* [PATCH] image-fit: aligned output of hash calculation
[not found] ` <18c0ee6aef75159bf02480ca6ed6c5ec78ef04db.camel@googlemail.com>
@ 2023-03-20 7:49 ` Christoph Fritz
2023-03-20 10:21 ` [EXT] " Gaurav Jain
2023-03-20 18:40 ` Simon Glass
0 siblings, 2 replies; 3+ messages in thread
From: Christoph Fritz @ 2023-03-20 7:49 UTC (permalink / raw)
To: u-boot; +Cc: Gaurav Jain, Meenakshi Aggarwal
When calculating the hash of a FIT image, the result is being stored in
an unaligned memory location. This causes problems (wrong hash) with the
fsl_hash CAAM engine on i.mx7ulp.
To fix the issue, this patch introduces a use of memalign() to allocate
memory for the hash value so that it is aligned correctly, similar to
what is done in file common/hash.c function hash_command() already.
Signed-off-by: Christoph Fritz <chf.fritz@googlemail.com>
---
boot/image-fit.c | 26 ++++++++++++++++++++++----
1 file changed, 22 insertions(+), 4 deletions(-)
diff --git a/boot/image-fit.c b/boot/image-fit.c
index 0de9180d2bb..c2283431925 100644
--- a/boot/image-fit.c
+++ b/boot/image-fit.c
@@ -24,6 +24,7 @@
#include <mapmem.h>
#include <asm/io.h>
#include <malloc.h>
+#include <asm/cache.h>
#include <asm/global_data.h>
#ifdef CONFIG_DM_HASH
#include <dm.h>
@@ -1263,12 +1264,17 @@ int calculate_hash(const void *data, int data_len, const char *name,
static int fit_image_check_hash(const void *fit, int noffset, const void *data,
size_t size, char **err_msgp)
{
+#ifdef USE_HOSTCC
uint8_t value[FIT_MAX_HASH_LEN];
+#else
+ u8 *value;
+#endif
int value_len;
const char *algo;
uint8_t *fit_value;
int fit_value_len;
int ignore;
+ int ret = 0;
*err_msgp = NULL;
@@ -1292,20 +1298,32 @@ static int fit_image_check_hash(const void *fit, int noffset, const void *data,
return -1;
}
+#ifndef USE_HOSTCC
+ value = memalign(ARCH_DMA_MINALIGN,
+ sizeof(uint32_t) * HASH_MAX_DIGEST_SIZE);
+#endif
+
if (calculate_hash(data, size, algo, value, &value_len)) {
*err_msgp = "Unsupported hash algorithm";
- return -1;
+ ret = -1;
+ goto hash_exit;
}
if (value_len != fit_value_len) {
*err_msgp = "Bad hash value len";
- return -1;
+ ret = -1;
+ goto hash_exit;
} else if (memcmp(value, fit_value, value_len) != 0) {
*err_msgp = "Bad hash value";
- return -1;
+ ret = -1;
+ goto hash_exit;
}
- return 0;
+hash_exit:
+#ifndef USE_HOSTCC
+ unmap_sysmem(value);
+#endif
+ return ret;
}
int fit_image_verify_with_data(const void *fit, int image_noffset,
^ permalink raw reply related [flat|nested] 3+ messages in thread
* RE: [EXT] [PATCH] image-fit: aligned output of hash calculation
2023-03-20 7:49 ` [PATCH] image-fit: aligned output of hash calculation Christoph Fritz
@ 2023-03-20 10:21 ` Gaurav Jain
2023-03-20 18:40 ` Simon Glass
1 sibling, 0 replies; 3+ messages in thread
From: Gaurav Jain @ 2023-03-20 10:21 UTC (permalink / raw)
To: chf.fritz, u-boot; +Cc: Meenakshi Aggarwal
Hi
> -----Original Message-----
> From: Christoph Fritz <chf.fritz@googlemail.com>
> Sent: Monday, March 20, 2023 1:19 PM
> To: u-boot <u-boot@lists.denx.de>
> Cc: Gaurav Jain <gaurav.jain@nxp.com>; Meenakshi Aggarwal
> <meenakshi.aggarwal@nxp.com>
> Subject: [EXT] [PATCH] image-fit: aligned output of hash calculation
>
> Caution: EXT Email
>
> When calculating the hash of a FIT image, the result is being stored in an
> unaligned memory location. This causes problems (wrong hash) with the
> fsl_hash CAAM engine on i.mx7ulp.
>
> To fix the issue, this patch introduces a use of memalign() to allocate memory
> for the hash value so that it is aligned correctly, similar to what is done in file
> common/hash.c function hash_command() already.
>
> Signed-off-by: Christoph Fritz <chf.fritz@googlemail.com>
> ---
> boot/image-fit.c | 26 ++++++++++++++++++++++----
> 1 file changed, 22 insertions(+), 4 deletions(-)
>
> diff --git a/boot/image-fit.c b/boot/image-fit.c index
> 0de9180d2bb..c2283431925 100644
> --- a/boot/image-fit.c
> +++ b/boot/image-fit.c
> @@ -24,6 +24,7 @@
> #include <mapmem.h>
> #include <asm/io.h>
> #include <malloc.h>
> +#include <asm/cache.h>
> #include <asm/global_data.h>
> #ifdef CONFIG_DM_HASH
> #include <dm.h>
> @@ -1263,12 +1264,17 @@ int calculate_hash(const void *data, int data_len,
> const char *name, static int fit_image_check_hash(const void *fit, int noffset,
> const void *data,
> size_t size, char **err_msgp) {
> +#ifdef USE_HOSTCC
> uint8_t value[FIT_MAX_HASH_LEN];
> +#else
> + u8 *value;
> +#endif
> int value_len;
> const char *algo;
> uint8_t *fit_value;
> int fit_value_len;
> int ignore;
> + int ret = 0;
>
> *err_msgp = NULL;
>
> @@ -1292,20 +1298,32 @@ static int fit_image_check_hash(const void *fit, int
> noffset, const void *data,
> return -1;
> }
>
> +#ifndef USE_HOSTCC
> + value = memalign(ARCH_DMA_MINALIGN,
> + sizeof(uint32_t) * HASH_MAX_DIGEST_SIZE);
You can use same macro FIT_MAX_HASH_LEN.
