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avr-crypto-lib
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squeezing out a little more speed

This commit is contained in:
bg 2009-01-14 18:44:53 +00:00
parent b3daeff2bc
commit 398d051849
2 changed files with 40 additions and 29 deletions
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37
aes_enc-asm.S
View File

@ -207,7 +207,7 @@ aes_encrypt_core:
eor T1, xREDUCER
3:
eor T1, r1
eor T1, ST01
eor ST01, T1
mov T2, ST02
eor T2, ST03
@ -216,7 +216,7 @@ aes_encrypt_core:
eor T2, xREDUCER
3:
eor T2, r1
eor T2, ST02
eor ST02, T2
mov T3, ST03
eor T3, ST00
@ -225,13 +225,9 @@ aes_encrypt_core:
eor T3, xREDUCER
3:
eor T3, r1
eor T3, ST03
eor ST03, T3
mov ST00, T0
mov ST01, T1
mov ST02, T2
mov ST03, T3
mov r1, ST10
eor r1, ST11
@ -254,7 +250,7 @@ aes_encrypt_core:
eor T1, xREDUCER
3:
eor T1, r1
eor T1, ST11
eor ST11, T1
mov T2, ST12
eor T2, ST13
@ -263,7 +259,7 @@ aes_encrypt_core:
eor T2, xREDUCER
3:
eor T2, r1
eor T2, ST12
eor ST12, T2
mov T3, ST13
eor T3, ST10
@ -272,12 +268,9 @@ aes_encrypt_core:
eor T3, xREDUCER
3:
eor T3, r1
eor T3, ST13
eor ST13, T3
mov ST10, T0
mov ST11, T1
mov ST12, T2
mov ST13, T3
mov r1, ST20
eor r1, ST21
@ -300,7 +293,7 @@ aes_encrypt_core:
eor T1, xREDUCER
3:
eor T1, r1
eor T1, ST21
eor ST21, T1
mov T2, ST22
eor T2, ST23
@ -309,7 +302,7 @@ aes_encrypt_core:
eor T2, xREDUCER
3:
eor T2, r1
eor T2, ST22
eor ST22, T2
mov T3, ST23
eor T3, ST20
@ -318,12 +311,9 @@ aes_encrypt_core:
eor T3, xREDUCER
3:
eor T3, r1
eor T3, ST23
eor ST23, T3
mov ST20, T0
mov ST21, T1
mov ST22, T2
mov ST23, T3
mov r1, ST30
eor r1, ST31
@ -346,7 +336,7 @@ aes_encrypt_core:
eor T1, xREDUCER
3:
eor T1, r1
eor T1, ST31
eor ST31, T1
mov T2, ST32
eor T2, ST33
@ -355,7 +345,7 @@ aes_encrypt_core:
eor T2, xREDUCER
3:
eor T2, r1
eor T2, ST32
eor ST32, T2
mov T3, ST33
eor T3, ST30
@ -364,12 +354,9 @@ aes_encrypt_core:
eor T3, xREDUCER
3:
eor T3, r1
eor T3, ST33
eor ST33, T3
mov ST30, T0
mov ST31, T1
mov ST32, T2
mov ST33, T3
/* mix colums (rows) done */

32
host/gf256_table_gen.c
View File

@ -43,6 +43,23 @@ char* fmt_strings[]={"%d", "%3d",
"0x%X", "0x%2.2X",
"0%o", "0%3o"};
void print_help(void){
puts(
"gf256_table_gen [-cCbBdhoaApP] [-l min] [-u max]\n"
" [-f formatstring] [-o file] -r reducer value {values} \n"
"\n"
" -c/-C turn C-header on/off (default: on)\n"
" -b/-B turn braces on/off (defaul: on)\n"
" -d/-h/-8 print values in decimal/hexadecimal/octal (default: hexadecimal)\n"
" -a/-a turn alignment on/off (default: on)\n"
" -p/-P turn base prefix on/off (default: on)\n"
" -r reducer reducer is the reduction polynomial represented as numeric value\n"
" -l min starting value for multiplication table (default: 0)\n"
" -u max upper limit value for multiplication table (default: 255)\n"
" -f formatstring string for formating the output of a singel multiplicxation\n"
" -o file outputfile\n"
}
int main(int argc, char** argv){
int i,j;
int c;
@ -65,6 +82,7 @@ int main(int argc, char** argv){
/* These options don't set a flag.
We distinguish them by their indices. */
{"help", no_argument , 0, '?'},
{"reducer", required_argument, 0, 'r'},
{"min", required_argument, 0, 'l'},
{"max", required_argument, 0, 'u'},
@ -76,7 +94,7 @@ int main(int argc, char** argv){
unsigned long ul_a;
int columns=8;
unsigned long ul_reducer=0x1b, max=0xff, min=0x00;
unsigned long ul_reducer=0x00, max=0xff, min=0x00;
uint8_t reducer, a;
char** eptr;
FILE* of = stdout;
@ -90,7 +108,7 @@ int main(int argc, char** argv){
case 'B': print_braces=0; break;
case 'h': print_base = 1; break;
case 'd': print_base = 0; break;
case 'o': print_base = 2; break;
case '8': print_base = 2; break;
case 'a': print_align =1; break;
case 'A': print_align =0; break;
case 'p': print_prefix=1; break;
@ -117,10 +135,16 @@ int main(int argc, char** argv){
}
break;
case 'f': fmt = optarg; break;
default: break;
case '?':
default:
print_help();
break;
}
}
reducer = ul_reducer&0xff;
if(!reducer = ul_reducer&0xff){
fprintf(stderr, "You must specify a reductionpolynomial!\n", argv[i]);
return -1;
}
if(!fmt)
fmt = fmt_strings[print_prefix*6+print_base*2+print_align];