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More IGE speedup.

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This commit is contained in:
Ben Laurie 2007-05-13 15:14:38 +00:00
parent 5f09d0ecc2
commit 69ab085290
3 changed files with 108 additions and 92 deletions
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3
CHANGES
View File

@ -501,6 +501,9 @@
Changes between 0.9.8e and 0.9.8f [xx XXX xxxx]
*) Squeeze another 10% out of IGE mode when in != out.
[Ben Laurie]
*) AES IGE mode speedup.
[Dean Gaudet (Google)]

6
apps/speed.c
View File

@ -1703,7 +1703,7 @@ int MAIN(int argc, char **argv)
print_message(names[D_IGE_128_AES],c[D_IGE_128_AES][j],lengths[j]);
Time_F(START);
for (count=0,run=1; COND(c[D_IGE_128_AES][j]); count++)
AES_ige_encrypt(buf,buf,
AES_ige_encrypt(buf,buf2,
(unsigned long)lengths[j],&aes_ks1,
iv,AES_ENCRYPT);
d=Time_F(STOP);
@ -1717,7 +1717,7 @@ int MAIN(int argc, char **argv)
print_message(names[D_IGE_192_AES],c[D_IGE_192_AES][j],lengths[j]);
Time_F(START);
for (count=0,run=1; COND(c[D_IGE_192_AES][j]); count++)
AES_ige_encrypt(buf,buf,
AES_ige_encrypt(buf,buf2,
(unsigned long)lengths[j],&aes_ks2,
iv,AES_ENCRYPT);
d=Time_F(STOP);
@ -1731,7 +1731,7 @@ int MAIN(int argc, char **argv)
print_message(names[D_IGE_256_AES],c[D_IGE_256_AES][j],lengths[j]);
Time_F(START);
for (count=0,run=1; COND(c[D_IGE_256_AES][j]); count++)
AES_ige_encrypt(buf,buf,
AES_ige_encrypt(buf,buf2,
(unsigned long)lengths[j],&aes_ks3,
iv,AES_ENCRYPT);
d=Time_F(STOP);

