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40
41 /*
42 //
43 // Purpose:
44 // Cryptography Primitive.
45 // Internal Safe Rijndael Encrypt, Decrypt
46 //
47 //
48 */
49
50 #if !defined(_PCP_RIJ_SAFE2_H)
51 #define _PCP_RIJ_SAFE2_H
52
53 // transpose 4x4 Ipp8u matrix
54 #define TRANSPOSE(out, inp) \
55 (out)[ 0] = (inp)[ 0]; \
56 (out)[ 4] = (inp)[ 1]; \
57 (out)[ 8] = (inp)[ 2]; \
58 (out)[12] = (inp)[ 3]; \
59 \
60 (out)[ 1] = (inp)[ 4]; \
61 (out)[ 5] = (inp)[ 5]; \
62 (out)[ 9] = (inp)[ 6]; \
63 (out)[13] = (inp)[ 7]; \
64 \
65 (out)[ 2] = (inp)[ 8]; \
66 (out)[ 6] = (inp)[ 9]; \
67 (out)[10] = (inp)[10]; \
68 (out)[14] = (inp)[11]; \
69 \
70 (out)[ 3] = (inp)[12]; \
71 (out)[ 7] = (inp)[13]; \
72 (out)[11] = (inp)[14]; \
73 (out)[15] = (inp)[15]
74
XorRoundKey(Ipp32u * state,const Ipp32u * RoundKey)75 __INLINE void XorRoundKey(Ipp32u* state, const Ipp32u* RoundKey)
76 {
77 state[0] ^= RoundKey[0];
78 state[1] ^= RoundKey[1];
79 state[2] ^= RoundKey[2];
80 state[3] ^= RoundKey[3];
81 }
82
83 // xtime is a macro that finds the product of {02} and the argument to xtime modulo {1b}
mask4(Ipp32u x)84 __INLINE Ipp32u mask4(Ipp32u x)
85 {
86 x &= 0x80808080;
87 return (Ipp32u)((x<<1) - (x>>7));
88 }
89
xtime4(Ipp32u x)90 __INLINE Ipp32u xtime4(Ipp32u x)
91 {
92 Ipp32u t = (x+x) &0xFEFEFEFE;
93 t ^= mask4(x) & 0x1B1B1B1B;
94 return t;
95 }
96
97 #endif /* _PCP_RIJ_SAFE2_H */
98