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From: THOBY Simon <Simon.THOBY@viveris.fr>
To: "zohar@linux.ibm.com" <zohar@linux.ibm.com>,
	"dmitry.kasatkin@gmail.com" <dmitry.kasatkin@gmail.com>,
	"linux-integrity@vger.kernel.org"
	<linux-integrity@vger.kernel.org>,
	BARVAUX Didier <Didier.BARVAUX@viveris.fr>
Cc: THOBY Simon <Simon.THOBY@viveris.fr>
Subject: [PATCH v4 1/5] IMA: remove the dependency on CRYPTO_MD5
Date: Tue, 27 Jul 2021 16:33:33 +0000	[thread overview]
Message-ID: <20210727163330.790010-2-simon.thoby@viveris.fr> (raw)
In-Reply-To: <20210727163330.790010-1-simon.thoby@viveris.fr>

Remove the CRYPTO_MD5 dependency for IMA, as it is not necessary
and it hinders the efficiency of a patchset that limit the digests
allowed for the security.ima xattr.

Signed-off-by: Simon Thoby <simon.thoby@viveris.fr>
---
 security/integrity/ima/Kconfig    | 1 -
 security/integrity/ima/ima_main.c | 2 ++
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/security/integrity/ima/Kconfig b/security/integrity/ima/Kconfig
index d0ceada99243..f3a9cc201c8c 100644
--- a/security/integrity/ima/Kconfig
+++ b/security/integrity/ima/Kconfig
@@ -6,7 +6,6 @@ config IMA
 	select SECURITYFS
 	select CRYPTO
 	select CRYPTO_HMAC
-	select CRYPTO_MD5
 	select CRYPTO_SHA1
 	select CRYPTO_HASH_INFO
 	select TCG_TPM if HAS_IOMEM && !UML
diff --git a/security/integrity/ima/ima_main.c b/security/integrity/ima/ima_main.c
index 287b90509006..d171764230b7 100644
--- a/security/integrity/ima/ima_main.c
+++ b/security/integrity/ima/ima_main.c
@@ -53,8 +53,10 @@ static int __init hash_setup(char *str)
 	if (strcmp(template_desc->name, IMA_TEMPLATE_IMA_NAME) == 0) {
 		if (strncmp(str, "sha1", 4) == 0) {
 			ima_hash_algo = HASH_ALGO_SHA1;
+#ifdef CONFIG_CRYPTO_MD5
 		} else if (strncmp(str, "md5", 3) == 0) {
 			ima_hash_algo = HASH_ALGO_MD5;
+#endif
 		} else {
 			pr_err("invalid hash algorithm \"%s\" for template \"%s\"",
 				str, IMA_TEMPLATE_IMA_NAME);
-- 
2.31.1

  reply	other threads:[~2021-07-27 16:33 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-27 16:33 [PATCH v4 0/5] IMA: restrict the accepted digest algorithms for THOBY Simon
2021-07-27 16:33 ` THOBY Simon [this message]
2021-07-27 17:57   ` [PATCH v4 1/5] IMA: remove the dependency on CRYPTO_MD5 Mimi Zohar
2021-07-27 16:33 ` [PATCH v4 2/5] IMA: block writes of the security.ima xattr with unsupported algorithms THOBY Simon
2021-07-27 20:32   ` Mimi Zohar
2021-07-28  7:00     ` THOBY Simon
2021-07-28 12:43       ` Mimi Zohar
2021-07-28 12:53         ` THOBY Simon
2021-07-28 13:09           ` Mimi Zohar
2021-07-27 16:33 ` [PATCH v4 3/5] IMA: add support to restrict the hash algorithms used for file appraisal THOBY Simon
2021-07-27 20:38   ` Mimi Zohar
2021-07-27 16:33 ` [PATCH v4 4/5] IMA: add a policy option to restrict xattr hash algorithms on appraisal THOBY Simon
2021-07-27 21:07   ` Mimi Zohar
2021-07-27 16:33 ` [PATCH v4 5/5] IMA: introduce a new policy option func=SETXATTR_CHECK THOBY Simon
2021-07-27 17:25   ` Mimi Zohar
2021-07-27 17:58     ` THOBY Simon
2021-07-27 17:47 ` [PATCH v4 0/5] IMA: restrict the accepted digest algorithms for Mimi Zohar

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