PKI --ESTCA(1)                    strongSwan                    PKI --ESTCA(1)

NAME
       pki --estca - Get CA certificate[s] from an EST server

SYNOPSIS
       pki --estca --url url [--label label] --cacert file [--caout file]
                   [--outform encoding] [--force] [--debug level]

       pki --estca --options file

       pki --estca -h | --help

DESCRIPTION
       This sub-command of pki(1) gets CA certificates via https from an EST
       server using the /cacerts operation of the Enrollment over Secure
       Transport protocol (RFC 7030).

OPTIONS
       -h, --help
              Print usage information with a summary of the available options.

       -v, --debug level
              Set debug level, default: 1.

       -+, --options file
              Read command line options from file.

       -u, --url url
              URL of the SCEP server.

       -l, --label label
              Label in the EST server path.

       -C, --cacert file
              CA certificate in the trust chain used for EST TLS server
              signature verification.  Can be used multiple times.

       -c, --caout file
              If present, path where the fetched root CA certificate file is
              stored to.  If several CA certificates are downloaded, then the
              value of --caout is used as a template to derive unique
              filenames (*-1, *-2, etc.) for the intermediate or sub CA
              certificates.  If a file suffix is missing, then depending on
              the value of --outform either .der (the default) or .pem is
              automatically appended.  If the --caout option is missing and
              --outform is set to pem then a PEM-encoded CA certificate bundle
              is written to stdout.

       -f, --outform encoding
              Encoding of the created certificate file. Either der (ASN.1 DER)
              or pem (Base64 PEM), defaults to der.

       -F, --force
              Force overwrite of existing files.

EXAMPLES
       To save some typing work the following command line options are stored
       in a est.opt file:

       --url https://pki.strongswan.org:8443
       --cacert tlsca.crt
       --cacert tlsca-1.crt

       NOTE: For a successful HTTPS connection, trust must be established into
       the EST server certificate. The TLS trust chain including the root CA
       certificate and optionally intermediate CA certificates must be given
       using multiple --cacert options.

       An EST server sends a root CA and an intermediate CA certificate:

       pki --estca --options est.opt --caout myca.crt

       negotiated TLS 1.3 using suite TLS_AES_256_GCM_SHA384
       received TLS server certificate 'C=CH, O=strongSwan Project, CN=pki.strongswan.org'
         using certificate "C=CH, O=strongSwan Project, CN=pki.strongswan.org"
         using trusted intermediate ca certificate "C=CH, O=strongSwan Project, CN=strongSwan Issuing CA"
         using trusted ca certificate "C=CH, O=strongSwan Project, CN=strongSwan Root CA"
         reached self-signed root ca with a path length of 1
       Root CA cert "C=CH, O=strongSwan Project, CN=strongSwan Root CA"
         serial: 65:31:00:ca:79:da:16:6b:aa:ac:89:e2:a8:f9:49:c3:10:ab:64:54
         SHA256: 96:70:50:51:cd:b9:e7:94:6b:04:f6:15:45:80:fc:90:85:01:71:2a:f6:4f:d1:1b:2d:a1:7e:eb:bf:dd:be:86
         SHA1  : 8e:f3:78:b0:34:a6:c1:6a:7b:c6:f5:91:eb:e5:46:9b:0d:0a:a7:ba (jvN4sDSmwWp7xvWR6+VGmw0Kp7o)
       Root CA equals trusted TLS Root CA
       Root CA cert is trusted, valid until Aug 12 15:51:34 2032, 'myca.crt'
       Sub CA cert "C=CH, O=strongSwan Project, CN=strongSwan Issuing CA"
         serial: 74:f9:7e:72:7d:b8:fd:f2:c6:e5:1b:fa:37:f9:cb:87:bf:9c:ea:e2
         SHA256: a3:5b:4b:12:d5:8f:68:7b:05:11:08:27:f5:42:62:b8:b5:01:1b:19:37:9c:28:78:5d:37:08:69:6a:8c:07:bf
         SHA1  : 8c:e6:67:67:c2:23:89:7b:d0:bc:b1:50:d2:1c:bc:8d:8d:69:15:11 (jOZnZ8IjiXvQvLFQ0hy8jY1pFRE)
         using certificate "C=CH, O=strongSwan Project, CN=strongSwan Issuing CA"
         using trusted ca certificate "C=CH, O=strongSwan Project, CN=strongSwan Root CA"
         reached self-signed root ca with a path length of 0
       Sub CA cert is trusted, valid until Aug 12 15:51:34 2027, 'myca-1.crt'

       NOTE: The trusthworthiness of the root CA certificate is either
       verified automatically if the Root CA certificate of the TLS trust
       chain is the same as that of the Issuing CA. Otherwise trust has to be
       established manually by verifying the SHA256 or SHA1 fingerprint of the
       DER-encoded certificate that is e.g. listed on the official PKI website
       or by some other means.

       The stored certificate files in DER format can be overwritten by PEM-
       encoded versions with:

       pki --estca --options est.opt --caout myca.crt --outform pem --force

       A CA certificate bundle in PEM format is written to stdout:

       pki --estca --options est.opt --outform pem > cacerts.pem

SEE ALSO
       pki(1)

5.9.13                            2022-08-22                    PKI --ESTCA(1)