Commit 57fa68a3 authored by Nikos Mavrogiannopoulos's avatar Nikos Mavrogiannopoulos Committed by Niels Möller

Documentation of gost hash.

parent 5ff517e2
2012-11-11 Niels Möller <>
From Nikos Mavrogiannopoulos:
* nettle.texinfo (Hash functions): Added documentation for
2012-11-10 Niels Möller <>
* nettle.texinfo (nettle_hashes, nettle_ciphers): Use deftypevr,
......@@ -220,6 +220,11 @@ released under the LGPL.
Written by @value{AUTHOR}, using Peter Gutmann's SHA1 code as a model.
Released under the LGPL.
@item GOSTHASH94
The C implementation of the GOST94 message digest is written by
Aleksey Kravchenko and was ported from the rhash library by Nikos
Mavrogiannopoulos. It is released under the MIT license.
The implementation of the TWOFISH cipher is written by Ruud de Rooij.
Released under the LGPL.
......@@ -711,6 +716,43 @@ This function also resets the context in the same way as
@end deftypefun
@subsection @acronym{GOSTHASH94}
The GOST94 or GOST R 34.11-94 hash algorithm is a Soviet-era algorithm
used in Russian government standards (see @cite{RFC 4357}).
It outputs message digests of 256 bits, or 32 octets.
Nettle defines GOSTHASH94 in @file{<nettle/gosthash94.h>}.
@deftp {Context struct} {struct gosthash94_ctx}
@end deftp
@defvr Constant GOSTHASH94_DIGEST_SIZE
The size of an GOSTHASH94 digest, i.e. 32.
@end defvr
@defvr Constant GOSTHASH94_DATA_SIZE
The internal block size of GOSTHASH94, i.e., 32.
@end defvr
@deftypefun void gosthash94_init (struct gosthash94_ctx *@var{ctx})
Initialize the GOSTHASH94 state.
@end deftypefun
@deftypefun void gosthash94_update (struct gosthash94_ctx *@var{ctx}, unsigned @var{length}, const uint8_t *@var{data})
Hash some more data.
@end deftypefun
@deftypefun void gosthash94_digest (struct gosthash94_ctx *@var{ctx}, unsigned @var{length}, uint8_t *@var{digest})
Performs final processing and extracts the message digest, writing it
to @var{digest}. @var{length} may be smaller than
@code{GOSTHASH94_DIGEST_SIZE}, in which case only the first @var{length}
octets of the digest are written.
This function also resets the context in the same way as
@end deftypefun
@subsection @code{struct nettle_hash}
Nettle includes a struct including information about the supported hash
......@@ -735,6 +777,7 @@ The last three attributes are function pointers, of types
@deftypevrx {Constant Struct} {struct nettle_hash} nettle_sha256
@deftypevrx {Constant Struct} {struct nettle_hash} nettle_sha384
@deftypevrx {Constant Struct} {struct nettle_hash} nettle_sha512
@deftypevrx {Constant Struct} {struct nettle_hash} nettle_gosthash94
These are all the hash functions that Nettle implements.
@end deftypevr
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