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mirror repository of the tor core protocol in case of issues
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This module is currently implemented to use the same technique as libottery (later used by the bsds' arc4random replacement), using AES-CTR-256 as its underlying stream cipher. It's backtracking- resistant immediately after each call, and prediction-resistant after a while. Here's how it works: We generate psuedorandom bytes using AES-CTR-256. We generate BUFLEN bytes at a time. When we do this, we keep the first SEED_LEN bytes as the key and the IV for our next invocation of AES_CTR, and yield the remaining BUFLEN - SEED_LEN bytes to the user as they invoke the PRNG. As we yield bytes to the user, we clear them from the buffer. Every RESEED_AFTER times we refill the buffer, we mix in an additional SEED_LEN bytes from our strong PRNG into the seed. If the user ever asks for a huge number of bytes at once, we pull SEED_LEN bytes from the PRNG and use them with our stream cipher to fill the user's request. |
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doc | ||
m4 | ||
scripts | ||
src | ||
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acinclude.m4 | ||
autogen.sh | ||
ChangeLog | ||
CODE_OF_CONDUCT | ||
config.rust.in | ||
configure.ac | ||
CONTRIBUTING | ||
Doxyfile.in | ||
INSTALL | ||
LICENSE | ||
Makefile.am | ||
Makefile.nmake | ||
README | ||
ReleaseNotes | ||
warning_flags.in |
Tor protects your privacy on the internet by hiding the connection between your Internet address and the services you use. We believe Tor is reasonably secure, but please ensure you read the instructions and configure it properly. To build Tor from source: ./configure && make && make install To build Tor from a just-cloned git repository: sh autogen.sh && ./configure && make && make install Home page: https://www.torproject.org/ Download new versions: https://www.torproject.org/download/download.html Documentation, including links to installation and setup instructions: https://www.torproject.org/docs/documentation.html Making applications work with Tor: https://wiki.torproject.org/projects/tor/wiki/doc/TorifyHOWTO Frequently Asked Questions: https://www.torproject.org/docs/faq.html To get started working on Tor development: See the doc/HACKING directory. Release timeline: https://trac.torproject.org/projects/tor/wiki/org/teams/NetworkTeam/CoreTorReleases