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#!/bin/bash
# Copyright 2021 The Sigstore Authors.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
password=password123
duration=876000h # 100 years
tpl=temp.tpl
function generate_ed25519 {
echo $password > password.file
step certificate create \
--profile root-ca \
--not-after $duration \
--kty OKP \
--crv Ed25519 \
--password-file password.file \
ed25519 \
ed25519-cert.pem \
ed25519-key.pem
rm password.file
}
function generate_ecdsa {
echo $password > password.file
step certificate create \
--profile root-ca \
--not-after $duration \
--kty EC \
--crv P-384 \
--password-file password.file \
ecdsa \
ecdsa-cert.pem \
ecdsa-key.pem
rm password.file
}
function generate_rsa4096 {
echo $password > password.file
step certificate create \
--profile root-ca \
--not-after $duration \
--kty RSA \
--size 4096 \
--password-file password.file \
rsa4096 \
rsa4096-cert.pem \
rsa4096-key.pem
rm password.file
}
function generate_openssl {
# OpenSSL uses a different encryption format
# than step so lets makes sure that works
openssl req -x509 \
-newkey ed25519 \
-sha256 \
-keyout openssl-key.pem \
-out openssl-cert.pem \
-subj "/CN=openssl" \
-days 36500 \
-addext basicConstraints=critical,CA:TRUE,pathlen:1 \
-passout pass:"$password"
}
function generate_key_mismatch {
echo $password > password.file
step certificate create \
--profile root-ca \
--not-after $duration \
--kty OKP \
--crv Ed25519 \
--password-file password.file \
mismatch \
temp-cert.pem \
temp-key.pem
step certificate create \
--profile root-ca \
--not-after $duration \
--kty OKP \
--crv Ed25519 \
--password-file password.file \
mismatch \
mismatch-cert.pem \
mismatch-key.pem
mv temp-key.pem mismatch-key.pem
rm temp-cert.pem
rm password.file
}
function generate_not_a_ca {
echo $password > password.file
step certificate create \
--ca ed25519-cert.pem \
--ca-key ed25519-key.pem \
--ca-password-file password.file \
--profile leaf \
--not-after $duration \
--kty OKP \
--crv Ed25519 \
--password-file password.file \
notca \
notca-cert.pem \
notca-key.pem
rm password.file
}
function generate_intermediate_2_ca {
echo $password > password.file
# Root CA
cat <<-EOF > root.tpl
{
"subject": {
"commonName": "root"
},
"issuer": {
"commonName": "root"
},
"keyUsage": ["certSign", "crlSign"],
"basicConstraints": {
"isCA": true,
"maxPathLen": 1
}
}
EOF
step certificate create \
--template root.tpl \
--password-file password.file \
--not-after $duration \
root \
root-cert.pem \
root-key.pem \
rm root.tpl
# Intermediate 1
cat <<-EOF > intermediate1.tpl
{
"subject": {
"commonName": "intermediate1"
},
"keyUsage": ["certSign", "crlSign"],
"extKeyUsage": ["codeSigning"],
"basicConstraints": {
"isCA": true
}
}
EOF
step certificate create \
--template intermediate1.tpl \
--password-file password.file \
--not-after $duration \
--kty OKP \
--curve Ed25519 \
--ca root-cert.pem \
--ca-key root-key.pem \
--ca-password-file password.file \
intermediate1 \
intermediate1-cert.pem \
intermediate1-key.pem \
rm root-key.pem
rm intermediate1.tpl
# Chain certificates together and delete unneeded ones
cat intermediate1-cert.pem root-cert.pem > intermediate-2-cert.pem
mv intermediate1-key.pem intermediate-2-key.pem
rm intermediate1-cert.pem root-cert.pem
rm password.file
}
function generate_intermediate_3_ca {
echo $password > password.file
# Root CA
cat <<-EOF > root.tpl
{
"subject": {
"commonName": "root"
},
"issuer": {
"commonName": "root"
},
"keyUsage": ["certSign", "crlSign"],
"basicConstraints": {
"isCA": true,
"maxPathLen": 2
}
}
EOF
step certificate create \
--template root.tpl \
--password-file password.file \
--not-after $duration \
root \
