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51 lines
1.3 KiB
C
51 lines
1.3 KiB
C
/**
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* Author......: See docs/credits.txt
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* License.....: MIT
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*/
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#ifndef _CPU_DES_H
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#define _CPU_DES_H
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#define PERM_OP(a,b,tt,n,m) \
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{ \
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tt = a >> n; \
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tt = tt ^ b; \
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tt = tt & m; \
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b = b ^ tt; \
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tt = tt << n; \
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a = a ^ tt; \
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}
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#define HPERM_OP(a,tt,n,m) \
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{ \
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tt = a << (16 + n); \
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tt = tt ^ a; \
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tt = tt & m; \
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a = a ^ tt; \
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tt = tt >> (16 + n); \
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a = a ^ tt; \
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}
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#define IP(l,r,tt) \
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{ \
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PERM_OP (r, l, tt, 4, 0x0f0f0f0f); \
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PERM_OP (l, r, tt, 16, 0x0000ffff); \
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PERM_OP (r, l, tt, 2, 0x33333333); \
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PERM_OP (l, r, tt, 8, 0x00ff00ff); \
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PERM_OP (r, l, tt, 1, 0x55555555); \
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}
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#define FP(l,r,tt) \
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{ \
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PERM_OP (l, r, tt, 1, 0x55555555); \
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PERM_OP (r, l, tt, 8, 0x00ff00ff); \
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PERM_OP (l, r, tt, 2, 0x33333333); \
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PERM_OP (r, l, tt, 16, 0x0000ffff); \
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PERM_OP (l, r, tt, 4, 0x0f0f0f0f); \
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}
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void _des_keysetup (const u32 data[2], u32 Kc[16], u32 Kd[16]);
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void _des_encrypt (u32 data[2], const u32 Kc[16], const u32 Kd[16]);
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#endif // _CPU_DES_H
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