====== IKEDv2 Windows support ======


===== Server side =====

OpenBSD's default **/etc/ssl/openssl.cnf** provides a very minimalist approach, especially if you plan to allow users under other Operating Systems to login.

<code bash>
$ cat /etc/ssl/openssl.cnf

# Note that you can include other files from the main configuration
# file using the .include directive.
#.include filename
 
# This definition stops the following lines choking if HOME isn't
# defined.
HOME            = .
 
# Extra OBJECT IDENTIFIER info:
#oid_file       = $ENV::HOME/.oid
oid_section     = new_oids
 
# To use this configuration file with the "-extfile" option of the
# "openssl x509" utility, name here the section containing the
# X.509v3 extensions to use:
# extensions        =
# (Alternatively, use a configuration file that has only
# X.509v3 extensions in its main [= default] section.)
 
[ new_oids ]
 
# We can add new OIDs in here for use by 'ca', 'req' and 'ts'.
# Add a simple OID like this:
# testoid1=1.2.3.4
# Or use config file substitution like this:
# testoid2=${testoid1}.5.6
 
# Policies used by the TSA examples.
tsa_policy1 = 1.2.3.4.1
tsa_policy2 = 1.2.3.4.5.6
tsa_policy3 = 1.2.3.4.5.7
 
####################################################################
[ ca ]
default_ca  = IRCNow        # The default ca section
 
####################################################################
[ IRCNow ]
 
dir     = /etc/ssl      # Where everything is kept
certs       = $dir/certs        # Where the issued certs are kept
crl_dir     = $dir/crl      # Where the issued crl are kept
database    = $dir/index.txt    # database index file.
#unique_subject = no            # Set to 'no' to allow creation of
                    # several certs with same subject.
new_certs_dir   = $dir/newcerts     # default place for new certs.
 
certificate = $dir/cacert.pem   # The CA certificate
serial      = $dir/serial       # The current serial number
crlnumber   = $dir/crlnumber    # the current crl number
                    # must be commented out to leave a V1 CRL
crl     = $dir/crl.pem      # The current CRL
private_key = $dir/private/cakey.pem# The private key
 
x509_extensions = usr_cert      # The extensions to add to the cert
 
name_opt    = IRCNow        # Subject Name options
cert_opt    = IRCNow        # Certificate field options
default_days    = 365           # how long to certify for
default_crl_days= 365           # how long before next CRL
default_md  = default       # use public key default MD
preserve    = no            # keep passed DN ordering
 
# A few difference way of specifying how similar the request should look
# For type CA, the listed attributes must be the same, and the optional
# and supplied fields are just that :-)
policy      = policy_match
 
# For the CA policy
[ policy_match ]
countryName     = match
stateOrProvinceName = match
organizationName    = match
organizationalUnitName  = optional
commonName      = supplied
emailAddress        = optional
 
# For the 'anything' policy
# At this point in time, you must list all acceptable 'object'
# types.
[ policy_anything ]
countryName     = optional
stateOrProvinceName = optional
localityName        = optional
organizationName    = optional
organizationalUnitName  = optional
commonName      = supplied
emailAddress        = optional
 
####################################################################
[ req ]
default_bits        = 2048
default_keyfile     = privkey.pem
distinguished_name  = req_distinguished_name
attributes      = req_attributes
x509_extensions = v3_ca # The extensions to add to the self signed cert
string_mask = utf8only
req_extensions = v3_req
 
[ req_distinguished_name ]
countryName         = TW
countryName_default     = TW
countryName_min         = 2
countryName_max         = 2
 
stateOrProvinceName     = Taiwan
stateOrProvinceName_default = Taiwan
 
localityName            = Taichung
 
0.organizationName      = IRCNow
0.organizationName_default  = IRCNow
 
organizationalUnitName      = Operations
#organizationalUnitName_default =
 
commonName          = vpn.ircnow.org
commonName_max          = 64
 
emailAddress            = pirata@ircnow.org
emailAddress_max        = 64
 
# SET-ex3           = SET extension number 3
 
[ req_attributes ]
challengePassword       = A challenge password
challengePassword_min       = 4
challengePassword_max       = 20
 
unstructuredName        = IRCNow
 
[ v3_ca ]
subjectKeyIdentifier=hash
authorityKeyIdentifier=keyid:always,issuer
basicConstraints = critical, CA:TRUE, pathlen:3
keyUsage = critical, cRLSign, keyCertSign
nsCertType = sslCA, emailCA
 
[ v3_req ]
basicConstraints = CA:FALSE
keyUsage = nonRepudiation, digitalSignature, keyEncipherment
#extendedKeyUsage=serverAuth
subjectAltName = @alt_names
 
[ alt_names ]
DNS.1 = vpn.ircnow.org
DNS.2 = IPv4
DNS.3 = IPv6
 
[ usr_cert ]
basicConstraints=CA:FALSE
nsComment           = "OpenSSL Generated Certificate"
 
[ crl_ext ]
 
authorityKeyIdentifier=keyid:always
 
[ proxy_cert_ext ]
 
basicConstraints=CA:FALSE
nsComment           = "OpenSSL Generated Certificate"
 
# PKIX recommendations harmless if included in all certificates.
subjectKeyIdentifier=hash
authorityKeyIdentifier=keyid,issuer
</code>

We had to replicate some part of **/etc/ssl/openssl.cnf** into local **openssl.cfg** in order to be able to generate proper keys and certificates.

