samples: bluetooth: fast_pair: locator_tag: use non-default DFU key

kapi-no · kapi-no · commit f307e5f3d450 · 2025-03-27T16:29:31.000+01:00
Updated the build target configurations based on the nRF52 and the
nRF53 Series to use the non-default private key for the generation of
the DFU package signature in the Fast Pair Locator Tag sample.

Ref: NCSDK-30842

Signed-off-by: Kamil Piszczek &lt;Kamil.Piszczek@nordicsemi.no&gt;
diff --git a/doc/nrf/releases_and_maturity/releases/release-notes-changelog.rst b/doc/nrf/releases_and_maturity/releases/release-notes-changelog.rst
@@ -494,6 +494,10 @@ Bluetooth Fast Pair samples
       The change modifies the memory partition layout for the ``nrf54l15dk/nrf54l15/cpuapp`` board target and changes the MCUboot image signing algorithm.
       Because of that, the application images built for the ``nrf54l15dk/nrf54l15/cpuapp`` board target from this |NCS| release are not compatible with the MCUboot bootloader built from previous releases.
       It is highly recommended to use hardware cryptography for the nRF54L SoC Series for improved security.
+    * The configurations for board targets with the MCUboot bootloader support to use a non-default signature key file (the ``SB_CONFIG_BOOT_SIGNATURE_KEY_FILE`` Kconfig option).
+      The application uses a unique signature key file for each board target, which is defined at the same directory level as the target sysbuild configuration file.
+      This modification changes the key set that is used by the MCUboot DFU solution.
+      Because of that, the application images from this |NCS| release are not compatible with the MCUboot bootloader built from previous releases.
 
 Bluetooth Mesh samples
 ----------------------
diff --git a/samples/bluetooth/fast_pair/locator_tag/sysbuild/configuration/nrf52833dk_nrf52833/boot_signature_key_file_rsa2048.pem b/samples/bluetooth/fast_pair/locator_tag/sysbuild/configuration/nrf52833dk_nrf52833/boot_signature_key_file_rsa2048.pem
@@ -0,0 +1,28 @@
+-----BEGIN PRIVATE KEY-----
+MIIEvAIBADANBgkqhkiG9w0BAQEFAASCBKYwggSiAgEAAoIBAQCi3aEF7pO4OD3T
+Y71niDIw7c2E5w8p3ttQRhhLdyJGNHvw1RAyF7j+O+G5ZKzCX4iluchH7Jtraki5
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+OHtpiFiLFlkg5YaFuXntJg==
+-----END PRIVATE KEY-----
diff --git a/samples/bluetooth/fast_pair/locator_tag/sysbuild/configuration/nrf52833dk_nrf52833/sysbuild_release.conf b/samples/bluetooth/fast_pair/locator_tag/sysbuild/configuration/nrf52833dk_nrf52833/sysbuild_release.conf
@@ -1,9 +1,10 @@
 #
-# Copyright (c) 2024 Nordic Semiconductor
+# Copyright (c) 2024-2025 Nordic Semiconductor
 #
 # SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
 #
 
 SB_CONFIG_BOOTLOADER_MCUBOOT=y
 SB_CONFIG_MCUBOOT_MODE_DIRECT_XIP=y
 SB_CONFIG_BOOT_SIGNATURE_TYPE_RSA=y
+SB_CONFIG_BOOT_SIGNATURE_KEY_FILE="\${SB_APPLICATION_CONFIG_DIR}/boot_signature_key_file_rsa2048.pem"
diff --git a/samples/bluetooth/fast_pair/locator_tag/sysbuild/configuration/nrf52840dk_nrf52840/boot_signature_key_file_rsa2048.pem b/samples/bluetooth/fast_pair/locator_tag/sysbuild/configuration/nrf52840dk_nrf52840/boot_signature_key_file_rsa2048.pem
@@ -0,0 +1,28 @@
+-----BEGIN PRIVATE KEY-----
+MIIEvQIBADANBgkqhkiG9w0BAQEFAASCBKcwggSjAgEAAoIBAQDm/ZyhXMnq9ylH
+MXAUDoObbIDHfxBWuo9vs/smubzTmU0VhYmJDyTQQoFw0Pr9rr+Qf5laMy+ClBxP
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+xDfTfyhv3o9wSsxQbTbkE0U=
+-----END PRIVATE KEY-----
diff --git a/samples/bluetooth/fast_pair/locator_tag/sysbuild/configuration/nrf52840dk_nrf52840/sysbuild.conf b/samples/bluetooth/fast_pair/locator_tag/sysbuild/configuration/nrf52840dk_nrf52840/sysbuild.conf
@@ -1,9 +1,10 @@
 #
-# Copyright (c) 2024 Nordic Semiconductor
+# Copyright (c) 2024-2025 Nordic Semiconductor
 #
 # SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
 #
 
