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marcus.erl |
/*
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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: 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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/* 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 SERPENT_MIN_KEY_SIZE 0
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#define SERPENT_MAX_KEY_SIZE 32
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#define SERPENT_EXPKEY_WORDS 132
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#define SERPENT_BLOCK_SIZE 16
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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 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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#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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#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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#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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#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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#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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#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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#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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#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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#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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#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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#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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#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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#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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#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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#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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#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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#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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#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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| 213 |
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struct serpent_ctx {
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u32 expkey[SERPENT_EXPKEY_WORDS];
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};
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| 217 |
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| 218 |
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static int serpent_setkey(struct crypto_tfm *tfm, const u8 *key,
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unsigned int keylen)
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{
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| 221 |
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struct serpent_ctx *ctx = crypto_tfm_ctx(tfm);
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u32 *k = ctx->expkey;
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| 223 |
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u8 *k8 = (u8 *)k;
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| 224 |
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u32 r0,r1,r2,r3,r4;
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| 225 |
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int i;
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| 226 |
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| 227 |
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/* Copy key, add padding */
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| 228 |
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| 229 |
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for (i = 0; i < keylen; ++i)
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| 230 |
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k8[i] = key[i];
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| 231 |
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if (i < SERPENT_MAX_KEY_SIZE)
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k8[i++] = 1;
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| 233 |
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while (i < SERPENT_MAX_KEY_SIZE)
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| 234 |
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k8[i++] = 0;
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| 235 |
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| 236 |
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/* Expand key using polynomial */
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| 237 |
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| 238 |
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r0 = le32_to_cpu(k[3]);
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| 239 |
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r1 = le32_to_cpu(k[4]);
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| 240 |
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r2 = le32_to_cpu(k[5]);
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| 241 |
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r3 = le32_to_cpu(k[6]);
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| 242 |
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r4 = le32_to_cpu(k[7]);
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| 243 |
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| 244 |
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keyiter(le32_to_cpu(k[0]),r0,r4,r2,0,0);
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| 245 |
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keyiter(le32_to_cpu(k[1]),r1,r0,r3,1,1);
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| 246 |
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keyiter(le32_to_cpu(k[2]),r2,r1,r4,2,2);
