From 25de5e761daab8b897a4f09ff8503e6f43c299f9 Mon Sep 17 00:00:00 2001 From: Uros Majstorovic Date: Wed, 3 May 2017 21:10:08 +0200 Subject: initial commit --- code/crypto/poly1305/Makefile | 14 ++ code/crypto/poly1305/poly1305-donna.c | 321 ++++++++++++++++++++++++++++++++++ code/crypto/poly1305/poly1305.c | 38 ++++ 3 files changed, 373 insertions(+) create mode 100644 code/crypto/poly1305/Makefile create mode 100644 code/crypto/poly1305/poly1305-donna.c create mode 100644 code/crypto/poly1305/poly1305.c (limited to 'code/crypto/poly1305') diff --git a/code/crypto/poly1305/Makefile b/code/crypto/poly1305/Makefile new file mode 100644 index 0000000..6ddec33 --- /dev/null +++ b/code/crypto/poly1305/Makefile @@ -0,0 +1,14 @@ +CFLAGS=-I../include -D__BEGIN_HIDDEN_DECLS= -D__END_HIDDEN_DECLS= -O3 $(PIC) +obj = poly1305.o + +all: libpoly1305.a +dep: all + +%.o: %.c + $(CC) $(CFLAGS) -c $< + +libpoly1305.a: $(obj) + $(AR) rcs $@ $(obj) + +clean: + rm -f *.o *.a diff --git a/code/crypto/poly1305/poly1305-donna.c b/code/crypto/poly1305/poly1305-donna.c new file mode 100644 index 0000000..773ea4e --- /dev/null +++ b/code/crypto/poly1305/poly1305-donna.c @@ -0,0 +1,321 @@ +/* $OpenBSD: poly1305-donna.c,v 1.3 2014/06/12 15:49:30 deraadt Exp $ */ +/* + * Public Domain poly1305 from Andrew Moon + * Based on poly1305-donna.c, poly1305-donna-32.h and poly1305-donna.h from: + * https://github.com/floodyberry/poly1305-donna + */ + +#include + +static inline void poly1305_init(poly1305_context *ctx, + const unsigned char key[32]); +static inline void poly1305_update(poly1305_context *ctx, + const unsigned char *m, size_t bytes); +static inline void poly1305_finish(poly1305_context *ctx, + unsigned char mac[16]); + +/* + * poly1305 implementation using 32 bit * 32 bit = 64 bit multiplication + * and 64 bit addition. + */ + +#define poly1305_block_size 16 + +/* 17 + sizeof(size_t) + 14*sizeof(unsigned long) */ +typedef struct poly1305_state_internal_t { + unsigned long r[5]; + unsigned long h[5]; + unsigned long pad[4]; + size_t leftover; + unsigned char buffer[poly1305_block_size]; + unsigned char final; +} poly1305_state_internal_t; + +/* interpret four 8 bit unsigned integers as a 32 bit unsigned integer in little endian */ +static unsigned long +U8TO32(const unsigned char *p) +{ + return (((unsigned long)(p[0] & 0xff)) | + ((unsigned long)(p[1] & 0xff) << 8) | + ((unsigned long)(p[2] & 0xff) << 16) | + ((unsigned long)(p[3] & 0xff) << 24)); +} + +/* store a 32 bit unsigned integer as four 8 bit unsigned integers in little endian */ +static void +U32TO8(unsigned char *p, unsigned long v) +{ + p[0] = (v) & 0xff; + p[1] = (v >> 8) & 0xff; + p[2] = (v >> 16) & 0xff; + p[3] = (v >> 24) & 0xff; +} + +static inline void +poly1305_init(poly1305_context *ctx, const unsigned char key[32]) +{ + poly1305_state_internal_t *st = (poly1305_state_internal_t *)ctx; + + /* r &= 0xffffffc0ffffffc0ffffffc0fffffff */ + st->r[0] = (U8TO32(&key[0])) & 0x3ffffff; + st->r[1] = (U8TO32(&key[3]) >> 2) & 0x3ffff03; + st->r[2] = (U8TO32(&key[6]) >> 4) & 0x3ffc0ff; + st->r[3] = (U8TO32(&key[9]) >> 6) & 0x3f03fff; + st->r[4] = (U8TO32(&key[12]) >> 8) & 0x00fffff; + + /* h = 0 */ + st->h[0] = 0; + st->h[1] = 0; + st->h[2] = 0; + st->h[3] = 0; + st->h[4] = 0; + + /* save pad for later */ + st->pad[0] = U8TO32(&key[16]); + st->pad[1] = U8TO32(&key[20]); + st->pad[2] = U8TO32(&key[24]); + st->pad[3] = U8TO32(&key[28]); + + st->leftover = 0; + st->final = 0; +} + +static void +poly1305_blocks(poly1305_state_internal_t *st, const unsigned char *m, size_t bytes) +{ + const unsigned long hibit = (st->final) ? 