Implemented automated certificate generation.
Removed existing certificates as private key was shared. Updated makefile to require certificate generation.
This commit is contained in:
3
.gitignore
vendored
3
.gitignore
vendored
@@ -5,3 +5,6 @@ obj/*
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U2F_Priv_Keys.txt
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.ccls-cache
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compile_commands.json
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Certificates.hpp
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Certificates.cpp
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Keys/*
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@@ -1,74 +0,0 @@
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/*
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U2FDevice - A program to allow Raspberry Pi Zeros to act as U2F tokens
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Copyright (C) 2018 Michael Kuc
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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|
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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#include "Certificates.hpp"
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// You may not actually want to use these values -
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// having been shared publicly, these may be vulnerable to exploits.
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// However, generating your own attestation certificate makes your device
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// uniquely identifiable across platforms / services, etc.
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// You can generate your own using the method detailed in the README.
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uint8_t attestCert[] = {
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0x30, 0x82, 0x02, 0x29, 0x30, 0x82, 0x01, 0xd0, 0xa0, 0x03, 0x02, 0x01, 0x02, 0x02, 0x09, 0x00,
|
||||
0x8a, 0xe2, 0x21, 0x3f, 0x2f, 0x8b, 0x72, 0x52, 0x30, 0x0a, 0x06, 0x08, 0x2a, 0x86, 0x48, 0xce,
|
||||
0x3d, 0x04, 0x03, 0x02, 0x30, 0x70, 0x31, 0x0b, 0x30, 0x09, 0x06, 0x03, 0x55, 0x04, 0x06, 0x13,
|
||||
0x02, 0x55, 0x4b, 0x31, 0x13, 0x30, 0x11, 0x06, 0x03, 0x55, 0x04, 0x08, 0x0c, 0x0a, 0x53, 0x6f,
|
||||
0x6d, 0x65, 0x2d, 0x53, 0x74, 0x61, 0x74, 0x65, 0x31, 0x21, 0x30, 0x1f, 0x06, 0x03, 0x55, 0x04,
|
||||
0x0a, 0x0c, 0x18, 0x49, 0x6e, 0x74, 0x65, 0x72, 0x6e, 0x65, 0x74, 0x20, 0x57, 0x69, 0x64, 0x67,
|
||||
0x69, 0x74, 0x73, 0x20, 0x50, 0x74, 0x79, 0x20, 0x4c, 0x74, 0x64, 0x31, 0x29, 0x30, 0x27, 0x06,
|
||||
0x03, 0x55, 0x04, 0x03, 0x0c, 0x20, 0x55, 0x32, 0x46, 0x20, 0x4b, 0x65, 0x79, 0x20, 0x74, 0x50,
|
||||
0x46, 0x53, 0x71, 0x54, 0x71, 0x6f, 0x5a, 0x6d, 0x62, 0x37, 0x38, 0x61, 0x6a, 0x6f, 0x2f, 0x75,
|
||||
0x58, 0x50, 0x73, 0x51, 0x3d, 0x3d, 0x30, 0x1e, 0x17, 0x0d, 0x31, 0x38, 0x30, 0x36, 0x33, 0x30,
|
||||
0x31, 0x39, 0x30, 0x37, 0x35, 0x31, 0x5a, 0x17, 0x0d, 0x32, 0x38, 0x30, 0x36, 0x32, 0x37, 0x31,
|
||||
0x39, 0x30, 0x37, 0x35, 0x31, 0x5a, 0x30, 0x70, 0x31, 0x0b, 0x30, 0x09, 0x06, 0x03, 0x55, 0x04,
|
||||
0x06, 0x13, 0x02, 0x55, 0x4b, 0x31, 0x13, 0x30, 0x11, 0x06, 0x03, 0x55, 0x04, 0x08, 0x0c, 0x0a,
