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

Message ID 1444264845-16741-6-git-send-email-jimmzhang@nvidia.com
State Superseded, archived
Headers show

Commit Message

jimmzhang Oct. 8, 2015, 12:40 a.m. UTC 
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@nvidia.com>
---
 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 mbox

Patch

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
+