191
crypto/aes/aes_ige.c
View File

@ -54,22 +54,6 @@
#include <openssl/aes.h>
#include "aes_locl.h"
/*
static void hexdump(FILE *f,const char *title,const unsigned char *s,int l)
{
int n=0;
fprintf(f,"%s",title);
for( ; n < l ; ++n)
{
if((n%16) == 0)
fprintf(f,"\n%04x",n);
fprintf(f," %02x",s[n]);
}
fprintf(f,"\n");
}
*/
#define N_WORDS (AES_BLOCK_SIZE / sizeof(unsigned long))
typedef struct {
unsigned long data[N_WORDS];
@ -95,73 +79,123 @@ void AES_ige_encrypt(const unsigned char *in, unsigned char *out,
unsigned char *ivec, const int enc)
{
unsigned long n;
unsigned long len;
aes_block_t tmp, tmp2;
aes_block_t iv;
aes_block_t iv2;
unsigned long len;
OPENSSL_assert(in && out && key && ivec);
OPENSSL_assert((AES_ENCRYPT == enc)||(AES_DECRYPT == enc));
OPENSSL_assert((length%AES_BLOCK_SIZE) == 0);
len = length / AES_BLOCK_SIZE;
load_block(iv, ivec);
load_block(iv2, ivec + AES_BLOCK_SIZE);
len = length / AES_BLOCK_SIZE;
if (AES_ENCRYPT == enc)
{
/* XXX: Do a separate case for when in != out (strictly should
check for overlap, too) */
while (len)
if (in != out)
{
load_block(tmp, in);
/* hexdump(stdout, "in", in, AES_BLOCK_SIZE); */
/* hexdump(stdout, "iv", iv, AES_BLOCK_SIZE); */
for(n=0 ; n < N_WORDS; ++n)
tmp2.data[n] = tmp.data[n] ^ iv.data[n];
/* hexdump(stdout, "in ^ iv", out, AES_BLOCK_SIZE); */
AES_encrypt((unsigned char *)tmp2.data, (unsigned char *)tmp2.data, key);
/* hexdump(stdout,"enc", out, AES_BLOCK_SIZE); */
/* hexdump(stdout,"iv2", iv2, AES_BLOCK_SIZE); */
for(n=0 ; n < N_WORDS; ++n)
tmp2.data[n] ^= iv2.data[n];
store_block(out, tmp2);
/* hexdump(stdout,"out", out, AES_BLOCK_SIZE); */
iv = tmp2;
iv2 = tmp;
--len;
in += AES_BLOCK_SIZE;
out += AES_BLOCK_SIZE;
aes_block_t *ivp = (aes_block_t *)ivec;
aes_block_t *iv2p = (aes_block_t *)(ivec + AES_BLOCK_SIZE);
while (len)
{
aes_block_t *inp = (aes_block_t *)in;
aes_block_t *outp = (aes_block_t *)out;
for(n=0 ; n < N_WORDS; ++n)
outp->data[n] = inp->data[n] ^ ivp->data[n];
AES_encrypt((unsigned char *)outp->data, (unsigned char *)outp->data, key);
for(n=0 ; n < N_WORDS; ++n)
outp->data[n] ^= iv2p->data[n];
ivp = outp;
iv2p = inp;
--len;
in += AES_BLOCK_SIZE;
out += AES_BLOCK_SIZE;
}
memcpy(ivec, ivp->data, AES_BLOCK_SIZE);
memcpy(ivec + AES_BLOCK_SIZE, iv2p->data, AES_BLOCK_SIZE);
}
else
{
aes_block_t tmp, tmp2;
aes_block_t iv;
aes_block_t iv2;
load_block(iv, ivec);
load_block(iv2, ivec + AES_BLOCK_SIZE);
while (len)
{
load_block(tmp, in);
for(n=0 ; n < N_WORDS; ++n)
tmp2.data[n] = tmp.data[n] ^ iv.data[n];
AES_encrypt((unsigned char *)tmp2.data, (unsigned char *)tmp2.data, key);
for(n=0 ; n < N_WORDS; ++n)
tmp2.data[n] ^= iv2.data[n];
store_block(out, tmp2);
iv = tmp2;
iv2 = tmp;
--len;
in += AES_BLOCK_SIZE;
out += AES_BLOCK_SIZE;
}
memcpy(ivec, iv.data, AES_BLOCK_SIZE);
memcpy(ivec + AES_BLOCK_SIZE, iv2.data, AES_BLOCK_SIZE);
}
memcpy(ivec, iv.data, AES_BLOCK_SIZE);
memcpy(ivec + AES_BLOCK_SIZE, iv2.data, AES_BLOCK_SIZE);
}
else
{
while (len)
if(in != out)
{
load_block(tmp, in);
tmp2 = tmp;
/* hexdump(stdout, "in", in, AES_BLOCK_SIZE); */
/* hexdump(stdout, "iv2", iv2, AES_BLOCK_SIZE); */
for(n=0 ; n < N_WORDS; ++n)
tmp.data[n] ^= iv2.data[n];
/* hexdump(stdout, "in ^ iv2", tmp, AES_BLOCK_SIZE); */
AES_decrypt((unsigned char *)tmp.data, (unsigned char *)tmp.data, key);
/* hexdump(stdout, "dec", out, AES_BLOCK_SIZE); */
/* hexdump(stdout, "iv", iv, AES_BLOCK_SIZE); */
for(n=0 ; n < N_WORDS; ++n)
tmp.data[n] ^= iv.data[n];
store_block(out, tmp);
/* hexdump(stdout, "out", out, AES_BLOCK_SIZE); */
iv = tmp2;
iv2 = tmp;
--len;
in += AES_BLOCK_SIZE;
out += AES_BLOCK_SIZE;
aes_block_t *ivp = (aes_block_t *)ivec;
aes_block_t *iv2p = (aes_block_t *)(ivec + AES_BLOCK_SIZE);
