obj-$(CONFIG_CRYPTO_BLOWFISH_COMMON) += blowfish_common.o
obj-$(CONFIG_CRYPTO_TWOFISH) += twofish_generic.o
obj-$(CONFIG_CRYPTO_TWOFISH_COMMON) += twofish_common.o
-
-serpent_generic-y := serpent.o
obj-$(CONFIG_CRYPTO_SERPENT) += serpent_generic.o
obj-$(CONFIG_CRYPTO_AES) += aes_generic.o
obj-$(CONFIG_CRYPTO_CAMELLIA) += camellia.o
+++ /dev/null
-/*
- * Cryptographic API.
- *
- * Serpent Cipher Algorithm.
- *
- * Copyright (C) 2002 Dag Arne Osvik <osvik@ii.uib.no>
- * 2003 Herbert Valerio Riedel <hvr@gnu.org>
- *
- * Added tnepres support:
- * Ruben Jesus Garcia Hernandez <ruben@ugr.es>, 18.10.2004
- * Based on code by hvr
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- */
-
-#include <linux/init.h>
-#include <linux/module.h>
-#include <linux/errno.h>
-#include <asm/byteorder.h>
-#include <linux/crypto.h>
-#include <linux/types.h>
-#include <crypto/serpent.h>
-
-/* Key is padded to the maximum of 256 bits before round key generation.
- * Any key length <= 256 bits (32 bytes) is allowed by the algorithm.
- */
-
-#define PHI 0x9e3779b9UL
-
-#define keyiter(a, b, c, d, i, j) \
- ({ b ^= d; b ^= c; b ^= a; b ^= PHI ^ i; b = rol32(b, 11); k[j] = b; })
-
-#define loadkeys(x0, x1, x2, x3, i) \
- ({ x0 = k[i]; x1 = k[i+1]; x2 = k[i+2]; x3 = k[i+3]; })
-
-#define storekeys(x0, x1, x2, x3, i) \
- ({ k[i] = x0; k[i+1] = x1; k[i+2] = x2; k[i+3] = x3; })
-
-#define store_and_load_keys(x0, x1, x2, x3, s, l) \
- ({ storekeys(x0, x1, x2, x3, s); loadkeys(x0, x1, x2, x3, l); })
-
-#define K(x0, x1, x2, x3, i) ({ \
- x3 ^= k[4*(i)+3]; x2 ^= k[4*(i)+2]; \
- x1 ^= k[4*(i)+1]; x0 ^= k[4*(i)+0]; \
- })
-
-#define LK(x0, x1, x2, x3, x4, i) ({ \
- x0 = rol32(x0, 13);\
- x2 = rol32(x2, 3); x1 ^= x0; x4 = x0 << 3; \
- x3 ^= x2; x1 ^= x2; \
- x1 = rol32(x1, 1); x3 ^= x4; \
- x3 = rol32(x3, 7); x4 = x1; \
- x0 ^= x1; x4 <<= 7; x2 ^= x3; \
- x0 ^= x3; x2 ^= x4; x3 ^= k[4*i+3]; \
- x1 ^= k[4*i+1]; x0 = rol32(x0, 5); x2 = rol32(x2, 22);\
- x0 ^= k[4*i+0]; x2 ^= k[4*i+2]; \
- })
-
-#define KL(x0, x1, x2, x3, x4, i) ({ \
- x0 ^= k[4*i+0]; x1 ^= k[4*i+1]; x2 ^= k[4*i+2]; \
- x3 ^= k[4*i+3]; x0 = ror32(x0, 5); x2 = ror32(x2, 22);\
- x4 = x1; x2 ^= x3; x0 ^= x3; \
- x4 <<= 7; x0 ^= x1; x1 = ror32(x1, 1); \
- x2 ^= x4; x3 = ror32(x3, 7); x4 = x0 << 3; \
- x1 ^= x0; x3 ^= x4; x0 = ror32(x0, 13);\
- x1 ^= x2; x3 ^= x2; x2 = ror32(x2, 3); \
- })
-
-#define S0(x0, x1, x2, x3, x4) ({ \
- x4 = x3; \
- x3 |= x0; x0 ^= x4; x4 ^= x2; \
- x4 = ~x4; x3 ^= x1; x1 &= x0; \
- x1 ^= x4; x2 ^= x0; x0 ^= x3; \
- x4 |= x0; x0 ^= x2; x2 &= x1; \
- x3 ^= x2; x1 = ~x1; x2 ^= x4; \
- x1 ^= x2; \
- })
-
-#define S1(x0, x1, x2, x3, x4) ({ \
- x4 = x1; \
- x1 ^= x0; x0 ^= x3; x3 = ~x3; \
- x4 &= x1; x0 |= x1; x3 ^= x2; \
- x0 ^= x3; x1 ^= x3; x3 ^= x4; \
- x1 |= x4; x4 ^= x2; x2 &= x0; \
- x2 ^= x1; x1 |= x0; x0 = ~x0; \
- x0 ^= x2; x4 ^= x1; \
- })
-
-#define S2(x0, x1, x2, x3, x4) ({ \
- x3 = ~x3; \
- x1 ^= x0; x4 = x0; x0 &= x2; \
- x0 ^= x3; x3 |= x4; x2 ^= x1; \
- x3 ^= x1; x1 &= x0; x0 ^= x2; \
- x2 &= x3; x3 |= x1; x0 = ~x0; \
- x3 ^= x0; x4 ^= x0; x0 ^= x2; \
- x1 |= x2; \
- })
-
-#define S3(x0, x1, x2, x3, x4) ({ \
- x4 = x1; \
- x1 ^= x3; x3 |= x0; x4 &= x0; \
- x0 ^= x2; x2 ^= x1; x1 &= x3; \
- x2 ^= x3; x0 |= x4; x4 ^= x3; \
- x1 ^= x0; x0 &= x3; x3 &= x4; \
- x3 ^= x2; x4 |= x1; x2 &= x1; \
- x4 ^= x3; x0 ^= x3; x3 ^= x2; \
- })
-
-#define S4(x0, x1, x2, x3, x4) ({ \
- x4 = x3; \
- x3 &= x0; x0 ^= x4; \
- x3 ^= x2; x2 |= x4; x0 ^= x1; \
- x4 ^= x3; x2 |= x0; \
- x2 ^= x1; x1 &= x0; \
- x1 ^= x4; x4 &= x2; x2 ^= x3; \
- x4 ^= x0; x3 |= x1; x1 = ~x1; \
- x3 ^= x0; \
- })
-
-#define S5(x0, x1, x2, x3, x4) ({ \
- x4 = x1; x1 |= x0; \
- x2 ^= x1; x3 = ~x3; x4 ^= x0; \
- x0 ^= x2; x1 &= x4; x4 |= x3; \
- x4 ^= x0; x0 &= x3; x1 ^= x3; \
- x3 ^= x2; x0 ^= x1; x2 &= x4; \
- x1 ^= x2; x2 &= x0; \
- x3 ^= x2; \
- })
-
-#define S6(x0, x1, x2, x3, x4) ({ \
- x4 = x1; \
- x3 ^= x0; x1 ^= x2; x2 ^= x0; \
- x0 &= x3; x1 |= x3; x4 = ~x4; \
- x0 ^= x1; x1 ^= x2; \
- x3 ^= x4; x4 ^= x0; x2 &= x0; \
- x4 ^= x1; x2 ^= x3; x3 &= x1; \
- x3 ^= x0; x1 ^= x2; \
- })
-
-#define S7(x0, x1, x2, x3, x4) ({ \
- x1 = ~x1; \
- x4 = x1; x0 = ~x0; x1 &= x2; \
- x1 ^= x3; x3 |= x4; x4 ^= x2; \
- x2 ^= x3; x3 ^= x0; x0 |= x1; \
- x2 &= x0; x0 ^= x4; x4 ^= x3; \
- x3 &= x0; x4 ^= x1; \
- x2 ^= x4; x3 ^= x1; x4 |= x0; \
- x4 ^= x1; \
- })
-
-#define SI0(x0, x1, x2, x3, x4) ({ \
- x4 = x3; x1 ^= x0; \
- x3 |= x1; x4 ^= x1; x0 = ~x0; \
- x2 ^= x3; x3 ^= x0; x0 &= x1; \
- x0 ^= x2; x2 &= x3; x3 ^= x4; \
- x2 ^= x3; x1 ^= x3; x3 &= x0; \
- x1 ^= x0; x0 ^= x2; x4 ^= x3; \
- })
-
-#define SI1(x0, x1, x2, x3, x4) ({ \
- x1 ^= x3; x4 = x0; \
- x0 ^= x2; x2 = ~x2; x4 |= x1; \
- x4 ^= x3; x3 &= x1; x1 ^= x2; \
- x2 &= x4; x4 ^= x1; x1 |= x3; \
- x3 ^= x0; x2 ^= x0; x0 |= x4; \
- x2 ^= x4; x1 ^= x0; \
- x4 ^= x1; \
- })
-
-#define SI2(x0, x1, x2, x3, x4) ({ \
- x2 ^= x1; x4 = x3; x3 = ~x3; \
- x3 |= x2; x2 ^= x4; x4 ^= x0; \
- x3 ^= x1; x1 |= x2; x2 ^= x0; \
- x1 ^= x4; x4 |= x3; x2 ^= x3; \
- x4 ^= x2; x2 &= x1; \
- x2 ^= x3; x3 ^= x4; x4 ^= x0; \
- })
-
-#define SI3(x0, x1, x2, x3, x4) ({ \
- x2 ^= x1; \
- x4 = x1; x1 &= x2; \
- x1 ^= x0; x0 |= x4; x4 ^= x3; \
- x0 ^= x3; x3 |= x1; x1 ^= x2; \
- x1 ^= x3; x0 ^= x2; x2 ^= x3; \
- x3 &= x1; x1 ^= x0; x0 &= x2; \
- x4 ^= x3; x3 ^= x0; x0 ^= x1; \
- })
-
-#define SI4(x0, x1, x2, x3, x4) ({ \
- x2 ^= x3; x4 = x0; x0 &= x1; \
- x0 ^= x2; x2 |= x3; x4 = ~x4; \
- x1 ^= x0; x0 ^= x2; x2 &= x4; \
- x2 ^= x0; x0 |= x4; \
- x0 ^= x3; x3 &= x2; \
- x4 ^= x3; x3 ^= x1; x1 &= x0; \
- x4 ^= x1; x0 ^= x3; \
- })
-
-#define SI5(x0, x1, x2, x3, x4) ({ \
- x4 = x1; x1 |= x2; \
