| 1 | /* -*-c-*- |
| 2 | * |
| 3 | * The Rijndael block cipher |
| 4 | * |
| 5 | * (c) 2000 Straylight/Edgeware |
| 6 | */ |
| 7 | |
| 8 | /*----- Licensing notice --------------------------------------------------* |
| 9 | * |
| 10 | * This file is part of Catacomb. |
| 11 | * |
| 12 | * Catacomb is free software; you can redistribute it and/or modify |
| 13 | * it under the terms of the GNU Library General Public License as |
| 14 | * published by the Free Software Foundation; either version 2 of the |
| 15 | * License, or (at your option) any later version. |
| 16 | * |
| 17 | * Catacomb is distributed in the hope that it will be useful, |
| 18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 20 | * GNU Library General Public License for more details. |
| 21 | * |
| 22 | * You should have received a copy of the GNU Library General Public |
| 23 | * License along with Catacomb; if not, write to the Free |
| 24 | * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, |
| 25 | * MA 02111-1307, USA. |
| 26 | */ |
| 27 | |
| 28 | /*----- Header files ------------------------------------------------------*/ |
| 29 | |
| 30 | #include "config.h" |
| 31 | |
| 32 | #include <assert.h> |
| 33 | #include <stdio.h> |
| 34 | |
| 35 | #include <mLib/bits.h> |
| 36 | |
| 37 | #if defined(TEST_RIG) && defined(ENABLE_ASM_DEBUG) |
| 38 | # include "regdump.h" |
| 39 | # define BLKC_TESTHOOK do { regdump_init(); } while (0) |
| 40 | #endif |
| 41 | |
| 42 | #include "blkc.h" |
| 43 | #include "dispatch.h" |
| 44 | #include "gcipher.h" |
| 45 | #include "rijndael.h" |
| 46 | #include "rijndael-base.h" |
| 47 | |
| 48 | /*----- Main code ---------------------------------------------------------*/ |
| 49 | |
| 50 | /* --- @rijndael_init@ --- * |
| 51 | * |
| 52 | * Arguments: @rijndael_ctx *k@ = pointer to context to initialize |
| 53 | * @const void *buf@ = pointer to buffer of key material |
| 54 | * @size_t sz@ = size of the key material |
| 55 | * |
| 56 | * Returns: --- |
| 57 | * |
| 58 | * Use: Initializes a Rijndael context with a particular key. This |
| 59 | * implementation of Rijndael doesn't impose any particular |
| 60 | * limits on the key size except that it must be multiple of 4 |
| 61 | * bytes long. 256 bits seems sensible, though. |
| 62 | */ |
| 63 | |
| 64 | void rijndael_init(rijndael_ctx *k, const void *buf, size_t sz) |
| 65 | { |
| 66 | rijndael_setup(k, RIJNDAEL_BLKSZ / 4, buf, sz); |
| 67 | } |
| 68 | |
| 69 | /* --- @rijndael_eblk@, @rijndael_dblk@ --- * |
| 70 | * |
| 71 | * Arguments: @const rijndael_ctx *k@ = pointer to Rijndael context |
| 72 | * @const uint32 s[4]@ = pointer to source block |
| 73 | * @uint32 d[4]@ = pointer to destination block |
| 74 | * |
| 75 | * Returns: --- |
| 76 | * |
| 77 | * Use: Low-level block encryption and decryption. |
| 78 | */ |
| 79 | |
| 80 | CPU_DISPATCH(EMPTY, EMPTY, void, rijndael_eblk, |
| 81 | (const rijndael_ctx *k, const uint32 s[4], uint32 d[4]), |
| 82 | (k, s, d), pick_eblk, simple_eblk) |