|
||||
0x53, 0x6f, 0x6d, 0x65, 0x2d, 0x53, 0x74, 0x61, 0x74, 0x65, 0x31, 0x21, 0x30, 0x1f, 0x06, 0x03,
|
||||
0x55, 0x04, 0x0a, 0x0c, 0x18, 0x49, 0x6e, 0x74, 0x65, 0x72, 0x6e, 0x65, 0x74, 0x20, 0x57, 0x69,
|
||||
0x64, 0x67, 0x69, 0x74, 0x73, 0x20, 0x50, 0x74, 0x79, 0x20, 0x4c, 0x74, 0x64, 0x31, 0x29, 0x30,
|
||||
0x27, 0x06, 0x03, 0x55, 0x04, 0x03, 0x0c, 0x20, 0x55, 0x32, 0x46, 0x20, 0x4b, 0x65, 0x79, 0x20,
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||||
0x74, 0x50, 0x46, 0x53, 0x71, 0x54, 0x71, 0x6f, 0x5a, 0x6d, 0x62, 0x37, 0x38, 0x61, 0x6a, 0x6f,
|
||||
0x2f, 0x75, 0x58, 0x50, 0x73, 0x51, 0x3d, 0x3d, 0x30, 0x59, 0x30, 0x13, 0x06, 0x07, 0x2a, 0x86,
|
||||
0x48, 0xce, 0x3d, 0x02, 0x01, 0x06, 0x08, 0x2a, 0x86, 0x48, 0xce, 0x3d, 0x03, 0x01, 0x07, 0x03,
|
||||
0x42, 0x00, 0x04, 0x32, 0x41, 0xc3, 0xb8, 0x96, 0x97, 0xd8, 0x90, 0x66, 0x41, 0x88, 0x96, 0xd4,
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0x73, 0xb6, 0x37, 0xf7, 0x85, 0x29, 0xaf, 0x3b, 0x15, 0x0f, 0x83, 0x61, 0x67, 0xea, 0xc9, 0xb2,
|
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0xdb, 0x82, 0xb3, 0x2c, 0x99, 0x60, 0x8a, 0x98, 0x7c, 0xd4, 0x04, 0xa0, 0x92, 0x22, 0x05, 0xaa,
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||||
0xf7, 0x7a, 0x91, 0x02, 0x03, 0xdd, 0x15, 0x88, 0x87, 0x6a, 0x26, 0xe9, 0xee, 0xcf, 0x99, 0xb1,
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0x66, 0xc0, 0x01, 0xa3, 0x53, 0x30, 0x51, 0x30, 0x1d, 0x06, 0x03, 0x55, 0x1d, 0x0e, 0x04, 0x16,
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0x04, 0x14, 0xcf, 0x7f, 0xfa, 0x7d, 0xc4, 0x8d, 0xba, 0x60, 0x52, 0x4c, 0xb6, 0x16, 0x2e, 0x88,
|
||||
0x62, 0xc7, 0x8c, 0xfc, 0xe0, 0x63, 0x30, 0x1f, 0x06, 0x03, 0x55, 0x1d, 0x23, 0x04, 0x18, 0x30,
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0x16, 0x80, 0x14, 0xcf, 0x7f, 0xfa, 0x7d, 0xc4, 0x8d, 0xba, 0x60, 0x52, 0x4c, 0xb6, 0x16, 0x2e,
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0x88, 0x62, 0xc7, 0x8c, 0xfc, 0xe0, 0x63, 0x30, 0x0f, 0x06, 0x03, 0x55, 0x1d, 0x13, 0x01, 0x01,
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0xff, 0x04, 0x05, 0x30, 0x03, 0x01, 0x01, 0xff, 0x30, 0x0a, 0x06, 0x08, 0x2a, 0x86, 0x48, 0xce,
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||||
0x3d, 0x04, 0x03, 0x02, 0x03, 0x47, 0x00, 0x30, 0x44, 0x02, 0x20, 0x72, 0x25, 0x89, 0xc1, 0x32,
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0x54, 0x66, 0xf8, 0x0e, 0x58, 0x77, 0xe3, 0xb5, 0x62, 0x47, 0x33, 0x18, 0x5a, 0xdc, 0x28, 0x6a,
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0x4a, 0x56, 0xcb, 0x58, 0x63, 0xe3, 0xa1, 0x02, 0x6a, 0xf0, 0xd8, 0x02, 0x20, 0x65, 0x26, 0x84,
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||||
0x7c, 0xc3, 0x3b, 0x7d, 0x6a, 0x22, 0x0c, 0x22, 0x3d, 0xc8, 0x43, 0xb7, 0x84, 0x8b, 0x7b, 0x48,
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||||
0x23, 0xb0, 0x1e, 0x13, 0x35, 0x1d, 0x1a, 0x90, 0x44, 0x62, 0x6c, 0xab, 0x9b
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};
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uint8_t attestPrivKey[] = { 0x7e, 0xbd, 0x91, 0x05, 0x5a, 0x80, 0x9f, 0x36, 0xe5, 0x2f, 0xe0,
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0xd0, 0xa9, 0x63, 0x0c, 0x86, 0x04, 0xb1, 0x04, 0xe3, 0xd1, 0xfb,