- x2 ^= x4; x1 ^= x3; x3 &= x4; \
- x2 ^= x3; x3 |= x0; x0 = ~x0; \
- x3 ^= x2; x2 |= x0; x4 ^= x1; \
- x2 ^= x4; x4 &= x0; x0 ^= x1; \
- x1 ^= x3; x0 &= x2; x2 ^= x3; \
- x0 ^= x2; x2 ^= x4; x4 ^= x3; \
- })
-
-#define SI6(x0, x1, x2, x3, x4) ({ \
- x0 ^= x2; \
- x4 = x0; x0 &= x3; x2 ^= x3; \
- x0 ^= x2; x3 ^= x1; x2 |= x4; \
- x2 ^= x3; x3 &= x0; x0 = ~x0; \
- x3 ^= x1; x1 &= x2; x4 ^= x0; \
- x3 ^= x4; x4 ^= x2; x0 ^= x1; \
- x2 ^= x0; \
- })
-
-#define SI7(x0, x1, x2, x3, x4) ({ \
- x4 = x3; x3 &= x0; x0 ^= x2; \
- x2 |= x4; x4 ^= x1; x0 = ~x0; \
- x1 |= x3; x4 ^= x0; x0 &= x2; \
- x0 ^= x1; x1 &= x2; x3 ^= x2; \
- x4 ^= x3; x2 &= x3; x3 |= x0; \
- x1 ^= x4; x3 ^= x4; x4 &= x0; \
- x4 ^= x2; \
- })
-
-int __serpent_setkey(struct serpent_ctx *ctx, const u8 *key,
- unsigned int keylen)
-{
- u32 *k = ctx->expkey;
- u8 *k8 = (u8 *)k;
- u32 r0, r1, r2, r3, r4;
- int i;
-
- /* Copy key, add padding */
-
- for (i = 0; i < keylen; ++i)
- k8[i] = key[i];
- if (i < SERPENT_MAX_KEY_SIZE)
- k8[i++] = 1;
- while (i < SERPENT_MAX_KEY_SIZE)
- k8[i++] = 0;
-
- /* Expand key using polynomial */
-
- r0 = le32_to_cpu(k[3]);
- r1 = le32_to_cpu(k[4]);
- r2 = le32_to_cpu(k[5]);
- r3 = le32_to_cpu(k[6]);
- r4 = le32_to_cpu(k[7]);
-
- keyiter(le32_to_cpu(k[0]), r0, r4, r2, 0, 0);
- keyiter(le32_to_cpu(k[1]), r1, r0, r3, 1, 1);
- keyiter(le32_to_cpu(k[2]), r2, r1, r4, 2, 2);
- keyiter(le32_to_cpu(k[3]), r3, r2, r0, 3, 3);
- keyiter(le32_to_cpu(k[4]), r4, r3, r1, 4, 4);
- keyiter(le32_to_cpu(k[5]), r0, r4, r2, 5, 5);
- keyiter(le32_to_cpu(k[6]), r1, r0, r3, 6, 6);
- keyiter(le32_to_cpu(k[7]), r2, r1, r4, 7, 7);
-
- keyiter(k[0], r3, r2, r0, 8, 8);
- keyiter(k[1], r4, r3, r1, 9, 9);
- keyiter(k[2], r0, r4, r2, 10, 10);
- keyiter(k[3], r1, r0, r3, 11, 11);
- keyiter(k[4], r2, r1, r4, 12, 12);
- keyiter(k[5], r3, r2, r0, 13, 13);
- keyiter(k[6], r4, r3, r1, 14, 14);
- keyiter(k[7], r0, r4, r2, 15, 15);
- keyiter(k[8], r1, r0, r3, 16, 16);
- keyiter(k[9], r2, r1, r4, 17, 17);
- keyiter(k[10], r3, r2, r0, 18, 18);
- keyiter(k[11], r4, r3, r1, 19, 19);
- keyiter(k[12], r0, r4, r2, 20, 20);
- keyiter(k[13], r1, r0, r3, 21, 21);
- keyiter(k[14], r2, r1, r4, 22, 22);
- keyiter(k[15], r3, r2, r0, 23, 23);
- keyiter(k[16], r4, r3, r1, 24, 24);
- keyiter(k[17], r0, r4, r2, 25, 25);
- keyiter(k[18], r1, r0, r3, 26, 26);
- keyiter(k[19], r2, r1, r4, 27, 27);
- keyiter(k[20], r3, r2, r0, 28, 28);
- keyiter(k[21], r4, r3, r1, 29, 29);
- keyiter(k[22], r0, r4, r2, 30, 30);
- keyiter(k[23], r1, r0, r3, 31, 31);
-
- k += 50;
-
- keyiter(k[-26], r2, r1, r4, 32, -18);
- keyiter(k[-25], r3, r2, r0, 33, -17);
- keyiter(k[-24], r4, r3, r1, 34, -16);
- keyiter(k[-23], r0, r4, r2, 35, -15);
- keyiter(k[-22], r1, r0, r3, 36, -14);
- keyiter(k[-21], r2, r1, r4, 37, -13);
- keyiter(k[-20], r3, r2, r0, 38, -12);
- keyiter(k[-19], r4, r3, r1, 39, -11);
- keyiter(k[-18], r0, r4, r2, 40, -10);
- keyiter(k[-17], r1, r0, r3, 41, -9);
- keyiter(k[-16], r2, r1, r4, 42, -8);
- keyiter(k[-15], r3, r2, r0, 43, -7);
- keyiter(k[-14], r4, r3, r1, 44, -6);
- keyiter(k[-13], r0, r4, r2, 45, -5);
- keyiter(k[-12], r1, r0, r3, 46, -4);
- keyiter(k[-11], r2, r1, r4, 47, -3);
- keyiter(k[-10], r3, r2, r0, 48, -2);
- keyiter(k[-9], r4, r3, r1, 49, -1);
- keyiter(k[-8], r0, r4, r2, 50, 0);
- keyiter(k[-7], r1, r0, r3, 51, 1);
- keyiter(k[-6], r2, r1, r4, 52, 2);
- keyiter(k[-5], r3, r2, r0, 53, 3);
- keyiter(k[-4], r4, r3, r1, 54, 4);
- keyiter(k[-3], r0, r4, r2, 55, 5);
- keyiter(k[-2], r1, r0, r3, 56, 6);
- keyiter(k[-1], r2, r1, r4, 57, 7);
- keyiter(k[0], r3, r2, r0, 58, 8);
- keyiter(k[1], r4, r3, r1, 59, 9);
- keyiter(k[2], r0, r4, r2, 60, 10);
- keyiter(k[3], r1, r0, r3, 61, 11);
- keyiter(k[4], r2, r1, r4, 62, 12);
- keyiter(k[5], r3, r2, r0, 63, 13);
- keyiter(k[6], r4, r3, r1, 64, 14);
- keyiter(k[7], r0, r4, r2, 65, 15);
- keyiter(k[8], r1, r0, r3, 66, 16);
- keyiter(k[9], r2, r1, r4, 67, 17);
- keyiter(k[10], r3, r2, r0, 68, 18);
- keyiter(k[11], r4, r3, r1, 69, 19);
- keyiter(k[12], r0, r4, r2, 70, 20);
- keyiter(k[13], r1, r0, r3, 71, 21);
- keyiter(k[14], r2, r1, r4, 72, 22);
- keyiter(k[15], r3, r2, r0, 73, 23);
- keyiter(k[16], r4, r3, r1, 74, 24);
- keyiter(k[17], r0, r4, r2, 75, 25);
- keyiter(k[18], r1, r0, r3, 76, 26);
- keyiter(k[19], r2, r1, r4, 77, 27);
- keyiter(k[20], r3, r2, r0, 78, 28);
- keyiter(k[21], r4, r3, r1, 79, 29);
- keyiter(k[22], r0, r4, r2, 80, 30);
- keyiter(k[23], r1, r0, r3, 81, 31);
-
- k += 50;
-
- keyiter(k[-26], r2, r1, r4, 82, -18);
- keyiter(k[-25], r3, r2, r0, 83, -17);
- keyiter(k[-24], r4, r3, r1, 84, -16);
- keyiter(k[-23], r0, r4, r2, 85, -15);
- keyiter(k[-22], r1, r0, r3, 86, -14);
- keyiter(k[-21], r2, r1, r4, 87, -13);
- keyiter(k[-20], r3, r2, r0, 88, -12);
- keyiter(k[-19], r4, r3, r1, 89, -11);
- keyiter(k[-18], r0, r4, r2, 90, -10);
- keyiter(k[-17], r1, r0, r3, 91, -9);
- keyiter(k[-16], r2, r1, r4, 92, -8);
- keyiter(k[-15], r3, r2, r0, 93, -7);
- keyiter(k[-14], r4, r3, r1, 94, -6);
- keyiter(k[-13], r0, r4, r2, 95, -5);
- keyiter(k[-12], r1, r0, r3, 96, -4);
- keyiter(k[-11], r2, r1, r4, 97, -3);
- keyiter(k[-10], r3, r2, r0, 98, -2);
- keyiter(k[-9], r4, r3, r1, 99, -1);
- keyiter(k[-8], r0, r4, r2, 100, 0);
- keyiter(k[-7], r1, r0, r3, 101, 1);
- keyiter(k[-6], r2, r1, r4, 102, 2);
- keyiter(k[-5], r3, r2, r0, 103, 3);
- keyiter(k[-4], r4, r3, r1, 104, 4);
- keyiter(k[-3], r0, r4, r2, 105, 5);
- keyiter(k[-2], r1, r0, r3, 106, 6);
- keyiter(k[-1], r2, r1, r4, 107, 7);
- keyiter(k[0], r3, r2, r0, 108, 8);
- keyiter(k[1], r4, r3, r1, 109, 9);
- keyiter(k[2], r0, r4, r2, 110, 10);
- keyiter(k[3], r1, r0, r3, 111, 11);
