forked from rrcarlosr/Jetpack
671 lines
21 KiB
C
671 lines
21 KiB
C
/*
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* Cryptographic API.
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*
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* Serpent Cipher Algorithm.
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*
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* Copyright (C) 2002 Dag Arne Osvik <osvik@ii.uib.no>
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* 2003 Herbert Valerio Riedel <hvr@gnu.org>
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*
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* Added tnepres support:
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* Ruben Jesus Garcia Hernandez <ruben@ugr.es>, 18.10.2004
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* Based on code by hvr
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*/
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/errno.h>
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#include <asm/byteorder.h>
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#include <linux/crypto.h>
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#include <linux/types.h>
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#include <crypto/serpent.h>
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/* Key is padded to the maximum of 256 bits before round key generation.
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* Any key length <= 256 bits (32 bytes) is allowed by the algorithm.
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*/
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#define PHI 0x9e3779b9UL
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#define keyiter(a, b, c, d, i, j) \
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({ b ^= d; b ^= c; b ^= a; b ^= PHI ^ i; b = rol32(b, 11); k[j] = b; })
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#define loadkeys(x0, x1, x2, x3, i) \
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({ x0 = k[i]; x1 = k[i+1]; x2 = k[i+2]; x3 = k[i+3]; })
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#define storekeys(x0, x1, x2, x3, i) \
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({ k[i] = x0; k[i+1] = x1; k[i+2] = x2; k[i+3] = x3; })
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#define store_and_load_keys(x0, x1, x2, x3, s, l) \
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({ storekeys(x0, x1, x2, x3, s); loadkeys(x0, x1, x2, x3, l); })
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#define K(x0, x1, x2, x3, i) ({ \
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x3 ^= k[4*(i)+3]; x2 ^= k[4*(i)+2]; \
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x1 ^= k[4*(i)+1]; x0 ^= k[4*(i)+0]; \
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})
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#define LK(x0, x1, x2, x3, x4, i) ({ \
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x0 = rol32(x0, 13);\
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x2 = rol32(x2, 3); x1 ^= x0; x4 = x0 << 3; \
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x3 ^= x2; x1 ^= x2; \
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x1 = rol32(x1, 1); x3 ^= x4; \
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x3 = rol32(x3, 7); x4 = x1; \
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x0 ^= x1; x4 <<= 7; x2 ^= x3; \
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x0 ^= x3; x2 ^= x4; x3 ^= k[4*i+3]; \
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x1 ^= k[4*i+1]; x0 = rol32(x0, 5); x2 = rol32(x2, 22);\
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x0 ^= k[4*i+0]; x2 ^= k[4*i+2]; \
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})
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#define KL(x0, x1, x2, x3, x4, i) ({ \
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x0 ^= k[4*i+0]; x1 ^= k[4*i+1]; x2 ^= k[4*i+2]; \
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x3 ^= k[4*i+3]; x0 = ror32(x0, 5); x2 = ror32(x2, 22);\
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x4 = x1; x2 ^= x3; x0 ^= x3; \
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x4 <<= 7; x0 ^= x1; x1 = ror32(x1, 1); \
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x2 ^= x4; x3 = ror32(x3, 7); x4 = x0 << 3; \
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x1 ^= x0; x3 ^= x4; x0 = ror32(x0, 13);\
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x1 ^= x2; x3 ^= x2; x2 = ror32(x2, 3); \
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})
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#define S0(x0, x1, x2, x3, x4) ({ \
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x4 = x3; \
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x3 |= x0; x0 ^= x4; x4 ^= x2; \
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x4 = ~x4; x3 ^= x1; x1 &= x0; \
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x1 ^= x4; x2 ^= x0; x0 ^= x3; \
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x4 |= x0; x0 ^= x2; x2 &= x1; \
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x3 ^= x2; x1 = ~x1; x2 ^= x4; \
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x1 ^= x2; \
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})
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#define S1(x0, x1, x2, x3, x4) ({ \
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x4 = x1; \
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x1 ^= x0; x0 ^= x3; x3 = ~x3; \
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x4 &= x1; x0 |= x1; x3 ^= x2; \
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x0 ^= x3; x1 ^= x3; x3 ^= x4; \
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x1 |= x4; x4 ^= x2; x2 &= x0; \
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x2 ^= x1; x1 |= x0; x0 = ~x0; \
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x0 ^= x2; x4 ^= x1; \
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})
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#define S2(x0, x1, x2, x3, x4) ({ \
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x3 = ~x3; \
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x1 ^= x0; x4 = x0; x0 &= x2; \
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x0 ^= x3; x3 |= x4; x2 ^= x1; \
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x3 ^= x1; x1 &= x0; x0 ^= x2; \
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x2 &= x3; x3 |= x1; x0 = ~x0; \
