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1 <?php 2 3 if (class_exists('ParagonIE_Sodium_Core32_ChaCha20', false)) { 4 return; 5 } 6 7 /** 8 * Class ParagonIE_Sodium_Core32_ChaCha20 9 */ 10 class ParagonIE_Sodium_Core32_ChaCha20 extends ParagonIE_Sodium_Core32_Util 11 { 12 /** 13 * The ChaCha20 quarter round function. Works on four 32-bit integers. 14 * 15 * @internal You should not use this directly from another application 16 * 17 * @param ParagonIE_Sodium_Core32_Int32 $a 18 * @param ParagonIE_Sodium_Core32_Int32 $b 19 * @param ParagonIE_Sodium_Core32_Int32 $c 20 * @param ParagonIE_Sodium_Core32_Int32 $d 21 * @return array<int, ParagonIE_Sodium_Core32_Int32> 22 * @throws SodiumException 23 * @throws TypeError 24 */ 25 protected static function quarterRound( 26 ParagonIE_Sodium_Core32_Int32 $a, 27 ParagonIE_Sodium_Core32_Int32 $b, 28 ParagonIE_Sodium_Core32_Int32 $c, 29 ParagonIE_Sodium_Core32_Int32 $d 30 ) { 31 /** @var ParagonIE_Sodium_Core32_Int32 $a */ 32 /** @var ParagonIE_Sodium_Core32_Int32 $b */ 33 /** @var ParagonIE_Sodium_Core32_Int32 $c */ 34 /** @var ParagonIE_Sodium_Core32_Int32 $d */ 35 36 # a = PLUS(a,b); d = ROTATE(XOR(d,a),16); 37 $a = $a->addInt32($b); 38 $d = $d->xorInt32($a)->rotateLeft(16); 39 40 # c = PLUS(c,d); b = ROTATE(XOR(b,c),12); 41 $c = $c->addInt32($d); 42 $b = $b->xorInt32($c)->rotateLeft(12); 43 44 # a = PLUS(a,b); d = ROTATE(XOR(d,a), 8); 45 $a = $a->addInt32($b); 46 $d = $d->xorInt32($a)->rotateLeft(8); 47 48 # c = PLUS(c,d); b = ROTATE(XOR(b,c), 7); 49 $c = $c->addInt32($d); 50 $b = $b->xorInt32($c)->rotateLeft(7); 51 52 return array($a, $b, $c, $d); 53 } 54 55 /** 56 * @internal You should not use this directly from another application 57 * 58 * @param ParagonIE_Sodium_Core32_ChaCha20_Ctx $ctx 59 * @param string $message 60 * 61 * @return string 62 * @throws SodiumException 63 * @throws TypeError 64 */ 65 public static function encryptBytes( 66 ParagonIE_Sodium_Core32_ChaCha20_Ctx $ctx, 67 $message = '' 68 ) { 69 $bytes = self::strlen($message); 70 71 /** @var ParagonIE_Sodium_Core32_Int32 $x0 */ 72 /** @var ParagonIE_Sodium_Core32_Int32 $x1 */ 73 /** @var ParagonIE_Sodium_Core32_Int32 $x2 */ 74 /** @var ParagonIE_Sodium_Core32_Int32 $x3 */ 75 /** @var ParagonIE_Sodium_Core32_Int32 $x4 */ 76 /** @var ParagonIE_Sodium_Core32_Int32 $x5 */ 77 /** @var ParagonIE_Sodium_Core32_Int32 $x6 */ 78 /** @var ParagonIE_Sodium_Core32_Int32 $x7 */ 79 /** @var ParagonIE_Sodium_Core32_Int32 $x8 */ 80 /** @var ParagonIE_Sodium_Core32_Int32 $x9 */ 81 /** @var ParagonIE_Sodium_Core32_Int32 $x10 */ 82 /** @var ParagonIE_Sodium_Core32_Int32 $x11 */ 83 /** @var ParagonIE_Sodium_Core32_Int32 $x12 */ 84 /** @var ParagonIE_Sodium_Core32_Int32 $x13 */ 85 /** @var ParagonIE_Sodium_Core32_Int32 $x14 */ 86 /** @var ParagonIE_Sodium_Core32_Int32 $x15 */ 87 88 /* 89 j0 = ctx->input[0]; 90 j1 = ctx->input[1]; 91 j2 = ctx->input[2]; 92 j3 = ctx->input[3]; 93 j4 = ctx->input[4]; 94 j5 = ctx->input[5]; 95 j6 = ctx->input[6]; 96 j7 = ctx->input[7]; 97 j8 = ctx->input[8]; 98 j9 = ctx->input[9]; 99 j10 = ctx->input[10]; 100 j11 = ctx->input[11]; 101 j12 = ctx->input[12]; 102 j13 = ctx->input[13]; 103 j14 = ctx->input[14]; 104 j15 = ctx->input[15]; 105 */ 106 /** @var ParagonIE_Sodium_Core32_Int32 $j0 */ 107 $j0 = $ctx[0]; 108 /** @var ParagonIE_Sodium_Core32_Int32 $j1 */ 109 $j1 = $ctx[1]; 110 /** @var ParagonIE_Sodium_Core32_Int32 $j2 */ 111 $j2 = $ctx[2]; 112 /** @var ParagonIE_Sodium_Core32_Int32 $j3 */ 113 $j3 = $ctx[3]; 114 /** @var ParagonIE_Sodium_Core32_Int32 $j4 */ 115 $j4 = $ctx[4]; 116 /** @var ParagonIE_Sodium_Core32_Int32 $j5 */ 117 $j5 = $ctx[5]; 118 /** @var ParagonIE_Sodium_Core32_Int32 $j6 */ 119 $j6 = $ctx[6]; 120 /** @var ParagonIE_Sodium_Core32_Int32 $j7 */ 121 $j7 = $ctx[7]; 122 /** @var ParagonIE_Sodium_Core32_Int32 $j8 */ 123 $j8 = $ctx[8]; 124 /** @var ParagonIE_Sodium_Core32_Int32 $j9 */ 125 $j9 = $ctx[9]; 126 /** @var ParagonIE_Sodium_Core32_Int32 $j10 */ 127 $j10 = $ctx[10]; 128 /** @var ParagonIE_Sodium_Core32_Int32 $j11 */ 129 $j11 = $ctx[11]; 130 /** @var ParagonIE_Sodium_Core32_Int32 $j12 */ 131 $j12 = $ctx[12]; 132 /** @var ParagonIE_Sodium_Core32_Int32 $j13 */ 133 $j13 = $ctx[13]; 134 /** @var ParagonIE_Sodium_Core32_Int32 $j14 */ 135 $j14 = $ctx[14]; 136 /** @var ParagonIE_Sodium_Core32_Int32 $j15 */ 137 $j15 = $ctx[15]; 138 139 $c = ''; 140 for (;;) { 141 if ($bytes < 64) { 142 $message .= str_repeat("\x00", 64 - $bytes); 143 } 144 145 $x0 = clone $j0; 146 $x1 = clone $j1; 147 $x2 = clone $j2; 148 $x3 = clone $j3; 149 $x4 = clone $j4; 150 $x5 = clone $j5; 151 $x6 = clone $j6; 152 $x7 = clone $j7; 153 $x8 = clone $j8; 154 $x9 = clone $j9; 155 $x10 = clone $j10; 156 $x11 = clone $j11; 157 $x12 = clone $j12; 158 $x13 = clone $j13; 159 $x14 = clone $j14; 160 $x15 = clone $j15; 161 162 # for (i = 20; i > 0; i -= 2) { 163 for ($i = 20; $i > 0; $i -= 2) { 164 # QUARTERROUND( x0, x4, x8, x12) 165 list($x0, $x4, $x8, $x12) = self::quarterRound($x0, $x4, $x8, $x12); 166 167 # QUARTERROUND( x1, x5, x9, x13) 168 list($x1, $x5, $x9, $x13) = self::quarterRound($x1, $x5, $x9, $x13); 169 170 # QUARTERROUND( x2, x6, x10, x14) 171 list($x2, $x6, $x10, $x14) = self::quarterRound($x2, $x6, $x10, $x14); 172 173 # QUARTERROUND( x3, x7, x11, x15) 174 list($x3, $x7, $x11, $x15) = self::quarterRound($x3, $x7, $x11, $x15); 175 176 # QUARTERROUND( x0, x5, x10, x15) 177 list($x0, $x5, $x10, $x15) = self::quarterRound($x0, $x5, $x10, $x15); 178 179 # QUARTERROUND( x1, x6, x11, x12) 180 list($x1, $x6, $x11, $x12) = self::quarterRound($x1, $x6, $x11, $x12); 181 182 # QUARTERROUND( x2, x7, x8, x13) 183 list($x2, $x7, $x8, $x13) = self::quarterRound($x2, $x7, $x8, $x13); 184 185 # QUARTERROUND( x3, x4, x9, x14) 186 list($x3, $x4, $x9, $x14) = self::quarterRound($x3, $x4, $x9, $x14); 187 } 188 /* 189 x0 = PLUS(x0, j0); 190 x1 = PLUS(x1, j1); 191 x2 = PLUS(x2, j2); 192 x3 = PLUS(x3, j3); 193 x4 = PLUS(x4, j4); 194 x5 = PLUS(x5, j5); 195 x6 = PLUS(x6, j6); 196 x7 = PLUS(x7, j7); 197 x8 = PLUS(x8, j8); 198 x9 = PLUS(x9, j9); 199 x10 = PLUS(x10, j10); 200 x11 = PLUS(x11, j11); 201 x12 = PLUS(x12, j12); 202 x13 = PLUS(x13, j13); 203 x14 = PLUS(x14, j14); 204 x15 = PLUS(x15, j15); 205 */ 206 $x0 = $x0->addInt32($j0); 207 $x1 = $x1->addInt32($j1); 208 $x2 = $x2->addInt32($j2); 209 $x3 = $x3->addInt32($j3); 210 $x4 = $x4->addInt32($j4); 211 $x5 = $x5->addInt32($j5); 212 $x6 = $x6->addInt32($j6); 213 $x7 = $x7->addInt32($j7); 214 $x8 = $x8->addInt32($j8); 215 $x9 = $x9->addInt32($j9); 216 $x10 = $x10->addInt32($j10); 217 $x11 = $x11->addInt32($j11); 218 $x12 = $x12->addInt32($j12); 219 $x13 = $x13->addInt32($j13); 220 $x14 = $x14->addInt32($j14); 221 $x15 = $x15->addInt32($j15); 222 223 /* 224 x0 = XOR(x0, LOAD32_LE(m + 0)); 225 x1 = XOR(x1, LOAD32_LE(m + 4)); 226 x2 = XOR(x2, LOAD32_LE(m + 8)); 227 x3 = XOR(x3, LOAD32_LE(m + 12)); 228 x4 = XOR(x4, LOAD32_LE(m + 16)); 229 x5 = XOR(x5, LOAD32_LE(m + 20)); 230 x6 = XOR(x6, LOAD32_LE(m + 24)); 231 x7 = XOR(x7, LOAD32_LE(m + 28)); 232 x8 = XOR(x8, LOAD32_LE(m + 32)); 233 x9 = XOR(x9, LOAD32_LE(m + 36)); 234 x10 = XOR(x10, LOAD32_LE(m + 40)); 235 x11 = XOR(x11, LOAD32_LE(m + 44)); 236 x12 = XOR(x12, LOAD32_LE(m + 48)); 237 x13 = XOR(x13, LOAD32_LE(m + 52)); 238 x14 = XOR(x14, LOAD32_LE(m + 56)); 239 x15 = XOR(x15, LOAD32_LE(m + 60)); 240 */ 241 $x0 = $x0->xorInt32(ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($message, 0, 4))); 242 $x1 = $x1->xorInt32(ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($message, 4, 4))); 243 $x2 = $x2->xorInt32(ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($message, 8, 4))); 244 $x3 = $x3->xorInt32(ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($message, 12, 4))); 245 $x4 = $x4->xorInt32(ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($message, 16, 4))); 246 $x5 = $x5->xorInt32(ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($message, 20, 4))); 247 $x6 = $x6->xorInt32(ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($message, 24, 4))); 248 $x7 = $x7->xorInt32(ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($message, 28, 4))); 249 $x8 = $x8->xorInt32(ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($message, 32, 4))); 250 $x9 = $x9->xorInt32(ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($message, 36, 4))); 251 $x10 = $x10->xorInt32(ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($message, 40, 4))); 252 $x11 = $x11->xorInt32(ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($message, 44, 4))); 253 $x12 = $x12->xorInt32(ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($message, 48, 4))); 254 $x13 = $x13->xorInt32(ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($message, 52, 4))); 255 $x14 = $x14->xorInt32(ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($message, 56, 4))); 256 $x15 = $x15->xorInt32(ParagonIE_Sodium_Core32_Int32::fromReverseString(self::substr($message, 60, 4))); 257 258 /* 259 j12 = PLUSONE(j12); 260 if (!j12) { 261 j13 = PLUSONE(j13); 262 } 263 */ 264 /** @var ParagonIE_Sodium_Core32_Int32 $j12 */ 265 $j12 = $j12->addInt(1); 266 if ($j12->limbs[0] === 0 && $j12->limbs[1] === 0) { 267 $j13 = $j13->addInt(1); 268 } 269 270 /* 271 STORE32_LE(c + 0, x0); 272 STORE32_LE(c + 4, x1); 273 STORE32_LE(c + 8, x2); 274 STORE32_LE(c + 12, x3); 275 STORE32_LE(c + 16, x4); 276 STORE32_LE(c + 20, x5); 277 STORE32_LE(c + 24, x6); 278 STORE32_LE(c + 28, x7); 279 STORE32_LE(c + 32, x8); 280 STORE32_LE(c + 36, x9); 281 STORE32_LE(c + 40, x10); 282 STORE32_LE(c + 44, x11); 283 STORE32_LE(c + 48, x12); 284 STORE32_LE(c + 52, x13); 285 STORE32_LE(c + 56, x14); 286 STORE32_LE(c + 60, x15); 287 */ 288 289 $block = $x0->toReverseString() . 