 SB_CONFIG_BOOTLOADER_MCUBOOT=y
 SB_CONFIG_MCUBOOT_MODE_DIRECT_XIP=y
 SB_CONFIG_BOOT_SIGNATURE_TYPE_RSA=y
+SB_CONFIG_BOOT_SIGNATURE_KEY_FILE="\${SB_APPLICATION_CONFIG_DIR}/boot_signature_key_file_rsa2048.pem"
diff --git a/samples/bluetooth/fast_pair/locator_tag/sysbuild/configuration/nrf52dk_nrf52832/boot_signature_key_file_rsa2048.pem b/samples/bluetooth/fast_pair/locator_tag/sysbuild/configuration/nrf52dk_nrf52832/boot_signature_key_file_rsa2048.pem
@@ -0,0 +1,28 @@
+-----BEGIN PRIVATE KEY-----
+MIIEvAIBADANBgkqhkiG9w0BAQEFAASCBKYwggSiAgEAAoIBAQCSu22oM2T5vxSy
+KM6CgC1I92E5MzZ9LnGc0j6LuQK+e4K6VHm7cKjKkcupFxgtcj0pyhTjzn8KmeFO
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+etwkKv3bu6Tla/pGEpiAIg==
+-----END PRIVATE KEY-----
diff --git a/samples/bluetooth/fast_pair/locator_tag/sysbuild/configuration/nrf52dk_nrf52832/sysbuild_release.conf b/samples/bluetooth/fast_pair/locator_tag/sysbuild/configuration/nrf52dk_nrf52832/sysbuild_release.conf
@@ -1,9 +1,10 @@
 #
-# Copyright (c) 2024 Nordic Semiconductor
+# Copyright (c) 2024-2025 Nordic Semiconductor
 #
 # SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
 #
 
 SB_CONFIG_BOOTLOADER_MCUBOOT=y
 SB_CONFIG_MCUBOOT_MODE_DIRECT_XIP=y
 SB_CONFIG_BOOT_SIGNATURE_TYPE_RSA=y
+SB_CONFIG_BOOT_SIGNATURE_KEY_FILE="\${SB_APPLICATION_CONFIG_DIR}/boot_signature_key_file_rsa2048.pem"
diff --git a/samples/bluetooth/fast_pair/locator_tag/sysbuild/configuration/nrf5340dk_nrf5340_cpuapp/boot_signature_key_file_rsa2048.pem b/samples/bluetooth/fast_pair/locator_tag/sysbuild/configuration/nrf5340dk_nrf5340_cpuapp/boot_signature_key_file_rsa2048.pem
@@ -0,0 +1,28 @@
+-----BEGIN PRIVATE KEY-----
+MIIEvQIBADANBgkqhkiG9w0BAQEFAASCBKcwggSjAgEAAoIBAQDtc7fA2Q9dJIoA
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+lzGcj/Z8NvPb25xtKZzfZHQ=
+-----END PRIVATE KEY-----
diff --git a/samples/bluetooth/fast_pair/locator_tag/sysbuild/configuration/nrf5340dk_nrf5340_cpuapp/sysbuild.conf b/samples/bluetooth/fast_pair/locator_tag/sysbuild/configuration/nrf5340dk_nrf5340_cpuapp/sysbuild.conf
@@ -1,5 +1,5 @@
 #
-# Copyright (c) 2024 Nordic Semiconductor
+# Copyright (c) 2024-2025 Nordic Semiconductor
 #
 # SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
 #
@@ -10,6 +10,7 @@ SB_CONFIG_BOOTLOADER_MCUBOOT=y
 SB_CONFIG_MCUBOOT_MODE_OVERWRITE_ONLY=y
 SB_CONFIG_PM_EXTERNAL_FLASH_MCUBOOT_SECONDARY=y
 SB_CONFIG_BOOT_SIGNATURE_TYPE_RSA=y
+SB_CONFIG_BOOT_SIGNATURE_KEY_FILE="\${SB_APPLICATION_CONFIG_DIR}/boot_signature_key_file_rsa2048.pem"
 
