include: Revise printing hashes

The code was a bit convoluted to print hashes as hex strings. Renamed
to HASH_FMT32 and HASH_VAL32 to make clear we are printing the first
32 bits only, and added options to print 64 up to 512 bits as well.
This doesn't depend on endianness anymore. Adds a small test for the
hash (printing) functions.

Signed-off-by: Dimitri Staessens <dimitri@ouroboros.rocks>
Signed-off-by: Sander Vrijders <sander@ouroboros.rocks>

1 files changed, 182 insertions, 0 deletions

diff --git a/src/lib/tests/hash_test.c b/src/lib/tests/hash_test.c
new file mode 100644
index 00000000..7dc0701a
--- /dev/null
+++ b/src/lib/tests/hash_test.c
@@ -0,0 +1,182 @@
+/*
+ * Ouroboros - Copyright (C) 2016 - 2023
+ *
+ * Test of the hashing functions
+ *
+ *    Dimitri Staessens <dimitri@ouroboros.rocks>
+ *    Sander Vrijders   <sander@ouroboros.rocks>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., http://www.fsf.org/about/contact/.
+ */
+
+#include <ouroboros/hash.h>
+
+#include <stdlib.h>
+#include <stdint.h>
+#include <assert.h>
+#include <string.h>
+#include <stdio.h>
+
+/*
+ * Test vectors calculated at
+ * https://www.lammertbies.nl/comm/info/crc-calculation.html
+ */
+
+struct vec_entry {
+        char * in;
+        char * out;
+};
+
+static int test_crc32(void)
+{
+        struct vec_entry vec [] = {
+                { "0",         "f4dbdf21" },
+                { "123456789", "cbf43926" },
+                { "987654321", "015f0201" },
+                { NULL,        NULL       }
+        };
+
+        struct vec_entry * cur = vec;
+
+        while (cur->in != NULL) {
+                uint8_t crc[4];
+                char    res[9];
+
+                str_hash(HASH_CRC32, crc, cur->in);
+
+                sprintf(res, HASH_FMT32, HASH_VAL32(crc));
+                if (strcmp(res, cur->out) != 0) {
+                        printf("Hash failed %s != %s", res, cur->out);
+                        return -1;
+                }
+
+                ++cur;
+        }
+
+        return 0;
+}
+
+static int test_md5(void)
+{
+        struct vec_entry vec [] = {{
+                "abc",
+                "900150983cd24fb0d6963f7d28e17f72"
+        }, {
+                "The quick brown fox jumps over the lazy dog",
+                "9e107d9d372bb6826bd81d3542a419d6"
+        }, {
+                "abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq",
+                "8215ef0796a20bcaaae116d3876c664a"
+        }, {
+                NULL,
+                NULL
+        }};
+
+        struct vec_entry * cur = vec;
+
+        while (cur->in != NULL) {
+                uint8_t md5[16];
+                char    res[33];
+
+                str_hash(HASH_MD5, md5, cur->in);
+
+                sprintf(res, HASH_FMT128, HASH_VAL128(md5));
+                if (strcmp(res, cur->out) != 0) {
+                        printf("Hash failed %s != %s", res, cur->out);
+                        return -1;
+                }
+
+                ++cur;
+        }
+
+        return 0;
+}
+
+static int test_sha3(void)
+{
+        uint8_t sha3[64];
+        char    res[129];
+
+        char * in = "abc";
+
+        char * out =
+                "e642824c3f8cf24ad09234ee7d3c766f"
+                "c9a3a5168d0c94ad73b46fdf";
+
+        str_hash(HASH_SHA3_224, sha3, in);
+
+        sprintf(res, HASH_FMT224, HASH_VAL224(sha3));
+        if (strcmp(res, out) != 0) {
+                printf("SHA3-224 failed %s != %s", res, out);
+                return -1;
+        }
+
+        out =
+                "3a985da74fe225b2045c172d6bd390bd"
+                "855f086e3e9d525b46bfe24511431532";
+
+        str_hash(HASH_SHA3_256, sha3, in);
+
+        sprintf(res, HASH_FMT256, HASH_VAL256(sha3));
+        if (strcmp(res, out) != 0) {
+                printf("SHA3-256 failed %s != %s", res, out);
+                return -1;
+        }
+
+        out =
+                "ec01498288516fc926459f58e2c6ad8d"
+                "f9b473cb0fc08c2596da7cf0e49be4b2"
+                "98d88cea927ac7f539f1edf228376d25";
+
+        str_hash(HASH_SHA3_384, sha3, in);
+
+        sprintf(res, HASH_FMT384, HASH_VAL384(sha3));
+        if (strcmp(res, out) != 0) {
+                printf("SHA3-384failed %s != %s", res, out);
+                return -1;
+        }
+
+        out =
+                "b751850b1a57168a5693cd924b6b096e"
+                "08f621827444f70d884f5d0240d2712e"
+                "10e116e9192af3c91a7ec57647e39340"
+                "57340b4cf408d5a56592f8274eec53f0";
+
+        str_hash(HASH_SHA3_512, sha3, in);
+
+        sprintf(res, HASH_FMT512, HASH_VAL512(sha3));
+        if (strcmp(res, out) != 0) {
+                printf("SHA3-512 failed %s != %s", res, out);
+                return -1;
+        }
+
+        return 0;
+}
+
+int hash_test(int     argc,
+              char ** argv)
+{
+        int     ret = 0;
+
+        (void) argc;
+        (void) argv;
+
+        ret |= test_crc32();
+
+        ret |= test_md5();
+
+        ret |= test_sha3();
+
+        return ret;
+}
\ No newline at end of file