mirror of
https://github.com/lcn2/calc.git
synced 2025-08-16 01:03:29 +03:00
127 lines
3.6 KiB
Plaintext
127 lines
3.6 KiB
Plaintext
NAME
|
|
sha - old Secure Hash Algorithm (SHS FIPS Pub 180)
|
|
|
|
SYNOPSIS
|
|
sha([arg1 [, val ...]])
|
|
|
|
TYPES
|
|
arg1 any
|
|
val any
|
|
|
|
return HASH or number
|
|
|
|
DESCRIPTION
|
|
The sha() builtin implements the old Secure Hash Algorithm
|
|
(SHA). The SHA is sometimes referenced as SHS. The SHA
|
|
is a 160 bit hash.
|
|
|
|
With no args, sha() returns the default initial SHA-1 HASH state.
|
|
|
|
If arg1 is a HASH state and no other val args are given, then the
|
|
HASH state is finalized and the numeric value of the hash is given.
|
|
|
|
If arg1 is a HASH state and one or more val args are given,
|
|
then the val args are used to modify the arg1 HASH state.
|
|
The new arg1 HASH state is returned.
|
|
|
|
If arg1 is not a a HASH state, then the initial HASH is
|
|
used and modifed by arg1 and any val args supplied. The
|
|
return value is the new HASH state.
|
|
|
|
The following table gives a summary of actions and return values.
|
|
Here, assume that 'h' is a HASH state:
|
|
|
|
sha() HASH returns initial HASH state
|
|
|
|
sha(h) number h is put into final form and the
|
|
numeric value of the hash state
|
|
|
|
sha(x) HASH modify the initial state by hashing 'x'
|
|
|
|
sha(sha(), x) HASH the same as sha(x)
|
|
|
|
sha(x, y) HASH the same as sha(sha(x), y)
|
|
|
|
sha(h, x, y) HASH modify state 'h' by 'x' and then 'y'
|
|
|
|
sha(sha(h,x,y)) number numeric value of the above call
|
|
|
|
EXAMPLE
|
|
; base(16)
|
|
0xa
|
|
|
|
; sha()
|
|
sha hash state
|
|
; sha(sha())
|
|
0xf96cea198ad1dd5617ac084a3d92c6107708c0ef
|
|
|
|
; sha("x", "y", "z") == sha("xyz")
|
|
1
|
|
; sha("x", "y", "z") == sha("xy")
|
|
0
|
|
|
|
; sha(sha("this is", 7^19-8, "a composit", 3i+4.5, "hash"))
|
|
0x21e42319a26787046c2b28b7ae70f1b54bf0ba2a
|
|
|
|
; x = sha(list(1,2,3), "curds and whey", 2^21701-1, pi())
|
|
; x
|
|
sha hash state
|
|
; sha(x)
|
|
0xc9e155522ea4a38d85340e6f1c2e36636950ea7e
|
|
|
|
; y = sha()
|
|
; y = sha(y, list(1,2,3), "curds and whey")
|
|
; y = sha(y, 2^21701-1)
|
|
; y = sha(y, pi())
|
|
; y
|
|
sha hash state
|
|
; sha(y)
|
|
0xc9e155522ea4a38d85340e6f1c2e36636950ea7e
|
|
|
|
LIMITS
|
|
none
|
|
|
|
LINK LIBRARY
|
|
HASH* hash_init(int, HASH*);
|
|
void hash_free(HASH*);
|
|
HASH* hash_copy(HASH*);
|
|
int hash_cmp(HASH*, HASH*);
|
|
void hash_print(HASH*);
|
|
ZVALUE hash_final(HASH*);
|
|
HASH* hash_long(int, long, HASH*);
|
|
HASH* hash_zvalue(int, ZVALUE, HASH*);
|
|
HASH* hash_number(int, void*, HASH*);
|
|
HASH* hash_complex(int, void*, HASH*);
|
|
HASH* hash_str(int, char*, HASH*);
|
|
HASH* hash_usb8(int, USB8*, int, HASH*);
|
|
HASH* hash_value(int, void*, HASH*);
|
|
|
|
SEE ALSO
|
|
ishash, sha1
|
|
|
|
## Copyright (C) 1999 Landon Curt Noll
|
|
##
|
|
## Calc is open software; you can redistribute it and/or modify it under
|
|
## the terms of the version 2.1 of the GNU Lesser General Public License
|
|
## as published by the Free Software Foundation.
|
|
##
|
|
## Calc is distributed in the hope that it will be useful, but WITHOUT
|
|
## ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
|
|
## or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General
|
|
## Public License for more details.
|
|
##
|
|
## A copy of version 2.1 of the GNU Lesser General Public License is
|
|
## distributed with calc under the filename COPYING-LGPL. You should have
|
|
## received a copy with calc; if not, write to Free Software Foundation, Inc.
|
|
## 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
|
|
##
|
|
## @(#) $Revision: 29.3 $
|
|
## @(#) $Id: sha,v 29.3 2006/05/07 07:25:46 chongo Exp $
|
|
## @(#) $Source: /usr/local/src/cmd/calc/help/RCS/sha,v $
|
|
##
|
|
## Under source code control: 1997/03/22 06:25:51
|
|
## File existed as early as: 1997
|
|
##
|
|
## chongo <was here> /\oo/\ http://www.isthe.com/chongo/
|
|
## Share and enjoy! :-) http://www.isthe.com/chongo/tech/comp/calc/
|