fics_getsalt() -- initial revision

1 files changed, 46 insertions, 0 deletions

diff --git a/FICS/fics_getsalt.cpp b/FICS/fics_getsalt.cpp
new file mode 100644
index 0000000..95705b0
--- /dev/null
+++ b/FICS/fics_getsalt.cpp
@@ -0,0 +1,46 @@
+/*
+ * Written by Markus Uhlin <maxxe@rpblc.net>,
+ * 25 Dec 2023.
+ */
+
+#include <cstdio>
+#include <cstring>
+#include <random>
+
+#include "fics_getsalt.h"
+
+char *
+fics_getsalt(void)
+{
+	static bool init_done = false;
+	static const char legal_index[] =
+	    "./0123456789"
+	    "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
+	    "abcdefghijklmnopqrstuvwxyz";
+	static char salt[FICS_SALT_SIZE];
+
+	if (!init_done) {
+		strcpy(salt, FICS_SALT_BEG);
+		init_done = true;
+	}
+
+	std::random_device rd;
+	std::mt19937 gen(rd());
+	std::uniform_int_distribution<size_t> dist(0, strlen(legal_index) - 1);
+
+	for (size_t i = 7; i < sizeof salt; i++)
+		salt[i] = legal_index[dist(gen)];
+	salt[sizeof salt - 1] = '\0';
+	return (&salt[0]);
+}
+
+#if SELF_TEST
+int
+main(void)
+{
+	puts(fics_getsalt());
+	puts(fics_getsalt());
+	puts(fics_getsalt());
+	return 0;
+}
+#endif