 SB_CONFIG_SECURE_BOOT_NETCORE=y
 SB_CONFIG_NETCORE_APP_UPDATE=y
diff --git a/samples/bluetooth/fast_pair/locator_tag/sysbuild/configuration/nrf5340dk_nrf5340_cpuapp_ns/boot_signature_key_file_rsa2048.pem b/samples/bluetooth/fast_pair/locator_tag/sysbuild/configuration/nrf5340dk_nrf5340_cpuapp_ns/boot_signature_key_file_rsa2048.pem
@@ -0,0 +1,28 @@
+-----BEGIN PRIVATE KEY-----
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+HOKAozHlQD/ow1PSPGmZTr57pDJmPze2TVorxoxFeB3HEudfQc7vkLdTmO3vPZFf
+McR4VZClDKn17znnx2bRKSOirQKBgQC1ZltyVswThNO2/aQ5I9xXB+xB0b2zDsnw
+R8Ci+NnMDBYxJbLwP2rMhUVutCjFQyVNmfIXRP9aHgloXM5UWXLaKW9OmiBAE0/r
+8Xmsuec1OVhdNZYYRhY0Qs+Hb0BwZyPpPZ1ZusXIvnO1v1Rm6DiRR0ADq1Mi11xl
+xPuSUsLHEQKBgDWHx1wyBXuQ996GiddwbPjWkdedUiiYCwFLyAZMnY62utIul0PN
+BRcwiV0dGhEidCRU2DNj0bghmxTE+c4CoY+4Ny4z6fDaVKXUps8FHHu2M/7RfnRc
+k4+ilwYbjoFURNR8prIEs+is4UaH0XMjunw9F6vulbjvDy1pg98flfuRAoGAVRGR
+ZQeLYMPzvWcpcpp8pFvU0fEYczZGQWaE0mi9StGIPrgdOEmlPhBpxUa7r/aTMdc2
+Du+OiKZ5ZvXO1QO1ttWjm0rwQNxNqKpvky8DXJRt+hg9MVj85LlINY1YvN3Bm4oH
+lqLeSgv2m48Ed9YDYS32uUHJFRfF/vvntnEVYuECgYAN+fFLVXrI0R5qK2yEmg3R
+R3DaEq2HQiSoAqVJATojQmzGUCeWj8BxHE22fv9Pn1hytCu2FV8zHUbv5idtMVAi
+RDNbfSIiR5N93t6YTmOpQ9106/NuVRxuRJYJn7m3eUAvWzXnAX0Dm+a+42HbOmSM
+r0vDSLzpS+VvRDhDezmsWA==
+-----END PRIVATE KEY-----
diff --git a/samples/bluetooth/fast_pair/locator_tag/sysbuild/configuration/nrf5340dk_nrf5340_cpuapp_ns/sysbuild.conf b/samples/bluetooth/fast_pair/locator_tag/sysbuild/configuration/nrf5340dk_nrf5340_cpuapp_ns/sysbuild.conf
@@ -1,5 +1,5 @@
 #
-# Copyright (c) 2024 Nordic Semiconductor
+# Copyright (c) 2024-2025 Nordic Semiconductor
 #
 # SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
 #
@@ -11,7 +11,7 @@ SB_CONFIG_MCUBOOT_MODE_OVERWRITE_ONLY=y
 SB_CONFIG_PM_EXTERNAL_FLASH_MCUBOOT_SECONDARY=y
 SB_CONFIG_MCUBOOT_USE_ALL_AVAILABLE_RAM=y
 SB_CONFIG_BOOT_SIGNATURE_TYPE_RSA=y
-
+SB_CONFIG_BOOT_SIGNATURE_KEY_FILE="\${SB_APPLICATION_CONFIG_DIR}/boot_signature_key_file_rsa2048.pem"
 SB_CONFIG_SECURE_BOOT_NETCORE=y
 SB_CONFIG_NETCORE_APP_UPDATE=y
 
