1 /* 2 * Universally Unique IDentifier (UUID) 3 * Copyright (c) 2008, Jouni Malinen <j (at) w1.fi> 4 * 5 * This software may be distributed under the terms of the BSD license. 6 * See README for more details. 7 */ 8 9 #include "includes.h" 10 11 #include "common.h" 12 #include "uuid.h" 13 14 int uuid_str2bin(const char *str, u8 *bin) 15 { 16 const char *pos; 17 u8 *opos; 18 19 pos = str; 20 opos = bin; 21 22 if (hexstr2bin(pos, opos, 4)) 23 return -1; 24 pos += 8; 25 opos += 4; 26 27 if (*pos++ != '-' || hexstr2bin(pos, opos, 2)) 28 return -1; 29 pos += 4; 30 opos += 2; 31 32 if (*pos++ != '-' || hexstr2bin(pos, opos, 2)) 33 return -1; 34 pos += 4; 35 opos += 2; 36 37 if (*pos++ != '-' || hexstr2bin(pos, opos, 2)) 38 return -1; 39 pos += 4; 40 opos += 2; 41 42 if (*pos++ != '-' || hexstr2bin(pos, opos, 6)) 43 return -1; 44 45 return 0; 46 } 47 48 49 int uuid_bin2str(const u8 *bin, char *str, size_t max_len) 50 { 51 int len; 52 len = os_snprintf(str, max_len, "%02x%02x%02x%02x-%02x%02x-%02x%02x-" 53 "%02x%02x-%02x%02x%02x%02x%02x%02x", 54 bin[0], bin[1], bin[2], bin[3], 55 bin[4], bin[5], bin[6], bin[7], 56 bin[8], bin[9], bin[10], bin[11], 57 bin[12], bin[13], bin[14], bin[15]); 58 if (len < 0 || (size_t) len >= max_len) 59 return -1; 60 return 0; 61 } 62 63 64 int is_nil_uuid(const u8 *uuid) 65 { 66 int i; 67 for (i = 0; i < UUID_LEN; i++) 68 if (uuid[i]) 69 return 0; 70 return 1; 71 } 72
