cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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upcase.c (3190B)

      1// SPDX-License-Identifier: GPL-2.0-or-later
      2/*
      3 * upcase.c - Generate the full NTFS Unicode upcase table in little endian.
      4 *	      Part of the Linux-NTFS project.
      5 *
      6 * Copyright (c) 2001 Richard Russon <ntfs@flatcap.org>
      7 * Copyright (c) 2001-2006 Anton Altaparmakov
      8 */
      9
     10#include "malloc.h"
     11#include "ntfs.h"
     12
     13ntfschar *generate_default_upcase(void)
     14{
     15	static const int uc_run_table[][3] = { /* Start, End, Add */
     16	{0x0061, 0x007B,  -32}, {0x0451, 0x045D, -80}, {0x1F70, 0x1F72,  74},
     17	{0x00E0, 0x00F7,  -32}, {0x045E, 0x0460, -80}, {0x1F72, 0x1F76,  86},
     18	{0x00F8, 0x00FF,  -32}, {0x0561, 0x0587, -48}, {0x1F76, 0x1F78, 100},
     19	{0x0256, 0x0258, -205}, {0x1F00, 0x1F08,   8}, {0x1F78, 0x1F7A, 128},
     20	{0x028A, 0x028C, -217}, {0x1F10, 0x1F16,   8}, {0x1F7A, 0x1F7C, 112},
     21	{0x03AC, 0x03AD,  -38}, {0x1F20, 0x1F28,   8}, {0x1F7C, 0x1F7E, 126},
     22	{0x03AD, 0x03B0,  -37}, {0x1F30, 0x1F38,   8}, {0x1FB0, 0x1FB2,   8},
     23	{0x03B1, 0x03C2,  -32}, {0x1F40, 0x1F46,   8}, {0x1FD0, 0x1FD2,   8},
     24	{0x03C2, 0x03C3,  -31}, {0x1F51, 0x1F52,   8}, {0x1FE0, 0x1FE2,   8},
     25	{0x03C3, 0x03CC,  -32}, {0x1F53, 0x1F54,   8}, {0x1FE5, 0x1FE6,   7},
     26	{0x03CC, 0x03CD,  -64}, {0x1F55, 0x1F56,   8}, {0x2170, 0x2180, -16},
     27	{0x03CD, 0x03CF,  -63}, {0x1F57, 0x1F58,   8}, {0x24D0, 0x24EA, -26},
     28	{0x0430, 0x0450,  -32}, {0x1F60, 0x1F68,   8}, {0xFF41, 0xFF5B, -32},
     29	{0}
     30	};
     31
     32	static const int uc_dup_table[][2] = { /* Start, End */
     33	{0x0100, 0x012F}, {0x01A0, 0x01A6}, {0x03E2, 0x03EF}, {0x04CB, 0x04CC},
     34	{0x0132, 0x0137}, {0x01B3, 0x01B7}, {0x0460, 0x0481}, {0x04D0, 0x04EB},
     35	{0x0139, 0x0149}, {0x01CD, 0x01DD}, {0x0490, 0x04BF}, {0x04EE, 0x04F5},
     36	{0x014A, 0x0178}, {0x01DE, 0x01EF}, {0x04BF, 0x04BF}, {0x04F8, 0x04F9},
     37	{0x0179, 0x017E}, {0x01F4, 0x01F5}, {0x04C1, 0x04C4}, {0x1E00, 0x1E95},
     38	{0x018B, 0x018B}, {0x01FA, 0x0218}, {0x04C7, 0x04C8}, {0x1EA0, 0x1EF9},
     39	{0}
     40	};
     41
     42	static const int uc_word_table[][2] = { /* Offset, Value */
     43	{0x00FF, 0x0178}, {0x01AD, 0x01AC}, {0x01F3, 0x01F1}, {0x0269, 0x0196},
     44	{0x0183, 0x0182}, {0x01B0, 0x01AF}, {0x0253, 0x0181}, {0x026F, 0x019C},
     45	{0x0185, 0x0184}, {0x01B9, 0x01B8}, {0x0254, 0x0186}, {0x0272, 0x019D},
     46	{0x0188, 0x0187}, {0x01BD, 0x01BC}, {0x0259, 0x018F}, {0x0275, 0x019F},
     47	{0x018C, 0x018B}, {0x01C6, 0x01C4}, {0x025B, 0x0190}, {0x0283, 0x01A9},
     48	{0x0192, 0x0191}, {0x01C9, 0x01C7}, {0x0260, 0x0193}, {0x0288, 0x01AE},
     49	{0x0199, 0x0198}, {0x01CC, 0x01CA}, {0x0263, 0x0194}, {0x0292, 0x01B7},
     50	{0x01A8, 0x01A7}, {0x01DD, 0x018E}, {0x0268, 0x0197},
     51	{0}
     52	};
     53
     54	int i, r;
     55	ntfschar *uc;
     56
     57	uc = ntfs_malloc_nofs(default_upcase_len * sizeof(ntfschar));
     58	if (!uc)
     59		return uc;
     60	memset(uc, 0, default_upcase_len * sizeof(ntfschar));
     61	/* Generate the little endian Unicode upcase table used by ntfs. */
     62	for (i = 0; i < default_upcase_len; i++)
     63		uc[i] = cpu_to_le16(i);
     64	for (r = 0; uc_run_table[r][0]; r++)
     65		for (i = uc_run_table[r][0]; i < uc_run_table[r][1]; i++)
     66			le16_add_cpu(&uc[i], uc_run_table[r][2]);
     67	for (r = 0; uc_dup_table[r][0]; r++)
     68		for (i = uc_dup_table[r][0]; i < uc_dup_table[r][1]; i += 2)
     69			le16_add_cpu(&uc[i + 1], -1);
     70	for (r = 0; uc_word_table[r][0]; r++)
     71		uc[uc_word_table[r][0]] = cpu_to_le16(uc_word_table[r][1]);
     72	return uc;
     73}