diff options
Diffstat (limited to '')
| -rw-r--r-- | .gitignore | 14 | ||||
| -rw-r--r-- | COPYING | 16 | ||||
| -rw-r--r-- | DEPENDENCIES | 8 | ||||
| -rw-r--r-- | LICENSE | 670 | ||||
| -rw-r--r-- | Makefile | 226 | ||||
| -rw-r--r-- | arg.h | 45 | ||||
| -rw-r--r-- | config.mk | 10 | ||||
| -rw-r--r-- | krandom.c | 191 | ||||
| -rw-r--r-- | src/completion | 33 | ||||
| -rw-r--r-- | src/krandom.c | 218 |
10 files changed, 274 insertions, 1157 deletions
@@ -1,15 +1,5 @@ -_/ -bin/ -obj/ -\#*\# -.* -!.git* *~ -*.bak -*.swo -*.swp +*\#* *.o -*.out *.su -*.gch - +/krandom diff --git a/COPYING b/COPYING deleted file mode 100644 index 4177e6e..0000000 --- a/COPYING +++ /dev/null @@ -1,16 +0,0 @@ -krandom – Keccak-based userspace pseudorandom number generator -Copyright © 2014 Mattias Andrée (maandree@member.fsf.org) - -This program is free software: you can redistribute it and/or modify -it under the terms of the GNU Affero General Public License as published by -the Free Software Foundation, either version 3 of the License, or -(at your option) any later version. - -This program 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 Affero General Public License for more details. - -You should have received a copy of the GNU Affero General Public License -along with this program. If not, see <http://www.gnu.org/licenses/>. - diff --git a/DEPENDENCIES b/DEPENDENCIES index 8ef4610..b7fbbe5 100644 --- a/DEPENDENCIES +++ b/DEPENDENCIES @@ -1,18 +1,13 @@ RUNTIME DEPENDENCIES: libkeccak - argparser libc BUILD DEPENDENCIES: libkeccak - argparser libc - auto-auto-complete (opt-out, for shell tab-completion) - texinfo (opt-out, for info, pdf, dvi and ps manuals) - texlive-core (opt-in, for pdf, dvi and ps manuals) gcc make coreutils @@ -21,6 +16,3 @@ BUILD DEPENDENCIES: DEPENDENCY SOURCES: libkeccak https://github.com/maandree/libkeccak - argparser https://github.com/maandree/argparser - auto-auto-complete https://github.com/maandree/auto-auto-complete - @@ -1,661 +1,15 @@ - GNU AFFERO GENERAL PUBLIC LICENSE - Version 3, 19 November 2007 +ISC License - Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/> - Everyone is permitted to copy and distribute verbatim copies - of this license document, but changing it is not allowed. +© 2014, 2021 Mattias Andrée <maandree@kth.se> - Preamble +Permission to use, copy, modify, and/or distribute this software for any +purpose with or without fee is hereby granted, provided that the above +copyright notice and this permission notice appear in all copies. - The GNU Affero General Public License is a free, copyleft license for -software and other kinds of works, specifically designed to ensure -cooperation with the community in the case of network server software. - - The licenses for most software and other practical works are designed -to take away your freedom to share and change the works. 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It is safest -to attach them to the start of each source file to most effectively -state the exclusion of warranty; and each file should have at least -the "copyright" line and a pointer to where the full notice is found. - - <one line to give the program's name and a brief idea of what it does.