diff --git a/samples/bluetooth/fast_pair/locator_tag/sysbuild/configuration/thingy53_nrf5340_cpuapp/boot_signature_key_file_rsa2048.pem b/samples/bluetooth/fast_pair/locator_tag/sysbuild/configuration/thingy53_nrf5340_cpuapp/boot_signature_key_file_rsa2048.pem
@@ -0,0 +1,28 @@
+-----BEGIN PRIVATE KEY-----
+MIIEvgIBADANBgkqhkiG9w0BAQEFAASCBKgwggSkAgEAAoIBAQDvqYay2SGHZMlI
+9J+W9nGu1+uKKXla5J18L9F0Zb08QmSbGEabAWaoJo3pOJnZw5s8mZ58PDuKFDrJ
+FzvaEH3dtu8nPrzGHiPRTvLoo5EDUf2/lmLlw9GYL6uC3mQH51sKxK15Jd63PKR7
+sXwjiOYXArYRLXRykJ4qTbbBrkbFKmEXBNc011ItefBRqX6bPKkDeDuuy7+5v1T8
+91LbCyyn5uEHYSNE5WoGxROSmAhou2S5JIbQtZ7VS6hzYsgPn0AMuJ98tl8qQJzx
+VrfaeXwAJAExXiJy2jtKOOPKmRIeRXYOp8DPWU8xQfUCP2cU/UK80Jc3SyekSShd
+f/ygU8PRAgMBAAECggEAAeXA1SLqtOqXfOJB7rUsDH81ZFJEfZOcixaKVR52l3br
+mr5AFdtWm5t1iWyLLEoUDTBmrLNh4cub9Qpf7Q+vHW2kulXw8u0bab1zJyQfYmw4
+YvdO+GR64PZ0qEw4NMdQRVcuC+zgtOjwIPIUamgbsUAyXpOybbNHK0zS9vjZIte5
+gakvckOSxiTC4/Zqi635yeaWvwltELHs0Tqf7gFOiD+NPhM/dMM6KCyQYoQ4rnUw
+aB4gC9sqMTsjYvz6pvGExotMnzwP3eAll8GVdZ81E5RCxv8CkeQ5do+DwHulRtoQ
+l+/xcsdbRxgcublr/Ow7cJZ7/LqMiavvuX5jsTB1wQKBgQD6dpddl13uDZ7PLuF5
+kUDCU0cgQ2etBTUJEoH72UEv1kENwZ9NilZCdj8r0chTreORF+VujDinG5rr/kYO
+TFrTTm9O1qNgJ5LN19KKV4L7LfzIcJlI3jotLEydPea48D9oReAMJEHiw3lEnzK2
+hg9wqwb8wWLgJEAz3hHkQpjv4QKBgQD09c9rNXxVJ4wsMCLbu7Y6QL/d3uEIGYB8
+ETeHK5v2QSu4MpT75gJV7ckJcq6s7rYY68rDK2gpDXZ1uBepNhPngETqgNthOREd
+x3edGQ05U0BFBbMeFb6H9pZV9/6htQo2fJjkOzENG8DCuPKPNXUyTgRHKPwRXeGo
+3GABA+wR8QKBgHzSH0toRUp/BTcxoPLp3cE6qYa9sOx8XNsBmz/9HMyPVWpapV6K
+Y8TJk1/uM4zoazIDG7dFMHKvgjy8QwObL+SBAV3kABXKgxIMzgNd64vsdj8aRnoX
+Lh0XJ7NxhwuBx8fakvbaFu/BBS2avTZTh1xaD6hlZDZaOpjewkHkor1hAoGBAIfi
+sAw14GHQjWaZ0Ux5Zc4MyyKGF+kJVIf+eQInw92oK1uD27ec0WDfhm0STCmsRiGu
+84yu0JotWLBWzfFVCVebhR9dGdVl9cPCOe1Qz1AkiXuAfOtMfqQnux+3cW484ox1
+M88vsrcl1RlvxUaCDiA4vRDIgIQVwy+MCEmn5lXRAoGBAKdrUzTT7L9RrECiTaY7
+9lelwJgxMR1KQfBRMfMwdm60NMYyMw99aVJKRNDWkizo2P1JA/1/Q8VhnbIQuE8K
+TDFfPPl+sNmMTtzlTEStO79qkMjhwoAaC266GlieL6MudmEwgOJjmwQHt9DhwAVS
+61H4u3v12RQKtLcKFf3C3zlq
+-----END PRIVATE KEY-----
diff --git a/samples/bluetooth/fast_pair/locator_tag/sysbuild/configuration/thingy53_nrf5340_cpuapp/sysbuild.conf b/samples/bluetooth/fast_pair/locator_tag/sysbuild/configuration/thingy53_nrf5340_cpuapp/sysbuild.conf
@@ -1,9 +1,10 @@
 #
-# Copyright (c) 2024 Nordic Semiconductor
+# Copyright (c) 2024-2025 Nordic Semiconductor
 #
 # SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
 #
 
