freebsd with flexible iflib nic queues
6856398eab
hash function) optimized for speed on short messages returning a 64bit hash/ digest value. SipHash is simpler and much faster than other secure MACs and competitive in speed with popular non-cryptographic hash functions. It uses a 128-bit key without the hidden cost of a key expansion step. SipHash iterates a simple round function consisting of four additions, four xors, and six rotations, interleaved with xors of message blocks for a pre-defined number of compression and finalization rounds. The absence of secret load/store addresses or secret branch conditions avoid timing attacks. No state is shared between messages. Hashing is deterministic and doesn't use nonces. It is not susceptible to length extension attacks. Target applications include network traffic authentication, message authentication (MAC) and hash-tables protection against hash-flooding denial-of-service attacks. The number of update/finalization rounds is defined during initialization: SipHash24_Init() for the fast and reasonable strong version. SipHash48_Init() for the strong version (half as fast). SipHash usage is similar to other hash functions: struct SIPHASH_CTX ctx; char *k = "16bytes long key" char *s = "string"; uint64_t h = 0; SipHash24_Init(&ctx); SipHash_SetKey(&ctx, k); SipHash_Update(&ctx, s, strlen(s)); SipHash_Final(&h, &ctx); /* or */ h = SipHash_End(&ctx); /* or */ h = SipHash24(&ctx, k, s, strlen(s)); It was designed by Jean-Philippe Aumasson and Daniel J. Bernstein and is described in the paper "SipHash: a fast short-input PRF", 2012.09.18: https://131002.net/siphash/siphash.pdf Permanent ID: b9a943a805fbfc6fde808af9fc0ecdfa Implemented by: andre (based on the paper) Reviewed by: cperciva |
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| bin | ||
| cddl | ||
| contrib | ||
| crypto | ||
| etc | ||
| games | ||
| gnu | ||
| include | ||
| kerberos5 | ||
| lib | ||
| libexec | ||
| release | ||
| rescue | ||
| sbin | ||
| secure | ||
| share | ||
| sys | ||
| tools | ||
| usr.bin | ||
| usr.sbin | ||
| COPYRIGHT | ||
| LOCKS | ||
| MAINTAINERS | ||
| Makefile | ||
| Makefile.inc1 | ||
| ObsoleteFiles.inc | ||
| README | ||
| UPDATING | ||
This is the top level of the FreeBSD source directory. This file was last revised on: $FreeBSD$ For copyright information, please see the file COPYRIGHT in this directory (additional copyright information also exists for some sources in this tree - please see the specific source directories for more information). The Makefile in this directory supports a number of targets for building components (or all) of the FreeBSD source tree, the most commonly used one being ``world'', which rebuilds and installs everything in the FreeBSD system from the source tree except the kernel, the kernel-modules and the contents of /etc. The ``world'' target should only be used in cases where the source tree has not changed from the currently running version. See: http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/makeworld.html for more information, including setting make(1) variables. The ``buildkernel'' and ``installkernel'' targets build and install the kernel and the modules (see below). Please see the top of the Makefile in this directory for more information on the standard build targets and compile-time flags. Building a kernel is a somewhat more involved process, documentation for which can be found at: http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/kernelconfig.html And in the config(8) man page. Note: If you want to build and install the kernel with the ``buildkernel'' and ``installkernel'' targets, you might need to build world before. More information is available in the handbook. The sample kernel configuration files reside in the sys/<arch>/conf sub-directory (assuming that you've installed the kernel sources), the file named GENERIC being the one used to build your initial installation kernel. The file NOTES contains entries and documentation for all possible devices, not just those commonly used. It is the successor of the ancient LINT file, but in contrast to LINT, it is not buildable as a kernel but a pure reference and documentation file. Source Roadmap: --------------- bin System/user commands. cddl Various commands and libraries under the Common Development and Distribution License. contrib Packages contributed by 3rd parties. crypto Cryptography stuff (see crypto/README). etc Template files for /etc. games Amusements. gnu Various commands and libraries under the GNU Public License. Please see gnu/COPYING* for more information. include System include files. kerberos5 Kerberos5 (Heimdal) package. lib System libraries. libexec System daemons. release Release building Makefile & associated tools. rescue Build system for statically linked /rescue utilities. sbin System commands. secure Cryptographic libraries and commands. share Shared resources. sys Kernel sources. tools Utilities for regression testing and miscellaneous tasks. usr.bin User commands. usr.sbin System administration commands. For information on synchronizing your source tree with one or more of the FreeBSD Project's development branches, please see: http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/synching.html