199767f8919635c4928607450d9e0abb932109ceToomas Soome/*-
199767f8919635c4928607450d9e0abb932109ceToomas Soome * Copyright (c) 2015 M. Warner Losh
199767f8919635c4928607450d9e0abb932109ceToomas Soome * All rights reserved.
199767f8919635c4928607450d9e0abb932109ceToomas Soome *
199767f8919635c4928607450d9e0abb932109ceToomas Soome * Redistribution and use in source and binary forms, with or without
199767f8919635c4928607450d9e0abb932109ceToomas Soome * modification, are permitted provided that the following conditions
199767f8919635c4928607450d9e0abb932109ceToomas Soome * are met:
199767f8919635c4928607450d9e0abb932109ceToomas Soome * 1. Redistributions of source code must retain the above copyright
199767f8919635c4928607450d9e0abb932109ceToomas Soome * notice, this list of conditions and the following disclaimer.
199767f8919635c4928607450d9e0abb932109ceToomas Soome * 2. Redistributions in binary form must reproduce the above copyright
199767f8919635c4928607450d9e0abb932109ceToomas Soome * notice, this list of conditions and the following disclaimer in the
199767f8919635c4928607450d9e0abb932109ceToomas Soome * documentation and/or other materials provided with the distribution.
199767f8919635c4928607450d9e0abb932109ceToomas Soome *
199767f8919635c4928607450d9e0abb932109ceToomas Soome * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
199767f8919635c4928607450d9e0abb932109ceToomas Soome * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
199767f8919635c4928607450d9e0abb932109ceToomas Soome * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
199767f8919635c4928607450d9e0abb932109ceToomas Soome * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
199767f8919635c4928607450d9e0abb932109ceToomas Soome * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
199767f8919635c4928607450d9e0abb932109ceToomas Soome * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
199767f8919635c4928607450d9e0abb932109ceToomas Soome * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
199767f8919635c4928607450d9e0abb932109ceToomas Soome * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
199767f8919635c4928607450d9e0abb932109ceToomas Soome * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
199767f8919635c4928607450d9e0abb932109ceToomas Soome * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
199767f8919635c4928607450d9e0abb932109ceToomas Soome * SUCH DAMAGE.
199767f8919635c4928607450d9e0abb932109ceToomas Soome *
199767f8919635c4928607450d9e0abb932109ceToomas Soome * $FreeBSD$
199767f8919635c4928607450d9e0abb932109ceToomas Soome */
199767f8919635c4928607450d9e0abb932109ceToomas Soome
199767f8919635c4928607450d9e0abb932109ceToomas Soome/*
199767f8919635c4928607450d9e0abb932109ceToomas Soome * Note: some comments taken from lib/libc/uuid/uuid_from_string.c
199767f8919635c4928607450d9e0abb932109ceToomas Soome * Copyright (c) 2002 Marcel Moolenaar
199767f8919635c4928607450d9e0abb932109ceToomas Soome * Copyright (c) 2002 Hiten Mahesh Pandya
199767f8919635c4928607450d9e0abb932109ceToomas Soome */
199767f8919635c4928607450d9e0abb932109ceToomas Soome
199767f8919635c4928607450d9e0abb932109ceToomas Soome
199767f8919635c4928607450d9e0abb932109ceToomas Soome#include <stand.h>
199767f8919635c4928607450d9e0abb932109ceToomas Soome#include <uuid.h>
199767f8919635c4928607450d9e0abb932109ceToomas Soome
199767f8919635c4928607450d9e0abb932109ceToomas Soomestatic int
199767f8919635c4928607450d9e0abb932109ceToomas Soomehex2int(int ch)
