[cbootimage PATCH v3 0/5] Add RSA signing support

[cbootimage PATCH v3 0/5] Add RSA signing support

[Jimmy Zhang]

1. Address issues found in v2. 
2. Use keyword "RehashBl" instead of "ReSignBl" to re-generate AES hash
   for bootloader (and bct).
3. Add sample scripts to do rsa signing for T210 bootimage.

Jimmy Zhang (5):
  Enable -u | --update option support for t210
  Add support for update pubkey and rsa-pss signatures
  Add support to dump rsa related fields for t210
  Add new configuration keyword "RehashBl"
  Add two sample scripts to do rsa signing for T210 bootimage

 rehash.cfg                 |  1 +
 rsa_priv.pem               | 27 +++++++++++++++++++
 sign-by-update.sh          | 59 +++++++++++++++++++++++++++++++++++++++++
 sign.sh                    | 65 ++++++++++++++++++++++++++++++++++++++++++++++
 src/bct_dump.c             | 38 +++++++++++++++++++++++++++
 src/cbootimage.c           |  9 ++++---
 src/cbootimage.h           |  4 +++
 src/crypto.c               | 34 ++++++++++++++++++++++++
 src/crypto.h               |  6 +++++
 src/data_layout.c          | 52 +++++++++++++++++++++++++++++++++++++
 src/data_layout.h          |  2 ++
 src/parse.c                | 44 +++++++++++++++++++++++++++++++
 src/parse.h                |  5 ++++
 src/set.c                  | 38 +++++++++++++++++++++++++++
 src/set.h                  |  5 ++++
 src/t210/nvbctlib_t210.c   | 39 +++++++++++++++++++++++++++-
 src/t210/nvboot_bct_t210.h |  2 --
 17 files changed, 423 insertions(+), 7 deletions(-)
 create mode 100644 rehash.cfg
 create mode 100644 rsa_priv.pem
 create mode 100755 sign-by-update.sh
 create mode 100755 sign.sh

-- 
1.8.1.5

[cbootimage PATCH v3 1/5] Enable -u | --update option support for t210

[Jimmy Zhang]

Signed-off-by: Jimmy Zhang <jimmzhang-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
---
 src/cbootimage.c | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/src/cbootimage.c b/src/cbootimage.c
index 1dfb719c819b..b62cedc47ec0 100644
--- a/src/cbootimage.c
+++ b/src/cbootimage.c
@@ -79,7 +79,7 @@ usage(void)
 	printf("                          Default: tegra20.\n");
 	printf("    -u|--update           Copy input image data and update bct\n");
 	printf("                          configs into new image file.\n");
-	printf("                          This feature is only for tegra114/124.\n");
+	printf("                          This feature is currently not supported on tegra20/30.\n");
 	printf("    configfile            File with configuration information\n");
 	printf("    inputimage            Input image name. This is required\n");
 	printf("                          if -u|--update option is used.\n");
@@ -169,9 +169,10 @@ process_command_line(int argc, char *argv[], build_image_context *context)
 	/* Record the input image filename if update_image is necessary */
 	if (context->update_image)
 	{
-		if (context->boot_data_version != BOOTDATA_VERSION_T114 &&
-			context->boot_data_version != BOOTDATA_VERSION_T124) {
-			printf("Update image feature is only for Tegra114 and Tegra124.\n");
+		if (context->boot_data_version == BOOTDATA_VERSION_T20 ||
+			context->boot_data_version == BOOTDATA_VERSION_T30) {
+			printf("Update image feature is not supported on"
+				" Tegra20/30.\n");
 			return -EINVAL;
 		}
 
-- 
1.8.1.5

Re: [cbootimage PATCH v3 1/5] Enable -u | --update option support for t210

[Stephen Warren]

On 10/08/2015 01:38 PM, Jimmy Zhang wrote:
> Signed-off-by: Jimmy Zhang <jimmzhang-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>

This one is already applied.

[cbootimage PATCH v3 2/5] Add support for update pubkey and rsa-pss signatures

[Jimmy Zhang]

Create new configuration keywords:
   RsaKeyModulusFile: pubkey modulus
   RsaPssSigBlFile:   bootloader rsa pss signature
   RsaPssSigBctFile:  bct rsa pss signature

Sample Configuration file update_bl_sig.cfg
   RsaKeyModulusFile = pubkey.mod;
   RsaPssSigBlFile = bl.sig;

where pubkey.mod and bl.sig are files that contain the public key
modulus and bootloader's rsa-pss signature respectively.

public key modulus and signature are created through utilities
outside cbootimage.

Command line example:
 $ cbootimage -s tegra210 -u update_bl_sig.cfg image.bin image.bin-bl-signed

Above three new keywords added in this CL are only implemented support
for T210.

Signed-off-by: Jimmy Zhang <jimmzhang-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
---
 src/cbootimage.h           |  4 ++++
 src/parse.c                | 35 +++++++++++++++++++++++++++++++++++
 src/parse.h                |  4 ++++
 src/set.c                  | 38 ++++++++++++++++++++++++++++++++++++++
 src/set.h                  |  5 +++++
 src/t210/nvbctlib_t210.c   | 23 ++++++++++++++++++++++-
 src/t210/nvboot_bct_t210.h |  2 --
 7 files changed, 108 insertions(+), 3 deletions(-)

diff --git a/src/cbootimage.h b/src/cbootimage.h
index 9706b2c1edb8..1ce8af6f6584 100644
--- a/src/cbootimage.h
+++ b/src/cbootimage.h
@@ -49,6 +49,9 @@
 
 #define MAX_MTS_SIZE (4 * 1024 * 1024)
 
+#define ARSE_RSA_MAX_MODULUS_SIZE	2048
+#define ARSE_RSA_PARAM_MAX_BYTES	(ARSE_RSA_MAX_MODULUS_SIZE / 8)
+
 #define NVBOOT_CONFIG_TABLE_SIZE_MAX (10 * 1024)
 
 /*
@@ -60,6 +63,7 @@ typedef enum
 	file_type_bl = 0,
 	file_type_bct,
 	file_type_mts,
+	file_type_bin,
 } file_type;
 
 /*
diff --git a/src/parse.c b/src/parse.c
index 8c9824437393..d2f4016effd8 100644
--- a/src/parse.c
+++ b/src/parse.c
@@ -65,6 +65,8 @@ parse_bootloader(build_image_context *context, parse_token token, char *rest);
 static int
 parse_mts_image(build_image_context *context, parse_token token, char *rest);
 static int
+parse_rsa_param(build_image_context *context, parse_token token, char *rest);
+static int
 parse_value_u32(build_image_context *context, parse_token token, char *rest);
 static int
 parse_value_chipuid(build_image_context *context,
@@ -116,6 +118,9 @@ static parse_item s_top_level_items[] = {
 	{ "ChipUid=",       token_unique_chip_id,	parse_value_chipuid },
 	{ "JtagCtrl=",	    token_secure_jtag_control,	parse_value_u32 },
 	{ "DebugCtrl=",	    token_secure_debug_control,	parse_value_u32 },
+	{ "RsaKeyModulusFile=", token_rsa_key_modulus,	parse_rsa_param },
+	{ "RsaPssSigBlFile=",   token_rsa_pss_sig_bl,	parse_rsa_param },
+	{ "RsaPssSigBctFile=",  token_rsa_pss_sig_bct,	parse_rsa_param },
 	{ NULL, 0, NULL } /* Must be last */
 };
 
@@ -480,6 +485,36 @@ static int parse_mts_image(build_image_context *context,
 }
 
 /*
+ * Parse the given rsa modulus/key/signature file name
+ * then call set_rsa_settings to set proper rsa field.
+ *
+ * @param context	The main context pointer
+ * @param token  	The parse token value
+ * @param rest   	String to parse
+ * @return 0 and 1 for success and failure
+ */
+static int parse_rsa_param(build_image_context *context,
+			parse_token token,
+			char *rest)
+{
+	char filename[MAX_BUFFER];
+
+	assert(context != NULL);
+	assert(rest != NULL);
+
+	if (context->generate_bct != 0)
+		return 0;
+
+	/* Parse the file name. */
+	rest = parse_filename(rest, filename, MAX_BUFFER);
+	if (rest == NULL)
+		return 1;
+
+	/* Parsing has finished - set the bootloader */
+	return set_rsa_param(context, token, filename);
+}
+
+/*
  * Parse the given string and find the array items in config file.
  *
  * @param context	The main context pointer
diff --git a/src/parse.h b/src/parse.h
index ce3f21fb8a31..16242a5c2701 100644
--- a/src/parse.h
+++ b/src/parse.h
@@ -114,6 +114,10 @@ typedef enum
 	token_secure_jtag_control,
 	token_secure_debug_control,
 
