1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2012 The FreeBSD Foundation 5 * 6 * This software was developed by Edward Tomasz Napierala under sponsorship 7 * from the FreeBSD Foundation. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 */ 30 31 #include <ctype.h> 32 #include <string.h> 33 34 #include "libiscsiutil.h" 35 36 #define MAX_NAME_LEN 223 37 38 char * 39 checked_strdup(const char *s) 40 { 41 char *c; 42 43 c = strdup(s); 44 if (c == NULL) 45 log_err(1, "strdup"); 46 return (c); 47 } 48 49 bool 50 valid_iscsi_name(const char *name, void (*warn_fn)(const char *, ...)) 51 { 52 int i; 53 54 if (strlen(name) >= MAX_NAME_LEN) { 55 warn_fn("overlong name for target \"%s\"; max length allowed " 56 "by iSCSI specification is %d characters", 57 name, MAX_NAME_LEN); 58 return (false); 59 } 60 61 /* 62 * In the cases below, we don't return an error, just in case the admin 63 * was right, and we're wrong. 64 */ 65 if (strncasecmp(name, "iqn.", strlen("iqn.")) == 0) { 66 for (i = strlen("iqn."); name[i] != '\0'; i++) { 67 /* 68 * XXX: We should verify UTF-8 normalisation, as defined 69 * by 3.2.6.2: iSCSI Name Encoding. 70 */ 71 if (isalnum(name[i])) 72 continue; 73 if (name[i] == '-' || name[i] == '.' || name[i] == ':') 74 continue; 75 warn_fn("invalid character \"%c\" in target name " 76 "\"%s\"; allowed characters are letters, digits, " 77 "'-', '.', and ':'", name[i], name); 78 break; 79 } 80 /* 81 * XXX: Check more stuff: valid date and a valid reversed domain. 82 */ 83 } else if (strncasecmp(name, "eui.", strlen("eui.")) == 0) { 84 if (strlen(name) != strlen("eui.") + 16) 85 warn_fn("invalid target name \"%s\"; the \"eui.\" " 86 "should be followed by exactly 16 hexadecimal " 87 "digits", name); 88 for (i = strlen("eui."); name[i] != '\0'; i++) { 89 if (!isxdigit(name[i])) { 90 warn_fn("invalid character \"%c\" in target " 91 "name \"%s\"; allowed characters are 1-9 " 92 "and A-F", name[i], name); 93 break; 94 } 95 } 96 } else if (strncasecmp(name, "naa.", strlen("naa.")) == 0) { 97 if (strlen(name) > strlen("naa.") + 32) 98 warn_fn("invalid target name \"%s\"; the \"naa.\" " 99 "should be followed by at most 32 hexadecimal " 100 "digits", name); 101 for (i = strlen("naa."); name[i] != '\0'; i++) { 102 if (!isxdigit(name[i])) { 103 warn_fn("invalid character \"%c\" in target " 104 "name \"%s\"; allowed characters are 1-9 " 105 "and A-F", name[i], name); 106 break; 107 } 108 } 109 } else { 110 warn_fn("invalid target name \"%s\"; should start with " 111 "either \"iqn.\", \"eui.\", or \"naa.\"", 112 name); 113 } 114 return (true); 115 } 116