cryptutils

fnv1a64: Add fnv1a64 utility

Diffstat

2 files changed, 119 insertions, 5 deletions

diff --git a/CMakeLists.txt b/CMakeLists.txt
index a6ba700..6de026e 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,8 +1,5 @@
-# CMakeLists.txt
-# CMakeLists file for OMKOV cryptutils
-
 CMAKE_MINIMUM_REQUIRED(VERSION 3.12)
-PROJECT(cryptutils C)
+PROJECT(cryptutils LANGUAGES C)
 
 SET(CMAKE_ARCHIVE_OUTPUT_DIRECTORY ${PROJECT_SOURCE_DIR}/lib)
 SET(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${PROJECT_SOURCE_DIR}/bin)
@@ -10,14 +7,15 @@ SET(CMAKE_STATIC_LIBRARY_PREFIX "")
 
 FIND_PACKAGE(OpenSSL REQUIRED)
 
-FILE(GLOB LIBSRC ${PROJECT_SOURCE_DIR}/src/lib/*)
+FILE(GLOB LIB ${PROJECT_SOURCE_DIR}/src/lib/*)
 
-ADD_LIBRARY(lib STATIC ${LIBSRC})
+ADD_LIBRARY(lib STATIC ${LIB})
 
 LINK_LIBRARIES(lib)
 
 ADD_EXECUTABLE(alder32 ${PROJECT_SOURCE_DIR}/src/alder32.c)
 ADD_EXECUTABLE(crc32   ${PROJECT_SOURCE_DIR}/src/crc32.c)
+ADD_EXECUTABLE(fnv1a64 ${PROJECT_SOURCE_DIR}/src/fnv1a64.c)
 ADD_EXECUTABLE(otp     ${PROJECT_SOURCE_DIR}/src/otp.c)
 
 TARGET_LINK_LIBRARIES(otp OpenSSL::Crypto)
diff --git a/src/fnv1a64.c b/src/fnv1a64.c
new file mode 100644
index 0000000..5ae0845
--- /dev/null
+++ b/src/fnv1a64.c
@@ -0,0 +1,115 @@
+// fnv1a64.c, version 1.0.0
+// OMKOV cryptutils fnv1a64
+// Copyright (C) 2021, Jakob Wakeling
+// All rights reserved.
+
+/*
+OMKOV Permissive Licence, version 1.0
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of
+this software and associated documentation files (the "Software"), to deal with
+the Software without restriction, including without limitation the rights to
+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+the Software, and to permit persons to whom the Software is furnished to do so,
+subject to the following conditions:
+
+* Redistributions of source code must retain the above copyright notice, this
+  list of conditions and the following disclaimers.
+* Redistributions in binary form must reproduce the above copyright notice, this
+  list of conditions and the following disclaimers in the documentation and/or
+  other materials provided with the distribution.
+* Neither the names of the copyright holders, nor the names of its contributors
+  may be used to endorse or promote products derived from this Software without
+  specific prior written permission.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE COPYRIGHT
+HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS WITH THE SOFTWARE.
+*/
+
+#include "lib/error.c"
+#include "lib/optget.h"
+
+#include <stdbool.h>
+#include <stdint.h>
+#include <stdio.h>
+
+#define VERSION "1.0.0"
+
+static struct lop lops[] = {
+	{ "help",    ARG_NUL, 256 },
+	{ "version", ARG_NUL, 257 },
+	{ "bsd",     ARG_NUL, 258 },
+	{ NULL, 0, 0 }
+};
+
+static bool qflag;
+static int form;
+
+static inline void fnv1a64(const char *file);
+
+static void hlp(void);
+static void ver(void);
+
+int main(int ac, char *av[]) { A0 = av[0];
+	struct opt opt = OPTGET_INIT; opt.str = "q"; opt.lops = lops;
+	for (int o; (o = optget(&opt, av, 1)) != -1;) switch (o) {
+	case 'q': { qflag = true; break; }
+	case 256: { hlp(); return 0; }
+	case 257: { ver(); return 0; }
+	case 258: { form = 1; break; }
+	default: { return 1; }
+	}
+	
+	if (opt.ind == ac) { fnv1a64(NULL); }
+	else for (char **p = &av[opt.ind]; *p; ++p) { fnv1a64(*p); }
+	
+	return warned;
+}
+
+static inline void fnv1a64(const char *file) {
+	uint8_t buf[BUFSIZ * 16]; FILE *fi;
+	register uint64_t h = 0xCBF29CE484222325;
+	
+	if (!file) { fi = stdin; } else { fi = fopen(file, "rb"); }
+	if (!fi) { warn("%s: %s", file, serr()); return; }
+	
+	for (size_t c; (c = fread(buf, 1, sizeof (buf), fi));) {
+		for (register size_t i = 0; i != c; ++i) {
+			h ^= buf[i]; h *= 0x00000100000001B3;
+		}
+	}
+	
+	if (ferror(fi)) { fclose(fi); warn("%s: %s", file, serr()); return; }
+	
+	if (!file || qflag) { printf("%016lX\n", h); } else switch (form) {
+	case 0: { printf("%016lX *%s\n", h, file); break; }
+	case 1: { printf("FNV1A64 (%s) = %016lX\n", file, h); break; }
+	}
+	
+	if (fi != stdin) { fclose(fi); } return;
+}
+
+/* Print help information */
+static void hlp(void) {
+	puts("fnv1a64 - Compute the FNV1a-64 for a file\n");
+	puts("usage: fnv1a64 [-q] [--bsd] [file...]\n");
+	puts("options:");
+	puts("  -q         Output only the hash value");
+	puts("  --bsd      Use BSD style hashes");
+	puts("  --help     Display help information");
+	puts("  --version  Display version information");
+	return;
+}
+
+/* Print version information */
+static void ver(void) {
+	puts("OMKOV cryptutils fnv1a64, version " VERSION);
+	puts("Copyright (C) 2021, Jakob Wakeling");
+	puts("All rights reserved.");
+	puts("OMKOV Permissive Licence (https://www.omkov.net/OLPE)");
+	return;
+}