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| author | Niels Möller <nisse@lysator.liu.se> | 2022-07-05 19:38:45 +0200 |
|---|---|---|
| committer | Niels Möller <nisse@lysator.liu.se> | 2022-07-05 19:38:45 +0200 |
| commit | 12bb2223428be4326c580b1b1f8e9916a2839cb1 (patch) | |
| tree | 951f337d7866843ec9638c39e51a1f528bcfc40c | |
| parent | 17bbcd3b021cca32744fc7aadee33de72c39b46b (diff) | |
| download | nettle-12bb2223428be4326c580b1b1f8e9916a2839cb1.tar.gz | |
New file md-internal.h
| -rw-r--r-- | ChangeLog | 4 | ||||
| -rw-r--r-- | Makefile.in | 2 | ||||
| -rw-r--r-- | md-internal.h | 57 |
3 files changed, 62 insertions, 1 deletions
@@ -1,3 +1,7 @@ +2022-07-05 Niels Möller <nisse@lysator.liu.se> + + * md-internal.h (MD_FILL_OR_RETURN): New file, new macro. + 2022-06-20 Niels Möller <nisse@lysator.liu.se> * testsuite/sha1-test.c (test_sha1_compress): New function. diff --git a/Makefile.in b/Makefile.in index 65911e2a..ba536407 100644 --- a/Makefile.in +++ b/Makefile.in @@ -260,7 +260,7 @@ DISTFILES = $(SOURCES) $(HEADERS) getopt.h getopt_int.h \ aes-internal.h block-internal.h blowfish-internal.h camellia-internal.h \ ghash-internal.h gost28147-internal.h poly1305-internal.h \ serpent-internal.h cast128_sboxes.h desinfo.h desCode.h \ - ripemd160-internal.h sha2-internal.h \ + ripemd160-internal.h md-internal.h sha2-internal.h \ memxor-internal.h nettle-internal.h nettle-write.h \ ctr-internal.h chacha-internal.h sha3-internal.h \ salsa20-internal.h umac-internal.h hogweed-internal.h \ diff --git a/md-internal.h b/md-internal.h new file mode 100644 index 00000000..fe520c63 --- /dev/null +++ b/md-internal.h @@ -0,0 +1,57 @@ +/* md-internal.h + + Copyright (C) 2001, 2010, 2022 Niels Möller + + This file is part of GNU Nettle. + + GNU Nettle is free software: you can redistribute it and/or + modify it under the terms of either: + + * the GNU Lesser General Public License as published by the Free + Software Foundation; either version 3 of the License, or (at your + option) any later version. + + or + + * the GNU General Public License as published by the Free + Software Foundation; either version 2 of the License, or (at your + option) any later version. + + or both in parallel, as here. + + GNU Nettle 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 + General Public License for more details. + + You should have received copies of the GNU General Public License and + the GNU Lesser General Public License along with this program. If + not, see http://www.gnu.org/licenses/. +*/ + +#ifndef NETTLE_MD_INTERNAL_H_INCLUDED +#define NETTLE_MD_INTERNAL_H_INCLUDED + +/* Internal helper macros for Merkle-Damgård hash functions. Assumes the context + structs includes the following fields: + + uint8_t block[...]; // Buffer holding one block + unsigned int index; // Index into block +*/ + +#define MD_FILL_OR_RETURN(ctx, length, data) \ + do { \ + unsigned __md_left = sizeof((ctx)->block) - (ctx)->index; \ + if ((length) < __md_left) \ + { \ + memcpy((ctx)->block + (ctx)->index, (data), (length)); \ + (ctx)->index += (length); \ + return; \ + } \ + memcpy((ctx)->block + (ctx)->index, (data), __md_left); \ + (data) += __md_left; \ + (length) -= __md_left; \ + (ctx)->index = 0; \ + } while(0) + +#endif /* NETTLE_MD_INTERNAL_H_INCLUDED */ |