-#define l2cn(l1,l2,c,n) { \
- c+=n; \
- switch (n) { \
- case 8: *(--(c))=(unsigned char)(((l2)>>24L)&0xff); \
- case 7: *(--(c))=(unsigned char)(((l2)>>16L)&0xff); \
- case 6: *(--(c))=(unsigned char)(((l2)>> 8L)&0xff); \
- case 5: *(--(c))=(unsigned char)(((l2) )&0xff); \
- case 4: *(--(c))=(unsigned char)(((l1)>>24L)&0xff); \
- case 3: *(--(c))=(unsigned char)(((l1)>>16L)&0xff); \
- case 2: *(--(c))=(unsigned char)(((l1)>> 8L)&0xff); \
- case 1: *(--(c))=(unsigned char)(((l1) )&0xff); \
- } \
- }
-
-#if defined(OPENSSL_SYS_WIN32) && defined(_MSC_VER)
-#define ROTATE(a,n) (_lrotr(a,n))
-#else
-#define ROTATE(a,n) (((a)>>(n))+((a)<<(32-(n))))
-#endif
-
-/* Don't worry about the LOAD_DATA() stuff, that is used by
- * fcrypt() to add it's little bit to the front */
-
-#ifdef DES_FCRYPT
-
-#define LOAD_DATA_tmp(R,S,u,t,E0,E1) \
- { DES_LONG tmp; LOAD_DATA(R,S,u,t,E0,E1,tmp); }
-
-#define LOAD_DATA(R,S,u,t,E0,E1,tmp) \
- t=R^(R>>16L); \
- u=t&E0; t&=E1; \
- tmp=(u<<16); u^=R^s[S ]; u^=tmp; \
- tmp=(t<<16); t^=R^s[S+1]; t^=tmp
-#else
-#define LOAD_DATA_tmp(a,b,c,d,e,f) LOAD_DATA(a,b,c,d,e,f,g)
-#define LOAD_DATA(R,S,u,t,E0,E1,tmp) \
- u=R^s[S ]; \
- t=R^s[S+1]
-#endif
-
-/* The changes to this macro may help or hinder, depending on the
- * compiler and the architecture. gcc2 always seems to do well :-).
- * Inspired by Dana How <how@isl.stanford.edu>
- * DO NOT use the alternative version on machines with 8 byte longs.
- * It does not seem to work on the Alpha, even when DES_LONG is 4
- * bytes, probably an issue of accessing non-word aligned objects :-( */
-#ifdef DES_PTR
-
-/* It recently occurred to me that 0^0^0^0^0^0^0 == 0, so there
- * is no reason to not xor all the sub items together. This potentially
- * saves a register since things can be xored directly into L */
-
-#if defined(DES_RISC1) || defined(DES_RISC2)
-#ifdef DES_RISC1
-#define D_ENCRYPT(LL,R,S) { \
- unsigned int u1,u2,u3; \
- LOAD_DATA(R,S,u,t,E0,E1,u1); \
- u2=(int)u>>8L; \
- u1=(int)u&0xfc; \
- u2&=0xfc; \
- t=ROTATE(t,4); \
- u>>=16L; \
- LL^= *(const DES_LONG *)(des_SP +u1); \
- LL^= *(const DES_LONG *)(des_SP+0x200+u2); \
- u3=(int)(u>>8L); \
- u1=(int)u&0xfc; \
- u3&=0xfc; \
- LL^= *(const DES_LONG *)(des_SP+0x400+u1); \
- LL^= *(const DES_LONG *)(des_SP+0x600+u3); \
- u2=(int)t>>8L; \
- u1=(int)t&0xfc; \
- u2&=0xfc; \
- t>>=16L; \
- LL^= *(const DES_LONG *)(des_SP+0x100+u1); \
- LL^= *(const DES_LONG *)(des_SP+0x300+u2); \
