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Add aesni_crypt_ecb() and use it

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Manuel Pégourié-Gonnard 2013-12-18 11:45:21 +01:00
parent 92ac76f9db
commit 5b685653ef
4 changed files with 70 additions and 1 deletions
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1
include/polarssl/aes.h
View File

@ -38,6 +38,7 @@ typedef UINT32 uint32_t;
#include <inttypes.h>
#endif
/* padlock.c and aesni.c rely on these values! */
#define AES_ENCRYPT 1
#define AES_DECRYPT 0

17
include/polarssl/aesni.h
View File

@ -38,12 +38,27 @@
#if defined(POLARSSL_HAVE_X86_64)
/**
* \brief AES_NI detection routine
* \brief AES-NI detection routine
*
* \return 1 if CPU supports AES-NI, 0 otherwise
*/
int aesni_supported( void );
/**
* \brief AES-NI AES-ECB block en(de)cryption
*
* \param ctx AES context
* \param mode AES_ENCRYPT or AES_DECRYPT
* \param input 16-byte input block
* \param output 16-byte output block
*
* \return 0 if success, 1 if operation failed
*/
int aesni_crypt_ecb( aes_context *ctx,
int mode,
const unsigned char input[16],
unsigned char output[16] );
#endif /* POLARSSL_HAVE_X86_64 */
#endif /* POLARSSL_AESNI_H */

8
library/aes.c
View File

@ -37,6 +37,9 @@
#if defined(POLARSSL_PADLOCK_C)
#include "polarssl/padlock.h"
#endif
#if defined(POLARSSL_AESNI_C)
#include "polarssl/aesni.h"
#endif
#if !defined(POLARSSL_AES_ALT)
@ -673,6 +676,11 @@ int aes_crypt_ecb( aes_context *ctx,
int i;
uint32_t *RK, X0, X1, X2, X3, Y0, Y1, Y2, Y3;
#if defined(POLARSSL_AESNI_C) && defined(POLARSSL_HAVE_X86_64)
if( aesni_supported() )
return( aesni_crypt_ecb( ctx, mode, input, output ) );
#endif
#if defined(POLARSSL_PADLOCK_C) && defined(POLARSSL_HAVE_X86)
if( aes_padlock_ace )
{

45
library/aesni.c
View File

@ -32,6 +32,7 @@
#if defined(POLARSSL_AESNI_C)
#include "polarssl/aesni.h"
#include <stdio.h>
#if defined(POLARSSL_HAVE_X86_64)
@ -56,6 +57,50 @@ int aesni_supported( void )
return( supported );
}
/*
* AES-NI AES-ECB block en(de)cryption
*/
int aesni_crypt_ecb( aes_context *ctx,
int mode,
const unsigned char input[16],
unsigned char output[16] )
{
asm( "movdqu (%3), %%xmm0 \n" // load input
"movdqu (%1), %%xmm1 \n" // load round key 0
"pxor %%xmm1, %%xmm0 \n" // round 0
"addq $16, %1 \n" // point to next round key
"subl $1, %0 \n" // normal rounds = nr - 1
"test %2, %2 \n" // mode?
"jz 2f \n" // 0 = decrypt
"1: \n" // encryption loop
"movdqu (%1), %%xmm1 \n" // load round key
"aesenc %%xmm1, %%xmm0 \n" // do round
"addq $16, %1 \n" // point to next round key
"subl $1, %0 \n" // loop
"jnz 1b \n"
"movdqu (%1), %%xmm1 \n" // load round key
"aesenclast %%xmm1, %%xmm0 \n" // last round
"jmp 3f \n"
"2: \n" // decryption loop
"movdqu (%1), %%xmm1 \n"
"aesdec %%xmm1, %%xmm0 \n"
"addq $16, %1 \n"
"subl $1, %0 \n"
"jnz 2b \n"
"movdqu (%1), %%xmm1 \n" // load round key
"aesdeclast %%xmm1, %%xmm0 \n" // last round
"3: \n"
"movdqu %%xmm0, (%4) \n" // export output
:
: "r" (ctx->nr), "r" (ctx->rk), "r" (mode), "r" (input), "r" (output)
: "memory", "cc", "xmm0", "xmm1" );
return( 0 );
}
#endif /* POLARSSL_HAVE_X86_64 */
#endif /* POLARSSL_AESNI_C */