0 : (1 << 24); /* 1 << 128 */ + unsigned long r0, r1, r2, r3, r4; + unsigned long s1, s2, s3, s4; + unsigned long h0, h1, h2, h3, h4; + unsigned long long d0, d1, d2, d3, d4; + unsigned long c; + + r0 = st->r[0]; + r1 = st->r[1]; + r2 = st->r[2]; + r3 = st->r[3]; + r4 = st->r[4]; + + s1 = r1 * 5; + s2 = r2 * 5; + s3 = r3 * 5; + s4 = r4 * 5; + + h0 = st->h[0]; + h1 = st->h[1]; + h2 = st->h[2]; + h3 = st->h[3]; + h4 = st->h[4]; + + while (bytes >= poly1305_block_size) { + /* h += m[i] */ + h0 += (U8TO32(m + 0)) & 0x3ffffff; + h1 += (U8TO32(m + 3) >> 2) & 0x3ffffff; + h2 += (U8TO32(m + 6) >> 4) & 0x3ffffff; + h3 += (U8TO32(m + 9) >> 6) & 0x3ffffff; + h4 += (U8TO32(m + 12) >> 8) | hibit; + + /* h *= r */ + d0 = ((unsigned long long)h0 * r0) + + ((unsigned long long)h1 * s4) + + ((unsigned long long)h2 * s3) + + ((unsigned long long)h3 * s2) + + ((unsigned long long)h4 * s1); + d1 = ((unsigned long long)h0 * r1) + + ((unsigned long long)h1 * r0) + + ((unsigned long long)h2 * s4) + + ((unsigned long long)h3 * s3) + + ((unsigned long long)h4 * s2); + d2 = ((unsigned long long)h0 * r2) + + ((unsigned long long)h1 * r1) + + ((unsigned long long)h2 * r0) + + ((unsigned long long)h3 * s4) + + ((unsigned long long)h4 * s3); + d3 = ((unsigned long long)h0 * r3) + + ((unsigned long long)h1 * r2) + + ((unsigned long long)h2 * r1) + + ((unsigned long long)h3 * r0) + + ((unsigned long long)h4 * s4); + d4 = ((unsigned long long)h0 * r4) + + ((unsigned long long)h1 * r3) + + ((unsigned long long)h2 * r2) + + ((unsigned long long)h3 * r1) + + ((unsigned long long)h4 * r0); + + /* (partial) h %= p */ + c = (unsigned long)(d0 >> 26); + h0 = (unsigned long)d0 & 0x3ffffff; + d1 += c; + c = (unsigned long)(d1 >> 26); + h1 = (unsigned long)d1 & 0x3ffffff; + d2 += c; + c = (unsigned long)(d2 >> 26); + h2 = (unsigned long)d2 & 0x3ffffff; + d3 += c; + c = (unsigned long)(d3 >> 26); + h3 = (unsigned long)d3 & 0x3ffffff; + d4 += c; + c = (unsigned long)(d4 >> 26); + h4 = (unsigned long)d4 & 0x3ffffff; + h0 += c * 5; + c = (h0 >> 26); + h0 = h0 & 0x3ffffff; + h1 += c; + + m += poly1305_block_size; + bytes -= poly1305_block_size; + } + + st->h[0] = h0; + st->h[1] = h1; + st->h[2] = h2; + st->h[3] = h3; + st->h[4] = h4; +} + +static inline void +poly1305_update(poly1305_context *ctx, const unsigned char *m, size_t bytes) +{ + poly1305_state_internal_t *st = (poly1305_state_internal_t *)ctx; + size_t i; + + /* handle leftover */ + if (st->leftover) { + size_t want = (poly1305_block_size - st->leftover); + if (want > bytes) + want = bytes; + for (i = 0; i < want; i++) + st->buffer[st->leftover + i] = m[i]; + bytes -= want; + m += want; + st->leftover += want; + if (st->leftover < poly1305_block_size) + return; + poly1305_blocks(st, st->buffer, poly1305_block_size); + st->leftover = 0; + } + + /* process full blocks */ + if (bytes >= poly1305_block_size) { + size_t want = (bytes & ~(poly1305_block_size - 1)); + poly1305_blocks(st, m, want); + m += want; + bytes -= want; + } + + /* store