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eb66b33867
I did this a long time ago with a janky python script, but now clang-format has built-in support for this. I fed clang-format every line with a #include and let it re-sort things according to the precise LLVM rules for include ordering baked into clang-format these days. I've reverted a number of files where the results of sorting includes isn't healthy. Either places where we have legacy code relying on particular include ordering (where possible, I'll fix these separately) or where we have particular formatting around #include lines that I didn't want to disturb in this patch. This patch is *entirely* mechanical. If you get merge conflicts or anything, just ignore the changes in this patch and run clang-format over your #include lines in the files. Sorry for any noise here, but it is important to keep these things stable. I was seeing an increasing number of patches with irrelevant re-ordering of #include lines because clang-format was used. This patch at least isolates that churn, makes it easy to skip when resolving conflicts, and gets us to a clean baseline (again). llvm-svn: 304787
282 lines
9.4 KiB
C++
282 lines
9.4 KiB
C++
//======- SHA1.h - Private copy of the SHA1 implementation ---*- C++ -* ======//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This code is taken from public domain
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// (http://oauth.googlecode.com/svn/code/c/liboauth/src/sha1.c and
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// http://cvsweb.netbsd.org/bsdweb.cgi/src/common/lib/libc/hash/sha1/sha1.c?rev=1.6)
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// and modified by wrapping it in a C++ interface for LLVM,
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// and removing unnecessary code.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/Support/SHA1.h"
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#include "llvm/ADT/ArrayRef.h"
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#include "llvm/Support/Host.h"
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using namespace llvm;
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#include <stdint.h>
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#include <string.h>
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#if defined(BYTE_ORDER) && defined(BIG_ENDIAN) && BYTE_ORDER == BIG_ENDIAN
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#define SHA_BIG_ENDIAN
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#endif
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static uint32_t rol(uint32_t Number, int Bits) {
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return (Number << Bits) | (Number >> (32 - Bits));
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}
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static uint32_t blk0(uint32_t *Buf, int I) { return Buf[I]; }
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static uint32_t blk(uint32_t *Buf, int I) {
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Buf[I & 15] = rol(Buf[(I + 13) & 15] ^ Buf[(I + 8) & 15] ^ Buf[(I + 2) & 15] ^
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Buf[I & 15],
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1);
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return Buf[I & 15];
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}
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static void r0(uint32_t &A, uint32_t &B, uint32_t &C, uint32_t &D, uint32_t &E,
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int I, uint32_t *Buf) {
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E += ((B & (C ^ D)) ^ D) + blk0(Buf, I) + 0x5A827999 + rol(A, 5);
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B = rol(B, 30);
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}
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static void r1(uint32_t &A, uint32_t &B, uint32_t &C, uint32_t &D, uint32_t &E,
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int I, uint32_t *Buf) {
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E += ((B & (C ^ D)) ^ D) + blk(Buf, I) + 0x5A827999 + rol(A, 5);
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B = rol(B, 30);
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}
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static void r2(uint32_t &A, uint32_t &B, uint32_t &C, uint32_t &D, uint32_t &E,
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int I, uint32_t *Buf) {
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E += (B ^ C ^ D) + blk(Buf, I) + 0x6ED9EBA1 + rol(A, 5);
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B = rol(B, 30);
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}
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static void r3(uint32_t &A, uint32_t &B, uint32_t &C, uint32_t &D, uint32_t &E,
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int I, uint32_t *Buf) {
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E += (((B | C) & D) | (B & C)) + blk(Buf, I) + 0x8F1BBCDC + rol(A, 5);
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B = rol(B, 30);
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}
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static void r4(uint32_t &A, uint32_t &B, uint32_t &C, uint32_t &D, uint32_t &E,
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int I, uint32_t *Buf) {
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E += (B ^ C ^ D) + blk(Buf, I) + 0xCA62C1D6 + rol(A, 5);
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B = rol(B, 30);
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}
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/* code */
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#define SHA1_K0 0x5a827999
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#define SHA1_K20 0x6ed9eba1
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#define SHA1_K40 0x8f1bbcdc
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#define SHA1_K60 0xca62c1d6
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#define SEED_0 0x67452301
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#define SEED_1 0xefcdab89
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#define SEED_2 0x98badcfe
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#define SEED_3 0x10325476
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#define SEED_4 0xc3d2e1f0
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void SHA1::init() {
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InternalState.State[0] = SEED_0;
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InternalState.State[1] = SEED_1;
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InternalState.State[2] = SEED_2;
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InternalState.State[3] = SEED_3;
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InternalState.State[4] = SEED_4;
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InternalState.ByteCount = 0;
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InternalState.BufferOffset = 0;
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}
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void SHA1::hashBlock() {
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uint32_t A = InternalState.State[0];
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uint32_t B = InternalState.State[1];
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uint32_t C = InternalState.State[2];
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uint32_t D = InternalState.State[3];
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uint32_t E = InternalState.State[4];
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// 4 rounds of 20 operations each. Loop unrolled.
