetric_keys/pkcs7_verify.c 
b/crypto/asymmetric_keys/pkcs7_verify.c
index f0d4ff3c20a8..1dc80e68ce96 100644
--- a/crypto/asymmetric_keys/pkcs7_verify.c
+++ b/crypto/asymmetric_keys/pkcs7_verify.c
@@ -428,6 +428,7 @@ int pkcs7_verify(struct pkcs7_message *pkcs7,
                }
                /* Authattr presence checked in parser */
                break;
+       case VERIFYING_CLAVIS_SIGNATURE:
        case VERIFYING_UNSPECIFIED_SIGNATURE:
                if (pkcs7->data_type != OID_data) {
                        pr_warn("Invalid unspecified sig (not pkcs7-data)\n");
diff --git a/include/linux/verification.h b/include/linux/verification.h
index cb2d47f28091..02d2d70e2324 100644
--- a/include/linux/verification.h
+++ b/include/linux/verification.h
@@ -36,6 +36,8 @@ enum key_being_used_for {
        VERIFYING_KEY_SIGNATURE,
        VERIFYING_KEY_SELF_SIGNATURE,
        VERIFYING_UNSPECIFIED_SIGNATURE,
+       /* Add new entries above, keep VERIFYING_CLAVIS_SIGNATURE at the end. */
+       VERIFYING_CLAVIS_SIGNATURE,
        NR__KEY_BEING_USED_FOR
 };
 extern const char *const key_being_used_for[NR__KEY_BEING_USED_FOR];
-- 
2.45.0