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| author | Raul Cardenas <Ulises.Cardenas@freescale.com> | 2015-02-27 11:22:06 -0600 |
|---|---|---|
| committer | Stefano Babic <sbabic@denx.de> | 2015-03-02 09:57:06 +0100 |
| commit | 0200020bc2b8192c31dc57c600865267f51bface (patch) | |
| tree | 77e47e958773096b7cb53c20a0c6a1f4d83e46d8 /drivers/crypto/fsl/desc.h | |
| parent | b5cd10b911f632f74e1211ef786989781d2a1ca1 (diff) | |
| download | u-boot-0200020bc2b8192c31dc57c600865267f51bface.tar.gz | |
imx6: Added DEK blob generator command
Freescale's SEC block has built-in Data Encryption
Key(DEK) Blob Protocol which provides a method for
protecting a DEK for non-secure memory storage.
SEC block protects data in a data structure called
a Secret Key Blob, which provides both confidentiality
and integrity protection.
Every time the blob encapsulation is executed,
a AES-256 key is randomly generated to encrypt the DEK.
This key is encrypted with the OTP Secret key
from SoC. The resulting blob consists of the encrypted
AES-256 key, the encrypted DEK, and a 16-bit MAC.
During decapsulation, the reverse process is performed
to get back the original DEK. A caveat to the blob
decapsulation process, is that the DEK is decrypted
in secure-memory and can only be read by FSL SEC HW.
The DEK is used to decrypt data during encrypted boot.
Commands added
--------------
dek_blob - encapsulating DEK as a cryptgraphic blob
Commands Syntax
---------------
dek_blob src dst len
Encapsulate and create blob of a len-bits DEK at
address src and store the result at address dst.
Signed-off-by: Raul Cardenas <Ulises.Cardenas@freescale.com>
Signed-off-by: Nitin Garg <nitin.garg@freescale.com>
Signed-off-by: Ulises Cardenas <ulises.cardenas@freescale.com>
Signed-off-by: Ulises Cardenas-B45798 <Ulises.Cardenas@freescale.com>
Diffstat (limited to 'drivers/crypto/fsl/desc.h')
| -rw-r--r-- | drivers/crypto/fsl/desc.h | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/crypto/fsl/desc.h b/drivers/crypto/fsl/desc.h index 504f2b07d0..18e2ec8d26 100644 --- a/drivers/crypto/fsl/desc.h +++ b/drivers/crypto/fsl/desc.h @@ -12,11 +12,18 @@ #ifndef DESC_H #define DESC_H +#define KEY_BLOB_SIZE 32 +#define MAC_SIZE 16 + /* Max size of any CAAM descriptor in 32-bit words, inclusive of header */ #define MAX_CAAM_DESCSIZE 64 +/* Size of DEK Blob descriptor, inclusive of header */ +#define DEK_BLOB_DESCSIZE 9 + /* Block size of any entity covered/uncovered with a KEK/TKEK */ #define KEK_BLOCKSIZE 16 + /* * Supported descriptor command types as they show up * inside a descriptor command word. @@ -273,6 +280,13 @@ #define LDLEN_SET_OFIFO_OFFSET_MASK (3 << LDLEN_SET_OFIFO_OFFSET_SHIFT) /* + * AAD Definitions + */ +#define AES_KEY_SHIFT 8 +#define LD_CCM_MODE 0x66 +#define KEY_AES_SRC (0x55 << AES_KEY_SHIFT) + +/* * FIFO_LOAD/FIFO_STORE/SEQ_FIFO_LOAD/SEQ_FIFO_STORE * Command Constructs */ @@ -418,6 +432,7 @@ #define OP_PCLID_MASK (0xff << 16) /* Assuming OP_TYPE = OP_TYPE_UNI_PROTOCOL */ +#define OP_PCLID_SECMEM 0x08 #define OP_PCLID_BLOB (0x0d << OP_PCLID_SHIFT) #define OP_PCLID_SECRETKEY (0x11 << OP_PCLID_SHIFT) #define OP_PCLID_PUBLICKEYPAIR (0x14 << OP_PCLID_SHIFT) |