- keyiter(k[4], r2, r1, r4, 112, 12);
- keyiter(k[5], r3, r2, r0, 113, 13);
- keyiter(k[6], r4, r3, r1, 114, 14);
- keyiter(k[7], r0, r4, r2, 115, 15);
- keyiter(k[8], r1, r0, r3, 116, 16);
- keyiter(k[9], r2, r1, r4, 117, 17);
- keyiter(k[10], r3, r2, r0, 118, 18);
- keyiter(k[11], r4, r3, r1, 119, 19);
- keyiter(k[12], r0, r4, r2, 120, 20);
- keyiter(k[13], r1, r0, r3, 121, 21);
- keyiter(k[14], r2, r1, r4, 122, 22);
- keyiter(k[15], r3, r2, r0, 123, 23);
- keyiter(k[16], r4, r3, r1, 124, 24);
- keyiter(k[17], r0, r4, r2, 125, 25);
- keyiter(k[18], r1, r0, r3, 126, 26);
- keyiter(k[19], r2, r1, r4, 127, 27);
- keyiter(k[20], r3, r2, r0, 128, 28);
- keyiter(k[21], r4, r3, r1, 129, 29);
- keyiter(k[22], r0, r4, r2, 130, 30);
- keyiter(k[23], r1, r0, r3, 131, 31);
-
- /* Apply S-boxes */
-
- S3(r3, r4, r0, r1, r2); store_and_load_keys(r1, r2, r4, r3, 28, 24);
- S4(r1, r2, r4, r3, r0); store_and_load_keys(r2, r4, r3, r0, 24, 20);
- S5(r2, r4, r3, r0, r1); store_and_load_keys(r1, r2, r4, r0, 20, 16);
- S6(r1, r2, r4, r0, r3); store_and_load_keys(r4, r3, r2, r0, 16, 12);
- S7(r4, r3, r2, r0, r1); store_and_load_keys(r1, r2, r0, r4, 12, 8);
- S0(r1, r2, r0, r4, r3); store_and_load_keys(r0, r2, r4, r1, 8, 4);
- S1(r0, r2, r4, r1, r3); store_and_load_keys(r3, r4, r1, r0, 4, 0);
- S2(r3, r4, r1, r0, r2); store_and_load_keys(r2, r4, r3, r0, 0, -4);
- S3(r2, r4, r3, r0, r1); store_and_load_keys(r0, r1, r4, r2, -4, -8);
- S4(r0, r1, r4, r2, r3); store_and_load_keys(r1, r4, r2, r3, -8, -12);
- S5(r1, r4, r2, r3, r0); store_and_load_keys(r0, r1, r4, r3, -12, -16);
- S6(r0, r1, r4, r3, r2); store_and_load_keys(r4, r2, r1, r3, -16, -20);
- S7(r4, r2, r1, r3, r0); store_and_load_keys(r0, r1, r3, r4, -20, -24);
- S0(r0, r1, r3, r4, r2); store_and_load_keys(r3, r1, r4, r0, -24, -28);
- k -= 50;
- S1(r3, r1, r4, r0, r2); store_and_load_keys(r2, r4, r0, r3, 22, 18);
- S2(r2, r4, r0, r3, r1); store_and_load_keys(r1, r4, r2, r3, 18, 14);
- S3(r1, r4, r2, r3, r0); store_and_load_keys(r3, r0, r4, r1, 14, 10);
- S4(r3, r0, r4, r1, r2); store_and_load_keys(r0, r4, r1, r2, 10, 6);
- S5(r0, r4, r1, r2, r3); store_and_load_keys(r3, r0, r4, r2, 6, 2);
- S6(r3, r0, r4, r2, r1); store_and_load_keys(r4, r1, r0, r2, 2, -2);
- S7(r4, r1, r0, r2, r3); store_and_load_keys(r3, r0, r2, r4, -2, -6);
- S0(r3, r0, r2, r4, r1); store_and_load_keys(r2, r0, r4, r3, -6, -10);
- S1(r2, r0, r4, r3, r1); store_and_load_keys(r1, r4, r3, r2, -10, -14);
- S2(r1, r4, r3, r2, r0); store_and_load_keys(r0, r4, r1, r2, -14, -18);
- S3(r0, r4, r1, r2, r3); store_and_load_keys(r2, r3, r4, r0, -18, -22);
- k -= 50;
- S4(r2, r3, r4, r0, r1); store_and_load_keys(r3, r4, r0, r1, 28, 24);
- S5(r3, r4, r0, r1, r2); store_and_load_keys(r2, r3, r4, r1, 24, 20);
- S6(r2, r3, r4, r1, r0); store_and_load_keys(r4, r0, r3, r1, 20, 16);
- S7(r4, r0, r3, r1, r2); store_and_load_keys(r2, r3, r1, r4, 16, 12);
- S0(r2, r3, r1, r4, r0); store_and_load_keys(r1, r3, r4, r2, 12, 8);
- S1(r1, r3, r4, r2, r0); store_and_load_keys(r0, r4, r2, r1, 8, 4);
- S2(r0, r4, r2, r1, r3); store_and_load_keys(r3, r4, r0, r1, 4, 0);
- S3(r3, r4, r0, r1, r2); storekeys(r1, r2, r4, r3, 0);
-
- return 0;
-}
-EXPORT_SYMBOL_GPL(__serpent_setkey);
-
-int serpent_setkey(struct crypto_tfm *tfm, const u8 *key, unsigned int keylen)
-{
- return __serpent_setkey(crypto_tfm_ctx(tfm), key, keylen);
-}
-EXPORT_SYMBOL_GPL(serpent_setkey);
-
-void __serpent_encrypt(struct serpent_ctx *ctx, u8 *dst, const u8 *src)
-{
- const u32 *k = ctx->expkey;
- const __le32 *s = (const __le32 *)src;
- __le32 *d = (__le32 *)dst;
- u32 r0, r1, r2, r3, r4;
-
-/*
- * Note: The conversions between u8* and u32* might cause trouble
- * on architectures with stricter alignment rules than x86
- */
-
- r0 = le32_to_cpu(s[0]);
- r1 = le32_to_cpu(s[1]);
- r2 = le32_to_cpu(s[2]);
- r3 = le32_to_cpu(s[3]);
-
- K(r0, r1, r2, r3, 0);
- S0(r0, r1, r2, r3, r4); LK(r2, r1, r3, r0, r4, 1);
- S1(r2, r1, r3, r0, r4); LK(r4, r3, r0, r2, r1, 2);
- S2(r4, r3, r0, r2, r1); LK(r1, r3, r4, r2, r0, 3);
- S3(r1, r3, r4, r2, r0); LK(r2, r0, r3, r1, r4, 4);
- S4(r2, r0, r3, r1, r4); LK(r0, r3, r1, r4, r2, 5);
- S5(r0, r3, r1, r4, r2); LK(r2, r0, r3, r4, r1, 6);
- S6(r2, r0, r3, r4, r1); LK(r3, r1, r0, r4, r2, 7);
- S7(r3, r1, r0, r4, r2); LK(r2, r0, r4, r3, r1, 8);
- S0(r2, r0, r4, r3, r1); LK(r4, r0, r3, r2, r1, 9);
- S1(r4, r0, r3, r2, r1); LK(r1, r3, r2, r4, r0, 10);
- S2(r1, r3, r2, r4, r0); LK(r0, r3, r1, r4, r2, 11);
- S3(r0, r3, r1, r4, r2); LK(r4, r2, r3, r0, r1, 12);
- S4(r4, r2, r3, r0, r1); LK(r2, r3, r0, r1, r4, 13);
- S5(r2, r3, r0, r1, r4); LK(r4, r2, r3, r1, r0, 14);
- S6(r4, r2, r3, r1, r0); LK(r3, r0, r2, r1, r4, 15);
- S7(r3, r0, r2, r1, r4); LK(r4, r2, r1, r3, r0, 16);
- S0(r4, r2, r1, r3, r0); LK(r1, r2, r3, r4, r0, 17);
- S1(r1, r2, r3, r4, r0); LK(r0, r3, r4, r1, r2, 18);
- S2(r0, r3, r4, r1, r2); LK(r2, r3, r0, r1, r4, 19);
- S3(r2, r3, r0, r1, r4); LK(r1, r4, r3, r2, r0, 20);
- S4(r1, r4, r3, r2, r0); LK(r4, r3, r2, r0, r1, 21);
- S5(r4, r3, r2, r0, r1); LK(r1, r4, r3, r0, r2, 22);
- S6(r1, r4, r3, r0, r2); LK(r3, r2, r4, r0, r1, 23);
- S7(r3, r2, r4, r0, r1); LK(r1, r4, r0, r3, r2, 24);
- S0(r1, r4, r0, r3, r2); LK(r0, r4, r3, r1, r2, 25);
- S1(r0, r4, r3, r1, r2); LK(r2, r3, r1, r0, r4, 26);
- S2(r2, r3, r1, r0, r4); LK(r4, r3, r2, r0, r1, 27);
- S3(r4, r3, r2, r0, r1); LK(r0, r1, r3, r4, r2, 28);
- S4(r0, r1, r3, r4, r2); LK(r1, r3, r4, r2, r0, 29);
- S5(r1, r3, r4, r2, r0); LK(r0, r1, r3, r2, r4, 30);
- S6(r0, r1, r3, r2, r4); LK(r3, r4, r1, r2, r0, 31);
- S7(r3, r4, r1, r2, r0); K(r0, r1, r2, r3, 32);
-
- d[0] = cpu_to_le32(r0);
- d[1] = cpu_to_le32(r1);
