1PKI --ESTCA(1) strongSwan PKI --ESTCA(1)
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6 pki --estca - Get CA certificate[s] from an EST server
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9 pki --estca --url url [--label label] --cacert file [--caout file]
10 [--outform encoding] [--force] [--debug level]
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12 pki --estca --options file
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14 pki --estca -h | --help
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17 This sub-command of pki(1) gets CA certificates via https from an EST
18 server using the /cacerts operation of the Enrollment over Secure
19 Transport protocol (RFC 7030).
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22 -h, --help
23 Print usage information with a summary of the available options.
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25 -v, --debug level
26 Set debug level, default: 1.
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28 -+, --options file
29 Read command line options from file.
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31 -u, --url url
32 URL of the SCEP server.
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34 -l, --label label
35 Label in the EST server path.
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37 -C, --cacert file
38 CA certificate in the trust chain used for EST TLS server signa‐
39 ture verification. Can be used multiple times.
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41 -c, --caout file
42 If present, path where the fetched root CA certificate file is
43 stored to. If several CA certificates are downloaded, then the
44 value of --caout is used as a template to derive unique file‐
45 names (*-1, *-2, etc.) for the intermediate or sub CA certifi‐
46 cates. If a file suffix is missing, then depending on the value
47 of --outform either .der (the default) or .pem is automatically
48 appended. If the --caout option is missing and --outform is set
49 to pem then a PEM-encoded CA certificate bundle is written to
50 stdout.
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52 -f, --outform encoding
53 Encoding of the created certificate file. Either der (ASN.1 DER)
54 or pem (Base64 PEM), defaults to der.
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56 -F, --force
57 Force overwrite of existing files.
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60 To save some typing work the following command line options are stored
61 in a est.opt file:
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63 --url https://pki.strongswan.org:8443
64 --cacert tlsca.crt
65 --cacert tlsca-1.crt
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67 NOTE: For a successful HTTPS connection, trust must be established into
68 the EST server certificate. The TLS trust chain including the root CA
69 certificate and optionally intermediate CA certificates must be given
70 using multiple --cacert options.
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72 An EST server sends a root CA and an intermediate CA certificate:
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74 pki --estca --options est.opt --caout myca.crt
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76 negotiated TLS 1.3 using suite TLS_AES_256_GCM_SHA384
77 received TLS server certificate 'C=CH, O=strongSwan Project, CN=pki.strongswan.org'
78 using certificate "C=CH, O=strongSwan Project, CN=pki.strongswan.org"
79 using trusted intermediate ca certificate "C=CH, O=strongSwan Project, CN=strongSwan Issuing CA"
80 using trusted ca certificate "C=CH, O=strongSwan Project, CN=strongSwan Root CA"
81 reached self-signed root ca with a path length of 1
82 Root CA cert "C=CH, O=strongSwan Project, CN=strongSwan Root CA"
83 serial: 65:31:00:ca:79:da:16:6b:aa:ac:89:e2:a8:f9:49:c3:10:ab:64:54
84 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
85 SHA1 : 8e:f3:78:b0:34:a6:c1:6a:7b:c6:f5:91:eb:e5:46:9b:0d:0a:a7:ba (jvN4sDSmwWp7xvWR6+VGmw0Kp7o)
86 Root CA equals trusted TLS Root CA
87 Root CA cert is trusted, valid until Aug 12 15:51:34 2032, 'myca.crt'
88 Sub CA cert "C=CH, O=strongSwan Project, CN=strongSwan Issuing CA"
89 serial: 74:f9:7e:72:7d:b8:fd:f2:c6:e5:1b:fa:37:f9:cb:87:bf:9c:ea:e2
90 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
91 SHA1 : 8c:e6:67:67:c2:23:89:7b:d0:bc:b1:50:d2:1c:bc:8d:8d:69:15:11 (jOZnZ8IjiXvQvLFQ0hy8jY1pFRE)
92 using certificate "C=CH, O=strongSwan Project, CN=strongSwan Issuing CA"
93 using trusted ca certificate "C=CH, O=strongSwan Project, CN=strongSwan Root CA"
94 reached self-signed root ca with a path length of 0
95 Sub CA cert is trusted, valid until Aug 12 15:51:34 2027, 'myca-1.crt'
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97 NOTE: The trusthworthiness of the root CA certificate is either veri‐
98 fied automatically if the Root CA certificate of the TLS trust chain is
99 the same as that of the Issuing CA. Otherwise trust has to be estab‐
100 lished manually by verifying the SHA256 or SHA1 fingerprint of the DER-
101 encoded certificate that is e.g. listed on the official PKI website or
102 by some other means.
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104 The stored certificate files in DER format can be overwritten by PEM-
105 encoded versions with:
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107 pki --estca --options est.opt --caout myca.crt --outform pem --force
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109 A CA certificate bundle in PEM format is written to stdout:
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111 pki --estca --options est.opt --outform pem > cacerts.pem
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114 pki(1)
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1185.9.11 2022-08-22 PKI --ESTCA(1)