OLD | NEW |
(Empty) | |
| 1 #!/bin/bash -e |
| 2 # Copyright (c) 2010 The Chromium OS Authors. All rights reserved. |
| 3 # Use of this source code is governed by a BSD-style license that can be |
| 4 # found in the LICENSE file. |
| 5 # |
| 6 |
| 7 # Check args first. |
| 8 if [ "$#" -lt "1" ]; then |
| 9 cat <<EOF 1>&2 |
| 10 |
| 11 Usage: ${0##*/} BASENAME [ALG] |
| 12 |
| 13 This creates BASENAME.vbpubk and BASENAME.vbprivk pairs for use in signing |
| 14 developer files. This also creates a BASENAME.keyblock file containing the |
| 15 BASENAME.vbpubk, which can be used to sign a developer kernel. |
| 16 |
| 17 If specified, ALG is one of: |
| 18 |
| 19 0 = RSA1024 with SHA1 |
| 20 1 = RSA1024 with SHA256 |
| 21 2 = RSA1024 with SHA512 |
| 22 3 = RSA2048 with SHA1 |
| 23 4 = RSA2048 with SHA256 |
| 24 5 = RSA2048 with SHA512 |
| 25 6 = RSA4096 with SHA1 |
| 26 7 = RSA4096 with SHA256 |
| 27 8 = RSA4096 with SHA512 |
| 28 9 = RSA8192 with SHA1 |
| 29 10 = RSA8192 with SHA256 |
| 30 11 = RSA8192 with SHA512 |
| 31 |
| 32 If ALG is not specified, a default value will be used. |
| 33 |
| 34 EOF |
| 35 exit 1 |
| 36 fi |
| 37 |
| 38 |
| 39 # Compute the key length assuming the sizes shown above. |
| 40 function alg_to_keylen { |
| 41 echo $(( 1 << (10 + ($1 / 3)) )) |
| 42 } |
| 43 |
| 44 # Emit .vbpubk and .vbprivk using given basename and algorithm. |
| 45 function make_pair { |
| 46 local base=$1 |
| 47 local alg=$2 |
| 48 local len=$(alg_to_keylen $alg) |
| 49 |
| 50 # make the RSA keypair |
| 51 openssl genrsa -F4 -out "${base}_${len}.pem" $len |
| 52 # create a self-signed certificate |
| 53 openssl req -batch -new -x509 -key "${base}_${len}.pem" \ |
| 54 -out "${base}_${len}.crt" |
| 55 # generate pre-processed RSA public key |
| 56 dumpRSAPublicKey "${base}_${len}.crt" > "${base}_${len}.keyb" |
| 57 |
| 58 # wrap the public key |
| 59 vbutil_key \ |
| 60 --pack "${base}.vbpubk" \ |
| 61 --key "${base}_${len}.keyb" \ |
| 62 --version 1 \ |
| 63 --algorithm $alg |
| 64 |
| 65 # wrap the private key |
| 66 vbutil_key \ |
| 67 --pack "${base}.vbprivk" \ |
| 68 --key "${base}_${len}.pem" \ |
| 69 --algorithm $alg |
| 70 |
| 71 # remove intermediate files |
| 72 rm -f "${base}_${len}.pem" "${base}_${len}.crt" "${base}_${len}.keyb" |
| 73 } |
| 74 |
| 75 # First create the .vbpubk and .vbprivk pair. |
| 76 make_pair "$1" "${2:-4}" |
| 77 |
| 78 # Now create a .vblock to hold our .vbpubk. Since it's for developer use, it |
| 79 # won't be signed, just checksummed. Developer kernels can only be run in |
| 80 # non-recovery mode with the developer switch enabled, but it won't hurt us to |
| 81 # turn on all the flags bits anyway. |
| 82 vbutil_keyblock --pack "$1.keyblock" --datapubkey "$1.vbpubk" --flags 15 |
OLD | NEW |