while (len)
{
aes_block_t tmp;
aes_block_t *inp = (aes_block_t *)in;
aes_block_t *outp = (aes_block_t *)out;
for(n=0 ; n < N_WORDS; ++n)
tmp.data[n] = inp->data[n] ^ iv2p->data[n];
AES_decrypt((unsigned char *)tmp.data, (unsigned char *)outp->data, key);
for(n=0 ; n < N_WORDS; ++n)
outp->data[n] ^= ivp->data[n];
ivp = inp;
iv2p = outp;
--len;
in += AES_BLOCK_SIZE;
out += AES_BLOCK_SIZE;
}
memcpy(ivec, ivp->data, AES_BLOCK_SIZE);
memcpy(ivec + AES_BLOCK_SIZE, iv2p->data, AES_BLOCK_SIZE);
}
else
{
aes_block_t tmp, tmp2;
aes_block_t iv;
aes_block_t iv2;
load_block(iv, ivec);
load_block(iv2, ivec + AES_BLOCK_SIZE);
while (len)
{
load_block(tmp, in);
tmp2 = tmp;
for(n=0 ; n < N_WORDS; ++n)
tmp.data[n] ^= iv2.data[n];
AES_decrypt((unsigned char *)tmp.data, (unsigned char *)tmp.data, key);
for(n=0 ; n < N_WORDS; ++n)
tmp.data[n] ^= iv.data[n];
store_block(out, tmp);
iv = tmp2;
iv2 = tmp;
--len;
in += AES_BLOCK_SIZE;
out += AES_BLOCK_SIZE;
}
memcpy(ivec, iv.data, AES_BLOCK_SIZE);
memcpy(ivec + AES_BLOCK_SIZE, iv2.data, AES_BLOCK_SIZE);
}
memcpy(ivec, iv.data, AES_BLOCK_SIZE);
memcpy(ivec + AES_BLOCK_SIZE, iv2.data, AES_BLOCK_SIZE);
}
}
@ -200,17 +234,11 @@ void AES_bi_ige_encrypt(const unsigned char *in, unsigned char *out,
iv2 = ivec + AES_BLOCK_SIZE;
while (len >= AES_BLOCK_SIZE)
{
/* hexdump(stdout, "in", in, AES_BLOCK_SIZE); */
/* hexdump(stdout, "iv", iv, AES_BLOCK_SIZE); */
for(n=0 ; n < AES_BLOCK_SIZE ; ++n)
out[n] = in[n] ^ iv[n];
/* hexdump(stdout, "in ^ iv", out, AES_BLOCK_SIZE); */
AES_encrypt(out, out, key);
/* hexdump(stdout,"enc", out, AES_BLOCK_SIZE); */
/* hexdump(stdout,"iv2", iv2, AES_BLOCK_SIZE); */
for(n=0 ; n < AES_BLOCK_SIZE ; ++n)
out[n] ^= iv2[n];
/* hexdump(stdout,"out", out, AES_BLOCK_SIZE); */
iv = out;
memcpy(prev, in, AES_BLOCK_SIZE);
iv2 = prev;
@ -226,8 +254,6 @@ void AES_bi_ige_encrypt(const unsigned char *in, unsigned char *out,
while(len >= AES_BLOCK_SIZE)
{
out -= AES_BLOCK_SIZE;
/* hexdump(stdout, "intermediate", out, AES_BLOCK_SIZE); */
/* hexdump(stdout, "iv", iv, AES_BLOCK_SIZE); */
/* XXX: reduce copies by alternating between buffers */
memcpy(tmp, out, AES_BLOCK_SIZE);
for(n=0 ; n < AES_BLOCK_SIZE ; ++n)
@ -258,17 +284,11 @@ void AES_bi_ige_encrypt(const unsigned char *in, unsigned char *out,
out -= AES_BLOCK_SIZE;
memcpy(tmp, in, AES_BLOCK_SIZE);
memcpy(tmp2, in, AES_BLOCK_SIZE);
/* hexdump(stdout, "in", in, AES_BLOCK_SIZE); */
/* hexdump(stdout, "iv2", iv2, AES_BLOCK_SIZE); */
for(n=0 ; n < AES_BLOCK_SIZE ; ++n)
tmp[n] ^= iv2[n];
/* hexdump(stdout, "in ^ iv2", tmp, AES_BLOCK_SIZE); */
AES_decrypt(tmp, out, key);
/* hexdump(stdout, "dec", out, AES_BLOCK_SIZE); */
/* hexdump(stdout, "iv", iv, AES_BLOCK_SIZE); */
for(n=0 ; n < AES_BLOCK_SIZE ; ++n)
out[n] ^= iv[n];
/* hexdump(stdout, "out", out, AES_BLOCK_SIZE); */
memcpy(tmp3, tmp2, AES_BLOCK_SIZE);
iv = tmp3;
iv2 = out;
@ -283,17 +303,11 @@ void AES_bi_ige_encrypt(const unsigned char *in, unsigned char *out,
{
memcpy(tmp, out, AES_BLOCK_SIZE);
memcpy(tmp2, out, AES_BLOCK_SIZE);
/* hexdump(stdout, "intermediate", out, AES_BLOCK_SIZE); */
/* hexdump(stdout, "iv2", iv2, AES_BLOCK_SIZE); */
for(n=0 ; n < AES_BLOCK_SIZE ; ++n)
tmp[n] ^= iv2[n];
/* hexdump(stdout, "out ^ iv2", tmp, AES_BLOCK_SIZE); */
AES_decrypt(tmp, out, key);
/* hexdump(stdout, "dec", out, AES_BLOCK_SIZE); */
/* hexdump(stdout, "iv", ivec, AES_BLOCK_SIZE); */
for(n=0 ; n < AES_BLOCK_SIZE ; ++n)
out[n] ^= iv[n];
/* hexdump(stdout, "out", out, AES_BLOCK_SIZE); */
memcpy(tmp3, tmp2, AES_BLOCK_SIZE);
iv = tmp3;
iv2 = out;
@ -301,6 +315,5 @@ void AES_bi_ige_encrypt(const unsigned char *in, unsigned char *out,
in += AES_BLOCK_SIZE;
out += AES_BLOCK_SIZE;
}
}
}