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0xd0, 0x83, 0xc7, 0x2e, 0x2f, 0x34, 0xb6, 0xd6, 0xa4, 0xb2 };
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uint8_t attestPubKey[] = { 0x04, 0x32, 0x41, 0xc3, 0xb8, 0x96, 0x97, 0xd8, 0x90, 0x66, 0x41,
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0x88, 0x96, 0xd4, 0x73, 0xb6, 0x37, 0xf7, 0x85, 0x29, 0xaf, 0x3b,
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0x15, 0x0f, 0x83, 0x61, 0x67, 0xea, 0xc9, 0xb2, 0xdb, 0x82, 0xb3,
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0x2c, 0x99, 0x60, 0x8a, 0x98, 0x7c, 0xd4, 0x04, 0xa0, 0x92, 0x22,
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0x05, 0xaa, 0xf7, 0x7a, 0x91, 0x02, 0x03, 0xdd, 0x15, 0x88, 0x87,
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0x6a, 0x26, 0xe9, 0xee, 0xcf, 0x99, 0xb1, 0x66, 0xc0, 0x01 };
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37
Certificates.cpp.template
Normal file
37
Certificates.cpp.template
Normal file
@@ -0,0 +1,37 @@
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/*
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U2FDevice - A program to allow Raspberry Pi Zeros to act as U2F tokens
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Copyright (C) 2018 Michael Kuc
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|
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This program is free software: you can redistribute it and/or modify
|
||||
it under the terms of the GNU General Public License as published by
|
||||
the Free Software Foundation, either version 3 of the License, or
|
||||
(at your option) any later version.
|
||||
|
||||
This program is distributed in the hope that 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 <https://www.gnu.org/licenses/>.
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*/
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#include "Certificates.hpp"
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// You may not actually want to use these values -
|
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// having been shared publicly, these may be vulnerable to exploits.
|
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// However, generating your own attestation certificate makes your device
|
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// uniquely identifiable across platforms / services, etc.
|
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// You can generate your own using the method detailed in the README.
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uint8_t attestCert[] = {
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// Generate attestation certificate here
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};
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uint8_t attestPrivKey[] = {
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// Generate private key here
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};
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uint8_t attestPubKey[] = {
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// Generate public key here
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};
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@@ -19,6 +19,6 @@ along with this program. If not, see <https://www.gnu.org/licenses/>.