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x3 ^= x0; x4 ^= x0; x0 ^= x2; \
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x1 |= x2; \
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})
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#define S3(x0, x1, x2, x3, x4) ({ \
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x4 = x1; \
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x1 ^= x3; x3 |= x0; x4 &= x0; \
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x0 ^= x2; x2 ^= x1; x1 &= x3; \
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x2 ^= x3; x0 |= x4; x4 ^= x3; \
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x1 ^= x0; x0 &= x3; x3 &= x4; \
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x3 ^= x2; x4 |= x1; x2 &= x1; \
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x4 ^= x3; x0 ^= x3; x3 ^= x2; \
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})
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#define S4(x0, x1, x2, x3, x4) ({ \
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x4 = x3; \
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x3 &= x0; x0 ^= x4; \
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x3 ^= x2; x2 |= x4; x0 ^= x1; \
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x4 ^= x3; x2 |= x0; \
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x2 ^= x1; x1 &= x0; \
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x1 ^= x4; x4 &= x2; x2 ^= x3; \
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x4 ^= x0; x3 |= x1; x1 = ~x1; \
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x3 ^= x0; \
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})
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#define S5(x0, x1, x2, x3, x4) ({ \
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x4 = x1; x1 |= x0; \
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x2 ^= x1; x3 = ~x3; x4 ^= x0; \
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x0 ^= x2; x1 &= x4; x4 |= x3; \
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x4 ^= x0; x0 &= x3; x1 ^= x3; \
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x3 ^= x2; x0 ^= x1; x2 &= x4; \
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x1 ^= x2; x2 &= x0; \
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x3 ^= x2; \
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})
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#define S6(x0, x1, x2, x3, x4) ({ \
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x4 = x1; \
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x3 ^= x0; x1 ^= x2; x2 ^= x0; \
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x0 &= x3; x1 |= x3; x4 = ~x4; \
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x0 ^= x1; x1 ^= x2; \
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x3 ^= x4; x4 ^= x0; x2 &= x0; \
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x4 ^= x1; x2 ^= x3; x3 &= x1; \
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x3 ^= x0; x1 ^= x2; \
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})
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#define S7(x0, x1, x2, x3, x4) ({ \
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x1 = ~x1; \
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x4 = x1; x0 = ~x0; x1 &= x2; \
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x1 ^= x3; x3 |= x4; x4 ^= x2; \
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x2 ^= x3; x3 ^= x0; x0 |= x1; \
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x2 &= x0; x0 ^= x4; x4 ^= x3; \
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x3 &= x0; x4 ^= x1; \
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x2 ^= x4; x3 ^= x1; x4 |= x0; \
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x4 ^= x1; \
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})
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#define SI0(x0, x1, x2, x3, x4) ({ \
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x4 = x3; x1 ^= x0; \
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x3 |= x1; x4 ^= x1; x0 = ~x0; \
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x2 ^= x3; x3 ^= x0; x0 &= x1; \
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x0 ^= x2; x2 &= x3; x3 ^= x4; \
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x2 ^= x3; x1 ^= x3; x3 &= x0; \
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x1 ^= x0; x0 ^= x2; x4 ^= x3; \
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})
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#define SI1(x0, x1, x2, x3, x4) ({ \
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x1 ^= x3; x4 = x0; \
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x0 ^= x2; x2 = ~x2; x4 |= x1; \
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x4 ^= x3; x3 &= x1; x1 ^= x2; \
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x2 &= x4; x4 ^= x1; x1 |= x3; \
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x3 ^= x0; x2 ^= x0; x0 |= x4; \
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x2 ^= x4; x1 ^= x0; \
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x4 ^= x1; \
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})
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#define SI2(x0, x1, x2, x3, x4) ({ \
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x2 ^= x1; x4 = x3; x3 = ~x3; \
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x3 |= x2; x2 ^= x4; x4 ^= x0; \
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x3 ^= x1; x1 |= x2; x2 ^= x0; \
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x1 ^= x4; x4 |= x3; x2 ^= x3; \
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x4 ^= x2; x2 &= x1; \
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x2 ^= x3; x3 ^= x4; x4 ^= x0; \
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})
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#define SI3(x0, x1, x2, x3, x4) ({ \
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x2 ^= x1; \
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x4 = x1; x1 &= x2; \
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x1 ^= x0; x0 |= x4; x4 ^= x3; \
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x0 ^= x3; x3 |= x1; x1 ^= x2; \
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x1 ^= x3; x0 ^= x2; x2 ^= x3; \
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x3 &= x1; x1 ^= x0; x0 &= x2; \
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x4 ^= x3; x3 ^= x0; x0 ^= x1; \
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})
