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https://github.com/Telecominfraproject/OpenCellular.git
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efa40aa21d
The existing keys are kept the same, so that old dev kernels and firmware remain compatible with new kernels and firmware. Change-Id: I4177d1868904a477d79b9f2e6de88ed756ed57b4 BUG=chrome-os-partner:2218 TEST=manual: Build firmware with new keys. Boot with dev switch on. Run 'crossystem mainfw_act mainfw_type'. Should see "A developer" Boot with dev switch off. Run 'crossystem mainfw_act mainfw_type'. Should see "B normal" Review URL: http://codereview.chromium.org/6580035
128 lines
3.9 KiB
Bash
Executable File
128 lines
3.9 KiB
Bash
Executable File
#!/bin/bash
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# Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
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# Use of this source code is governed by a BSD-style license that can be
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# found in the LICENSE file.
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#
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# Generate .vbpubk and .vbprivk pairs for use by developer builds. These should
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# be exactly like the real keys except that the private keys aren't secret.
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# 0 = (RSA1024 SHA1)
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# 1 = (RSA1024 SHA256)
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# 2 = (RSA1024 SHA512)
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# 3 = (RSA2048 SHA1)
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# 4 = (RSA2048 SHA256)
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# 5 = (RSA2048 SHA512)
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# 6 = (RSA4096 SHA1)
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# 7 = (RSA4096 SHA256)
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# 8 = (RSA4096 SHA512)
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# 9 = (RSA8192 SHA1)
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# 10 = (RSA8192 SHA256)
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# 11 = (RSA8192 SHA512)
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function alg_to_keylen {
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echo $(( 1 << (10 + ($1 / 3)) ))
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}
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# Emit .vbpubk and .vbprivk using given basename and algorithm
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# NOTE: This function also appears in ../../utility/dev_make_keypair. Making
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# the two implementations the same would require some common.sh, which is more
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# likely to cause problems than just keeping an eye out for any differences. If
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# you feel the need to change this file, check the history of that other file
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# to see what may need updating here too.
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function make_pair {
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local base=$1
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local alg=$2
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local len=$(alg_to_keylen $alg)
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echo "creating $base keypair..."
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# make the RSA keypair
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openssl genrsa -F4 -out "${base}_${len}.pem" $len
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# create a self-signed certificate
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openssl req -batch -new -x509 -key "${base}_${len}.pem" \
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-out "${base}_${len}.crt"
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# generate pre-processed RSA public key
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dumpRSAPublicKey -cert "${base}_${len}.crt" > "${base}_${len}.keyb"
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# wrap the public key
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vbutil_key \
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--pack "${base}.vbpubk" \
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--key "${base}_${len}.keyb" \
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--version 1 \
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--algorithm $alg
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# wrap the private key
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vbutil_key \
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--pack "${base}.vbprivk" \
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--key "${base}_${len}.pem" \
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--algorithm $alg
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# remove intermediate files
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rm -f "${base}_${len}.pem" "${base}_${len}.crt" "${base}_${len}.keyb"
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}
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# Emit a .keyblock containing flags and a public key, signed by a private key
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# flags are the bitwise OR of these (passed in decimal, though)
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# 0x01 Developer switch off
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# 0x02 Developer switch on
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# 0x04 Not recovery mode
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# 0x08 Recovery mode
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function make_keyblock {
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local base=$1
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local flags=$2
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local pubkey=$3
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local signkey=$4
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echo "creating $base keyblock..."
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# create it
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vbutil_keyblock \
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--pack "${base}.keyblock" \
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--flags $flags \
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--datapubkey "${pubkey}.vbpubk" \
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--signprivate "${signkey}.vbprivk"
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# verify it
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vbutil_keyblock \
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--unpack "${base}.keyblock" \
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--signpubkey "${signkey}.vbpubk"
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}
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# Create the normal keypairs
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make_pair root_key 11
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make_pair firmware_data_key 7
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make_pair dev_firmware_data_key 7
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make_pair kernel_subkey 7
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make_pair kernel_data_key 4
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# Create the recovery and factory installer keypairs
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make_pair recovery_key 11
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make_pair recovery_kernel_data_key 11
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make_pair installer_kernel_data_key 11
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# Create the firmware keyblock for use only in Normal mode. This is redundant,
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# since it's never even checked during Recovery mode.
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make_keyblock firmware 7 firmware_data_key root_key
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# Create the dev firmware keyblock for use only in Developer mode.
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make_keyblock dev_firmware 6 dev_firmware_data_key root_key
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# Create the recovery kernel keyblock for use only in Recovery mode.
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make_keyblock recovery_kernel 11 recovery_kernel_data_key recovery_key
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# Create the normal kernel keyblock for use only in Normal mode.
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make_keyblock kernel 7 kernel_data_key kernel_subkey
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# Create the installer keyblock for use in Developer + Recovery mode
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# For use in Factory Install and Developer Mode install shims.
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make_keyblock installer_kernel 10 installer_kernel_data_key recovery_key
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# CAUTION: The public parts of most of these blobs must be compiled into the
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# firmware, which is built separately (and some of which can't be changed after
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# manufacturing). If you update these keys, you must coordinate the changes
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# with the BIOS people or you'll be unable to boot the resulting images.
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