SSLsplit supports plain TCP, plain SSL, HTTP and HTTPS connections over both IPv4 and IPv6. For SSL and HTTPS connections, SSLsplit generates and signs forged X509v3 certificates on-the-fly, based on the original server certificate subject DN and subjectAltName extension. SSLsplit fully supports Server Name Indication (SNI) and is able to work with RSA, DSA and ECDSA keys and DHE and ECDHE cipher suites. SSLsplit can also use existing certificates of which the private key is available, instead of generating forged ones. SSLsplit supports NULL-prefix CN certificates and can deny OCSP requests in a generic way.
SSLsplit depends on the OpenSSL and libevent 2.x libraries. The build depends on GNU make and a POSIX.2 environment in `PATH`. The (optional) unit tests depend on check.
SSLsplit currently supports the following operating systems and NAT engines:
- FreeBSD: pf rdr, ipfw fwd, ipfilter rdr
- OpenBSD: pf rdr
- Linux: netfilter REDIRECT and TPROXY
- Mac OS X: ipfw fwd
make test # optional unit tests
make install # optional install
Dependencies are autoconfigured using pkg-config. If dependencies are not
picked up and fixing `PKG_CONFIG_PATH` does not help, you can specify their
respective locations manually by setting `OPENSSL_BASE`, `LIBEVENT_BASE` and/or
`CHECK_BASE` to the respective prefixes.
You can override the default install prefix (`/usr/local`) by setting `PREFIX`.
SSLsplit is being developed on Github. For bug reports, please use the Github
issue tracker. For patch submissions, please send me pull requests.