| 83 | |
| 84 | CPU_DISPATCH(EMPTY, EMPTY, void, rijndael_dblk, |
| 85 | (const rijndael_ctx *k, const uint32 s[4], uint32 d[4]), |
| 86 | (k, s, d), pick_dblk, simple_dblk) |
| 87 | |
| 88 | #if CPUFAM_X86 || CPUFAM_AMD64 |
| 89 | extern rijndael_eblk__functype rijndael_eblk_x86ish_aesni; |
| 90 | extern rijndael_dblk__functype rijndael_dblk_x86ish_aesni; |
| 91 | extern rijndael_eblk__functype rijndael_eblk_x86ish_aesni_avx; |
| 92 | extern rijndael_dblk__functype rijndael_dblk_x86ish_aesni_avx; |
| 93 | #endif |
| 94 | #if CPUFAM_ARMEL && HAVE_AS_ARMV8_CRYPTO |
| 95 | extern rijndael_eblk__functype rijndael_eblk_arm_crypto; |
| 96 | extern rijndael_dblk__functype rijndael_dblk_arm_crypto; |
| 97 | #endif |
| 98 | #if CPUFAM_ARM64 |
| 99 | extern rijndael_eblk__functype rijndael_eblk_arm64_crypto; |
| 100 | extern rijndael_dblk__functype rijndael_dblk_arm64_crypto; |
| 101 | #endif |
| 102 | |
| 103 | static rijndael_eblk__functype *pick_eblk(void) |
| 104 | { |
| 105 | #if CPUFAM_X86 || CPUFAM_AMD64 |
| 106 | DISPATCH_PICK_COND(rijndael_eblk, rijndael_eblk_x86ish_aesni_avx, |
| 107 | cpu_feature_p(CPUFEAT_X86_AVX) && |
| 108 | cpu_feature_p(CPUFEAT_X86_AESNI)); |
| 109 | DISPATCH_PICK_COND(rijndael_eblk, rijndael_eblk_x86ish_aesni, |
| 110 | cpu_feature_p(CPUFEAT_X86_AESNI)); |
| 111 | #endif |
| 112 | #if CPUFAM_ARMEL && HAVE_AS_ARMV8_CRYPTO |
| 113 | DISPATCH_PICK_COND(rijndael_eblk, rijndael_eblk_arm_crypto, |
| 114 | cpu_feature_p(CPUFEAT_ARM_AES)); |
| 115 | #endif |
| 116 | #if CPUFAM_ARM64 |
| 117 | DISPATCH_PICK_COND(rijndael_eblk, rijndael_eblk_arm64_crypto, |
| 118 | cpu_feature_p(CPUFEAT_ARM_AES)); |
| 119 | #endif |
| 120 | DISPATCH_PICK_FALLBACK(rijndael_eblk, simple_eblk); |
| 121 | } |
| 122 | |
| 123 | static rijndael_dblk__functype *pick_dblk(void) |
| 124 | { |
| 125 | #if CPUFAM_X86 || CPUFAM_AMD64 |
| 126 | DISPATCH_PICK_COND(rijndael_dblk, rijndael_dblk_x86ish_aesni_avx, |
| 127 | cpu_feature_p(CPUFEAT_X86_AVX) && |
| 128 | cpu_feature_p(CPUFEAT_X86_AESNI)); |
| 129 | DISPATCH_PICK_COND(rijndael_dblk, rijndael_dblk_x86ish_aesni, |
| 130 | cpu_feature_p(CPUFEAT_X86_AESNI)); |
| 131 | #endif |
| 132 | #if CPUFAM_ARMEL && HAVE_AS_ARMV8_CRYPTO |
| 133 | DISPATCH_PICK_COND(rijndael_dblk, rijndael_dblk_arm_crypto, |
| 134 | cpu_feature_p(CPUFEAT_ARM_AES)); |
| 135 | #endif |
| 136 | #if CPUFAM_ARM64 |
| 137 | DISPATCH_PICK_COND(rijndael_dblk, rijndael_dblk_arm64_crypto, |
| 138 | cpu_feature_p(CPUFEAT_ARM_AES)); |
| 139 | #endif |
| 140 | DISPATCH_PICK_FALLBACK(rijndael_dblk, simple_dblk); |
| 141 | } |
| 142 | |
| 143 | #define DO(what, t, aa, bb, cc, dd, a, b, c, d, w) do { \ |
| 144 | aa = what(t, a, b, c, d) ^ *w++; \ |
| 145 | bb = what(t, b, c, d, a) ^ *w++; \ |
| 146 | cc = what(t, c, d, a, b) ^ *w++; \ |
| 147 | dd = what(t, d, a, b, c) ^ *w++; \ |
| 148 | } while (0) |
| 149 | |
| 150 | #define UNDO(what, t, aa, bb, cc, dd, a, b, c, d, w) do { \ |
| 151 | aa = what(t, a, d, c, b) ^ *w++; \ |