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#pragma once
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#include <cstdint>
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extern uint8_t attestCert[557];
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extern uint8_t attestPrivKey[32];
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extern uint8_t attestPubKey[65];
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extern uint8_t attestCert[/* attestation certificate size */];
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extern uint8_t attestPrivKey[/* attestation private key size */];
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extern uint8_t attestPubKey[/* attestion public key size */];
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31
GenCertificates.sh
Executable file
31
GenCertificates.sh
Executable file
@@ -0,0 +1,31 @@
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#!/usr/bin/env sh
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sed --version | grep "GNU" 2>&1 1>/dev/null
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if [ $? -ne 0 ]; then
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printf "Requires the GNU version of SED.\n"
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return -1
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fi
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[ -d Keys ] || mkdir Keys
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openssl ecparam -name prime256v1 -genkey -noout -out Keys/ecprivkey.pem
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openssl ec -in Keys/ecprivkey.pem -pubout -out Keys/ecpubkey.pem 2>/dev/null
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openssl req -new -x509 -key Keys/ecprivkey.pem -out Keys/certificate.pem -days 3650
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openssl x509 -outform der -in Keys/certificate.pem -out Keys/certificate.der 2>/dev/null
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certificate="$(xxd --include Keys/certificate.der | sed -e '0,/{/d;/};/,$d' -e 's/^\s\+/\t/g')"
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certificateSize="$(printf "%s" "${certificate}" | wc -w)"
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printf "%s" "${certificate}" | sed -e '/\/\/ Generate attestation certificate here/{r/dev/stdin
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d }' Certificates.cpp.template > Keys/Certificates.cpp.template.1
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privkey="$(openssl ec -in Keys/ecprivkey.pem -pubout -text -noout 2>/dev/null | sed -e '0,/priv:/d;/pub:/,$d' -e 's/\s//g;s/:/, /g;' -e 's/^/\t/g;s/\s\+$//g' -e 's/\(\s\)/\10x/g')"
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privSize="$(printf "%s" "${privkey}" | wc -w)"
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printf "%s\n" "${privkey}" | sed -e '/\/\/ Generate private key here/{r/dev/stdin
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d }' Keys/Certificates.cpp.template.1 > Keys/Certificates.cpp.template.2
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pubkey="$(openssl ec -in Keys/ecprivkey.pem -pubout -text -noout 2>/dev/null | sed -e '0,/pub:/d;/ASN1/,$d' -e 's/\s//g;s/:/, /g;' -e 's/^/\t/g;s/\s\+$//g' -e 's/\(\s\)/\10x/g')"
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pubSize="$(printf "%s" "${pubkey}" | wc -w)"
