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123 lines
3.8 KiB
Plaintext
123 lines
3.8 KiB
Plaintext
NAME
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sha1 - Secure Hash Algorithm (SHS-1 FIPS Pub 180-1)
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SYNOPSIS
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sha1([arg1 [, val ...]])
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TYPES
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arg1 any
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val any
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return HASH or number
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DESCRIPTION
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The sha1() builtin implements the old Secure Hash Algorithm
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(SHA). The SHA is sometimes referenced as SHS. The SHA
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is a 160 bit hash.
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With no args, sha1() returns the default initial SHA-1 HASH state.
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If arg1 is a HASH state and no other val args are given, then the
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HASH state is finalized and the numeric value of the hash is given.
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If arg1 is a HASH state and one or more val args are given,
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then the val args are used to modify the arg1 HASH state.
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The new arg1 HASH state is returned.
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If arg1 is not a a HASH state, then the initial HASH is
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used and modified by arg1 and any val args supplied. The
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return value is the new HASH state.
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The following table gives a summary of actions and return values.
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Here, assume that 'h' is a HASH state:
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sha1() HASH returns initial HASH state
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sha1(h) number h is put into final form and the
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numeric value of the hash state
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sha1(x) HASH modify the initial state by hashing 'x'
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sha1(sha1(), x) HASH the same as sha1(x)
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sha1(x, y) HASH the same as sha1(sha1(x), y)
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sha1(h, x, y) HASH modify state 'h' by 'x' and then 'y'
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sha1(sha1(h,x,y)) number numeric value of the above call
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EXAMPLE
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; base(16)
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0xa
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; sha1()
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sha1 hash state
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; sha1(sha1())
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0xda39a3ee5e6b4b0d3255bfef95601890afd80709
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; sha1("x", "y", "z") == sha1("xyz")
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1
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; sha1("x", "y", "z") == sha1("xy")
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0
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; sha1(sha1("this is", 7^19-8, "a composite", 3i+4.5, "hash"))
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0xc3e1b562bf45b3bcfc055ac65b5b39cdeb6a6c55
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; x = sha1(list(1,2,3), "curds and whey", 2^21701-1, pi())
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; x
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sha1 hash state
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; sha1(x)
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0x988d2de4584b7536aa9a50a5749707a37affa1b5
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; y = sha1()
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; y = sha1(y, list(1,2,3), "curds and whey")
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; y = sha1(y, 2^21701-1)
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; y = sha1(y, pi())
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; y
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sha1 hash state
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; sha1(y)
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0x988d2de4584b7536aa9a50a5749707a37affa1b5
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LIMITS
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none
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LINK LIBRARY
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HASH* hash_init(int, HASH*);
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void hash_free(HASH*);
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HASH* hash_copy(HASH*);
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int hash_cmp(HASH*, HASH*);
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void hash_print(HASH*);
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ZVALUE hash_final(HASH*);
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HASH* hash_long(int, long, HASH*);
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HASH* hash_zvalue(int, ZVALUE, HASH*);
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HASH* hash_number(int, void*, HASH*);
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HASH* hash_complex(int, void*, HASH*);
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HASH* hash_str(int, char*, HASH*);
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HASH* hash_usb8(int, USB8*, int, HASH*);
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HASH* hash_value(int, void*, HASH*);
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SEE ALSO
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ishash, hash
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## Copyright (C) 1999-2007,2021 Landon Curt Noll
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##
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## Calc is open software; you can redistribute it and/or modify it under
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## the terms of the version 2.1 of the GNU Lesser General Public License
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## as published by the Free Software Foundation.
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##
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## Calc is distributed in the hope that it will be useful, but WITHOUT
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## ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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## or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General
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## Public License for more details.
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##
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## A copy of version 2.1 of the GNU Lesser General Public License is
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## distributed with calc under the filename COPYING-LGPL. You should have
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## received a copy with calc; if not, write to Free Software Foundation, Inc.
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## 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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##
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## Under source code control: 1997/03/23 00:01:18
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## File existed as early as: 1997
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##
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## chongo <was here> /\oo/\ http://www.isthe.com/chongo/
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## Share and enjoy! :-) http://www.isthe.com/chongo/tech/comp/calc/
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