/usr/share/perl5/EBox/Samba/Credentials.pm is in zentyal-samba 2.3.12+quantal1ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 | # Copyright (C) 2012 eBox Technologies S.L.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License, version 2, as
# published by the Free Software Foundation.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
package EBox::Samba::Credentials;
use strict;
use warnings;
use EBox::Exceptions::MissingArgument;
use EBox::Exceptions::Internal;
use Encode;
sub new
{
my ($class, %params) = @_;
my $self = {};
bless ($self, $class);
unless ($params{krb5Keys} or $params{unicodePwd} or $params{supplementalCredentials}) {
throw EBox::Exceptions::MissingArgument('krb5Keys or unicodePwd or supplementalCredentials');
}
if (exists $params{krb5Keys}) {
my $encoded = $self->_encodeSambaCredentials($params{krb5Keys});
$self->{krb5Keys} = $params{krb5Keys};
$self->{unicodePwd} = $encoded->{unicodePwd};
$self->{supplementalCredentials} = $encoded->{supplementalCredentials};
} elsif (exists $params{unicodePwd} or exists $params{supplementalCredential}) {
my $decoded = $self->_decodeSambaCredentials($params{supplementalCredentials}, $params{unicodePwd});
$self->{unicodePwd} = $params{unicodePwd};
$self->{supplementalCredentials} = $params{supplementalCredentials};
$self->{krb5Keys} = $decoded->{kerberosKeys};
}
return $self;
}
sub kerberosKeys
{
my ($self) = @_;
return $self->{krb5Keys};
}
sub supplementalCredentials
{
my ($self) = @_;
return $self->{supplementalCredentials};
}
sub unicodePwd
{
my ($self) = @_;
return $self->{unicodePwd};
}
###########################################################
## Encoding Section ##
###########################################################
sub _encodeKerberosKeyData
{
my ($self, $key, $keyOffset) = @_;
my $reserved1 = 0;
my $reserved2 = 0;
my $reserved3 = 0;
my $keyType = $key->{type};
my $keyLength = length ($key->{value});
my $blob = pack ('s s l L L l',
$reserved1, $reserved2, $reserved3,
$keyType, $keyLength, $keyOffset);
return $blob;
}
sub _encodeKerberosProperty
{
my ($self, $keys, $oldKeys) = @_;
my $salt = @{$keys}[0]->{salt}; # FIXME
$salt = encode('UTF16-LE', $salt);
my $defaultSaltLength = length ($salt);
my $defaultSaltMaxLength = length ($salt);
my $credentials = [];
my $oldCredentials = [];
my $keyValues = [];
my $keyValueOffset = 16 + 20 + (scalar @{$keys} * 20) + $defaultSaltLength;
foreach my $key (@{$keys}) {
push ($credentials, $self->_encodeKerberosKeyData($key, $keyValueOffset));
push ($keyValues, $key->{value});
$keyValueOffset += 8;
}
foreach my $key (@{$oldKeys}) {
push ($oldCredentials, $self->_encodeKerberosKeyData($key, $keyValueOffset));
push ($keyValues, $key->{value});
$keyValueOffset += 8;
}
my $revision = 3;
my $flags = 0;
my $credentialCount = scalar @{$credentials};
my $oldCredentialCount = scalar @{$oldCredentials};
my $credentialsString = join ('', @{$credentials});
my $oldCredentialsString = join ('', @{$oldCredentials});
my $valuesString = join ('', @{$keyValues});
my $defaultSaltOffset = 16 + 20 + length ($credentialsString) + length ($oldCredentialsString);
my $blob = pack ('s s s s s s L a* x20 a* a* a*',
$revision, $flags,
$credentialCount, $oldCredentialCount,
$defaultSaltLength, $defaultSaltMaxLength,
$defaultSaltOffset,
