hash functions: add tests to verify output against test vectors

A bug was discovered in the sha256 hash functions provided by this
library but the mistake was not caught for a long time because no tests
were run using known test vectors.

The test vectors used in this commit are from publicly available and
well-respected sources (NIST and the original author of ripe-md).

You can run the tests with "make check".

Signed-off-by: Aleksa Sarai <[email protected]>

Makefile.am

@@ -20,6 +20,13 @@ libnbcompat_la_SOURCES=
 libnbcompat_la_LIBADD=			$(LTLIBOBJS)
 EXTRA_libnbcompat_la_DEPENDENCIES:	$(LTLIBOBJS)
 
+# Test programs.
+TESTS = rmd160-test sha1-test sha2-test
+check_PROGRAMS = rmd160-test sha1-test sha2-test
+rmd160_test_LDADD = .libs/libnbcompat.a
+sha1_test_LDADD   = .libs/libnbcompat.a
+sha2_test_LDADD   = .libs/libnbcompat.a
+
 # It's bad form to install your "config.h", so we tweak it to make it less harmful
 install-data-hook:
 	find $(DESTDIR)$(includedir)/nbcompat.h $(DESTDIR)$(includedir)/nbcompat -name '*.h' -print | while read HDRFILE; do \
@@ -74,8 +81,11 @@ noinst_HEADERS=			private/cclass.h \
 				private/cname.h \
 				private/pwcache.h \
 				private/regex2.h \
+				private/test-helpers.h \
 				private/utils.h
 
+noinst_SOURCES = private/cavs2c.awk
+
 if WITH_DB
 
 libnbcompat_la_SOURCES+=	db/btree/bt_close.c \

rmd160-test.c

@@ -0,0 +1,69 @@
+/* $NetBSD: rmd160-test.c,v 1.0 2023/06/06 16:12:53 cyphar Exp $ */
+
+/*-
+ * Copyright (c) 2023 Aleksa Sarai <[email protected]>.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE
+ * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
+ * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <nbcompat.h>
+#include <nbcompat/stdio.h>
+#include <nbcompat/rmd160.h>
+
+#include "private/test-helpers.h"
+
+DEFINE_TEST_FUNC(ripemd160, RMD160Data)
+
+#define VECTOR8_PART "1234567890"
+#define VECTOR8	\
+	VECTOR8_PART VECTOR8_PART VECTOR8_PART VECTOR8_PART \
+	VECTOR8_PART VECTOR8_PART VECTOR8_PART VECTOR8_PART
+
+char *vector9(void)
+{
+	char *vector = malloc(1000 * 1000 + 1);
+	memset(vector, 'a', 1000*1000);
+	vector[1000*1000] = '\0';
+	return vector;
+}
+
+int main(void)
+{
+	int err = 0;
+
+	/* Test vectors from <https://homes.esat.kuleuven.be/~bosselae/ripemd160.html>. */
+	err |= test_ripemd160_str("", "9c1185a5c5e9fc54612808977ee8f548b2258d31");
+	err |= test_ripemd160_str("a", "0bdc9d2d256b3ee9daae347be6f4dc835a467ffe");
+	err |= test_ripemd160_str("abc", "8eb208f7e05d987a9b044a8e98c6b087f15a0bfc");
+	err |= test_ripemd160_str("message digest", "5d0689ef49d2fae572b881b123a85ffa21595f36");
+	err |= test_ripemd160_str("abcdefghijklmnopqrstuvwxyz", "f71c27109c692c1b56bbdceb5b9d2865b3708dbc");
+	err |= test_ripemd160_str("abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq", "12a053384a9c0c88e405a06c27dcf49ada62eb2b");
+	err |= test_ripemd160_str("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789", "b0e20b6e3116640286ed3a87a5713079b21f5189");
+	err |= test_ripemd160_str(VECTOR8, "9b752e45573d4b39f4dbd3323cab82bf63326bfb");
+	err |= test_ripemd160_str(vector9(), "52783243c1697bdbe16d37f97f68f08325dc1528");
+
+	return err;
+}