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Diffstat (limited to '')
| -rw-r--r-- | src/ringct/rctCryptoOps.c | 221 |
1 files changed, 221 insertions, 0 deletions
diff --git a/src/ringct/rctCryptoOps.c b/src/ringct/rctCryptoOps.c new file mode 100644 index 000000000..9bb9a6891 --- /dev/null +++ b/src/ringct/rctCryptoOps.c @@ -0,0 +1,221 @@ +// Copyright (c) 2014-2016, The Monero Project +// +// All rights reserved. +// +// Redistribution and use in source and binary forms, with or without modification, are +// permitted provided that the following conditions are met: +// +// 1. Redistributions of source code must retain the above copyright notice, this list of +// conditions and the following disclaimer. +// +// 2. Redistributions in binary form must reproduce the above copyright notice, this list +// of conditions and the following disclaimer in the documentation and/or other +// materials provided with the distribution. +// +// 3. Neither the name of the copyright holder nor the names of its contributors may be +// used to endorse or promote products derived from this software without specific +// prior written permission. +// +// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY +// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF +// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL +// THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, +// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS +// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, +// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF +// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. +// +// Parts of this file are originally copyright (c) 2012-2013 The Cryptonote developers + +#include <assert.h> +#include <stdint.h> + +#include "crypto/crypto-ops.h" + +//DISABLE_VS_WARNINGS(4146 4244) + +void sc_reduce32copy(unsigned char * scopy, const unsigned char *s) { + int64_t s0 = 2097151 & load_3(s); + int64_t s1 = 2097151 & (load_4(s + 2) >> 5); + int64_t s2 = 2097151 & (load_3(s + 5) >> 2); + int64_t s3 = 2097151 & (load_4(s + 7) >> 7); + int64_t s4 = 2097151 & (load_4(s + 10) >> 4); + int64_t s5 = 2097151 & (load_3(s + 13) >> 1); + int64_t s6 = 2097151 & (load_4(s + 15) >> 6); + int64_t s7 = 2097151 & (load_3(s + 18) >> 3); + int64_t s8 = 2097151 & load_3(s + 21); + int64_t s9 = 2097151 & (load_4(s + 23) >> 5); + int64_t s10 = 2097151 & (load_3(s + 26) >> 2); + int64_t s11 = (load_4(s + 28) >> 7); + int64_t s12 = 0; + int64_t carry0; + int64_t carry1; + int64_t carry2; + int64_t carry3; + int64_t carry4; + int64_t carry5; + int64_t carry6; + int64_t carry7; + int64_t carry8; + int64_t carry9; + int64_t carry10; + int64_t carry11; + + carry0 = (s0 + (1<<20)) >> 21; + s1 += carry0; + s0 -= carry0 << 21; + carry2 = (s2 + (1<<20)) >> 21; + s3 += carry2; + s2 -= carry2 << 21; + carry4 = (s4 + (1<<20)) >> 21; + s5 += carry4; + s4 -= carry4 << 21; + carry6 = (s6 + (1<<20)) >> 21; + s7 += carry6; + s6 -= carry6 << 21; + carry8 = (s8 + (1<<20)) >> 21; + s9 += carry8; + s8 -= carry8 << 21; + carry10 = (s10 + (1<<20)) >> 21; + s11 += carry10; + s10 -= carry10 << 21; + + carry1 = (s1 + (1<<20)) >> 21; + s2 += carry1; + s1 -= carry1 << 21; + carry3 = (s3 + (1<<20)) >> 21; + s4 += carry3; + s3 -= carry3 << 21; + carry5 = (s5 + (1<<20)) >> 21; + s6 += carry5; + s5 -= carry5 << 21; + carry7 = (s7 + (1<<20)) >> 21; + s8 += carry7; + s7 -= carry7 << 21; + carry9 = (s9 + (1<<20)) >> 21; + s10 += carry9; + s9 -= carry9 << 21; + carry11 = (s11 + (1<<20)) >> 21; + s12 += carry11; + s11 -= carry11 << 21; + + s0 += s12 * 666643; + s1 += s12 * 470296; + s2 += s12 * 654183; + s3 -= s12 * 997805; + s4 += s12 * 136657; + s5 -= s12 * 683901; + s12 = 0; + + carry0 = s0 >> 21; + s1 += carry0; + s0 -= carry0 << 21; + carry1 = s1 >> 21; + s2 += carry1; + s1 -= carry1 << 21; + carry2 = s2 >> 21; + s3 += carry2; + s2 -= carry2 << 21; + carry3 = s3 >> 21; + s4 += carry3; + s3 -= carry3 << 21; + carry4 = s4 >> 21; + s5 += carry4; + s4 -= carry4 << 21; + carry5 = s5 >> 21; + s6 += carry5; + s5 -= carry5 << 21; + carry6 = s6 >> 21; + s7 += carry6; + s6 -= carry6 << 21; + carry7 = s7 >> 21; + s8 += carry7; + s7 -= carry7 << 21; + carry8 = s8 >> 21; + s9 += carry8; + s8 -= carry8 << 21; + carry9 = s9 >> 21; + s10 += carry9; + s9 -= carry9 << 21; + carry10 = s10 >> 21; + s11 += carry10; + s10 -= carry10 << 21; + carry11 = s11 >> 21; + s12 += carry11; + s11 -= carry11 << 21; + + s0 += s12 * 666643; + s1 += s12 * 470296; + s2 += s12 * 654183; + s3 -= s12 * 997805; + s4 += s12 * 136657; + s5 -= s12 * 683901; + + carry0 = s0 >> 21; + s1 += carry0; + s0 -= carry0 << 21; + carry1 = s1 >> 21; + s2 += carry1; + s1 -= carry1 << 21; + carry2 = s2 >> 21; + s3 += carry2; + s2 -= carry2 << 21; + carry3 = s3 >> 21; + s4 += carry3; + s3 -= carry3 << 21; + carry4 = s4 >> 21; + s5 += carry4; + s4 -= carry4 << 21; + carry5 = s5 >> 21; + s6 += carry5; + s5 -= carry5 << 21; + carry6 = s6 >> 21; + s7 += carry6; + s6 -= carry6 << 21; + carry7 = s7 >> 21; + s8 += carry7; + s7 -= carry7 << 21; + carry8 = s8 >> 21; + s9 += carry8; + s8 -= carry8 << 21; + carry9 = s9 >> 21; + s10 += carry9; + s9 -= carry9 << 21; + carry10 = s10 >> 21; + s11 += carry10; + s10 -= carry10 << 21; + + scopy[0] = s0 >> 0; + scopy[1] = s0 >> 8; + scopy[2] = (s0 >> 16) | (s1 << 5); + scopy[3] = s1 >> 3; + scopy[4] = s1 >> 11; + scopy[5] = (s1 >> 19) | (s2 << 2); + scopy[6] = s2 >> 6; + scopy[7] = (s2 >> 14) | (s3 << 7); + scopy[8] = s3 >> 1; + scopy[9] = s3 >> 9; + scopy[10] = (s3 >> 17) | (s4 << 4); + scopy[11] = s4 >> 4; + scopy[12] = s4 >> 12; + scopy[13] = (s4 >> 20) | (s5 << 1); + scopy[14] = s5 >> 7; + scopy[15] = (s5 >> 15) | (s6 << 6); + scopy[16] = s6 >> 2; + scopy[17] = s6 >> 10; + scopy[18] = (s6 >> 18) | (s7 << 3); + scopy[19] = s7 >> 5; + scopy[20] = s7 >> 13; + scopy[21] = s8 >> 0; + scopy[22] = s8 >> 8; + scopy[23] = (s8 >> 16) | (s9 << 5); + scopy[24] = s9 >> 3; + scopy[25] = s9 >> 11; + scopy[26] = (s9 >> 19) | (s10 << 2); + scopy[27] = s10 >> 6; + scopy[28] = (s10 >> 14) | (s11 << 7); + scopy[29] = s11 >> 1; + scopy[30] = s11 >> 9; + scopy[31] = s11 >> 17; +} |