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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: 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)