 SB_CONFIG_NETCORE_IPC_RADIO=y
 
-# Bootloader configuration is set at the Thingy:53 board level
+# Majority of bootloader configurations are set at the Thingy:53 board level
+SB_CONFIG_BOOT_SIGNATURE_KEY_FILE="\${SB_APPLICATION_CONFIG_DIR}/boot_signature_key_file_rsa2048.pem"
diff --git a/samples/bluetooth/fast_pair/locator_tag/sysbuild/configuration/thingy53_nrf5340_cpuapp_ns/boot_signature_key_file_rsa2048.pem b/samples/bluetooth/fast_pair/locator_tag/sysbuild/configuration/thingy53_nrf5340_cpuapp_ns/boot_signature_key_file_rsa2048.pem
@@ -0,0 +1,28 @@
+-----BEGIN PRIVATE KEY-----
+MIIEvQIBADANBgkqhkiG9w0BAQEFAASCBKcwggSjAgEAAoIBAQCeH+7oBt6n4LZO
+Chwh5xn2e4CErFmnuY9+mk0jEU8N4Jlf8BSDgx2VFcbMRRC9zOs1MQ9ckagBliFF
+lYm8D8AO2JVambFsQlPtAJ8244mtKy4isg2Q40MxT1BAP9989B/Rbws1y++Z3FVT
+QjN4O8ujZwppWInvZmuYsZqDq+4NcVJaiqNMymBcOt99m75qT4Lwm4BQCr++NTo8
+zn8dijJOcp4707mOAwKwqyNuekihA54B6l+l0T4flV7p/eOH1NjAl9MOMiU/27cs
+nTu+ygvF8Y+hyG3dGun8maJZBrs13jZiLDVJFVxHiQdoAT8mjG+XyGbYCwhV9oDi
+7pECwIwbAgMBAAECggEADxlZhMpzJHCut9D7Urlwnzq30PNsNDnh2+L8Dqcud1LF
+EoYoT06L2pqTuxm1OYqBwziGEP7Pnicp0i0vU8flPQWtbVNTv9StkuoGSgV8Ng7z
+ftiltvochm7eaOQwgQwGpccGuQJaRMTnWOXvaEG9dkL2mYycz0FmcNQ0vvIB70KG
+SQ4ooppLAQvnLxWLXYKPbjm/ZGWjELav/KeKLEWF6ZV+IpAnTxtBaOebFmd5z9Dg
+y8x6kc5dFblodXwe9Mjfsxeesg2Mk4STTZKWKBO06SqSQO8GvwKEDsVvU1Wxgil/
+lnLsLOw+zbSSBTcKQk7GFgvqILd/iQKRDVttDmuXUQKBgQDfnvAA1x56b0XlkF7f
+XufzLbM1UQA0e8f0wI1qAscRI83Sqie9uaYTwrv+6doOSDwVAGT/rtTST/IDJVKf
+c+jj4XiALbEo32gu5lFy333eLnCL6lc3c0SYZd1eYLzB8QvxgLnMd89hl4RC9FU7
+a97JTirlPU3yYSTm0sZYJGlw1wKBgQC1BTg5Nsyj7X4W2VOt6Yk7IdjDgRXbQq6x
+6uNJzSHIRRgqjeWBTO+GcdxTUOVFa7t7uWO71OmmJEv45huUjAiScv2K7w6VFQ1k
+rcwAEgdUvuDYDCaHPtUhLu6919kyoJOwzBJ/E9qRJdu1FFBSN3x2ZF5raBw6BB0y
+Uw/853oiXQKBgQCLhoSjUZW/uMv412KKppG85kfJvXeOR6lUagwSGBeS9y8GAYr4
+UuxvqfJYtBqNDL8IL43VBoXdj2omUlRCDzVBcj4YY+oE4ZgEo0owjYfgaENq2VV/
+0Jj9KZm8uEkuDTNxhOroy9yGPN6WVBMWF1ETc4VKMT0APWKj7uE4v8dWUwKBgEI4
+uZu8n1ps3E6xjHo3z/sw46KJy5wdpdjyi9mI0I36MOAIbuhBY/K0HpzgIC+oPLsD
+VCf3uM4Nwzk3vOk33T7uEDDOSXBidjbZmaKA9eubtJd0wneBleiAydfracqqkb0A
+uteARNoKlniFCOk64S5Sg3QZbxIORTwOxO+JItYFAoGAbzIy7epw2DFMW8HpDFra
+Goo2PEW5L1bG8FxNteZu1+tEAMx7QTeslhsZePuqz8URVhkNFElic8W0GUV/yx8w
+OpeMfu1bSsXKhfSVcmwgibe7xVMnc/kGgP1nrTgopj3akn+ZfXBZ+vG6FBalOV+k
+faguXTy0OH2Cq3S+jmPax4g=
+-----END PRIVATE KEY-----
diff --git a/samples/bluetooth/fast_pair/locator_tag/sysbuild/configuration/thingy53_nrf5340_cpuapp_ns/sysbuild.conf b/samples/bluetooth/fast_pair/locator_tag/sysbuild/configuration/thingy53_nrf5340_cpuapp_ns/sysbuild.conf
@@ -1,9 +1,10 @@
 #
-# Copyright (c) 2024 Nordic Semiconductor
+# Copyright (c) 2024-2025 Nordic Semiconductor
 #
 # SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
 #
 
