mirror of
https://github.com/QuasarApp/Qt-AES.git
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61 lines
1.9 KiB
C
Executable File
61 lines
1.9 KiB
C
Executable File
#include <wmmintrin.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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void AES_CBC_encrypt(const unsigned char *in,
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unsigned char *out,
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unsigned char ivec[16],
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unsigned long length,
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const char *key,
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int number_of_rounds)
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{
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__m128i feedback,data;
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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 length /=16;
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feedback=_mm_loadu_si128 ((__m128i*)ivec);
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for(i=0; i < length; i++) {
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data = _mm_loadu_si128 (&((__m128i*)in)[i]);
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feedback = _mm_xor_si128 (data,feedback);
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feedback = _mm_xor_si128 (feedback,((__m128i*)key)[0]);
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for(j=1; j <number_of_rounds; j++)
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feedback = _mm_aesenc_si128 (feedback,((__m128i*)key)[j]);
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feedback = _mm_aesenclast_si128 (feedback,((__m128i*)key)[j]); _mm_storeu_si128 (&((__m128i*)out)[i],feedback);
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}
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}
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void AES_CBC_decrypt(const unsigned char *in,
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unsigned char *out,
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unsigned char ivec[16],
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unsigned long length,
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const char *key,
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int number_of_rounds)
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{
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__m128i data,feedback,last_in;
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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 length /=16;
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feedback=_mm_loadu_si128 ((__m128i*)ivec);
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for(i=0; i < length; i++) {
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last_in=_mm_loadu_si128 (&((__m128i*)in)[i]);
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data = _mm_xor_si128 (last_in,((__m128i*)key)[0]);
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for(j=1; j <number_of_rounds; j++) {
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data = _mm_aesdec_si128 (data,((__m128i*)key)[j]);
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}
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data = _mm_aesdeclast_si128 (data,((__m128i*)key)[j]);
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data = _mm_xor_si128 (data,feedback);
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_mm_storeu_si128 (&((__m128i*)out)[i],data);
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feedback=last_in;
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}
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}
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#ifdef __cplusplus
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}
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#endif
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