crypto/fsl: Add command for encapsulating/decapsulating blobs
Freescale's SEC block has built-in Blob Protocol which provides
a method for protecting user-defined data across system power
cycles. SEC block protects data in a data structure called a Blob,
which provides both confidentiality and integrity protection.
Encapsulating data as a blob
Each time that the Blob Protocol is used to protect data, a
different randomly generated key is used to encrypt the data.
This random key is itself encrypted using a key which is derived
from SoC's non volatile secret key and a 16 bit Key identifier.
The resulting encrypted key along with encrypted data is called a blob.
The non volatile secure key is available for use only during secure boot.
During decapsulation, the reverse process is performed to get back
the original data.
Commands added
--------------
blob enc - encapsulating data as a cryptgraphic blob
blob dec - decapsulating cryptgraphic blob to get the data
Commands Syntax
---------------
blob enc src dst len km
Encapsulate and create blob of data $len bytes long
at address $src and store the result at address $dst.
$km is the 16 byte key modifier is also required for
generation/use as key for cryptographic operation. Key
modifier should be 16 byte long.
blob dec src dst len km
Decapsulate the blob of data at address $src and
store result of $len byte at addr $dst.
$km is the 16 byte key modifier is also required for
generation/use as key for cryptographic operation. Key
modifier should be 16 byte long.
Signed-off-by: Ruchika Gupta <ruchika.gupta@freescale.com>
Reviewed-by: York Sun <yorksun@freescale.com>
diff --git a/drivers/crypto/fsl/jobdesc.h b/drivers/crypto/fsl/jobdesc.h
index ed61579..3cf7226 100644
--- a/drivers/crypto/fsl/jobdesc.h
+++ b/drivers/crypto/fsl/jobdesc.h
@@ -11,8 +11,19 @@
#include <common.h>
#include <asm/io.h>
+#define KEY_IDNFR_SZ_BYTES 16
+
void inline_cnstr_jobdesc_hash(uint32_t *desc,
const uint8_t *msg, uint32_t msgsz, uint8_t *digest,
u32 alg_type, uint32_t alg_size, int sg_tbl);
+void inline_cnstr_jobdesc_blob_encap(uint32_t *desc, uint8_t *key_idnfr,
+ uint8_t *plain_txt, uint8_t *enc_blob,
+ uint32_t in_sz);
+
+void inline_cnstr_jobdesc_blob_decap(uint32_t *desc, uint8_t *key_idnfr,
+ uint8_t *enc_blob, uint8_t *plain_txt,
+ uint32_t out_sz);
+
+void inline_cnstr_jobdesc_rng_instantiation(uint32_t *desc);
#endif