+	token_rsa_key_modulus,
+	token_rsa_pss_sig_bl,
+	token_rsa_pss_sig_bct,
+
 	token_nand_clock_divider,
 	token_nand_nand_timing,
 	token_nand_nand_timing2,
diff --git a/src/set.c b/src/set.c
index 73af52111360..6dec0bc8755e 100644
--- a/src/set.c
+++ b/src/set.c
@@ -147,6 +147,44 @@ set_mts_image(build_image_context	*context,
 	context->mts_entry_point = entry_point;
 	return update_mts_image(context);
 }
+
+int
+set_rsa_param(build_image_context *context, parse_token token,
+		char *filename)
+{
+	int	result;
+	u_int8_t *rsa_storage;	/* Holds the rsa param after reading */
+	u_int32_t actual_size;	/* In bytes */
+
+        /* Read the image into memory. */
+	result = read_from_image(filename,
+				0,
+				ARSE_RSA_PARAM_MAX_BYTES,
+				&rsa_storage,
+				&actual_size,
+				file_type_bin);
+
+	if (result) {
+		printf("Error reading file %s.\n", filename);
+		exit(1);
+	}
+
+	if (actual_size != ARSE_RSA_PARAM_MAX_BYTES) {
+		printf("Error: invalid size, file %s.\n", filename);
+		exit(1);
+        }
+
+	if (enable_debug)
+		printf("Updating token %d with file %s\n", (int)token, filename);
+
+	/* set to appropriate bct field */
+	result = g_soc_config->set_value(token,
+			rsa_storage, context->bct);
+
+	free(rsa_storage);
+	return result;
+}
+
 #define DEFAULT()                                                     \
 	default:                                                      \
 		printf("Unexpected token %d at line %d\n",            \
diff --git a/src/set.h b/src/set.h
index 8b9a69b2a950..b38d4cefcb4f 100644
--- a/src/set.h
+++ b/src/set.h
@@ -42,6 +42,11 @@ set_mts_image(build_image_context	*context,
 		u_int32_t	entry_point);
 
 int
+set_rsa_param(build_image_context	*context,
+		parse_token	token,
+		char	*filename);
+
+int
 context_set_value(build_image_context	*context,
 		parse_token	token,
 		void		*value);
diff --git a/src/t210/nvbctlib_t210.c b/src/t210/nvbctlib_t210.c
index 9921bbbe0d2d..91a42ec8367f 100644
--- a/src/t210/nvbctlib_t210.c
+++ b/src/t210/nvbctlib_t210.c
@@ -113,7 +113,10 @@ parse_token t210_root_token_list[] = {
 	token_crypto_length,
 	token_max_bct_search_blks,
 	token_unique_chip_id,
-	token_secure_debug_control
+	token_secure_debug_control,
+	token_rsa_key_modulus,
+	token_rsa_pss_sig_bl,
+	token_rsa_pss_sig_bct
 };
 
 int
@@ -2198,6 +2201,24 @@ t210_bct_set_value(parse_token id, void *data, u_int8_t *bct)
 		memcpy(&bct_ptr->unique_chip_id, data, sizeof(nvboot_ecid));
 		break;
 
+	case token_rsa_key_modulus:
+		memcpy(&bct_ptr->key, data, sizeof(nvboot_rsa_key_modulus));
+		break;
+
+	case token_rsa_pss_sig_bl:
+		/*
+		 * Update bootloader 0 since there is only one copy
+		 * of bootloader being built in.
+		 */
+		memcpy(&bct_ptr->bootloader[0].signature.rsa_pss_sig,
+			data, sizeof(nvboot_rsa_pss_sig));
+		break;
+
+	case token_rsa_pss_sig_bct:
+		memcpy(&bct_ptr->signature.rsa_pss_sig,
+			data, sizeof(nvboot_rsa_pss_sig));
+		break;
+
 	default:
 		return -ENODATA;
 	}
diff --git a/src/t210/nvboot_bct_t210.h b/src/t210/nvboot_bct_t210.h
index 90841f63feb6..c790ee97106d 100644
--- a/src/t210/nvboot_bct_t210.h
+++ b/src/t210/nvboot_bct_t210.h
@@ -94,8 +94,6 @@
  */
 #define NVBOOT_MAX_BCT_SEARCH_BLOCKS	64
 
-#define ARSE_RSA_MAX_MODULUS_SIZE	2048
-
 /**
  * Defines the RSA modulus length in bits and bytes used for PKC secure boot.
  */
-- 
1.8.1.5

[cbootimage PATCH v3 3/5] Add support to dump rsa related fields for t210

[Jimmy Zhang]

Add support to dump rsa pubkey, bct's rsa-pss signature and
bootloader's rsa-pss signature.

Signed-off-by: Jimmy Zhang <jimmzhang-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
---
 src/bct_dump.c           | 38 ++++++++++++++++++++++++++++++++++++++
 src/t210/nvbctlib_t210.c | 16 ++++++++++++++++
 2 files changed, 54 insertions(+)

diff --git a/src/bct_dump.c b/src/bct_dump.c
index be7b85dc72d6..fb1134b1b679 100644
--- a/src/bct_dump.c
+++ b/src/bct_dump.c
@@ -30,6 +30,8 @@ cbootimage_soc_config * g_soc_config;
 static void format_u32_hex8(char const * message, void * data);
 static void format_u32(char const * message, void * data);
 static void format_chipuid(char const * message, void * data);
+static void format_hex_16_bytes(char const * message, void * data);
+static void format_rsa_param(char const * message, void * data);
 
 typedef void (*format_function)(char const * message, void * data);
 
@@ -42,6 +44,7 @@ typedef struct {
 typedef union {
 	u_int32_t val;
 	u_int8_t uid[16];
+	u_int8_t rsa_param[256];
 } param_types;
 
 #define MAX_PARAM_SIZE sizeof(param_types)
@@ -54,6 +57,9 @@ static value_data const values[] = {
 	{ token_odm_data,            "OdmData       = ", format_u32_hex8 },
 	{ token_secure_jtag_control, "JtagCtrl      = ", format_u32_hex8 },
 	{ token_secure_debug_control, "DebugCtrl     = ", format_u32_hex8 },
+	{ token_crypto_hash, 	     "BCT AES Hash  = ", format_hex_16_bytes },
+	{ token_rsa_key_modulus,     "RsaKeyModulus = ", format_rsa_param },
+	{ token_rsa_pss_sig_bct,     "RsaPssSigBct = ", format_rsa_param },
 	{ token_unique_chip_id,      "ChipUid       = ", format_chipuid },
 	{ token_bootloader_used,     "# Bootloader used       = ", format_u32 },
 	{ token_bootloaders_max,     "# Bootloaders max       = ", format_u32 },
@@ -72,6 +78,8 @@ static value_data const bl_values[] = {
 	{ token_bl_load_addr,   "Load address = ", format_u32_hex8 },
 	{ token_bl_entry_point, "Entry point  = ", format_u32_hex8 },
 	{ token_bl_attribute,   "Attributes   = ", format_u32_hex8 },
+	{ token_bl_crypto_hash, "Bl AES Hash  = ", format_hex_16_bytes },
+	{ token_rsa_pss_sig_bl,	"RsaPssSigBl  = ", format_rsa_param },
 };
 
 static value_data const mts_values[] = {
@@ -108,6 +116,36 @@ static void format_chipuid(char const * message, void * data)
 	printf("%s%s;\n", message, uid_str);
 }
 
+static void format_hex_16_bytes(char const * message, void * data)
+{
+	u_int8_t *p_byte = (u_int8_t *)data;
+	int byte_index;
+
+	printf("%s", message);
+	for (byte_index = 0; byte_index < 16; ++byte_index)
+		printf("%02x", *p_byte++);
+
+	printf(";\n");
+}
+
+static void format_rsa_param(char const * message, void * data)
+{
+	u_int8_t *rsa = (u_int8_t *)data;
+	int byte_index;
+
+	printf("%s", message);
+	for (byte_index = 0; byte_index < ARSE_RSA_PARAM_MAX_BYTES;
+					++byte_index) {
+		printf("%02x", *rsa++);
+
+		if ((byte_index + 1) % 64 == 0)
+			printf(";\n");
+	}
+
+	if (byte_index % 64 != 0)
+		printf(";\n");
+}
+
 /*****************************************************************************/
 static void usage(void)
 {
diff --git a/src/t210/nvbctlib_t210.c b/src/t210/nvbctlib_t210.c
index 91a42ec8367f..10e2a4756e1a 100644
--- a/src/t210/nvbctlib_t210.c
+++ b/src/t210/nvbctlib_t210.c
@@ -109,6 +109,8 @@ parse_token t210_root_token_list[] = {
 	token_bootloaders_max,
 	token_bct_size,
 	token_hash_size,
+	token_crypto_hash,
+	token_bl_crypto_hash,
 	token_crypto_offset,
 	token_crypto_length,
 	token_max_bct_search_blks,
@@ -2034,6 +2036,11 @@ t210_getbl_param(u_int32_t set,
 		sizeof(nvboot_hash));
 		break;
 
+	case token_rsa_pss_sig_bl:
+		memcpy(data, &bct_ptr->bootloader[set].signature.rsa_pss_sig,
+			sizeof(nvboot_rsa_pss_sig));
+		break;
+
 	default:
 		return -ENODATA;
 	}
@@ -2130,6 +2137,15 @@ t210_bct_get_value(parse_token id, void *data, u_int8_t *bct)
 		memcpy(data, &(bct_ptr->unique_chip_id), sizeof(nvboot_ecid));
 		break;
 
+	case token_rsa_key_modulus:
+		memcpy(data, &bct_ptr->key, sizeof(nvboot_rsa_key_modulus));
+		break;
+
+	case token_rsa_pss_sig_bct:
+		memcpy(data, &bct_ptr->signature.rsa_pss_sig,
+			sizeof(nvboot_rsa_pss_sig));
+		break;
+
 	case token_reserved_offset:
 		*((u_int32_t *)data) = (u_int8_t *)&(samplebct.reserved)
 				- (u_int8_t *)&samplebct;
-- 
1.8.1.5

Re: [cbootimage PATCH v3 3/5] Add support to dump rsa related fields for t210

[Stephen Warren]

On 10/08/2015 01:38 PM, Jimmy Zhang wrote:
> Add support to dump rsa pubkey, bct's rsa-pss signature and
> bootloader's rsa-pss signature.

