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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> |
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.. | ||
bios_emulator | ||
block | ||
bootcount | ||
core | ||
crypto | ||
ddr/fsl | ||
demo | ||
dfu | ||
dma | ||
fpga | ||
gpio | ||
hwmon | ||
i2c | ||
input | ||
memory | ||
misc | ||
mmc | ||
mtd | ||
net | ||
pci | ||
pcmcia | ||
power | ||
pwm | ||
qe | ||
rtc | ||
serial | ||
sound | ||
spi | ||
tpm | ||
twserial | ||
usb | ||
video | ||
watchdog | ||
Kconfig | ||
Makefile |