selftests: net: tls: check if FIPS mode is enabled

[ Upstream commit d113c395c67b62fc0d3f2004c0afc406aca0a2b7 ]

TLS selftests use the ChaCha20-Poly1305 and SM4 algorithms, which are not
FIPS compliant. When fips=1, this set of tests fails. Add a check and only
run these tests if not in FIPS mode.

Fixes: 4f336e88a870 ("selftests/tls: add CHACHA20-POLY1305 to tls selftests")
Fixes: e506342a03c7 ("selftests/tls: add SM4 GCM/CCM to tls selftests")
Reviewed-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Magali Lemes <magali.lemes@canonical.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/tools/testing/selftests/net/tls.c b/tools/testing/selftests/net/tls.c
index 2cbb127..c0ad838 100644 (file)
--- a/tools/testing/selftests/net/tls.c
+++ b/tools/testing/selftests/net/tls.c
@@ -25,6 +25,8 @@
 #define TLS_PAYLOAD_MAX_LEN 16384
 #define SOL_TLS 282
 
+static int fips_enabled;
+
 struct tls_crypto_info_keys {
        union {
                struct tls12_crypto_info_aes_gcm_128 aes128;
@@ -235,7 +237,7 @@ FIXTURE_VARIANT(tls)
 {
        uint16_t tls_version;
        uint16_t cipher_type;
-       bool nopad;
+       bool nopad, fips_non_compliant;
 };
 
 FIXTURE_VARIANT_ADD(tls, 12_aes_gcm)
@@ -254,24 +256,28 @@ FIXTURE_VARIANT_ADD(tls, 12_chacha)
 {
        .tls_version = TLS_1_2_VERSION,
        .cipher_type = TLS_CIPHER_CHACHA20_POLY1305,
+       .fips_non_compliant = true,
 };
 
 FIXTURE_VARIANT_ADD(tls, 13_chacha)
 {
        .tls_version = TLS_1_3_VERSION,
        .cipher_type = TLS_CIPHER_CHACHA20_POLY1305,
+       .fips_non_compliant = true,
 };
 
 FIXTURE_VARIANT_ADD(tls, 13_sm4_gcm)
 {
        .tls_version = TLS_1_3_VERSION,
        .cipher_type = TLS_CIPHER_SM4_GCM,
+       .fips_non_compliant = true,
 };
 
 FIXTURE_VARIANT_ADD(tls, 13_sm4_ccm)
 {
        .tls_version = TLS_1_3_VERSION,
        .cipher_type = TLS_CIPHER_SM4_CCM,
+       .fips_non_compliant = true,
 };
 
 FIXTURE_VARIANT_ADD(tls, 12_aes_ccm)
@@ -311,6 +317,9 @@ FIXTURE_SETUP(tls)
        int one = 1;
        int ret;
 
+       if (fips_enabled && variant->fips_non_compliant)
+               SKIP(return, "Unsupported cipher in FIPS mode");
+
        tls_crypto_info_init(variant->tls_version, variant->cipher_type,
                             &tls12);
 
@@ -1820,4 +1829,17 @@ TEST(tls_v6ops) {
        close(sfd);
 }
 
+static void __attribute__((constructor)) fips_check(void) {
+       int res;
+       FILE *f;
+
+       f = fopen("/proc/sys/crypto/fips_enabled", "r");
+       if (f) {
+               res = fscanf(f, "%d", &fips_enabled);
+               if (res != 1)
+                       ksft_print_msg("ERROR: Couldn't read /proc/sys/crypto/fips_enabled\n");
+               fclose(f);
+       }
+}
+
 TEST_HARNESS_MAIN