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charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: ltp-bounces+ltp=archiver.kernel.org@lists.linux.it Sender: "ltp" From: Andrea Cervesato Test KEYCTL_DH_COMPUTE buffer size query: verify that calling with buflen 0 returns the required output buffer size (256) without writing to userspace. Signed-off-by: Andrea Cervesato --- runtest/syscalls | 1 + testcases/kernel/syscalls/keyctl/.gitignore | 1 + testcases/kernel/syscalls/keyctl/keyctl26.c | 53 +++++++++++++++++++++++++++++ 3 files changed, 55 insertions(+) diff --git a/runtest/syscalls b/runtest/syscalls index 1b059f652..108efa4a8 100644 --- a/runtest/syscalls +++ b/runtest/syscalls @@ -743,6 +743,7 @@ keyctl22 keyctl22 keyctl23 keyctl23 keyctl24 keyctl24 keyctl25 keyctl25 +keyctl26 keyctl26 kcmp01 kcmp01 kcmp02 kcmp02 diff --git a/testcases/kernel/syscalls/keyctl/.gitignore b/testcases/kernel/syscalls/keyctl/.gitignore index 4cf772558..dd282b7ce 100644 --- a/testcases/kernel/syscalls/keyctl/.gitignore +++ b/testcases/kernel/syscalls/keyctl/.gitignore @@ -23,3 +23,4 @@ /keyctl23 /keyctl24 /keyctl25 +/keyctl26 diff --git a/testcases/kernel/syscalls/keyctl/keyctl26.c b/testcases/kernel/syscalls/keyctl/keyctl26.c new file mode 100644 index 000000000..32bc5f393 --- /dev/null +++ b/testcases/kernel/syscalls/keyctl/keyctl26.c @@ -0,0 +1,53 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Copyright (c) 2026 Andrea Cervesato + */ + +/*\ + * Test ``KEYCTL_DH_COMPUTE`` size query of :manpage:`keyctl(2)`. + * + * [Algorithm] + * + * - verify calling ``KEYCTL_DH_COMPUTE`` with ``buflen = 0`` returns required + * buffer size (256) without writing + */ + +#include "keyctl_common.h" +#include "keyctl_dh_data.h" + +static struct keyctl_dh_params *dh_params; + +static void setup(void) +{ + SAFE_KEYCTL(KEYCTL_JOIN_SESSION_KEYRING, 0, 0, 0, 0); + + dh_params->priv = new_user_key("dh_priv", dh_priv, sizeof(dh_priv), + KEY_SPEC_PROCESS_KEYRING); + dh_params->prime = new_user_key("dh_prime", dh_prime, sizeof(dh_prime), + KEY_SPEC_PROCESS_KEYRING); + dh_params->base = new_user_key("dh_base", dh_base, sizeof(dh_base), + KEY_SPEC_PROCESS_KEYRING); +} + +static void run(void) +{ + TST_EXP_VAL(keyctl(KEYCTL_DH_COMPUTE, (unsigned long)dh_params, + (unsigned long)NULL, 0, 0), + (long)sizeof(dh_expected_secret)); +} + +static struct tst_test test = { + .setup = setup, + .test_all = run, + .min_kver = "4.7", + .needs_kconfigs = (const char *[]) { + "CONFIG_KEYS=y", + "CONFIG_KEY_DH_OPERATIONS=y", + "CONFIG_CRYPTO_DH", + NULL + }, + .bufs = (struct tst_buffers []) { + {&dh_params, .size = sizeof(*dh_params)}, + {}, + }, +}; -- 2.51.0 -- Mailing list info: https://lists.linux.it/listinfo/ltp