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r0(A, B, C, D, E, 0, InternalState.Buffer.L);
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r0(E, A, B, C, D, 1, InternalState.Buffer.L);
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r0(D, E, A, B, C, 2, InternalState.Buffer.L);
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r0(C, D, E, A, B, 3, InternalState.Buffer.L);
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r0(B, C, D, E, A, 4, InternalState.Buffer.L);
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r0(A, B, C, D, E, 5, InternalState.Buffer.L);
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r0(E, A, B, C, D, 6, InternalState.Buffer.L);
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r0(D, E, A, B, C, 7, InternalState.Buffer.L);
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r0(C, D, E, A, B, 8, InternalState.Buffer.L);
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r0(B, C, D, E, A, 9, InternalState.Buffer.L);
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r0(A, B, C, D, E, 10, InternalState.Buffer.L);
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r0(E, A, B, C, D, 11, InternalState.Buffer.L);
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r0(D, E, A, B, C, 12, InternalState.Buffer.L);
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r0(C, D, E, A, B, 13, InternalState.Buffer.L);
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r0(B, C, D, E, A, 14, InternalState.Buffer.L);
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r0(A, B, C, D, E, 15, InternalState.Buffer.L);
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r1(E, A, B, C, D, 16, InternalState.Buffer.L);
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r1(D, E, A, B, C, 17, InternalState.Buffer.L);
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r1(C, D, E, A, B, 18, InternalState.Buffer.L);
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r1(B, C, D, E, A, 19, InternalState.Buffer.L);
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r2(A, B, C, D, E, 20, InternalState.Buffer.L);
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r2(E, A, B, C, D, 21, InternalState.Buffer.L);
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r2(D, E, A, B, C, 22, InternalState.Buffer.L);
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r2(C, D, E, A, B, 23, InternalState.Buffer.L);
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r2(B, C, D, E, A, 24, InternalState.Buffer.L);
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r2(A, B, C, D, E, 25, InternalState.Buffer.L);
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r2(E, A, B, C, D, 26, InternalState.Buffer.L);
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r2(D, E, A, B, C, 27, InternalState.Buffer.L);
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r2(C, D, E, A, B, 28, InternalState.Buffer.L);
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r2(B, C, D, E, A, 29, InternalState.Buffer.L);
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r2(A, B, C, D, E, 30, InternalState.Buffer.L);
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r2(E, A, B, C, D, 31, InternalState.Buffer.L);
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r2(D, E, A, B, C, 32, InternalState.Buffer.L);
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r2(C, D, E, A, B, 33, InternalState.Buffer.L);
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r2(B, C, D, E, A, 34, InternalState.Buffer.L);
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r2(A, B, C, D, E, 35, InternalState.Buffer.L);
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r2(E, A, B, C, D, 36, InternalState.Buffer.L);
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r2(D, E, A, B, C, 37, InternalState.Buffer.L);
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r2(C, D, E, A, B, 38, InternalState.Buffer.L);
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r2(B, C, D, E, A, 39, InternalState.Buffer.L);
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r3(A, B, C, D, E, 40, InternalState.Buffer.L);
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r3(E, A, B, C, D, 41, InternalState.Buffer.L);
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r3(D, E, A, B, C, 42, InternalState.Buffer.L);
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r3(C, D, E, A, B, 43, InternalState.Buffer.L);
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r3(B, C, D, E, A, 44, InternalState.Buffer.L);
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r3(A, B, C, D, E, 45, InternalState.Buffer.L);
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r3(E, A, B, C, D, 46, InternalState.Buffer.L);
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r3(D, E, A, B, C, 47, InternalState.Buffer.L);
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r3(C, D, E, A, B, 48, InternalState.Buffer.L);
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r3(B, C, D, E, A, 49, InternalState.Buffer.L);
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r3(A, B, C, D, E, 50, InternalState.Buffer.L);
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r3(E, A, B, C, D, 51, InternalState.Buffer.L);
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r3(D, E, A, B, C, 52, InternalState.Buffer.L);
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r3(C, D, E, A, B, 53, InternalState.Buffer.L);
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r3(B, C, D, E, A, 54, InternalState.Buffer.L);
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r3(A, B, C, D, E, 55, InternalState.Buffer.L);
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r3(E, A, B, C, D, 56, InternalState.Buffer.L);
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r3(D, E, A, B, C, 57, InternalState.Buffer.L);
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r3(C, D, E, A, B, 58, InternalState.Buffer.L);
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r3(B, C, D, E, A, 59, InternalState.Buffer.L);
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r4(A, B, C, D, E, 60, InternalState.Buffer.L);
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r4(E, A, B, C, D, 61, InternalState.Buffer.L);
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r4(D, E, A, B, C, 62, InternalState.Buffer.L);
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r4(C, D, E, A, B, 63, InternalState.Buffer.L);
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r4(B, C, D, E, A, 64, InternalState.Buffer.L);
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r4(A, B, C, D, E, 65, InternalState.Buffer.L);
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r4(E, A, B, C, D, 66, InternalState.Buffer.L);
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r4(D, E, A, B, C, 67, InternalState.Buffer.L);
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r4(C, D, E, A, B, 68, InternalState.Buffer.L);
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r4(B, C, D, E, A, 69, InternalState.Buffer.L);
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r4(A, B, C, D, E, 70, InternalState.Buffer.L);
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r4(E, A, B, C, D, 71, InternalState.Buffer.L);
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r4(D, E, A, B, C, 72, InternalState.Buffer.L);