$credentialsString,
$oldCredentialsString,
$salt, $valuesString);
return $blob;
}
sub _encodeWDigestProperty
{
my ($self, $sam, $principal, $netbios, $dns, $pwd) = @_;
$sam = encode("iso-8859-1", $sam);
$principal = encode("iso-8859-1", $principal);
$netbios = encode("iso-8859-1", $netbios);
$dns = encode("iso-8859-1", $dns);
$pwd = encode("iso-8859-1", $pwd);
my $reserved1 = 0;
my $reserved2 = 0;
my $version = 1;
my $numHashes = 29;
my $hashes = [];
push ($hashes, md5_hex($sam . $netbios . $pwd)); # 1
push ($hashes, md5_hex(uc($sam) . uc($netbios) . $pwd)); # 2
push ($hashes, md5_hex(lc($sam) . lc($netbios) . $pwd)); # 3
push ($hashes, md5_hex($sam . uc($netbios) . $pwd)); # 4
push ($hashes, md5_hex($sam . lc($netbios) . $pwd)); # 5
push ($hashes, md5_hex(uc($sam) . lc($netbios) . $pwd)); # 6
push ($hashes, md5_hex(lc($sam) . uc($netbios) . $pwd)); # 7
push ($hashes, md5_hex($sam . $dns . $pwd)); # 8
push ($hashes, md5_hex(uc($sam) . uc($dns) . $pwd)); # 9
push ($hashes, md5_hex(lc($sam) . lc($dns) . $pwd)); # 10
push ($hashes, md5_hex($sam . uc($dns) . $pwd)); # 11
push ($hashes, md5_hex($sam . lc($dns) . $pwd)); # 12
push ($hashes, md5_hex(uc($sam) . lc($dns) . $pwd)); # 13
push ($hashes, md5_hex(lc($sam) . uc($dns) . $pwd)); # 14
push ($hashes, md5_hex($principal . $pwd)); # 15
push ($hashes, md5_hex(uc($principal) . $pwd)); # 16
push ($hashes, md5_hex(lc($principal) . $pwd)); # 17
push ($hashes, md5_hex($netbios . '\\' . $sam . $pwd)); # 18
push ($hashes, md5_hex(uc($netbios . '\\' . $sam) . $pwd)); # 19
push ($hashes, md5_hex(lc($netbios . '\\' . $sam) . $pwd)); # 20
push ($hashes, md5_hex($sam . 'Digest' . $pwd)); # 21
push ($hashes, md5_hex(uc($sam) . 'DIGEST' . $pwd)); # 22
push ($hashes, md5_hex(lc($sam) . 'digest' . $pwd)); # 23
push ($hashes, md5_hex($principal . 'Digest' . $pwd)); # 24
push ($hashes, md5_hex(uc($principal) . 'DIGEST' . $pwd)); # 25
push ($hashes, md5_hex(lc($principal) . 'digest' . $pwd)); # 26
push ($hashes, md5_hex($netbios . '\\' . $sam . 'Digest' . $pwd)); # 27
push ($hashes, md5_hex(uc($netbios . '\\' . $sam) . 'DIGEST' . $pwd)); # 28
push ($hashes, md5_hex(lc($netbios . '\\' . $sam) . 'digest' . $pwd)); # 29
my $blob = pack ('W W W W x12 a*',
$reserved1, $reserved2,
$version, $numHashes,
join ('', @{$hashes}));
return $blob;
}
sub _encodeUserProperty
{
my ($self, $name, $value) = @_;
my $propertyName = encode('UTF16-LE', $name);
my $propertyValue = uc(unpack ('H*', $value));
my $nameLength = length ($propertyName);
my $valueLength = length ($propertyValue);
my $reserved = 0;
my $blob = pack ('s s s a* a*',
$nameLength, $valueLength, $reserved,
$propertyName, $propertyValue);
return $blob;
}
sub _encodeUserProperties
{
my ($self, $kerberosKeys, $digest) = @_;
my @packages = ();
my $userProperties = '';
my $reserved1 = 0;
my $reserved2 = 0;
my $reserved3 = 0;
my $reserved4 = '';
my $reserved5 = 0;
my $signature = 0x50;
my $propertyCount = (defined $kerberosKeys) + (defined $digest) + 1;
# Samba4 expects reserved4 to be an array of '0x2000'
for (my $i=0; $i<48; $i++) {
$reserved4 .= pack('H*', 2000);
}
if (defined $kerberosKeys) {
my $kerberosProperty = $self->_encodeKerberosProperty($kerberosKeys);
$userProperties .= $self->_encodeUserProperty('Primary:Kerberos', $kerberosProperty);