- u3=(int)t>>8L; \
- u1=(int)t&0xfc; \
- u3&=0xfc; \
- LL^= *(const DES_LONG *)(des_SP+0x500+u1); \
- LL^= *(const DES_LONG *)(des_SP+0x700+u3); }
-#endif
-#ifdef DES_RISC2
-#define D_ENCRYPT(LL,R,S) { \
- unsigned int u1,u2,s1,s2; \
- LOAD_DATA(R,S,u,t,E0,E1,u1); \
- u2=(int)u>>8L; \
- u1=(int)u&0xfc; \
- u2&=0xfc; \
- t=ROTATE(t,4); \
- LL^= *(const DES_LONG *)(des_SP +u1); \
- LL^= *(const DES_LONG *)(des_SP+0x200+u2); \
- s1=(int)(u>>16L); \
- s2=(int)(u>>24L); \
- s1&=0xfc; \
- s2&=0xfc; \
- LL^= *(const DES_LONG *)(des_SP+0x400+s1); \
- LL^= *(const DES_LONG *)(des_SP+0x600+s2); \
- u2=(int)t>>8L; \
- u1=(int)t&0xfc; \
- u2&=0xfc; \
- LL^= *(const DES_LONG *)(des_SP+0x100+u1); \
- LL^= *(const DES_LONG *)(des_SP+0x300+u2); \
- s1=(int)(t>>16L); \
- s2=(int)(t>>24L); \
- s1&=0xfc; \
- s2&=0xfc; \
- LL^= *(const DES_LONG *)(des_SP+0x500+s1); \
- LL^= *(const DES_LONG *)(des_SP+0x700+s2); }
-#endif
-#else
-#define D_ENCRYPT(LL,R,S) { \
- LOAD_DATA_tmp(R,S,u,t,E0,E1); \
- t=ROTATE(t,4); \
- LL^= \
- *(const DES_LONG *)(des_SP +((u )&0xfc))^ \
- *(const DES_LONG *)(des_SP+0x200+((u>> 8L)&0xfc))^ \
- *(const DES_LONG *)(des_SP+0x400+((u>>16L)&0xfc))^ \
- *(const DES_LONG *)(des_SP+0x600+((u>>24L)&0xfc))^ \
- *(const DES_LONG *)(des_SP+0x100+((t )&0xfc))^ \
- *(const DES_LONG *)(des_SP+0x300+((t>> 8L)&0xfc))^ \
- *(const DES_LONG *)(des_SP+0x500+((t>>16L)&0xfc))^ \
- *(const DES_LONG *)(des_SP+0x700+((t>>24L)&0xfc)); }
-#endif
-
-#else /* original version */
-
-#if defined(DES_RISC1) || defined(DES_RISC2)
-#ifdef DES_RISC1
-#define D_ENCRYPT(LL,R,S) {\
- unsigned int u1,u2,u3; \
- LOAD_DATA(R,S,u,t,E0,E1,u1); \
- u>>=2L; \
- t=ROTATE(t,6); \
- u2=(int)u>>8L; \
- u1=(int)u&0x3f; \
- u2&=0x3f; \
- u>>=16L; \
- LL^=DES_SPtrans[0][u1]; \
- LL^=DES_SPtrans[2][u2]; \
- u3=(int)u>>8L; \
- u1=(int)u&0x3f; \
- u3&=0x3f; \
- LL^=DES_SPtrans[4][u1]; \
- LL^=DES_SPtrans[6][u3]; \
- u2=(int)t>>8L; \
- u1=(int)t&0x3f; \
- u2&=0x3f; \
- t>>=16L; \
- LL^=DES_SPtrans[1][u1]; \
- LL^=DES_SPtrans[3][u2]; \
- u3=(int)t>>8L; \
- u1=(int)t&0x3f; \
- u3&=0x3f; \
- LL^=DES_SPtrans[5][u1]; \
- LL^=DES_SPtrans[7][u3]; }
-#endif
-#ifdef DES_RISC2
-#define D_ENCRYPT(LL,R,S) {\
- unsigned int u1,u2,s1,s2; \
- LOAD_DATA(R,S,u,t,E0,E1,u1); \
- u>>=2L; \
- t=ROTATE(t,6); \
- u2=(int)u>>8L; \
- u1=(int)u&0x3f; \
- u2&=0x3f; \
- LL^=DES_SPtrans[0][u1]; \
- LL^=DES_SPtrans[2][u2]; \
- s1=(int)u>>16L; \