> - Copyright (C) <year> <name of author> - - This program is free software: you can redistribute it and/or modify - it under the terms of the GNU Affero General Public License as published by - the Free Software Foundation, either version 3 of the License, or - (at your option) any later version. - - This program 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 Affero General Public License for more details. - - You should have received a copy of the GNU Affero General Public License - along with this program. If not, see <http://www.gnu.org/licenses/>. - -Also add information on how to contact you by electronic and paper mail. - - If your software can interact with users remotely through a computer -network, you should also make sure that it provides a way for users to -get its source. For example, if your program is a web application, its -interface could display a "Source" link that leads users to an archive -of the code. There are many ways you could offer source, and different -solutions will be better for different programs; see section 13 for the -specific requirements. - - You should also get your employer (if you work as a programmer) or school, -if any, to sign a "copyright disclaimer" for the program, if necessary. -For more information on this, and how to apply and follow the GNU AGPL, see -<http://www.gnu.org/licenses/>. +THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES +WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF +MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR +ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES +WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN +ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF +OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. @@ -1,222 +1,24 @@ -# Copyright © 2014 Mattias Andrée (maandree@member.fsf.org) -# -# Copying and distribution of this file, with or without modification, -# are permitted in any medium without royalty provided the copyright -# notice and this notice are preserved. This file is offered as-is, -# without any warranty. -# -# [GNU All Permissive License] +.POSIX: +CONFIGFILE = config.mk +include $(CONFIGFILE) -# The package path prefix, if you want to install to another root, set DESTDIR to that root -PREFIX = /usr -# The command path excluding prefix -BIN = /bin -# The resource path excluding prefix -DATA = /share -# The command path including prefix -BINDIR = $(PREFIX)$(BIN) -# The resource path including prefix -DATADIR = $(PREFIX)$(DATA) -# The generic documentation path including prefix -DOCDIR = $(DATADIR)/doc -# The man page documentation path including prefix -MANDIR = $(DATADIR)/man -# The info manual documentation path including prefix -INFODIR = $(DATADIR)/info -# The license base path including prefix -LICENSEDIR = $(DATADIR)/licenses +all: krandom -# The name of the package as it should be installed -PKGNAME = krandom -# The name of the command as it should be installed -COMMAND = krandom +krandom: krandom.o + $(CC) -o $@ krandom.o $(LDFLAGS) +krandom.o: krandom.c arg.h + $(CC) -c -o $@ krandom.c $(CFLAGS) $(CPPFLAGS) -WARN = -Wall -Wextra -pedantic -Wdouble-promotion -Wformat=2 -Winit-self -Wmissing-include-dirs \ - -Wtrampolines -Wfloat-equal -Wshadow -Wmissing-prototypes -Wmissing-declarations \ - -Wredundant-decls -Wnested-externs -Winline -Wno-variadic-macros -Wswitch-default \ - -Wpadded -Wsync-nand -Wunsafe-loop-optimizations -Wcast-align -Wstrict-overflow \ - -Wdeclaration-after-statement -Wundef -Wbad-function-cast -Wcast-qual -Wlogical-op \ - -Wstrict-prototypes -Wold-style-definition -Wpacked -Wvector-operation-performance \ - -Wunsuffixed-float-constants -Wsuggest-attribute=const -Wsuggest-attribute=noreturn \ - -Wsuggest-attribute=pure -Wsuggest-attribute=format -Wnormalized=nfkc +install: krandom + mkdir -p -- "$(DESTDIR)$(PREFIX)/bin" + cp -- krandom "$(DESTDIR)$(PREFIX)/bin/" -LDOPTIMISE = -COPTIMISE = -O3 - -FLAGS = $(WARN) -std=gnu99 - - - -.PHONY: default -default: command shell info - -.PHONY: all -all: command shell doc - - -.PHONY: command -command: bin/krandom - -bin/%: obj/%.o - @mkdir -p bin - $(CC) $(FLAGS) $(LDOPTIMISE) -lkeccak -largparser -o $@ $^ $(LDFLAGS) - -obj/%.o: src/%.c - @mkdir -p obj - $(CC) $(FLAGS) $(COPTIMISE) -c -o $@ $< $(CFLAGS) $(CPPFLAGS) - - -.PHONY: shell -shell: bash zsh fish - -.PHONY: bash -bash: bin/$(COMMAND).bash - -.PHONY: zsh -zsh: bin/$(COMMAND).zsh - -.PHONY: fish -fish: bin/$(COMMAND).fish - -bin/%.bash: src/completion - @mkdir -p bin - auto-auto-complete bash --output $@ --source $< command="$*" - -bin/%.zsh: src/completion - @mkdir -p bin - auto-auto-complete zsh --output $@ --source $< command="$*" - -bin/%.fish: src/completion - @mkdir -p bin - auto-auto-complete fish --output $@ --source $< command="$*" - - -.PHONY: doc -doc: info pdf dvi ps - -.PHONY: info -info: bin/krandom.info -bin/%.info: info/%.texinfo info/fdl.texinfo - @mkdir -p obj/info bin - cd obj/info ; makeinfo ../../$< - mv obj/info/$*.info bin/$*.info - -.PHONY: pdf -pdf: bin/krandom.pdf -bin/%.pdf: info/%.texinfo info/fdl.texinfo - @mkdir -p obj/pdf bin - cd obj/pdf ; yes X | texi2pdf ../../$< - mv obj/pdf/$*.pdf bin/$*.pdf - -.PHONY: dvi -dvi: bin/krandom.dvi -bin/%.dvi: info/%.texinfo info/fdl.texinfo - @mkdir -p obj/dvi bin - cd obj/dvi ; yes X | $(TEXI2DVI) ../../$< - mv obj/dvi/$*.dvi bin/$*.dvi - -.PHONY: ps -ps: bin/krandom.ps -bin/%.ps: info/%.texinfo info/fdl.texinfo - @mkdir -p obj/ps bin - cd obj/ps ; yes X | texi2pdf --ps ../../$< - mv obj/ps/$*.ps bin/$*.ps - - - -.PHONY: install -install: install-base install-shell install-info - -.PHONY: install-all -install-all: install-base install-shell install-doc - -.PHONY: install-base -install-base: install-command install-copyright - - -.PHONY: install-command -install-command: bin/krandom - install -dm755 -- "$(DESTDIR)$(BINDIR)" - install -m755 -- $< "$(DESTDIR)$(BINDIR)/$(COMMAND)" - - -.PHONY: install-copyright -install-copyright: install-copying install-license - -.PHONY: install-copying -install-copying: - install -dm755 -- "$(DESTDIR)$(LICENSEDIR)/$(PKGNAME)" - install -m644 -- COPYING "$(DESTDIR)$(LICENSEDIR)/$(PKGNAME)/COPYING" - -.PHONY: install-license -install-license: - install -dm755 -- "$(DESTDIR)$(LICENSEDIR)/$(PKGNAME)" - install -m644 -- LICENSE "$(DESTDIR)$(LICENSEDIR)/$(PKGNAME)/LICENSE" - - -.PHONY: install-shell -install-shell: install-bash install-fish install-zsh - -.PHONY: install-bash -install-bash: bin/$(COMMAND).bash - install -dm755 -- "$(DESTDIR)$(DATADIR)/bash-completion/completions" - install -m644 -- $< "$(DESTDIR)$(DATADIR)/bash-completion/completions/$(COMMAND)" - -.PHONY: install-fish -install-fish: bin/$(COMMAND).fish - install -dm755 -- "$(DESTDIR)$(DATADIR)/fish/completions" - install -m644 -- $< "$(DESTDIR)$(DATADIR)/fish/completions/$(COMMAND).fish" - -.PHONY: install-zsh -install-zsh: bin/$(COMMAND).zsh - install -dm755 -- "$(DESTDIR)$(DATADIR)/zsh/site-functions" - install -m644 -- $< "$(DESTDIR)$(DATADIR)/zsh/site-functions/_$(COMMAND)" - - -.PHONY: install-doc -install-doc: install-info install-pdf install-dvi install-ps - -.PHONY: install-info -install-info: bin/krandom.info - install -dm755 -- "$(DESTDIR)$(INFODIR)" - install -m644 -- $< "$(DESTDIR)$(INFODIR)/$(PKGNAME).info" - -.PHONY: install-pdf -install-pdf: bin/krandom.pdf - install -dm755 -- "$(DESTDIR)$(DOCDIR)" - install -m644 -- $< "$(DESTDIR)$(DOCDIR)/$(PKGNAME).pdf" - -.PHONY: install-dvi -install-dvi: bin/krandom.dvi - install -dm755 -- "$(DESTDIR)$(DOCDIR)" - install -m644 -- $< "$(DESTDIR)$(DOCDIR)/$(PKGNAME).dvi" - -.PHONY: install-ps -install-ps: bin/krandom.ps - install -dm755 -- "$(DESTDIR)$(DOCDIR)" - install -m644 -- $< "$(DESTDIR)$(DOCDIR)/$(PKGNAME).ps" - - - -.PHONY: uninstall uninstall: - -rm -- "$(DESTDIR)$(BINDIR)/$(COMMAND)" - -rm -- "$(DESTDIR)$(LICENSEDIR)/$(PKGNAME)/COPYING" - -rm -- "$(DESTDIR)$(LICENSEDIR)/$(PKGNAME)/LICENSE" - -rmdir -- "$(DESTDIR)$(LICENSEDIR)/$(PKGNAME)" - -rm -- "$(DESTDIR)$(DATADIR)/bash-completion/completions/$(COMMAND)" - -rm -- "$(DESTDIR)$(DATADIR)/fish/completions/$(COMMAND).fish" - -rm -- "$(DESTDIR)$(DATADIR)/zsh/site-functions/_$(COMMAND)" - -rm -- "$(DESTDIR)$(INFODIR)/$(PKGNAME).info" - -rm -- "$(DESTDIR)$(DOCDIR)/$(PKGNAME).pdf" - -rm -- "$(DESTDIR)$(DOCDIR)/$(PKGNAME).dvi" - -rm -- "$(DESTDIR)$(DOCDIR)/$(PKGNAME).ps" - - + -rm -f -- "$(DESTDIR)$(PREFIX)/bin/krandom" -.PHONY: clean clean: - -rm -r bin obj + -rm -r -- krandom *.o +.PHONY: all install uninstall clean @@ -0,0 +1,45 @@ +/* + * Copy me if you can. + * by 20h + */ + +#ifndef ARG_H__ +#define ARG_H__ + +extern char *argv0; + +/* use main(int argc, char *argv[]) */ +#define ARGBEGIN for (argv0 = *argv, argv++, argc--;\ + argv[0] && argv[0][0] && argv[0][1];\ + argc--, argv++) {\ + char argc_;\ + char **argv_;\ + int brk_;\ + if (argv[0][0] == '-') {\ + if (argv[0][1] == '-' && argv[0][2] == '\0') {\ + argv++;\ + argc--;\ + break;\ + }\ + for (brk_ = 0, argv[0]++, argv_ = argv;\ + argv[0][0] && !brk_;\ + argv[0]++) {\ + if (argv_ != argv)\ + break;\ + argc_ = argv[0][0];\ + switch (argc_) + +#define ARGEND }\ + } else {\ + break;\ + }\ + } + +#define EARGF(x) ((argv[0][1] == '\0' && argv[1] == NULL)?\ + ((x), abort(), (char *)0) :\ + (brk_ = 1, (argv[0][1] != '\0')?\ + (&argv[0][1]) :\ + (argc--, argv++, argv[0]))) + + +#endif diff --git a/config.mk b/config.mk new file mode 100644 index 0000000..5059663 --- /dev/null +++ b/config.mk @@ -0,0 +1,10 @@ +PREFIX = /usr +MANPREFIX = $(PREFIX)/share/man + +CPPFLAGS = -D_DEFAULT_SOURCE -D_BSD_SOURCE -D_XOPEN_SOURCE=700 +CFLAGS = -std=c99 -Wall -O3 +LDFLAGS = -s -lkeccak + +# krandom is seeded by /dev/urandom (Linux's non-blocking random number generator), +# this can be changed by addeding -DURANDOM=??? to CPPFLAGS, where ??? is the file +# to use instead of /dev/urandom. diff --git a/krandom.c b/krandom.c new file mode 100644 index 0000000..31804d2 --- /dev/null +++ b/krandom.c @@ -0,0 +1,191 @@ +/* See LICENSE file for copyright and license details. */ +#include <sys/stat.h> +#include <ctype.h> +#include <errno.h> +#include <fcntl.h> +#include <stddef.