push (@packages, encode('UTF16-LE', 'Kerberos'));
}
if (defined $digest) {
my $wdigestProperty = $self->_encodeWDigestProperty(
$digest->{sam},
$digest->{principal},
$digest->{netbios},
$digest->{dns},
$digest->{pwd});
$userProperties .= $self->_encodeUserProperty('Primary:WDigest', $wdigestProperty);
push (@packages, encode('UTF16-LE', 'WDigest'));
}
my $packagesStr = join(encode('UTF16-LE', "\0"), @packages);
$userProperties .= $self->_encodeUserProperty('Packages', $packagesStr);
my $length = 4 + 96 + length ($userProperties);
my $blobFormat = 'l L s s a* s s a* W';
my $blob = pack ($blobFormat, $reserved1, $length,
$reserved2, $reserved3,
$reserved4,
$signature, $propertyCount,
$userProperties, $reserved5);
return $blob;
}
sub _encodeSambaCredentials
{
my ($self, $krbKeys) = @_;
unless (defined $krbKeys) {
throw EBox::Exceptions::MissingArgument('krbKeys');
}
my $credentials = {};
# Remove the type 23 from keys because it is the unicodePwd attribute
# and make sure type 3 is the first in the array, it must be the first
# key or samba will fail to write the supplementalCredentials attribute
my $newList = [];
foreach my $key (@{$krbKeys}) {
if ($key->{type} == 23) {
$credentials->{unicodePwd} = $key->{value};
next;
} elsif ($key->{type} == 3) {
@{$newList}[0] = $key;
next;
} elsif ($key->{type} == 1) {
@{$newList}[1] = $key;
next;
}
}
if (scalar @{$krbKeys} >= 2) {
$credentials->{supplementalCredentials} = $self->_encodeUserProperties($newList);
}
return $credentials;
}
###########################################################
## Decoding Section ##
###########################################################
# Method: _decodeWDigest
#
# Docode the WDIGEST_CREDENTIALS struct. This struct
# contains 29 different hashes produced by combinations
# of different elements including the sAMAccountName,
# realm, host, etc. The format is documented at:
# http://msdn.microsoft.com/en-us/library/cc245502(v=prot.10).aspx
# The list of included hashes is documented at:
# http://msdn.microsoft.com/en-us/library/cc245680(v=prot.10).aspx
#
# Returns:
#
# An array reference containing the hashes
#
sub _decodeWDigest
{
my ($self, $data) = @_;
my $hashes = ();
my $format = 'x4 a2 a2 x24 (a32)29';
if (length ($data) == 960) {
my ($version, $nHashes, @hashValues) = unpack($format, $data);
$version = hex($version);
$nHashes = hex($nHashes);
if ($version == 1 and $nHashes == 29) {
$hashes = \@hashValues;
}
}
return $hashes;
}
# Method: _decodeKerberos
#
# Decode the KERB_STORED_CREDENTIAL struct. This struct
# contains the hashes of the kerberos keys. Its format
# is documented at:
# http://msdn.microsoft.com/en-us/library/cc245503(v=prot.10).aspx
#
# Returns:
#
# A hash reference with the kerberos keys
#
sub _decodeKerberos
{
my ($self, $data) = @_;
my $kerberosKeys = [];
$data = pack('H*', $data); # from hex to binary
my $format = 's x2 s s s s l a*';
if (length ($data) > 16) {
my ($revision, $nCredentials, $nOldCredentials, $saltLength, $maxSaltLength, $saltOffset) = unpack($format, $data);
if ($revision == 3) {
my ($saltValue) = unpack('@' . $saltOffset . 'a' . $maxSaltLength, $data);
my $offset = 16;
for (my $i=0; $i<$nCredentials; $i++) {
my ($keyType, $keyLength, $keyOffset) = unpack('@' . $offset . 'x8 l l l', $data);