 SB_CONFIG_NETCORE_IPC_RADIO=y
 
-# Bootloader configuration is set at the Thingy:53 board level
+# Majority of bootloader configurations are set at the Thingy:53 board level
+SB_CONFIG_BOOT_SIGNATURE_KEY_FILE="\${SB_APPLICATION_CONFIG_DIR}/boot_signature_key_file_rsa2048.pem"

Original file line number	Diff line number	Diff line change
`@@ -1,9 +1,10 @@`
`1`	`1`	`#`
`2`		`-# Copyright (c) 2024 Nordic Semiconductor`
	`2`	`+# Copyright (c) 2024-2025 Nordic Semiconductor`
`3`	`3`	`#`
`4`	`4`	`# SPDX-License-Identifier: LicenseRef-Nordic-5-Clause`
`5`	`5`	`#`
`6`	`6`
`7`	`7`	`SB_CONFIG_BOOTLOADER_MCUBOOT=y`
`8`	`8`	`SB_CONFIG_MCUBOOT_MODE_DIRECT_XIP=y`
`9`	`9`	`SB_CONFIG_BOOT_SIGNATURE_TYPE_RSA=y`
	`10`	`+SB_CONFIG_BOOT_SIGNATURE_KEY_FILE="\${SB_APPLICATION_CONFIG_DIR}/boot_signature_key_file_rsa2048.pem"`
Original file line number	Diff line number	Diff line change
`@@ -1,5 +1,5 @@`
`1`	`1`	`#`
`2`		`-# Copyright (c) 2024 Nordic Semiconductor`
	`2`	`+# Copyright (c) 2024-2025 Nordic Semiconductor`
`3`	`3`	`#`
`4`	`4`	`# SPDX-License-Identifier: LicenseRef-Nordic-5-Clause`
`5`	`5`	`#`
`@@ -10,6 +10,7 @@ SB_CONFIG_BOOTLOADER_MCUBOOT=y`
`10`	`10`	`SB_CONFIG_MCUBOOT_MODE_OVERWRITE_ONLY=y`
`11`	`11`	`SB_CONFIG_PM_EXTERNAL_FLASH_MCUBOOT_SECONDARY=y`
`12`	`12`	`SB_CONFIG_BOOT_SIGNATURE_TYPE_RSA=y`
	`13`	`+SB_CONFIG_BOOT_SIGNATURE_KEY_FILE="\${SB_APPLICATION_CONFIG_DIR}/boot_signature_key_file_rsa2048.pem"`
`13`	`14`
`14`	`15`	`SB_CONFIG_SECURE_BOOT_NETCORE=y`
`15`	`16`	`SB_CONFIG_NETCORE_APP_UPDATE=y`