94 lines
2.7 KiB
Plaintext
94 lines
2.7 KiB
Plaintext
libssh2 - SSH2 library
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======================
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libssh2 is a library implementing the SSH2 protocol, available under
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the revised BSD license.
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Generic installation instructions are in INSTALL. Some ./configure
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options deserve additional comments:
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* --enable-crypt-none
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The SSH2 Transport allows for unencrypted data
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transmission using the "none" cipher. Because this is
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such a huge security hole, it is typically disabled on
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SSH2 implementations and is diabled in libssh2 by
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default as well.
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Enabling this option will allow for "none" as a
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negotiable method, however it still requires that the
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method be advertized by the remote end and that no
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more-prefferable methods are available.
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* --enable-mac-none
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The SSH2 Transport also allows implementations to
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forego a message authentication code. While this is
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less of a security risk than using a "none" cipher, it
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is still not recommended as disabling MAC hashes
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removes a layer of security.
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Enabling this option will allow for "none" as a
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negotiable method, however it still requires that the
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method be advertized by the remote end and that no
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more-prefferable methods are available.
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* --disable-gex-new
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The diffie-hellman-group-exchange-sha1 (dh-gex) key
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exchange method originally defined an exchange
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negotiation using packet type 30 to request a
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generation pair based on a single target value. Later
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refinement of dh-gex provided for range and target
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values. By default libssh2 will use the newer range
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method.
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If you experience trouble connecting to an old SSH
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server using dh-gex, try this option to fallback on
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the older more reliable method.
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* --with-libgcrypt
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* --with-libgcrypt-prefix=DIR
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libssh2 can use the Libgcrypt library
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(http://www.gnupg.org/) for cryptographic operations.
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Configure will attempt to locate Libgcrypt in the
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default location, but if you have installed it
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somewhere else, use the --with-libgrypt-prefic=DIR
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parameter.
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* --with-openssl=[DIR]
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libssh2 can use the OpenSSL library
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(http://www.openssl.org) for cryptographic operations.
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Configure will attempt to locate OpenSSL in a number
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of default locations:
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/usr/local/ssl
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/usr/local
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/usr
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/usr/local/openssl
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If your installation of OpenSSL is in another
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location, specify it here.
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* --with-libz=[DIR]
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If present, libssh2 will attempt to use the zlib (http://www.zlib.org)
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for payload compression, however zlib is not required.
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Configure will attempt to location a zlib installation
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in a number of default locations:
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/usr/local
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/usr
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/usr/local/libz
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/usr/libz
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/usr/local/zlib
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/usr/zlib
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If your installation of zlib is in another location,
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you may specify it here.
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