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sha1a.f
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| Generate "SHA1" checksum for a list of files
| vim: ft=reva :
needs timer
with~ ~util
: <<< inline{ 89 C1 AD D3 C0 } ;inline
: >>> inline{ 89 C1 AD D3 C8 } ;inline
: 15and inline{ 83 e0 0f } ;inline
: blk0 ( block n -- )
cells + dup
@ 24 <<< $ff00ff00 and
over @ 8 <<< $00ff00ff and
or swap ! ;
: blk ( block n -- )
dup >r | b n (r:n)
2dup 15and cells + @ >r | block n (r:b[i&15])
2 + 15and 2dup cells + @ -rot
6 + 15and 2dup cells + @ -rot
5 + 15and cells + @ xor xor
cells + dup
@ 24 <<< $ff00ff00 and
over @ 8 <<< $00ff00ff and
or swap ! ;
5 2 + cells 64 + constant #SHACONTEXT
create sha1vector $67452301 , $EFCDAB89 , $98BADCFE , $10325476 , $C3D2E1F0 ,
: sha1init ( -- a )
#SHACONTEXT allocate
dup #SHACONTEXT zero
sha1vector over 5 cells move ;
create sha1buf 40 allot
: (sha1) ( -- a n )
sha1buf 40 blank
base @ >r hex
5 0do
| Message-Block 16 i + cells +
Message-Digest i cells +
@ 8 '0 (p.r) strlwr drop
sha1buf i cells 2* + 8 move
loop
r> base !
sha1buf 40 ;
: sha1 ( a n -- a n ) sha-init sha-update sha-final (sha1) ;
1024 32 * constant SHABUF
: sha1file ( a n -- a n )
open/r >r
SHABUF allocate
sha-init
repeat
| buf
dup SHABUF r@ read
| buf n
dup if
over swap
sha-update
true
else
false
then
while
| buf
free
r> close
sha-final (sha1) ;
: do1file ( n -- )
argv 2dup
sha1file type space space type cr
;
: dofiles argc 2 do i do1file loop ;
[IFTEST]
test: empty string
0L sha1
" da39a3ee5e6b4b0d3255bfef95601890afd80709"
cmp not ;
test: a
" a" sha1
" 86f7e437faa5a7fce15d1ddcb9eaeaea377667b8"
cmp not ;
test: abc
" abc" sha1
" a9993e364706816aba3e25717850c26c9cd0d89d"
cmp not ;
test: abcdefghijklmnopqrstuvwxyz
" abcdefghijklmnopqrstuvwxyz" sha1
" 32d10c7b8cf96570ca04ce37f2a19d84240d3a89"
cmp not ;
test: abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq
" abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq" sha1
" 84983e441c3bd26ebaae4aa1f95129e5e54670f1"
cmp not ;
[THEN]
' dofiles timer-xt
." Elapsed time: " .timer cr bye
|||
/*
** This implementation of SHA1.
*/
#include <sys/types.h>
#include <stdio.h>
#include <memory.h>
/*
** The SHA1 implementation below is adapted from:
**
** $NetBSD: sha1.c,v 1.6 2009/11/06 20:31:18 joerg Exp $
** $OpenBSD: sha1.c,v 1.9 1997/07/23 21:12:32 kstailey Exp $
**
** SHA-1 in C
** By Steve Reid <[email protected]>
** 100% Public Domain
*/
typedef struct SHA1Context SHA1Context;
struct SHA1Context {
unsigned int state[5];
unsigned int count[2];
unsigned char buffer[64];
};
/*
* blk0() and blk() perform the initial expand.
