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/include/fsl_sec.h b/include/fsl_sec.h
index 2a26d85..aa850a3 100644
--- a/include/fsl_sec.h
+++ b/include/fsl_sec.h
@@ -29,6 +29,36 @@
/* Security Engine Block (MS = Most Sig., LS = Least Sig.) */
#if CONFIG_SYS_FSL_SEC_COMPAT >= 4
+/* RNG4 TRNG test registers */
+struct rng4tst {
+#define RTMCTL_PRGM 0x00010000 /* 1 -> program mode, 0 -> run mode */
+ u32 rtmctl; /* misc. control register */
+ u32 rtscmisc; /* statistical check misc. register */
+ u32 rtpkrrng; /* poker range register */
+#define RTSDCTL_ENT_DLY_MIN 1200
+#define RTSDCTL_ENT_DLY_MAX 12800
+ union {
+ u32 rtpkrmax; /* PRGM=1: poker max. limit register */
+ u32 rtpkrsq; /* PRGM=0: poker square calc. result register */
+ };
+#define RTSDCTL_ENT_DLY_SHIFT 16
+#define RTSDCTL_ENT_DLY_MASK (0xffff << RTSDCTL_ENT_DLY_SHIFT)
+ u32 rtsdctl; /* seed control register */
+ union {
+ u32 rtsblim; /* PRGM=1: sparse bit limit register */
+ u32 rttotsam; /* PRGM=0: total samples register */
+ };
+ u32 rtfreqmin; /* frequency count min. limit register */
+ union {
+ u32 rtfreqmax; /* PRGM=1: freq. count max. limit register */
+ u32 rtfreqcnt; /* PRGM=0: freq. count register */
+ };
+ u32 rsvd1[40];
+#define RNG_STATE0_HANDLE_INSTANTIATED 0x00000001
+ u32 rdsta; /*RNG DRNG Status Register*/
+ u32 rsvd2[15];
+};
+
typedef struct ccsr_sec {
u32 res0;
u32 mcfgr; /* Master CFG Register */
@@ -53,7 +83,9 @@
u8 res4[0x40];
u32 dar; /* DECO Avail Register */
u32 drr; /* DECO Reset Register */
- u8 res5[0xe78];
+ u8 res5[0x4d8];
+ struct rng4tst rng; /* RNG Registers */
+ u8 res11[0x8a0];
u32 crnr_ms; /* CHA Revision Number Register, MS */
u32 crnr_ls; /* CHA Revision Number Register, LS */
u32 ctpr_ms; /* Compile Time Parameters Register, MS */