keys, trusted: select hash algorithm for TPM2 chips

Added 'hash=' option for selecting the hash algorithm for add_key()
syscall and documentation for it.

Added entry for sm3-256 to the following tables in order to support
TPM_ALG_SM3_256:

* hash_algo_name
* hash_digest_size

Includes support for the following hash algorithms:

* sha1
* sha256
* sha384
* sha512
* sm3-256

Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Tested-by: Colin Ian King <colin.king@canonical.com>
Reviewed-by: James Morris <james.l.morris@oracle.com>
Reviewed-by: Mimi Zohar <zohar@linux.vnet.ibm.com>
Acked-by: Peter Huewe <peterhuewe@gmx.de>

1 files changed, 1 insertions, 0 deletions

diff --git a/include/keys/trusted-type.h b/include/keys/trusted-type.h
index f91ecd9d1bb1..a6a100833ae9 100644
--- a/include/keys/trusted-type.h
+++ b/include/keys/trusted-type.h
@@ -36,6 +36,7 @@ struct trusted_key_options {
         uint32_t pcrinfo_len;
         unsigned char pcrinfo[MAX_PCRINFO_SIZE];
         int pcrlock;
+        uint32_t hash;
 };
 
 extern struct key_type key_type_trusted;