* I got the idea of expanding during the round function from SSLeay
*/
#if 0
unsigned int rolme(unsigned int value, unsigned int bits)
{
asm("rol eax, cl" : :"a"(value),"c"(bits));
asm("mov %0, eax" : =a(value));
// return value << bits
// | value >> (32-bits);
}
#else
#define rolme(value, bits) (((value) << (bits)) | ((value) >> (32 - (bits))))
#endif
#define blk0(i) (block[i] = (rolme(block[i],24)&0xFF00FF00) \
|(rolme(block[i],8)&0x00FF00FF))
#define blk(i) (block[i&15] = rolme(block[(i+13)&15]^block[(i+8)&15] \
^block[(i+2)&15]^block[i&15],1))
/*
* (R0+R1), R2, R3, R4 are the different operations (rounds) used in SHA1
*
*/
#define R0(v,w,x,y,z,i) \
z+=blk0(i)+((w&(x^y))^y)+rolme(v,5)+0x5A827999;\
w=rolme(w,30);
#define R1(v,w,x,y,z,i) \
z+=blk(i)+((w&(x^y))^y)+rolme(v,5)+0x5A827999;\
w=rolme(w,30);
#define R2(v,w,x,y,z,i) \
z+=blk(i)+(w^x^y)+rolme(v,5)+0x6ED9EBA1;\
w=rolme(w,30);
#define R3(v,w,x,y,z,i) \
z+=blk(i)+(((w|x)&y)|(w&x))+rolme(v,5)+0x8F1BBCDC;\
w=rolme(w,30);
#define R4(v,w,x,y,z,i) \
z+=blk(i)+(w^x^y)+rolme(v,5)+0xCA62C1D6;\
w=rolme(w,30);
/*
* Hash a single 512-bit block. This is the core of the algorithm.
*/
void SHA1Transform(unsigned int state[5], const unsigned char buffer[64])
{
unsigned int a, b, c, d, e;
unsigned int *block =(unsigned int *)buffer;
/* Copy context->state[] to working vars */
a = state[0];
b = state[1];
c = state[2];
d = state[3];
e = state[4];
/* 4 rounds of 20 operations each. Loop unrolled. */
R0(a,b,c,d,e, 0); R0(e,a,b,c,d, 1); R0(d,e,a,b,c, 2); R0(c,d,e,a,b, 3);
R0(b,c,d,e,a, 4); R0(a,b,c,d,e, 5); R0(e,a,b,c,d, 6); R0(d,e,a,b,c, 7);
R0(c,d,e,a,b, 8); R0(b,c,d,e,a, 9); R0(a,b,c,d,e,10); R0(e,a,b,c,d,11);
R0(d,e,a,b,c,12); R0(c,d,e,a,b,13); R0(b,c,d,e,a,14); R0(a,b,c,d,e,15);
R1(e,a,b,c,d,16); R1(d,e,a,b,c,17); R1(c,d,e,a,b,18); R1(b,c,d,e,a,19);
R2(a,b,c,d,e,20); R2(e,a,b,c,d,21); R2(d,e,a,b,c,22); R2(c,d,e,a,b,23);
R2(b,c,d,e,a,24); R2(a,b,c,d,e,25); R2(e,a,b,c,d,26); R2(d,e,a,b,c,27);
R2(c,d,e,a,b,28); R2(b,c,d,e,a,29); R2(a,b,c,d,e,30); R2(e,a,b,c,d,31);
R2(d,e,a,b,c,32); R2(c,d,e,a,b,33); R2(b,c,d,e,a,34); R2(a,b,c,d,e,35);
R2(e,a,b,c,d,36); R2(d,e,a,b,c,37); R2(c,d,e,a,b,38); R2(b,c,d,e,a,39);
R3(a,b,c,d,e,40); R3(e,a,b,c,d,41); R3(d,e,a,b,c,42); R3(c,d,e,a,b,43);
R3(b,c,d,e,a,44); R3(a,b,c,d,e,45); R3(e,a,b,c,d,46); R3(d,e,a,b,c,47);
R3(c,d,e,a,b,48); R3(b,c,d,e,a,49); R3(a,b,c,d,e,50); R3(e,a,b,c,d,51);
R3(d,e,a,b,c,52); R3(c,d,e,a,b,53); R3(b,c,d,e,a,54); R3(a,b,c,d,e,55);
R3(e,a,b,c,d,56); R3(d,e,a,b,c,57); R3(c,d,e,a,b,58); R3(b,c,d,e,a,59);
R4(a,b,c,d,e,60); R4(e,a,b,c,d,61); R4(d,e,a,b,c,62); R4(c,d,e,a,b,63);
R4(b,c,d,e,a,64); R4(a,b,c,d,e,65); R4(e,a,b,c,d,66); R4(d,e,a,b,c,67);
R4(c,d,e,a,b,68); R4(b,c,d,e,a,69); R4(a,b,c,d,e,70); R4(e,a,b,c,d,71);
R4(d,e,a,b,c,72); R4(c,d,e,a,b,73); R4(b,c,d,e,a,74); R4(a,b,c,d,e,75);
R4(e,a,b,c,d,76); R4(d,e,a,b,c,77); R4(c,d,e,a,b,78); R4(b,c,d,e,a,79);
/* Add the working vars back into context.state[] */
state[0] += a;
state[1] += b;
state[2] += c;
state[3] += d;
state[4] += e;
/* Wipe variables */
// a = b = c = d = e = 0;
}
/*
* SHA1Init - Initialize new context
*/
static void SHA1Init(SHA1Context *context){
/* SHA1 initialization constants */
memset(context, 0, sizeof(*context));
context->state[0] = 0x67452301;
context->state[1] = 0xEFCDAB89;
context->state[2] = 0x98BADCFE;
context->state[3] = 0x10325476;
context->state[4] = 0xC3D2E1F0;
}
/*
* Run your data through this.
