* Rounds used for each AES key size
*/
#define AES128_ROUNDS 10
+#define AES192_ROUNDS 12
typedef struct private_aesni_key_t private_aesni_key_t;
schedule[10] = assist128(t, _mm_aeskeygenassist_si128(t, 0x36));
}
+/**
+ * Assist in creating a 192-bit round key
+ */
+static __m128i assist192(__m128i b, __m128i c, __m128i *a)
+{
+ __m128i t;
+
+ b = _mm_shuffle_epi32(b, 0x55);
+ t = _mm_slli_si128(*a, 0x04);
+ *a = _mm_xor_si128(*a, t);
+ t = _mm_slli_si128(t, 0x04);
+ *a = _mm_xor_si128(*a, t);
+ t = _mm_slli_si128(t, 0x04);
+ *a = _mm_xor_si128(*a, t);
+ *a = _mm_xor_si128(*a, b);
+ b = _mm_shuffle_epi32(*a, 0xff);
+ t = _mm_slli_si128(c, 0x04);
+ t = _mm_xor_si128(c, t);
+ t = _mm_xor_si128(t, b);
+
+ return t;
+}
+
+/**
+ * return a[63:0] | b[63:0] << 64
+ */
+static __m128i _mm_shuffle_i00(__m128i a, __m128i b)
+{
+ return (__m128i)_mm_shuffle_pd((__m128d)a, (__m128d)b, 0);
+}
+
+/**
+ * return a[127:64] >> 64 | b[63:0] << 64
+ */
+static __m128i _mm_shuffle_i01(__m128i a, __m128i b)
+{
+ return (__m128i)_mm_shuffle_pd((__m128d)a, (__m128d)b, 1);
+}
+
+/**
+ * Expand a 192-bit encryption key to round keys
+ */
+static void expand192(__m128i *key, __m128i *schedule)
+{
+ __m128i t1, t2, t3;
+
+ schedule[0] = t1 = _mm_loadu_si128(key);
+ t2 = t3 = _mm_loadu_si128(key + 1);
+
+ t2 = assist192(_mm_aeskeygenassist_si128(t2, 0x1), t2, &t1);
+ schedule[1] = _mm_shuffle_i00(t3, t1);
+ schedule[2] = _mm_shuffle_i01(t1, t2);
+ t2 = t3 = assist192(_mm_aeskeygenassist_si128(t2, 0x2), t2, &t1);
+ schedule[3] = t1;
+
+ t2 = assist192(_mm_aeskeygenassist_si128(t2, 0x4), t2, &t1);
+ schedule[4] = _mm_shuffle_i00(t3, t1);
+ schedule[5] = _mm_shuffle_i01(t1, t2);
+ t2 = t3 = assist192(_mm_aeskeygenassist_si128(t2, 0x8), t2, &t1);
+ schedule[6] = t1;
+
+ t2 = assist192(_mm_aeskeygenassist_si128 (t2,0x10), t2, &t1);
+ schedule[7] = _mm_shuffle_i00(t3, t1);
+ schedule[8] = _mm_shuffle_i01(t1, t2);
+ t2 = t3 = assist192(_mm_aeskeygenassist_si128 (t2,0x20), t2, &t1);
+ schedule[9] = t1;
+
+ t2 = assist192(_mm_aeskeygenassist_si128(t2, 0x40), t2, &t1);
+ schedule[10] = _mm_shuffle_i00(t3, t1);
+ schedule[11] = _mm_shuffle_i01(t1, t2);
+ assist192(_mm_aeskeygenassist_si128(t2, 0x80), t2, &t1);
+ schedule[12] = t1;
+}
+
METHOD(aesni_key_t, destroy, void,
private_aesni_key_t *this)
{
case 16:
rounds = AES128_ROUNDS;
break;
+ case 24:
+ rounds = AES192_ROUNDS;
+ break;
default:
return NULL;
}
case 16:
expand128((__m128i*)key.ptr, this->public.schedule);
break;
+ case 24:
+ expand192((__m128i*)key.ptr, this->public.schedule);
+ break;
default:
break;
}