- d[2] = cpu_to_le32(r2);
- d[3] = cpu_to_le32(r3);
-}
-EXPORT_SYMBOL_GPL(__serpent_encrypt);
-
-static void serpent_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
-{
- struct serpent_ctx *ctx = crypto_tfm_ctx(tfm);
-
- __serpent_encrypt(ctx, dst, src);
-}
-
-void __serpent_decrypt(struct serpent_ctx *ctx, u8 *dst, const u8 *src)
-{
- const u32 *k = ctx->expkey;
- const __le32 *s = (const __le32 *)src;
- __le32 *d = (__le32 *)dst;
- u32 r0, r1, r2, r3, r4;
-
- r0 = le32_to_cpu(s[0]);
- r1 = le32_to_cpu(s[1]);
- r2 = le32_to_cpu(s[2]);
- r3 = le32_to_cpu(s[3]);
-
- K(r0, r1, r2, r3, 32);
- SI7(r0, r1, r2, r3, r4); KL(r1, r3, r0, r4, r2, 31);
- SI6(r1, r3, r0, r4, r2); KL(r0, r2, r4, r1, r3, 30);
- SI5(r0, r2, r4, r1, r3); KL(r2, r3, r0, r4, r1, 29);
- SI4(r2, r3, r0, r4, r1); KL(r2, r0, r1, r4, r3, 28);
- SI3(r2, r0, r1, r4, r3); KL(r1, r2, r3, r4, r0, 27);
- SI2(r1, r2, r3, r4, r0); KL(r2, r0, r4, r3, r1, 26);
- SI1(r2, r0, r4, r3, r1); KL(r1, r0, r4, r3, r2, 25);
- SI0(r1, r0, r4, r3, r2); KL(r4, r2, r0, r1, r3, 24);
- SI7(r4, r2, r0, r1, r3); KL(r2, r1, r4, r3, r0, 23);
- SI6(r2, r1, r4, r3, r0); KL(r4, r0, r3, r2, r1, 22);
- SI5(r4, r0, r3, r2, r1); KL(r0, r1, r4, r3, r2, 21);
- SI4(r0, r1, r4, r3, r2); KL(r0, r4, r2, r3, r1, 20);
- SI3(r0, r4, r2, r3, r1); KL(r2, r0, r1, r3, r4, 19);
- SI2(r2, r0, r1, r3, r4); KL(r0, r4, r3, r1, r2, 18);
- SI1(r0, r4, r3, r1, r2); KL(r2, r4, r3, r1, r0, 17);
- SI0(r2, r4, r3, r1, r0); KL(r3, r0, r4, r2, r1, 16);
- SI7(r3, r0, r4, r2, r1); KL(r0, r2, r3, r1, r4, 15);
- SI6(r0, r2, r3, r1, r4); KL(r3, r4, r1, r0, r2, 14);
- SI5(r3, r4, r1, r0, r2); KL(r4, r2, r3, r1, r0, 13);
- SI4(r4, r2, r3, r1, r0); KL(r4, r3, r0, r1, r2, 12);
- SI3(r4, r3, r0, r1, r2); KL(r0, r4, r2, r1, r3, 11);
- SI2(r0, r4, r2, r1, r3); KL(r4, r3, r1, r2, r0, 10);
- SI1(r4, r3, r1, r2, r0); KL(r0, r3, r1, r2, r4, 9);
- SI0(r0, r3, r1, r2, r4); KL(r1, r4, r3, r0, r2, 8);
- SI7(r1, r4, r3, r0, r2); KL(r4, r0, r1, r2, r3, 7);
- SI6(r4, r0, r1, r2, r3); KL(r1, r3, r2, r4, r0, 6);
- SI5(r1, r3, r2, r4, r0); KL(r3, r0, r1, r2, r4, 5);
- SI4(r3, r0, r1, r2, r4); KL(r3, r1, r4, r2, r0, 4);
- SI3(r3, r1, r4, r2, r0); KL(r4, r3, r0, r2, r1, 3);
- SI2(r4, r3, r0, r2, r1); KL(r3, r1, r2, r0, r4, 2);
- SI1(r3, r1, r2, r0, r4); KL(r4, r1, r2, r0, r3, 1);
- SI0(r4, r1, r2, r0, r3); K(r2, r3, r1, r4, 0);
-
- d[0] = cpu_to_le32(r2);
- d[1] = cpu_to_le32(r3);
- d[2] = cpu_to_le32(r1);
- d[3] = cpu_to_le32(r4);
-}
-EXPORT_SYMBOL_GPL(__serpent_decrypt);
-
-static void serpent_decrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
-{
- struct serpent_ctx *ctx = crypto_tfm_ctx(tfm);
-
- __serpent_decrypt(ctx, dst, src);
-}
-
-static struct crypto_alg serpent_alg = {
- .cra_name = "serpent",
- .cra_driver_name = "serpent-generic",
- .cra_priority = 100,
- .cra_flags = CRYPTO_ALG_TYPE_CIPHER,
- .cra_blocksize = SERPENT_BLOCK_SIZE,
- .cra_ctxsize = sizeof(struct serpent_ctx),
- .cra_alignmask = 3,
- .cra_module = THIS_MODULE,
- .cra_list = LIST_HEAD_INIT(serpent_alg.cra_list),
- .cra_u = { .cipher = {
- .cia_min_keysize = SERPENT_MIN_KEY_SIZE,
- .cia_max_keysize = SERPENT_MAX_KEY_SIZE,
- .cia_setkey = serpent_setkey,
- .cia_encrypt = serpent_encrypt,
- .cia_decrypt = serpent_decrypt } }
-};
-
-static int tnepres_setkey(struct crypto_tfm *tfm, const u8 *key,
- unsigned int keylen)
-{
- u8 rev_key[SERPENT_MAX_KEY_SIZE];
- int i;
-
- for (i = 0; i < keylen; ++i)
- rev_key[keylen - i - 1] = key[i];
-
- return serpent_setkey(tfm, rev_key, keylen);
-}
-
-static void tnepres_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
-{
- const u32 * const s = (const u32 * const)src;
- u32 * const d = (u32 * const)dst;
-
- u32 rs[4], rd[4];
-
- rs[0] = swab32(s[3]);
- rs[1] = swab32(s[2]);
- rs[2] = swab32(s[1]);
- rs[3] = swab32(s[0]);
-
- serpent_encrypt(tfm, (u8 *)rd, (u8 *)rs);
-
- d[0] = swab32(rd[3]);
- d[1] = swab32(rd[2]);
- d[2] = swab32(rd[1]);
- d[3] = swab32(rd[0]);
-}
-
-static void tnepres_decrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
-{
- const u32 * const s = (const u32 * const)src;
- u32 * const d = (u32 * const)dst;
-
- u32 rs[4], rd[4];
-
- rs[0] = swab32(s[3]);
- rs[1] = swab32(s[2]);
- rs[2] = swab32(s[1]);
- rs[3] = swab32(s[0]);
-
- serpent_decrypt(tfm, (u8 *)rd, (u8 *)rs);
-
- d[0] = swab32(rd[3]);
- d[1] = swab32(rd[2]);
- d[2] = swab32(rd[1]);
- d[3] = swab32(rd[0]);
-}
-
-static struct crypto_alg tnepres_alg = {
- .cra_name = "tnepres",
- .cra_flags = CRYPTO_ALG_TYPE_CIPHER,
- .cra_blocksize = SERPENT_BLOCK_SIZE,
- .cra_ctxsize = sizeof(struct serpent_ctx),
- .cra_alignmask = 3,
- .cra_module = THIS_MODULE,
- .cra_list = LIST_HEAD_INIT(serpent_alg.cra_list),
- .cra_u = { .cipher = {
- .cia_min_keysize = SERPENT_MIN_KEY_SIZE,
- .cia_max_keysize = SERPENT_MAX_KEY_SIZE,
- .cia_setkey = tnepres_setkey,
- .cia_encrypt = tnepres_encrypt,
- .cia_decrypt = tnepres_decrypt } }
-};
-
-static int __init serpent_mod_init(void)
-{
- int ret = crypto_register_alg(&serpent_alg);
-
- if (ret)
- return ret;
-
- ret = crypto_register_alg(&tnepres_alg);
-
- if (ret)
- crypto_unregister_alg(&serpent_alg);
-
- return ret;
-}
-
-static void __exit serpent_mod_fini(void)
-{
- crypto_unregister_alg(&tnepres_alg);
- crypto_unregister_alg(&serpent_alg);
-}
-
-module_init(serpent_mod_init);
-module_exit(serpent_mod_fini);
-
-MODULE_LICENSE("GPL");
-MODULE_DESCRIPTION("Serpent and tnepres (kerneli compatible serpent reversed) Cipher Algorithm");
-MODULE_AUTHOR("Dag Arne Osvik <osvik@ii.uib.no>");
-MODULE_ALIAS("tnepres");
-MODULE_ALIAS("serpent");
--- /dev/null
+/*
+ * Cryptographic API.
+ *
+ * Serpent Cipher Algorithm.
