_mm_aesenclast_si128
Microsoft Specific
Emits the Advanced Encryption Standard (AES) instruction aesenclast. This instruction performs the final round of AES encryption.
__m128i _mm_aesenclast_si128 (
__m128i v,
__m128i rkey
);
Parameters
Parameter |
Description |
[in] v |
The data that this instruction encrypts. |
[in] rkey |
The round key that this instruction uses to encrypt the data in v. |
Return value
The encrypted form of the data in v.
Requirements
Intrinsic |
Architecture |
_mm_aesenclast_si128 |
x86, x64 |
Header file <wmmintrin.h>
Remarks
This instruction encrypts data by using an Equivalent Inverse Cipher with a 128 bit key. AES encryption requires 10 iterations of encryption by using a cipher key that is 128 bits. You must perform the final iteration with this instruction. The previous nine iterations use _mm_aesenc_si128.
To decrypt the encoded data, use _mm_aesdeclast_si128.
Example
#include <wmmintrin.h>
#include <stdio.h>
int main()
{
__m128i a;
__m128i res;
__m128i key;
a.m128i_u64[1] = 0x8899AABBCCDDEEFF;
a.m128i_u64[0] = 0x0123456789ABCDEF;
key.m128i_u64[1] = 0x0022446688AACCEE;
key.m128i_u64[0] = 0x1133557799BBDDFF;
res = _mm_aesenclast_si128( a, key );
printf_s("Original data: 0x%016I64x%016I64x\n",
a.m128i_u64[1], a.m128i_u64[0]);
printf_s("Encoded data: 0x%016I64x%016I64x\n",
res.m128i_u64[1], res.m128i_u64[0]);
return 0;
}
Original data: 0x8899aabbccddeeff0123456789abcdef Encoded data: 0x4b04f98cf4c860f8b6dd7df25d7ab320