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#define SI4(x0, x1, x2, x3, x4) ({ \
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x2 ^= x3; x4 = x0; x0 &= x1; \
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x0 ^= x2; x2 |= x3; x4 = ~x4; \
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x1 ^= x0; x0 ^= x2; x2 &= x4; \
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x2 ^= x0; x0 |= x4; \
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x0 ^= x3; x3 &= x2; \
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x4 ^= x3; x3 ^= x1; x1 &= x0; \
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x4 ^= x1; x0 ^= x3; \
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})
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#define SI5(x0, x1, x2, x3, x4) ({ \
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x4 = x1; x1 |= x2; \
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x2 ^= x4; x1 ^= x3; x3 &= x4; \
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x2 ^= x3; x3 |= x0; x0 = ~x0; \
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x3 ^= x2; x2 |= x0; x4 ^= x1; \
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x2 ^= x4; x4 &= x0; x0 ^= x1; \
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x1 ^= x3; x0 &= x2; x2 ^= x3; \
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x0 ^= x2; x2 ^= x4; x4 ^= x3; \
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})
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#define SI6(x0, x1, x2, x3, x4) ({ \
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x0 ^= x2; \
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x4 = x0; x0 &= x3; x2 ^= x3; \
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x0 ^= x2; x3 ^= x1; x2 |= x4; \
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x2 ^= x3; x3 &= x0; x0 = ~x0; \
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x3 ^= x1; x1 &= x2; x4 ^= x0; \
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x3 ^= x4; x4 ^= x2; x0 ^= x1; \
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x2 ^= x0; \
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})
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#define SI7(x0, x1, x2, x3, x4) ({ \
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x4 = x3; x3 &= x0; x0 ^= x2; \
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x2 |= x4; x4 ^= x1; x0 = ~x0; \
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x1 |= x3; x4 ^= x0; x0 &= x2; \
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x0 ^= x1; x1 &= x2; x3 ^= x2; \
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x4 ^= x3; x2 &= x3; x3 |= x0; \
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x1 ^= x4; x3 ^= x4; x4 &= x0; \
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x4 ^= x2; \
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})
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int __serpent_setkey(struct serpent_ctx *ctx, const u8 *key,
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unsigned int keylen)
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{
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u32 *k = ctx->expkey;
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u8 *k8 = (u8 *)k;
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u32 r0, r1, r2, r3, r4;
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int i;
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/* Copy key, add padding */
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for (i = 0; i < keylen; ++i)
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k8[i] = key[i];
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if (i < SERPENT_MAX_KEY_SIZE)
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k8[i++] = 1;
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while (i < SERPENT_MAX_KEY_SIZE)
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k8[i++] = 0;
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/* Expand key using polynomial */
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r0 = le32_to_cpu(k[3]);
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r1 = le32_to_cpu(k[4]);
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r2 = le32_to_cpu(k[5]);
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r3 = le32_to_cpu(k[6]);
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r4 = le32_to_cpu(k[7]);
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keyiter(le32_to_cpu(k[0]), r0, r4, r2, 0, 0);
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keyiter(le32_to_cpu(k[1]), r1, r0, r3, 1, 1);
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keyiter(le32_to_cpu(k[2]), r2, r1, r4, 2, 2);
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keyiter(le32_to_cpu(k[3]), r3, r2, r0, 3, 3);
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keyiter(le32_to_cpu(k[4]), r4, r3, r1, 4, 4);
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keyiter(le32_to_cpu(k[5]), r0, r4, r2, 5, 5);
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keyiter(le32_to_cpu(k[6]), r1, r0, r3, 6, 6);
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keyiter(le32_to_cpu(k[7]), r2, r1, r4, 7, 7);
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keyiter(k[0], r3, r2, r0, 8, 8);
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keyiter(k[1], r4, r3, r1, 9, 9);
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keyiter(k[2], r0, r4, r2, 10, 10);
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keyiter(k[3], r1, r0, r3, 11, 11);
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keyiter(k[4], r2, r1, r4, 12, 12);
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keyiter(k[5], r3, r2, r0, 13, 13);
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keyiter(k[6], r4, r3, r1, 14, 14);
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keyiter(k[7], r0, r4, r2, 15, 15);
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keyiter(k[8], r1, r0, r3, 16, 16);
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keyiter(k[9], r2, r1, r4, 17, 17);
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keyiter(k[10], r3, r2, r0, 18, 18);
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keyiter(k[11], r4, r3, r1, 19, 19);
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keyiter(k[12], r0, r4, r2, 20, 20);
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keyiter(k[13], r1, r0, r3, 21, 21);
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keyiter(k[14], r2, r1, r4, 22, 22);
