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+Source: letsencrypt-tiny
+Section: utils
+Priority: optional
+Maintainer: Guilhem Moulin <guilhem@guilhem.org>
+Build-Depends: debhelper (>= 9)
+Standards-Version: 3.9.6
+Vcs-Git: https://git.guilhem.org/letsencrypt-tiny
+Vcs-Browser: https://git.guilhem.org/letsencrypt-tiny
+
+Package: letsencrypt-tiny
+Architecture: all
+Depends: ${misc:Depends}, ${perl:Depends},
+ libwww-perl, libjson-perl, libconfig-tiny-perl,
+ libnet-ssleay-perl, openssl
+Recommends: liblwp-protocol-https-perl,
+ libcrypt-openssl-bignum-perl, libcrypt-openssl-rsa-perl
+Conflicts: letsencrypt
+Description: Tiny ACME client for Let's Encrypt
+ Tiny ACME client written with process isolation and minimal privileges in
+ mind.  It is divided into four components, each with its own executable:
+ .
+  * A process to manage the account key and issue SHA-256 signatures needed for
+    each ACME command.  (This process binds to a UNIX-domain socket to reply to
+    signature requests from the ACME client.)  One can use the UNIX-domain
+    socket forwarding facility of OpenSSH 6.7 and later to run this process on
+    a different host.
+ .
+  * A "master" process, which runs as root and is the only component
+    with access to the private key material of the server keys.  It is used to
+    fork the ACME client (and optionally the ACME webserver) after dropping
+    root privileges.  For certificate issuances, it also generates Certificate
+    Signing Requests, then verifies the validity of the issued certificate, and
+    optionally reloads or restarts services.
+ .
+  * An actual ACME client, which builds ACME commands and dialogues with
+    the remote ACME server.  Since ACME commands need to be signed with the
+    account key, the "master" process passes the UNIX-domain socket of the
+    account key manager to the ACME client: data signatures are requested by
+    writing the data to be signed to the socket.
+ .
+  * For certificate issuances, an optional webserver, which is spawned
+    by the "master" process when no service is listening on the HTTP port.
+    (The only challenge type currently supported is "http-01", which requires a
+    webserver to answer challenges.)  That webserver only processes GET and
+    HEAD requests under the "/.well-known/acme-challenge/" URI.  By default
+    some iptables(1) rules are automatically installed to open the HTTP port,
+    and removed afterwards.