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <unistd.h> + +#include <libkeccak.h> + +#include "arg.h" + + +#ifndef URANDOM +# define URANDOM "/dev/urandom" +#endif + + +char *argv0; + + +static void +usage(void) +{ + fprintf(stderr, "usage: %s [-C capacity] [-N output-size] [-R rate] [-S state-size] [-W word-size] [-v]\n", argv0); + exit(1); +} + + +static int +make_spec(struct libkeccak_generalised_spec *restrict gspec, struct libkeccak_spec *restrict spec) +{ + int r; + +#define TEST(CASE, STR) case LIBKECCAK_GENERALISED_SPEC_ERROR_##CASE: return fprintf(stderr, "%s: %s\n", argv0, STR), 1; + if (r = libkeccak_degeneralise_spec(gspec, spec), r) { + switch (r) { + TEST (STATE_NONPOSITIVE, "the state size must be positive"); + TEST (STATE_TOO_LARGE, "the state size is too large, may not exceed 1600"); + TEST (STATE_MOD_25, "the state size must be a multiple of 25"); + TEST (WORD_NONPOSITIVE, "the word size must be positive"); + TEST (WORD_TOO_LARGE, "the word size is too large, may not exceed 64"); + TEST (STATE_WORD_INCOHERENCY, "the state size must be exactly 25 times the word size"); + TEST (CAPACITY_NONPOSITIVE, "the capacity must be positive"); + TEST (CAPACITY_MOD_8, "the capacity must be a multiple of 8"); + TEST (BITRATE_NONPOSITIVE, "the rate must be positive"); + TEST (BITRATE_MOD_8, "the rate must be a multiple of 8"); + TEST (OUTPUT_NONPOSITIVE, "the output size must be positive"); + default: + fprintf(stderr, "%s: unknown error in algorithm parameters\n", argv0); + return 1; + } + } +#undef TEST + +#define TEST(CASE, STR) case LIBKECCAK_SPEC_ERROR_##CASE: return fprintf(stderr, "%s: %s\n", argv0, STR), 1; + if (r = libkeccak_spec_check(spec), r) { + switch (r) { + TEST (BITRATE_NONPOSITIVE, "the rate size must be positive"); + TEST (BITRATE_MOD_8, "the rate must be a multiple of 8"); + TEST (CAPACITY_NONPOSITIVE, "the capacity must be positive"); + TEST (CAPACITY_MOD_8, "the capacity must be a multiple of 8"); + TEST (OUTPUT_NONPOSITIVE, "the output size must be positive"); + TEST (STATE_TOO_LARGE, "the state size is too large, may not exceed 1600"); + TEST (STATE_MOD_25, "the state size must be a multiple of 25"); + TEST (WORD_NON_2_POTENT, "the word size must be a power of 2"); + TEST (WORD_MOD_8, "the word size must be a multiple of 8"); + default: + fprintf(stderr, "%s: unknown error in algorithm parameters\n", argv0); + return 1; + } + } +#undef TEST + + return 0; +} + + +int +main(int argc, char *argv[]) +{ + char *restrict generated_random = NULL; + struct libkeccak_generalised_spec gspec; + struct libkeccak_spec spec; + struct libkeccak_state state; + size_t length, ptr; + ssize_t got; + int r, fd = -1, verbose = 0; + long int *param; + char *arg; + + memset(&state, 0, sizeof(struct libkeccak_state)); + libkeccak_generalised_spec_initialise(&gspec); + + errno = 0; + ARGBEGIN { + case 'R': + param = &gspec.bitrate; + goto set_param; + case 'C': + param = &gspec.capacity; + goto set_param; + case 'N': + case 'O': + param = &gspec.output; + goto set_param; + case 'S': + case 'B': + param = &gspec.state_size; + goto set_param; + case 'W': + param = &gspec.word_size; + set_param: + arg = EARGF(usage()); + if (!isdigit(*arg)) + usage(); + *param = strtol(arg, &arg, 10); + if (errno || *arg) + usage(); + break; + case 'v': + verbose = 1; + break; + default: + usage(); + } ARGEND; + + if (argc) + usage(); + + if ((r = make_spec(&gspec, &spec))) + goto done; + + if (verbose) { + fprintf(stderr, "%s: " "rate: %li\n", argv0, gspec.bitrate); + fprintf(stderr, "%s: " "capacity: %li\n", argv0, gspec.capacity); + fprintf(stderr, "%s: " "output size: %li\n", argv0, gspec.output); + fprintf(stderr, "%s: " "state size: %li\n", argv0, gspec.state_size); + fprintf(stderr, "%s: " "word size: %li\n", argv0, gspec.word_size); + } + + libkeccak_state_initialise(&state, &spec); + + fd = open(URANDOM, O_RDONLY); + if (fd < 0) + goto fail; + for (ptr = 0, length = sizeof(state.S); ptr < length;) { + got = read(fd, (char*)(state.S) + ptr, length - ptr); + if (got <= 0) { + if (!got) { + fprintf(stderr, "%s: %s contained less than %zu bytes\n", argv0, URANDOM, length); + r = 2; + goto done; + } + goto fail; + } + ptr += (size_t)got; + } + close(fd); + fd = -1; + + length = (size_t)((spec.output + 7) / 8); + generated_random = malloc(length); + if (!generated_random) + goto fail; + + for (;;) { + libkeccak_squeeze(&state, generated_random); + got = write(STDOUT_FILENO, generated_random, length); + if (got < 0) { + if (errno == EPIPE) + break; + goto fail; + } + } + +done: + if (fd >= 0) + close(fd); + free(generated_random); + libkeccak_state_fast_destroy(&state); + return r; + +fail: + perror(argv0); + r = 2; + goto done; +} diff --git a/src/completion b/src/completion deleted file mode 100644 index 8af4b9d..0000000 --- a/src/completion +++ /dev/null @@ -1,33 +0,0 @@ -; krandom – Keccak-based userspace pseudorandom number generator -; Copyright © 2014 Mattias Andrée (maandree@member.fsf.org) -; -; This program is free software: you can redistribute it and/or modify -; it under the terms of the GNU Affero General Public License as published by -; the Free Software Foundation, either version 3 of the License, or -; (at your option) any later version. -; -; This program 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 Affero General Public License for more details. -; -; You should have received a copy of the GNU Affero General Public License -; along with this program. If not, see <http://www.gnu.org/licenses/>. - - -((value command) - - (multiple unargumented - ((options -h --help) (complete --help) (desc 'Display option summary')) - ((options -v --verbose) (complete --verbose) (desc 'Be verbose')) - ) - - (multiple argumented - ((options -R --bitrate --rate) (complete --rate) (arg RATE) (files -0) (desc 'Select rate')) - ((options -C --capacity) (complete --capacity) (arg CAPACITY) (files -0) (desc 'Select capacity')) - ((options -N -O --output-size --output) (complete --output-size) (arg SIZE) (files -0) (desc 'Select output size')) - ((options -S -B --state-size --state) (complete --state-size) (arg SIZE) (files -0) (desc 'Select state size')) - ((options -W --word-size --word) (complete --word-size) (arg SIZE) (files -0) (desc 'Select word size')) - ) -) - diff --git a/src/krandom.c b/src/krandom.c deleted file mode 100644 index 54eca43..0000000 --- a/src/krandom.c +++ /dev/null @@ -1,218 +0,0 @@ -/** - * krandom – Keccak-based userspace pseudorandom number generator - * Copyright © 2014 Mattias Andrée (maandree@member.fsf.org) - * - * This program is free software: you can redistribute it and/or modify - * it under the terms of the GNU Affero General Public License as published by - * the Free Software Foundation, either version 3 of the License, or - * (at your option) any later version. - * - * This program 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 Affero General Public License for more details. - * - * You should have received a copy of the GNU Affero General Public License - * along with this program. If not, see <http://www.gnu.org/licenses/>. - */ -#include <stdio.h> -#include <errno.h> -#include <fcntl.h> -#include <unistd.h> -#include <stddef.h> -#include <stdlib.h> -#include <string.h> -#include <sys/stat.h> -#include <alloca.h> - -#include <libkeccak.h> -#include <argparser.h> - - - -#ifndef URANDOM -# ifndef DEVDIR -# define DEVDIR "/dev" -# endif -# define URANDOM DEVDIR "/urandom" -#endif - - - -#define USER_ERROR(string) \ - (fprintf(stderr, "%s: %s.\n", execname, string), 1) - -#define ADD(arg, desc, ...) \ - (arg ? args_add_option(args_new_argumented(NULL, arg, 0, __VA_ARGS__, NULL), desc) \ - : args_add_option(args_new_argumentless(NULL, 0, __VA_ARGS__, NULL), desc)) - -#define LAST(arg) \ - (args_opts_get(arg)[args_opts_get_count(arg) - 1]) - - - -/** - * `argv[0]` from `main` - */ -static char* execname; - - -/** - * Convert `libkeccak_generalised_spec_t` to `libkeccak_spec_t` and check for errors - * - * @param gspec See `libkeccak_degeneralise_spec` - * @param spec See `libkeccak_degeneralise_spec` - * @return Zero on success, an appropriate exit value on error - */ -static int make_spec(libkeccak_generalised_spec_t* restrict gspec, libkeccak_spec_t* restrict spec) -{ - int r; - -#define TEST(CASE, STR) case LIBKECCAK_GENERALISED_SPEC_ERROR_##CASE: return USER_ERROR(STR) - if (r = libkeccak_degeneralise_spec(gspec, spec), r) - switch (r) - { - TEST (STATE_NONPOSITIVE, "the state size must be positive"); - TEST (STATE_TOO_LARGE, "the state size is too large, may not exceed 1600"); - TEST (STATE_MOD_25, "the state size must be a multiple of 25"); - TEST (WORD_NONPOSITIVE, "the word size must be positive"); - TEST (WORD_TOO_LARGE, "the word size is too large, may not exceed 64"); - TEST (STATE_WORD_INCOHERENCY, "the state size must be exactly 25 times the word size"); - TEST (CAPACITY_NONPOSITIVE, "the capacity must be positive"); - TEST (CAPACITY_MOD_8, "the capacity must be a multiple of 8"); - TEST (BITRATE_NONPOSITIVE, "the rate must be positive"); - TEST (BITRATE_MOD_8, "the rate must be a multiple of 8"); - TEST (OUTPUT_NONPOSITIVE, "the output size must be positive"); - default: - return USER_ERROR("unknown error in algorithm parameters"); - } -#undef TEST - -#define TEST(CASE, STR) case LIBKECCAK_SPEC_ERROR_##CASE: return USER_ERROR(STR) - if (r = libkeccak_spec_check(spec), r) - switch (r) - { - TEST (BITRATE_NONPOSITIVE, "the rate size must be positive"); - TEST (BITRATE_MOD_8, "the rate must be a multiple of 8"); - TEST (CAPACITY_NONPOSITIVE, "the capacity must be positive"); - TEST (CAPACITY_MOD_8, "the capacity must be a multiple of 8"); - TEST (OUTPUT_NONPOSITIVE, "the output size must