<code bash>
$ cat openssl.cfg

[ vpn.ircnow.org ]
keyUsage = digitalSignature,keyEncipherment
extendedkeyUsge = 1.3.6.1.5.5.8.2.2,serverAuth
subjectAltName = DNS:vpn.ircnow.org
basicConstraints=CA:False
crlDistributionPoints = URI:https://vpn.ircnow.org/ca.crl
 
[ ca ]
default_ca = IRCNow
 
[ IRCNow ]
database = index.txt
default_md      = default
private_key     = ca.key.pem
certificate = ca.pem
x509_extensions = usr_cert
default_days    = 365                  
default_crl_days= 365
 
[ req ]
distinguished_name      = req_distinguished_name
x509_extensions = v3_ca
req_extensions = v3_req
string_mask = utf8only
 
[ v3_ca ]
subjectKeyIdentifier=hashOrdered List Item
authorityKeyIdentifier=keyid:always,issuer
basicConstraints = critical, CA:TRUE, pathlen:3
keyUsage = critical, cRLSign, keyCertSign
nsCertType = sslCA, emailCA
 
[ v3_req ]
basicConstraints = CA:FALSE
keyUsage = nonRepudiation, digitalSignature, keyEncipherment
#extendedKeyUsage=serverAuth
subjectAltName = @alt_names
 
[ alt_names ]
DNS.1 = vpn.ircnow.org
DNS.2 = IPv4
DNS.3 = IPv6
 
[ usr_cert ]
basicConstraints=CA:FALSE
nsComment                       = "OpenSSL Generated Certificate"
 
[ req_distinguished_name ]
countryName                     = TW
countryName_default             = TW
countryName_min                 = 2
countryName_max                 = 2
 
stateOrProvinceName             = Taiwan
stateOrProvinceName_default     = Taiwan
 
localityName                    = Taichung
 
0.organizationName              = IRCNow
0.organizationName_default      = IRCNow
 
organizationalUnitName          = Operations
 
commonName                      = vpn.ircnow.org
commonName_max                  = 64
 
emailAddress                    = pirata@ircnow.org
emailAddress_max                = 64
</code>

After some trial and error, We managed to discover a magical combination of openssl commands that allowed us to generate all certs and keys:

<code bash>
openssl req -new -x509 -subj "/CN=IRCNow" -extensions v3_ca -days 365 -key ca.key.pem -sha256 -out ca.pem -config openssl.cfg
openssl genrsa -out vpnircnow.key.pem 2048
openssl req -subj "/CN=vpnircnow" -extensions v3_req -sha256 -new -key vpnircnow.key.pem -out vpnircnow.csr
openssl x509 -req -extensions v3_req -days 365 -sha256 -in vpnircnow.csr -CA ca.pem -CAkey ca.key.pem -CAcreateserial -out vpnircnow.crt -extfile openssl.cfg
cat vpnircnow.crt ca.pem vpnircnow.key.pem > vpnircnow-ca-full.pem
openssl pkcs12 -export -out vpnircnow.pfx -inkey vpnircnow.key.pem -in vpnircnow.crt -certfile ca.pem
openssl ca -config openssl.cfg -gencrl -out ca.crl
</code>

And finally, host **ca.crl**, **ca.crt** and **vpnIRCNoWin.pfx** on httpd so our Windows users can:

===== Download our certificates =====

  - **[[https://vpn.ircnow.org/ca.crt|ca.crt]]**
  - **[[https://vpn.ircnow.org/vpnIRCNoWin.pfx|vpnIRCNoWin.pfx]]**
===== Windows side =====

  - Disable **Windows extended certificates checks** on Windows Registry (Run... > **regedit**)
    - Under **HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\RasMan\Parameters\** add a **DWORD** and named it **DisableIKENameEkuCheck**
    - Save the changes and import it
  - Following this excellent [[https://wiki.strongswan.org/projects/strongswan/wiki/Win7Certs|guide]] from strongSwan community and import our **ca.crt**(direct links above) certificate first and then **vpnIRCNoWin.pfx** (direct links above)
  - Make sure:
    - Both certificates are located under **Trusted Root Certification Authorities** > **Certificates**
    - Password of our private key is **gad03efbanxg5yby**
   - Configure an IKEDv2 connection using this [[http://www.carbonwind.net/blog/post/VPN-Reconnect-in-Windows-7-RC-redux.aspx|guide]] if you don't know how to do that
   - Make sure:
     - Under Security tab, type of VPN is **IKEv2**
     - Authentication is **EAP + Secure password (EAP-MSCHAPv2)**
     - Under general tab, host name is **vpn.ircnow.org**

Last thing:

  - Create a VPN connection under **Settings > Network & Internet** using this [[https://hide.me/en/vpnsetup/windows10/ikev2/|guide]] 
    - But execute this powershell command instead:

<code powershell>
Add-VpnConnection -Name "IRCNow VPN" -ServerAddress "vpn.ircnow.org" -TunnelType "Ikev2" -RememberCredential
</code>

  - The only thing left to do is to input your **user** and **password**