?? aes.cpp
字號:
Te2[(s3 >> 8) & 0xff] ^ Te3[(s0 ) & 0xff] ^ rk[5]; t2 = Te0[(s2 >> 24) ] ^ Te1[(s3 >> 16) & 0xff] ^ Te2[(s0 >> 8) & 0xff] ^ Te3[(s1 ) & 0xff] ^ rk[6]; t3 = Te0[(s3 >> 24) ] ^ Te1[(s0 >> 16) & 0xff] ^ Te2[(s1 >> 8) & 0xff] ^ Te3[(s2 ) & 0xff] ^ rk[7]; rk += 8; if (--r == 0) { break; } s0 = Te0[(t0 >> 24) ] ^ Te1[(t1 >> 16) & 0xff] ^ Te2[(t2 >> 8) & 0xff] ^ Te3[(t3 ) & 0xff] ^ rk[0]; s1 = Te0[(t1 >> 24) ] ^ Te1[(t2 >> 16) & 0xff] ^ Te2[(t3 >> 8) & 0xff] ^ Te3[(t0 ) & 0xff] ^ rk[1]; s2 = Te0[(t2 >> 24) ] ^ Te1[(t3 >> 16) & 0xff] ^ Te2[(t0 >> 8) & 0xff] ^ Te3[(t1 ) & 0xff] ^ rk[2]; s3 = Te0[(t3 >> 24) ] ^ Te1[(t0 >> 16) & 0xff] ^ Te2[(t1 >> 8) & 0xff] ^ Te3[(t2 ) & 0xff] ^ rk[3]; }#endif /* ?FULL_UNROLL */ /* * apply last round and * map cipher state to byte array block: */ s0 = (Te4[(t0 >> 24) ] & 0xff000000) ^ (Te4[(t1 >> 16) & 0xff] & 0x00ff0000) ^ (Te4[(t2 >> 8) & 0xff] & 0x0000ff00) ^ (Te4[(t3 ) & 0xff] & 0x000000ff) ^ rk[0]; PUTU32(out , s0); s1 = (Te4[(t1 >> 24) ] & 0xff000000) ^ (Te4[(t2 >> 16) & 0xff] & 0x00ff0000) ^ (Te4[(t3 >> 8) & 0xff] & 0x0000ff00) ^ (Te4[(t0 ) & 0xff] & 0x000000ff) ^ rk[1]; PUTU32(out + 4, s1); s2 = (Te4[(t2 >> 24) ] & 0xff000000) ^ (Te4[(t3 >> 16) & 0xff] & 0x00ff0000) ^ (Te4[(t0 >> 8) & 0xff] & 0x0000ff00) ^ (Te4[(t1 ) & 0xff] & 0x000000ff) ^ rk[2]; PUTU32(out + 8, s2); s3 = (Te4[(t3 >> 24) ] & 0xff000000) ^ (Te4[(t0 >> 16) & 0xff] & 0x00ff0000) ^ (Te4[(t1 >> 8) & 0xff] & 0x0000ff00) ^ (Te4[(t2 ) & 0xff] & 0x000000ff) ^ rk[3]; PUTU32(out + 12, s3);}void AES_decrypt(const unsigned char *in, unsigned char *out, const AES_KEY *key) { const u32 *rk; u32 s0, s1, s2, s3, t0, t1, t2, t3;#ifndef FULL_UNROLL int r;#endif /* ?FULL_UNROLL */ assert(in && out && key); rk = key->rd_key; /* * map byte array block to cipher state * and add initial round key: */ s0 = GETU32(in ) ^ rk[0]; s1 = GETU32(in + 4) ^ rk[1]; s2 = GETU32(in + 8) ^ rk[2]; s3 = GETU32(in + 12) ^ rk[3];#ifdef FULL_UNROLL /* round 1: */ t0 = Td0[s0 >> 24] ^ Td1[(s3 >> 16) & 0xff] ^ Td2[(s2 >> 8) & 0xff] ^ Td3[s1 & 0xff] ^ rk[ 4]; t1 = Td0[s1 >> 24] ^ Td1[(s0 >> 16) & 0xff] ^ Td2[(s3 >> 8) & 0xff] ^ Td3[s2 & 0xff] ^ rk[ 5]; t2 = Td0[s2 >> 24] ^ Td1[(s1 >> 16) & 0xff] ^ Td2[(s0 >> 8) & 0xff] ^ Td3[s3 & 