2020-09-09 22:39:11 +03:00
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#ifndef AESNIENCECB_H
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#define AESNIENCECB_H
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#include <wmmintrin.h>
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namespace {
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/* Note – the length of the output buffer is assumed to be a multiple of 16 bytes */
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void AES_ECB_encrypt(const unsigned char *in, //pointer to the PLAINTEXT
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unsigned char *out, //pointer to the CIPHERTEXT buffer
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unsigned long length, //text length in bytes
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const char *key, //pointer to the expanded key schedule
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int number_of_rounds) //number of AES rounds 10,12 or 14
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{
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__m128i tmp;
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unsigned long i;
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int j;
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if(length%16)
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length = length/16+1;
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else
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length = length/16;
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for(i = 0; i < length; i++) {
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tmp = _mm_loadu_si128 (&((__m128i*)in)[i]);
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tmp = _mm_xor_si128 (tmp,((__m128i*)key)[0]);
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for(j=1; j <number_of_rounds; j++) {
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tmp = _mm_aesenc_si128 (tmp, ((__m128i*)key)[j]);
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}
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tmp = _mm_aesenclast_si128 (tmp,((__m128i*)key)[j]);
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_mm_storeu_si128 (&((__m128i*)out)[i],tmp);
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}
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}
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#if 0
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void AES_ECB_decrypt(const unsigned char *in, //pointer to the CIPHERTEXT
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unsigned char *out, //pointer to the DECRYPTED TEXT buffer
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unsigned long length, //text length in bytes
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const char *key, //pointer to the expanded key schedule
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int number_of_rounds) //number of AES rounds 10,12 or 14
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{
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__m128i tmp;
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unsigned long i;
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int j;
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if(length%16)
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length = length/16+1;
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else
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length = length/16;
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for(i = 0; i < length; i++) {
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tmp = _mm_loadu_si128 (&((__m128i*)in)[i]);
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tmp = _mm_xor_si128 (tmp,((__m128i*)key)[0]);
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for(j = 1; j < number_of_rounds; j++) {
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tmp = _mm_aesdec_si128 (tmp,((__m128i*)key)[j]);
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}
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tmp = _mm_aesdeclast_si128 (tmp,((__m128i*)key)[j]);
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_mm_storeu_si128 (&((__m128i*)out)[i],tmp);
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}
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}
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#endif
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}
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#endif // AESNIENCECB_H
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