<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN"> <HTML> <HEAD> <META http-equiv="Content-Type" content="text/html; charset=Windows-1252"> <TITLE>h (Hash) command</TITLE> <LINK href="style.css" rel="stylesheet" type="text/css"> </HEAD> <BODY> <H1>h (Hash) command</H1> <P>Calculate hash values for files.</P> <H4>Syntax</H4> <PRE class="syntax"> h [-scrc{Method}] [files] </PRE> <P>Supported methods: CRC32, CRC64, SHA1, SHA256, BLAKE2sp. Default method is CRC32.</P> <H4>Examples</H4> <PRE class="example"> 7z h a.txt </PRE> <P>calculates CRC32 for <SPAN class="filename">a.txt</SPAN>.</P> <PRE class="example"> 7z h -scrcsha256 a.iso </PRE> <P>calculates SHA256 for <SPAN class="filename">a.iso</SPAN>.</P> <PRE class="example"> 7z h * </PRE> <P>calculates CRC32 for all files in current folder and all subfolders.</P> <H4>Notes</H4> <P>7-Zip shows hash values for each file, the sum of hash values and the sum that includes all hash values of data and all hash values for filenames.</P> <P>7-Zip represents hash values for CRC32 and CRC64 as integer numbers in hex.</P> <P>7-Zip represents hash values For SHA1, SHA256 and BLAKE2sp as sequence of bytes in hex.</P> <H4>Switches that can be used with this command</H4> <P> <A href="../switches/include.htm">-i (Include)</A><BR> <A href="../switches/method.htm">-m (Method)</A><BR> <A href="../switches/recurse.htm">-r (Recurse)</A><BR> <A href="../switches/scrc.htm">-scrc (Set hash method)</A><BR> <A href="../switches/stdin.htm">-si (use StdIn)</A><BR> <A href="../switches/sns.htm">-sns (Store NTFS alternate Streams)</A><BR> <A href="../switches/shared.htm">-ssw (Compress shared files)</A><BR> <A href="../switches/exclude.htm">-x (Exclude)</A> </P> </BODY> </HTML>