module: enable automatic module signing with FIPS 202 SHA-3

Add Kconfig options to use SHA-3 for kernel module signing. 256 size for RSA only, and higher sizes for RSA and NIST P-384. Signed-off-by: Dimitri John Ledkov <[email protected]> Signed-off-by: Herbert Xu <[email protected]>
wafgo · Oct 27, 2023 · 446b1e0 · 446b1e0
1 parent fdb4f66
commit 446b1e0
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Showing 2 changed files with 16 additions and 1 deletion.
diff --git a/certs/Kconfig b/certs/Kconfig
@@ -30,7 +30,7 @@ config MODULE_SIG_KEY_TYPE_RSA
 config MODULE_SIG_KEY_TYPE_ECDSA
 	bool "ECDSA"
 	select CRYPTO_ECDSA
-	depends on MODULE_SIG_SHA384 || MODULE_SIG_SHA512
+	depends on !(MODULE_SIG_SHA256 || MODULE_SIG_SHA3_256)
 	help
 	 Use an elliptic curve key (NIST P384) for module signing. Use
 	 a strong hash of same or higher bit length, i.e. sha384 or

diff --git a/kernel/module/Kconfig b/kernel/module/Kconfig
@@ -248,6 +248,18 @@ config MODULE_SIG_SHA512
 	bool "Sign modules with SHA-512"
 	select CRYPTO_SHA512
 
+config MODULE_SIG_SHA3_256
+	bool "Sign modules with SHA3-256"
+	select CRYPTO_SHA3
+
+config MODULE_SIG_SHA3_384
+	bool "Sign modules with SHA3-384"
+	select CRYPTO_SHA3
+
+config MODULE_SIG_SHA3_512
+	bool "Sign modules with SHA3-512"
+	select CRYPTO_SHA3
+
 endchoice
 
 config MODULE_SIG_HASH
@@ -256,6 +268,9 @@ config MODULE_SIG_HASH
 	default "sha256" if MODULE_SIG_SHA256
 	default "sha384" if MODULE_SIG_SHA384
 	default "sha512" if MODULE_SIG_SHA512
+	default "sha3-256" if MODULE_SIG_SHA3_256
+	default "sha3-384" if MODULE_SIG_SHA3_384
+	default "sha3-512" if MODULE_SIG_SHA3_512
 
 choice
 	prompt "Module compression mode"