+ *
+ * Copyright (C) 2002 Dag Arne Osvik <osvik@ii.uib.no>
+ * 2003 Herbert Valerio Riedel <hvr@gnu.org>
+ *
+ * Added tnepres support:
+ * Ruben Jesus Garcia Hernandez <ruben@ugr.es>, 18.10.2004
+ * Based on code by hvr
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/errno.h>
+#include <asm/byteorder.h>
+#include <linux/crypto.h>
+#include <linux/types.h>
+#include <crypto/serpent.h>
+
+/* Key is padded to the maximum of 256 bits before round key generation.
+ * Any key length <= 256 bits (32 bytes) is allowed by the algorithm.
+ */
+
+#define PHI 0x9e3779b9UL
+
+#define keyiter(a, b, c, d, i, j) \
+ ({ b ^= d; b ^= c; b ^= a; b ^= PHI ^ i; b = rol32(b, 11); k[j] = b; })
+
+#define loadkeys(x0, x1, x2, x3, i) \
+ ({ x0 = k[i]; x1 = k[i+1]; x2 = k[i+2]; x3 = k[i+3]; })
+
+#define storekeys(x0, x1, x2, x3, i) \
+ ({ k[i] = x0; k[i+1] = x1; k[i+2] = x2; k[i+3] = x3; })
+
+#define store_and_load_keys(x0, x1, x2, x3, s, l) \
+ ({ storekeys(x0, x1, x2, x3, s); loadkeys(x0, x1, x2, x3, l); })
+
+#define K(x0, x1, x2, x3, i) ({ \
+ x3 ^= k[4*(i)+3]; x2 ^= k[4*(i)+2]; \
+ x1 ^= k[4*(i)+1]; x0 ^= k[4*(i)+0]; \
+ })
+
+#define LK(x0, x1, x2, x3, x4, i) ({ \
+ x0 = rol32(x0, 13);\
+ x2 = rol32(x2, 3); x1 ^= x0; x4 = x0 << 3; \
+ x3 ^= x2; x1 ^= x2; \
+ x1 = rol32(x1, 1); x3 ^= x4; \
+ x3 = rol32(x3, 7); x4 = x1; \
+ x0 ^= x1; x4 <<= 7; x2 ^= x3; \
+ x0 ^= x3; x2 ^= x4; x3 ^= k[4*i+3]; \
+ x1 ^= k[4*i+1]; x0 = rol32(x0, 5); x2 = rol32(x2, 22);\
+ x0 ^= k[4*i+0]; x2 ^= k[4*i+2]; \
+ })
+
+#define KL(x0, x1, x2, x3, x4, i) ({ \
+ x0 ^= k[4*i+0]; x1 ^= k[4*i+1]; x2 ^= k[4*i+2]; \
+ x3 ^= k[4*i+3]; x0 = ror32(x0, 5); x2 = ror32(x2, 22);\
+ x4 = x1; x2 ^= x3; x0 ^= x3; \
+ x4 <<= 7; x0 ^= x1; x1 = ror32(x1, 1); \
+ x2 ^= x4; x3 = ror32(x3, 7); x4 = x0 << 3; \
+ x1 ^= x0; x3 ^= x4; x0 = ror32(x0, 13);\
+ x1 ^= x2; x3 ^= x2; x2 = ror32(x2, 3); \
+ })
+
+#define S0(x0, x1, x2, x3, x4) ({ \
+ x4 = x3; \
+ x3 |= x0; x0 ^= x4; x4 ^= x2; \
+ x4 = ~x4; x3 ^= x1; x1 &= x0; \
+ x1 ^= x4; x2 ^= x0; x0 ^= x3; \
+ x4 |= x0; x0 ^= x2; x2 &= x1; \
+ x3 ^= x2; x1 = ~x1; x2 ^= x4; \
+ x1 ^= x2; \
+ })
+
+#define S1(x0, x1, x2, x3, x4) ({ \
+ x4 = x1; \
+ x1 ^= x0; x0 ^= x3; x3 = ~x3; \
+ x4 &= x1; x0 |= x1; x3 ^= x2; \
+ x0 ^= x3; x1 ^= x3; x3 ^= x4; \
+ x1 |= x4; x4 ^= x2; x2 &= x0; \
+ x2 ^= x1; x1 |= x0; x0 = ~x0; \
+ x0 ^= x2; x4 ^= x1; \
+ })
+
+#define S2(x0, x1, x2, x3, x4) ({ \
+ x3 = ~x3; \
+ x1 ^= x0; x4 = x0; x0 &= x2; \
+ x0 ^= x3; x3 |= x4; x2 ^= x1; \
+ x3 ^= x1; x1 &= x0; x0 ^= x2; \
+ x2 &= x3; x3 |= x1; x0 = ~x0; \
+ x3 ^= x0; x4 ^= x0; x0 ^= x2; \
+ x1 |= x2; \
+ })
+
+#define S3(x0, x1, x2, x3, x4) ({ \
+ x4 = x1; \
+ x1 ^= x3; x3 |= x0; x4 &= x0; \
+ x0 ^= x2; x2 ^= x1; x1 &= x3; \
+ x2 ^= x3; x0 |= x4; x4 ^= x3; \
+ x1 ^= x0; x0 &= x3; x3 &= x4; \
+ x3 ^= x2; x4 |= x1; x2 &= x1; \
+ x4 ^= x3; x0 ^= x3; x3 ^= x2; \
+ })
+
+#define S4(x0, x1, x2, x3, x4) ({ \
+ x4 = x3; \
+ x3 &= x0; x0 ^= x4; \
+ x3 ^= x2; x2 |= x4; x0 ^= x1; \
+ x4 ^= x3; x2 |= x0; \
+ x2 ^= x1; x1 &= x0; \
+ x1 ^= x4; x4 &= x2; x2 ^= x3; \
+ x4 ^= x0; x3 |= x1; x1 = ~x1; \
+ x3 ^= x0; \
+ })
+
+#define S5(x0, x1, x2, x3, x4) ({ \
+ x4 = x1; x1 |= x0; \
+ x2 ^= x1; x3 = ~x3; x4 ^= x0; \
+ x0 ^= x2; x1 &= x4; x4 |= x3; \
+ x4 ^= x0; x0 &= x3; x1 ^= x3; \
+ x3 ^= x2; x0 ^= x1; x2 &= x4; \
+ x1 ^= x2; x2 &= x0; \
+ x3 ^= x2; \
+ })
+
+#define S6(x0, x1, x2, x3, x4) ({ \
+ x4 = x1; \
+ x3 ^= x0; x1 ^= x2; x2 ^= x0; \
+ x0 &= x3; x1 |= x3; x4 = ~x4; \
+ x0 ^= x1; x1 ^= x2; \
+ x3 ^= x4; x4 ^= x0; x2 &= x0; \
+ x4 ^= x1; x2 ^= x3; x3 &= x1; \
+ x3 ^= x0; x1 ^= x2; \
+ })
+
+#define S7(x0, x1, x2, x3, x4) ({ \
+ x1 = ~x1; \
+ x4 = x1; x0 = ~x0; x1 &= x2; \
+ x1 ^= x3; x3 |= x4; x4 ^= x2; \
+ x2 ^= x3; x3 ^= x0; x0 |= x1; \
+ x2 &= x0; x0 ^= x4; x4 ^= x3; \
+ x3 &= x0; x4 ^= x1; \
+ x2 ^= x4; x3 ^= x1; x4 |= x0; \
+ x4 ^= x1; \
+ })
+
+#define SI0(x0, x1, x2, x3, x4) ({ \
+ x4 = x3; x1 ^= x0; \
+ x3 |= x1; x4 ^= x1; x0 = ~x0; \
+ x2 ^= x3; x3 ^= x0; x0 &= x1; \
+ x0 ^= x2; x2 &= x3; x3 ^= x4; \
+ x2 ^= x3; x1 ^= x3; x3 &= x0; \
+ x1 ^= x0; x0 ^= x2; x4 ^= x3; \
+ })
+
+#define SI1(x0, x1, x2, x3, x4) ({ \
+ x1 ^= x3; x4 = x0; \
+ x0 ^= x2; x2 = ~x2; x4 |= x1; \
+ x4 ^= x3; x3 &= x1; x1 ^= x2; \
+ x2 &= x4; x4 ^= x1; x1 |= x3; \
+ x3 ^= x0; x2 ^= x0; x0 |= x4; \
+ x2 ^= x4; x1 ^= x0; \
+ x4 ^= x1; \
+ })
+
+#define SI2(x0, x1, x2, x3, x4) ({ \
+ x2 ^= x1; x4 = x3; x3 = ~x3; \
+ x3 |= x2; x2 ^= x4; x4 ^= x0; \
+ x3 ^= x1; x1 |= x2; x2 ^= x0; \
+ x1 ^= x4; x4 |= x3; x2 ^= x3; \
+ x4 ^= x2; x2 &= x1; \
+ x2 ^= x3; x3 ^= x4; x4 ^= x0; \
+ })
+
+#define SI3(x0, x1, x2, x3, x4) ({ \
+ x2 ^= x1; \
+ x4 = x1; x1 &= x2; \
+ x1 ^= x0; x0 |= x4; x4 ^= x3; \
+ x0 ^= x3; x3 |= x1; x1 ^= x2; \
+ x1 ^= x3; x0 ^= x2; x2 ^= x3; \
+ x3 &= x1; x1 ^= x0; x0 &= x2; \
+ x4 ^= x3; x3 ^= x0; x0 ^= x1; \
+ })
+
+#define SI4(x0, x1, x2, x3, x4) ({ \
+ x2 ^= x3; x4 = x0; x0 &= x1; \
+ x0 ^= x2; x2 |= x3; x4 = ~x4; \
+ x1 ^= x0; x0 ^= x2; x2 &= x4; \
+ x2 ^= x0; x0 |= x4; \
+ x0 ^= x3; x3 &= x2; \
+ x4 ^= x3; x3 ^= x1; x1 &= x0; \
+ x4 ^= x1; x0 ^= x3; \
+ })
+
+#define SI5(x0, x1, x2, x3, x4) ({ \
+ x4 = x1; x1 |= x2; \
+ x2 ^= x4; x1 ^= x3; x3 &= x4; \
+ x2 ^= x3; x3 |= x0; x0 = ~x0; \
+ x3 ^= x2; x2 |= x0; x4 ^= x1; \
+ x2 ^= x4; x4 &= x0; x0 ^= x1; \
+ x1 ^= x3; x0 &= x2; x2 ^= x3; \
+ x0 ^= x2; x2 ^= x4; x4 ^= x3; \
+ })
+
+#define SI6(x0, x1, x2, x3, x4) ({ \
+ x0 ^= x2; \
+ x4 = x0; x0 &= x3; x2 ^= x3; \
+ x0 ^= x2; x3 ^= x1; x2 |= x4; \
+ x2 ^= x3; x3 &= x0; x0 = ~x0; \