*/
static void SHA1Update(
SHA1Context *context,
const unsigned char *data,
unsigned int len
){
unsigned int i, j;
j = context->count[0];
if ((context->count[0] += len << 3) < j)
context->count[1] += (len>>29)+1;
j = (j >> 3) & 63;
if ((j + len) > 63) {
(void)memcpy(&context->buffer[j], data, (i = 64-j));
SHA1Transform(context->state, context->buffer);
for ( ; i + 63 < len; i += 64)
SHA1Transform(context->state, &data[i]);
j = 0;
} else {
i = 0;
}
(void)memcpy(&context->buffer[j], &data[i], len - i);
}
/*
* Add padding and return the message digest.
*/
static void SHA1Final(SHA1Context *context, unsigned char digest[20]){
unsigned int i;
unsigned char finalcount[8];
for (i = 0; i < 8; i++) {
finalcount[i] = (unsigned char)((context->count[(i >= 4 ? 0 : 1)]
>> ((3-(i & 3)) * 8) ) & 255); /* Endian independent */
}
SHA1Update(context, (const unsigned char *)"\200", 1);
while ((context->count[0] & 504) != 448)
SHA1Update(context, (const unsigned char *)"\0", 1);
SHA1Update(context, finalcount, 8); /* Should cause a SHA1Transform() */
if (digest) {
for (i = 0; i < 20; i++)
digest[i] = (unsigned char)
((context->state[i>>2] >> ((3-(i & 3)) * 8) ) & 255);
}
}
/*
** Convert a digest into base-16. digest should be declared as
** "unsigned char digest[20]" in the calling function. The SHA1
** digest is stored in the first 20 bytes. zBuf should
** be "char zBuf[41]".
*/
static void DigestToBase16(unsigned char *digest, char *zBuf){
static char const zEncode[] = "0123456789abcdef";
int i, j;
for(j=i=0; i<20; i++){
int a = digest[i];
zBuf[j++] = zEncode[(a>>4)&0xf];
zBuf[j++] = zEncode[a & 0xf];
}
zBuf[j] = 0;
}
/*
** Compute the SHA1 checksum of a file on disk. Store the resulting
** checksum in the blob pCksum. pCksum is assumed to be ininitialized.
*/
char thesum [64];
char * sha1sum_file(const char *zFilename){
FILE *in;
SHA1Context ctx;
unsigned char zResult[20];
char zBuf[10240];
in = fopen(zFilename,"rb");
if( in==0 ){
return NULL;
}
SHA1Init(&ctx);
for(;;){
int n;
n = fread(zBuf, 1, sizeof(zBuf), in);
if( n<=0 ) break;
SHA1Update(&ctx, (unsigned char*)zBuf, (unsigned)n);
}
fclose(in);
SHA1Final(&ctx, zResult);
DigestToBase16(zResult, thesum);
return thesum;
}
/*
** Compute the SHA1 checksum of a zero-terminated string. The
** result is held in memory obtained from mprintf().
*/
char *sha1sum(const char *zIn){
SHA1Context ctx;
unsigned char zResult[20];
char zDigest[41];
SHA1Init(&ctx);
SHA1Update(&ctx, (unsigned const char*)zIn, strlen(zIn));
SHA1Final(&ctx, zResult);
DigestToBase16(zResult, thesum);
return thesum;
}
int main ( int argc, char ** argv)
{
int ix;
for (ix=1; ix<argc; ix++)
{
char *sum = sha1sum_file(argv[ix]);
printf("%s %s\n", sum, argv[ix]);
}
return 0;
}