[LTP] [PATCH v3 28/36] keyctl32: Test KEYCTL_PKEY_SIGN and VERIFY

[Cyril Hrubis]

Hi!
> +/*\
> + * Test ``KEYCTL_PKEY_SIGN`` and ``KEYCTL_PKEY_VERIFY`` of :manpage:`keyctl(2)`.
> + *
> + * ``KEYCTL_PKEY_SIGN`` signs a digest using an asymmetric private key and
> + * ``KEYCTL_PKEY_VERIFY`` verifies the signature using the matching public key.
> + *
> + * Requires root (CAP_SYS_MODULE) to load the ``x509_key_parser`` and
> + * ``pkcs8_key_parser`` modules.
> + *
> + * [Algorithm]
> + *
> + * - sign a 32-byte digest using an RSA-2048 PKCS#8 private key with
> + *   ``enc=pkcs1 hash=sha256``
> + * - verify the 256-byte signature using the matching X.509 public key
> + * - verify a mismatched digest fails verification with ``EKEYREJECTED``
> + */
> +
> +#include "keyctl_common.h"
> +#include "keyctl_pkey_data.h"
> +#include "tst_module.h"
> +
> +#define DIGEST_SIZE	32
> +#define SIG_SIZE	256
> +
> +static const unsigned char digest[DIGEST_SIZE] = {
> +	0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
> +	0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
> +	0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
> +	0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f,
> +};
> +
> +static unsigned char sig[SIG_SIZE];
> +static unsigned char wrong_digest[DIGEST_SIZE];

Here as well, these buffers should ideally be in the guarded buffers.

Otherwise:

Reviewed-by: Cyril Hrubis <chrubis@suse.cz>

-- 
Cyril Hrubis
chrubis@suse.cz