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2fb5fa4686
Reviewed-by: Paul Dale <pauli@openssl.org> Reviewed-by: Tomas Mraz <tomas@openssl.org> (Merged from https://github.com/openssl/openssl/pull/20048)
144 lines
6.0 KiB
C
144 lines
6.0 KiB
C
/*
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* Copyright 1995-2017 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the Apache License 2.0 (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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*/
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#ifdef OPENSSL_SYS_WIN32
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# include <stdlib.h>
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#endif
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/* NOTE - c is not incremented as per n2l */
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#define n2ln(c,l1,l2,n) { \
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c+=n; \
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l1=l2=0; \
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switch (n) { \
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case 8: l2 =((unsigned long)(*(--(c)))) ; \
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/* fall through */ \
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case 7: l2|=((unsigned long)(*(--(c))))<< 8; \
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/* fall through */ \
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case 6: l2|=((unsigned long)(*(--(c))))<<16; \
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/* fall through */ \
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case 5: l2|=((unsigned long)(*(--(c))))<<24; \
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/* fall through */ \
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case 4: l1 =((unsigned long)(*(--(c)))) ; \
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/* fall through */ \
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case 3: l1|=((unsigned long)(*(--(c))))<< 8; \
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/* fall through */ \
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case 2: l1|=((unsigned long)(*(--(c))))<<16; \
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/* fall through */ \
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case 1: l1|=((unsigned long)(*(--(c))))<<24; \
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} \
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}
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/* NOTE - c is not incremented as per l2n */
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#define l2nn(l1,l2,c,n) { \
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c+=n; \
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switch (n) { \
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case 8: *(--(c))=(unsigned char)(((l2) )&0xff); \
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/* fall through */ \
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case 7: *(--(c))=(unsigned char)(((l2)>> 8)&0xff); \
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/* fall through */ \
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case 6: *(--(c))=(unsigned char)(((l2)>>16)&0xff); \
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/* fall through */ \
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case 5: *(--(c))=(unsigned char)(((l2)>>24)&0xff); \
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/* fall through */ \
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case 4: *(--(c))=(unsigned char)(((l1) )&0xff); \
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/* fall through */ \
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case 3: *(--(c))=(unsigned char)(((l1)>> 8)&0xff); \
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/* fall through */ \
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case 2: *(--(c))=(unsigned char)(((l1)>>16)&0xff); \
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/* fall through */ \
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case 1: *(--(c))=(unsigned char)(((l1)>>24)&0xff); \
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} \
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}
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#undef n2l
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#define n2l(c,l) (l =((unsigned long)(*((c)++)))<<24L, \
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l|=((unsigned long)(*((c)++)))<<16L, \
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l|=((unsigned long)(*((c)++)))<< 8L, \
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l|=((unsigned long)(*((c)++))))
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#undef l2n
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#define l2n(l,c) (*((c)++)=(unsigned char)(((l)>>24L)&0xff), \
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*((c)++)=(unsigned char)(((l)>>16L)&0xff), \
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*((c)++)=(unsigned char)(((l)>> 8L)&0xff), \
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*((c)++)=(unsigned char)(((l) )&0xff))
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#if defined(OPENSSL_SYS_WIN32) && defined(_MSC_VER)
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# define ROTL(a,n) (_lrotl(a,n))
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#else
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# define ROTL(a,n) ((((a)<<(n))&0xffffffffL)|((a)>>((32-(n))&31)))
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#endif
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#define C_M 0x3fc
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#define C_0 22L
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#define C_1 14L
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#define C_2 6L
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#define C_3 2L /* left shift */
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/* The rotate has an extra 16 added to it to help the x86 asm */
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#if defined(CAST_PTR)
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# define E_CAST(n,key,L,R,OP1,OP2,OP3) \
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{ \
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int i; \
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t=(key[n*2] OP1 R)&0xffffffffL; \
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i=key[n*2+1]; \
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t=ROTL(t,i); \
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L^= (((((*(CAST_LONG *)((unsigned char *) \
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CAST_S_table0+((t>>C_2)&C_M)) OP2 \
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*(CAST_LONG *)((unsigned char *) \
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CAST_S_table1+((t<<C_3)&C_M)))&0xffffffffL) OP3 \
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*(CAST_LONG *)((unsigned char *) \
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CAST_S_table2+((t>>C_0)&C_M)))&0xffffffffL) OP1 \
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*(CAST_LONG *)((unsigned char *) \
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CAST_S_table3+((t>>C_1)&C_M)))&0xffffffffL; \
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}
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#elif defined(CAST_PTR2)
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# define E_CAST(n,key,L,R,OP1,OP2,OP3) \
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{ \
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int i; \
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CAST_LONG u,v,w; \
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w=(key[n*2] OP1 R)&0xffffffffL; \
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i=key[n*2+1]; \
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w=ROTL(w,i); \
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u=w>>C_2; \
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v=w<<C_3; \
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u&=C_M; \
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v&=C_M; \
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t= *(CAST_LONG *)((unsigned char *)CAST_S_table0+u); \
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u=w>>C_0; \
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t=(t OP2 *(CAST_LONG *)((unsigned char *)CAST_S_table1+v))&0xffffffffL;\
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v=w>>C_1; \
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u&=C_M; \
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v&=C_M; \
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t=(t OP3 *(CAST_LONG *)((unsigned char *)CAST_S_table2+u)&0xffffffffL);\
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t=(t OP1 *(CAST_LONG *)((unsigned char *)CAST_S_table3+v)&0xffffffffL);\
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L^=(t&0xffffffff); \
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}
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#else
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# define E_CAST(n,key,L,R,OP1,OP2,OP3) \
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{ \
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CAST_LONG a,b,c,d; \
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t=(key[n*2] OP1 R)&0xffffffff; \
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t=ROTL(t,(key[n*2+1])); \
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a=CAST_S_table0[(t>> 8)&0xff]; \
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b=CAST_S_table1[(t )&0xff]; \
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c=CAST_S_table2[(t>>24)&0xff]; \
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d=CAST_S_table3[(t>>16)&0xff]; \
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L^=(((((a OP2 b)&0xffffffffL) OP3 c)&0xffffffffL) OP1 d)&0xffffffffL; \
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}
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#endif
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extern const CAST_LONG CAST_S_table0[256];
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extern const CAST_LONG CAST_S_table1[256];
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extern const CAST_LONG CAST_S_table2[256];
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extern const CAST_LONG CAST_S_table3[256];
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extern const CAST_LONG CAST_S_table4[256];
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extern const CAST_LONG CAST_S_table5[256];
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extern const CAST_LONG CAST_S_table6[256];
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extern const CAST_LONG CAST_S_table7[256];
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