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| 247 |
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keyiter(le32_to_cpu(k[3]),r3,r2,r0,3,3);
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| 248 |
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keyiter(le32_to_cpu(k[4]),r4,r3,r1,4,4);
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| 249 |
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keyiter(le32_to_cpu(k[5]),r0,r4,r2,5,5);
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| 250 |
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keyiter(le32_to_cpu(k[6]),r1,r0,r3,6,6);
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| 251 |
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keyiter(le32_to_cpu(k[7]),r2,r1,r4,7,7);
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| 252 |
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| 253 |
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keyiter(k[ 0],r3,r2,r0, 8, 8); keyiter(k[ 1],r4,r3,r1, 9, 9);
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| 254 |
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keyiter(k[ 2],r0,r4,r2, 10, 10); keyiter(k[ 3],r1,r0,r3, 11, 11);
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| 255 |
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keyiter(k[ 4],r2,r1,r4, 12, 12); keyiter(k[ 5],r3,r2,r0, 13, 13);
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| 256 |
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keyiter(k[ 6],r4,r3,r1, 14, 14); keyiter(k[ 7],r0,r4,r2, 15, 15);
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| 257 |
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keyiter(k[ 8],r1,r0,r3, 16, 16); keyiter(k[ 9],r2,r1,r4, 17, 17);
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| 258 |
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keyiter(k[ 10],r3,r2,r0, 18, 18); keyiter(k[ 11],r4,r3,r1, 19, 19);
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| 259 |
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keyiter(k[ 12],r0,r4,r2, 20, 20); keyiter(k[ 13],r1,r0,r3, 21, 21);
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| 260 |
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keyiter(k[ 14],r2,r1,r4, 22, 22); keyiter(k[ 15],r3,r2,r0, 23, 23);
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| 261 |
|
|
keyiter(k[ 16],r4,r3,r1, 24, 24); keyiter(k[ 17],r0,r4,r2, 25, 25);
|
| 262 |
|
|
keyiter(k[ 18],r1,r0,r3, 26, 26); keyiter(k[ 19],r2,r1,r4, 27, 27);
|
| 263 |
|
|
keyiter(k[ 20],r3,r2,r0, 28, 28); keyiter(k[ 21],r4,r3,r1, 29, 29);
|
| 264 |
|
|
keyiter(k[ 22],r0,r4,r2, 30, 30); keyiter(k[ 23],r1,r0,r3, 31, 31);
|
| 265 |
|
|
|
| 266 |
|
|
k += 50;
|
| 267 |
|
|
|
| 268 |
|
|
keyiter(k[-26],r2,r1,r4, 32,-18); keyiter(k[-25],r3,r2,r0, 33,-17);
|
| 269 |
|
|
keyiter(k[-24],r4,r3,r1, 34,-16); keyiter(k[-23],r0,r4,r2, 35,-15);
|
| 270 |
|
|
keyiter(k[-22],r1,r0,r3, 36,-14); keyiter(k[-21],r2,r1,r4, 37,-13);
|
| 271 |
|
|
keyiter(k[-20],r3,r2,r0, 38,-12); keyiter(k[-19],r4,r3,r1, 39,-11);
|
| 272 |
|
|
keyiter(k[-18],r0,r4,r2, 40,-10); keyiter(k[-17],r1,r0,r3, 41, -9);
|
| 273 |
|
|
keyiter(k[-16],r2,r1,r4, 42, -8); keyiter(k[-15],r3,r2,r0, 43, -7);
|
| 274 |
|
|
