comparison: src/server/daemon/keyfile_auth.c
src/server/daemon/keyfile_auth.c
- changeset 62
- c47e081b6c0f
- child 63
- 66442f81f823
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| 1 /* | |
| 2 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER. | |
| 3 * | |
| 4 * Copyright 2013 Olaf Wintermann. All rights reserved. | |
| 5 * | |
| 6 * Redistribution and use in source and binary forms, with or without | |
| 7 * modification, are permitted provided that the following conditions are met: | |
| 8 * | |
| 9 * 1. Redistributions of source code must retain the above copyright | |
| 10 * notice, this list of conditions and the following disclaimer. | |
| 11 * | |
| 12 * 2. Redistributions in binary form must reproduce the above copyright | |
| 13 * notice, this list of conditions and the following disclaimer in the | |
| 14 * documentation and/or other materials provided with the distribution. | |
| 15 * | |
| 16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" | |
| 17 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
| 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE | |
| 20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
| 21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
| 22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS | |
| 23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN | |
| 24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
| 25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |
| 26 * POSSIBILITY OF SUCH DAMAGE. | |
| 27 */ | |
| 28 | |
| 29 #include <stdio.h> | |
| 30 #include <stdlib.h> | |
| 31 #include <string.h> | |
| 32 #include <openssl/sha.h> | |
| 33 | |
| 34 #include "../util/atomic.h" | |
| 35 #include "../util/util.h" | |
| 36 | |
| 37 #include "keyfile_auth.h" | |
| 38 | |
| 39 Keyfile* keyfile_new() { | |
| 40 Keyfile *keyfile = malloc(sizeof(Keyfile)); | |
| 41 keyfile->authdb.get_user = keyfile_get_user; | |
| 42 keyfile->users = ucx_map_new(16); | |
| 43 keyfile->ref = 1; | |
| 44 return keyfile; | |
| 45 } | |
| 46 | |
| 47 void keyfile_ref(Keyfile *keyfile) { | |
| 48 ws_atomic_inc32(&keyfile->ref); | |
| 49 } | |
| 50 | |
| 51 void keyfile_unref(Keyfile *keyfile) { | |
| 52 uint32_t ref = ws_atomic_dec32(&keyfile->ref); | |
| 53 if(ref == 0) { | |
| 54 UcxMapIterator i = ucx_map_iterator(keyfile->users); | |
| 55 KeyfileUser *user; | |
| 56 UCX_MAP_FOREACH(user, i) { | |
| 57 free(user->user.name); | |
| 58 free(user->hash); | |
| 59 for(int i=0;i<user->numgroups;i++) { | |
| 60 free(user->groups[i].ptr); | |
| 61 } | |
| 62 free(user->groups); | |
| 63 } | |
| 64 ucx_map_free(keyfile->users); | |
| 65 | |
| 66 free(keyfile->authdb.name); | |
| 67 free(keyfile); | |
| 68 } | |
| 69 } | |
| 70 | |
| 71 void keyfile_add_user( | |
| 72 Keyfile *keyfile, | |
| 73 sstr_t name, | |
| 74 enum KeyfileHashType hash_type, | |
| 75 sstr_t hash, | |
| 76 sstr_t *groups, | |
| 77 size_t ngroups) | |
| 78 { | |
| 79 if(hash.length < 12) { | |
| 80 // hash too short | |
| 81 // TODO: log | |
| 82 return; | |
| 83 } | |
| 84 | |
| 85 KeyfileUser *user = malloc(sizeof(KeyfileUser)); | |
| 86 user->user.name = sstrdup(name).ptr; | |
| 87 user->user.verify_password = keyfile_user_verify_password; | |
| 88 user->user.check_group = keyfile_user_check_group; | |
| 89 user->user.free = keyfile_user_free; | |
| 90 | |
| 91 user->hash_type = hash_type; | |
| 92 user->hash = malloc(hash.length + 1); | |
| 93 user->hashlen = util_base64decode(hash.ptr, hash.length, user->hash); | |
| 94 | |
| 95 user->groups = calloc(ngroups, sizeof(sstr_t)); | |
| 96 for(int i=0;i<ngroups;i++) { | |
| 97 //user->groups[i] = sstrdup(groups[i]); | |
| 98 sstrdup(groups[i]); | |
| 99 } | |
| 100 | |
| 101 // add to keyfile | |
| 102 ucx_map_sstr_put(keyfile->users, name, user); | |
| 103 } | |
| 104 | |
| 105 // authdb functions | |
| 106 | |
| 107 User* keyfile_get_user(AuthDB *db, char *user) { | |
| 108 Keyfile *keyfile = (Keyfile*)db; | |
| 109 return ucx_map_cstr_get(keyfile->users, user); | |
| 110 } | |
| 111 | |
| 112 int keyfile_user_verify_password(User *user, char *password) { | |
| 113 KeyfileUser *usr = (KeyfileUser*)user; | |
| 114 switch(usr->hash_type) { | |
| 115 case KEYFILE_SSHA: return ssha_verify(usr, password); | |
| 116 } | |
| 117 return 0; | |
| 118 } | |
| 119 | |
| 120 int keyfile_user_check_group(User *user, char *group) { | |
| 121 KeyfileUser *usr = (KeyfileUser*)user; | |
| 122 sstr_t grp = sstr(group); | |
| 123 for(int i=0;i<usr->numgroups;i++) { | |
| 124 if(!sstrcmp(usr->groups[i], grp)) { | |
| 125 return 1; | |
| 126 } | |
| 127 } | |
| 128 return 0; | |
| 129 } | |
| 130 | |
| 131 void keyfile_user_free(User *user) { | |
| 132 // don't free, it will be freed by keyfile_unref | |
| 133 } | |
| 134 | |
| 135 | |
| 136 int ssha_verify(KeyfileUser *user, char *password) { | |
| 137 /* | |
| 138 * SSHA: SHA1(pw + salt) + 8 bytes salt | |
| 139 * the SSHA hash is already base64 decoded | |
| 140 */ | |
| 141 | |
| 142 char *salt = user->hash + user->hashlen - 8; // last 8 bytes are salt | |
| 143 size_t pwlen = strlen(password); | |
| 144 | |
| 145 size_t saltpwlen = pwlen + 8; | |
| 146 char *saltpw = malloc(saltpwlen); | |
| 147 memcpy(saltpw, password, pwlen); | |
| 148 memcpy(saltpw + pwlen, salt, 8); | |
| 149 | |
| 150 unsigned char pwhash[20]; | |
| 151 SHA1((const unsigned char*)saltpw, saltpwlen, pwhash); | |
| 152 | |
| 153 if(!memcmp(user->hash, pwhash, 20)) { | |
| 154 return 1; | |
| 155 } | |
| 156 | |
| 157 return 0; | |
| 158 } |
