From c5de15cbc8a8c87ae9f104e958ee6a374a145724 Mon Sep 17 00:00:00 2001 From: Ruchika Gupta Date: Tue, 7 Oct 2014 15:46:20 +0530 Subject: 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 Reviewed-by: York Sun --- drivers/crypto/fsl/jobdesc.h | 11 +++++++++++ 1 file changed, 11 insertions(+) (limited to 'drivers/crypto/fsl/jobdesc.h') diff --git a/drivers/crypto/fsl/jobdesc.h b/drivers/crypto/fsl/jobdesc.h index ed61579ac0..3cf7226de2 100644 --- a/drivers/crypto/fsl/jobdesc.h +++ b/drivers/crypto/fsl/jobdesc.h @@ -11,8 +11,19 @@ #include #include +#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 -- cgit