+ x3 ^= x1; x1 &= x2; x4 ^= x0; \
+ x3 ^= x4; x4 ^= x2; x0 ^= x1; \
+ x2 ^= x0; \
+ })
+
+#define SI7(x0, x1, x2, x3, x4) ({ \
+ x4 = x3; x3 &= x0; x0 ^= x2; \
+ x2 |= x4; x4 ^= x1; x0 = ~x0; \
+ x1 |= x3; x4 ^= x0; x0 &= x2; \
+ x0 ^= x1; x1 &= x2; x3 ^= x2; \
+ x4 ^= x3; x2 &= x3; x3 |= x0; \
+ x1 ^= x4; x3 ^= x4; x4 &= x0; \
+ x4 ^= x2; \
+ })
+
+int __serpent_setkey(struct serpent_ctx *ctx, const u8 *key,
+ unsigned int keylen)
+{
+ u32 *k = ctx->expkey;
+ u8 *k8 = (u8 *)k;
+ u32 r0, r1, r2, r3, r4;
+ int i;
+
+ /* Copy key, add padding */
+
+ for (i = 0; i < keylen; ++i)
+ k8[i] = key[i];
+ if (i < SERPENT_MAX_KEY_SIZE)
+ k8[i++] = 1;
+ while (i < SERPENT_MAX_KEY_SIZE)
+ k8[i++] = 0;
+
+ /* Expand key using polynomial */
+
+ r0 = le32_to_cpu(k[3]);
+ r1 = le32_to_cpu(k[4]);
+ r2 = le32_to_cpu(k[5]);
+ r3 = le32_to_cpu(k[6]);
+ r4 = le32_to_cpu(k[7]);
+
+ keyiter(le32_to_cpu(k[0]), r0, r4, r2, 0, 0);
+ keyiter(le32_to_cpu(k[1]), r1, r0, r3, 1, 1);
+ keyiter(le32_to_cpu(k[2]), r2, r1, r4, 2, 2);
+ keyiter(le32_to_cpu(k[3]), r3, r2, r0, 3, 3);
+ keyiter(le32_to_cpu(k[4]), r4, r3, r1, 4, 4);
+ keyiter(le32_to_cpu(k[5]), r0, r4, r2, 5, 5);
+ keyiter(le32_to_cpu(k[6]), r1, r0, r3, 6, 6);
+ keyiter(le32_to_cpu(k[7]), r2, r1, r4, 7, 7);
+
+ keyiter(k[0], r3, r2, r0, 8, 8);
+ keyiter(k[1], r4, r3, r1, 9, 9);
+ keyiter(k[2], r0, r4, r2, 10, 10);
+ keyiter(k[3], r1, r0, r3, 11, 11);
+ keyiter(k[4], r2, r1, r4, 12, 12);
+ keyiter(k[5], r3, r2, r0, 13, 13);
+ keyiter(k[6], r4, r3, r1, 14, 14);
+ keyiter(k[7], r0, r4, r2, 15, 15);
+ keyiter(k[8], r1, r0, r3, 16, 16);
+ keyiter(k[9], r2, r1, r4, 17, 17);
+ keyiter(k[10], r3, r2, r0, 18, 18);
+ keyiter(k[11], r4, r3, r1, 19, 19);
+ keyiter(k[12], r0, r4, r2, 20, 20);
+ keyiter(k[13], r1, r0, r3, 21, 21);
+ keyiter(k[14], r2, r1, r4, 22, 22);
+ keyiter(k[15], r3, r2, r0, 23, 23);
+ keyiter(k[16], r4, r3, r1, 24, 24);
+ keyiter(k[17], r0, r4, r2, 25, 25);
+ keyiter(k[18], r1, r0, r3, 26, 26);
+ keyiter(k[19], r2, r1, r4, 27, 27);
+ keyiter(k[20], r3, r2, r0, 28, 28);
+ keyiter(k[21], r4, r3, r1, 29, 29);
+ keyiter(k[22], r0, r4, r2, 30, 30);
+ keyiter(k[23], r1, r0, r3, 31, 31);
+
+ k += 50;
+
+ keyiter(k[-26], r2, r1, r4, 32, -18);
+ keyiter(k[-25], r3, r2, r0, 33, -17);
+ keyiter(k[-24], r4, r3, r1, 34, -16);
+ keyiter(k[-23], r0, r4, r2, 35, -15);
+ keyiter(k[-22], r1, r0, r3, 36, -14);
+ keyiter(k[-21], r2, r1, r4, 37, -13);
+ keyiter(k[-20], r3, r2, r0, 38, -12);
+ keyiter(k[-19], r4, r3, r1, 39, -11);
+ keyiter(k[-18], r0, r4, r2, 40, -10);
+ keyiter(k[-17], r1, r0, r3, 41, -9);
+ keyiter(k[-16], r2, r1, r4, 42, -8);
+ keyiter(k[-15], r3, r2, r0, 43, -7);
+ keyiter(k[-14], r4, r3, r1, 44, -6);
+ keyiter(k[-13], r0, r4, r2, 45, -5);
+ keyiter(k[-12], r1, r0, r3, 46, -4);
+ keyiter(k[-11], r2, r1, r4, 47, -3);
+ keyiter(k[-10], r3, r2, r0, 48, -2);
+ keyiter(k[-9], r4, r3, r1, 49, -1);
+ keyiter(k[-8], r0, r4, r2, 50, 0);
+ keyiter(k[-7], r1, r0, r3, 51, 1);
+ keyiter(k[-6], r2, r1, r4, 52, 2);
+ keyiter(k[-5], r3, r2, r0, 53, 3);
+ keyiter(k[-4], r4, r3, r1, 54, 4);
+ keyiter(k[-3], r0, r4, r2, 55, 5);
+ keyiter(k[-2], r1, r0, r3, 56, 6);
+ keyiter(k[-1], r2, r1, r4, 57, 7);
+ keyiter(k[0], r3, r2, r0, 58, 8);
+ keyiter(k[1], r4, r3, r1, 59, 9);
+ keyiter(k[2], r0, r4, r2, 60, 10);
+ keyiter(k[3], r1, r0, r3, 61, 11);
+ keyiter(k[4], r2, r1, r4, 62, 12);
+ keyiter(k[5], r3, r2, r0, 63, 13);
+ keyiter(k[6], r4, r3, r1, 64, 14);
+ keyiter(k[7], r0, r4, r2, 65, 15);
+ keyiter(k[8], r1, r0, r3, 66, 16);
+ keyiter(k[9], r2, r1, r4, 67, 17);
+ keyiter(k[10], r3, r2, r0, 68, 18);
+ keyiter(k[11], r4, r3, r1, 69, 19);
+ keyiter(k[12], r0, r4, r2, 70, 20);
+ keyiter(k[13], r1, r0, r3, 71, 21);
+ keyiter(k[14], r2, r1, r4, 72, 22);
+ keyiter(k[15], r3, r2, r0, 73, 23);
+ keyiter(k[16], r4, r3, r1, 74, 24);
+ keyiter(k[17], r0, r4, r2, 75, 25);
+ keyiter(k[18], r1, r0, r3, 76, 26);
+ keyiter(k[19], r2, r1, r4, 77, 27);
+ keyiter(k[20], r3, r2, r0, 78, 28);
+ keyiter(k[21], r4, r3, r1, 79, 29);
+ keyiter(k[22], r0, r4, r2, 80, 30);
+ keyiter(k[23], r1, r0, r3, 81, 31);
+
+ k += 50;
+
+ keyiter(k[-26], r2, r1, r4, 82, -18);
+ keyiter(k[-25], r3, r2, r0, 83, -17);
+ keyiter(k[-24], r4, r3, r1, 84, -16);
+ keyiter(k[-23], r0, r4, r2, 85, -15);
+ keyiter(k[-22], r1, r0, r3, 86, -14);
+ keyiter(k[-21], r2, r1, r4, 87, -13);
+ keyiter(k[-20], r3, r2, r0, 88, -12);
+ keyiter(k[-19], r4, r3, r1, 89, -11);
+ keyiter(k[-18], r0, r4, r2, 90, -10);
+ keyiter(k[-17], r1, r0, r3, 91, -9);
+ keyiter(k[-16], r2, r1, r4, 92, -8);
+ keyiter(k[-15], r3, r2, r0, 93, -7);
+ keyiter(k[-14], r4, r3, r1, 94, -6);
+ keyiter(k[-13], r0, r4, r2, 95, -5);
+ keyiter(k[-12], r1, r0, r3, 96, -4);
+ keyiter(k[-11], r2, r1, r4, 97, -3);
+ keyiter(k[-10], r3, r2, r0, 98, -2);
+ keyiter(k[-9], r4, r3, r1, 99, -1);
+ keyiter(k[-8], r0, r4, r2, 100, 0);
+ keyiter(k[-7], r1, r0, r3, 101, 1);
+ keyiter(k[-6], r2, r1, r4, 102, 2);
+ keyiter(k[-5], r3, r2, r0, 103, 3);
+ keyiter(k[-4], r4, r3, r1, 104, 4);
+ keyiter(k[-3], r0, r4, r2, 105, 5);
+ keyiter(k[-2], r1, r0, r3, 106, 6);
+ keyiter(k[-1], r2, r1, r4, 107, 7);
+ keyiter(k[0], r3, r2, r0, 108, 8);
+ keyiter(k[1], r4, r3, r1, 109, 9);
+ keyiter(k[2], r0, r4, r2, 110, 10);
+ keyiter(k[3], r1, r0, r3, 111, 11);
+ keyiter(k[4], r2, r1, r4, 112, 12);
+ keyiter(k[5], r3, r2, r0, 113, 13);
+ keyiter(k[6], r4, r3, r1, 114, 14);
+ keyiter(k[7], r0, r4, r2, 115, 15);
+ keyiter(k[8], r1, r0, r3, 116, 16);
+ keyiter(k[9], r2, r1, r4, 117, 17);
