imx: Kconfig: Reduce default CONFIG_CSF_SIZE
The default CSF_SIZE defined in Kconfig is too high and SPL cannot
fit into the OCRAM in certain cases.
The CSF cannot achieve 0x2000 length when using RSA 4K key which is
the largest key size supported by HABv4.
According to AN12056 "Encrypted Boot on HABv4 and CAAM Enabled Devices"
it's recommended to pad CSF binary to 0x2000 and append DEK blob to
deploy encrypted boot images.
As the maximum DEK blob size is 0x58 we can reduce CSF_SIZE to 0x2060
which should cover both CSF and DEK blob length.
Update default_image.c and image.c to align with this change and avoid
a U-Boot proper authentication failure in HAB closed devices:
Authenticate image from DDR location 0x877fffc0...
bad magic magic=0x32 length=0x6131 version=0x38
bad length magic=0x32 length=0x6131 version=0x38
bad version magic=0x32 length=0x6131 version=0x38
spl: ERROR: image authentication fail
Fixes: 96d27fb218 (Revert "habv4: tools: Avoid hardcoded CSF size for SPL targets")
Reported-by: Jagan Teki <jagan@amarulasolutions.com>
Signed-off-by: Breno Lima <breno.lima@nxp.com>
diff --git a/arch/arm/mach-imx/Kconfig b/arch/arm/mach-imx/Kconfig
index d44f74e..f721eaf 100644
--- a/arch/arm/mach-imx/Kconfig
+++ b/arch/arm/mach-imx/Kconfig
@@ -45,7 +45,7 @@
config CSF_SIZE
hex "Maximum size for Command Sequence File (CSF) binary"
- default 0x4000
+ default 0x2060
help
Define the maximum size for Command Sequence File (CSF) binary
this information is used to define the image boot data.
diff --git a/common/image.c b/common/image.c
index 179eef0..62ba6b3 100644
--- a/common/image.c
+++ b/common/image.c
@@ -61,6 +61,7 @@
#endif /* !USE_HOSTCC*/
#include <u-boot/crc.h>
+#include <imximage.h>
#ifndef CONFIG_SYS_BARGSIZE
#define CONFIG_SYS_BARGSIZE 512
@@ -378,9 +379,9 @@
}
} else if (image_check_type(hdr, IH_TYPE_FIRMWARE_IVT)) {
printf("HAB Blocks: 0x%08x 0x0000 0x%08x\n",
- image_get_load(hdr) - image_get_header_size(),
- image_get_size(hdr) + image_get_header_size()
- - 0x1FE0);
+ image_get_load(hdr) - image_get_header_size(),
+ (int)(image_get_size(hdr) + image_get_header_size()
+ + sizeof(flash_header_v2_t) - 0x2060));
}
}
diff --git a/tools/default_image.c b/tools/default_image.c
index 4b7d1ed..f7990e2 100644
--- a/tools/default_image.c
+++ b/tools/default_image.c
@@ -19,6 +19,7 @@
#include <image.h>
#include <tee/optee.h>
#include <u-boot/crc.h>
+#include <imximage.h>
static image_header_t header;
@@ -106,7 +107,9 @@
if (params->type == IH_TYPE_FIRMWARE_IVT)
/* Add size of CSF minus IVT */
- imagesize = sbuf->st_size - sizeof(image_header_t) + 0x1FE0;
+ imagesize = sbuf->st_size - sizeof(image_header_t)
+ + 0x2060 - sizeof(flash_header_v2_t);
+
else
imagesize = sbuf->st_size - sizeof(image_header_t);