NAME

       rdd-verify - verifies checksums and hash values generated by rdd-copy(1)

SYNOPSIS

       rdd-verify [OPTION] file1 ...

DESCRIPTION

       Rdd-verify  verifies  checksums  and  hash  values  generated  by rdd-copy(1).  Rdd stores
       checksums (Adler32 or CRC32) in files.  These files  must  be  passed  to  rdd-verify  for
       verification.

       Hash  values  (MD5  or  SHA1)  computed by rdd-copy(1) must be passed to rdd-verify on the
       command line as hexadecimal strings.

       Rdd-verify reads all input files (file1, ...) and recomputes the checksums and hash values
       that  the  user  wishes  to  verify.   The  verification  will  very  likely  fail  if the
       concatenation of the input files is different from the source  that  was  copied  by  rdd-
       copy(1).

OUTPUT

       All verification errors are reported on stderr.

OPTIONS

       -?, --help
              Print a usage message.

       -V, --version
              Report version number and exit.

       -v, --verbose
              Be verbose (more messages).

       -v, --verbose
              Be verbose (more messages).

       --checksum, --adler32 file
              Verify the Adler32 checksums stored in file.

       --crc, --crc32 file
              Verify the CRC32 checksums stored in file.

       --md5, --md5 digest
              Recompute the MD5 hash value.  It should be equal to digest.

       --sha, --sha1 digest
              Recompute the SHA1 hash value.  It should be equal to digest.

       A digest argument is a hexadecimal string.  Leading zeroes may not be omitted.

EXAMPLES

       rdd-verify --md5 0123456789abcdef0123456789abcdef disk.img

              Compute   the   MD5   hash  value  over  disk.img  and  verify  whether  it  equals
              0123456789abcdef0123456789abcdef.

       rdd-verify --adler32 checksums.a32 disk.img

              Compute the adler32 checksums over  disk.img  and  compare  each  checksum  to  the
              corresponding checksum in checksums.a32.

SEE ALSO

       rdd-copy(1)

REPORTING BUGS

       Report bugs to <rdd@holmes.nl>.

ACKNOWLEDGEMENTS

       Many  thanks  to all who reported bugs and successes, and who suggested improvements.  You
       know who you are.

COPYRIGHT

       Copyright © 2002-2003 Netherlands Forensic Institute
       This software comes with NO warranty; not  even  for  MERCHANTABILITY  or  FITNESS  FOR  A
       PARTICULAR PURPOSE.