0xff] ^ rk[ 6]; t3 = Td0[s3 >> 24] ^ Td1[(s2 >> 16) & 0xff] ^ Td2[(s1 >> 8) & 0xff] ^ Td3[s0 & 0xff] ^ rk[ 7]; /* round 2: */ s0 = Td0[t0 >> 24] ^ Td1[(t3 >> 16) & 0xff] ^ Td2[(t2 >> 8) & 0xff] ^ Td3[t1 & 0xff] ^ rk[ 8]; s1 = Td0[t1 >> 24] ^ Td1[(t0 >> 16) & 0xff] ^ Td2[(t3 >> 8) & 0xff] ^ Td3[t2 & 0xff] ^ rk[ 9]; s2 = Td0[t2 >> 24] ^ Td1[(t1 >> 16) & 0xff] ^ Td2[(t0 >> 8) & 0xff] ^ Td3[t3 & 0xff] ^ rk[10]; s3 = Td0[t3 >> 24] ^ Td1[(t2 >> 16) & 0xff] ^ Td2[(t1 >> 8) & 0xff] ^ Td3[t0 & 0xff] ^ rk[11]; /* round 3: */ t0 = Td0[s0 >> 24] ^ Td1[(s3 >> 16) & 0xff] ^ Td2[(s2 >> 8) & 0xff] ^ Td3[s1 & 0xff] ^ rk[12]; t1 = Td0[s1 >> 24] ^ Td1[(s0 >> 16) & 0xff] ^ Td2[(s3 >> 8) & 0xff] ^ Td3[s2 & 0xff] ^ rk[13]; t2 = Td0[s2 >> 24] ^ Td1[(s1 >> 16) & 0xff] ^ Td2[(s0 >> 8) & 0xff] ^ Td3[s3 & 0xff] ^ rk[14]; t3 = Td0[s3 >> 24] ^ Td1[(s2 >> 16) & 0xff] ^ Td2[(s1 >> 8) & 0xff] ^ Td3[s0 & 0xff] ^ rk[15]; /* round 4: */ s0 = Td0[t0 >> 24] ^ Td1[(t3 >> 16) & 0xff] ^ Td2[(t2 >> 8) & 0xff] ^ Td3[t1 & 0xff] ^ rk[16]; s1 = Td0[t1 >> 24] ^ Td1[(t0 >> 16) & 0xff] ^ Td2[(t3 >> 8) & 0xff] ^ Td3[t2 & 0xff] ^ rk[17]; s2 = Td0[t2 >> 24] ^ Td1[(t1 >> 16) & 0xff] ^ Td2[(t0 >> 8) & 0xff] ^ Td3[t3 & 0xff] ^ rk[18]; s3 = Td0[t3 >> 24] ^ Td1[(t2 >> 16) & 0xff] ^ Td2[(t1 >> 8) & 0xff] ^ Td3[t0 & 0xff] ^ rk[19]; /* round 5: */ t0 = Td0[s0 >> 24] ^ Td1[(s3 >> 16) & 0xff] ^ Td2[(s2 >> 8) & 0xff] ^ Td3[s1 & 0xff] ^ rk[20]; t1 = Td0[s1 >> 24] ^ Td1[(s0 >> 16) & 0xff] ^ Td2[(s3 >> 8) & 0xff] ^ Td3[s2 & 0xff] ^ rk[21]; t2 = Td0[s2 >> 24] ^ Td1[(s1 >> 16) & 0xff] ^ Td2[(s0 >> 8) & 0xff] ^ Td3[s3 & 0xff] ^ rk[22]; t3 = Td0[s3 >> 24] ^ Td1[(s2 >> 16) & 0xff] ^ Td2[(s1 >> 8) & 0xff] ^ Td3[s0 & 0xff] ^ rk[23]; /* round 6: */ s0 = Td0[t0 >> 24] ^ Td1[(t3 >> 16) & 0xff] ^ Td2[(t2 >> 8) & 0xff] ^ Td3[t1 & 0xff] ^ rk[24]; s1 = Td0[t1 >> 24] ^ Td1[(t0 >> 16) & 0xff] ^ Td2[(t3 >> 8) & 0xff] ^ Td3[t2 & 0xff] ^ rk[25]; s2 = Td0[t2 >> 24] ^ Td1[(t1 >> 16) & 0xff] ^ Td2[(t0 >> 8) & 0xff] ^ Td3[t3 & 0xff] ^ rk[26]; s3 = Td0[t3 >> 24] ^ Td1[(t2 >> 16) & 0xff] ^ Td2[(t1 >> 8) & 0xff] ^ Td3[t0 & 0xff] ^ rk[27]; /* round 7: */ t0 = Td0[s0 >> 24] ^ Td1[(s3 >> 16) & 0xff] ^ Td2[(s2 >> 8) & 0xff] ^ Td3[s1 & 0xff] ^ rk[28]; t1 = Td0[s1 >> 24] ^ Td1[(s0 >> 16) & 0xff] ^ Td2[(s3 >> 8) & 0xff] ^ Td3[s2 & 0xff] ^ rk[29]; t2 = Td0[s2 >> 24] ^ Td1[(s1 >> 16) & 0xff] ^ Td2[(s0 >> 8) & 0xff] ^ Td3[s3 & 0xff] ^ rk[30]; t3 = Td0[s3 >> 24] ^ Td1[(s2 >> 16) & 0xff] ^ Td2[(s1 >> 8) & 0xff] ^ Td3[s0 & 0xff] ^ rk[31]; /* round 8: */ s0 = Td0[t0 >> 24] ^ Td1[(t3 >> 16) & 0xff] ^ Td2[(t2 >> 8) & 0xff] ^ Td3[t1 & 0xff] ^ rk[32]; s1 = Td0[t1 >> 24] ^ Td1[(t0 >> 16) & 0xff] ^ Td2[(t3 >> 8) & 0xff] ^ Td3[t2 & 0xff] ^ rk[33]; s2 = Td0[t2 >> 24] ^ Td1[(t1 >> 16) & 0xff] ^ Td2[(t0 >> 8) & 0xff] ^ Td3[t3 & 0xff] ^ rk[34]; s3 = Td0[t3 >> 24] ^ Td1[(t2 >> 16) & 0xff] ^ Td2[(t1 >> 8) & 0xff] ^ Td3[t0 & 0xff] ^ rk[35]; /* round 9: */ t0 = Td0[s0 >> 24] ^ Td1[(s3 >> 16) & 0xff] ^ Td2[(s2 >> 8) & 0xff] ^ Td3[s1 & 0xff] ^ rk[36]; t1 = Td0[s1 >> 24] ^ Td1[(s0 >> 16) & 0xff] ^ Td2[(s3 >> 8) & 0xff] ^ Td3[s2 & 0xff] ^ rk[37]; t2 = Td0[s2 >> 24] ^ Td1[(s1 >> 16) & 0xff] ^ Td2[(s0 >> 8) & 0xff] ^ Td3[s3 & 0xff] ^ rk[38]; t3 = Td0[s3 >> 24] ^ Td1[(s2 >> 16) & 0xff] ^ Td2[(s1 >> 8) & 0xff] ^ Td3[s0 & 0xff] ^ rk[39]; if (key->rounds > 10) { /* round 10: */ s0 = Td0[t0 >> 24] ^ Td1[(t3 >> 16) & 0xff] ^ Td2[(t2 >> 8) & 0xff] ^ Td3[t1 & 0xff] ^ rk[40]; s1 = Td0[t1 >> 24] ^ Td1[(t0 >> 16) & 0xff] ^ Td2[(t3 >> 8) & 0xff] ^ Td3[t2 & 0xff] ^ rk[41]; s2 = Td0[t2 >> 24] ^ Td1[(t1 >> 16) & 0xff] ^ Td2[(t0 >> 8) & 0xff] ^ Td3[t3 & 0xff] ^ rk[42]; s3 = Td0[t3 >> 24] ^ Td1[(t2 >> 16) & 0xff] ^ Td2[(t1 >> 8) & 0xff] ^ Td3[t0 & 0xff] ^ rk[43]; /* round 11: */ t0 = Td0[s0 >> 24] ^ Td1[(s3 >> 16) & 0xff] ^ Td2[(s2 >> 8) & 0xff] ^ Td3[s1 & 0xff] ^ rk[44]; t1 = Td0[s1 >> 24] ^ Td1[(s0 >> 16) & 0xff] ^ Td2[(s3 >> 8) & 0xff] ^ Td3[s2 & 0xff] ^ rk[45]; t2 = Td0[s2 >> 24] ^ Td1[(s1 >> 16) & 0xff] ^ Td2[(s0 >> 8) & 0xff] ^ Td3[s3 & 0xff] ^ rk[46]; t3 = Td0[s3 >> 24] ^ Td1[(s2 >> 16) & 0xff] ^ Td2[(s1 >> 8) & 0xff] ^ Td3[s0 & 0xff] ^ rk[47]; if (key->rounds > 12) { /* round 12: */ s0 = Td0[t0 >> 24] ^ Td1[(t3 >> 16) & 0xff] ^ Td2[(t2 >> 8) & 0xff] ^ Td3[t1 & 0xff] ^ rk[48]; s1 = Td0[t1 >> 24] ^ Td1[(t0 >> 16) & 0xff] ^ Td2[(t3 >> 8) & 0xff] ^ Td3[t2 & 0xff] ^ rk[49]; s2 = Td0[t2 >> 24] ^ Td1[(t1 >> 16) & 0xff] ^ Td2[(t0 >> 8) & 0xff] ^ Td3[t3 & 0xff] ^ rk[50]; s3 = Td0[t3 >> 24] ^ Td1[(t2 >> 16) & 0xff] ^ Td2[(t1 >> 8) & 0xff] ^ Td3[t0 & 0xff] ^ rk[51]; /* round 13: */ t0 = Td0[s0 >> 24] ^ Td1[(s3 >> 16) & 0xff] ^ Td2[(s2 >> 8) & 0xff] ^ Td3[s1 & 0xff] ^ rk[52]; t1 = Td0[s1 >> 24] ^ Td1[(s0 >> 16) & 0xff] ^ Td2[(s3 >> 8) & 0xff] ^ Td3[s2 & 0xff] ^ rk[53]; t2 = Td0[s2 >> 24] ^ Td1[(s1 >> 16) & 0xff] ^ Td2[(s0 >> 8) & 0xff] ^ Td3[s3 & 0xff] ^ rk[54]; t3 = Td0[s3 >> 24] ^ Td1[(s2 >> 16) & 0xff] ^ Td2[(s1 >> 8) & 0xff] ^ Td3[s0 & 0xff] ^ rk[55]; } } rk += key->rounds << 2;#else /* !FULL_UNROLL */ /* * Nr - 1 full rounds: */ r = key->rounds >> 1; for (;;) { t0 = Td0[(s0 >> 24) ] ^ Td1[(s3 >> 16) & 0xff] ^ Td2[(s2 >> 8) & 0xff] ^ Td3[(s1 ) & 0xff] ^ rk[4]; t1 = Td0[(s1 >> 24) ] ^ Td1[(s0 >> 16) & 0xff] ^ Td2[(s3 >> 8) & 0xff] ^ Td3[(s2 ) & 0xff] ^ rk[5]; t2 = Td0[(s2 >> 24) ] ^ Td1[(s1 >> 16) & 0xff] ^ Td2[(s0 >> 8) & 0xff] ^ Td3[(s3 ) & 0xff] ^ rk[6]; t3 = Td0[(s3 >> 24) ] ^ Td1[(s2 >> 16) & 0xff] ^ Td2[(s1 >> 8) & 0xff] ^ Td3[(s0 ) & 0xff] ^ rk[7]; rk += 8; if (--r == 0) { break; } s0 = Td0[(t0 >> 24) ] ^ Td1[(t3 >> 16) & 0xff] ^ Td2[(t2 >> 8) & 0xff] ^ Td3[(t1 ) & 0xff] ^ rk[0]; s1 = Td0[(t1 >> 24) ] ^ Td1[(t0 >> 16) & 0xff] ^ Td2[(t3 >> 8) & 0xff] ^ Td3[(t2 ) & 0xff] ^ rk[1]; s2 = Td0[(t2 >> 24) ] ^ Td1[(t1 >> 16) & 0xff] ^ Td2[(t0 >> 8) & 0xff] ^ Td3[(t3 ) & 0xff] ^ rk[2]; s3 = Td0[(t3 >> 24) ] ^ Td1[(t2 >> 16) & 0xff] ^ Td2[(t1 >> 8) & 0xff] ^ Td3[(t0 ) & 0xff] ^ rk[3]; }#endif /* ?FULL_UNROLL */ /* * apply last round and * map cipher state to byte array block: */ s0 = (Td4[(t0 >> 24) ] & 0xff000000) ^ (Td4[(t3 >> 16) & 0xff] & 0x00ff0000) ^ (Td4[(t2 >> 8) & 0xff] & 0x0000ff00) ^ (Td4[(t1 ) & 0xff] & 0x000000ff) ^ rk[0]; PUTU32(out , s0); s1 = (Td4[(t1 >> 24) ] & 0xff000000) ^ (Td4[(t0 >> 16) & 0xff] & 0x00ff0000) ^ (Td4[(t3 >> 8) & 0xff] & 0x0000ff00) ^ (Td4[(t2 ) & 0xff] & 0x000000ff) ^ rk[1]; PUTU32(out + 4, s1); s2 = (Td4[(t2 >> 24) ] & 0xff000000) ^ (Td4[(t1 >> 16) & 0xff] & 0x00ff0000) ^ (Td4[(t0 >> 8) & 0xff] & 0x0000ff00) ^ (Td4[(t3 ) & 0xff] & 0x000000ff) ^ rk[2]; PUTU32(out + 8, s2); s3 = (Td4[(t3 >> 24) ] & 0xff000000) ^ (Td4[(t2 >> 16) & 0xff] & 0x00ff0000) ^ (Td4[(t1 >> 8) & 0xff] & 0x0000ff00) ^ (Td4[(t0 ) & 0xff] & 0x000000ff) ^ rk[3]; PUTU32(out + 12, s3);}?? 快捷鍵說明
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