components/wpa_supplicant/src/utils/uuid.c (ESP-IDF)

/* * Universally Unique IDentifier (UUID) * Copyright (c) 2008, Jouni Malinen <j@w1.fi> * * This software may be distributed under the terms of the BSD license. * See README for more details. */ #include "utils/includes.h" #include "utils/common.h" #include "utils/uuid.h" int uuid_str2bin(const char *str, u8 *bin) { const char *pos; u8 *opos; pos = str; opos = bin; if (hexstr2bin(pos, opos, 4)) return -1; pos += 8; opos += 4; if (*pos++ != '-' || hexstr2bin(pos, opos, 2)) return -1; pos += 4; opos += 2; if (*pos++ != '-' || hexstr2bin(pos, opos, 2)) return -1; pos += 4; opos += 2; if (*pos++ != '-' || hexstr2bin(pos, opos, 2)) return -1; pos += 4; opos += 2; if (*pos++ != '-' || hexstr2bin(pos, opos, 6)) return -1; return 0; } int uuid_bin2str(const u8 *bin, char *str, size_t max_len) { int len; len = snprintf(str, max_len, "%02x%02x%02x%02x-%02x%02x-%02x%02x-" "%02x%02x-%02x%02x%02x%02x%02x%02x", bin[0], bin[1], bin[2], bin[3], bin[4], bin[5], bin[6], bin[7], bin[8], bin[9], bin[10], bin[11], bin[12], bin[13], bin[14], bin[15]); if (len < 0 || (size_t) len >= max_len) return -1; return 0; } int is_nil_uuid(const u8 *uuid) { int i; for (i = 0; i < UUID_LEN; i++) if (uuid[i]) return 0; return 1; }