199767f8919635c4928607450d9e0abb932109ceToomas Soome{
199767f8919635c4928607450d9e0abb932109ceToomas Soome if (ch >= '0' && ch <= '9')
199767f8919635c4928607450d9e0abb932109ceToomas Soome return ch - '0';
199767f8919635c4928607450d9e0abb932109ceToomas Soome if (ch >= 'a' && ch <= 'f')
199767f8919635c4928607450d9e0abb932109ceToomas Soome return 10 + ch - 'a';
199767f8919635c4928607450d9e0abb932109ceToomas Soome if (ch >= 'A' && ch <= 'F')
199767f8919635c4928607450d9e0abb932109ceToomas Soome return 10 + ch - 'A';
199767f8919635c4928607450d9e0abb932109ceToomas Soome return 16;
199767f8919635c4928607450d9e0abb932109ceToomas Soome}
199767f8919635c4928607450d9e0abb932109ceToomas Soome
199767f8919635c4928607450d9e0abb932109ceToomas Soomestatic uint32_t
199767f8919635c4928607450d9e0abb932109ceToomas Soomefromhex(const char *s, int len, int *ok)
199767f8919635c4928607450d9e0abb932109ceToomas Soome{
199767f8919635c4928607450d9e0abb932109ceToomas Soome uint32_t v;
199767f8919635c4928607450d9e0abb932109ceToomas Soome int i, h;
199767f8919635c4928607450d9e0abb932109ceToomas Soome
199767f8919635c4928607450d9e0abb932109ceToomas Soome if (!*ok)
199767f8919635c4928607450d9e0abb932109ceToomas Soome return 0;
199767f8919635c4928607450d9e0abb932109ceToomas Soome v = 0;
dd5bccd7cf5f24c78ff320fd70b55522e4cdc406Toomas Soome for (i = 0; i < len; i++) {
199767f8919635c4928607450d9e0abb932109ceToomas Soome h = hex2int(s[i]);
199767f8919635c4928607450d9e0abb932109ceToomas Soome if (h == 16) {
199767f8919635c4928607450d9e0abb932109ceToomas Soome *ok = 0;
199767f8919635c4928607450d9e0abb932109ceToomas Soome return v;
199767f8919635c4928607450d9e0abb932109ceToomas Soome }
199767f8919635c4928607450d9e0abb932109ceToomas Soome v = (v << 4) | h;
199767f8919635c4928607450d9e0abb932109ceToomas Soome }
199767f8919635c4928607450d9e0abb932109ceToomas Soome return v;
199767f8919635c4928607450d9e0abb932109ceToomas Soome}
199767f8919635c4928607450d9e0abb932109ceToomas Soome
199767f8919635c4928607450d9e0abb932109ceToomas Soome/*
199767f8919635c4928607450d9e0abb932109ceToomas Soome * uuid_from_string() - convert a string representation of an UUID into
199767f8919635c4928607450d9e0abb932109ceToomas Soome * a binary representation.
199767f8919635c4928607450d9e0abb932109ceToomas Soome * See also:
199767f8919635c4928607450d9e0abb932109ceToomas Soome * http://www.opengroup.org/onlinepubs/009629399/uuid_from_string.htm
199767f8919635c4928607450d9e0abb932109ceToomas Soome *
199767f8919635c4928607450d9e0abb932109ceToomas Soome * NOTE: The sequence field is in big-endian, while the time fields are in
199767f8919635c4928607450d9e0abb932109ceToomas Soome * native byte order.
199767f8919635c4928607450d9e0abb932109ceToomas Soome *
199767f8919635c4928607450d9e0abb932109ceToomas Soome * 01234567-89ab-cdef-0123-456789abcdef
199767f8919635c4928607450d9e0abb932109ceToomas Soome * 000000000011111111112222222222333333
199767f8919635c4928607450d9e0abb932109ceToomas Soome * 012345678901234567890123456789012345
199767f8919635c4928607450d9e0abb932109ceToomas Soome * - - - -
199767f8919635c4928607450d9e0abb932109ceToomas Soome * hhhhhhhh-hhhh-hhhh-bbbb-bbbbbbbbbbbb
199767f8919635c4928607450d9e0abb932109ceToomas Soome *
199767f8919635c4928607450d9e0abb932109ceToomas Soome */
199767f8919635c4928607450d9e0abb932109ceToomas Soomevoid
199767f8919635c4928607450d9e0abb932109ceToomas Soomeuuid_from_string(const char *s, uuid_t *u, uint32_t *status)
199767f8919635c4928607450d9e0abb932109ceToomas Soome{