keyiter(k[-14],r4,r3,r1, 44, -6); keyiter(k[-13],r0,r4,r2, 45, -5);
|
| 275 |
|
|
keyiter(k[-12],r1,r0,r3, 46, -4); keyiter(k[-11],r2,r1,r4, 47, -3);
|
| 276 |
|
|
keyiter(k[-10],r3,r2,r0, 48, -2); keyiter(k[ -9],r4,r3,r1, 49, -1);
|
| 277 |
|
|
keyiter(k[ -8],r0,r4,r2, 50, 0); keyiter(k[ -7],r1,r0,r3, 51, 1);
|
| 278 |
|
|
keyiter(k[ -6],r2,r1,r4, 52, 2); keyiter(k[ -5],r3,r2,r0, 53, 3);
|
| 279 |
|
|
keyiter(k[ -4],r4,r3,r1, 54, 4); keyiter(k[ -3],r0,r4,r2, 55, 5);
|
| 280 |
|
|
keyiter(k[ -2],r1,r0,r3, 56, 6); keyiter(k[ -1],r2,r1,r4, 57, 7);
|
| 281 |
|
|
keyiter(k[ 0],r3,r2,r0, 58, 8); keyiter(k[ 1],r4,r3,r1, 59, 9);
|
| 282 |
|
|
keyiter(k[ 2],r0,r4,r2, 60, 10); keyiter(k[ 3],r1,r0,r3, 61, 11);
|
| 283 |
|
|
keyiter(k[ 4],r2,r1,r4, 62, 12); keyiter(k[ 5],r3,r2,r0, 63, 13);
|
| 284 |
|
|
keyiter(k[ 6],r4,r3,r1, 64, 14); keyiter(k[ 7],r0,r4,r2, 65, 15);
|
| 285 |
|
|
keyiter(k[ 8],r1,r0,r3, 66, 16); keyiter(k[ 9],r2,r1,r4, 67, 17);
|
| 286 |
|
|
keyiter(k[ 10],r3,r2,r0, 68, 18); keyiter(k[ 11],r4,r3,r1, 69, 19);
|
| 287 |
|
|
keyiter(k[ 12],r0,r4,r2, 70, 20); keyiter(k[ 13],r1,r0,r3, 71, 21);
|
| 288 |
|
|
keyiter(k[ 14],r2,r1,r4, 72, 22); keyiter(k[ 15],r3,r2,r0, 73, 23);
|
| 289 |
|
|
keyiter(k[ 16],r4,r3,r1, 74, 24); keyiter(k[ 17],r0,r4,r2, 75, 25);
|
| 290 |
|
|
keyiter(k[ 18],r1,r0,r3, 76, 26); keyiter(k[ 19],r2,r1,r4, 77, 27);
|
| 291 |
|
|
keyiter(k[ 20],r3,r2,r0, 78, 28); keyiter(k[ 21],r4,r3,r1, 79, 29);
|
| 292 |
|
|
keyiter(k[ 22],r0,r4,r2, 80, 30); keyiter(k[ 23],r1,r0,r3, 81, 31);
|
| 293 |
|
|
|
| 294 |
|
|
k += 50;
|
| 295 |
|
|
|
| 296 |
|
|
keyiter(k[-26],r2,r1,r4, 82,-18); keyiter(k[-25],r3,r2,r0, 83,-17);
|
| 297 |
|
|
keyiter(k[-24],r4,r3,r1, 84,-16); keyiter(k[-23],r0,r4,r2, 85,-15);
|
| 298 |
|
|
keyiter(k[-22],r1,r0,r3, 86,-14); keyiter(k[-21],r2,r1,r4, 87,-13);
|
| 299 |
|
|
keyiter(k[-20],r3,r2,r0, 88,-12); keyiter(k[-19],r4,r3,r1, 89,-11);
|
| 300 |
|
|
keyiter(k[-18],r0,r4,r2, 90,-10); keyiter(k[-17],r1,r0,r3, 91, -9);
|
| 301 |
|
|
keyiter(k[-16],r2,r1,r4, 92, -8); keyiter(k[-15],r3,r2,r0, 93, -7);
|
| 302 |
|
|
keyiter(k[-14],r4,r3,r1, 94, -6); keyiter(k[-13],r0,r4,r2, 95, -5);
|
| 303 |
|
|
keyiter(k[-12],r1,r0,r3, 96, -4); keyiter(k[-11],r2,r1,r4, 97, -3);
|
| 304 |
|
|
keyiter(k[-10],r3,r2,r0, 98, -2); keyiter(k[ -9],r4,r3,r1, 99, -1);
|
| 305 |
|
|
keyiter(k[ -8],r0,r4,r2,100, 0); keyiter(k[ -7],r1,r0,r3,101, 1);
|
| 306 |
|
|
keyiter(k[ -6],r2,r1,r4,102, 2); keyiter(k[ -5],r3,r2,r0,103, 3);
|
| 307 |
|
|
keyiter(k[ -4],r4,r3,r1,104, 4); keyiter(k[ -3],r0,r4,r2,105, 5);
|
| 308 |
|
|
keyiter(k[ -2],r1,r0,r3,106, 6); keyiter(k[ -1],r2,r1,r4,107, 7);
|
| 309 |
|
|
keyiter(k[ 0],r3,r2,r0,108, 8); keyiter(k[ 1],r4,r3,r1,109, 9);
|
| 310 |
|
|
keyiter(k[ 2],r0,r4,r2,110, 10); keyiter(k[ 3],r1,r0,r3,111, 11);
|
| 311 |
|
|
keyiter(k[ 4],r2,r1,r4,112, 12); keyiter(k[ 5],r3,r2,r0,113, 13);
|
| 312 |
|
|
keyiter(k[ 6],r4,r3,r1,114, 14); keyiter(k[ 7],r0,r4,r2,115, 15);
|
| 313 |
|
|
keyiter(k[ 8],r1,r0,r3,116, 16); keyiter(k[ 9],r2,r1,r4,117, 17);
|
| 314 |
|
|
keyiter(k[ 10],r3,r2,r0,118, 18); keyiter(k[ 11],r4,r3,r1,119, 19);
|
| 315 |
|
|
keyiter(k[ 12],r0,r4,r2,120, 20); keyiter(k[ 13],r1,r0,r3,121, 21);
|
| 316 |
|
|
keyiter(k[ 14],r2,r1,r4,122, 22); keyiter(k[ 15],r3,r2,r0,123, 23);
