pki---scepca - Get CA [and RA] certificate[s] from a SCEP server

NAME SYNOPSIS DESCRIPTION OPTIONS EXAMPLES SEE ALSO

NAME

pki −−scepca − Get CA [and RA] certificate[s] from a SCEP server

SYNOPSIS

	pki −−scepca		−−url url [−−caout file] [−−raout file] [−−outform encoding] [−−force] [−−debug level]
	pki −−scepca		−−options file
	pki −−scepca		−h \| −−help

DESCRIPTION

This sub-command of pki(1) gets CA and RA certificates via http from a SCEP server using the GetCACert command of the Simple Certificate Enrollment Protocol (RFC 8894).

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.

−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.

−r, −−raout file

If present, path where the fetched RA certificate file is stored to. If multiple RA certificates are available, then the value of −−raout is used as a template to derive unique filenames (*-2, etc.). If the −−raout option is missing, then the value of −−caout is used as a template to derive unique filenames (*-ra, *-ra-2, etc.) for the RA certificates. If a file suffix is missing, then depending on the value of −−outform either .der (the default) or .pem is automatically appended.

−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

A SCEP server sends a root CA and an intermediate CA certificate as well as an RA certificate:

pki −−scepca −−url http://pki.strongswan.org:8080/scep −−caout myca.crt −−raout myra.crt

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 cert is untrusted, 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’
RA cert "C=CH, O=strongSwan Project, CN=SCEP RA"
serial: 74:f9:7e:72:7d:b8:fd:f2:c6:e5:1b:fa:37:f9:cb:87:bf:9c:ea:e3
SHA256: 57:22:f3:13:69:2f:24:82:12:59:8e:05:63:0b:f5:a8:fb:4e:78:87:8d:68:d1:4c:c1:c4:b5:85:db:bb:64:df
SHA1 : bc:d1:46:76:55:7f:8c:d1:c5:22:31:b9:d7:b1:49:b5:95:a4:f3:ea (vNFGdlV/jNHFIjG517FJtZWk8+o)
using certificate "C=CH, O=strongSwan Project, CN=SCEP RA"
using untrusted intermediate 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
RA cert is trusted, valid until Aug 10 15:51:34 2023, ’myra.crt’

The trusthworthiness of the root CA certificate 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 −−scepca −−url http://pki.strongswan.org:8080/scep −−caout myca.crt −−raout myra.crt \
−−outform pem −−force

If the −−raout option is omitted and the −−caout template doesn’t have a file suffix, then with −−outform pem the following filenames are derived:

pki −−scepca −−url http://pki.strongswan.org:8080/scep −−caout scep/myca −−outform pem

Root CA cert "C=CH, O=strongSwan Project, CN=strongSwan Root CA"
...
Root CA cert is untrusted, valid until Aug 12 15:51:34 2032, written to ’scep/myca.pem’
Sub CA cert "C=CH, O=strongSwan Project, CN=strongSwan Issuing CA"
...
Sub CA cert is trusted, valid until Aug 12 15:51:34 2027, ’scep/myca-1.pem’
RA cert "C=CH, O=strongSwan Project, CN=SCEP RA"
...
RA cert is trusted, valid until Aug 10 15:51:34 2023, ’scep/myca-ra.pem’

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

pki −−scepca −−url http://pki.strongswan.org:8080/scep --raout myra.crt −−outform pem > cacerts.pem