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r4(C, D, E, A, B, 73, InternalState.Buffer.L);
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r4(B, C, D, E, A, 74, InternalState.Buffer.L);
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r4(A, B, C, D, E, 75, InternalState.Buffer.L);
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r4(E, A, B, C, D, 76, InternalState.Buffer.L);
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r4(D, E, A, B, C, 77, InternalState.Buffer.L);
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r4(C, D, E, A, B, 78, InternalState.Buffer.L);
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r4(B, C, D, E, A, 79, InternalState.Buffer.L);
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InternalState.State[0] += A;
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InternalState.State[1] += B;
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InternalState.State[2] += C;
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InternalState.State[3] += D;
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InternalState.State[4] += E;
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}
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void SHA1::addUncounted(uint8_t Data) {
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#ifdef SHA_BIG_ENDIAN
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InternalState.Buffer.C[InternalState.BufferOffset] = Data;
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#else
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InternalState.Buffer.C[InternalState.BufferOffset ^ 3] = Data;
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#endif
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InternalState.BufferOffset++;
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if (InternalState.BufferOffset == BLOCK_LENGTH) {
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hashBlock();
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InternalState.BufferOffset = 0;
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}
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}
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void SHA1::writebyte(uint8_t Data) {
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++InternalState.ByteCount;
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addUncounted(Data);
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}
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void SHA1::update(ArrayRef<uint8_t> Data) {
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for (auto &C : Data)
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writebyte(C);
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}
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void SHA1::pad() {
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// Implement SHA-1 padding (fips180-2 5.1.1)
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// Pad with 0x80 followed by 0x00 until the end of the block
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addUncounted(0x80);
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while (InternalState.BufferOffset != 56)
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addUncounted(0x00);
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// Append length in the last 8 bytes
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addUncounted(0); // We're only using 32 bit lengths
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addUncounted(0); // But SHA-1 supports 64 bit lengths
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addUncounted(0); // So zero pad the top bits
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addUncounted(InternalState.ByteCount >> 29); // Shifting to multiply by 8
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addUncounted(InternalState.ByteCount >>
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21); // as SHA-1 supports bitstreams as well as
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addUncounted(InternalState.ByteCount >> 13); // byte.
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addUncounted(InternalState.ByteCount >> 5);
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addUncounted(InternalState.ByteCount << 3);
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}
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StringRef SHA1::final() {
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// Pad to complete the last block
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pad();
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#ifdef SHA_BIG_ENDIAN
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// Just copy the current state
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for (int i = 0; i < 5; i++) {
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HashResult[i] = InternalState.State[i];
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}
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#else
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// Swap byte order back
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for (int i = 0; i < 5; i++) {
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HashResult[i] = (((InternalState.State[i]) << 24) & 0xff000000) |
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(((InternalState.State[i]) << 8) & 0x00ff0000) |
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(((InternalState.State[i]) >> 8) & 0x0000ff00) |
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(((InternalState.State[i]) >> 24) & 0x000000ff);
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}
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#endif
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// Return pointer to hash (20 characters)
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return StringRef((char *)HashResult, HASH_LENGTH);
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}
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StringRef SHA1::result() {
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auto StateToRestore = InternalState;
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auto Hash = final();
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// Restore the state
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InternalState = StateToRestore;
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// Return pointer to hash (20 characters)
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return Hash;
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}
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std::array<uint8_t, 20> SHA1::hash(ArrayRef<uint8_t> Data) {
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SHA1 Hash;
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Hash.update(Data);
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StringRef S = Hash.final();
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std::array<uint8_t, 20> Arr;
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memcpy(Arr.data(), S.data(), S.size());
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return Arr;
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}
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