|
| 317 |
|
|
keyiter(k[ 16],r4,r3,r1,124, 24); keyiter(k[ 17],r0,r4,r2,125, 25);
|
| 318 |
|
|
keyiter(k[ 18],r1,r0,r3,126, 26); keyiter(k[ 19],r2,r1,r4,127, 27);
|
| 319 |
|
|
keyiter(k[ 20],r3,r2,r0,128, 28); keyiter(k[ 21],r4,r3,r1,129, 29);
|
| 320 |
|
|
keyiter(k[ 22],r0,r4,r2,130, 30); keyiter(k[ 23],r1,r0,r3,131, 31);
|
| 321 |
|
|
|
| 322 |
|
|
/* Apply S-boxes */
|
| 323 |
|
|
|
| 324 |
|
|
S3(r3,r4,r0,r1,r2); storekeys(r1,r2,r4,r3, 28); loadkeys(r1,r2,r4,r3, 24);
|
| 325 |
|
|
S4(r1,r2,r4,r3,r0); storekeys(r2,r4,r3,r0, 24); loadkeys(r2,r4,r3,r0, 20);
|
| 326 |
|
|
S5(r2,r4,r3,r0,r1); storekeys(r1,r2,r4,r0, 20); loadkeys(r1,r2,r4,r0, 16);
|
| 327 |
|
|
S6(r1,r2,r4,r0,r3); storekeys(r4,r3,r2,r0, 16); loadkeys(r4,r3,r2,r0, 12);
|
| 328 |
|
|
S7(r4,r3,r2,r0,r1); storekeys(r1,r2,r0,r4, 12); loadkeys(r1,r2,r0,r4, 8);
|
| 329 |
|
|
S0(r1,r2,r0,r4,r3); storekeys(r0,r2,r4,r1, 8); loadkeys(r0,r2,r4,r1, 4);
|
| 330 |
|
|
S1(r0,r2,r4,r1,r3); storekeys(r3,r4,r1,r0, 4); loadkeys(r3,r4,r1,r0, 0);
|
| 331 |
|
|
S2(r3,r4,r1,r0,r2); storekeys(r2,r4,r3,r0, 0); loadkeys(r2,r4,r3,r0, -4);
|
| 332 |
|
|
S3(r2,r4,r3,r0,r1); storekeys(r0,r1,r4,r2, -4); loadkeys(r0,r1,r4,r2, -8);
|
| 333 |
|
|
S4(r0,r1,r4,r2,r3); storekeys(r1,r4,r2,r3, -8); loadkeys(r1,r4,r2,r3,-12);
|
| 334 |
|
|
S5(r1,r4,r2,r3,r0); storekeys(r0,r1,r4,r3,-12); loadkeys(r0,r1,r4,r3,-16);
|
| 335 |
|
|
S6(r0,r1,r4,r3,r2); storekeys(r4,r2,r1,r3,-16); loadkeys(r4,r2,r1,r3,-20);
|
| 336 |
|
|
S7(r4,r2,r1,r3,r0); storekeys(r0,r1,r3,r4,-20); loadkeys(r0,r1,r3,r4,-24);
|
| 337 |
|
|
S0(r0,r1,r3,r4,r2); storekeys(r3,r1,r4,r0,-24); loadkeys(r3,r1,r4,r0,-28);
|
| 338 |
|
|
k -= 50;
|
| 339 |
|
|
S1(r3,r1,r4,r0,r2); storekeys(r2,r4,r0,r3, 22); loadkeys(r2,r4,r0,r3, 18);
|
| 340 |
|
|
S2(r2,r4,r0,r3,r1); storekeys(r1,r4,r2,r3, 18); loadkeys(r1,r4,r2,r3, 14);
|
| 341 |
|
|
S3(r1,r4,r2,r3,r0); storekeys(r3,r0,r4,r1, 14); loadkeys(r3,r0,r4,r1, 10);
|
| 342 |
|
|
S4(r3,r0,r4,r1,r2); storekeys(r0,r4,r1,r2, 10); loadkeys(r0,r4,r1,r2, 6);
|
| 343 |
|
|
S5(r0,r4,r1,r2,r3); storekeys(r3,r0,r4,r2, 6); loadkeys(r3,r0,r4,r2, 2);
|
| 344 |
|
|
S6(r3,r0,r4,r2,r1); storekeys(r4,r1,r0,r2, 2); loadkeys(r4,r1,r0,r2, -2);
|
| 345 |
|
|
S7(r4,r1,r0,r2,r3); storekeys(r3,r0,r2,r4, -2); loadkeys(r3,r0,r2,r4, -6);
|
| 346 |
|
|
S0(r3,r0,r2,r4,r1); storekeys(r2,r0,r4,r3, -6); loadkeys(r2,r0,r4,r3,-10);
|
| 347 |
|
|
S1(r2,r0,r4,r3,r1); storekeys(r1,r4,r3,r2,-10); loadkeys(r1,r4,r3,r2,-14);
|
| 348 |
|
|
S2(r1,r4,r3,r2,r0); storekeys(r0,r4,r1,r2,-14); loadkeys(r0,r4,r1,r2,-18);
|
| 349 |
|
|
S3(r0,r4,r1,r2,r3); storekeys(r2,r3,r4,r0,-18); loadkeys(r2,r3,r4,r0,-22);
|
| 350 |
|
|
k -= 50;
|
| 351 |
|
|
S4(r2,r3,r4,r0,r1); storekeys(r3,r4,r0,r1, 28); loadkeys(r3,r4,r0,r1, 24);
|
| 352 |
|
|
S5(r3,r4,r0,r1,r2); storekeys(r2,r3,r4,r1, 24); loadkeys(r2,r3,r4,r1, 20);
|
| 353 |
|
|
S6(r2,r3,r4,r1,r0); storekeys(r4,r0,r3,r1, 20); loadkeys(r4,r0,r3,r1, 16);
|
| 354 |
|
|
S7(r4,r0,r3,r1,r2); storekeys(r2,r3,r1,r4, 16); loadkeys(r2,r3,r1,r4, 12);
|
| 355 |
|
|
S0(r2,r3,r1,r4,r0); storekeys(r1,r3,r4,r2, 12); loadkeys(r1,r3,r4,r2, 8);
|
| 356 |
|
|
S1(r1,r3,r4,r2,r0); storekeys(r0,r4,r2,r1, 8); loadkeys(r0,r4,r2,r1, 4);
|
| 357 |
|
|
