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- add "check" option to MD5 and friends to compare files against known hash.

Browse Source 
PR:		bin/146541
Submitted by:	eadler
Reviewed by:	jhell@dataix.net
Approved by:	secteam (cperciva)
Approved by:	cperciva
MFC after:	3 weeks
This commit is contained in:
Eitan Adler 2011-11-13 16:35:47 +00:00
parent c9e7ce2fe1
commit 745253594b
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=227488
2 changed files with 40 additions and 8 deletions
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10
sbin/md5/md5.1
View File

@ -8,18 +8,22 @@
.Sh SYNOPSIS
.Nm md5
.Op Fl pqrtx
.Op Fl c Ar string
.Op Fl s Ar string
.Op Ar
.Nm sha1
.Op Fl pqrtx
.Op Fl c Ar string
.Op Fl s Ar string
.Op Ar
.Nm sha256
.Op Fl pqrtx
.Op Fl c Ar string
.Op Fl s Ar string
.Op Ar
.Nm rmd160
.Op Fl pqrtx
.Op Fl c Ar string
.Op Fl s Ar string
.Op Ar
.Sh DESCRIPTION
@ -73,6 +77,9 @@ precede any files named on the command line.
The hexadecimal checksum of each file listed on the command line is printed
after the options are processed.
.Bl -tag -width indent
.It Fl c Ar string
Compare files to this md5 string. (Note that this option is not yet useful
if multiple files are specified.)
.It Fl s Ar string
Print a checksum of the given
.Ar string .
@ -101,7 +108,8 @@ The
and
.Nm rmd160
utilities exit 0 on success,
and 1 if at least one of the input files could not be read.
1 if at least one of the input files could not be read,
and 2 if at least one file does not have the same hash as the -c option.
.Sh SEE ALSO
.Xr cksum 1 ,
.Xr md5 3 ,

38
sbin/md5/md5.c
View File

@ -44,6 +44,8 @@ __FBSDID("$FreeBSD$");
int qflag;
int rflag;
int sflag;
unsigned char* checkAgainst;
int checksFailed;
typedef void (DIGEST_Init)(void *);
typedef void (DIGEST_Update)(void *, const unsigned char *, size_t);
@ -138,8 +140,13 @@ main(int argc, char *argv[])
digest = 0;
failed = 0;
while ((ch = getopt(argc, argv, "pqrs:tx")) != -1)
checkAgainst = NULL;
checksFailed = 0;
while ((ch = getopt(argc, argv, "c:pqrs:tx")) != -1)
switch (ch) {
case 'c':
checkAgainst = optarg;
break;
case 'p':
MDFilter(&Algorithm[digest], 1);
break;
@ -173,12 +180,19 @@ main(int argc, char *argv[])
failed++;
} else {
if (qflag)
printf("%s\n", p);
printf("%s", p);
else if (rflag)
printf("%s %s\n", p, *argv);
printf("%s %s", p, *argv);
else
printf("%s (%s) = %s\n",
printf("%s (%s) = %s",
Algorithm[digest].name, *argv, p);
if (checkAgainst && strcmp(checkAgainst,p))
{
checksFailed++;
if (!qflag)
printf(" [ Failed ]");
}
printf("\n");
}
} while (*++argv);
} else if (!sflag && (optind == 1 || qflag || rflag))
@ -186,6 +200,8 @@ main(int argc, char *argv[])
if (failed != 0)
return (1);
if (checksFailed != 0)
return (2);
return (0);
}
@ -198,12 +214,20 @@ MDString(Algorithm_t *alg, const char *string)
size_t len = strlen(string);
char buf[HEX_DIGEST_LENGTH];
alg->Data(string,len,buf);
if (qflag)
printf("%s\n", alg->Data(string, len, buf));
printf("%s", buf);
else if (rflag)
printf("%s \"%s\"\n", alg->Data(string, len, buf), string);
printf("%s \"%s\"", buf, string);
else
printf("%s (\"%s\") = %s\n", alg->name, string, alg->Data(string, len, buf));
printf("%s (\"%s\") = %s", alg->name, string, buf);
if (checkAgainst && strcmp(buf,checkAgainst))
{
checksFailed++;
if (!qflag)
printf(" [ failed ]");
}
printf("\n");
}
/*
* Measures the time to digest TEST_BLOCK_COUNT TEST_BLOCK_LEN-byte blocks.