| twofish_common.c (58e16d792a6a8c6b750f637a4649967fcac853dc) | twofish_common.c (674f368a952c48ede71784935a799a5205b92b6c) |
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| 1// SPDX-License-Identifier: GPL-2.0-or-later 2/* 3 * Common Twofish algorithm parts shared between the c and assembler 4 * implementations 5 * 6 * Originally Twofish for GPG 7 * By Matthew Skala <mskala@ansuz.sooke.bc.ca>, July 26, 1998 8 * 256-bit key length added March 20, 1999 --- 553 unchanged lines hidden (view full) --- 562 x = CALC_K256_2 (k, l, 0); \ 563 y = CALC_K256_2 (m, n, 4); \ 564 y = rol32(y, 8); \ 565 x += y; y += x; ctx->a[j] = x; \ 566 ctx->a[(j) + 1] = rol32(y, 9) 567 568/* Perform the key setup. */ 569int __twofish_setkey(struct twofish_ctx *ctx, const u8 *key, | 1// SPDX-License-Identifier: GPL-2.0-or-later 2/* 3 * Common Twofish algorithm parts shared between the c and assembler 4 * implementations 5 * 6 * Originally Twofish for GPG 7 * By Matthew Skala <mskala@ansuz.sooke.bc.ca>, July 26, 1998 8 * 256-bit key length added March 20, 1999 --- 553 unchanged lines hidden (view full) --- 562 x = CALC_K256_2 (k, l, 0); \ 563 y = CALC_K256_2 (m, n, 4); \ 564 y = rol32(y, 8); \ 565 x += y; y += x; ctx->a[j] = x; \ 566 ctx->a[(j) + 1] = rol32(y, 9) 567 568/* Perform the key setup. */ 569int __twofish_setkey(struct twofish_ctx *ctx, const u8 *key, |
| 570 unsigned int key_len, u32 *flags) | 570 unsigned int key_len) |
| 571{ 572 int i, j, k; 573 574 /* Temporaries for CALC_K. */ 575 u32 x, y; 576 577 /* The S vector used to key the S-boxes, split up into individual bytes. 578 * 128-bit keys use only sa through sh; 256-bit use all of them. */ 579 u8 sa = 0, sb = 0, sc = 0, sd = 0, se = 0, sf = 0, sg = 0, sh = 0; 580 u8 si = 0, sj = 0, sk = 0, sl = 0, sm = 0, sn = 0, so = 0, sp = 0; 581 582 /* Temporary for CALC_S. */ 583 u8 tmp; 584 585 /* Check key length. */ 586 if (key_len % 8) | 571{ 572 int i, j, k; 573 574 /* Temporaries for CALC_K. */ 575 u32 x, y; 576 577 /* The S vector used to key the S-boxes, split up into individual bytes. 578 * 128-bit keys use only sa through sh; 256-bit use all of them. */ 579 u8 sa = 0, sb = 0, sc = 0, sd = 0, se = 0, sf = 0, sg = 0, sh = 0; 580 u8 si = 0, sj = 0, sk = 0, sl = 0, sm = 0, sn = 0, so = 0, sp = 0; 581 582 /* Temporary for CALC_S. */ 583 u8 tmp; 584 585 /* Check key length. */ 586 if (key_len % 8) |
| 587 { 588 *flags |= CRYPTO_TFM_RES_BAD_KEY_LEN; | |
| 589 return -EINVAL; /* unsupported key length */ | 587 return -EINVAL; /* unsupported key length */ |
| 590 } | |
| 591 592 /* Compute the first two words of the S vector. The magic numbers are 593 * the entries of the RS matrix, preprocessed through poly_to_exp. The 594 * numbers in the comments are the original (polynomial form) matrix 595 * entries. */ 596 CALC_S (sa, sb, sc, sd, 0, 0x00, 0x2D, 0x01, 0x2D); /* 01 A4 02 A4 */ 597 CALC_S (sa, sb, sc, sd, 1, 0x2D, 0xA4, 0x44, 0x8A); /* A4 56 A1 55 */ 598 CALC_S (sa, sb, sc, sd, 2, 0x8A, 0xD5, 0xBF, 0xD1); /* 55 82 FC 87 */ --- 84 unchanged lines hidden (view full) --- 683 } 684 685 return 0; 686} 687EXPORT_SYMBOL_GPL(__twofish_setkey); 688 689int twofish_setkey(struct crypto_tfm *tfm, const u8 *key, unsigned int key_len) 690{ | 588 589 /* Compute the first two words of the S vector. The magic numbers are 590 * the entries of the RS matrix, preprocessed through poly_to_exp. The 591 * numbers in the comments are the original (polynomial form) matrix 592 * entries. */ 593 CALC_S (sa, sb, sc, sd, 0, 0x00, 0x2D, 0x01, 0x2D); /* 01 A4 02 A4 */ 594 CALC_S (sa, sb, sc, sd, 1, 0x2D, 0xA4, 0x44, 0x8A); /* A4 56 A1 55 */ 595 CALC_S (sa, sb, sc, sd, 2, 0x8A, 0xD5, 0xBF, 0xD1); /* 55 82 FC 87 */ --- 84 unchanged lines hidden (view full) --- 680 } 681 682 return 0; 683} 684EXPORT_SYMBOL_GPL(__twofish_setkey); 685 686int twofish_setkey(struct crypto_tfm *tfm, const u8 *key, unsigned int key_len) 687{ |
| 691 return __twofish_setkey(crypto_tfm_ctx(tfm), key, key_len, 692 &tfm->crt_flags); | 688 return __twofish_setkey(crypto_tfm_ctx(tfm), key, key_len); |
| 693} 694EXPORT_SYMBOL_GPL(twofish_setkey); 695 696MODULE_LICENSE("GPL"); 697MODULE_DESCRIPTION("Twofish cipher common functions"); | 689} 690EXPORT_SYMBOL_GPL(twofish_setkey); 691 692MODULE_LICENSE("GPL"); 693MODULE_DESCRIPTION("Twofish cipher common functions"); |