290 $x1->toReverseString() . 291 $x2->toReverseString() . 292 $x3->toReverseString() . 293 $x4->toReverseString() . 294 $x5->toReverseString() . 295 $x6->toReverseString() . 296 $x7->toReverseString() . 297 $x8->toReverseString() . 298 $x9->toReverseString() . 299 $x10->toReverseString() . 300 $x11->toReverseString() . 301 $x12->toReverseString() . 302 $x13->toReverseString() . 303 $x14->toReverseString() . 304 $x15->toReverseString(); 305 306 /* Partial block */ 307 if ($bytes < 64) { 308 $c .= self::substr($block, 0, $bytes); 309 break; 310 } 311 312 /* Full block */ 313 $c .= $block; 314 $bytes -= 64; 315 if ($bytes <= 0) { 316 break; 317 } 318 $message = self::substr($message, 64); 319 } 320 /* end for(;;) loop */ 321 322 $ctx[12] = $j12; 323 $ctx[13] = $j13; 324 return $c; 325 } 326 327 /** 328 * @internal You should not use this directly from another application 329 * 330 * @param int $len 331 * @param string $nonce 332 * @param string $key 333 * @return string 334 * @throws SodiumException 335 * @throws TypeError 336 */ 337 public static function stream($len = 64, $nonce = '', $key = '') 338 { 339 return self::encryptBytes( 340 new ParagonIE_Sodium_Core32_ChaCha20_Ctx($key, $nonce), 341 str_repeat("\x00", $len) 342 ); 343 } 344 345 /** 346 * @internal You should not use this directly from another application 347 * 348 * @param int $len 349 * @param string $nonce 350 * @param string $key 351 * @return string 352 * @throws SodiumException 353 * @throws TypeError 354 */ 355 public static function ietfStream($len, $nonce = '', $key = '') 356 { 357 return self::encryptBytes( 358 new ParagonIE_Sodium_Core32_ChaCha20_IetfCtx($key, $nonce), 359 str_repeat("\x00", $len) 360 ); 361 } 362 363 /** 364 * @internal You should not use this directly from another application 365 * 366 * @param string $message 367 * @param string $nonce 368 * @param string $key 369 * @param string $ic 370 * @return string 371 * @throws SodiumException 372 * @throws TypeError 373 */ 374 public static function ietfStreamXorIc($message, $nonce = '', $key = '', $ic = '') 375 { 376 return self::encryptBytes( 377 new ParagonIE_Sodium_Core32_ChaCha20_IetfCtx($key, $nonce, $ic), 378 $message 379 ); 380 } 381 382 /** 383 * @internal You should not use this directly from another application 384 * 385 * @param string $message 386 * @param string $nonce 387 * @param string $key 388 * @param string $ic 389 * @return string 390 * @throws SodiumException 391 * @throws TypeError 392 */ 393 public static function streamXorIc($message, $nonce = '', $key = '', $ic = '') 394 { 395 return self::encryptBytes( 396 new ParagonIE_Sodium_Core32_ChaCha20_Ctx($key, $nonce, $ic), 397 $message 398 ); 399 } 400 }
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| Generated: Sun Dec 22 01:00:02 2024 | Cross-referenced by PHPXref 0.7.1 |