| 152 | bb = what(t, b, a, d, c) ^ *w++; \ |
| 153 | cc = what(t, c, b, a, d) ^ *w++; \ |
| 154 | dd = what(t, d, c, b, a) ^ *w++; \ |
| 155 | } while (0) |
| 156 | |
| 157 | static void simple_eblk(const rijndael_ctx *k, const uint32 *s, uint32 *dst) |
| 158 | { |
| 159 | uint32 a = s[0], b = s[1], c = s[2], d = s[3]; |
| 160 | uint32 aa, bb, cc, dd; |
| 161 | const uint32 *w = k->w; |
| 162 | |
| 163 | a ^= *w++; b ^= *w++; c ^= *w++; d ^= *w++; |
| 164 | aa = a; bb = b; cc = c; dd = d; |
| 165 | |
| 166 | switch (k->nr) { |
| 167 | case 14: |
| 168 | DO(MIX, T, aa, bb, cc, dd, a, b, c, d, w); |
| 169 | case 13: |
| 170 | DO(MIX, T, a, b, c, d, aa, bb, cc, dd, w); |
| 171 | case 12: |
| 172 | DO(MIX, T, aa, bb, cc, dd, a, b, c, d, w); |
| 173 | case 11: |
| 174 | DO(MIX, T, a, b, c, d, aa, bb, cc, dd, w); |
| 175 | case 10: |
| 176 | default: |
| 177 | DO(MIX, T, aa, bb, cc, dd, a, b, c, d, w); |
| 178 | DO(MIX, T, a, b, c, d, aa, bb, cc, dd, w); |
| 179 | DO(MIX, T, aa, bb, cc, dd, a, b, c, d, w); |
| 180 | DO(MIX, T, a, b, c, d, aa, bb, cc, dd, w); |
| 181 | DO(MIX, T, aa, bb, cc, dd, a, b, c, d, w); |
| 182 | DO(MIX, T, a, b, c, d, aa, bb, cc, dd, w); |
| 183 | DO(MIX, T, aa, bb, cc, dd, a, b, c, d, w); |
| 184 | DO(MIX, T, a, b, c, d, aa, bb, cc, dd, w); |
| 185 | DO(MIX, T, aa, bb, cc, dd, a, b, c, d, w); |
| 186 | } |
| 187 | DO(SUB, S, a, b, c, d, aa, bb, cc, dd, w); |
| 188 | |
| 189 | dst[0] = a; dst[1] = b; dst[2] = c; dst[3] = d; |
| 190 | } |
| 191 | |
| 192 | static void simple_dblk(const rijndael_ctx *k, const uint32 *s, uint32 *dst) |
| 193 | { |
| 194 | uint32 a = s[0], b = s[1], c = s[2], d = s[3]; |
| 195 | uint32 aa, bb, cc, dd; |
| 196 | const uint32 *w = k->wi; |
| 197 | |
| 198 | a ^= *w++; b ^= *w++; c ^= *w++; d ^= *w++; |
| 199 | aa = a; bb = b; cc = c; dd = d; |
| 200 | |
| 201 | switch (k->nr) { |
| 202 | case 14: |
| 203 | UNDO(MIX, TI, aa, bb, cc, dd, a, b, c, d, w); |
| 204 | case 13: |
| 205 | UNDO(MIX, TI, a, b, c, d, aa, bb, cc, dd, w); |
| 206 | case 12: |
| 207 | UNDO(MIX, TI, aa, bb, cc, dd, a, b, c, d, w); |
| 208 | case 11: |
| 209 | UNDO(MIX, TI, a, b, c, d, aa, bb, cc, dd, w); |
| 210 | case 10: |
| 211 | default: |
| 212 | UNDO(MIX, TI, aa, bb, cc, dd, a, b, c, d, w); |
| 213 | UNDO(MIX, TI, a, b, c, d, aa, bb, cc, dd, w); |
| 214 | UNDO(MIX, TI, aa, bb, cc, dd, a, b, c, d, w); |
| 215 | UNDO(MIX, TI, a, b, c, d, aa, bb, cc, dd, w); |
| 216 | UNDO(MIX, TI, aa, bb, cc, dd, a, b, c, d, w); |
| 217 | UNDO(MIX, TI, a, b, c, d, aa, bb, cc, dd, w); |
| 218 | UNDO(MIX, TI, aa, bb, cc, dd, a, b, c, d, w); |
| 219 | UNDO(MIX, TI, a, b, c, d, aa, bb, cc, dd, w); |
| 220 | UNDO(MIX, TI, aa, bb, cc, dd, a, b, c, d, w); |
| 221 | } |
| 222 | UNDO(SUB, SI, a, b, c, d, aa, bb, cc, dd, w); |
| 223 | |
| 224 | dst[0] = a; dst[1] = b; dst[2] = c; dst[3] = d; |
| 225 | } |
| 226 | |
| 227 | BLKC_TEST(RIJNDAEL, rijndael) |
| 228 | |
| 229 | /*----- That's all, folks -------------------------------------------------*/ |