> +static void format_rsa_param(char const * message, void * data)
> +{
> +	u_int8_t *rsa = (u_int8_t *)data;
> +	int byte_index;
> +
> +	printf("%s", message);
> +	for (byte_index = 0; byte_index < ARSE_RSA_PARAM_MAX_BYTES;
> +					++byte_index) {
> +		printf("%02x", *rsa++);
> +
> +		if ((byte_index + 1) % 64 == 0)
> +			printf(";\n");
> +	}
> +
> +	if (byte_index % 64 != 0)
> +		printf(";\n");

The calculations related to byte_index changed here, but weren't 
mentioned in the changelog. The new version looks fine though.

[cbootimage PATCH v3 4/5] Add new configuration keyword "RehashBl"

[Jimmy Zhang]

This feature is needed in case an image is updated at later stage
after bootimage has been created.

How to use:
  Add keyword "RehashBl" to configuration file, for example, update.cfg:
    RehashBl;

  Invoke cbootimage to re-calculate bootloader aes hash, for example, for
  bootimage bootloader.bin:
    $ cbootimage -s tegra210 --update update.cfg bootloader.bin bootloader.bin-resigned

  Where bootloader.bin-resigned is the resigned bootimage bootloader.bin

Signed-off-by: Jimmy Zhang <jimmzhang-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
---
 src/crypto.c      | 34 ++++++++++++++++++++++++++++++++++
 src/crypto.h      |  6 ++++++
 src/data_layout.c | 52 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 src/data_layout.h |  2 ++
 src/parse.c       |  9 +++++++++
 src/parse.h       |  1 +
 6 files changed, 104 insertions(+)

diff --git a/src/crypto.c b/src/crypto.c
index 99e9f085763c..d6889cb602c9 100644
--- a/src/crypto.c
+++ b/src/crypto.c
@@ -297,3 +297,37 @@ sign_bct(build_image_context *context,
 	free(hash_buffer);
 	return e;
 }
+
+int
+sign_bl(build_image_context *context,
+	u_int8_t *bootloader,
+	u_int32_t length,
+	u_int32_t image_instance)
+{
+	int e = 0;
+	u_int8_t  *hash_buffer;
+	u_int32_t  hash_size;
+
+	g_soc_config->get_value(token_hash_size,
+			&hash_size, context->bct);
+
+	hash_buffer = calloc(1, hash_size);
+	if (hash_buffer == NULL)
+		return -ENOMEM;
+
+	/* Encrypt and compute hash */
+	if ((e = sign_data_block(bootloader,
+			length,
+			hash_buffer)) != 0)
+		goto fail;
+
+	if ((e = g_soc_config->setbl_param(image_instance,
+				token_bl_crypto_hash,
+				(u_int32_t*)hash_buffer,
+				context->bct)) != 0)
+		goto fail;
+
+ fail:
+	free(hash_buffer);
+	return e;
+}
diff --git a/src/crypto.h b/src/crypto.h
index d7151e0cd191..936ca9c4c0eb 100644
--- a/src/crypto.h
+++ b/src/crypto.h
@@ -44,4 +44,10 @@ sign_data_block(u_int8_t *source,
 		u_int32_t length,
 		u_int8_t *signature);
 
+int
+sign_bl(build_image_context *context,
+	u_int8_t *bootloader,
+	u_int32_t length,
+	u_int32_t image_instance);
+
 #endif /* #ifndef INCLUDED_CRYPTO_H */
diff --git a/src/data_layout.c b/src/data_layout.c
index 082609236724..2975f7d1e0f3 100644
--- a/src/data_layout.c
+++ b/src/data_layout.c
@@ -1065,3 +1065,55 @@ int get_bct_size_from_image(build_image_context *context)
 	context->bct = 0;
 	return bct_size;
 }
+
+int resign_bl(build_image_context *context)
+{
+	int ret;
+	u_int8_t  *buffer, *image;
+	u_int32_t  image_instance = 0;	/* support only one instance */
+	u_int32_t  image_actual_size; /* In bytes */
+	u_int32_t  bl_length;
+	u_int32_t  pages_in_image;
+	u_int32_t  blk_size, page_size, current_blk, current_page;
+	u_int32_t  offset;
+
+	/* read in bl from image */
+	g_soc_config->get_value(token_block_size, &blk_size, context->bct);
+	g_soc_config->get_value(token_page_size, &page_size, context->bct);
+
+	GET_BL_FIELD(image_instance, start_blk, &current_blk);
+	GET_BL_FIELD(image_instance, start_page,  &current_page);
+	GET_BL_FIELD(image_instance, length,  &bl_length);
+
+	offset = current_blk * blk_size +
+			current_page * page_size;
+
+	if (read_from_image(context->input_image_filename,
+				offset, bl_length,
+				&image, &image_actual_size, file_type_bin)) {
+		printf("Error reading image file %s.\n",
+				context->input_image_filename);
+		return -ENOMEM;
+	}
+
+	pages_in_image = ICEIL(image_actual_size, page_size);
+
+	/* Create a local copy of the bl */
+	if ((buffer = malloc(pages_in_image * page_size)) == NULL) {
+		ret = -ENOMEM;
+		goto fail;
+	}
+
+	memset(buffer, 0, pages_in_image * page_size);
+	memcpy(buffer, image, image_actual_size);
+
+	insert_padding(buffer, image_actual_size);
+
+	/* sign bl */
+	ret = sign_bl(context, buffer, image_actual_size, image_instance);
+	free (buffer);
+ fail:
+	free (image);
+	return ret;
+}
+
diff --git a/src/data_layout.h b/src/data_layout.h
index c6e53e61be83..0e6e41fcb24c 100644
--- a/src/data_layout.h
+++ b/src/data_layout.h
@@ -64,4 +64,6 @@ get_bct_size_from_image(build_image_context *context);
 int
 begin_update(build_image_context *context);
 
+int
+resign_bl(build_image_context *context);
 #endif /* #ifndef INCLUDED_DATA_LAYOUT_H */
diff --git a/src/parse.c b/src/parse.c
index d2f4016effd8..a7cfb72fa77c 100644
--- a/src/parse.c
+++ b/src/parse.c
@@ -80,6 +80,8 @@ static int
 parse_dev_param(build_image_context *context, parse_token token, char *rest);
 static int
 parse_sdram_param(build_image_context *context, parse_token token, char *rest);
+static int
+parse_sign_bl(build_image_context *context, parse_token token, char *rest);
 
 static int process_statement(build_image_context *context,
 				char *str,
@@ -121,6 +123,7 @@ static parse_item s_top_level_items[] = {
 	{ "RsaKeyModulusFile=", token_rsa_key_modulus,	parse_rsa_param },
 	{ "RsaPssSigBlFile=",   token_rsa_pss_sig_bl,	parse_rsa_param },
 	{ "RsaPssSigBctFile=",  token_rsa_pss_sig_bct,	parse_rsa_param },
+	{ "RehashBl",       token_sign_bl,		parse_sign_bl },
 	{ NULL, 0, NULL } /* Must be last */
 };
 
@@ -689,6 +692,12 @@ parse_bct_file(build_image_context *context, parse_token token, char *rest)
 	return 0;
 }
 
+static int
+parse_sign_bl(build_image_context *context, parse_token token, char *rest)
+{
+	return resign_bl(context);
+}
+
 static char *
 parse_end_state(char *str, char *uname, int chars_remaining)
 {
diff --git a/src/parse.h b/src/parse.h
index 16242a5c2701..69f7abe1d405 100644
--- a/src/parse.h
+++ b/src/parse.h
@@ -117,6 +117,7 @@ typedef enum
 	token_rsa_key_modulus,
 	token_rsa_pss_sig_bl,
 	token_rsa_pss_sig_bct,
+	token_sign_bl,
 
 	token_nand_clock_divider,
 	token_nand_nand_timing,
-- 
1.8.1.5

Re: [cbootimage PATCH v3 4/5] Add new configuration keyword "RehashBl"

[Stephen Warren]

On 10/08/2015 01:38 PM, Jimmy Zhang wrote:
> This feature is needed in case an image is updated at later stage
> after boo

timage has been created.
>
> How to use:
>    Add keyword "RehashBl" to configuration file, for example, update.cfg:
>      RehashBl;
>
>    Invoke cbootimage to re-calculate bootloader aes hash, for example, for
>    bootimage bootloader.bin:
>      $ cbootimage -s tegra210 --update update.cfg bootloader.bin bootloader.bin-resigned
>
>    Where bootloader.bin-resigned is the resigned bootimage bootloader.bin

> diff --git a/src/data_layout.c b/src/data_layout.c

> +}
> +
> diff --git a/src/data_layout.h b/src/data_layout.h

Now there's an empty line (two \ns) at the end of the file.

