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1 #!/bin/bash
2 #
3 # Copyright (c) 2013, Google Inc.
4 #
5 # Simple Verified Boot Test Script
6 #
7 # SPDX-License-Identifier:      GPL-2.0+
8
9 set -e
10
11 # Run U-Boot and report the result
12 # Args:
13 #       $1:     Test message
14 run_uboot() {
15         echo -n "Test Verified Boot Run: $1: "
16         ${uboot} -d sandbox-u-boot.dtb >${tmp} -c '
17 sb load hostfs - 100 test.fit;
18 fdt addr 100;
19 bootm 100;
20 reset'
21         if ! grep -q "$2" ${tmp}; then
22                 echo
23                 echo "Verified boot key check failed, output follows:"
24                 cat ${tmp}
25                 false
26         else
27                 echo "OK"
28         fi
29 }
30
31 echo "Simple Verified Boot Test"
32 echo "========================="
33 echo
34 echo "Please see doc/uImage.FIT/verified-boot.txt for more information"
35 echo
36
37 err=0
38 tmp=/tmp/vboot_test.$$
39
40 dir=$(dirname $0)
41
42 if [ -z ${O} ]; then
43         O=.
44 fi
45 O=$(readlink -f ${O})
46
47 dtc="-I dts -O dtb -p 2000"
48 uboot="${O}/u-boot"
49 mkimage="${O}/tools/mkimage"
50 fit_check_sign="${O}/tools/fit_check_sign"
51 keys="${dir}/dev-keys"
52 echo ${mkimage} -D "${dtc}"
53
54 echo "Build keys"
55 mkdir -p ${keys}
56
57 PUBLIC_EXPONENT=${1}
58
59 if [ -z "${PUBLIC_EXPONENT}" ]; then
60         PUBLIC_EXPONENT=65537
61 fi
62
63 # Create an RSA key pair
64 openssl genpkey -algorithm RSA -out ${keys}/dev.key \
65     -pkeyopt rsa_keygen_bits:2048 \
66     -pkeyopt rsa_keygen_pubexp:${PUBLIC_EXPONENT} 2>/dev/null
67
68 # Create a certificate containing the public key
69 openssl req -batch -new -x509 -key ${keys}/dev.key -out ${keys}/dev.crt
70
71 pushd ${dir} >/dev/null
72
73 function do_test {
74         echo do $sha test
75         # Compile our device tree files for kernel and U-Boot
76         dtc -p 0x1000 sandbox-kernel.dts -O dtb -o sandbox-kernel.dtb
77         dtc -p 0x1000 sandbox-u-boot.dts -O dtb -o sandbox-u-boot.dtb
78
79         # Create a number kernel image with zeroes
80         head -c 5000 /dev/zero >test-kernel.bin
81
82         # Build the FIT, but don't sign anything yet
83         echo Build FIT with signed images
84         ${mkimage} -D "${dtc}" -f sign-images-$sha.its test.fit >${tmp}
85
86         run_uboot "unsigned signatures:" "dev-"
87
88         # Sign images with our dev keys
89         echo Sign images
90         ${mkimage} -D "${dtc}" -F -k dev-keys -K sandbox-u-boot.dtb \
91                 -r test.fit >${tmp}
92
93         run_uboot "signed images" "dev+"
94
95
96         # Create a fresh .dtb without the public keys
97         dtc -p 0x1000 sandbox-u-boot.dts -O dtb -o sandbox-u-boot.dtb
98
99         echo Build FIT with signed configuration
100         ${mkimage} -D "${dtc}" -f sign-configs-$sha.its test.fit >${tmp}
101
102         run_uboot "unsigned config" $sha"+ OK"
103
104         # Sign images with our dev keys
105         echo Sign images
106         ${mkimage} -D "${dtc}" -F -k dev-keys -K sandbox-u-boot.dtb \
107                 -r test.fit >${tmp}
108
109         run_uboot "signed config" "dev+"
110
111         echo check signed config on the host
112         if ! ${fit_check_sign} -f test.fit -k sandbox-u-boot.dtb >${tmp}; then
113                 echo
114                 echo "Verified boot key check on host failed, output follows:"
115                 cat ${tmp}
116                 false
117         else
118                 if ! grep -q "dev+" ${tmp}; then
119                         echo
120                         echo "Verified boot key check failed, output follows:"
121                         cat ${tmp}
122                         false
123                 else
124                         echo "OK"
125                 fi
126         fi
127
128         run_uboot "signed config" "dev+"
129
130         # Increment the first byte of the signature, which should cause failure
131         sig=$(fdtget -t bx test.fit /configurations/conf@1/signature@1 value)
132         newbyte=$(printf %x $((0x${sig:0:2} + 1)))
133         sig="${newbyte} ${sig:2}"
134         fdtput -t bx test.fit /configurations/conf@1/signature@1 value ${sig}
135
136         run_uboot "signed config with bad hash" "Bad Data Hash"
137 }
138
139 sha=sha1
140 do_test
141 sha=sha256
142 do_test
143
144 popd >/dev/null
145
146 echo
147 if ${ok}; then
148         echo "Test passed"
149 else
150         echo "Test failed"
151 fi