S2(r0,r4,r2,r1,r3); storekeys(r3,r4,r0,r1, 4); loadkeys(r3,r4,r0,r1, 0);
|
| 358 |
|
|
S3(r3,r4,r0,r1,r2); storekeys(r1,r2,r4,r3, 0);
|
| 359 |
|
|
|
| 360 |
|
|
return 0;
|
| 361 |
|
|
}
|
| 362 |
|
|
|
| 363 |
|
|
static void serpent_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
|
| 364 |
|
|
{
|
| 365 |
|
|
struct serpent_ctx *ctx = crypto_tfm_ctx(tfm);
|
| 366 |
|
|
const u32
|
| 367 |
|
|
*k = ctx->expkey;
|
| 368 |
|
|
const __le32 *s = (const __le32 *)src;
|
| 369 |
|
|
__le32 *d = (__le32 *)dst;
|
| 370 |
|
|
u32 r0, r1, r2, r3, r4;
|
| 371 |
|
|
|
| 372 |
|
|
/*
|
| 373 |
|
|
* Note: The conversions between u8* and u32* might cause trouble
|
| 374 |
|
|
* on architectures with stricter alignment rules than x86
|
| 375 |
|
|
*/
|
| 376 |
|
|
|
| 377 |
|
|
r0 = le32_to_cpu(s[0]);
|
| 378 |
|
|
r1 = le32_to_cpu(s[1]);
|
| 379 |
|
|
r2 = le32_to_cpu(s[2]);
|
| 380 |
|
|
r3 = le32_to_cpu(s[3]);
|
| 381 |
|
|
|
| 382 |
|
|
K(r0,r1,r2,r3,0);
|
| 383 |
|
|
S0(r0,r1,r2,r3,r4); LK(r2,r1,r3,r0,r4,1);
|
| 384 |
|
|
S1(r2,r1,r3,r0,r4); LK(r4,r3,r0,r2,r1,2);
|
| 385 |
|
|
S2(r4,r3,r0,r2,r1); LK(r1,r3,r4,r2,r0,3);
|
| 386 |
|
|
S3(r1,r3,r4,r2,r0); LK(r2,r0,r3,r1,r4,4);
|
| 387 |
|
|
S4(r2,r0,r3,r1,r4); LK(r0,r3,r1,r4,r2,5);
|
| 388 |
|
|
S5(r0,r3,r1,r4,r2); LK(r2,r0,r3,r4,r1,6);
|
| 389 |
|
|
S6(r2,r0,r3,r4,r1); LK(r3,r1,r0,r4,r2,7);
|
| 390 |
|
|
S7(r3,r1,r0,r4,r2); LK(r2,r0,r4,r3,r1,8);
|
| 391 |
|
|
S0(r2,r0,r4,r3,r1); LK(r4,r0,r3,r2,r1,9);
|
| 392 |
|
|
S1(r4,r0,r3,r2,r1); LK(r1,r3,r2,r4,r0,10);
|
| 393 |
|
|
S2(r1,r3,r2,r4,r0); LK(r0,r3,r1,r4,r2,11);
|
| 394 |
|
|
S3(r0,r3,r1,r4,r2); LK(r4,r2,r3,r0,r1,12);
|
| 395 |
|
|
S4(r4,r2,r3,r0,r1); LK(r2,r3,r0,r1,r4,13);
|
| 396 |
|
|
S5(r2,r3,r0,r1,r4); LK(r4,r2,r3,r1,r0,14);
|
| 397 |
|
|
S6(r4,r2,r3,r1,r0); LK(r3,r0,r2,r1,r4,15);
|
| 398 |
|
|
S7(r3,r0,r2,r1,r4); LK(r4,r2,r1,r3,r0,16);
|
| 399 |
|
|
S0(r4,r2,r1,r3,r0); LK(r1,r2,r3,r4,r0,17);
|
| 400 |
|
|
S1(r1,r2,r3,r4,r0); LK(r0,r3,r4,r1,r2,18);
|
| 401 |
|
|
S2(r0,r3,r4,r1,r2); LK(r2,r3,r0,r1,r4,19);
|
| 402 |
|
|
S3(r2,r3,r0,r1,r4); LK(r1,r4,r3,r2,r0,20);
|
| 403 |
|
|
S4(r1,r4,r3,r2,r0); LK(r4,r3,r2,r0,r1,21);
|
| 404 |
|
|
S5(r4,r3,r2,r0,r1); LK(r1,r4,r3,r0,r2,22);
|
| 405 |
|
|
S6(r1,r4,r3,r0,r2); LK(r3,r2,r4,r0,r1,23);
|
| 406 |
|
|
S7(r3,r2,r4,r0,r1); LK(r1,r4,r0,r3,r2,24);
|
| 407 |
|
|
S0(r1,r4,r0,r3,r2); LK(r0,r4,r3,r1,r2,25);
|
| 408 |
|
|
S1(r0,r4,r3,r1,r2); LK(r2,r3,r1,r0,r4,26);
|
| 409 |
|
|
S2(r2,r3,r1,r0,r4); LK(r4,r3,r2,r0,r1,27);
|
| 410 |
|
|
S3(r4,r3,r2,r0,r1); LK(r0,r1,r3,r4,r2,28);
|
| 411 |
|
|
S4(r0,r1,r3,r4,r2); LK(r1,r3,r4,r2,r0,29);
|
| 412 |
|
|
S5(r1,r3,r4,r2,r0); LK(r0,r1,r3,r2,r4,30);
|
| 413 |
|
|
S6(r0,r1,r3,r2,r4); LK(r3,r4,r1,r2,r0,31);
|
| 414 |
|
|
S7(r3,r4,r1,r2,r0); K(r0,r1,r2,r3,32);
|
| 415 |
|
|
|
| 416 |
|
|
d[0] = cpu_to_le32(r0);
|
| 417 |
|
|
d[1] = cpu_to_le32(r1);
|
| 418 |
|
|
d[2] = cpu_to_le32(r2);
|
| 419 |
|
|
d[3] = cpu_to_le32(r3);
|
| 420 |
|
|
}
|
| 421 |
|
|
|
| 422 |
|
|
static void serpent_decrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
|
| 423 |
|
|
{
|
| 424 |
|
|
struct serpent_ctx *ctx = crypto_tfm_ctx(tfm);
|
| 425 |
|
|
const u32
|
| 426 |
|
|
*k = ((struct serpent_ctx *)ctx)->expkey;
|
| 427 |
|
|