[cbootimage PATCH v3 5/5] Add sample shell script to sign bootimage for T210

[Jimmy Zhang]

Sign.sh runs openssl and other linux utilities to generate rsa-pss
signatures for bootloader and bct and inject them into bct directly.

Syntax: sign.sh <bootimage> <rsa_key.pem>

Another way to update signature is to use configuration keyword
"RsaKeyModulusFile", "RsaPssSigBlFile", and "RsaPssSigBctFile". Details
are explained in man page.

Signed-off-by: Jimmy Zhang <jimmzhang-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
---
 rehash.cfg   |  1 +
 rsa_priv.pem | 27 +++++++++++++++++++++++++
 sign.sh      | 65 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 93 insertions(+)
 create mode 100644 rehash.cfg
 create mode 100644 rsa_priv.pem
 create mode 100755 sign.sh

diff --git a/rehash.cfg b/rehash.cfg
new file mode 100644
index 000000000000..c5c741bad536
--- /dev/null
+++ b/rehash.cfg
@@ -0,0 +1 @@
+RehashBl;
diff --git a/rsa_priv.pem b/rsa_priv.pem
new file mode 100644
index 000000000000..cbafc03ba35a
--- /dev/null
+++ b/rsa_priv.pem
@@ -0,0 +1,27 @@
+-----BEGIN RSA PRIVATE KEY-----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+-----END RSA PRIVATE KEY-----
diff --git a/sign.sh b/sign.sh
new file mode 100755
index 000000000000..8f8a353fe19f
--- /dev/null
+++ b/sign.sh
@@ -0,0 +1,65 @@
+IMAGE_FILE=$1
+KEY_FILE=$2
+TARGET_IMAGE=$IMAGE_FILE
+CONFIG_FILE=rehash.cfg
+
+CBOOTIMAGE=src/cbootimage
+BCT_DUMP=src/bct_dump
+OBJCOPY=objcopy
+OPENSSL=openssl
+DD=dd
+RM=rm
+MV=mv
+XXD=xxd
+
+echo " Get rid of all temporary files: *.sig, *.tosig, *.tmp *.mod *.rev"
+$RM -f *.sig *.tosig *.tmp *.mod *.rev
+
+echo " Get bl length "
+BL_LENGTH=`$BCT_DUMP $IMAGE_FILE | grep "Bootloader\[0\].Length" \
+ | awk -F ' ' '{print $4}' | awk -F ';' '{print $1}'`
+
+echo " Extract bootloader to $IMAGE_FILE.bl.tosig, length $BL_LENGTH "
+$DD bs=1 skip=32768 if=$IMAGE_FILE of=$IMAGE_FILE.bl.tosig count=$BL_LENGTH
+
+echo " Calculate rsa signature for bl and save to $IMAGE_FILE.bl.sig"
+$OPENSSL dgst -sha256 -sigopt rsa_padding_mode:pss -sigopt rsa_pss_saltlen:-1 \
+ -sign $KEY_FILE -out $IMAGE_FILE.bl.sig $IMAGE_FILE.bl.tosig
+
+echo " Reverse bl signature to meet tegra soc signature ordering"
+$OBJCOPY -I binary --reverse-bytes=256 $IMAGE_FILE.bl.sig $IMAGE_FILE.bl.sig.rev
+
+echo " Inject bl signature into bct"
+$DD conv=notrunc bs=1 if=$IMAGE_FILE.bl.sig.rev of=$IMAGE_FILE seek=9052 count=256
+
+echo " Update bct aes hash and output to $IMAGE_FILE.tmp"
+$CBOOTIMAGE -s tegra210 -u $CONFIG_FILE $IMAGE_FILE $IMAGE_FILE.tmp
+
+echo " Extract the part of bct which needs to be rsa signed"
+$DD bs=1 if=$IMAGE_FILE.tmp of=$IMAGE_FILE.bct.tosig count=8944 skip=1296
+
+echo " Calculate rsa signature for bct and save to $IMAGE_FILE.bct.sig"
+$OPENSSL dgst -sha256 -sigopt rsa_padding_mode:pss -sigopt rsa_pss_saltlen:-1 \
+ -sign $KEY_FILE -out $IMAGE_FILE.bct.sig $IMAGE_FILE.bct.tosig
+
+echo " Reverse bct signature to meet tegra soc signature ordering"
+$OBJCOPY -I binary --reverse-bytes=256 $IMAGE_FILE.bct.sig $IMAGE_FILE.bct.sig.rev
+
+echo " Inject bct signature into bct"
+$DD conv=notrunc bs=1 if=$IMAGE_FILE.bct.sig.rev of=$IMAGE_FILE.tmp seek=800 count=256
+
+echo " Create public key modulus from key file $KEY_FILE and save to $KEY_FILE.mod"
+$OPENSSL rsa -in $KEY_FILE -noout -modulus -out $KEY_FILE.mod
+# remove prefix and LF
+$DD bs=1 if=$KEY_FILE.mod of=$KEY_FILE.mod.tmp skip=8 count=512
+# convert format from hexdecimal to binary
+$XXD -r -p -l 256 $KEY_FILE.mod.tmp $KEY_FILE.mod.bin
+# reverse byte order"
+$OBJCOPY -I binary --reverse-bytes=256 $KEY_FILE.mod.bin $KEY_FILE.mod.bin.rev
+
+echo " Inject public key modulus into bct"
+$DD conv=notrunc bs=1 if=$KEY_FILE.mod.bin.rev of=$IMAGE_FILE.tmp seek=528 count=256
+
+echo " Copy the signed binary to the target file $TARGET_IMAGE"
+$MV $IMAGE_FILE.tmp $TARGET_IMAGE
+
-- 
1.8.1.5

RE: [cbootimage PATCH v3 5/5] Add sample shell script to sign bootimage for T210

[Jimmy Zhang]

Please ignore this one. It is a mistake.

