---
name: "estclient"
section: "1"
platform: "linux"
package: "libest-utils"
version: "3.2.0+ds-1.1"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/estclient"
---

# estclient(1)

example EST client application using the granular API

## NAME

estclient - example EST client application using the granular API

## OPTIONS

- **-v**

  Verbose operation

- **-g**

  Get CA certificate from EST server

- **-e**

  Enroll with EST server and request a cert

- **-q**

  Enroll with EST server and request a cert and a server-side generated private key

- **-a**

  Get CSR attributes from EST server

- **-z**

  Force binding the PoP by including the challengePassword in the CSR

- **-r**

  Re-enroll with EST server and request a cert, must use -c option

- **-c** *certfile*

  Identity certificate to use for the TLS session

- **-k** *keyfile*

  Use with -c option to specify private key for the identity cert

- **-x** *keyfile*

  Use existing private key in the given file for signing the CSR

- **-y** *csrfile*

  Use existing CSR in the given file

- **-s** *server*

  Enrollment server IP address

- **-p** *port*

  TCP port number for enrollment server

- **-o** *dir*

  Directory where pkcs7 certs will be written

- **-i** *count*

  Number of enrollments to perform per thread (default=1)

- **-w** *count*

  Timeout in seconds to wait for server response (default=10)

- **-f**

  Runs EST Client in FIPS MODE = ON

- **-u** *string*

  Specify user name for HTTP authentication.

- **-h** *string*

  Specify password for HTTP authentication.

- **-?**

  Print this help message and exit.

- **--keypass\_stdin**

  Specify en-/decryption of private key, password read from STDIN

- **--keypass\_arg**

  Specify en-/decryption of private key, password read from argument

- **--common-name** *string*

  Specify the common name to use in the Suject Name field of the new certificate. 127.0.0.1 will be used if this option is not specified

- **--pem-output**

  Convert the new certificate to PEM format

- **--srp**

  Enable TLS-SRP cipher suites.  Use with --srp-user and --srp-password options.

- **--srp-user** *string*

  Specify the SRP user name.

- **--srp-password** *string*

  Specify the SRP password.

- **--auth-token** *string*

  Specify the token to be used with HTTP token authentication.

- **--path-seg** *string*

  Specify the optional path segment to use in the URI.

- **--proxy-server** *string*

  Proxy server to enable SOCK/HTTP proxy mode.

- **--proxy-port** *port*

  Proxy port number.  Must include proxy-server.

- **--proxy-proto** EST\_CLIENT\_PROXY\_PROTO

  Proxy protocol.

- **--proxy-auth** BASIC\|NTLM

  Proxy authentication method.

- **--proxy-username** *string*

  username to pass to proxy server.

- **--proxy-password** *string*

  password to pass to proxy server.

## COPYRIGHT & LICENSE

Copyright (c) 2012-2018 Cisco Systems, Inc.  All rights reserved.

License (BSD-3-Clause):

```
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
Redistributions of source code must retain the above copyright
  notice, this list of conditions and the following disclaimer.
Redistributions in binary form must reproduce the above
  copyright notice, this list of conditions and the following
  disclaimer in the documentation and/or other materials provided
  with the distribution.
Neither the name of the Cisco Systems, Inc. nor the names of its
  contributors may be used to endorse or promote products derived
  from this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
OF THE POSSIBILITY OF SUCH DAMAGE.
```

## AUTHOR

This manpage is based on estclient's usage output and the included documentation. It was written for the Debian project by Christoph Biedl \<debian.axhn@manchmal.in-ulm.de\> but may be used by others.