leftover */ + if (bytes) { + for (i = 0; i < bytes; i++) + st->buffer[st->leftover + i] = m[i]; + st->leftover += bytes; + } +} + +static inline void +poly1305_finish(poly1305_context *ctx, unsigned char mac[16]) +{ + poly1305_state_internal_t *st = (poly1305_state_internal_t *)ctx; + unsigned long h0, h1, h2, h3, h4, c; + unsigned long g0, g1, g2, g3, g4; + unsigned long long f; + unsigned long mask; + + /* process the remaining block */ + if (st->leftover) { + size_t i = st->leftover; + st->buffer[i++] = 1; + for (; i < poly1305_block_size; i++) + st->buffer[i] = 0; + st->final = 1; + poly1305_blocks(st, st->buffer, poly1305_block_size); + } + + /* fully carry h */ + h0 = st->h[0]; + h1 = st->h[1]; + h2 = st->h[2]; + h3 = st->h[3]; + h4 = st->h[4]; + + c = h1 >> 26; + h1 = h1 & 0x3ffffff; + h2 += c; + c = h2 >> 26; + h2 = h2 & 0x3ffffff; + h3 += c; + c = h3 >> 26; + h3 = h3 & 0x3ffffff; + h4 += c; + c = h4 >> 26; + h4 = h4 & 0x3ffffff; + h0 += c * 5; + c = h0 >> 26; + h0 = h0 & 0x3ffffff; + h1 += c; + + /* compute h + -p */ + g0 = h0 + 5; + c = g0 >> 26; + g0 &= 0x3ffffff; + g1 = h1 + c; + c = g1 >> 26; + g1 &= 0x3ffffff; + g2 = h2 + c; + c = g2 >> 26; + g2 &= 0x3ffffff; + g3 = h3 + c; + c = g3 >> 26; + g3 &= 0x3ffffff; + g4 = h4 + c - (1 << 26); + + /* select h if h < p, or h + -p if h >= p */ + mask = (g4 >> ((sizeof(unsigned long) * 8) - 1)) - 1; + g0 &= mask; + g1 &= mask; + g2 &= mask; + g3 &= mask; + g4 &= mask; + mask = ~mask; + h0 = (h0 & mask) | g0; + h1 = (h1 & mask) | g1; + h2 = (h2 & mask) | g2; + h3 = (h3 & mask) | g3; + h4 = (h4 & mask) | g4; + + /* h = h % (2^128) */ + h0 = ((h0) | (h1 << 26)) & 0xffffffff; + h1 = ((h1 >> 6) | (h2 << 20)) & 0xffffffff; + h2 = ((h2 >> 12) | (h3 << 14)) & 0xffffffff; + h3 = ((h3 >> 18) | (h4 << 8)) & 0xffffffff; + + /* mac = (h + pad) % (2^128) */ + f = (unsigned long long)h0 + st->pad[0]; + h0 = (unsigned long)f; + f = (unsigned long long)h1 + st->pad[1] + (f >> 32); + h1 = (unsigned long)f; + f = (unsigned long long)h2 + st->pad[2] + (f >> 32); + h2 = (unsigned long)f; + f = (unsigned long long)h3 + st->pad[3] + (f >> 32); + h3 = (unsigned long)f; + + U32TO8(mac + 0, h0); + U32TO8(mac + 4, h1); + U32TO8(mac + 8, h2); + U32TO8(mac + 12, h3); + + /* zero out the state */ + st->h[0] = 0; + st->h[1] = 0; + st->h[2] = 0; + st->h[3] = 0; + st->h[4] = 0; + st->r[0] = 0; + st->r[1] = 0; + st->r[2] = 0; + st->r[3] = 0; + st->r[4] = 0; + st->pad[0] = 0; + st->pad[1] = 0; + st->pad[2] = 0; + st->pad[3] = 0; +} diff --git a/code/crypto/poly1305/poly1305.c b/code/crypto/poly1305/poly1305.c new file mode 100644 index 0000000..5f3f111 --- /dev/null +++ b/code/crypto/poly1305/poly1305.c @@ -0,0 +1,38 @@ +/* $OpenBSD: poly1305.c,v 1.3 2014/06/12 15:49:30 deraadt Exp $ */ +/* + * Copyright (c) 2014 Joel Sing + * + * Permission to use, copy, modify, and distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ + +#include +#include "poly1305-donna.c" + +void +CRYPTO_poly1305_init(poly1305_context *ctx, const unsigned char key[32]) +{ + poly1305_init(ctx, key); +} + +void +CRYPTO_poly1305_update(poly1305_context *ctx, const unsigned char *in, + size_t len) +{ + poly1305_update(ctx, in, len); +} + +void +CRYPTO_poly1305_finish(poly1305_context *ctx, unsigned char mac[16]) +{ + poly1305_finish(ctx, mac); +} -- cgit v1.2.3