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.led...@canonical.com>
---
certs/Kconfig | 2 +-
kernel/module/Kconfig | 15 +++++++++++++++
2 files changed, 16 insertions(+), 1 deletion(-)
diff --git a/certs/Kconfig b/certs/Kconfig
index 84582de66b..69d192a32d 100644
--- 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
index 9d7d45525f..0ea1b2970a 100644
--- 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"
--
2.34.1
