The SHA-1 algorithm is considered a weak hash algorithm and there has been
some movement within certain distros to drop its support completely or at
least drop it from the default behavior. ima-evm-utils uses it as the
default algorithm in case the user doesn't explicitly ask for another
through the --hashalgo/-a option. With that, make SHA-256 the default hash
algorithm instead.
Signed-off-by: Bruno Meneguele <bmeneg@xxxxxxxxxx>
---
README | 2 +-
src/evmctl.c | 2 +-
src/libimaevm.c | 2 +-
3 files changed, 3 insertions(+), 3 deletions(-)
diff --git a/README b/README
index 87cd3b5cd7da..0dc02f551673 100644
--- a/README
+++ b/README
@@ -41,7 +41,7 @@ COMMANDS
OPTIONS
-------
- -a, --hashalgo sha1 (default), sha224, sha256, sha384, sha512
+ -a, --hashalgo sha1, sha224, sha256 (default), sha384, sha512
-s, --imasig make IMA signature
-d, --imahash make IMA hash
-f, --sigfile store IMA signature in .sig file instead of xattr
diff --git a/src/evmctl.c b/src/evmctl.c
index a8065bbe124a..e0e55bc0b122 100644
--- a/src/evmctl.c
+++ b/src/evmctl.c
@@ -2496,7 +2496,7 @@ static void usage(void)
printf(
"\n"
- " -a, --hashalgo sha1 (default), sha224, sha256, sha384, sha512, streebog256, streebog512\n"
+ " -a, --hashalgo sha1, sha224, sha256 (default), sha384, sha512, streebog256, streebog512\n"
" -s, --imasig make IMA signature\n"
" -d, --imahash make IMA hash\n"
" -f, --sigfile store IMA signature in .sig file instead of xattr\n"
diff --git a/src/libimaevm.c b/src/libimaevm.c
index 8e9615796153..f6c72b878d88 100644
--- a/src/libimaevm.c
+++ b/src/libimaevm.c
@@ -88,7 +88,7 @@ static const char *const pkey_hash_algo_kern[PKEY_HASH__LAST] = {
struct libimaevm_params imaevm_params = {
.verbose = LOG_INFO,
.x509 = 1,
- .hash_algo = "sha1",
+ .hash_algo = "sha256",
};
static void __attribute__ ((constructor)) libinit(void);
--
2.31.1
