net/data/ssl/scripts/generate-cross-signed-certs.sh

   1 #!/bin/sh
   2
   3 # Copyright 2013 The Chromium Authors. All rights reserved.
   4 # Use of this source code is governed by a BSD-style license that can be
   5 # found in the LICENSE file.
   6
   7 # This script generates a two roots - one legacy one signed with MD5, and
   8 # another (newer) one signed with SHA1 - and has a leaf certificate signed
   9 # by these without any distinguishers.
  10 #
  11 # The "cross-signed" comes from the fact that both the MD5 and SHA1 roots share
  12 # the same Authority Key ID, Subject Key ID, Subject, and Subject Public Key
  13 # Info. When the chain building algorithm is evaluating paths, if it prefers
  14 # untrusted over trusted, then it will see the MD5 certificate as a self-signed
  15 # cert that is "cross-signed" by the trusted SHA1 root.
  16 #
  17 # The SHA1 root should be (temporarily) trusted, and the resulting chain
  18 # should be leaf -> SHA1root, not leaf -> MD5root, leaf -> SHA1root -> MD5root,
  19 # or leaf -> MD5root -> SHA1root
  20
  21 try() {
  22   echo "$@"
  23   "$@" || exit 1
  24 }
  25
  26 try rm -rf out
  27 try mkdir out
  28
  29 try /bin/sh -c "echo 01 > out/2048-sha1-root-serial"
  30 try /bin/sh -c "echo 02 > out/2048-md5-root-serial"
  31 touch out/2048-sha1-root-index.txt
  32 touch out/2048-md5-root-index.txt
  33
  34 # Generate the key
  35 try openssl genrsa -out out/2048-sha1-root.key 2048
  36
  37 # Generate the root certificate
  38 CA_COMMON_NAME="Test Dup-Hash Root CA" \
  39   try openssl req \
  40     -new \
  41     -key out/2048-sha1-root.key \
  42     -out out/2048-sha1-root.req \
  43     -config ca.cnf
  44
  45 CA_COMMON_NAME="Test Dup-Hash Root CA" \
  46   try openssl x509 \
  47     -req -days 3650 \
  48     -sha1 \
  49     -in out/2048-sha1-root.req \
  50     -out out/2048-sha1-root.pem \
  51     -text \
  52     -signkey out/2048-sha1-root.key \
  53     -extfile ca.cnf \
  54     -extensions ca_cert
  55
  56 CA_COMMON_NAME="Test Dup-Hash Root CA" \
  57   try openssl x509 \
  58     -req -days 3650 \
  59     -md5 \
  60     -in out/2048-sha1-root.req \
  61     -out out/2048-md5-root.pem \
  62     -text \
  63     -signkey out/2048-sha1-root.key \
  64     -extfile ca.cnf \
  65     -extensions ca_cert
  66
  67 # Generate the leaf certificate request
  68 try openssl req \
  69   -new \
  70   -keyout out/ok_cert.key \
  71   -out out/ok_cert.req \
  72   -config ee.cnf
  73
  74 # Generate the leaf certificates
  75 CA_COMMON_NAME="Test Dup-Hash Root CA" \
  76   try openssl ca \
  77     -batch \
  78     -extensions user_cert \
  79     -days 3650 \
  80     -in out/ok_cert.req \
  81     -out out/ok_cert.pem \
  82     -config ca.cnf
  83
  84 try openssl x509 -text \
  85   -in out/2048-md5-root.pem \
  86   -out ../certificates/cross-signed-root-md5.pem
  87 try openssl x509 -text \
  88   -in out/2048-sha1-root.pem \
  89   -out ../certificates/cross-signed-root-sha1.pem
  90 try openssl x509 -text \
  91   -in out/ok_cert.pem \
  92   -out ../certificates/cross-signed-leaf.pem