wpa_supplicant: Port dpp feature from supplicant

Add files required for DPP feature from upstream.
These file expose the functionality to create DPP packets.
Ported crypto layer from openssl to mbedtls.

Interfacing to use these API will be added in seperate commit

components/wpa_supplicant/src/utils/common.c

@@ -9,6 +9,7 @@
 #include "utils/includes.h"
 
 #include "utils/common.h"
+#include <time.h>
 
 /**
  * inc_byte_array - Increment arbitrary length byte array by one
@@ -365,4 +366,128 @@ void wpa_bin_clear_free(void *bin, size_t len)
 	}
 }
 
+int int_array_len(const int *a)
+{
+	int i;
+	for (i = 0; a && a[i]; i++)
+		;
+	return i;
+}
 
+void bin_clear_free(void *bin, size_t len)
+{
+	if (bin) {
+		os_memset(bin, 0, len);
+		os_free(bin);
+	}
+}
+
+void str_clear_free(char *str)
+{
+	if (str) {
+		size_t len = os_strlen(str);
+		os_memset(str, 0, len);
+		os_free(str);
+	}
+}
+
+int os_gmtime(os_time_t t, struct os_tm *tm)
+{
+	struct tm *tm2;
+	time_t t2 = t;
+
+	tm2 = gmtime(&t2);
+	if (tm2 == NULL)
+		return -1;
+	tm->sec = tm2->tm_sec;
+	tm->min = tm2->tm_min;
+	tm->hour = tm2->tm_hour;
+	tm->day = tm2->tm_mday;
+	tm->month = tm2->tm_mon + 1;
+	tm->year = tm2->tm_year + 1900;
+	return 0;
+}
+
+int os_mktime(int year, int month, int day, int hour, int min, int sec,
+		os_time_t *t)
+{
+	struct tm tm;
+
+	if (year < 1970 || month < 1 || month > 12 || day < 1 || day > 31 ||
+			hour < 0 || hour > 23 || min < 0 || min > 59 || sec < 0 ||
+			sec > 60)
+		return -1;
+
+	os_memset(&tm, 0, sizeof(tm));
+	tm.tm_year = year - 1900;
+	tm.tm_mon = month - 1;
+	tm.tm_mday = day;
+	tm.tm_hour = hour;
+	tm.tm_min = min;
+	tm.tm_sec = sec;
+
+	*t = (os_time_t) mktime(&tm);
+	return 0;
+}
+
+char * get_param(const char *cmd, const char *param)
+{
+	const char *pos, *end;
+	char *val;
+	size_t len;
+
+	pos = os_strstr(cmd, param);
+	if (!pos)
+		return NULL;
+
+	pos += os_strlen(param);
+	end = os_strchr(pos, ' ');
+	if (end)
+		len = end - pos;
+	else
+		len = os_strlen(pos);
+	val = os_malloc(len + 1);
+	if (!val)
+		return NULL;
+	os_memcpy(val, pos, len);
+	val[len] = '\0';
+	return val;
+}
+
+void * os_memdup(const void *src, size_t len)
+{
+	void *r = os_malloc(len);
+
+	if (r && src)
+		os_memcpy(r, src, len);
+	return r;
+}
+
+/**
+ * hwaddr_aton2 - Convert ASCII string to MAC address (in any known format)
+ * @txt: MAC address as a string (e.g., 00:11:22:33:44:55 or 0011.2233.4455)
+ * @addr: Buffer for the MAC address (ETH_ALEN = 6 bytes)
+ * Returns: Characters used (> 0) on success, -1 on failure
+ */
+int hwaddr_aton2(const char *txt, u8 *addr)
+{
+	int i;
+	const char *pos = txt;
+
+	for (i = 0; i < 6; i++) {
+		int a, b;
+
+		while (*pos == ':' || *pos == '.' || *pos == '-')
+			pos++;
+
+		a = hex2num(*pos++);
+		if (a < 0)
+			return -1;
+		b = hex2num(*pos++);
+		if (b < 0)
+			return -1;
+		*addr++ = (a << 4) | b;
+	}
+
+	return pos - txt;
+}