sign.sh runs openssl and other linux utilities to generate rsa-pss signatures for a prebuilt bootimage and then uses cbootimage option --update to update bootimage's rsa signatures and rsa modulus. Syntax: sign.sh <bootimage> <rsa_key.pem> Signed-off-by: Jimmy Zhang <jimmzhang@xxxxxxxxxx> --- samples/rsa_priv.pem | 27 +++++++++++++++++++ samples/sign.sh | 73 ++++++++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 100 insertions(+) create mode 100644 samples/rsa_priv.pem create mode 100755 samples/sign.sh diff --git a/samples/rsa_priv.pem b/samples/rsa_priv.pem new file mode 100644 index 000000000000..a02d77fc438c --- /dev/null +++ b/samples/rsa_priv.pem @@ -0,0 +1,27 @@ +-----BEGIN RSA PRIVATE KEY----- +MIIEpQIBAAKCAQEA2L0jolLgp2pKAzn/JeZuxgGPY1Yz4ZNkttzvBlVhozEynj2x +Lttz1gZ6fYUb/ObM8v2PoeOlrwkGoWMscuMS4MnLG2NcJlWmlsLTyfw3EwxblM3D +DniscakhMexNK3J7uxmmRkQTfldec4JHjsAN6d9cZQ0POdsA7j5lKNG0KgCohKk6 +p+lMYXFqgxx3IQWcynhuKVtVFm/UJJBC+a4ibbXcpnio96ySVrPO/ZpEOhEpPTWX +VLeiqBB3dsu//9X0vDfShyBlctaonx2Z7xWQWotubze0iIvyU6U+T69aDOXfHQfu +kNMX3Dj4VCndW/FUrrg5k/y9dMA1We3Ng1A0NQIDAQABAoIBABcWRqZy15VdwBaJ +5gDeg+w5nFGDjDE6Jx9Hd3qgO69LfU3X2njYTYV92SxnsmyFFU3I7rTa7/ouJvOo +AcMXJxqkxCrdsaIvu3gRtsesQx2XUmYOaPmwpwXQc0XDGxFGt6FdgRW5CK6LlfcN +6JtvH8xKy6fD9Vw/VOEL6nCnrd5PU3UNU/Ng7h/SZ+5NEALJE7+gaMvmK9o9lX3a +/tze6bwKKF+a2luTs2aVGxjUYBud6YOE2KPG7zltuHUHUeEgJ/X/sgWYiHsqpK3l +rIrjCVIQnrRCCtCHg5BbqtwStl5Gz+Y431DXU9Sv6fVqIFgveweePhhDux/YV+KY +rvq5RiECgYEA7OHr8BYWkeZKuU/IkGdsdiPEEB7mNOJHwE4OXdwLIIygQGtQCuJG +EHMQv9kE/1ibVRIxqnliFb/CupZ5wwyvjFgUq5XZl7s6XpNOBhJHV0U5AJSvS0rb +YNU2PBfRmMMI/gRdF/onUpopY7ZWLv7u+VF7ZgtM5hQr2jwcjwBzbRkCgYEA6jsK +tB6SGIO2c5E+CLAY5J4eJca6ORaVcKw1OfDL346UJYkvqOLBc8KwFs87gDbwhmjn +GJUWlhk5iUoWZrFJpTj8+hVNxKumtZ5x8MQkNXL7WBNYcVxobuGVW8c6jZU3C/al +Im9DRTPXhgvMy7mu4slVaAhhrmUJRdl6fwmCR30CgYEA5FoxwML6RPGUrSl9Nb+N +riFyWvv+fZJ5Cqf0b4S08U6/GPqaMbPJSQgzaE3D5Ie9Tff5CtZyuHagOJDglie/ +fvJWEsak+QETFqK3/2BVh4qClc2/YjyqWKGQ48MuWS4CmCUKvRd4GsfkCGx4jltR +ceSbqVZRbiaZ04pJGY2ct9kCgYEArWaaLO/4zgcsGfArUXk0ZIMd5G9zS3IJnckO ++l7mPxEpYYRm8Qs1lcJKZAh0jx2dAJRGiO9OMj5oVtevL8UNtTA0L9t3oCJHH2s2 +BLzf5WXC5tgjgICdm4CK9s/N7CTMBKJKa+yci22un0C7ExLagm/0NzkFP3ry22/9 +/HAIr20CgYEAnUGwciM7Z9aMpPkX3iaRG/zm1FWbsuJldNa5IZQ6CamDIZhb+u2u +1yuCUJZ7zY51RO4n2Hi/1OU1XS7XlevoT22i7xJmIjPVoWzumUwMjmhYVqxK/X50 +Hcd+qL1Xs6KmsWrlg2sgFliX79RawE3jl/yZrFMuHvWiItXO92YFuOI= +-----END RSA PRIVATE KEY----- diff --git a/samples/sign.sh b/samples/sign.sh new file mode 100755 index 000000000000..2edd12695f4b --- /dev/null +++ b/samples/sign.sh @@ -0,0 +1,73 @@ +#!/bin/bash +# +# Copyright (c) 2015, NVIDIA CORPORATION. All rights reserved. +# +# This program is free software; you can redistribute it and/or modify it +# under the terms and conditions of the GNU General Public License, +# version 2, as published by the Free Software Foundation. +# +# This program is distributed in the hope it will be useful, but WITHOUT +# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or +# FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for +# more details. +# +# You should have received a copy of the GNU General Public License +# along with this program. If not, see <http://www.gnu.org/licenses/>. +# +# See file CREDITS for list of people who contributed to this +# project. +# +set -e +IMAGE_FILE=$1 +KEY_FILE=$2 +TARGET_IMAGE=$IMAGE_FILE +CONFIG_FILE=config.tmp + +CBOOTIMAGE=../src/cbootimage +BCT_DUMP=../src/bct_dump +OBJCOPY=objcopy +OPENSSL=openssl +DD=dd +RM=rm +MV=mv +XXD=xxd +CUT=cut + +echo "Get rid of all temporary files: *.sig, *.tosig, *.tmp *.mod" +$RM -f *.sig *.tosig *.tmp *.mod + +echo "Get bl length " +BL_LENGTH=`$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 bootloader 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 "Update bootloader's rsa signature, aes hash and bct's aes hash" +echo "RsaPssSigBlFile = $IMAGE_FILE.bl.sig;" > $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 "Create public key modulus from key file $KEY_FILE and save to $KEY_FILE.mod" +$OPENSSL rsa -in $KEY_FILE -noout -modulus -out $KEY_FILE.mod +# remove prefix +$CUT -d= -f2 < $KEY_FILE.mod > $KEY_FILE.mod.tmp + +# convert from hexdecimal to binary +$XXD -r -p -l 256 $KEY_FILE.mod.tmp $KEY_FILE.mod.bin + +echo "Update bct's rsa signature and modulus" +echo "RsaPssSigBctFile = $IMAGE_FILE.bct.sig;" > $CONFIG_FILE +echo "RsaKeyModulusFile = $KEY_FILE.mod.bin;" >> $CONFIG_FILE +$CBOOTIMAGE -s tegra210 -u $CONFIG_FILE $IMAGE_FILE.tmp $TARGET_IMAGE -- 1.8.1.5 -- To unsubscribe from this list: send the line "unsubscribe linux-tegra" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
