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authorAneesh Bansal <aneesh.bansal@freescale.com>2015-12-08 14:14:15 +0530
committerYork Sun <york.sun@nxp.com>2016-01-25 08:24:16 -0800
commitb055a0fd867b11e40944b3414026d37ea00e0840 (patch)
treecb0f6e9a68c69aad67f0175387267d158e5f69db /board/freescale
parent6629261ddd9d78c3cd8193b05c00a2a9bdc74796 (diff)
SECURE BOOT: support for validation of dynamic image
Some images to be validated are relocated to a dynamic address at run time. So, these addresses cannot be known befor hand while signing the images and creating the header offline. So, support is required to pass the image address to the validate function as an argument. If an address is provided to the function, the address field in Header is not read and is treated as a reserved field. Signed-off-by: Saksham Jain <saksham@freescale.com> Signed-off-by: Aneesh Bansal <aneesh.bansal@freescale.com> Acked-by: Ruchika Gupta <ruchika.gupta@nxp.com> Reviewed-by: York Sun <york.sun@nxp.com>
Diffstat (limited to 'board/freescale')
-rw-r--r--board/freescale/common/cmd_esbc_validate.c10
-rw-r--r--board/freescale/common/fsl_validate.c33
2 files changed, 27 insertions, 16 deletions
diff --git a/board/freescale/common/cmd_esbc_validate.c b/board/freescale/common/cmd_esbc_validate.c
index ae6a9af14c..ca7c73755e 100644
--- a/board/freescale/common/cmd_esbc_validate.c
+++ b/board/freescale/common/cmd_esbc_validate.c
@@ -22,7 +22,7 @@ static int do_esbc_validate(cmd_tbl_t *cmdtp, int flag, int argc,
char * const argv[])
{
char *hash_str = NULL;
- ulong haddr;
+ uintptr_t haddr;
int ret;
if (argc < 2)
@@ -32,9 +32,13 @@ static int do_esbc_validate(cmd_tbl_t *cmdtp, int flag, int argc,
hash_str = argv[2];
/* First argument - header address -32/64bit */
- haddr = simple_strtoul(argv[1], NULL, 16);
+ haddr = (uintptr_t)simple_strtoul(argv[1], NULL, 16);
- ret = fsl_secboot_validate(haddr, hash_str);
+ /* With esbc_validate command, Image address must be
+ * part of header. So, the function is called
+ * by passing this argument as 0.
+ */
+ ret = fsl_secboot_validate(haddr, hash_str, 0);
if (ret)
return 1;
diff --git a/board/freescale/common/fsl_validate.c b/board/freescale/common/fsl_validate.c
index 08a2f7960d..de40081a7b 100644
--- a/board/freescale/common/fsl_validate.c
+++ b/board/freescale/common/fsl_validate.c
@@ -536,13 +536,8 @@ static int calc_esbchdr_esbc_hash(struct fsl_secboot_img_priv *img)
return ret;
/* Update hash for actual Image */
-#ifdef CONFIG_ESBC_ADDR_64BIT
ret = algo->hash_update(algo, ctx,
- (u8 *)(uintptr_t)img->hdr.pimg64, img->hdr.img_size, 1);
-#else
- ret = algo->hash_update(algo, ctx,
- (u8 *)(uintptr_t)img->hdr.pimg, img->hdr.img_size, 1);
-#endif
+ (u8 *)img->img_addr, img->img_size, 1);
if (ret)
return ret;
@@ -632,16 +627,25 @@ static int read_validate_esbc_client_header(struct fsl_secboot_img_priv *img)
if (memcmp(hdr->barker, barker_code, ESBC_BARKER_LEN))
return ERROR_ESBC_CLIENT_HEADER_BARKER;
-#ifdef CONFIG_ESBC_ADDR_64BIT
- sprintf(buf, "%llx", hdr->pimg64);
-#else
- sprintf(buf, "%x", hdr->pimg);
-#endif
+ /* If Image Address is not passed as argument to function,
+ * then Address and Size must be read from the Header.
+ */
+ if (img->img_addr == 0) {
+ #ifdef CONFIG_ESBC_ADDR_64BIT
+ img->img_addr = hdr->pimg64;
+ #else
+ img->img_addr = hdr->pimg;
+ #endif
+ }
+
+ sprintf(buf, "%lx", img->img_addr);
setenv("img_addr", buf);
if (!hdr->img_size)
return ERROR_ESBC_CLIENT_HEADER_IMG_SIZE;
+ img->img_size = hdr->img_size;
+
/* Key checking*/
#ifdef CONFIG_KEY_REVOCATION
if (check_srk(img)) {
@@ -774,7 +778,8 @@ static int calculate_cmp_img_sig(struct fsl_secboot_img_priv *img)
return 0;
}
-int fsl_secboot_validate(ulong haddr, char *arg_hash_str)
+int fsl_secboot_validate(uintptr_t haddr, char *arg_hash_str,
+ uintptr_t img_addr)
{
struct ccsr_sfp_regs *sfp_regs = (void *)(CONFIG_SYS_SFP_ADDR);
ulong hash[SHA256_BYTES/sizeof(ulong)];
@@ -824,9 +829,11 @@ int fsl_secboot_validate(ulong haddr, char *arg_hash_str)
memset(img, 0, sizeof(struct fsl_secboot_img_priv));
+ /* Update the information in Private Struct */
hdr = &img->hdr;
img->ehdrloc = haddr;
- esbc = (u8 *)(uintptr_t)img->ehdrloc;
+ img->img_addr = img_addr;
+ esbc = (u8 *)img->ehdrloc;
memcpy(hdr, esbc, sizeof(struct fsl_secboot_img_hdr));