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keyiter(k[15], r3, r2, r0, 23, 23);
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keyiter(k[16], r4, r3, r1, 24, 24);
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keyiter(k[17], r0, r4, r2, 25, 25);
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keyiter(k[18], r1, r0, r3, 26, 26);
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keyiter(k[19], r2, r1, r4, 27, 27);
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keyiter(k[20], r3, r2, r0, 28, 28);
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keyiter(k[21], r4, r3, r1, 29, 29);
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keyiter(k[22], r0, r4, r2, 30, 30);
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keyiter(k[23], r1, r0, r3, 31, 31);
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k += 50;
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keyiter(k[-26], r2, r1, r4, 32, -18);
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keyiter(k[-25], r3, r2, r0, 33, -17);
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keyiter(k[-24], r4, r3, r1, 34, -16);
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keyiter(k[-23], r0, r4, r2, 35, -15);
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keyiter(k[-22], r1, r0, r3, 36, -14);
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keyiter(k[-21], r2, r1, r4, 37, -13);
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keyiter(k[-20], r3, r2, r0, 38, -12);
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keyiter(k[-19], r4, r3, r1, 39, -11);
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keyiter(k[-18], r0, r4, r2, 40, -10);
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keyiter(k[-17], r1, r0, r3, 41, -9);
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keyiter(k[-16], r2, r1, r4, 42, -8);
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keyiter(k[-15], r3, r2, r0, 43, -7);
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keyiter(k[-14], r4, r3, r1, 44, -6);
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keyiter(k[-13], r0, r4, r2, 45, -5);
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keyiter(k[-12], r1, r0, r3, 46, -4);
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keyiter(k[-11], r2, r1, r4, 47, -3);
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keyiter(k[-10], r3, r2, r0, 48, -2);
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keyiter(k[-9], r4, r3, r1, 49, -1);
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keyiter(k[-8], r0, r4, r2, 50, 0);
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keyiter(k[-7], r1, r0, r3, 51, 1);
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keyiter(k[-6], r2, r1, r4, 52, 2);
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keyiter(k[-5], r3, r2, r0, 53, 3);
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keyiter(k[-4], r4, r3, r1, 54, 4);
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keyiter(k[-3], r0, r4, r2, 55, 5);
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keyiter(k[-2], r1, r0, r3, 56, 6);
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keyiter(k[-1], r2, r1, r4, 57, 7);
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keyiter(k[0], r3, r2, r0, 58, 8);
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keyiter(k[1], r4, r3, r1, 59, 9);
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keyiter(k[2], r0, r4, r2, 60, 10);
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keyiter(k[3], r1, r0, r3, 61, 11);
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keyiter(k[4], r2, r1, r4, 62, 12);
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keyiter(k[5], r3, r2, r0, 63, 13);
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keyiter(k[6], r4, r3, r1, 64, 14);
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keyiter(k[7], r0, r4, r2, 65, 15);
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keyiter(k[8], r1, r0, r3, 66, 16);
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keyiter(k[9], r2, r1, r4, 67, 17);
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keyiter(k[10], r3, r2, r0, 68, 18);
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keyiter(k[11], r4, r3, r1, 69, 19);
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keyiter(k[12], r0, r4, r2, 70, 20);
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keyiter(k[13], r1, r0, r3, 71, 21);
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keyiter(k[14], r2, r1, r4, 72, 22);
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keyiter(k[15], r3, r2, r0, 73, 23);
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keyiter(k[16], r4, r3, r1, 74, 24);
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keyiter(k[17], r0, r4, r2, 75, 25);
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keyiter(k[18], r1, r0, r3, 76, 26);
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keyiter(k[19], r2, r1, r4, 77, 27);
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keyiter(k[20], r3, r2, r0, 78, 28);
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keyiter(k[21], r4, r3, r1, 79, 29);
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keyiter(k[22], r0, r4, r2, 80, 30);
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keyiter(k[23], r1, r0, r3, 81, 31);
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k += 50;
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keyiter(k[-26], r2, r1, r4, 82, -18);
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keyiter(k[-25], r3, r2, r0, 83, -17);
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keyiter(k[-24], r4, r3, r1, 84, -16);
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keyiter(k[-23], r0, r4, r2, 85, -15);
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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 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 srp_algs[2] = { {
|
|
.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_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 } }
|
|
}, {
|
|
.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_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)
|
|
{
|
|
return crypto_register_algs(srp_algs, ARRAY_SIZE(srp_algs));
|
|
}
|
|
|
|
static void __exit serpent_mod_fini(void)
|
|
{
|
|
crypto_unregister_algs(srp_algs, ARRAY_SIZE(srp_algs));
|
|
}
|
|
|
|
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_CRYPTO("tnepres");
|
|
MODULE_ALIAS_CRYPTO("serpent");
|
|
MODULE_ALIAS_CRYPTO("serpent-generic");
|