zkey: Separate and rework CCA host library loading

As preparation for future changes, rework the loading of the
CCA host library so that the exported symbols are not passed
individually to the functions that use it. Pass a structure
that contains all entry points of all loaded CCA functions
instead. This will make it easier to add further CCA functions
at a later time.

Also add a version query for the CCA host library since some
future functions might be dependent on the library version.

While at it, separate the CCA related functions and definitions,
and move them into a separate source file (cca.h/cca.h).

Signed-off-by: Ingo Franzki <ifranzki@linux.ibm.com>
Reviewed-by: Harald Freudenberger <freude@linux.ibm.com>
Signed-off-by: Jan Höppner <hoeppner@linux.ibm.com>

zkey/pkey.h

@@ -82,23 +82,10 @@ struct pkey_verifykey {
 
 #define PKEY_VERIFYKEY _IOWR(PKEY_IOCTL_MAGIC, 0x07, struct pkey_verifykey)
 
-#define METHOD_OLD_TO_CURRENT	"RTCMK   "
-#define METHOD_CURRENT_TO_NEW	"RTNMK   "
-
-typedef void (*t_CSNBKTC)(long *return_code,
-			  long *reason_code,
-			  long *exit_data_length,
-			  unsigned char *exit_data,
-			  long *rule_array_count,
-			  unsigned char *rule_array,
-			  unsigned char *key_identifier);
-
 #define PAES_BLOCK_SIZE             16
 #define ENC_ZERO_LEN                (2 * PAES_BLOCK_SIZE)
 #define VERIFICATION_PATTERN_LEN    (2 * ENC_ZERO_LEN + 1)
 
-int load_cca_library(void **lib_csulcca, t_CSNBKTC *dll_CSNBKTC, bool verbose);
-
 int open_pkey_device(bool verbose);
 
 int generate_secure_key_random(int pkey_fd, const char *keyfile,
@@ -122,10 +109,6 @@ int validate_secure_key(int pkey_fd,
 			size_t *clear_key_bitsize, int *is_old_mk,
 			bool verbose);
 
-int key_token_change(t_CSNBKTC dll_CSNBKTC,
-		     u8 *secure_key, unsigned int secure_key_size,
-		     char *method, bool verbose);
-
 int generate_key_verification_pattern(const char *key, size_t key_size,
 				      char *vp, size_t vp_len, bool verbose);