> -----Original Message-----
> From: Jimmy Zhang [mailto:jimmzhang-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org]
> Sent: Thursday, October 08, 2015 12:38 PM
> To: Allen Martin; Stephen Warren
> Cc: linux-tegra-u79uwXL29TY76Z2rM5mHXA@public.gmane.org; Jimmy Zhang
> Subject: [cbootimage PATCH v3 5/5] Add sample shell script to sign
> bootimage for T210
> 
> Sign.sh runs openssl and other linux utilities to generate rsa-pss signatures
> for bootloader and bct and inject them into bct directly.
> 
> Syntax: sign.sh <bootimage> <rsa_key.pem>
> 
> Another way to update signature is to use configuration keyword
> "RsaKeyModulusFile", "RsaPssSigBlFile", and "RsaPssSigBctFile". Details are
> explained in man page.
> 
> Signed-off-by: Jimmy Zhang <jimmzhang-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
> ---
>  rehash.cfg   |  1 +
>  rsa_priv.pem | 27 +++++++++++++++++++++++++
>  sign.sh      | 65
> ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
> ++
>  3 files changed, 93 insertions(+)
>  create mode 100644 rehash.cfg
>  create mode 100644 rsa_priv.pem
>  create mode 100755 sign.sh
> 
> diff --git a/rehash.cfg b/rehash.cfg
> new file mode 100644
> index 000000000000..c5c741bad536
> --- /dev/null
> +++ b/rehash.cfg
> @@ -0,0 +1 @@
> +RehashBl;
> diff --git a/rsa_priv.pem b/rsa_priv.pem new file mode 100644 index
> 000000000000..cbafc03ba35a
> --- /dev/null
> +++ b/rsa_priv.pem
> @@ -0,0 +1,27 @@
> +-----BEGIN RSA PRIVATE KEY-----
> +MIIEpAIBAAKCAQEAs3Lf87UkomlfVHdw/FEz+owzgO+ZFu6/72qT+jSu7aEDZ
> eZj
> +l2cgTQOnHjlmBYj6KoqwXQmY6ZWPNBT7xDqzGdvimCVRC3OGRee2uD+Itu/
> Qwo1F
> +FOb7v+l3v6lODGqDJ06aIxLicEiqK55dk5z+7dP8yyJ3pRhwiDPE4tNtlLOWgmJ/
> +hENyqBHbMMzg67Qwb+aa89wfq2FRrvGOpfmrKlhqtikDnwJALBfkr7hsZGZO
> szHC
> +ii2L5T3eCaI/me2/VIGlQSjGxmaDkiG/aIZVTuIX/LuOyi4sLXJ9cIFQ7Ty/0PAk
> +6Ia6VyEGETQt6+JeLETX4Zc+XCnfbE/Flhs5PwIDAQABAoIBAQCMcmM/Xc4PY
> 0Ne
> +W6FNicyR0vtYda4u2avVGWg50tP6XiPHtDrMO8V3IV3B9RCZUmzhsOx51NIe
> N5T+
> +IVIvcfXNTmCZzdMRkFhODB3hNLCu5SFRs7mWs3Xj7TlxA3R3mUGPGSDgRJ5
> /XQ/6
> +1ZbNunl38IuQ/SgBShCBOWtmUC4ay+ctm1CzBZ/7AYlauOxdoKiU2nzlwpMrX
> 9+C
> +vaVKRQVYbE7EYJsWKOx6vRPU5Kjoq6StlSW4caG0ReRu9tO+xL7kZnqp1BWl3
> KHw
> +OfzLy1CmwDkV3bKFclRWWPR97nN7F95SUFIJ3bOVjU/K2TKuLtMYPPVdG4C
> BBeB5
> +eK2Qae7ZAoGBAOprwiAvcRNWJ2W5JoCkh0L6AHXx2z+S1Bbt0laz4NyqyfPX
> 2SMl
> +DJRxm/IoYRfwZf7fussI1bG7g4UP8HjfrlAzSEWVgPNMSWftOFzkv4QNr2ySjk0
> /
> +nZRsd+zj2kxhc8ukDhiORkyEEg5gtsEUqbtdZHOiqtkNbKOPD6EGKeP7AoGBA
> MP3
> +q5NUh9pJ2RGSkdKutloXNe0HPI6sjsCX3HHWAaFyqBtXWvRU3fIaMUpGQcP
> aqDCt
> +LhzVoNlPXdeQ7vTkBPtiYQBcs0NPI+58pnD5fgR00yTX/5ZIGKbX0NnpZ3spsQ
> AQ
> +FQTXGy80+JyGMmJCDf32VGC96I9Ey5w49U23kXiNAoGAGEtiqwM/rMlY++n
> cW6ix
> +e/d85LxUBJqq8FVlXyb1PulUVLkh/8pvK1M63jXhGiIH8Aovyar4upq8XqXwPh
> aw
> +cg9ehhegbZaSZProxHfQgVcJvy7RIKBfLGqxYxOaJCBVZ91wuIrGLlfhpyvOxOP
> n
> +U0uyhWluW2BQygKhlAaXgNECgYAKDAif5RWR+3dFj14qjwqKU+ZP4K8aIX6
> wIRkM
> +PQyYWmiD/laLcE5wuycLx85XXD6DQF283LcCbS9CfgvCQm5+9OxEOHx4VvZg
> o8Nk
> +x2XOlK6+lNRlwAyDgU0T3wOPLPQGLMznEqAyK2UToU2z++77tkVdMF9b+Q
> r3V3Q8
> +J80tgQKBgQCW2OHHUfnfRMns/d1sp/QNMag19flOT+IjvZXI5ZMy9yojlpcTSd
> Sq
> +NzaahUZKtEankjMlXw2RHMYrXjtAJgwXlV4rMWxkaqUrVqq99v6M1QNx/SHj
> nVB+
> +SYQ8PZHp0mPk/opRPydP/U5WKDcP10KRuSNRSQmvacD5gzs3B6Jhqg==
> +-----END RSA PRIVATE KEY-----
> diff --git a/sign.sh b/sign.sh
> new file mode 100755
> index 000000000000..8f8a353fe19f
> --- /dev/null
> +++ b/sign.sh
> @@ -0,0 +1,65 @@
> +IMAGE_FILE=$1
> +KEY_FILE=$2
> +TARGET_IMAGE=$IMAGE_FILE
> +CONFIG_FILE=rehash.cfg
> +
> +CBOOTIMAGE=src/cbootimage
> +BCT_DUMP=src/bct_dump
> +OBJCOPY=objcopy
> +OPENSSL=openssl
> +DD=dd
> +RM=rm
> +MV=mv
> +XXD=xxd
> +
> +echo " Get rid of all temporary files: *.sig, *.tosig, *.tmp *.mod *.rev"
> +$RM -f *.sig *.tosig *.tmp *.mod *.rev
> +
> +echo " Get bl length "
> +BL_LENGTH=`$BCT_DUMP $IMAGE_FILE | grep "Bootloader\[0\].Length" \
> + | awk -F ' ' '{print $4}' | awk -F ';' '{print $1}'`
> +
> +echo " Extract bootloader to $IMAGE_FILE.bl.tosig, length $BL_LENGTH "
> +$DD bs=1 skip=32768 if=$IMAGE_FILE of=$IMAGE_FILE.bl.tosig
> +count=$BL_LENGTH
> +
> +echo " Calculate rsa signature for bl and save to $IMAGE_FILE.bl.sig"
> +$OPENSSL dgst -sha256 -sigopt rsa_padding_mode:pss -sigopt
> +rsa_pss_saltlen:-1 \  -sign $KEY_FILE -out $IMAGE_FILE.bl.sig
> +$IMAGE_FILE.bl.tosig
> +
> +echo " Reverse bl signature to meet tegra soc signature ordering"
> +$OBJCOPY -I binary --reverse-bytes=256 $IMAGE_FILE.bl.sig
> +$IMAGE_FILE.bl.sig.rev
> +
> +echo " Inject bl signature into bct"
> +$DD conv=notrunc bs=1 if=$IMAGE_FILE.bl.sig.rev of=$IMAGE_FILE
> +seek=9052 count=256
> +
> +echo " Update bct aes hash and output to $IMAGE_FILE.tmp"
> +$CBOOTIMAGE -s tegra210 -u $CONFIG_FILE $IMAGE_FILE
> $IMAGE_FILE.tmp
> +
> +echo " Extract the part of bct which needs to be rsa signed"
> +$DD bs=1 if=$IMAGE_FILE.tmp of=$IMAGE_FILE.bct.tosig count=8944
> +skip=1296
> +
> +echo " Calculate rsa signature for bct and save to $IMAGE_FILE.bct.sig"
> +$OPENSSL dgst -sha256 -sigopt rsa_padding_mode:pss -sigopt
> +rsa_pss_saltlen:-1 \  -sign $KEY_FILE -out $IMAGE_FILE.bct.sig
> +$IMAGE_FILE.bct.tosig
> +
> +echo " Reverse bct signature to meet tegra soc signature ordering"
> +$OBJCOPY -I binary --reverse-bytes=256 $IMAGE_FILE.bct.sig
> +$IMAGE_FILE.bct.sig.rev
> +
> +echo " Inject bct signature into bct"
> +$DD conv=notrunc bs=1 if=$IMAGE_FILE.bct.sig.rev of=$IMAGE_FILE.tmp
> +seek=800 count=256
> +
> +echo " Create public key modulus from key file $KEY_FILE and save to
> $KEY_FILE.mod"
> +$OPENSSL rsa -in $KEY_FILE -noout -modulus -out $KEY_FILE.mod # remove
> +prefix and LF $DD bs=1 if=$KEY_FILE.mod of=$KEY_FILE.mod.tmp skip=8
> +count=512 # convert format from hexdecimal to binary $XXD -r -p -l 256
> +$KEY_FILE.mod.tmp $KEY_FILE.mod.bin # reverse byte order"
> +$OBJCOPY -I binary --reverse-bytes=256 $KEY_FILE.mod.bin
> +$KEY_FILE.mod.bin.rev
> +
> +echo " Inject public key modulus into bct"
> +$DD conv=notrunc bs=1 if=$KEY_FILE.mod.bin.rev of=$IMAGE_FILE.tmp
> +seek=528 count=256
> +
> +echo " Copy the signed binary to the target file $TARGET_IMAGE"
> +$MV $IMAGE_FILE.tmp $TARGET_IMAGE
> +
> --
> 1.8.1.5

[cbootimage PATCH v3 5/5] Add two sample scripts to do rsa signing for T210 bootimage

[Jimmy Zhang]

sign.sh runs openssl and other linux utilities to generate rsa-pss
signatures for a prebuilt bootimage and inject signatures and rsa
modulus into bct directly.

Syntax: sign.sh <bootimage> <rsa_key.pem>

sign-by-update.sh is similar to sign.sh. The difference is the
signatures update are done by cbootimage with configuration
keywords "RsaKeyModulusFile", "RsaPssSigBlFile", and "RsaPssSigBctFile".
Comparing to sign.sh, this script is relatively simple to be ported
to T124/T114.