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printf "%s\n" "${pubkey}" | sed -e '/\/\/ Generate public key here/{r/dev/stdin
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d }' Keys/Certificates.cpp.template.2 > Certificates.cpp
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sed -e "s/\\/\\* attestation certificate size \\*\\//${certificateSize}/; s/\\/\\* attestation private key size \\*\\//${privSize}/; s/\\/\\* attestion public key size \\*\\//${pubSize}/" Certificates.hpp.template > Certificates.hpp
|
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Binary file not shown.
@@ -1,5 +0,0 @@
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-----BEGIN EC PRIVATE KEY-----
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MHcCAQEEIH69kQVagJ825S/g0KljDIYEsQTj0fvQg8cuLzS21qSyoAoGCCqGSM49
|
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AwEHoUQDQgAEMkHDuJaX2JBmQYiW1HO2N/eFKa87FQ+DYWfqybLbgrMsmWCKmHzU
|
||||
BKCSIgWq93qRAgPdFYiHaibp7s+ZsWbAAQ==
|
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-----END EC PRIVATE KEY-----
|
||||
@@ -1,4 +0,0 @@
|
||||
-----BEGIN PUBLIC KEY-----
|
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MFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAEMkHDuJaX2JBmQYiW1HO2N/eFKa87
|
||||
FQ+DYWfqybLbgrMsmWCKmHzUBKCSIgWq93qRAgPdFYiHaibp7s+ZsWbAAQ==
|
||||
-----END PUBLIC KEY-----
|
||||
@@ -1 +0,0 @@
|
||||
~<7E><>Z<><5A>6<EFBFBD>/<2F>Щc <0C><04><04><><EFBFBD>Ѓ<EFBFBD>./4<>֤<EFBFBD>
|
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@@ -1 +0,0 @@
|
||||
2Aø<41><C3B8>ؐfA<66><41><EFBFBD>s<EFBFBD>7<EFBFBD><37>)<29>;<0F>ag<61>ɲۂ<C9B2>,<2C>`<60><>|<7C><04><>"<05><>z<EFBFBD><03><15><>j&<26><>ϙ<EFBFBD>f<EFBFBD>
|
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@@ -1,14 +0,0 @@
|
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-----BEGIN CERTIFICATE-----
|
||||
MIICKTCCAdCgAwIBAgIJAIriIT8vi3JSMAoGCCqGSM49BAMCMHAxCzAJBgNVBAYT
|
||||
AlVLMRMwEQYDVQQIDApTb21lLVN0YXRlMSEwHwYDVQQKDBhJbnRlcm5ldCBXaWRn
|
||||
aXRzIFB0eSBMdGQxKTAnBgNVBAMMIFUyRiBLZXkgdFBGU3FUcW9abWI3OGFqby91
|
||||
WFBzUT09MB4XDTE4MDYzMDE5MDc1MVoXDTI4MDYyNzE5MDc1MVowcDELMAkGA1UE
|
||||
BhMCVUsxEzARBgNVBAgMClNvbWUtU3RhdGUxITAfBgNVBAoMGEludGVybmV0IFdp
|
||||
ZGdpdHMgUHR5IEx0ZDEpMCcGA1UEAwwgVTJGIEtleSB0UEZTcVRxb1ptYjc4YWpv
|
||||
L3VYUHNRPT0wWTATBgcqhkjOPQIBBggqhkjOPQMBBwNCAAQyQcO4lpfYkGZBiJbU
|
||||
c7Y394UprzsVD4NhZ+rJstuCsyyZYIqYfNQEoJIiBar3epECA90ViIdqJunuz5mx
|
||||
ZsABo1MwUTAdBgNVHQ4EFgQUz3/6fcSNumBSTLYWLohix4z84GMwHwYDVR0jBBgw
|
||||
FoAUz3/6fcSNumBSTLYWLohix4z84GMwDwYDVR0TAQH/BAUwAwEB/zAKBggqhkjO
|
||||
PQQDAgNHADBEAiByJYnBMlRm+A5Yd+O1YkczGFrcKGpKVstYY+OhAmrw2AIgZSaE
|
||||
fMM7fWoiDCI9yEO3hIt7SCOwHhM1HRqQRGJsq5s=
|
||||
-----END CERTIFICATE-----
|
||||
12
Makefile
12
Makefile
@@ -1,6 +1,7 @@
|
||||
#!/usr/bin/env make
|
||||
|
||||
SRC_DIR := .
|
||||
KEY_DIR := Keys
|
||||
OBJ_DIR := obj
|
||||
CXXFLAGS := -std=c++11 -MMD -MP -Wall -Wfatal-errors -Wextra -fPIE
|
||||
LDFLAGS := -fPIE
|
||||
@@ -31,7 +32,7 @@ install: U2FDevice
|
||||
install -m775 -t /etc/systemd/system Services/U2FDevice.service
|
||||
install -d /usr/share/U2FDevice/
|
||||
|
||||
$(OBJ_DIR)/%.o: $(SRC_DIR)/%.cpp | $(OBJ_DIR)
|
||||
$(OBJ_DIR)/%.o: $(SRC_DIR)/%.cpp | $(OBJ_DIR) $(SRC_DIR)/Certificates.hpp
|
||||
$(CXX) $(STATIC) $(CXXFLAGS) -c -o $@ $<
|
||||
|
||||
$(OBJ_DIR):
|
||||
@@ -45,7 +46,14 @@ clean:
|
||||
$(MAKE) -C micro-ecc clean
|
||||
$(MAKE) -C cpp-base64 clean
|
||||
|
||||
.PHONY: clean install
|
||||
clean-certificates:
|
||||
