title: Should the certificate signing request generated from a self signed certificate using openssl show extensions attributes?
body: <p>I have a self signed certificate which shows basic constraints listed, but a signing request generated from it doesn't show these attributes such as [v3_req]. How can I make it visible? I am using openssl for certificate generation.</p>
  
  <p>Scenario:</p>
  
  <p>I create a self signed certificate using:
  openssl req -x509 -nodes -days 365 -newkey rsa:2048 -keyout privateKey.key -out certificate.crt -config openssl.conf</p>
  
  <p>When I check the certificate, it shows required extensions:
  openssl x509 -in certificate.crt -text -noout</p>
  
  <p>Now I create a CSR from this
  openssl x509 -x509toreq -in certificate.crt -out CSR.csr -signkey privateKey.key</p>
  
  <p>When I check the CSR using:
  openssl req -text -noout -verify -in CSR.csr</p>
  
  <p>It doesn't show required extensions.</p>
  
  <p>My openssl.conf file</p>
  
  <p><div class="snippet" data-lang="js" data-hide="false">
  <div class="snippet-code">
  <pre class="snippet-code-html lang-html prettyprint-override"><code>#
  # 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
  
  # 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' and 'req'.
  # Add a simple OID like this:
  # testoid1=1.2.3.4
  # Or use config file substitution like this:
  # testoid2=${testoid1}.5.6
  
  ####################################################################
  [ ca ]
  default_ca = CA_default  # The default ca section
  
  ####################################################################
  [ CA_default ]
  
  dir  = ./demoCA  # 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.
  new_certs_dir = $dir/newcerts  # default place for new certs.
  
  certificate = $dir/cacert.pem  # The CA certificate
  serial  = $dir/serial   # The current serial number
  crl  = $dir/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  # The extentions to add to the cert
  
  # 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.
  # crl_extensions = crl_ext
  
  default_days = 365   # how long to certify for
  default_crl_days= 30   # how long before next CRL
  default_md = md5   # which md to use.
  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  = 1024
  default_keyfile  = privkey.pem
  distinguished_name = req_distinguished_name
  attributes  = req_attributes
  x509_extensions = v3_ca # The extentions 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.
  # utf8only: only UTF8Strings.
  # nombstr : PrintableString, T61String (no BMPStrings or UTF8Strings).
  # MASK:XXXX a literal mask value.
  # WARNING: current versions of Netscape crash on BMPStrings or UTF8Strings
  # so use this option with caution!
  string_mask = nombstr
  
  req_extensions = v3_req # The extensions to add to a certificate request
  
  [ req_distinguished_name ]
  countryName   = Country Name (2 letter code)
  countryName_default  = AU
  countryName_min   = 2
  countryName_max   = 2
  
  stateOrProvinceName  = State or Province Name (full name)
  stateOrProvinceName_default = Some-State
  
  localityName   = Locality Name (eg, city)
  
  0.organizationName  = Organization Name (eg, company)
  0.organizationName_default = Internet Widgits Pty Ltd
  
  # we can do this but it is not needed normally :-)
  #1.organizationName  = Second Organization Name (eg, company)
  #1.organizationName_default = World Wide Web Pty Ltd
  
  organizationalUnitName  = Organizational Unit Name (eg, section)
  #organizationalUnitName_default =
  
  commonName   = Common Name (eg, YOUR name)
  commonName_max   = 64
  
  emailAddress   = Email Address
  emailAddress_max  = 40
  
  # SET-ex3   = SET extension number 3
  
  [ req_attributes ]
  challengePassword  = A challenge password
  challengePassword_min  = 4
  challengePassword_max  = 20
  
  unstructuredName  = An optional company name
  
  [ usr_cert ]
  
  # These extensions are added when 'ca' signs a request.
  
  # 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
  
  # 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
  
  # For an object signing certificate this would be used.
  # nsCertType = objsign
  
  # For normal client use this is typical
  # nsCertType = client, email
  
  # and for everything including object signing:
  # nsCertType = client, email, objsign
  
  # This is typical in keyUsage for a client certificate.
  # keyUsage = nonRepudiation, digitalSignature, keyEncipherment
  
  # This will be displayed in Netscape's comment listbox.
  nsComment   = "OpenSSL Generated Certificate"
  
  # PKIX recommendations harmless if included in all certificates.
  subjectKeyIdentifier=hash
  authorityKeyIdentifier=keyid,issuer:always
  
  # This stuff is for subjectAltName and issuerAltname.
  # Import the email address.
  # subjectAltName=email:copy
  
  # Copy subject details
  # issuerAltName=issuer:copy
  
  #nsCaRevocationUrl  = http://www.domain.dom/ca-crl.pem
  #nsBaseUrl
  #nsRevocationUrl
  #nsRenewalUrl
  #nsCaPolicyUrl
  #nsSslServerName
  
  [ 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:always
  
  # 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. However since it will
  # prevent it being used as an test self-signed certificate it is best
  # left out by default.
  # keyUsage = cRLSign, keyCertSign
  
  # 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
  
  # DER hex encoding of an extension: beware experts only!
  # obj=DER:02:03
  # Where 'obj' is a standard or added object
  # You can even override a supported extension:
  # basicConstraints= critical, DER:30:03:01:01:FF
  
  [ crl_ext ]
  
  # CRL extensions.
  # Only issuerAltName and authorityKeyIdentifier make any sense in a CRL.
  
  # issuerAltName=issuer:copy
  authorityKeyIdentifier=keyid:always,issuer:always</code></pre>
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