199767f8919635c4928607450d9e0abb932109ceToomas Soome int ok = 1;
199767f8919635c4928607450d9e0abb932109ceToomas Soome int n;
199767f8919635c4928607450d9e0abb932109ceToomas Soome
199767f8919635c4928607450d9e0abb932109ceToomas Soome if (s == NULL || *s == '\0') {
199767f8919635c4928607450d9e0abb932109ceToomas Soome uuid_create_nil(u, status);
199767f8919635c4928607450d9e0abb932109ceToomas Soome return;
199767f8919635c4928607450d9e0abb932109ceToomas Soome }
199767f8919635c4928607450d9e0abb932109ceToomas Soome
199767f8919635c4928607450d9e0abb932109ceToomas Soome if (status != NULL)
199767f8919635c4928607450d9e0abb932109ceToomas Soome *status = uuid_s_invalid_string_uuid;
199767f8919635c4928607450d9e0abb932109ceToomas Soome if (strlen(s) != 36)
199767f8919635c4928607450d9e0abb932109ceToomas Soome return;
199767f8919635c4928607450d9e0abb932109ceToomas Soome /* Only support new format, check for all the right dashes */
199767f8919635c4928607450d9e0abb932109ceToomas Soome if (s[8] != '-' || s[13] != '-' || s[18] != '-' || s[23] != '-')
199767f8919635c4928607450d9e0abb932109ceToomas Soome return;
199767f8919635c4928607450d9e0abb932109ceToomas Soome /* native byte order */
199767f8919635c4928607450d9e0abb932109ceToomas Soome u->time_low = fromhex(s , 8, &ok);
199767f8919635c4928607450d9e0abb932109ceToomas Soome u->time_mid = fromhex(s + 9, 4, &ok);
199767f8919635c4928607450d9e0abb932109ceToomas Soome u->time_hi_and_version = fromhex(s + 14, 4, &ok);
199767f8919635c4928607450d9e0abb932109ceToomas Soome /* Big endian, but presented as a whole number so decode as such */
199767f8919635c4928607450d9e0abb932109ceToomas Soome u->clock_seq_hi_and_reserved = fromhex(s + 19, 2, &ok);
199767f8919635c4928607450d9e0abb932109ceToomas Soome u->clock_seq_low = fromhex(s + 21, 2, &ok);
199767f8919635c4928607450d9e0abb932109ceToomas Soome u->node[0] = fromhex(s + 24, 2, &ok);
199767f8919635c4928607450d9e0abb932109ceToomas Soome u->node[1] = fromhex(s + 26, 2, &ok);
199767f8919635c4928607450d9e0abb932109ceToomas Soome u->node[2] = fromhex(s + 28, 2, &ok);
199767f8919635c4928607450d9e0abb932109ceToomas Soome u->node[3] = fromhex(s + 30, 2, &ok);
199767f8919635c4928607450d9e0abb932109ceToomas Soome u->node[4] = fromhex(s + 32, 2, &ok);
199767f8919635c4928607450d9e0abb932109ceToomas Soome u->node[5] = fromhex(s + 34, 2, &ok);
199767f8919635c4928607450d9e0abb932109ceToomas Soome if (!ok)
199767f8919635c4928607450d9e0abb932109ceToomas Soome return;
199767f8919635c4928607450d9e0abb932109ceToomas Soome
199767f8919635c4928607450d9e0abb932109ceToomas Soome /* We have a successful scan. Check semantics... */
199767f8919635c4928607450d9e0abb932109ceToomas Soome n = u->clock_seq_hi_and_reserved;
199767f8919635c4928607450d9e0abb932109ceToomas Soome if ((n & 0x80) != 0x00 && /* variant 0? */
199767f8919635c4928607450d9e0abb932109ceToomas Soome (n & 0xc0) != 0x80 && /* variant 1? */
199767f8919635c4928607450d9e0abb932109ceToomas Soome (n & 0xe0) != 0xc0) { /* variant 2? */
199767f8919635c4928607450d9e0abb932109ceToomas Soome if (status != NULL)
199767f8919635c4928607450d9e0abb932109ceToomas Soome *status = uuid_s_bad_version;
199767f8919635c4928607450d9e0abb932109ceToomas Soome } else {
199767f8919635c4928607450d9e0abb932109ceToomas Soome if (status != NULL)
199767f8919635c4928607450d9e0abb932109ceToomas Soome *status = uuid_s_ok;
199767f8919635c4928607450d9e0abb932109ceToomas Soome }
199767f8919635c4928607450d9e0abb932109ceToomas Soome}