+ keyiter(k[10], r3, r2, r0, 118, 18);
+ keyiter(k[11], r4, r3, r1, 119, 19);
+ keyiter(k[12], r0, r4, r2, 120, 20);
+ keyiter(k[13], r1, r0, r3, 121, 21);
+ keyiter(k[14], r2, r1, r4, 122, 22);
+ keyiter(k[15], r3, r2, r0, 123, 23);
+ keyiter(k[16], r4, r3, r1, 124, 24);
+ keyiter(k[17], r0, r4, r2, 125, 25);
+ keyiter(k[18], r1, r0, r3, 126, 26);
+ keyiter(k[19], r2, r1, r4, 127, 27);
+ keyiter(k[20], r3, r2, r0, 128, 28);
+ keyiter(k[21], r4, r3, r1, 129, 29);
+ keyiter(k[22], r0, r4, r2, 130, 30);
+ keyiter(k[23], r1, r0, r3, 131, 31);
+
+ /* Apply S-boxes */
+
+ S3(r3, r4, r0, r1, r2); store_and_load_keys(r1, r2, r4, r3, 28, 24);
+ S4(r1, r2, r4, r3, r0); store_and_load_keys(r2, r4, r3, r0, 24, 20);
+ S5(r2, r4, r3, r0, r1); store_and_load_keys(r1, r2, r4, r0, 20, 16);
+ S6(r1, r2, r4, r0, r3); store_and_load_keys(r4, r3, r2, r0, 16, 12);
+ S7(r4, r3, r2, r0, r1); store_and_load_keys(r1, r2, r0, r4, 12, 8);
+ S0(r1, r2, r0, r4, r3); store_and_load_keys(r0, r2, r4, r1, 8, 4);
+ S1(r0, r2, r4, r1, r3); store_and_load_keys(r3, r4, r1, r0, 4, 0);
+ S2(r3, r4, r1, r0, r2); store_and_load_keys(r2, r4, r3, r0, 0, -4);
+ S3(r2, r4, r3, r0, r1); store_and_load_keys(r0, r1, r4, r2, -4, -8);
+ S4(r0, r1, r4, r2, r3); store_and_load_keys(r1, r4, r2, r3, -8, -12);
+ S5(r1, r4, r2, r3, r0); store_and_load_keys(r0, r1, r4, r3, -12, -16);
+ S6(r0, r1, r4, r3, r2); store_and_load_keys(r4, r2, r1, r3, -16, -20);
+ S7(r4, r2, r1, r3, r0); store_and_load_keys(r0, r1, r3, r4, -20, -24);
+ S0(r0, r1, r3, r4, r2); store_and_load_keys(r3, r1, r4, r0, -24, -28);
+ k -= 50;
+ S1(r3, r1, r4, r0, r2); store_and_load_keys(r2, r4, r0, r3, 22, 18);
+ S2(r2, r4, r0, r3, r1); store_and_load_keys(r1, r4, r2, r3, 18, 14);
+ S3(r1, r4, r2, r3, r0); store_and_load_keys(r3, r0, r4, r1, 14, 10);
+ S4(r3, r0, r4, r1, r2); store_and_load_keys(r0, r4, r1, r2, 10, 6);
+ S5(r0, r4, r1, r2, r3); store_and_load_keys(r3, r0, r4, r2, 6, 2);
+ S6(r3, r0, r4, r2, r1); store_and_load_keys(r4, r1, r0, r2, 2, -2);
+ S7(r4, r1, r0, r2, r3); store_and_load_keys(r3, r0, r2, r4, -2, -6);
+ S0(r3, r0, r2, r4, r1); store_and_load_keys(r2, r0, r4, r3, -6, -10);
+ S1(r2, r0, r4, r3, r1); store_and_load_keys(r1, r4, r3, r2, -10, -14);
+ S2(r1, r4, r3, r2, r0); store_and_load_keys(r0, r4, r1, r2, -14, -18);
+ S3(r0, r4, r1, r2, r3); store_and_load_keys(r2, r3, r4, r0, -18, -22);
+ k -= 50;
+ S4(r2, r3, r4, r0, r1); store_and_load_keys(r3, r4, r0, r1, 28, 24);
+ S5(r3, r4, r0, r1, r2); store_and_load_keys(r2, r3, r4, r1, 24, 20);
+ S6(r2, r3, r4, r1, r0); store_and_load_keys(r4, r0, r3, r1, 20, 16);
+ S7(r4, r0, r3, r1, r2); store_and_load_keys(r2, r3, r1, r4, 16, 12);
+ S0(r2, r3, r1, r4, r0); store_and_load_keys(r1, r3, r4, r2, 12, 8);
+ S1(r1, r3, r4, r2, r0); store_and_load_keys(r0, r4, r2, r1, 8, 4);
+ S2(r0, r4, r2, r1, r3); store_and_load_keys(r3, r4, r0, r1, 4, 0);
+ S3(r3, r4, r0, r1, r2); storekeys(r1, r2, r4, r3, 0);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(__serpent_setkey);
+
+int serpent_setkey(struct crypto_tfm *tfm, const u8 *key, unsigned int keylen)
+{
+ return __serpent_setkey(crypto_tfm_ctx(tfm), key, keylen);
+}
+EXPORT_SYMBOL_GPL(serpent_setkey);
+
+void __serpent_encrypt(struct serpent_ctx *ctx, u8 *dst, const u8 *src)
+{
+ const u32 *k = ctx->expkey;
+ const __le32 *s = (const __le32 *)src;
+ __le32 *d = (__le32 *)dst;
+ u32 r0, r1, r2, r3, r4;
+
+/*
+ * Note: The conversions between u8* and u32* might cause trouble
+ * on architectures with stricter alignment rules than x86
+ */
+
+ r0 = le32_to_cpu(s[0]);
+ r1 = le32_to_cpu(s[1]);
+ r2 = le32_to_cpu(s[2]);
+ r3 = le32_to_cpu(s[3]);
+
+ K(r0, r1, r2, r3, 0);
+ S0(r0, r1, r2, r3, r4); LK(r2, r1, r3, r0, r4, 1);
+ S1(r2, r1, r3, r0, r4); LK(r4, r3, r0, r2, r1, 2);
+ S2(r4, r3, r0, r2, r1); LK(r1, r3, r4, r2, r0, 3);
+ S3(r1, r3, r4, r2, r0); LK(r2, r0, r3, r1, r4, 4);
+ S4(r2, r0, r3, r1, r4); LK(r0, r3, r1, r4, r2, 5);
+ S5(r0, r3, r1, r4, r2); LK(r2, r0, r3, r4, r1, 6);
+ S6(r2, r0, r3, r4, r1); LK(r3, r1, r0, r4, r2, 7);
+ S7(r3, r1, r0, r4, r2); LK(r2, r0, r4, r3, r1, 8);
+ S0(r2, r0, r4, r3, r1); LK(r4, r0, r3, r2, r1, 9);
+ S1(r4, r0, r3, r2, r1); LK(r1, r3, r2, r4, r0, 10);
+ S2(r1, r3, r2, r4, r0); LK(r0, r3, r1, r4, r2, 11);
+ S3(r0, r3, r1, r4, r2); LK(r4, r2, r3, r0, r1, 12);
+ S4(r4, r2, r3, r0, r1); LK(r2, r3, r0, r1, r4, 13);
+ S5(r2, r3, r0, r1, r4); LK(r4, r2, r3, r1, r0, 14);
+ S6(r4, r2, r3, r1, r0); LK(r3, r0, r2, r1, r4, 15);
+ S7(r3, r0, r2, r1, r4); LK(r4, r2, r1, r3, r0, 16);
+ S0(r4, r2, r1, r3, r0); LK(r1, r2, r3, r4, r0, 17);
+ S1(r1, r2, r3, r4, r0); LK(r0, r3, r4, r1, r2, 18);
+ S2(r0, r3, r4, r1, r2); LK(r2, r3, r0, r1, r4, 19);
+ S3(r2, r3, r0, r1, r4); LK(r1, r4, r3, r2, r0, 20);
+ S4(r1, r4, r3, r2, r0); LK(r4, r3, r2, r0, r1, 21);
+ S5(r4, r3, r2, r0, r1); LK(r1, r4, r3, r0, r2, 22);
+ S6(r1, r4, r3, r0, r2); LK(r3, r2, r4, r0, r1, 23);
+ S7(r3, r2, r4, r0, r1); LK(r1, r4, r0, r3, r2, 24);
+ S0(r1, r4, r0, r3, r2); LK(r0, r4, r3, r1, r2, 25);
+ S1(r0, r4, r3, r1, r2); LK(r2, r3, r1, r0, r4, 26);
+ S2(r2, r3, r1, r0, r4); LK(r4, r3, r2, r0, r1, 27);
+ S3(r4, r3, r2, r0, r1); LK(r0, r1, r3, r4, r2, 28);
+ S4(r0, r1, r3, r4, r2); LK(r1, r3, r4, r2, r0, 29);
+ S5(r1, r3, r4, r2, r0); LK(r0, r1, r3, r2, r4, 30);
+ S6(r0, r1, r3, r2, r4); LK(r3, r4, r1, r2, r0, 31);
+ S7(r3, r4, r1, r2, r0); K(r0, r1, r2, r3, 32);
+
+ d[0] = cpu_to_le32(r0);
+ d[1] = cpu_to_le32(r1);
+ d[2] = cpu_to_le32(r2);
+ d[3] = cpu_to_le32(r3);
+}
+EXPORT_SYMBOL_GPL(__serpent_encrypt);
+