> +#endif
> +
> if (calculate_hash(data, size, algo, value, &value_len)) {
> *err_msgp = "Unsupported hash algorithm";
> - return -1;
> + ret = -1;
> + goto hash_exit;
> }
>
> if (value_len != fit_value_len) {
> *err_msgp = "Bad hash value len";
> - return -1;
> + ret = -1;
> + goto hash_exit;
> } else if (memcmp(value, fit_value, value_len) != 0) {
> *err_msgp = "Bad hash value";
> - return -1;
> + ret = -1;
> + goto hash_exit;
> }
>
> - return 0;
> +hash_exit:
> +#ifndef USE_HOSTCC
> + unmap_sysmem(value);
I think free() is required??
Regards
Gaurav Jain
> +#endif
> + return ret;
> }
>
> int fit_image_verify_with_data(const void *fit, int image_noffset,
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [PATCH] image-fit: aligned output of hash calculation
2023-03-20 7:49 ` [PATCH] image-fit: aligned output of hash calculation Christoph Fritz
2023-03-20 10:21 ` [EXT] " Gaurav Jain
@ 2023-03-20 18:40 ` Simon Glass
1 sibling, 0 replies; 3+ messages in thread
From: Simon Glass @ 2023-03-20 18:40 UTC (permalink / raw)
To: chf.fritz; +Cc: u-boot, Gaurav Jain, Meenakshi Aggarwal
Hi Christopher,
On Mon, 20 Mar 2023 at 20:49, Christoph Fritz <chf.fritz@googlemail.com> wrote:
>
> When calculating the hash of a FIT image, the result is being stored in
> an unaligned memory location. This causes problems (wrong hash) with the
> fsl_hash CAAM engine on i.mx7ulp.
>
> To fix the issue, this patch introduces a use of memalign() to allocate
> memory for the hash value so that it is aligned correctly, similar to
> what is done in file common/hash.c function hash_command() already.
>
> Signed-off-by: Christoph Fritz <chf.fritz@googlemail.com>
> ---
> boot/image-fit.c | 26 ++++++++++++++++++++++----
> 1 file changed, 22 insertions(+), 4 deletions(-)
>
> diff --git a/boot/image-fit.c b/boot/image-fit.c
> index 0de9180d2bb..c2283431925 100644
> --- a/boot/image-fit.c
> +++ b/boot/image-fit.c
> @@ -24,6 +24,7 @@
> #include <mapmem.h>
> #include <asm/io.h>
> #include <malloc.h>
> +#include <asm/cache.h>
> #include <asm/global_data.h>
> #ifdef CONFIG_DM_HASH
> #include <dm.h>
> @@ -1263,12 +1264,17 @@ int calculate_hash(const void *data, int data_len, const char *name,
> static int fit_image_check_hash(const void *fit, int noffset, const void *data,
> size_t size, char **err_msgp)
> {
> +#ifdef USE_HOSTCC
> uint8_t value[FIT_MAX_HASH_LEN];
> +#else
> + u8 *value;
> +#endif
Could you use tools_build() instead of an #ifdef, e.g.
u8 value_s[FIT_MAX_HASH_LEN], value = value_s;
if (!tools_build())
value = memalign(ARCH_DMA_MINALIGN,
sizeof(uint32_t) * HASH_MAX_DIGEST_SIZE);
> uint8_t value[FIT_MAX_HASH_LEN];
> int value_len;
> const char *algo;
> uint8_t *fit_value;
> int fit_value_len;
> int ignore;
> + int ret = 0;
>
> *err_msgp = NULL;
>
> @@ -1292,20 +1298,32 @@ static int fit_image_check_hash(const void *fit, int noffset, const void *data,
> return -1;
> }
>
> +#ifndef USE_HOSTCC
> + value = memalign(ARCH_DMA_MINALIGN,
> + sizeof(uint32_t) * HASH_MAX_DIGEST_SIZE);
> +#endif
> +
> if (calculate_hash(data, size, algo, value, &value_len)) {
> *err_msgp = "Unsupported hash algorithm";
> - return -1;
> + ret = -1;
> + goto hash_exit;
> }
>
> if (value_len != fit_value_len) {
> *err_msgp = "Bad hash value len";
> - return -1;
> + ret = -1;
> + goto hash_exit;
> } else if (memcmp(value, fit_value, value_len) != 0) {
> *err_msgp = "Bad hash value";
> - return -1;
> + ret = -1;
> + goto hash_exit;
> }
>
> - return 0;
> +hash_exit:
> +#ifndef USE_HOSTCC
> + unmap_sysmem(value);
> +#endif
> + return ret;
> }
>
> int fit_image_verify_with_data(const void *fit, int image_noffset,
>
Regards,
Simon
^ permalink raw reply [flat|nested] 3+ messages in thread
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2023-03-20 7:49 ` [PATCH] image-fit: aligned output of hash calculation Christoph Fritz
2023-03-20 10:21 ` [EXT] " Gaurav Jain
2023-03-20 18:40 ` Simon Glass
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