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Raw import of Marek Majkowski's cisphash.c
siphash is a hash function designed for producing hard-to-predict 64-bit outputs from short inputs and a 128-bit key. It's chosen for security and speed. See https://131002.net/siphash/ for more information on siphash. Source: https://github.com/majek/csiphash/
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@ -100,6 +100,29 @@ src/ext/tor_queue.h is licensed under the following license:
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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===============================================================================
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src/ext/csiphash.c is licensed under the following license:
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Copyright (c) 2013 Marek Majkowski <marek@popcount.org>
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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===============================================================================
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src/config/geoip is licensed under the following license:
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115
src/ext/csiphash.c
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115
src/ext/csiphash.c
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@ -0,0 +1,115 @@
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/* <MIT License>
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Copyright (c) 2013 Marek Majkowski <marek@popcount.org>
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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</MIT License>
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Original location:
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https://github.com/majek/csiphash/
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Solution inspired by code from:
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Samuel Neves (supercop/crypto_auth/siphash24/little)
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djb (supercop/crypto_auth/siphash24/little2)
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Jean-Philippe Aumasson (https://131002.net/siphash/siphash24.c)
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*/
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#include <stdint.h>
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#if defined(__BYTE_ORDER__) && defined(__ORDER_LITTLE_ENDIAN__) && \
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__BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
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# define _le64toh(x) ((uint64_t)(x))
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#elif defined(_WIN32)
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/* Windows is always little endian, unless you're on xbox360
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http://msdn.microsoft.com/en-us/library/b0084kay(v=vs.80).aspx */
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# define _le64toh(x) ((uint64_t)(x))
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#elif defined(__APPLE__)
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# include <libkern/OSByteOrder.h>
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# define _le64toh(x) OSSwapLittleToHostInt64(x)
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#else
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/* See: http://sourceforge.net/p/predef/wiki/Endianness/ */
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# if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__)
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# include <sys/endian.h>
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# else
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# include <endian.h>
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# endif
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# if defined(__BYTE_ORDER) && defined(__LITTLE_ENDIAN) && \
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__BYTE_ORDER == __LITTLE_ENDIAN
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# define _le64toh(x) ((uint64_t)(x))
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# else
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# define _le64toh(x) le64toh(x)
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# endif
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#endif
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#define ROTATE(x, b) (uint64_t)( ((x) << (b)) | ( (x) >> (64 - (b))) )
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#define HALF_ROUND(a,b,c,d,s,t) \
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a += b; c += d; \
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b = ROTATE(b, s) ^ a; \
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d = ROTATE(d, t) ^ c; \
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a = ROTATE(a, 32);
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#define DOUBLE_ROUND(v0,v1,v2,v3) \
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HALF_ROUND(v0,v1,v2,v3,13,16); \
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HALF_ROUND(v2,v1,v0,v3,17,21); \
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HALF_ROUND(v0,v1,v2,v3,13,16); \
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HALF_ROUND(v2,v1,v0,v3,17,21);
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uint64_t siphash24(const void *src, unsigned long src_sz, const char key[16]) {
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const uint64_t *_key = (uint64_t *)key;
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uint64_t k0 = _le64toh(_key[0]);
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uint64_t k1 = _le64toh(_key[1]);
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uint64_t b = (uint64_t)src_sz << 56;
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const uint64_t *in = (uint64_t*)src;
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uint64_t v0 = k0 ^ 0x736f6d6570736575ULL;
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uint64_t v1 = k1 ^ 0x646f72616e646f6dULL;
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uint64_t v2 = k0 ^ 0x6c7967656e657261ULL;
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uint64_t v3 = k1 ^ 0x7465646279746573ULL;
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while (src_sz >= 8) {
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uint64_t mi = _le64toh(*in);
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in += 1; src_sz -= 8;
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v3 ^= mi;
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DOUBLE_ROUND(v0,v1,v2,v3);
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v0 ^= mi;
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}
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uint64_t t = 0; uint8_t *pt = (uint8_t *)&t; uint8_t *m = (uint8_t *)in;
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switch (src_sz) {
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case 7: pt[6] = m[6];
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case 6: pt[5] = m[5];
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case 5: pt[4] = m[4];
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case 4: *((uint32_t*)&pt[0]) = *((uint32_t*)&m[0]); break;
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case 3: pt[2] = m[2];
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case 2: pt[1] = m[1];
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case 1: pt[0] = m[0];
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}
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b |= _le64toh(t);
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v3 ^= b;
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DOUBLE_ROUND(v0,v1,v2,v3);
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v0 ^= b; v2 ^= 0xff;
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DOUBLE_ROUND(v0,v1,v2,v3);
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DOUBLE_ROUND(v0,v1,v2,v3);
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return (v0 ^ v1) ^ (v2 ^ v3);
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}
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