root-cert.pem \
root-key.pem \
rm root.tpl
# Intermediate 1
cat <<-EOF > intermediate1.tpl
{
"subject": {
"commonName": "intermediate1"
},
"keyUsage": ["certSign", "crlSign"],
"extKeyUsage": ["codeSigning"],
"basicConstraints": {
"isCA": true,
"maxPathLen": 1
}
}
EOF
step certificate create \
--template intermediate1.tpl \
--password-file password.file \
--not-after $duration \
--kty OKP \
--curve Ed25519 \
--ca root-cert.pem \
--ca-key root-key.pem \
--ca-password-file password.file \
intermediate1 \
intermediate1-cert.pem \
intermediate1-key.pem \
rm root-key.pem
rm intermediate1.tpl
# Intermediate 2
cat <<-EOF > intermediate2.tpl
{
"subject": {
"commonName": "intermediate2"
},
"keyUsage": ["certSign", "crlSign"],
"extKeyUsage": ["codeSigning"],
"basicConstraints": {
"isCA": true
}
}
EOF
step certificate create \
--template intermediate2.tpl \
--password-file password.file \
--not-after $duration \
--ca intermediate1-cert.pem \
--ca-key intermediate1-key.pem \
--ca-password-file password.file \
intermediate2 \
intermediate2-cert.pem \
intermediate2-key.pem \
rm intermediate1-key.pem
rm intermediate2.tpl
# Chain certificates together and delete unneeded ones
cat intermediate2-cert.pem intermediate1-cert.pem root-cert.pem > intermediate-3-cert.pem
mv intermediate2-key.pem intermediate-3-key.pem
rm intermediate2-cert.pem intermediate1-cert.pem root-cert.pem
rm password.file
}
function generate_eku_chaining_violation {
echo $password > password.file
# Root CA
cat <<-EOF > root.tpl
{
"subject": {
"commonName": "root"
},
"issuer": {
"commonName": "root"
},
"keyUsage": ["certSign", "crlSign"],
"basicConstraints": {
"isCA": true,
"maxPathLen": 2
}
}
EOF
step certificate create \
--template root.tpl \
--password-file password.file \
--not-after $duration \
root \
root-cert.pem \
root-key.pem \
rm root.tpl
# Intermediate 1
# NB: This intermediate lacks code signing extended key usage so its in
# violation of extended key usage chaining a should _not_ load.
cat <<-EOF > intermediate1.tpl
{
"subject": {
"commonName": "intermediate1"
},
"keyUsage": ["certSign", "crlSign"],
"extKeyUsage": ["codeSigning"],
"basicConstraints": {
"isCA": true,
"maxPathLen": 1
}
}
EOF
step certificate create \
--template intermediate1.tpl \
--password-file password.file \
--not-after $duration \
--kty OKP \
--curve Ed25519 \
--ca root-cert.pem \
--ca-key root-key.pem \
--ca-password-file password.file \
intermediate1 \
intermediate1-cert.pem \
intermediate1-key.pem \
rm root-key.pem
rm intermediate1.tpl
# Intermediate 2
# NB: This intermediate lacks code signing extended key usage so its in
# violation of extended key usage chaining a should _not_ load.
cat <<-EOF > intermediate2.tpl
{
"subject": {
"commonName": "intermediate2"
},
"keyUsage": ["certSign", "crlSign"],
"basicConstraints": {
"isCA": true
}
}
EOF
step certificate create \
--template intermediate2.tpl \
--password-file password.file \
--not-after $duration \
--ca intermediate1-cert.pem \
--ca-key intermediate1-key.pem \
--ca-password-file password.file \
intermediate2 \
intermediate2-cert.pem \
intermediate2-key.pem \
rm intermediate1-key.pem
rm intermediate2.tpl
# Chain certificates together and delete unneeded ones
cat intermediate2-cert.pem intermediate1-cert.pem root-cert.pem > eku-chaining-violation-cert.pem
mv intermediate2-key.pem eku-chaining-violation-key.pem
rm intermediate2-cert.pem intermediate1-cert.pem root-cert.pem
rm password.file
}
generate_ed25519
generate_ecdsa
generate_rsa4096
generate_openssl
generate_key_mismatch
generate_not_a_ca
generate_intermediate_2_ca
generate_intermediate_3_ca
generate_eku_chaining_violation
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