be positive"); - TEST (STATE_TOO_LARGE, "the state size is too large, may not exceed 1600"); - TEST (STATE_MOD_25, "the state size must be a multiple of 25"); - TEST (WORD_NON_2_POTENT, "the word size must be a power of 2"); - TEST (WORD_MOD_8, "the word size must be a multiple of 8"); - default: - return USER_ERROR("unknown error in algorithm parameters"); - } -#undef TEST - - return 0; -} - - - -/** - * Mane! - * - * @param argc The number of elements in `argv` - * @param argv Command line arguments - * @return Zero on and only on success - */ -int main(int argc, char** argv) -{ - char* restrict generated_random = NULL; - libkeccak_generalised_spec_t gspec; - libkeccak_spec_t spec; - libkeccak_state_t state; - size_t length, ptr; - ssize_t got; - int r, fd = -1, verbose = 0; - - execname = argc ? *argv : "krandom"; - - - memset(&state, 0, sizeof(libkeccak_state_t)); - libkeccak_generalised_spec_initialise(&gspec); - if (!argc) - goto skip_argv_parsing; - - args_init("Keccak-based userspace pseudorandom number generator", - "krandom [options...]", NULL, - NULL, 1, 0, args_standard_abbreviations); - - ADD(NULL, "Display option summary", "-h", "--help"); - ADD("RATE", "Select rate", "-R", "--bitrate", "--rate"); - ADD("CAPACITY", "Select capacity", "-C", "--capacity"); - ADD("SIZE", "Select output size", "-N", "-O", "--output-size", "--output"); - ADD("SIZE", "Select state size", "-S", "-B", "--state-size", "--state"); - ADD("SIZE", "Select word size", "-W", "--word-size", "--word"); - ADD(NULL, "Be verbose", "-v", "--verbose"); - - args_parse(argc, argv); - - if (args_opts_used("-h")) return args_help(0), args_dispose(), 0; - if (args_opts_used("-R")) gspec.bitrate = atol(LAST("-R")); - if (args_opts_used("-C")) gspec.capacity = atol(LAST("-C")); - if (args_opts_used("-N")) gspec.output = atol(LAST("-N")); - if (args_opts_used("-S")) gspec.state_size = atol(LAST("-S")); - if (args_opts_used("-W")) gspec.word_size = atol(LAST("-W")); - if (args_opts_used("-v")) verbose = 1; - - skip_argv_parsing: - if ((r = make_spec(&gspec, &spec))) - goto done; - - if (verbose) - { - fprintf(stderr, "%s: " "rate: %li\n", execname, gspec.bitrate); - fprintf(stderr, "%s: " "capacity: %li\n", execname, gspec.capacity); - fprintf(stderr, "%s: " "output size: %li\n", execname, gspec.output); - fprintf(stderr, "%s: " "state size: %li\n", execname, gspec.state_size); - fprintf(stderr, "%s: " "word size: %li\n", execname, gspec.word_size); - } - - libkeccak_state_initialise(&state, &spec); - - fd = open(URANDOM, O_RDONLY); - if (fd < 0) - goto fail; - for (ptr = 0, length = sizeof(state.S); ptr < length;) - { - got = read(fd, (char*)(state.S) + ptr, length - ptr); - if (got <= 0) - goto fail; - ptr += (size_t)got; - } - close(fd), fd = -1; - - length = (size_t)((spec.output + 7) / 8); - generated_random = malloc(length); - if (generated_random == NULL) - goto fail; - - for (;;) - { - libkeccak_squeeze(&state, generated_random); - got = write(STDOUT_FILENO, generated_random, length); - if (got >= 0) - continue; - if (errno == EPIPE) - break; - goto fail; - } - - - done: - if (fd >= 0) - close(fd); - if (argc) - args_dispose(); - free(generated_random); - libkeccak_state_fast_destroy(&state); - return r; - fail: - perror(execname); - r = 2; - goto done; -} - |