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authorEric Biggers <ebiggers@google.com>2019-02-01 10:51:44 +0300
committerHerbert Xu <herbert@gondor.apana.org.au>2019-02-08 10:30:09 +0300
commit5b2706a4d45987dfa9102f9529a8436392526111 (patch)
tree765cac647685de64d941093d3d737000e552aaa4 /crypto
parent3f47a03df6e81174558f4604828851cb600e1db6 (diff)
downloadlinux-5b2706a4d45987dfa9102f9529a8436392526111.tar.xz
crypto: testmgr - introduce CONFIG_CRYPTO_MANAGER_EXTRA_TESTS
To achieve more comprehensive crypto test coverage, I'd like to add fuzz tests that use random data layouts and request flags. To be most effective these tests should be part of testmgr, so they automatically run on every algorithm registered with the crypto API. However, they will take much longer to run than the current tests and therefore will only really be intended to be run by developers, whereas the current tests have a wider audience. Therefore, add a new kconfig option CONFIG_CRYPTO_MANAGER_EXTRA_TESTS that can be set by developers to enable these extra, expensive tests. Similar to the regular tests, also add a module parameter cryptomgr.noextratests to support disabling the tests. Finally, another module parameter cryptomgr.fuzz_iterations is added to control how many iterations the fuzz tests do. Note: for now setting this to 0 will be equivalent to cryptomgr.noextratests=1. But I opted for separate parameters to provide more flexibility to add other types of tests under the "extra tests" category in the future. Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'crypto')
-rw-r--r--crypto/Kconfig10
-rw-r--r--crypto/testmgr.c14
2 files changed, 24 insertions, 0 deletions
diff --git a/crypto/Kconfig b/crypto/Kconfig
index 86960aa53e0f..bbab6bf33519 100644
--- a/crypto/Kconfig
+++ b/crypto/Kconfig
@@ -168,6 +168,16 @@ config CRYPTO_MANAGER_DISABLE_TESTS
Disable run-time self tests that normally take place at
algorithm registration.
+config CRYPTO_MANAGER_EXTRA_TESTS
+ bool "Enable extra run-time crypto self tests"
+ depends on DEBUG_KERNEL && !CRYPTO_MANAGER_DISABLE_TESTS
+ help
+ Enable extra run-time self tests of registered crypto algorithms,
+ including randomized fuzz tests.
+
+ This is intended for developer use only, as these tests take much
+ longer to run than the normal self tests.
+
config CRYPTO_GF128MUL
tristate "GF(2^128) multiplication functions"
help
diff --git a/crypto/testmgr.c b/crypto/testmgr.c
index 0fc9421ddaba..99f84160cb1d 100644
--- a/crypto/testmgr.c
+++ b/crypto/testmgr.c
@@ -43,6 +43,16 @@ static bool notests;
module_param(notests, bool, 0644);
MODULE_PARM_DESC(notests, "disable crypto self-tests");
+#ifdef CONFIG_CRYPTO_MANAGER_EXTRA_TESTS
+static bool noextratests;
+module_param(noextratests, bool, 0644);
+MODULE_PARM_DESC(noextratests, "disable expensive crypto self-tests");
+
+static unsigned int fuzz_iterations = 100;
+module_param(fuzz_iterations, uint, 0644);
+MODULE_PARM_DESC(fuzz_iterations, "number of fuzz test iterations");
+#endif
+
#ifdef CONFIG_CRYPTO_MANAGER_DISABLE_TESTS
/* a perfect nop */
@@ -4103,6 +4113,10 @@ static void testmgr_onetime_init(void)
{
alg_check_test_descs_order();
alg_check_testvec_configs();
+
+#ifdef CONFIG_CRYPTO_MANAGER_EXTRA_TESTS
+ pr_warn("alg: extra crypto tests enabled. This is intended for developer use only.\n");
+#endif
}
static int alg_find_test(const char *alg)