[PATCH v7 1/5] IMA: remove the dependency on CRYPTO_MD5

[THOBY Simon <Simon.THOBY@viveris.fr>]

MD5 is a weak digest algorithm that shouldn't be used for cryptographic
operation. It hinders the efficiency of a patch set that aims to limit
the digests allowed for the extended file attribute namely security.ima.
MD5 is no longer a requirement for IMA, nor should it be used there.

The sole place where we still use the MD5 algorithm inside IMA (setting
the ima_hash algorithm to MD5 if the user supply the 'ima_hash=md5'
parameter on the command line) fails gracefully when CRYPTO_MD5 is not set:
	ima: Can not allocate md5 (reason: -2)
	ima: Allocating md5 failed, going to use default hash algorithm sha256

Remove the CRYPTO_MD5 dependency for IMA.

Reviewed-by: Lakshmi Ramasubramanian <nramas@linux.microsoft.com>
Signed-off-by: Simon Thoby <simon.thoby@viveris.fr>
---
 security/integrity/ima/Kconfig | 1 -
 1 file changed, 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
-- 
2.31.1