2011-03-30 12:46:40 +00:00
|
|
|
/*
|
|
|
|
* sha1sum - compute SHA1 or SHA2 digest
|
|
|
|
*/
|
|
|
|
#include <u.h>
|
|
|
|
#include <libc.h>
|
|
|
|
#include <libsec.h>
|
|
|
|
|
|
|
|
#pragma varargck type "M" uchar*
|
|
|
|
|
2018-09-18 22:58:22 +00:00
|
|
|
static char exitstr[ERRMAX];
|
|
|
|
|
2011-03-30 12:46:40 +00:00
|
|
|
typedef struct Sha2 Sha2;
|
|
|
|
struct Sha2 {
|
|
|
|
int bits;
|
|
|
|
int dlen;
|
|
|
|
DigestState* (*func)(uchar *, ulong, uchar *, DigestState *);
|
|
|
|
};
|
|
|
|
|
|
|
|
static Sha2 sha2s[] = {
|
|
|
|
224, SHA2_224dlen, sha2_224,
|
|
|
|
256, SHA2_256dlen, sha2_256,
|
|
|
|
384, SHA2_384dlen, sha2_384,
|
|
|
|
512, SHA2_512dlen, sha2_512,
|
|
|
|
};
|
|
|
|
|
|
|
|
static DigestState* (*shafunc)(uchar *, ulong, uchar *, DigestState *);
|
|
|
|
static int shadlen;
|
|
|
|
|
|
|
|
static int
|
|
|
|
digestfmt(Fmt *fmt)
|
|
|
|
{
|
|
|
|
char buf[SHA2_512dlen*2 + 1];
|
|
|
|
uchar *p;
|
|
|
|
int i;
|
|
|
|
|
|
|
|
p = va_arg(fmt->args, uchar*);
|
|
|
|
for(i = 0; i < shadlen; i++)
|
|
|
|
sprint(buf + 2*i, "%.2ux", p[i]);
|
|
|
|
return fmtstrcpy(fmt, buf);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
sum(int fd, char *name)
|
|
|
|
{
|
|
|
|
int n;
|
|
|
|
uchar buf[8192], digest[SHA2_512dlen];
|
|
|
|
DigestState *s;
|
|
|
|
|
|
|
|
s = (*shafunc)(nil, 0, nil, nil);
|
|
|
|
while((n = read(fd, buf, sizeof buf)) > 0)
|
|
|
|
(*shafunc)(buf, n, nil, s);
|
|
|
|
if(n < 0){
|
2018-09-18 22:58:22 +00:00
|
|
|
snprint(exitstr, sizeof(exitstr), "reading %s: %r\n", name? name: "stdin");
|
|
|
|
fprint(2, "%s", exitstr);
|
2011-03-30 12:46:40 +00:00
|
|
|
return;
|
|
|
|
}
|
|
|
|
(*shafunc)(nil, 0, digest, s);
|
|
|
|
if(name == nil)
|
|
|
|
print("%M\n", digest);
|
|
|
|
else
|
|
|
|
print("%M\t%s\n", digest, name);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
usage(void)
|
|
|
|
{
|
|
|
|
fprint(2, "usage: %s [-2 bits] [file...]\n", argv0);
|
|
|
|
exits("usage");
|
|
|
|
}
|
|
|
|
|
|
|
|
void
|
|
|
|
main(int argc, char *argv[])
|
|
|
|
{
|
|
|
|
int i, fd, bits;
|
|
|
|
Sha2 *sha;
|
|
|
|
|
|
|
|
shafunc = sha1;
|
|
|
|
shadlen = SHA1dlen;
|
|
|
|
ARGBEGIN{
|
|
|
|
case '2':
|
|
|
|
bits = atoi(EARGF(usage()));
|
|
|
|
for (sha = sha2s; sha < sha2s + nelem(sha2s); sha++)
|
|
|
|
if (sha->bits == bits)
|
|
|
|
break;
|
|
|
|
if (sha >= sha2s + nelem(sha2s))
|
|
|
|
sysfatal("unknown number of sha2 bits: %d", bits);
|
|
|
|
shafunc = sha->func;
|
|
|
|
shadlen = sha->dlen;
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
usage();
|
|
|
|
}ARGEND
|
|
|
|
|
|
|
|
fmtinstall('M', digestfmt);
|
|
|
|
|
|
|
|
if(argc == 0)
|
|
|
|
sum(0, nil);
|
|
|
|
else
|
|
|
|
for(i = 0; i < argc; i++){
|
|
|
|
fd = open(argv[i], OREAD);
|
|
|
|
if(fd < 0){
|
2018-09-18 22:58:22 +00:00
|
|
|
snprint(exitstr, sizeof(exitstr), "can't open %s: %r", argv[i]);
|
|
|
|
fprint(2, "%s: %s\n", argv0, exitstr);
|
2011-03-30 12:46:40 +00:00
|
|
|
continue;
|
|
|
|
}
|
|
|
|
sum(fd, argv[i]);
|
|
|
|
close(fd);
|
|
|
|
}
|
2018-09-18 22:58:22 +00:00
|
|
|
exits(exitstr);
|
2011-03-30 12:46:40 +00:00
|
|
|
}
|