const __le32 *s = (const __le32 *)src;
|
| 428 |
|
|
__le32 *d = (__le32 *)dst;
|
| 429 |
|
|
u32 r0, r1, r2, r3, r4;
|
| 430 |
|
|
|
| 431 |
|
|
r0 = le32_to_cpu(s[0]);
|
| 432 |
|
|
r1 = le32_to_cpu(s[1]);
|
| 433 |
|
|
r2 = le32_to_cpu(s[2]);
|
| 434 |
|
|
r3 = le32_to_cpu(s[3]);
|
| 435 |
|
|
|
| 436 |
|
|
K(r0,r1,r2,r3,32);
|
| 437 |
|
|
SI7(r0,r1,r2,r3,r4); KL(r1,r3,r0,r4,r2,31);
|
| 438 |
|
|
SI6(r1,r3,r0,r4,r2); KL(r0,r2,r4,r1,r3,30);
|
| 439 |
|
|
SI5(r0,r2,r4,r1,r3); KL(r2,r3,r0,r4,r1,29);
|
| 440 |
|
|
SI4(r2,r3,r0,r4,r1); KL(r2,r0,r1,r4,r3,28);
|
| 441 |
|
|
SI3(r2,r0,r1,r4,r3); KL(r1,r2,r3,r4,r0,27);
|
| 442 |
|
|
SI2(r1,r2,r3,r4,r0); KL(r2,r0,r4,r3,r1,26);
|
| 443 |
|
|
SI1(r2,r0,r4,r3,r1); KL(r1,r0,r4,r3,r2,25);
|
| 444 |
|
|
SI0(r1,r0,r4,r3,r2); KL(r4,r2,r0,r1,r3,24);
|
| 445 |
|
|
SI7(r4,r2,r0,r1,r3); KL(r2,r1,r4,r3,r0,23);
|
| 446 |
|
|
SI6(r2,r1,r4,r3,r0); KL(r4,r0,r3,r2,r1,22);
|
| 447 |
|
|
SI5(r4,r0,r3,r2,r1); KL(r0,r1,r4,r3,r2,21);
|
| 448 |
|
|
SI4(r0,r1,r4,r3,r2); KL(r0,r4,r2,r3,r1,20);
|
| 449 |
|
|
SI3(r0,r4,r2,r3,r1); KL(r2,r0,r1,r3,r4,19);
|
| 450 |
|
|
SI2(r2,r0,r1,r3,r4); KL(r0,r4,r3,r1,r2,18);
|
| 451 |
|
|
SI1(r0,r4,r3,r1,r2); KL(r2,r4,r3,r1,r0,17);
|
| 452 |
|
|
SI0(r2,r4,r3,r1,r0); KL(r3,r0,r4,r2,r1,16);
|
| 453 |
|
|
SI7(r3,r0,r4,r2,r1); KL(r0,r2,r3,r1,r4,15);
|
| 454 |
|
|
SI6(r0,r2,r3,r1,r4); KL(r3,r4,r1,r0,r2,14);
|
| 455 |
|
|
SI5(r3,r4,r1,r0,r2); KL(r4,r2,r3,r1,r0,13);
|
| 456 |
|
|
SI4(r4,r2,r3,r1,r0); KL(r4,r3,r0,r1,r2,12);
|
| 457 |
|
|
SI3(r4,r3,r0,r1,r2); KL(r0,r4,r2,r1,r3,11);
|
| 458 |
|
|
SI2(r0,r4,r2,r1,r3); KL(r4,r3,r1,r2,r0,10);
|
| 459 |
|
|
SI1(r4,r3,r1,r2,r0); KL(r0,r3,r1,r2,r4,9);
|
| 460 |
|
|
SI0(r0,r3,r1,r2,r4); KL(r1,r4,r3,r0,r2,8);
|
| 461 |
|
|
SI7(r1,r4,r3,r0,r2); KL(r4,r0,r1,r2,r3,7);
|
| 462 |
|
|
SI6(r4,r0,r1,r2,r3); KL(r1,r3,r2,r4,r0,6);
|
| 463 |
|
|
SI5(r1,r3,r2,r4,r0); KL(r3,r0,r1,r2,r4,5);
|
| 464 |
|
|
SI4(r3,r0,r1,r2,r4); KL(r3,r1,r4,r2,r0,4);
|
| 465 |
|
|
SI3(r3,r1,r4,r2,r0); KL(r4,r3,r0,r2,r1,3);
|
| 466 |
|
|
SI2(r4,r3,r0,r2,r1); KL(r3,r1,r2,r0,r4,2);
|
| 467 |
|
|
SI1(r3,r1,r2,r0,r4); KL(r4,r1,r2,r0,r3,1);
|
| 468 |
|
|
SI0(r4,r1,r2,r0,r3); K(r2,r3,r1,r4,0);
|
| 469 |
|
|
|
| 470 |
|
|
d[0] = cpu_to_le32(r2);
|
| 471 |
|
|
d[1] = cpu_to_le32(r3);
|
| 472 |
|
|
d[2] = cpu_to_le32(r1);
|
| 473 |
|
|
d[3] = cpu_to_le32(r4);
|
| 474 |
|
|
}
|
| 475 |
|
|
|
| 476 |
|
|
static struct crypto_alg serpent_alg = {
|
| 477 |
|
|
.cra_name = "serpent",
|
| 478 |
|
|
.cra_flags = CRYPTO_ALG_TYPE_CIPHER,
|
| 479 |
|
|
.cra_blocksize = SERPENT_BLOCK_SIZE,
|
| 480 |
|
|
.cra_ctxsize = sizeof(struct serpent_ctx),
|
| 481 |
|
|
.cra_alignmask = 3,
|
| 482 |
|
|
.cra_module = THIS_MODULE,
|
| 483 |
|
|
.cra_list = LIST_HEAD_INIT(serpent_alg.cra_list),
|
| 484 |
|
|
.cra_u = { .cipher = {
|
| 485 |
|
|
.cia_min_keysize = SERPENT_MIN_KEY_SIZE,
|
| 486 |
|
|
.cia_max_keysize = SERPENT_MAX_KEY_SIZE,
|
| 487 |
|
|
.cia_setkey = serpent_setkey,
|
| 488 |
|
|
.cia_encrypt = serpent_encrypt,
|
| 489 |
|
|
.cia_decrypt = serpent_decrypt } }
|
| 490 |
|
|
};
|
| 491 |
|
|
|
| 492 |
|
|
static int tnepres_setkey(struct crypto_tfm *tfm, const u8 *key,
|
| 493 |
|
|
unsigned int keylen)
|
| 494 |
|
|
{
|
| 495 |
|
|
u8 rev_key[SERPENT_MAX_KEY_SIZE];
