lib: Add implementation for MD5 hashes

1 files changed, 152 insertions, 0 deletions

diff --git a/src/lib/tests/md5_test.c b/src/lib/tests/md5_test.c
new file mode 100644
index 00000000..684ecb3f
--- /dev/null
+++ b/src/lib/tests/md5_test.c
@@ -0,0 +1,152 @@
+/*
+ * Ouroboros - Copyright (C) 2016 - 2017
+ *
+ * Test of the MD5 function
+ *
+ *    Dimitri Staessens <dimitri.staessens@ugent.be>
+ *    Sander Vrijders   <sander.vrijders@ugent.be>
+ *
+ * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <ouroboros/md5.h>
+
+#include <stdlib.h>
+#include <stdint.h>
+#include <assert.h>
+#include <string.h>
+#include <stdio.h>
+
+static char * hash_to_str(uint8_t * hash,
+                          size_t    len)
+{
+        size_t i;
+
+        char * HEX = "0123456789abcdef";
+        char * str;
+
+        str = malloc(len * 2 + 1);
+        if (str == NULL)
+                return NULL;
+
+        for (i = 0; i < len; ++i) {
+                str[i * 2]     = HEX[(hash[i] & 0xF0) >> 4];
+                str[i * 2 + 1] = HEX[hash[i] & 0x0F];
+        }
+
+        str[2 * i] = '\0';
+
+        return str;
+}
+
+static int check_hash(char *    check,
+                      uint8_t * hash,
+                      size_t    len)
+{
+        char * res;
+        int ret;
+
+        assert(hash);
+        assert(check);
+        assert(strlen(check));
+
+        res = hash_to_str(hash, len);
+        if (res == NULL) {
+                printf("Out of memory.\n");
+                return -1;
+        }
+
+        ret = strcmp(res, check);
+
+        printf("hash  : %s\n", res);
+        printf("check : %s\n\n", check);
+
+        free(res);
+
+        return ret;
+
+}
+
+int md5_test(int     argc,
+             char ** argv)
+{
+        struct md5_ctx ctx;
+
+        /* Storage for result. */
+        uint8_t res[MD5_HASH_LEN];
+
+        /* SHA3 test vectors */
+        char * str1_inp = "abc";
+
+        char * str1_md5 = "900150983cd24fb0d6963f7d28e17f72";
+
+        char * str2_inp = "The quick brown fox jumps over the lazy dog";
+
+        char * str2_md5 = "9e107d9d372bb6826bd81d3542a419d6";
+
+        char * str3_inp =
+                "abcdbcdecdefdefgefghfghighijhijk"
+                "ijkljklmklmnlmnomnopnopq";
+
+        char * str3_inp2 =
+                " abcdbcdecdefdefgefghfghighijhijk"
+                "ijkljklmklmnlmnomnopnopq";
+
+        char * str3_md5 = "8215ef0796a20bcaaae116d3876c664a";
+
+        (void) argc;
+        (void) argv;
+
+        /* 1st input string. */
+        printf("test: %s.\n\n", str1_inp);
+
+        rhash_md5_init(&ctx);
+        rhash_md5_update(&ctx, str1_inp, strlen(str1_inp));
+        rhash_md5_final(&ctx, res);
+
+        if (check_hash(str1_md5, res, MD5_HASH_LEN))
+                return -1;
+
+        /* 2nd input string. */
+        printf("test: <empty string>.\n\n");
+
+        rhash_md5_init(&ctx);
+        rhash_md5_update(&ctx, str2_inp, strlen(str2_inp));
+        rhash_md5_final(&ctx, res);
+
+        if (check_hash(str2_md5, res, MD5_HASH_LEN))
+                return -1;
+
+        /* 3rd input string */
+        printf("test: %s.\n\n", str3_inp);
+
+        rhash_md5_init(&ctx);
+        rhash_md5_update(&ctx, str3_inp, strlen(str3_inp));
+        rhash_md5_final(&ctx, res);
+
+        if (check_hash(str3_md5, res, MD5_HASH_LEN))
+                return -1;
+
+        /* unaligned 3rd input string. */
+        printf("test: %s.\n\n", str3_inp2 + 1);
+
+        rhash_md5_init(&ctx);
+        rhash_md5_update(&ctx, str3_inp2 + 1, strlen(str3_inp2 + 1));
+        rhash_md5_final(&ctx, res);
+
+        if (check_hash(str3_md5, res, MD5_HASH_LEN))
+                return -1;
+
+        return 0;
+}