# From MS-SAMR Security Account Manager (SAM) Remote Protocol Specification (Client-to-Server) (v20110610)
# Section 2.2.10.8: When the current domain functional level is DS_BEHAVIOR_WIN2003 or
# less, a Windows Server 2008 or Windows Server 2008 R2 DC includes a KeyType of -140 in each of
# KERB_STORED_CREDENTIAL and KERB_STORED_CREDENTIAL_NEW, which is not needed and can
# be ignored; it is a dummy type in the supplemental credentials that is not present when the domain
# functional level is raised to DS_BEHAVIOR_WIN2008 or greater. The key data is the NT hash of the
# password.
my ($keyValue) = unpack('@' . $keyOffset . 'a' . $keyLength, $data);
$offset += 20;
my $key = {
type => $keyType,
value => $keyValue,
salt => decode ('UTF-16LE', $saltValue),
};
push (@{$kerberosKeys}, $key) if ($keyType != -140);
}
}
}
return $kerberosKeys;
}
sub _decodeKerberosNewerKeys
{
my ($self, $data) = @_;
my $kerberosKeys = [];
$data = pack('H*', $data); # from hex to binary
my $format = 's x2 s s s s s s l l a*';
if (length ($data) > 24) {
my ($revision, $nCredentials, $nServiceCredentials,
$nOldCredentials, $nOlderCredentials,
$saltLength, $maxSaltLength,
$saltOffset, $defaultIterationCount) = unpack ($format, $data);
if ($revision == 4) {
my ($saltValue) = unpack('@' . $saltOffset . 'a' . $maxSaltLength, $data);
my $offset = 24;
for(my $i=0; $i<$nCredentials; $i++) {
my ($keyType, $keyLength, $keyOffset) = unpack('@' . $offset . 'x12 l l l', $data);
my ($keyValue) = unpack('@' . $keyOffset . 'a' . $keyLength, $data);
$offset += 24;
my $key = {
type => $keyType,
value => $keyValue,
salt => decode ('UTF-16LE', $saltValue),
};
push (@{$kerberosKeys}, $key) if ($keyType != -140);
}
}
}
return $kerberosKeys;
}
# Method: _decodeSupplementalCredentials
#
# this struct is documented at:
# http://msdn.microsoft.com/en-us/library/cc245500(v=prot.10).aspx
# The USER_PROPERTIES contains various USER_PROPERTY structs,
# documented at:
# http://msdn.microsoft.com/en-us/library/cc245501(v=prot.10).aspx
#
# Returns:
#
# A hash reference containing the different hashes
# of the user credentials in different formats
#
sub _decodeSupplementalCredentials
{
my ($self, $blob) = @_;
my $credentials = {};
my $blobFormat = 'x4 L< x2 x2 x96 S< S< a*';
if (length ($blob) > 112) {
my ($blobLength, $blobSignature, $nProperties, $properties) = unpack ($blobFormat, $blob);
# Check the signature. Its value must be 0x50
if ($blobSignature == 0x50) {
my $offset = 112;
for (my $i=0; $i<$nProperties; $i++) {
my ($propertyNameLength) = unpack('@' . $offset . 'S<', $blob);
$offset += 2;
my ($propertyValueLength) = unpack('@' . $offset . 'S<', $blob);
$offset += 4; # 2 bytes + 2 bytes reserved
my ($propertyName) = unpack('@' . $offset . 'a' . $propertyNameLength, $blob);
$offset += $propertyNameLength;
my ($propertyValue) = unpack('@' . $offset . 'a' . $propertyValueLength, $blob);
$offset += $propertyValueLength;
if($propertyName eq encode('UTF-16LE', 'Primary:Kerberos')) {
$credentials->{'Primary:Kerberos'} = $self->_decodeKerberos($propertyValue);
}
elsif($propertyName eq encode('UTF-16LE', 'Primary:Kerberos-Newer-Keys')) {
$credentials->{'Primary:Kerberos-Newer-Keys'} = $self->_decodeKerberosNewerKeys($propertyValue);
}
elsif($propertyName eq encode('UTF-16LE', 'Primary:WDigest')) {
$credentials->{'Primary:WDigest'} = $self->_decodeWDigest($propertyValue);
}
elsif($propertyName eq encode('UTF-16LE', 'Primary:CLEARTEXT')) {
$credentials->{'Primary:CLEARTEXT'} = decode('UTF-16LE', pack ('H*', $propertyValue));
}
}
} else {
throw EBox::Exceptions::Internal("Corrupted supplementalCredentials");
}
} else {
throw EBox::Exceptions::Internal("Truncated supplementalCredentials");
}
return $credentials;
}
# Method: _decodeSambaCredentials
#
# This method gets all the credentials stored in the
# LDB for the user
#
# Parameters:
#
# supplementalCredentialsBlob
# unicodePwdBlob
#
# Returns:
#
# A hash reference containing all found credentials
#
sub _decodeSambaCredentials
{
my ($self, $supplementalCredentialsBlob, $unicodePwdBlob) = @_;
my $credentials = {};
if (defined $supplementalCredentialsBlob) {
my $properties = $self->_decodeSupplementalCredentials($supplementalCredentialsBlob);
if (exists $properties->{'Primary:Kerberos-Newer-Keys'}) {
$credentials->{kerberosKeys} = $properties->{'Primary:Kerberos-Newer-Keys'};
} elsif (exists $properties->{'Primary:Kerberos'}) {
$credentials->{kerberosKeys} = $properties->{'Primary:Kerberos'};
}
if (exists $properties->{'Primary:WDigest'}) {
$credentials->{WDigest} = $properties->{'Primary:WDigest'};
}
if (exists $properties->{'Primary:CLEARTEXT'}) {
$credentials->{clearText} = $properties->{'Primary:CLEARTEXT'};
}
}
if (defined $unicodePwdBlob) {
unless (exists $credentials->{kerberosKeys}) {
$credentials->{kerberosKeys} = [];
}
if (scalar @{$credentials->{kerberosKeys}} > 0) {
# Copy salt from previous krb keys
my $key = {
type => 23,
salt => @{$credentials->{kerberosKeys}}[0]->{salt},
value => $unicodePwdBlob,
};
push (@{$credentials->{kerberosKeys}}, $key);
} else {
my $key = {
type => 23,
value => $unicodePwdBlob,
};
push (@{$credentials->{kerberosKeys}}, $key);
}
}
return $credentials;
}
1;
|