Syntax: sign-by-update.sh <bootimage> <rsa_key.pem>

Signed-off-by: Jimmy Zhang <jimmzhang-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
---
 rehash.cfg        |  1 +
 rsa_priv.pem      | 27 +++++++++++++++++++++++
 sign-by-update.sh | 59 ++++++++++++++++++++++++++++++++++++++++++++++++++
 sign.sh           | 65 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 4 files changed, 152 insertions(+)
 create mode 100644 rehash.cfg
 create mode 100644 rsa_priv.pem
 create mode 100755 sign-by-update.sh
 create mode 100755 sign.sh

diff --git a/rehash.cfg b/rehash.cfg
new file mode 100644
index 000000000000..c5c741bad536
--- /dev/null
+++ b/rehash.cfg
@@ -0,0 +1 @@
+RehashBl;
diff --git a/rsa_priv.pem b/rsa_priv.pem
new file mode 100644
index 000000000000..cbafc03ba35a
--- /dev/null
+++ b/rsa_priv.pem
@@ -0,0 +1,27 @@
+-----BEGIN RSA PRIVATE KEY-----
+MIIEpAIBAAKCAQEAs3Lf87UkomlfVHdw/FEz+owzgO+ZFu6/72qT+jSu7aEDZeZj
+l2cgTQOnHjlmBYj6KoqwXQmY6ZWPNBT7xDqzGdvimCVRC3OGRee2uD+Itu/Qwo1F
+FOb7v+l3v6lODGqDJ06aIxLicEiqK55dk5z+7dP8yyJ3pRhwiDPE4tNtlLOWgmJ/
+hENyqBHbMMzg67Qwb+aa89wfq2FRrvGOpfmrKlhqtikDnwJALBfkr7hsZGZOszHC
+ii2L5T3eCaI/me2/VIGlQSjGxmaDkiG/aIZVTuIX/LuOyi4sLXJ9cIFQ7Ty/0PAk
+6Ia6VyEGETQt6+JeLETX4Zc+XCnfbE/Flhs5PwIDAQABAoIBAQCMcmM/Xc4PY0Ne
+W6FNicyR0vtYda4u2avVGWg50tP6XiPHtDrMO8V3IV3B9RCZUmzhsOx51NIeN5T+
+IVIvcfXNTmCZzdMRkFhODB3hNLCu5SFRs7mWs3Xj7TlxA3R3mUGPGSDgRJ5/XQ/6
+1ZbNunl38IuQ/SgBShCBOWtmUC4ay+ctm1CzBZ/7AYlauOxdoKiU2nzlwpMrX9+C
+vaVKRQVYbE7EYJsWKOx6vRPU5Kjoq6StlSW4caG0ReRu9tO+xL7kZnqp1BWl3KHw
+OfzLy1CmwDkV3bKFclRWWPR97nN7F95SUFIJ3bOVjU/K2TKuLtMYPPVdG4CBBeB5
+eK2Qae7ZAoGBAOprwiAvcRNWJ2W5JoCkh0L6AHXx2z+S1Bbt0laz4NyqyfPX2SMl
+DJRxm/IoYRfwZf7fussI1bG7g4UP8HjfrlAzSEWVgPNMSWftOFzkv4QNr2ySjk0/
+nZRsd+zj2kxhc8ukDhiORkyEEg5gtsEUqbtdZHOiqtkNbKOPD6EGKeP7AoGBAMP3
+q5NUh9pJ2RGSkdKutloXNe0HPI6sjsCX3HHWAaFyqBtXWvRU3fIaMUpGQcPaqDCt
+LhzVoNlPXdeQ7vTkBPtiYQBcs0NPI+58pnD5fgR00yTX/5ZIGKbX0NnpZ3spsQAQ
+FQTXGy80+JyGMmJCDf32VGC96I9Ey5w49U23kXiNAoGAGEtiqwM/rMlY++ncW6ix
+e/d85LxUBJqq8FVlXyb1PulUVLkh/8pvK1M63jXhGiIH8Aovyar4upq8XqXwPhaw
+cg9ehhegbZaSZProxHfQgVcJvy7RIKBfLGqxYxOaJCBVZ91wuIrGLlfhpyvOxOPn
+U0uyhWluW2BQygKhlAaXgNECgYAKDAif5RWR+3dFj14qjwqKU+ZP4K8aIX6wIRkM
+PQyYWmiD/laLcE5wuycLx85XXD6DQF283LcCbS9CfgvCQm5+9OxEOHx4VvZgo8Nk
+x2XOlK6+lNRlwAyDgU0T3wOPLPQGLMznEqAyK2UToU2z++77tkVdMF9b+Qr3V3Q8
+J80tgQKBgQCW2OHHUfnfRMns/d1sp/QNMag19flOT+IjvZXI5ZMy9yojlpcTSdSq
+NzaahUZKtEankjMlXw2RHMYrXjtAJgwXlV4rMWxkaqUrVqq99v6M1QNx/SHjnVB+
+SYQ8PZHp0mPk/opRPydP/U5WKDcP10KRuSNRSQmvacD5gzs3B6Jhqg==
+-----END RSA PRIVATE KEY-----
diff --git a/sign-by-update.sh b/sign-by-update.sh
new file mode 100755
index 000000000000..b3f010a41d0e
--- /dev/null
+++ b/sign-by-update.sh
@@ -0,0 +1,59 @@
+IMAGE_FILE=$1
+KEY_FILE=$2
+TARGET_IMAGE=$IMAGE_FILE
+CONFIG_FILE=update.cfg
+
+CBOOTIMAGE=src/cbootimage
+BCT_DUMP=src/bct_dump
+OBJCOPY=objcopy
+OPENSSL=openssl
+DD=dd
+RM=rm
+MV=mv
+XXD=xxd
+
+echo " Get rid of all temporary files: *.sig, *.tosig, *.tmp *.mod *.rev"
+$RM -f *.sig *.tosig *.tmp *.mod *.rev
+
+echo " Get bl length "
+BL_LENGTH=`$BCT_DUMP $IMAGE_FILE | grep "Bootloader\[0\].Length" \
+ | awk -F ' ' '{print $4}' | awk -F ';' '{print $1}'`
+
+echo " Extract bootloader to $IMAGE_FILE.bl.tosig, length $BL_LENGTH "
+$DD bs=1 skip=32768 if=$IMAGE_FILE of=$IMAGE_FILE.bl.tosig count=$BL_LENGTH
+
+echo " Calculate rsa signature for bl and save to $IMAGE_FILE.bl.sig"
+$OPENSSL dgst -sha256 -sigopt rsa_padding_mode:pss -sigopt rsa_pss_saltlen:-1 \
+ -sign $KEY_FILE -out $IMAGE_FILE.bl.sig $IMAGE_FILE.bl.tosig
+
+echo " Reverse bl signature to meet tegra soc signature ordering"
+$OBJCOPY -I binary --reverse-bytes=256 $IMAGE_FILE.bl.sig $IMAGE_FILE.bl.sig.rev
+
+echo "# Update bootloader's rsa signature, aes hash and bct's aes hash"
+echo "RsaPssSigBlFile = $IMAGE_FILE.bl.sig.rev;" > $CONFIG_FILE
+echo "RehashBl;" >> $CONFIG_FILE
+$CBOOTIMAGE -s tegra210 -u $CONFIG_FILE $IMAGE_FILE $IMAGE_FILE.tmp
+
+echo " Extract the part of bct which needs to be rsa signed"
+$DD bs=1 if=$IMAGE_FILE.tmp of=$IMAGE_FILE.bct.tosig count=8944 skip=1296
+
+echo " Calculate rsa signature for bct and save to $IMAGE_FILE.bct.sig"
+$OPENSSL dgst -sha256 -sigopt rsa_padding_mode:pss -sigopt rsa_pss_saltlen:-1 \
+ -sign $KEY_FILE -out $IMAGE_FILE.bct.sig $IMAGE_FILE.bct.tosig
+
+echo " Reverse bct signature to meet tegra soc signature ordering"
+$OBJCOPY -I binary --reverse-bytes=256 $IMAGE_FILE.bct.sig $IMAGE_FILE.bct.sig.rev
+
+echo " Create public key modulus from key file $KEY_FILE and save to $KEY_FILE.mod"
+$OPENSSL rsa -in $KEY_FILE -noout -modulus -out $KEY_FILE.mod
+# remove prefix and LF
+$DD bs=1 if=$KEY_FILE.mod of=$KEY_FILE.mod.tmp skip=8 count=512
+# convert format from hexdecimal to binary
+$XXD -r -p -l 256 $KEY_FILE.mod.tmp $KEY_FILE.mod.bin
+# reverse byte order"
+$OBJCOPY -I binary --reverse-bytes=256 $KEY_FILE.mod.bin $KEY_FILE.mod.bin.rev
+
+echo "# Update bct's rsa signature and modulus"
+echo "RsaPssSigBctFile = $IMAGE_FILE.bct.sig.rev;" > $CONFIG_FILE
+echo "RsaKeyModulusFile = $KEY_FILE.mod.bin.rev;" >> $CONFIG_FILE
+$CBOOTIMAGE -s tegra210 -u $CONFIG_FILE $IMAGE_FILE.tmp $TARGET_IMAGE
diff --git a/sign.sh b/sign.sh
new file mode 100755
index 000000000000..8f8a353fe19f
--- /dev/null
+++ b/sign.sh
@@ -0,0 +1,65 @@
+IMAGE_FILE=$1
+KEY_FILE=$2
+TARGET_IMAGE=$IMAGE_FILE
+CONFIG_FILE=rehash.cfg
+
+CBOOTIMAGE=src/cbootimage
+BCT_DUMP=src/bct_dump
+OBJCOPY=objcopy
+OPENSSL=openssl
+DD=dd
+RM=rm
+MV=mv
+XXD=xxd
+
+echo " Get rid of all temporary files: *.sig, *.tosig, *.tmp *.mod *.rev"
+$RM -f *.sig *.tosig *.tmp *.mod *.rev
+
+echo " Get bl length "
+BL_LENGTH=`$BCT_DUMP $IMAGE_FILE | grep "Bootloader\[0\].Length" \
+ | awk -F ' ' '{print $4}' | awk -F ';' '{print $1}'`
+
+echo " Extract bootloader to $IMAGE_FILE.bl.tosig, length $BL_LENGTH "
+$DD bs=1 skip=32768 if=$IMAGE_FILE of=$IMAGE_FILE.bl.tosig count=$BL_LENGTH
+
+echo " Calculate rsa signature for bl and save to $IMAGE_FILE.bl.sig"
+$OPENSSL dgst -sha256 -sigopt rsa_padding_mode:pss -sigopt rsa_pss_saltlen:-1 \
+ -sign $KEY_FILE -out $IMAGE_FILE.bl.sig $IMAGE_FILE.bl.tosig
+
+echo " Reverse bl signature to meet tegra soc signature ordering"
+$OBJCOPY -I binary --reverse-bytes=256 $IMAGE_FILE.bl.sig $IMAGE_FILE.bl.sig.rev
+
+echo " Inject bl signature into bct"
+$DD conv=notrunc bs=1 if=$IMAGE_FILE.bl.sig.rev of=$IMAGE_FILE seek=9052 count=256
+
+echo " Update bct aes hash and output to $IMAGE_FILE.tmp"
+$CBOOTIMAGE -s tegra210 -u $CONFIG_FILE $IMAGE_FILE $IMAGE_FILE.tmp
+
+echo " Extract the part of bct which needs to be rsa signed"
+$DD bs=1 if=$IMAGE_FILE.tmp of=$IMAGE_FILE.bct.tosig count=8944 skip=1296
+
+echo " Calculate rsa signature for bct and save to $IMAGE_FILE.bct.sig"
+$OPENSSL dgst -sha256 -sigopt rsa_padding_mode:pss -sigopt rsa_pss_saltlen:-1 \
+ -sign $KEY_FILE -out $IMAGE_FILE.bct.sig $IMAGE_FILE.bct.tosig
+
+echo " Reverse bct signature to meet tegra soc signature ordering"
+$OBJCOPY -I binary --reverse-bytes=256 $IMAGE_FILE.bct.sig $IMAGE_FILE.bct.sig.rev
+
+echo " Inject bct signature into bct"
+$DD conv=notrunc bs=1 if=$IMAGE_FILE.bct.sig.rev of=$IMAGE_FILE.tmp seek=800 count=256
+
+echo " Create public key modulus from key file $KEY_FILE and save to $KEY_FILE.mod"
+$OPENSSL rsa -in $KEY_FILE -noout -modulus -out $KEY_FILE.mod
+# remove prefix and LF
+$DD bs=1 if=$KEY_FILE.mod of=$KEY_FILE.mod.tmp skip=8 count=512
+# convert format from hexdecimal to binary
+$XXD -r -p -l 256 $KEY_FILE.mod.tmp $KEY_FILE.mod.bin
+# reverse byte order"
+$OBJCOPY -I binary --reverse-bytes=256 $KEY_FILE.mod.bin $KEY_FILE.mod.bin.rev
+
+echo " Inject public key modulus into bct"
+$DD conv=notrunc bs=1 if=$KEY_FILE.mod.bin.rev of=$IMAGE_FILE.tmp seek=528 count=256
+
+echo " Copy the signed binary to the target file $TARGET_IMAGE"
+$MV $IMAGE_FILE.tmp $TARGET_IMAGE
+
-- 
1.8.1.5

