1. Prerequisites
----------------
-You will need working installations of Zlib and OpenSSL.
+You will need working installations of Zlib and libcrypto (LibreSSL /
+OpenSSL)
Zlib 1.1.4 or 1.2.1.2 or greater (ealier 1.2.x versions have problems):
http://www.gzip.org/zlib/
-OpenSSL 0.9.6 or greater:
-http://www.openssl.org/
+libcrypto (LibreSSL or OpenSSL >= 0.9.8f)
+LibreSSL http://www.libressl.org/ ; or
+OpenSSL http://www.openssl.org/
-(OpenSSL 0.9.5a is partially supported, but some ciphers (SSH protocol 1
-Blowfish) do not work correctly.)
+LibreSSL/OpenSSL should be compiled as a position-independent library
+(i.e. with -fPIC) otherwise OpenSSH will not be able to link with it.
+If you must use a non-position-independent libcrypto, then you may need
+to configure OpenSSH --without-pie.
The remaining items are optional.
NB. If you operating system supports /dev/random, you should configure
-OpenSSL to use it. OpenSSH relies on OpenSSL's direct support of
-/dev/random, or failing that, either prngd or egd
+libcrypto (LibreSSL/OpenSSL) to use it. OpenSSH relies on libcrypto's
+direct support of /dev/random, or failing that, either prngd or egd
PRNGD:
EGD:
-The Entropy Gathering Daemon (EGD) is supported if you have a system which
-lacks /dev/random and don't want to use OpenSSH's internal entropy collection.
+If the kernel lacks /dev/random the Entropy Gathering Daemon (EGD) is
+supported only if libcrypto supports it.
-http://www.lothar.com/tech/crypto/
+http://egd.sourceforge.net/
PAM:
http://www.jmknoble.net/software/x11-ssh-askpass/
-TCP Wrappers:
-
-If you wish to use the TCP wrappers functionality you will need at least
-tcpd.h and libwrap.a, either in the standard include and library paths,
-or in the directory specified by --with-tcp-wrappers. Version 7.6 is
-known to work.
-
-http://ftp.porcupine.org/pub/security/index.html
-
S/Key Libraries:
If you wish to use --with-skey then you will need the library below
http://www.thrysoee.dk/editline/
http://sourceforge.net/projects/libedit/
+LDNS:
+
+LDNS is a DNS BSD-licensed resolver library which supports DNSSEC.
+
+http://nlnetlabs.nl/projects/ldns/
+
Autoconf:
If you modify configure.ac or configure doesn't exist (eg if you checked
-the code out of CVS yourself) then you will need autoconf-2.61 to rebuild
+the code out of CVS yourself) then you will need autoconf-2.68 to rebuild
the automatically generated files by running "autoreconf". Earlier
versions may also work but this is not guaranteed.
--with-skey=PATH will enable S/Key one time password support. You will
need the S/Key libraries and header files installed for this to work.
---with-tcp-wrappers will enable TCP Wrappers (/etc/hosts.allow|deny)
-support.
-
--with-md5-passwords will enable the use of MD5 passwords. Enable this
if your operating system uses MD5 passwords and the system crypt() does
not support them directly (see the crypt(3/3c) man page). If enabled, the
--with-xauth=PATH specifies the location of the xauth binary
---with-ssl-dir=DIR allows you to specify where your OpenSSL libraries
+--with-ssl-dir=DIR allows you to specify where your Libre/OpenSSL
+libraries
are installed.
---with-ssl-engine enables OpenSSL's (hardware) ENGINE support
+--with-ssl-engine enables Libre/OpenSSL's (hardware) ENGINE support
--with-4in6 Check for IPv4 in IPv6 mapped addresses and convert them to
real (AF_INET) IPv4 addresses. Works around some quirks on Linux.
http://www.openssh.com/
-$Id: INSTALL,v 1.86 2011/05/05 03:48:37 djm Exp $
+$Id: INSTALL,v 1.91 2014/09/09 02:23:11 dtucker Exp $
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