src/crypto/aes-internal-dec.c

28 static int rijndaelKeySetupDec(u32 rk[], const u8 cipherKey[], int keyBits)
34 	Nr = rijndaelKeySetupEnc(rk, cipherKey, keyBits);
39 		temp = rk[i    ]; rk[i    ] = rk[j    ]; rk[j    ] = temp;
40 		temp = rk[i + 1]; rk[i + 1] = rk[j + 1]; rk[j + 1] = temp;
41 		temp = rk[i + 2]; rk[i + 2] = rk[j + 2]; rk[j + 2] = temp;
42 		temp = rk[i + 3]; rk[i + 3] = rk[j + 3]; rk[j + 3] = temp;
47 		rk += 4;
49 			rk[j] = TD0_(TE4((rk[j] >> 24)       )) ^
50 				TD1_(TE4((rk[j] >> 16) & 0xff)) ^
51 				TD2_(TE4((rk[j] >>  8) & 0xff)) ^
52 				TD3_(TE4((rk[j]      ) & 0xff));
61 	u32 *rk;
63 	rk = os_malloc(AES_PRIV_SIZE);
64 	if (rk == NULL)
66 	res = rijndaelKeySetupDec(rk, key, len * 8);
68 		os_free(rk);
71 	rk[AES_PRIV_NR_POS] = res;
72 	return rk;
75 static void rijndaelDecrypt(const u32 rk[/*44*/], int Nr, const u8 ct[16],
87 	s0 = GETU32(ct     ) ^ rk[0];
88 	s1 = GETU32(ct +  4) ^ rk[1];
89 	s2 = GETU32(ct +  8) ^ rk[2];
90 	s3 = GETU32(ct + 12) ^ rk[3];
93 d##0 = TD0(s##0) ^ TD1(s##3) ^ TD2(s##2) ^ TD3(s##1) ^ rk[4 * i]; \
94 d##1 = TD0(s##1) ^ TD1(s##0) ^ TD2(s##3) ^ TD3(s##2) ^ rk[4 * i + 1]; \
95 d##2 = TD0(s##2) ^ TD1(s##1) ^ TD2(s##0) ^ TD3(s##3) ^ rk[4 * i + 2]; \
96 d##3 = TD0(s##3) ^ TD1(s##2) ^ TD2(s##1) ^ TD3(s##0) ^ rk[4 * i + 3]
118 	rk += Nr << 2;
126 		rk += 8;
140 	s0 = TD41(t0) ^ TD42(t3) ^ TD43(t2) ^ TD44(t1) ^ rk[0];
142 	s1 = TD41(t1) ^ TD42(t0) ^ TD43(t3) ^ TD44(t2) ^ rk[1];
144 	s2 = TD41(t2) ^ TD42(t1) ^ TD43(t0) ^ TD44(t3) ^ rk[2];
146 	s3 = TD41(t3) ^ TD42(t2) ^ TD43(t1) ^ TD44(t0) ^ rk[3];
152 	u32 *rk = ctx;
153 	rijndaelDecrypt(ctx, rk[AES_PRIV_NR_POS], crypt, plain);