samba at 0111.ch
2020-Dec-07 14:13 UTC
[Samba] Certificates for Smartscard-Login: "oid exists"-error
Hello There,
I am currently trying to create certificates, which will be used for logins via
smartcard and I'm following his guide:
https://wiki.samba.org/index.php/Samba_AD_Smart_Card_Login
When creating the certificates, I'll get this error:
problem creating object scardLogin=1.3.6.1.4.1.311.20.2.2
140074235937920:error:08064066:object identifier routines:OBJ_create:oid
exists:../crypto/objects/obj_dat.c:709:
When I comment out the line "scardLogin=1.3.6.1.4.1.311.20.2.2".
it'll throw an error for the next OID. When I comment out all new OIDs, I
can create the ca-certificate. Server certificates, too, but they miss an OID. I
did not yet try to create user certificates, because this way they would miss
the OIDs.
Here my openssl.conf:
```
#
# Based on the OpenSSL example configuration file.
# This is mostly being used for generation of certificate requests.
#
# This definition stops the following lines choking if HOME isn't
# defined.
HOME = .
RANDFILE = $ENV::HOME/.rnd
CRLDISTPT = http://crl.example.com/example.crl
# Extra OBJECT IDENTIFIER info:
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 ]
# Ordinarily, certificates must have this oid as an enhanced key usage in order
for Windows to allow them to be used as a login credential
scardLogin = 1.3.6.1.4.1.311.20.2.2
# Used in a smart card login certificate's subject alternative name
msUPN=1.3.6.1.4.1.311.20.2.3
# Ordinarily, certificates must have this oid as an enhanced key usage in order
for Windows to allow them to be used to identify a domain controller
msKDC=1.3.6.1.5.2.3.5
# Identifies the AD GUID
msADGUID=1.3.6.1.4.1.311.25.1
####################################################################
[ ca ]
default_ca = CA_default # The default ca section
####################################################################
[ CA_default ]
dir = . # 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 = yes # Set to 'no' to allow creation of
# several certificates 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/ca-crl.pem # The current CRL
private_key = $dir/private/cakey.pem # The private key
RANDFILE = $dir/private/.rand # private random number file
x509_extensions = usr_cert_mskdc # The extensions to add to the cert
# Comment out the following two lines for the "traditional"
# (and highly broken) format.
name_opt = ca_default # Subject Name options
cert_opt = ca_default # Certificate field options
# Extension copying option: use with caution.
# copy_extensions = copy
# Extensions to add to a CRL. Note: Netscape communicator chokes on V2 CRLs
# so this is commented out by default to leave a V1 CRL.
# crlnumber must also be commented out to leave a V1 CRL.
crl_extensions = crl_ext
default_days = 1095 # how long to certify for
default_crl_days= 30 # how long before next CRL
default_md = sha256 # 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 = match
stateOrProvinceName = match
localityName = match
organizationName = match
organizationalUnitName = match
commonName = supplied
emailAddress = supplied
####################################################################
[ 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
# Passwords for private keys if not present they will be prompted for
# input_password = secret
# output_password = secret
# This sets a mask for permitted string types. There are several options.
# default: PrintableString, T61String, BMPString.
# pkix : PrintableString, BMPString (PKIX recommendation before 2004)
# utf8only: only UTF8Strings (PKIX recommendation after 2004).
# nombstr : PrintableString, T61String (no BMPStrings or UTF8Strings).
# MASK:XXXX a literal mask value.
# WARNING: ancient versions of Netscape crash on BMPStrings or UTF8Strings.
string_mask = utf8only
# req_extensions = v3_req # The extensions to add to a certificate request
[ req_distinguished_name ]
countryName = Country Name (2 letter code)
countryName_default = CH
countryName_min = 2
countryName_max = 2
stateOrProvinceName = State or Province Name (full name)
stateOrProvinceName_default = STATE
localityName = Locality Name (eg, city)
localityName_default = CITY
organizationName = Organization Name (eg, company)
organizationName_default = Example inc.
#organizationalUnitName = Organizational Unit Name (eg, section)
commonName = Common Name (eg, YOUR name)
commonName_max = 64
emailAddress = Email Address
emailAddress_max = 64
# SET-ex3 = SET extension number 3
[ req_attributes ]
challengePassword = A challenge password
challengePassword_min = 4
challengePassword_max = 20
#unstructuredName = An optional company name
[ v3_req ]
# Extensions to add to a certificate request
basicConstraints = CA:FALSE
keyUsage = nonRepudiation, digitalSignature, keyEncipherment
[ v3_ca ]
# Extensions for a typical CA
# PKIX recommendation.
subjectKeyIdentifier=hash
authorityKeyIdentifier=keyid:always,issuer
# This is what PKIX recommends but some broken software chokes on critical
# extensions.
#basicConstraints = critical,CA:true
# So we do this instead.
basicConstraints = CA:true
# Key usage: this is typical for a CA certificate.
keyUsage = cRLSign, keyCertSign
crlDistributionPoints=URI:$CRLDISTPT
# Some might want this also
nsCertType = sslCA, emailCA
# Include email address in subject alt name: another PKIX recommendation
subjectAltName=email:copy
# Copy issuer details
issuerAltName=issuer:copy
[ crl_ext ]
# CRL extensions.
# Only issuerAltName and authorityKeyIdentifier make any sense in a CRL.
issuerAltName=issuer:copy
authorityKeyIdentifier=keyid:always
[ usr_cert_mskdc ]
# These extensions are added when 'ca' signs a request for a domain
controller certificate.
# This goes against PKIX guidelines but some CAs do it and some software
# requires this to avoid interpreting an end user certificate as a CA.
basicConstraints=CA:FALSE
crlDistributionPoints=URI:$CRLDISTPT
# Here are some examples of the usage of nsCertType. If it is omitted
# the certificate can be used for anything *except* object signing.
# This is OK for an SSL server.
nsCertType = server
# This is typical in keyUsage for a client certificate.
keyUsage = nonRepudiation, digitalSignature, keyEncipherment
# This will be displayed in Netscape's comment listbox.
nsComment = "Domain Controller Certificate"
# PKIX recommendations harmless if included in all certificates.
subjectKeyIdentifier=hash
authorityKeyIdentifier=keyid,issuer
# This stuff is for subjectAltName and issuerAltname.
subjectAltName=@dc_subjalt
# Copy subject details
issuerAltName=issuer:copy
nsCaRevocationUrl = $CRLDISTPT
#nsBaseUrl
#nsRevocationUrl
#nsRenewalUrl
#nsCaPolicyUrl
#nsSslServerName
#Extended Key requirements for our domain controller certs
# serverAuth - says cert can be used to identify an ssl/tls server
# msKDC - says cert can be used to identify a Kerberos Domain Controller.
extendedKeyUsage = clientAuth,serverAuth,msKDC
[dc_subjalt]
DNS=DC1.int.example.com
otherName=msADGUID;FORMAT:HEX,OCTETSTRING:464A3A73D50257419A6D1438AA584EF3
```
OpenSSL is installed in version 1.1.1
I think a workaround might be to use the OID directly instead of the variable,
but I hope someone has an idea how to do it with the names.
Regards, Alain