/*------------------------------------------------------------------------- * * sha1.c * Implements the SHA1 Secure Hash Algorithm * * Fallback implementation of SHA1, as specified in RFC 3174. * * Portions Copyright (c) 1996-2022, PostgreSQL Global Development Group * Portions Copyright (c) 1994, Regents of the University of California * * IDENTIFICATION * src/common/sha1.c * *------------------------------------------------------------------------- */ /* $KAME: sha1.c,v 1.3 2000/02/22 14:01:18 itojun Exp $ */ /* * Copyright (C) 1995, 1996, 1997, and 1998 WIDE 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 project 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 PROJECT 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 PROJECT 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. */ /* * FIPS pub 180-1: Secure Hash Algorithm (SHA-1) * based on: http://www.itl.nist.gov/fipspubs/fip180-1.htm * implemented by Jun-ichiro itojun Itoh */ #ifndef FRONTEND #include "postgres.h" #else #include "postgres_fe.h" #endif #include #include "sha1_int.h" /* constant table */ static uint32 _K[] = {0x5a827999, 0x6ed9eba1, 0x8f1bbcdc, 0xca62c1d6}; #define K(t) _K[(t) / 20] #define F0(b, c, d) (((b) & (c)) | ((~(b)) & (d))) #define F1(b, c, d) (((b) ^ (c)) ^ (d)) #define F2(b, c, d) (((b) & (c)) | ((b) & (d)) | ((c) & (d))) #define F3(b, c, d) (((b) ^ (c)) ^ (d)) #define S(n, x) (((x) << (n)) | ((x) >> (32 - (n)))) #define H(n) (ctx->h.b32[(n)]) #define COUNT (ctx->count) #define BCOUNT (ctx->c.b64[0] / 8) #define W(n) (ctx->m.b32[(n)]) #define PUTPAD(x) \ do { \ ctx->m.b8[(COUNT % 64)] = (x); \ COUNT++; \ COUNT %= 64; \ if (COUNT % 64 == 0) \ sha1_step(ctx); \ } while (0) static void sha1_step(pg_sha1_ctx *ctx) { uint32 a, b, c, d, e; size_t t, s; uint32 tmp; #ifndef WORDS_BIGENDIAN pg_sha1_ctx tctx; memmove(&tctx.m.b8[0], &ctx->m.b8[0], 64); ctx->m.b8[0] = tctx.m.b8[3]; ctx->m.b8[1] = tctx.m.b8[2]; ctx->m.b8[2] = tctx.m.b8[1]; ctx->m.b8[3] = tctx.m.b8[0]; ctx->m.b8[4] = tctx.m.b8[7]; ctx->m.b8[5] = tctx.m.b8[6]; ctx->m.b8[6] = tctx.m.b8[5]; ctx->m.b8[7] = tctx.m.b8[4]; ctx->m.b8[8] = tctx.m.b8[11]; ctx->m.b8[9] = tctx.m.b8[10]; ctx->m.b8[10] = tctx.m.b8[9]; ctx->m.b8[11] = tctx.m.b8[8]; ctx->m.b8[12] = tctx.m.b8[15]; ctx->m.b8[13] = tctx.m.b8[14]; ctx->m.b8[14] = tctx.m.b8[13]; ctx->m.b8[15] = tctx.m.b8[12]; ctx->m.b8[16] = tctx.m.b8[19]; ctx->m.b8[17] = tctx.m.b8[18]; ctx->m.b8[18] = tctx.m.b8[17]; ctx->m.b8[19] = tctx.m.b8[16]; ctx->m.b8[20] = tctx.m.b8[23]; ctx->m.b8[21] = tctx.m.b8[22]; ctx->m.b8[22] = tctx.m.b8[21]; ctx->m.b8[23] = tctx.m.b8[20]; ctx->m.b8[24] = tctx.m.b8[27]; ctx->m.b8[25] = tctx.m.b8[26]; ctx->m.b8[26] = tctx.m.b8[25]; ctx->m.b8[27] = tctx.m.b8[24]; ctx->m.b8[28] = tctx.m.b8[31]; ctx->m.b8[29] = tctx.m.b8[30]; ctx->m.b8[30] = tctx.m.b8[29]; ctx->m.b8[31] = tctx.m.b8[28]; ctx->m.b8[32] = tctx.m.b8[35]; ctx->m.b8[33] = tctx.m.b8[34]; ctx->m.b8[34] = tctx.m.b8[33]; ctx->m.b8[35] = tctx.m.b8[32]; ctx->m.b8[36] = tctx.m.b8[39]; ctx->m.b8[37] = tctx.m.b8[38]; ctx->m.b8[38] = tctx.m.b8[37]; ctx->m.b8[39] = tctx.m.b8[36]; ctx->m.b8[40] = tctx.m.b8[43]; ctx->m.b8[41] = tctx.m.b8[42]; ctx->m.b8[42] = tctx.m.b8[41]; ctx->m.b8[43] = tctx.m.b8[40]; ctx->m.b8[44] = tctx.m.b8[47]; ctx->m.b8[45] = tctx.m.b8[46]; ctx->m.b8[46] = tctx.m.b8[45]; ctx->m.b8[47] = tctx.m.b8[44]; ctx->m.b8[48] = tctx.m.b8[51]; ctx->m.b8[49] = tctx.m.b8[50]; ctx->m.b8[50] = tctx.m.b8[49]; ctx->m.b8[51] = tctx.m.b8[48]; ctx->m.b8[52] = tctx.m.b8[55]; ctx->m.b8[53] = tctx.m.b8[54]; ctx->m.b8[54] = tctx.m.b8[53]; ctx->m.b8[55] = tctx.m.b8[52]; ctx->m.b8[56] = tctx.m.b8[59]; ctx->m.b8[57] = tctx.m.b8[58]; ctx->m.b8[58] = tctx.m.b8[57]; ctx->m.b8[59] = tctx.m.b8[56]; ctx->m.b8[60] = tctx.m.b8[63]; ctx->m.b8[61] = tctx.m.b8[62]; ctx->m.b8[62] = tctx.m.b8[61]; ctx->m.b8[63] = tctx.m.b8[60]; #endif a = H(0); b = H(1); c = H(2); d = H(3); e = H(4); for (t = 0; t < 20; t++) { s = t & 0x0f; if (t >= 16) W(s) = S(1, W((s + 13) & 0x0f) ^ W((s + 8) & 0x0f) ^ W((s + 2) & 0x0f) ^ W(s)); tmp = S(5, a) + F0(b, c, d) + e + W(s) + K(t); e = d; d = c; c = S(30, b); b = a; a = tmp; } for (t = 20; t < 40; t++) { s = t & 0x0f; W(s) = S(1, W((s + 13) & 0x0f) ^ W((s + 8) & 0x0f) ^ W((s + 2) & 0x0f) ^ W(s)); tmp = S(5, a) + F1(b, c, d) + e + W(s) + K(t); e = d; d = c; c = S(30, b); b = a; a = tmp; } for (t = 40; t < 60; t++) { s = t & 0x0f; W(s) = S(1, W((s + 13) & 0x0f) ^ W((s + 8) & 0x0f) ^ W((s + 2) & 0x0f) ^ W(s)); tmp = S(5, a) + F2(b, c, d) + e + W(s) + K(t); e = d; d = c; c = S(30, b); b = a; a = tmp; } for (t = 60; t < 80; t++) { s = t & 0x0f; W(s) = S(1, W((s + 13) & 0x0f) ^ W((s + 8) & 0x0f) ^ W((s + 2) & 0x0f) ^ W(s)); tmp = S(5, a) + F3(b, c, d) + e + W(s) + K(t); e = d; d = c; c = S(30, b); b = a; a = tmp; } H(0) = H(0) + a; H(1) = H(1) + b; H(2) = H(2) + c; H(3) = H(3) + d; H(4) = H(4) + e; memset(&ctx->m.b8[0], 0, 64); } static void sha1_pad(pg_sha1_ctx *ctx) { size_t padlen; /* pad length in bytes */ size_t padstart; PUTPAD(0x80); padstart = COUNT % 64; padlen = 64 - padstart; if (padlen < 8) { memset(&ctx->m.b8[padstart], 0, padlen); COUNT += padlen; COUNT %= 64; sha1_step(ctx); padstart = COUNT % 64; /* should be 0 */ padlen = 64 - padstart; /* should be 64 */ } memset(&ctx->m.b8[padstart], 0, padlen - 8); COUNT += (padlen - 8); COUNT %= 64; #ifdef WORDS_BIGENDIAN PUTPAD(ctx->c.b8[0]); PUTPAD(ctx->c.b8[1]); PUTPAD(ctx->c.b8[2]); PUTPAD(ctx->c.b8[3]); PUTPAD(ctx->c.b8[4]); PUTPAD(ctx->c.b8[5]); PUTPAD(ctx->c.b8[6]); PUTPAD(ctx->c.b8[7]); #else PUTPAD(ctx->c.b8[7]); PUTPAD(ctx->c.b8[6]); PUTPAD(ctx->c.b8[5]); PUTPAD(ctx->c.b8[4]); PUTPAD(ctx->c.b8[3]); PUTPAD(ctx->c.b8[2]); PUTPAD(ctx->c.b8[1]); PUTPAD(ctx->c.b8[0]); #endif } static void sha1_result(uint8 *digest0, pg_sha1_ctx *ctx) { uint8 *digest; digest = (uint8 *) digest0; #ifdef WORDS_BIGENDIAN memmove(digest, &ctx->h.b8[0], 20); #else digest[0] = ctx->h.b8[3]; digest[1] = ctx->h.b8[2]; digest[2] = ctx->h.b8[1]; digest[3] = ctx->h.b8[0]; digest[4] = ctx->h.b8[7]; digest[5] = ctx->h.b8[6]; digest[6] = ctx->h.b8[5]; digest[7] = ctx->h.b8[4]; digest[8] = ctx->h.b8[11]; digest[9] = ctx->h.b8[10]; digest[10] = ctx->h.b8[9]; digest[11] = ctx->h.b8[8]; digest[12] = ctx->h.b8[15]; digest[13] = ctx->h.b8[14]; digest[14] = ctx->h.b8[13]; digest[15] = ctx->h.b8[12]; digest[16] = ctx->h.b8[19]; digest[17] = ctx->h.b8[18]; digest[18] = ctx->h.b8[17]; digest[19] = ctx->h.b8[16]; #endif } /* External routines for this SHA1 implementation */ /* * pg_sha1_init * * Initialize a SHA1 context. */ void pg_sha1_init(pg_sha1_ctx *ctx) { memset(ctx, 0, sizeof(pg_sha1_ctx)); H(0) = 0x67452301; H(1) = 0xefcdab89; H(2) = 0x98badcfe; H(3) = 0x10325476; H(4) = 0xc3d2e1f0; } /* * pg_sha1_update * * Update a SHA1 context. */ void pg_sha1_update(pg_sha1_ctx *ctx, const uint8 *data, size_t len) { const uint8 *input; size_t gaplen; size_t gapstart; size_t off; size_t copysiz; input = (const uint8 *) data; off = 0; while (off < len) { gapstart = COUNT % 64; gaplen = 64 - gapstart; copysiz = (gaplen < len - off) ? gaplen : len - off; memmove(&ctx->m.b8[gapstart], &input[off], copysiz); COUNT += copysiz; COUNT %= 64; ctx->c.b64[0] += copysiz * 8; if (COUNT % 64 == 0) sha1_step(ctx); off += copysiz; } } /* * pg_sha1_final * * Finalize a SHA1 context. */ void pg_sha1_final(pg_sha1_ctx *ctx, uint8 *dest) { sha1_pad(ctx); sha1_result(dest, ctx); }