xref: /aosp_15_r20/external/cronet/net/data/ssl/scripts/generate-redundant-test-chains.sh (revision 6777b5387eb2ff775bb5750e3f5d96f37fb7352b)

#!/bin/sh

# Copyright 2012 The Chromium Authors
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

# This script generates two chains of test certificates:
#
#     1. A (end-entity) -> B -> C -> D (self-signed root)
#     2. A (end-entity) -> B -> C2 (self-signed root)
#
# in which A, B, C, and D have distinct keypairs. C2 is a self-signed root
# certificate that uses the same keypair as C.
#
# We use these cert chains in
# SSLClientSocketTest.VerifyReturnChainProperlyOrdered to ensure that
# SSLInfo objects see the certificate chain as validated rather than as
# served by the server. The server serves chain 1. The client has C2, NOT D,
# installed as a trusted root. Therefore, the chain will validate as chain
# 2, even though the server served chain 1.

try () {
  echo "$@"
  "$@" || exit 1
}

try rm -rf out
try mkdir out

echo Create the serial number files.
serial=1000
for i in B C C2 D
do
  try /bin/sh -c "echo $serial > out/$i-serial"
  serial=$(expr $serial + 1)
done

echo Generate the keys.
try openssl genrsa -out out/A.key 2048
try openssl genrsa -out out/B.key 2048
try openssl genrsa -out out/C.key 2048
try openssl genrsa -out out/D.key 2048

echo Generate the D CSR.
CA_COMMON_NAME="D Root CA" \
  CERTIFICATE=D \
  try openssl req \
    -new \
    -key out/D.key \
    -out out/D.csr \
    -config redundant-ca.cnf

echo D signs itself.
CA_COMMON_NAME="D Root CA" \
  try openssl x509 \
    -req -days 3650 \
    -in out/D.csr \
    -extensions ca_cert \
    -extfile redundant-ca.cnf \
    -signkey out/D.key \
    -out out/D.pem \
    -text

echo Generate the C2 root CSR.
CA_COMMON_NAME="C CA" \
  CERTIFICATE=C2 \
  try openssl req \
    -new \
    -key out/C.key \
    -out out/C2.csr \
    -config redundant-ca.cnf

echo C2 signs itself.
CA_COMMON_NAME="C CA" \
  try openssl x509 \
    -req -days 3650 \
    -in out/C2.csr \
    -extensions ca_cert \
    -extfile redundant-ca.cnf \
    -signkey out/C.key \
    -out out/C2.pem \
    -text

echo Generate the B and C intermediaries\' CSRs.
for i in B C
do
  name="$i Intermediate CA"
  CA_COMMON_NAME="$i CA" \
    CERTIFICATE=$i \
    try openssl req \
      -new \
      -key out/$i.key \
      -out out/$i.csr \
      -config redundant-ca.cnf
done

echo D signs the C intermediate.
# Make sure the signer's DB file exists.
touch out/D-index.txt
CA_COMMON_NAME="D Root CA" \
  CERTIFICATE=D \
  try openssl ca \
    -batch \
    -extensions ca_cert \
    -in out/C.csr \
    -out out/C.pem \
    -config redundant-ca.cnf

echo C signs the B intermediate.
touch out/C-index.txt
CA_COMMON_NAME="C CA" \
  CERTIFICATE=C \
  try openssl ca \
    -batch \
    -extensions ca_cert \
    -in out/B.csr \
    -out out/B.pem \
    -config redundant-ca.cnf

echo Generate the A end-entity CSR.
try openssl req \
  -new \
  -key out/A.key \
  -out out/A.csr \
  -config ee.cnf

echo B signs A.
touch out/B-index.txt
CA_COMMON_NAME="B CA" \
  CERTIFICATE=B \
  try openssl ca \
    -batch \
    -extensions user_cert \
    -in out/A.csr \
    -out out/A.pem \
    -config redundant-ca.cnf

# EmbeddedTestServer only supports PKCS#8 format.
try openssl pkcs8 -topk8 -nocrypt -in out/A.key -out out/A-pkcs8.key

echo Create redundant-server-chain.pem
try /bin/sh -c "cat out/A-pkcs8.key out/A.pem out/B.pem out/C.pem out/D.pem \
    > ../certificates/redundant-server-chain.pem"

echo Create redundant-validated-chain.pem
try /bin/sh -c "cat out/A-pkcs8.key out/A.pem out/B.pem out/C2.pem \
  > ../certificates/redundant-validated-chain.pem"

echo Create redundant-validated-chain-root.pem
try cp out/C2.pem ../certificates/redundant-validated-chain-root.pem