Re: [cbootimage PATCH v3 5/5] Add two sample scripts to do rsa signing for T210 bootimage

[Stephen Warren]

On 10/08/2015 01:38 PM, Jimmy Zhang wrote:
> sign.sh runs openssl and other linux utilities to generate rsa-pss
> signatures for a prebuilt bootimage and inject signatures and rsa
> modulus into bct directly.
>
> Syntax: sign.sh <bootimage> <rsa_key.pem>
>
> sign-by-update.sh is similar to sign.sh. The difference is the
> signatures update are done by cbootimage with configuration
> keywords "RsaKeyModulusFile", "RsaPssSigBlFile", and "RsaPssSigBctFile".
> Comparing to sign.sh, this script is relatively simple to be ported
> to T124/T114.
>
> Syntax: sign-by-update.sh <bootimage> <rsa_key.pem>

> diff --git a/rsa_priv.pem b/rsa_priv.pem

I hope this is some random private key you generated just for the 
purposes of demonstration...

> diff --git a/sign-by-update.sh b/sign-by-update.sh

Let's put these example files in an examples directory or something like 
that.

Should we update the Makefile to install the examples into some doc 
directory?

> new file mode 100755
> index 000000000000..b3f010a41d0e
> --- /dev/null
> +++ b/sign-by-update.sh
> @@ -0,0 +1,59 @@
> +IMAGE_FILE=$1
> +KEY_FILE=$2

There's no #! line here.

I'd suggest adding "set -e" so there is some simple error-checking.

> +echo " Get rid of all temporary files: *.sig, *.tosig, *.tmp *.mod *.rev"

Why a space at the start of the echo'd data? (Or the end in other 
commands) Quotes aren't needed either, at least for this command. 
Similar comments for all the other echo statements.

> +echo " Reverse bl signature to meet tegra soc signature ordering"
> +$OBJCOPY -I binary --reverse-bytes=256 $IMAGE_FILE.bl.sig $IMAGE_FILE.bl.sig.rev

Should cbootimage do this itself; this feels like an issue related to 
packing the data into the BCT which is what cbootimage handles...

> +echo " Create public key modulus from key file $KEY_FILE and save to $KEY_FILE.mod"
> +$OPENSSL rsa -in $KEY_FILE -noout -modulus -out $KEY_FILE.mod
> +# remove prefix and LF

-noout then -out?

> +$DD bs=1 if=$KEY_FILE.mod of=$KEY_FILE.mod.tmp skip=8 count=512

I'd suggest using cut for that in case the prefix changes; `cut -d= f2`.

> diff --git a/sign.sh b/sign.sh

Likely all the comments for sign-by-update.sh apply here too.

I expect these scripts are very similar. Can the script take a cmdline 
argument to request the update type (dd vs. a all to cbootimage -u) so 
that all the common logic isn't duplicated?

> +echo " Copy the signed binary to the target file $TARGET_IMAGE"
> +$MV $IMAGE_FILE.tmp $TARGET_IMAGE
> +

There's a blank line at EOF there.

RE: [cbootimage PATCH v3 5/5] Add two sample scripts to do rsa signing for T210 bootimage

[Jimmy Zhang]

> -----Original Message-----
> From: linux-tegra-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org [mailto:linux-tegra-
> owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org] On Behalf Of Stephen Warren
> Sent: Thursday, October 08, 2015 1:58 PM
> To: Jimmy Zhang
> Cc: Allen Martin; Stephen Warren; linux-tegra-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
> Subject: Re: [cbootimage PATCH v3 5/5] Add two sample scripts to do rsa
> signing for T210 bootimage
> 
> On 10/08/2015 01:38 PM, Jimmy Zhang wrote:
> > sign.sh runs openssl and other linux utilities to generate rsa-pss
> > signatures for a prebuilt bootimage and inject signatures and rsa
> > modulus into bct directly.
> >
> > Syntax: sign.sh <bootimage> <rsa_key.pem>
> >
> > sign-by-update.sh is similar to sign.sh. The difference is the
> > signatures update are done by cbootimage with configuration keywords
> > "RsaKeyModulusFile", "RsaPssSigBlFile", and "RsaPssSigBctFile".
> > Comparing to sign.sh, this script is relatively simple to be ported to
> > T124/T114.
> >
> > Syntax: sign-by-update.sh <bootimage> <rsa_key.pem>
> 
> > diff --git a/rsa_priv.pem b/rsa_priv.pem
> 
> I hope this is some random private key you generated just for the purposes
> of demonstration...
> 

This key is generated by openssl. It is used on my fused board. I will replace it with another random generated 2048 bit long modulus private key file.

> > diff --git a/sign-by-update.sh b/sign-by-update.sh
> 
> Let's put these example files in an examples directory or something like that.
> 
> Should we update the Makefile to install the examples into some doc
> directory?
> 

I am not sure how to change Makefile.