rm -f $(KEY_DIR)/*
|
||||
rm -f Certificates.cpp Certificates.hpp
|
||||
|
||||
$(SRC_DIR)/Certificates.hpp: $(SRC_DIR)/Certificates.hpp.template
|
||||
$(error "Please run the GenCertificates.sh script to generate certificate before building\n")
|
||||
|
||||
.PHONY: clean clean-certificates install
|
||||
|
||||
libuECC.a:
|
||||
$(MAKE) -C micro-ecc
|
||||
|
||||
@@ -1,19 +1,20 @@
|
||||
From https://github.com/pratikd650/Teensy_U2F/blob/master/Teensy_U2F.cpp line 292
|
||||
From [Teensy U2F](https://github.com/pratikd650/Teensy_U2F/blob/master/Teensy_U2F.cpp) line 292
|
||||
|
||||
Instructions to generate attestation certificate using open ssl
|
||||
https://wiki.openssl.org/index.php/Command_Line_Elliptic_Curve_Operations
|
||||
https://www.guyrutenberg.com/2013/12/28/creating-self-signed-ecdsa-ssl-certificate-using-openssl/
|
||||
[OpenSSL wiki](https://wiki.openssl.org/index.php/Command_Line_Elliptic_Curve_Operations)
|
||||
[Guy Rutenberg](https://www.guyrutenberg.com/2013/12/28/creating-self-signed-ecdsa-ssl-certificate-using-openssl/)
|
||||
P-256 (also secp256r1) EC key pair is W = dG (Note secp256k1 is Koblitz curve - not P256)
|
||||
d = private key is it 256 bits (32 bytes)
|
||||
G = generator point - it is part of the curve definition
|
||||
W = public key point - it is a (256, 256) bits - 64 bytes
|
||||
|
||||
1) Generate a key pair - the private key will be saved in PKCS8 format in ecprivkey.pem
|
||||
|
||||
`openssl ecparam -name prime256v1 -genkey -noout -out ecprivkey.pem`
|
||||
|
||||
2) Dump out the private key in hex format - it will be a 32 byte key
|
||||
|
||||
`openssl asn1parse -in ecprivkey.pem`
|
||||
`openssl asn1parse -in ecprivkey.pem`
|
||||
|
||||
3) Compute the public key from the private key and the curve
|
||||
|
||||
@@ -41,20 +42,20 @@ For the Certificate name give a unique certificate name.
|
||||
|
||||
8) Generate a usable c-array for source code
|
||||
|
||||
`xxd --include certificate.der`
|
||||
`xxd --include certificate.der | sed -e '0,/{/d;/};/,$d'`
|
||||
|
||||
Copy output into appropriate array in 'Certificates.cpp', overwriting existing values
|
||||
|
||||
9) Repeat steps 7 & 8 for public key and private key
|
||||
9) Find the public key
|
||||
|
||||
So:
|
||||
`openssl ec -in ecprivkey.pem -pubout -text -noout 2>/dev/null | sed -e '0,/priv:/d;/pub:/,$d' -e 's/\s//g;s/:/, /g' -e 's/^/\t/g;s/\s\+$//g' -e 's/\(\s\)/\10x/g'`
|
||||
|
||||
```
|
||||
openssl asn1parse -in ecprivkey.pem 2>/dev/null | grep 'HEX DUMP' | perl -pe 's/^.*\[HEX DUMP\]:(.+)$/$1/' 2>/dev/null | xxd -r -p > privkey.der && xxd --include privkey.der
|
||||
10) Find the private key
|
||||
|
||||
openssl ec -in ecprivkey.pem -pubout -text 2>/dev/null | perl -0777 -ne 'print /pub:.+ASN1/sg' 2>/dev/null | sed -e '/pub:/d;/ASN1/d' | perl -pe 's/^\s+(.+):?$/$1/gm' 2>/dev/null | perl -pe 's/\n//' 2>/dev/null | perl -pe 's/(.{2}):?/$1/g' 2>/dev/null | xxd -r -p > pubkey.der && xxd --include pubkey.der
|
||||
```
|
||||
`openssl ec -in ecprivkey.pem -pubout -text -noout 2>/dev/null | sed -e '0,/pub:/d;/ASN1/,$d' | sed -e 's/\s//g;s/:/, /g' -e 's/^/\t/g;s/\s\+$//g' -e 's/\(\s\)/\10x/g'`
|
||||
|
||||
and copy the arrays into the correct arrays in Certificates.cpp.
|
||||
11)
|
||||
|
||||
Copy the arrays into the correct arrays in Certificates.cpp.
|
||||
|
||||
If any arrays have different lengths than shown in Certificates.hpp, update these too.
|
||||
|
||||
Reference in New Issue
Block a user