+static void serpent_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
+{
+ struct serpent_ctx *ctx = crypto_tfm_ctx(tfm);
+
+ __serpent_encrypt(ctx, dst, src);
+}
+
+void __serpent_decrypt(struct serpent_ctx *ctx, u8 *dst, const u8 *src)
+{
+ const u32 *k = ctx->expkey;
+ const __le32 *s = (const __le32 *)src;
+ __le32 *d = (__le32 *)dst;
+ u32 r0, r1, r2, r3, r4;
+
+ r0 = le32_to_cpu(s[0]);
+ r1 = le32_to_cpu(s[1]);
+ r2 = le32_to_cpu(s[2]);
+ r3 = le32_to_cpu(s[3]);
+
+ K(r0, r1, r2, r3, 32);
+ SI7(r0, r1, r2, r3, r4); KL(r1, r3, r0, r4, r2, 31);
+ SI6(r1, r3, r0, r4, r2); KL(r0, r2, r4, r1, r3, 30);
+ SI5(r0, r2, r4, r1, r3); KL(r2, r3, r0, r4, r1, 29);
+ SI4(r2, r3, r0, r4, r1); KL(r2, r0, r1, r4, r3, 28);
+ SI3(r2, r0, r1, r4, r3); KL(r1, r2, r3, r4, r0, 27);
+ SI2(r1, r2, r3, r4, r0); KL(r2, r0, r4, r3, r1, 26);
+ SI1(r2, r0, r4, r3, r1); KL(r1, r0, r4, r3, r2, 25);
+ SI0(r1, r0, r4, r3, r2); KL(r4, r2, r0, r1, r3, 24);
+ SI7(r4, r2, r0, r1, r3); KL(r2, r1, r4, r3, r0, 23);
+ SI6(r2, r1, r4, r3, r0); KL(r4, r0, r3, r2, r1, 22);
+ SI5(r4, r0, r3, r2, r1); KL(r0, r1, r4, r3, r2, 21);
+ SI4(r0, r1, r4, r3, r2); KL(r0, r4, r2, r3, r1, 20);
+ SI3(r0, r4, r2, r3, r1); KL(r2, r0, r1, r3, r4, 19);
+ SI2(r2, r0, r1, r3, r4); KL(r0, r4, r3, r1, r2, 18);
+ SI1(r0, r4, r3, r1, r2); KL(r2, r4, r3, r1, r0, 17);
+ SI0(r2, r4, r3, r1, r0); KL(r3, r0, r4, r2, r1, 16);
+ SI7(r3, r0, r4, r2, r1); KL(r0, r2, r3, r1, r4, 15);
+ SI6(r0, r2, r3, r1, r4); KL(r3, r4, r1, r0, r2, 14);
+ SI5(r3, r4, r1, r0, r2); KL(r4, r2, r3, r1, r0, 13);
+ SI4(r4, r2, r3, r1, r0); KL(r4, r3, r0, r1, r2, 12);
+ SI3(r4, r3, r0, r1, r2); KL(r0, r4, r2, r1, r3, 11);
+ SI2(r0, r4, r2, r1, r3); KL(r4, r3, r1, r2, r0, 10);
+ SI1(r4, r3, r1, r2, r0); KL(r0, r3, r1, r2, r4, 9);
+ SI0(r0, r3, r1, r2, r4); KL(r1, r4, r3, r0, r2, 8);
+ SI7(r1, r4, r3, r0, r2); KL(r4, r0, r1, r2, r3, 7);
+ SI6(r4, r0, r1, r2, r3); KL(r1, r3, r2, r4, r0, 6);
+ SI5(r1, r3, r2, r4, r0); KL(r3, r0, r1, r2, r4, 5);
+ SI4(r3, r0, r1, r2, r4); KL(r3, r1, r4, r2, r0, 4);
+ SI3(r3, r1, r4, r2, r0); KL(r4, r3, r0, r2, r1, 3);
+ SI2(r4, r3, r0, r2, r1); KL(r3, r1, r2, r0, r4, 2);
+ SI1(r3, r1, r2, r0, r4); KL(r4, r1, r2, r0, r3, 1);
+ SI0(r4, r1, r2, r0, r3); K(r2, r3, r1, r4, 0);
+
+ d[0] = cpu_to_le32(r2);
+ d[1] = cpu_to_le32(r3);
+ d[2] = cpu_to_le32(r1);
+ d[3] = cpu_to_le32(r4);
+}
+EXPORT_SYMBOL_GPL(__serpent_decrypt);
+
+static void serpent_decrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
+{
+ struct serpent_ctx *ctx = crypto_tfm_ctx(tfm);
+
+ __serpent_decrypt(ctx, dst, src);
+}
+
+static struct crypto_alg serpent_alg = {
+ .cra_name = "serpent",
+ .cra_driver_name = "serpent-generic",
+ .cra_priority = 100,
+ .cra_flags = CRYPTO_ALG_TYPE_CIPHER,
+ .cra_blocksize = SERPENT_BLOCK_SIZE,
+ .cra_ctxsize = sizeof(struct serpent_ctx),
+ .cra_alignmask = 3,
+ .cra_module = THIS_MODULE,
+ .cra_list = LIST_HEAD_INIT(serpent_alg.cra_list),
+ .cra_u = { .cipher = {
+ .cia_min_keysize = SERPENT_MIN_KEY_SIZE,
+ .cia_max_keysize = SERPENT_MAX_KEY_SIZE,
+ .cia_setkey = serpent_setkey,
+ .cia_encrypt = serpent_encrypt,
+ .cia_decrypt = serpent_decrypt } }
+};
+
+static int tnepres_setkey(struct crypto_tfm *tfm, const u8 *key,
+ unsigned int keylen)
+{
+ u8 rev_key[SERPENT_MAX_KEY_SIZE];
+ int i;
+
+ for (i = 0; i < keylen; ++i)
+ rev_key[keylen - i - 1] = key[i];
+
+ return serpent_setkey(tfm, rev_key, keylen);
+}
+
+static void tnepres_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
+{
+ const u32 * const s = (const u32 * const)src;
+ u32 * const d = (u32 * const)dst;
+
+ u32 rs[4], rd[4];
+
+ rs[0] = swab32(s[3]);
+ rs[1] = swab32(s[2]);
+ rs[2] = swab32(s[1]);
+ rs[3] = swab32(s[0]);
+
+ serpent_encrypt(tfm, (u8 *)rd, (u8 *)rs);
+
+ d[0] = swab32(rd[3]);
+ d[1] = swab32(rd[2]);
+ d[2] = swab32(rd[1]);
+ d[3] = swab32(rd[0]);
+}
+
+static void tnepres_decrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
+{
+ const u32 * const s = (const u32 * const)src;
+ u32 * const d = (u32 * const)dst;
+
+ u32 rs[4], rd[4];
+
+ rs[0] = swab32(s[3]);
+ rs[1] = swab32(s[2]);
+ rs[2] = swab32(s[1]);
+ rs[3] = swab32(s[0]);
+
+ serpent_decrypt(tfm, (u8 *)rd, (u8 *)rs);
+
+ d[0] = swab32(rd[3]);
+ d[1] = swab32(rd[2]);
+ d[2] = swab32(rd[1]);
+ d[3] = swab32(rd[0]);
+}
+
+static struct crypto_alg tnepres_alg = {
+ .cra_name = "tnepres",
+ .cra_flags = CRYPTO_ALG_TYPE_CIPHER,
+ .cra_blocksize = SERPENT_BLOCK_SIZE,
+ .cra_ctxsize = sizeof(struct serpent_ctx),
+ .cra_alignmask = 3,
+ .cra_module = THIS_MODULE,
+ .cra_list = LIST_HEAD_INIT(serpent_alg.cra_list),
+ .cra_u = { .cipher = {
+ .cia_min_keysize = SERPENT_MIN_KEY_SIZE,
+ .cia_max_keysize = SERPENT_MAX_KEY_SIZE,
+ .cia_setkey = tnepres_setkey,
+ .cia_encrypt = tnepres_encrypt,
+ .cia_decrypt = tnepres_decrypt } }
+};
+
+static int __init serpent_mod_init(void)
+{
+ int ret = crypto_register_alg(&serpent_alg);
+
+ if (ret)
+ return ret;
+
+ ret = crypto_register_alg(&tnepres_alg);
+
+ if (ret)
+ crypto_unregister_alg(&serpent_alg);
+
+ return ret;
+}
+
+static void __exit serpent_mod_fini(void)
+{
+ crypto_unregister_alg(&tnepres_alg);
+ crypto_unregister_alg(&serpent_alg);
+}
+
+module_init(serpent_mod_init);
+module_exit(serpent_mod_fini);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Serpent and tnepres (kerneli compatible serpent reversed) Cipher Algorithm");
+MODULE_AUTHOR("Dag Arne Osvik <osvik@ii.uib.no>");
+MODULE_ALIAS("tnepres");
+MODULE_ALIAS("serpent");
projects / linux-flexiantxendom0-3.2.10.git / commitdiff