> > new file mode 100755
> > index 000000000000..b3f010a41d0e
> > --- /dev/null
> > +++ b/sign-by-update.sh
> > @@ -0,0 +1,59 @@
> > +IMAGE_FILE=$1
> > +KEY_FILE=$2
> 
> There's no #! line here.
> 

Will do.

> I'd suggest adding "set -e" so there is some simple error-checking.
> 
> > +echo " Get rid of all temporary files: *.sig, *.tosig, *.tmp *.mod *.rev"
> 
> Why a space at the start of the echo'd data? (Or the end in other
> commands) Quotes aren't needed either, at least for this command.
> Similar comments for all the other echo statements.
> 

OK. Will clean it up.

> > +echo " Reverse bl signature to meet tegra soc signature ordering"
> > +$OBJCOPY -I binary --reverse-bytes=256 $IMAGE_FILE.bl.sig
> > +$IMAGE_FILE.bl.sig.rev
> 
> Should cbootimage do this itself; this feels like an issue related to packing the
> data into the BCT which is what cbootimage handles...
> 


OK. I will add a function to handle this issue.

> > +echo " Create public key modulus from key file $KEY_FILE and save to
> $KEY_FILE.mod"
> > +$OPENSSL rsa -in $KEY_FILE -noout -modulus -out $KEY_FILE.mod #
> > +remove prefix and LF
> 
> -noout then -out?
> 

No. They are different options. Without -noout, private key is printed to output file as well.

> > +$DD bs=1 if=$KEY_FILE.mod of=$KEY_FILE.mod.tmp skip=8 count=512
> 
> I'd suggest using cut for that in case the prefix changes; `cut -d= f2`.
> 

Not sure how to use 'cut'. Instead, will use 'sed'

> > diff --git a/sign.sh b/sign.sh
> 
> Likely all the comments for sign-by-update.sh apply here too.
> 
> I expect these scripts are very similar. Can the script take a cmdline argument
> to request the update type (dd vs. a all to cbootimage -u) so that all the
> common logic isn't duplicated?
> 
> > +echo " Copy the signed binary to the target file $TARGET_IMAGE"
> > +$MV $IMAGE_FILE.tmp $TARGET_IMAGE
> > +
> 
> There's a blank line at EOF there.
> 

Will remove it.

> --
> To unsubscribe from this list: send the line "unsubscribe linux-tegra" in the
> body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at
> http://vger.kernel.org/majordomo-info.html

Re: [cbootimage PATCH v3 5/5] Add two sample scripts to do rsa signing for T210 bootimage

[Stephen Warren]

On 10/08/2015 08:00 PM, Jimmy Zhang wrote:
> Stephen Warren wrote at Thursday, October 08, 2015 1:58 PM:
>> On 10/08/2015 01:38 PM, Jimmy Zhang wrote:
>>> sign.sh runs openssl and other linux utilities to generate rsa-pss
>>> signatures for a prebuilt bootimage and inject signatures and rsa
>>> modulus into bct directly.
>>>
>>> Syntax: sign.sh <bootimage> <rsa_key.pem>
>>>
>>> sign-by-update.sh is similar to sign.sh. The difference is the
>>> signatures update are done by cbootimage with configuration keywords
>>> "RsaKeyModulusFile", "RsaPssSigBlFile", and "RsaPssSigBctFile".
>>> Comparing to sign.sh, this script is relatively simple to be ported to
>>> T124/T114.
>>>
>>> Syntax: sign-by-update.sh <bootimage> <rsa_key.pem>

>>> diff --git a/sign-by-update.sh b/sign-by-update.sh
>>
>> Let's put these example files in an examples directory or something like that.
>>
>> Should we update the Makefile to install the examples into some doc
>> directory?
> 
> I am not sure how to change Makefile.

I'm sure Allen can give you an example quickly, although just having the
files in the source distribution (in a sub-dir) is probably fine for now.

>>> +$DD bs=1 if=$KEY_FILE.mod of=$KEY_FILE.mod.tmp skip=8 count=512
>>
>> I'd suggest using cut for that in case the prefix changes; `cut -d= f2`.
> 
> Not sure how to use 'cut'. Instead, will use 'sed'

You can can just use the cut command I gave, this maps to this as the
entire replacement for dd:

cut -d= -f2 < $KEY_FILE.mod > $KEY_FILE.mod.tmp

RE: [cbootimage PATCH v3 5/5] Add two sample scripts to do rsa signing for T210 bootimage

[Jimmy Zhang]

I am considering to remove sample sign.sh because 
1. It is kind of hacking.
2. Reversing byte order operation can be removed from sample two but not sign.sh

If you agree, I will remove sign.sh and then rename sign-by-update.sh to sign.sh

 
> -----Original Message-----
> From: Stephen Warren [mailto:swarren-3lzwWm7+Weoh9ZMKESR00Q@public.gmane.org]
> Sent: Thursday, October 08, 2015 7:09 PM
> To: Jimmy Zhang
> Cc: Allen Martin; Stephen Warren; linux-tegra-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
> Subject: Re: [cbootimage PATCH v3 5/5] Add two sample scripts to do rsa
> signing for T210 bootimage
> 
> On 10/08/2015 08:00 PM, Jimmy Zhang wrote:
> > Stephen Warren wrote at Thursday, October 08, 2015 1:58 PM:
> >> On 10/08/2015 01:38 PM, Jimmy Zhang wrote:
> >>> sign.sh runs openssl and other linux utilities to generate rsa-pss
> >>> signatures for a prebuilt bootimage and inject signatures and rsa
> >>> modulus into bct directly.
> >>>
> >>> Syntax: sign.sh <bootimage> <rsa_key.pem>
> >>>
> >>> sign-by-update.sh is similar to sign.sh. The difference is the
> >>> signatures update are done by cbootimage with configuration keywords
> >>> "RsaKeyModulusFile", "RsaPssSigBlFile", and "RsaPssSigBctFile".
> >>> Comparing to sign.sh, this script is relatively simple to be ported
> >>> to T124/T114.
> >>>
> >>> Syntax: sign-by-update.sh <bootimage> <rsa_key.pem>
> 
> >>> diff --git a/sign-by-update.sh b/sign-by-update.sh
> >>
> >> Let's put these example files in an examples directory or something like
> that.
> >>
> >> Should we update the Makefile to install the examples into some doc
> >> directory?
> >
> > I am not sure how to change Makefile.
> 
> I'm sure Allen can give you an example quickly, although just having the files
> in the source distribution (in a sub-dir) is probably fine for now.
> 

OK.

> >>> +$DD bs=1 if=$KEY_FILE.mod of=$KEY_FILE.mod.tmp skip=8 count=512
> >>
> >> I'd suggest using cut for that in case the prefix changes; `cut -d= f2`.
> >
> > Not sure how to use 'cut'. Instead, will use 'sed'
> 
> You can can just use the cut command I gave, this maps to this as the entire
> replacement for dd:
> 
> cut -d= -f2 < $KEY_FILE.mod > $KEY_FILE.mod.tmp

OK.

Re: [cbootimage PATCH v3 5/5] Add two sample scripts to do rsa signing for T210 bootimage

[Stephen Warren]

On 10/09/2015 11:11 AM, Jimmy Zhang wrote:
> I am considering to remove sample sign.sh because
> 1. It is kind of hacking.
> 2. Reversing byte order operation can be removed from sample two but not sign.sh
>
> If you agree, I will remove sign.sh and then rename sign-by-update.sh to sign.sh

I must admit I wondered why you went to the trouble of enhancing 
cbootimage to be able to update the signatures and then provided a 
sample script that didn't use cbootimage:-)

Having a single sample script that only uses cbootimage sounds fine to me.

Re: [cbootimage PATCH v3 5/5] Add two sample scripts to do rsa signing for T210 bootimage

[Allen Martin]

On Thu, Oct 08, 2015 at 08:09:16PM -0600, Stephen Warren wrote:
> On 10/08/2015 08:00 PM, Jimmy Zhang wrote:
> > Stephen Warren wrote at Thursday, October 08, 2015 1:58 PM:
> >> On 10/08/2015 01:38 PM, Jimmy Zhang wrote:
> >>
> >> Should we update the Makefile to install the examples into some doc
> >> directory?
> > 
> > I am not sure how to change Makefile.
> 
> I'm sure Allen can give you an example quickly, although just having the
> files in the source distribution (in a sub-dir) is probably fine for now.

You can add a "doc_DATA = example1.txt" line to Makefile.am and that
will cause the example1.txt to get installed into:
${prefix}/share/doc/cbootimage

-Allen

Re: [cbootimage PATCH v3 0/5] Add RSA signing support

[Stephen Warren]

On 10/08/2015 01:38 PM, Jimmy Zhang wrote:
> 1. Address issues found in v2.
> 2. Use keyword "RehashBl" instead of "ReSignBl" to re-generate AES hash
>     for bootloader (and bct).
> 3. Add sample scripts to do rsa signing for T210 bootimage.

It's nice to have the changelog (also) in the individual patches so that 
it's easier for reviewers to track down where to look for changes.