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 <dimitri.ledkov@canonical.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

Author: xnox

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

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"