/* * Copyright (C) 2006-2009 Vincent Hanquez * * 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. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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. */ #include #include "sha1.h" #include "bitfn.h" void sha1_init(struct sha1_ctx *ctx) { memset(ctx, 0, sizeof(*ctx)); ctx->h[0] = 0x67452301; ctx->h[1] = 0xefcdab89; ctx->h[2] = 0x98badcfe; ctx->h[3] = 0x10325476; ctx->h[4] = 0xc3d2e1f0; } #define f1(x, y, z) (z ^ (x & (y ^ z))) #define f2(x, y, z) (x ^ y ^ z) #define f3(x, y, z) ((x & y) + (z & (x ^ y))) #define f4(x, y, z) f2(x, y, z) #define K1 0x5a827999 #define K2 0x6ed9eba1 #define K3 0x8f1bbcdc #define K4 0xca62c1d6 #define R(a, b, c, d, e, f, k, w) \ e += rol32(a, 5) + f(b, c, d) + k + w; b = rol32(b, 30) #define M(i) (w[i & 0x0f] = rol32(w[i & 0x0f] ^ w[(i - 14) & 0x0f] \ ^ w[(i - 8) & 0x0f] ^ w[(i - 3) & 0x0f], 1)) static inline void sha1_do_chunk(struct sha1_ctx *ctx, uint32_t *buf) { uint32_t a, b, c, d, e; uint32_t w[16]; #define CPY(i) w[i] = be32_to_cpu(buf[i]) CPY(0); CPY(1); CPY(2); CPY(3); CPY(4); CPY(5); CPY(6); CPY(7); CPY(8); CPY(9); CPY(10); CPY(11); CPY(12); CPY(13); CPY(14); CPY(15); #undef CPY a = ctx->h[0]; b = ctx->h[1]; c = ctx->h[2]; d = ctx->h[3]; e = ctx->h[4]; R(a, b, c, d, e, f1, K1, w[0]); R(e, a, b, c, d, f1, K1, w[1]); R(d, e, a, b, c, f1, K1, w[2]); R(c, d, e, a, b, f1, K1, w[3]); R(b, c, d, e, a, f1, K1, w[4]); R(a, b, c, d, e, f1, K1, w[5]); R(e, a, b, c, d, f1, K1, w[6]); R(d, e, a, b, c, f1, K1, w[7]); R(c, d, e, a, b, f1, K1, w[8]); R(b, c, d, e, a, f1, K1, w[9]); R(a, b, c, d, e, f1, K1, w[10]); R(e, a, b, c, d, f1, K1, w[11]); R(d, e, a, b, c, f1, K1, w[12]); R(c, d, e, a, b, f1, K1, w[13]); R(b, c, d, e, a, f1, K1, w[14]); R(a, b, c, d, e, f1, K1, w[15]); R(e, a, b, c, d, f1, K1, M(16)); R(d, e, a, b, c, f1, K1, M(17)); R(c, d, e, a, b, f1, K1, M(18)); R(b, c, d, e, a, f1, K1, M(19)); R(a, b, c, d, e, f2, K2, M(20)); R(e, a, b, c, d, f2, K2, M(21)); R(d, e, a, b, c, f2, K2, M(22)); R(c, d, e, a, b, f2, K2, M(23)); R(b, c, d, e, a, f2, K2, M(24)); R(a, b, c, d, e, f2, K2, M(25)); R(e, a, b, c, d, f2, K2, M(26)); R(d, e, a, b, c, f2, K2, M(27)); R(c, d, e, a, b, f2, K2, M(28)); R(b, c, d, e, a, f2, K2, M(29)); R(a, b, c, d, e, f2, K2, M(30)); R(e, a, b, c, d, f2, K2, M(31)); R(d, e, a, b, c, f2, K2, M(32)); R(c, d, e, a, b, f2, K2, M(33)); R(b, c, d, e, a, f2, K2, M(34)); R(a, b, c, d, e, f2, K2, M(35)); R(e, a, b, c, d, f2, K2, M(36)); R(d, e, a, b, c, f2, K2, M(37)); R(c, d, e, a, b, f2, K2, M(38)); R(b, c, d, e, a, f2, K2, M(39)); R(a, b, c, d, e, f3, K3, M(40)); R(e, a, b, c, d, f3, K3, M(41)); R(d, e, a, b, c, f3, K3, M(42)); R(c, d, e, a, b, f3, K3, M(43)); R(b, c, d, e, a, f3, K3, M(44)); R(a, b, c, d, e, f3, K3, M(45)); R(e, a, b, c, d, f3, K3, M(46)); R(d, e, a, b, c, f3, K3, M(47)); R(c, d, e, a, b, f3, K3, M(48)); R(b, c, d, e, a, f3, K3, M(49)); R(a, b, c, d, e, f3, K3, M(50)); R(e, a, b, c, d, f3, K3, M(51)); R(d, e, a, b, c, f3, K3, M(52)); R(c, d, e, a, b, f3, K3, M(53)); R(b, c, d, e, a, f3, K3, M(54)); R(a, b, c, d, e, f3, K3, M(55)); R(e, a, b, c, d, f3, K3, M(56)); R(d, e, a, b, c, f3, K3, M(57)); R(c, d, e, a, b, f3, K3, M(58)); R(b, c, d, e, a, f3, K3, M(59)); R(a, b, c, d, e, f4, K4, M(60)); R(e, a, b, c, d, f4, K4, M(61)); R(d, e, a, b, c, f4, K4, M(62)); R(c, d, e, a, b, f4, K4, M(63)); R(b, c, d, e, a, f4, K4, M(64)); R(a, b, c, d, e, f4, K4, M(65)); R(e, a, b, c, d, f4, K4, M(66)); R(d, e, a, b, c, f4, K4, M(67)); R(c, d, e, a, b, f4, K4, M(68)); R(b, c, d, e, a, f4, K4, M(69)); R(a, b, c, d, e, f4, K4, M(70)); R(e, a, b, c, d, f4, K4, M(71)); R(d, e, a, b, c, f4, K4, M(72)); R(c, d, e, a, b, f4, K4, M(73)); R(b, c, d, e, a, f4, K4, M(74)); R(a, b, c, d, e, f4, K4, M(75)); R(e, a, b, c, d, f4, K4, M(76)); R(d, e, a, b, c, f4, K4, M(77)); R(c, d, e, a, b, f4, K4, M(78)); R(b, c, d, e, a, f4, K4, M(79)); ctx->h[0] += a; ctx->h[1] += b; ctx->h[2] += c; ctx->h[3] += d; ctx->h[4] += e; } void sha1_update(struct sha1_ctx *ctx, uint8_t *data, uint32_t len) { uint32_t index, to_fill; index = (uint32_t) (ctx->sz & 0x3f); to_fill = 64 - index; ctx->sz += len; /* process partial buffer if there's enough data to make a block */ if (index && len >= to_fill) { memcpy(ctx->buf + index, data, to_fill); sha1_do_chunk(ctx, (uint32_t *) ctx->buf); len -= to_fill; data += to_fill; index = 0; } /* process as much 64-block as possible */ for (; len >= 64; len -= 64, data += 64) sha1_do_chunk(ctx, (uint32_t *) data); /* append data into buf */ if (len) memcpy(ctx->buf + index, data, len); } void sha1_finalize(struct sha1_ctx *ctx, uint8_t *out) { static uint8_t padding[64] = { 0x80, }; uint64_t bits; uint32_t index, padlen; uint32_t *p = (uint32_t *) out; /* add padding and update data with it */ bits = cpu_to_be64(ctx->sz << 3); /* pad out to 56 */ index = (uint32_t) (ctx->sz & 0x3f); padlen = (index < 56) ? (56 - index) : ((64 + 56) - index); sha1_update(ctx, padding, padlen); /* append length */ sha1_update(ctx, (uint8_t *) &bits, sizeof(bits)); /* output hash */ p[0] = cpu_to_be32(ctx->h[0]); p[1] = cpu_to_be32(ctx->h[1]); p[2] = cpu_to_be32(ctx->h[2]); p[3] = cpu_to_be32(ctx->h[3]); p[4] = cpu_to_be32(ctx->h[4]); }