|
| 496 |
|
|
int i;
|
| 497 |
|
|
|
| 498 |
|
|
for (i = 0; i < keylen; ++i)
|
| 499 |
|
|
rev_key[keylen - i - 1] = key[i];
|
| 500 |
|
|
|
| 501 |
|
|
return serpent_setkey(tfm, rev_key, keylen);
|
| 502 |
|
|
}
|
| 503 |
|
|
|
| 504 |
|
|
static void tnepres_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
|
| 505 |
|
|
{
|
| 506 |
|
|
const u32 * const s = (const u32 * const)src;
|
| 507 |
|
|
u32 * const d = (u32 * const)dst;
|
| 508 |
|
|
|
| 509 |
|
|
u32 rs[4], rd[4];
|
| 510 |
|
|
|
| 511 |
|
|
rs[0] = swab32(s[3]);
|
| 512 |
|
|
rs[1] = swab32(s[2]);
|
| 513 |
|
|
rs[2] = swab32(s[1]);
|
| 514 |
|
|
rs[3] = swab32(s[0]);
|
| 515 |
|
|
|
| 516 |
|
|
serpent_encrypt(tfm, (u8 *)rd, (u8 *)rs);
|
| 517 |
|
|
|
| 518 |
|
|
d[0] = swab32(rd[3]);
|
| 519 |
|
|
d[1] = swab32(rd[2]);
|
| 520 |
|
|
d[2] = swab32(rd[1]);
|
| 521 |
|
|
d[3] = swab32(rd[0]);
|
| 522 |
|
|
}
|
| 523 |
|
|
|
| 524 |
|
|
static void tnepres_decrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
|
| 525 |
|
|
{
|
| 526 |
|
|
const u32 * const s = (const u32 * const)src;
|
| 527 |
|
|
u32 * const d = (u32 * const)dst;
|
| 528 |
|
|
|
| 529 |
|
|
u32 rs[4], rd[4];
|
| 530 |
|
|
|
| 531 |
|
|
rs[0] = swab32(s[3]);
|
| 532 |
|
|
rs[1] = swab32(s[2]);
|
| 533 |
|
|
rs[2] = swab32(s[1]);
|
| 534 |
|
|
rs[3] = swab32(s[0]);
|
| 535 |
|
|
|
| 536 |
|
|
serpent_decrypt(tfm, (u8 *)rd, (u8 *)rs);
|
| 537 |
|
|
|
| 538 |
|
|
d[0] = swab32(rd[3]);
|
| 539 |
|
|
d[1] = swab32(rd[2]);
|
| 540 |
|
|
d[2] = swab32(rd[1]);
|
| 541 |
|
|
d[3] = swab32(rd[0]);
|
| 542 |
|
|
}
|
| 543 |
|
|
|
| 544 |
|
|
static struct crypto_alg tnepres_alg = {
|
| 545 |
|
|
.cra_name = "tnepres",
|
| 546 |
|
|
.cra_flags = CRYPTO_ALG_TYPE_CIPHER,
|
| 547 |
|
|
.cra_blocksize = SERPENT_BLOCK_SIZE,
|
| 548 |
|
|
.cra_ctxsize = sizeof(struct serpent_ctx),
|
| 549 |
|
|
.cra_alignmask = 3,
|
| 550 |
|
|
.cra_module = THIS_MODULE,
|
| 551 |
|
|
.cra_list = LIST_HEAD_INIT(serpent_alg.cra_list),
|
| 552 |
|
|
.cra_u = { .cipher = {
|
| 553 |
|
|
.cia_min_keysize = SERPENT_MIN_KEY_SIZE,
|
| 554 |
|
|
.cia_max_keysize = SERPENT_MAX_KEY_SIZE,
|
| 555 |
|
|
.cia_setkey = tnepres_setkey,
|
| 556 |
|
|
.cia_encrypt = tnepres_encrypt,
|
| 557 |
|
|
.cia_decrypt = tnepres_decrypt } }
|
| 558 |
|
|
};
|
| 559 |
|
|
|
| 560 |
|
|
static int __init init(void)
|
| 561 |
|
|
{
|
| 562 |
|
|
int ret = crypto_register_alg(&serpent_alg);
|
| 563 |
|
|
|
| 564 |
|
|
if (ret)
|
| 565 |
|
|
return ret;
|
| 566 |
|
|
|
| 567 |
|
|
ret = crypto_register_alg(&tnepres_alg);
|
| 568 |
|
|
|
| 569 |
|
|
if (ret)
|
| 570 |
|
|
crypto_unregister_alg(&serpent_alg);
|
| 571 |
|
|
|
| 572 |
|
|
return ret;
|
| 573 |
|
|
}
|
| 574 |
|
|
|
| 575 |
|
|
static void __exit fini(void)
|
| 576 |
|
|
{
|
| 577 |
|
|
crypto_unregister_alg(&tnepres_alg);
|
| 578 |
|
|
crypto_unregister_alg(&serpent_alg);
|
| 579 |
|
|
}
|
| 580 |
|
|
|
| 581 |
|
|
module_init(init);
|
| 582 |
|
|
module_exit(fini);
|
| 583 |
|
|
|
| 584 |
|
|
MODULE_LICENSE("GPL");
|
| 585 |
|
|
MODULE_DESCRIPTION("Serpent and tnepres (kerneli compatible serpent reversed) Cipher Algorithm");
|
| 586 |
|
|
MODULE_AUTHOR("Dag Arne Osvik <osvik@ii.uib.no>");
|
| 587 |
|
|
MODULE_ALIAS("tnepres");
|
