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Experimental code to improve AES performance. Got about 25% on ia32.

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This commit is contained in:
Werner Koch 2005-08-11 16:57:29 +00:00
parent 2e38eab93c
commit 0a3eda24ee
3 changed files with 76 additions and 1 deletions
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20
cipher/cipher.c
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@ -536,7 +536,25 @@ do_cfb_encrypt( CIPHER_HANDLE c, byte *outbuf, byte *inbuf, unsigned nbytes )
*outbuf++ = (*ivp++ ^= *inbuf++);
}
/* now we can process complete blocks */
/* Now we can process complete blocks. */
#if 0
/* Experimental code. We may only use this for standard CFB
because for Phil's mode we need to save the IV of before the
last encryption - we don't want to do this in tghe fasf CFB
encryption routine. */
if (c->algo == CIPHER_ALGO_AES
&& nbytes >= blocksize
&& c->mode != CIPHER_MODE_PHILS_CFB) {
size_t n;
memcpy( c->lastiv, c->iv, blocksize );
n = (nbytes / blocksize) * blocksize;
rijndael_cfb_encrypt (&c->context.c, c->iv, outbuf, inbuf, n);
inbuf += n;
outbuf += n;
nbytes -= n;
}
#endif
while( nbytes >= blocksize ) {
int i;
/* encrypt the IV (and save the current one) */