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79 lines
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79 lines
2.8 KiB
Plaintext
SSLsplit - transparent and scalable SSL/TLS interception
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Copyright (C) 2009-2014, Daniel Roethlisberger <daniel@roe.ch>
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http://www.roe.ch/SSLsplit
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## Overview
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SSLsplit is a tool for man-in-the-middle attacks against SSL/TLS encrypted
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network connections. Connections are transparently intercepted through a
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network address translation engine and redirected to SSLsplit. SSLsplit
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terminates SSL/TLS and initiates a new SSL/TLS connection to the original
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destination address, while logging all data transmitted. SSLsplit is intended
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to be useful for network forensics and penetration testing.
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SSLsplit supports plain TCP, plain SSL, HTTP and HTTPS connections over both
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IPv4 and IPv6. For SSL and HTTPS connections, SSLsplit generates and signs
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forged X509v3 certificates on-the-fly, based on the original server certificate
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subject DN and subjectAltName extension. SSLsplit fully supports Server Name
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Indication (SNI) and is able to work with RSA, DSA and ECDSA keys and DHE and
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ECDHE cipher suites. SSLsplit can also use existing certificates of which the
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private key is available, instead of generating forged ones. SSLsplit supports
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NULL-prefix CN certificates and can deny OCSP requests in a generic way.
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SSLsplit removes HPKP response headers in order to prevent public key pinning.
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See the manual page sslsplit(1) for details on using SSLsplit and setting up
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the various NAT engines.
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## Requirements
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SSLsplit depends on the OpenSSL and libevent 2.x libraries.
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The build depends on GNU make and a POSIX.2 environment in `PATH`.
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The optional unit tests depend on the check library.
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SSLsplit currently supports the following operating systems and NAT mechanisms:
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- FreeBSD: pf rdr and divert-to, ipfw fwd, ipfilter rdr
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- OpenBSD: pf rdr-to and divert-to
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- Linux: netfilter REDIRECT and TPROXY
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- Mac OS X: ipfw fwd and pf rdr (experimental)
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## Installation
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make
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make test # optional unit tests
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make install # optional install
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Dependencies are autoconfigured using pkg-config. If dependencies are not
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picked up and fixing `PKG_CONFIG_PATH` does not help, you can specify their
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respective locations manually by setting `OPENSSL_BASE`, `LIBEVENT_BASE` and/or
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`CHECK_BASE` to the respective prefixes.
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You can override the default install prefix (`/usr/local`) by setting `PREFIX`.
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## Development
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SSLsplit is being developed on Github. For bug reports, please use the Github
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issue tracker. For patch submissions, please send me pull requests.
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https://github.com/droe/sslsplit
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## License
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SSLsplit is provided under the simplified BSD license.
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SSLsplit contains components licensed under the MIT and APSL licenses.
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See the respective source file headers for details.
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## Credits
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SSLsplit was inspired by mitm-ssl by Claes M. Nyberg and sslsniff by Moxie
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Marlinspike, but shares no source code with them.
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SSLsplit includes khash.h by Attractive Chaos.
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