linux-kernel - [RFC PATCH v3 04/13] keys: Add new verification type (VERIFYING_CLAVIS

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Message-ID: <20241017155516.2582369-5-eric.snowberg@oracle.com>
Date: Thu, 17 Oct 2024 09:55:07 -0600
From: Eric Snowberg <eric.snowberg@...cle.com>
To: linux-security-module@...r.kernel.org
Cc: dhowells@...hat.com, dwmw2@...radead.org, herbert@...dor.apana.org.au,
        davem@...emloft.net, ardb@...nel.org, jarkko@...nel.org,
        paul@...l-moore.com, jmorris@...ei.org, serge@...lyn.com,
        zohar@...ux.ibm.com, roberto.sassu@...wei.com,
        dmitry.kasatkin@...il.com, mic@...ikod.net, casey@...aufler-ca.com,
        stefanb@...ux.ibm.com, eric.snowberg@...cle.com, ebiggers@...nel.org,
        rdunlap@...radead.org, linux-kernel@...r.kernel.org,
        keyrings@...r.kernel.org, linux-crypto@...r.kernel.org,
        linux-efi@...r.kernel.org, linux-integrity@...r.kernel.org
Subject: [RFC PATCH v3 04/13] keys: Add new verification type (VERIFYING_CLAVIS_SIGNATURE)

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.snowberg@...cle.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