- s2=(int)u>>24L; \
- s1&=0x3f; \
- s2&=0x3f; \
- LL^=DES_SPtrans[4][s1]; \
- LL^=DES_SPtrans[6][s2]; \
- u2=(int)t>>8L; \
- u1=(int)t&0x3f; \
- u2&=0x3f; \
- LL^=DES_SPtrans[1][u1]; \
- LL^=DES_SPtrans[3][u2]; \
- s1=(int)t>>16; \
- s2=(int)t>>24L; \
- s1&=0x3f; \
- s2&=0x3f; \
- LL^=DES_SPtrans[5][s1]; \
- LL^=DES_SPtrans[7][s2]; }
-#endif
-
-#else
-
-#define D_ENCRYPT(LL,R,S) {\
- LOAD_DATA_tmp(R,S,u,t,E0,E1); \
- t=ROTATE(t,4); \
- LL^=\
- DES_SPtrans[0][(u>> 2L)&0x3f]^ \
- DES_SPtrans[2][(u>>10L)&0x3f]^ \
- DES_SPtrans[4][(u>>18L)&0x3f]^ \
- DES_SPtrans[6][(u>>26L)&0x3f]^ \
- DES_SPtrans[1][(t>> 2L)&0x3f]^ \
- DES_SPtrans[3][(t>>10L)&0x3f]^ \
- DES_SPtrans[5][(t>>18L)&0x3f]^ \
- DES_SPtrans[7][(t>>26L)&0x3f]; }
-#endif
-#endif
-
- /* IP and FP
- * The problem is more of a geometric problem that random bit fiddling.
- 0 1 2 3 4 5 6 7 62 54 46 38 30 22 14 6
- 8 9 10 11 12 13 14 15 60 52 44 36 28 20 12 4
- 16 17 18 19 20 21 22 23 58 50 42 34 26 18 10 2
- 24 25 26 27 28 29 30 31 to 56 48 40 32 24 16 8 0
-
- 32 33 34 35 36 37 38 39 63 55 47 39 31 23 15 7
- 40 41 42 43 44 45 46 47 61 53 45 37 29 21 13 5
- 48 49 50 51 52 53 54 55 59 51 43 35 27 19 11 3
- 56 57 58 59 60 61 62 63 57 49 41 33 25 17 9 1
-
- The output has been subject to swaps of the form
- 0 1 -> 3 1 but the odd and even bits have been put into
- 2 3 2 0
- different words. The main trick is to remember that
- t=((l>>size)^r)&(mask);
- r^=t;
- l^=(t<<size);
- can be used to swap and move bits between words.
-
- So l = 0 1 2 3 r = 16 17 18 19
- 4 5 6 7 20 21 22 23
- 8 9 10 11 24 25 26 27
- 12 13 14 15 28 29 30 31
- becomes (for size == 2 and mask == 0x3333)
- t = 2^16 3^17 -- -- l = 0 1 16 17 r = 2 3 18 19
- 6^20 7^21 -- -- 4 5 20 21 6 7 22 23
- 10^24 11^25 -- -- 8 9 24 25 10 11 24 25
- 14^28 15^29 -- -- 12 13 28 29 14 15 28 29
-
- Thanks for hints from Richard Outerbridge - he told me IP&FP
- could be done in 15 xor, 10 shifts and 5 ands.
- When I finally started to think of the problem in 2D
- I first got ~42 operations without xors. When I remembered
- how to use xors :-) I got it to its final state.
- */
-#define PERM_OP(a,b,t,n,m) ((t)=((((a)>>(n))^(b))&(m)),\
- (b)^=(t),\
- (a)^=((t)<<(n)))
-
-#define IP(l,r) \
- { \
- register DES_LONG tt; \
- PERM_OP(r,l,tt, 4,0x0f0f0f0fL); \
- PERM_OP(l,r,tt,16,0x0000ffffL); \
- PERM_OP(r,l,tt, 2,0x33333333L); \
- PERM_OP(l,r,tt, 8,0x00ff00ffL); \
- PERM_OP(r,l,tt, 1,0x55555555L); \
- }