Update: Added tests for MD5 handling code

src/tests/Makefile.am

@@ -33,5 +33,11 @@ ctest_string_renderer_test_LDADD = \
     icecast-string_renderer.o
 check_PROGRAMS += ctest_string_renderer.test
 
+ctest_crypt_test_SOURCES = tests/ctest_crypt.c
+ctest_crypt_test_LDADD = \
+    icecast-util_string.o \
+    icecast-md5.o
+check_PROGRAMS += ctest_crypt.test
+
 # Add all programs to TESTS
 TESTS = $(check_PROGRAMS)

src/tests/ctest_crypt.c

@@ -0,0 +1,78 @@
+/* Icecast
+ *
+ * This program is distributed under the GNU General Public License, version 2.
+ * A copy of this license is included with this source.
+ *
+ * Copyright 2018-2023, Philipp "ph3-der-loewe" Schafft <lion@lion.leolix.org>,
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+#include <stdbool.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <igloo/tap.h>
+
+#include "../md5.h"
+#include "../util_string.h"
+
+void test_md5_hash(const char *in, const char *expect, bool positive)
+{
+    struct MD5Context context;
+    unsigned char digest[16];
+    char *out;
+
+    MD5Init(&context);
+
+    MD5Update(&context, (const unsigned char *)in, strlen(in));
+
+    MD5Final(digest, &context);
+
+    out = util_bin_to_hex(digest, 16);
+
+    if (positive) {
+        igloo_tap_test("md5 positive vector", strcmp(out, expect) == 0);
+    } else {
+        igloo_tap_test("md5 negative vector", strcmp(out, expect) != 0);
+    }
+
+    free(out);
+}
+
+static void test_md5(void)
+{
+    struct vector {
+        const char *in;
+        const char *out;
+    };
+    static const struct vector table_pos[] = {
+        {"", "d41d8cd98f00b204e9800998ecf8427e"},
+        {"\n", "68b329da9893e34099c7d8ad5cb9c940"}
+    };
+    static const struct vector table_neg[] = {
+        {"XXX", "d41d8cd98f00b204e9800998ecf8427e"},
+        {"YYY", "1234567890abcdef1234567890abcdef"}
+    };
+    size_t i;
+
+    for (i = 0; i < (sizeof(table_pos)/sizeof(*table_pos)); i++) {
+        test_md5_hash(table_pos[i].in, table_pos[i].out, true);
+    }
+
+    for (i = 0; i < (sizeof(table_neg)/sizeof(*table_neg)); i++) {
+        test_md5_hash(table_neg[i].in, table_neg[i].out, false);
+    }
+}
+
+int main (void)
+{
+    igloo_tap_init();
+    igloo_tap_exit_on(igloo_TAP_EXIT_ON_FIN, NULL);
+    igloo_tap_group_run("md5 vectors", test_md5);
+    igloo_tap_fin();
+
+    return EXIT_FAILURE; // return failure as we should never reach this point!
+}
+